Fix license in meson.build

- Make license here match LICENSE
- According to meson docs, it should not be an array

.circleci/config.yml

@@ -1,27 +0,0 @@
-# Use the latest 2.1 version of CircleCI pipeline process engine.
-# See: https://circleci.com/docs/2.0/configuration-reference
-version: 2.1
-
-# Define a job to be invoked later in a workflow.
-# See: https://circleci.com/docs/2.0/configuration-reference/#jobs
-jobs:
-  build-tio:
-    # Specify the execution environment. You can specify an image from Dockerhub or use one of our Convenience Images from CircleCI's Developer Hub.
-    # See: https://circleci.com/docs/2.0/configuration-reference/#docker-machine-macos-windows-executor
-    docker:
-      - image: cimg/base:edge
-    # Add steps to the job
-    # See: https://circleci.com/docs/2.0/configuration-reference/#steps
-    steps:
-      - checkout
-      - run: sudo apt-get -qq update
-      - run: sudo apt-get install -y bash-completion git meson libinih-dev
-      - run: git clone https://github.com/tio/tio.git
-      - run: cd tio && meson build --prefix $HOME/test/tio && ninja -C build install
-
-# Invoke jobs via workflows
-# See: https://circleci.com/docs/2.0/configuration-reference/#workflows
-workflows:
-  build-tio-workflow:
-    jobs:
-      - build-tio

.clang-format

@@ -0,0 +1,5 @@
+BasedOnStyle: llvm
+IndentWidth: 4
+AllowShortFunctionsOnASingleLine: None
+KeepEmptyLinesAtTheStartOfBlocks: false
+BreakBeforeBraces: Allman

.github/workflows/codeql-buildscript.sh

@@ -0,0 +1,7 @@
+#!/usr/bin/env bash
+
+pip3 install meson -U
+pip3 install ninja -U
+sudo apt-get install -y liblua5.2-dev libglib2.0-dev
+meson setup build
+meson compile -C build

.github/workflows/codeql.yml

@@ -0,0 +1,126 @@
+# For most projects, this workflow file will not need changing; you simply need
+# to commit it to your repository.
+#
+# You may wish to alter this file to override the set of languages analyzed,
+# or to provide custom queries or build logic.
+#
+# ******** NOTE ********
+# We have attempted to detect the languages in your repository. Please check
+# the `language` matrix defined below to confirm you have the correct set of
+# supported CodeQL languages.
+#
+name: "CodeQL"
+
+on:
+  push:
+    branches: [ "main", "master" ]
+  schedule:
+    - cron: '0 0 * * *'
+  pull_request:
+    branches: '*'
+
+jobs:
+  analyze:
+    name: Analyze
+    # Runner size impacts CodeQL analysis time. To learn more, please see:
+    #   - https://gh.io/recommended-hardware-resources-for-running-codeql
+    #   - https://gh.io/supported-runners-and-hardware-resources
+    #   - https://gh.io/using-larger-runners
+    # Consider using larger runners for possible analysis time improvements.
+    runs-on: ${{ (matrix.language == 'swift' && 'macos-latest') || 'ubuntu-22.04' }}
+    timeout-minutes: ${{ (matrix.language == 'swift' && 120) || 360 }}
+    permissions:
+      actions: read
+      contents: read
+      security-events: write
+
+    strategy:
+      fail-fast: false
+      matrix:
+        language: [ 'cpp' ]
+        # CodeQL supports [ 'cpp', 'csharp', 'go', 'java', 'javascript', 'python', 'ruby', 'swift' ]
+        # Use only 'java' to analyze code written in Java, Kotlin or both
+        # Use only 'javascript' to analyze code written in JavaScript, TypeScript or both
+        # Learn more about CodeQL language support at https://aka.ms/codeql-docs/language-support
+
+    steps:
+    - name: Checkout repository
+      uses: actions/checkout@v3
+      with:
+        submodules: recursive
+
+    # Initializes the CodeQL tools for scanning.
+    - name: Initialize CodeQL
+      uses: github/codeql-action/init@v3
+      with:
+        languages: ${{ matrix.language }}
+        # If you wish to specify custom queries, you can do so here or in a config file.
+        # By default, queries listed here will override any specified in a config file.
+        # Prefix the list here with "+" to use these queries and those in the config file.
+
+        # For more details on CodeQL's query packs, refer to: https://docs.github.com/en/code-security/code-scanning/automatically-scanning-your-code-for-vulnerabilities-and-errors/configuring-code-scanning#using-queries-in-ql-packs
+        # queries: security-extended,security-and-quality
+        queries: security-and-quality
+
+
+    # Autobuild attempts to build any compiled languages (C/C++, C#, Go, Java, or Swift).
+    # If this step fails, then you should remove it and run the build manually (see below)
+    #- name: Autobuild
+    #  uses: github/codeql-action/autobuild@v3
+
+    # ℹ️ Command-line programs to run using the OS shell.
+    # 📚 See https://docs.github.com/en/actions/using-workflows/workflow-syntax-for-github-actions#jobsjob_idstepsrun
+
+    #   If the Autobuild fails above, remove it and uncomment the following three lines.
+    #   modify them (or add more) to build your code if your project, please refer to the EXAMPLE below for guidance.
+
+    - run: |
+        ./.github/workflows/codeql-buildscript.sh
+
+    - name: Perform CodeQL Analysis
+      uses: github/codeql-action/analyze@v3
+      with:
+        category: "/language:${{matrix.language}}"
+        upload: false
+      id: step1
+
+    # Filter out rules with low severity or high false positve rate
+    # Also filter out warnings in third-party code
+    - name: Filter out unwanted errors and warnings
+      uses: advanced-security/filter-sarif@v1
+      with:
+        patterns: |
+          -**:cpp/path-injection
+          -**:cpp/world-writable-file-creation
+          -**:cpp/poorly-documented-function
+          -**:cpp/potentially-dangerous-function
+          -**:cpp/use-of-goto
+          -**:cpp/integer-multiplication-cast-to-long
+          -**:cpp/comparison-with-wider-type
+          -**:cpp/leap-year/*
+          -**:cpp/ambiguously-signed-bit-field
+          -**:cpp/suspicious-pointer-scaling
+          -**:cpp/suspicious-pointer-scaling-void
+          -**:cpp/unsigned-comparison-zero
+          -**/cmake*/Modules/**
+        input: ${{ steps.step1.outputs.sarif-output }}/cpp.sarif
+        output: ${{ steps.step1.outputs.sarif-output }}/cpp.sarif
+
+    - name: Upload CodeQL results to code scanning
+      uses: github/codeql-action/upload-sarif@v3
+      with:
+        sarif_file: ${{ steps.step1.outputs.sarif-output }}
+        category: "/language:${{matrix.language}}"
+
+    - name: Upload CodeQL results as an artifact
+      if: success() || failure()
+      uses: actions/upload-artifact@v4
+      with:
+        name: codeql-results
+        path: ${{ steps.step1.outputs.sarif-output }}
+        retention-days: 5
+
+    - name: Fail if an error is found
+      run: |
+        ./.github/workflows/fail_on_error.py \
+          ${{ steps.step1.outputs.sarif-output }}/cpp.sarif

.github/workflows/fail_on_error.py

@@ -0,0 +1,34 @@
+#!/usr/bin/env python3
+
+import json
+import sys
+
+# Return whether SARIF file contains error-level results
+def codeql_sarif_contain_error(filename):
+    with open(filename, 'r') as f:
+        s = json.load(f)
+
+    for run in s.get('runs', []):
+        rules_metadata = run['tool']['driver']['rules']
+        if not rules_metadata:
+            rules_metadata = run['tool']['extensions'][0]['rules']
+
+        for res in run.get('results', []):
+            if 'ruleIndex' in res:
+                rule_index = res['ruleIndex']
+            elif 'rule' in res and 'index' in res['rule']:
+                rule_index = res['rule']['index']
+            else:
+                continue
+            try:
+                rule_level = rules_metadata[rule_index]['defaultConfiguration']['level']
+            except IndexError as e:
+                print(e, rule_index, len(rules_metadata))
+            else:
+                if rule_level == 'error':
+                    return True
+    return False
+
+if __name__ == "__main__":
+    if codeql_sarif_contain_error(sys.argv[1]):
+        sys.exit(1)

.github/workflows/macos.yml

@@ -0,0 +1,30 @@
+name: MacOS build
+
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+    branches:
+      - master
+
+jobs:
+  build:
+    runs-on: macos-latest
+
+    steps:
+    - uses: actions/checkout@v4
+
+    - uses: actions/setup-python@v5
+      with:
+        python-version: '3.x'
+
+    - name: Install dependencies
+      run: |
+        brew install meson ninja lua
+
+    - name: Build
+      run: |
+        meson setup build
+        meson compile -C build --verbose
+        meson install -C build

.github/workflows/ubuntu.yml

@@ -0,0 +1,31 @@
+name: Ubuntu build
+
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+    branches:
+      - master
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v4
+
+    - uses: actions/setup-python@v5
+      with:
+        python-version: '3.x'
+
+    - name: Install dependencies
+      run: |
+        sudo apt update
+        sudo apt install -y bash-completion git meson liblua5.2-dev libglib2.0-dev
+
+    - name: Build
+      run: |
+        meson setup build --prefix $HOME/opt/tio
+        meson compile -C build --verbose
+        meson install -C build

.gitignore

@@ -1,3 +1,4 @@
 /build
 /subprojects/libinih
 *.swp
+.cache

.typos.toml

@@ -0,0 +1,2 @@
+[default]
+extend-ignore-words-re = ["tio"]

AUTHORS

@@ -34,5 +34,37 @@ Yin Fengwei <fengwei.yin@intel.com>
 Liam Beguin <liambeguin@gmail.com>
 Peter Collingbourne <pcc@google.com>
 g0mb4 <gomba007@gmail.com>
+ZeroMemoryEx on GitHub
+George Joseph <g.devel@wxy78.net>
+Robert Snell <rcsnell@ncf.ca>
+Rui Chen <rui@chenrui.dev>
+Ralph Siemsen <ralphs@netwinder.org>
+Victor Oliveira <rhapsodyv@gmail.com>
+Attila Veghelyi <aveghelyi@dension.com>
+Vyacheslav Patkov <slava@patkov.ru>
+Bill Hass <billhass@umich.edu>
+Peter van Dijk <peter@7bits.nl>
+Braden Young <braden@somewearlabs.com>
+Wes Koerber <wkoerber@acsd4u.com>
+HiFiPhile <admin@hifiphile.com>
+Paul Ruizendaal <pnr@planet.nl>
+Fredrik Svedberg <fredrik@svedberg.us>
+Sebastian <sebastian.krahmer@gmail.com>
+Mingjie Shen <shen497@purdue.edu>
+Brian <bayuan@purdue.edu>
+Davis C <davisclaib@gmail.com>
+KhazAkar <damianzrb@zohomail.eu>
+Eliot Alan Foss <eliotfoss@gmail.com>
+Robert Lipe <robertlipe@gpsbabel.org>
+Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
+Tomka Gergely <tomkatudor@gmail.com>
+Steve Marple <stevemarple@googlemail.com>
+konosubakonoakua <ailike_meow@qq.com>
+Keith Hill <k_hill@unitronlp.com>
+Lubov66 <radolevanja@gmail.com>
+V <v@anomalous.eu>
+Samuel Holland <samuel@sholland.org>
+David Ordnung <david.ordnung@googlemail.com>
+
 
 Thanks to everyone who has contributed to this project.

LICENSE

@@ -1,4 +1,4 @@
-Copyright (c) 2014-2022  Martin Lund <martin.lund@keep-it-simple.com>
+Copyright (c) 2014-2025  Martin Lund <martin.lund@keep-it-simple.com>
 
 This program is free software; you can redistribute it and/or
 modify it under the terms of the GNU General Public License

README.md

@@ -1,14 +1,20 @@
-# tio - a simple serial device I/O tool
 
-[![CircleCI](https://circleci.com/gh/tio/tio/tree/master.svg?style=shield)](https://circleci.com/gh/tio/tio/tree/master)
-[![tio](https://snapcraft.io/tio/badge.svg)](https://snapcraft.io/tio)
-[![Packaging status](https://repology.org/badge/tiny-repos/tio.svg)](https://repology.org/project/tio/versions)
+[![tio](images/tio-icon.png)]()
+
+# tio - a serial device I/O tool
+
+[![](https://img.shields.io/github/actions/workflow/status/tio/tio/ubuntu.yml?label=Ubuntu)](https://github.com/tio/tio/actions/workflows/ubuntu.yml)
+[![](https://img.shields.io/github/actions/workflow/status/tio/tio/macos.yml?label=MacOS)](https://github.com/tio/tio/actions/workflows/macos.yml)
+[![](https://github.com/tio/tio/actions/workflows/codeql.yml/badge.svg)](https://github.com/tio/tio/actions/workflows/codeql.yml)
+[![](https://img.shields.io/codefactor/grade/github/tio/tio)](https://www.codefactor.io/repository/github/tio/tio)
+[![](https://img.shields.io/github/v/release/tio/tio?sort=semver)](https://github.com/tio/tio/releases)
+[![](https://img.shields.io/repology/repositories/tio)](https://repology.org/project/tio/versions)
 
 ## 1. Introduction
 
-tio is a simple serial device tool which features a straightforward
-command-line and configuration file interface to easily connect to serial TTY
-devices for basic I/O operations.
+tio is a serial device tool which features a straightforward command-line and
+configuration file interface to easily connect to serial TTY devices for basic
+I/O operations.
 
 <p align="center">
 <img src="images/tio-demo.gif">
@@ -16,169 +22,527 @@ devices for basic I/O operations.
 
 ### 1.1 Motivation
 
-To make a simpler serial device tool for talking with TTY devices with less
-focus on classic terminal/modem features and more focus on the needs of
+To make a simpler serial device tool for working with serial TTY devices with
+less focus on classic terminal/modem features and more focus on the needs of
 embedded developers and hackers.
 
-tio was originally created to replace
+tio was originally created as an alternative to
 [screen](https://www.gnu.org/software/screen) for connecting to serial devices
 when used in combination with [tmux](https://tmux.github.io).
 
-## 2. Usage
+## 2. Features
 
-### 2.1 Command-line
+ * Easily connect to serial TTY devices
+ * Sensible defaults (115200 8n1)
+ * Automatic connection management
+   * Automatic detection of serial ports
+   * Automatic reconnect
+   * Automatically connect to first new appearing serial device
+   * Automatically connect to latest registered serial device
+ * Connect to same port/device combination via unique topology ID (TID)
+   * Useful for reconnecting when serial device has no serial device by ID
+ * Support for non-standard baud rates
+ * Support for mark and space parity
+ * X-modem (1K/CRC) and Y-modem file upload
+ * Support for RS-485 mode
+ * List available serial devices
+   * By device
+     * Including topology ID, uptime, driver, description
+     * Sorted by uptime (newest device listed last)
+   * By ID
+   * By path
+ * Show RX/TX statistics
+ * Toggle serial lines
+ * Pulse serial lines with configurable pulse duration
+ * Local echo support
+ * Remapping of characters (nl, cr-nl, bs, lowercase to uppercase, etc.)
+ * Switchable independent input and output
+   * Normal mode
+   * Hex mode (output supports variable width)
+   * Line mode (input only)
+ * Timestamp support
+   * Per line in normal output mode
+   * Output timeout timestamps in hex output mode
+ * Support for delayed output
+   * Per character
+   * Per line
+ * Log to file
+   * Automatic naming of log file (default)
+   * Configurable directory for saving automatic named log files
+   * Manual naming of log file
+   * Overwrite (default) or append to log file
+   * Strip control characters and escape sequences
+ * Configuration file support
+   * Support for configuration profiles
+   * Activate configuration profiles by name or pattern
+   * Support for including other configuration files
+ * Redirect I/O of shell command to serial device
+ * Redirect I/O to UNIX socket or IPv4/v6 network socket
+   * Useful for scripting or TTY sharing
+ * Pipe input and/or output
+ * Bash completion on options, serial device names, and profile names
+ * Configurable tio message text color
+   * Supports NO_COLOR env variable as per [no-color.org](https://no-color.org)
+ * Visual or audible alert on connect/disconnect
+ * Remapping of prefix key
+ * Lua scripting support for automation
+   * Run script manually or automatically at connect (once/always/never)
+   * Simple expect/send like functionality with support for regular expressions
+   * Manipulate port modem lines (useful for microcontroller reset/boot etc.)
+   * Send files via x/y-modem protocol
+   * Search for serial devices
+ * Man page documentation
+ * Plays nicely with [tmux](https://tmux.github.io) and similar terminal multiplexers
+
+## 3. Usage
+
+For more usage details please see the man page documentation
+[here](https://raw.githubusercontent.com/tio/tio/master/man/tio.1.txt).
+
+### 3.1 Command-line
 
 The command-line interface is straightforward as reflected in the output from
-'tio --help':
+```tio --help```:
 ```
-    Usage: tio [<options>] <tty-device|config>
+Usage: tio [<options>] <tty-device|profile|tid>
 
-    Options:
-      -b, --baudrate <bps>             Baud rate (default: 115200)
-      -d, --databits 5|6|7|8           Data bits (default: 8)
-      -f, --flow hard|soft|none        Flow control (default: none)
-      -s, --stopbits 1|2               Stop bits (default: 1)
-      -p, --parity odd|even|none       Parity (default: none)
-      -o, --output-delay <ms>          Character output delay (default: 0)
-      -n, --no-autoconnect             Disable automatic connect
-      -e, --local-echo                 Enable local echo
-      -t, --timestamp                  Enable line timestamp
-          --timestamp-format <format>  Set timestamp format (default: 24hour)
-      -L, --list-devices               List available serial devices
-      -l, --log                        Enable logging to file
-          --log-file <filename>        Set log filename
-          --log-strip                  Strip control characters and escape sequences
-      -m, --map <flags>                Map special characters
-      -c, --color 0..255|none|list     Colorize tio text (default: 15)
-      -S, --socket <socket>            Redirect I/O to socket
-      -x, --hex                        Enable hexadecimal mode
-      -v, --version                    Display version
-      -h, --help                       Display help
+Connect to TTY device directly or via configuration profile or topology ID.
 
-    Options may be set via configuration file.
+Options:
+  -b, --baudrate <bps>                   Baud rate (default: 115200)
+  -d, --databits 5|6|7|8                 Data bits (default: 8)
+  -f, --flow hard|soft|none              Flow control (default: none)
+  -s, --stopbits 1|2                     Stop bits (default: 1)
+  -p, --parity odd|even|none|mark|space  Parity (default: none)
+  -o, --output-delay <ms>                Output character delay (default: 0)
+  -O, --output-line-delay <ms>           Output line delay (default: 0)
+      --line-pulse-duration <duration>   Set line pulse duration
+  -a, --auto-connect new|latest|direct   Automatic connect strategy (default: direct)
+      --exclude-devices <pattern>        Exclude devices by pattern
+      --exclude-drivers <pattern>        Exclude drivers by pattern
+      --exclude-tids <pattern>           Exclude topology IDs by pattern
+  -n, --no-reconnect                     Do not reconnect
+  -e, --local-echo                       Enable local echo
+      --input-mode normal|hex|line       Select input mode (default: normal)
+      --output-mode normal|hex|hexN      Select output mode (default: normal)
+  -t, --timestamp                        Enable line timestamp
+      --timestamp-format <format>        Set timestamp format (default: 24hour)
+      --timestamp-timeout <ms>           Set timestamp timeout (default: 200)
+  -l, --list                             List available serial devices, TIDs, and profiles
+  -L, --log                              Enable log to file
+      --log-file <filename>              Set log filename
+      --log-directory <path>             Set log directory path for automatic named logs
+      --log-append                       Append to log file
+      --log-strip                        Strip control characters and escape sequences
+  -m, --map <flags>                      Map characters
+  -c, --color 0..255|bold|none|list      Colorize tio text (default: bold)
+  -S, --socket <socket>                  Redirect I/O to socket
+      --rs-485                           Enable RS-485 mode
+      --rs-485-config <config>           Set RS-485 configuration
+      --alert bell|blink|none            Alert on connect/disconnect (default: none)
+      --mute                             Mute tio messages
+      --script <string>                  Run script from string
+      --script-file <filename>           Run script from file
+      --script-run once|always|never     Run script on connect (default: always)
+      --exec <command>                   Execute shell command with I/O redirected to device
+  -v, --version                          Display version
+  -h, --help                             Display help
 
-    In session, press ctrl-t q to quit.
+Options and profiles may be set via configuration file.
 
-    See the man page for more details.
+In session you can press ctrl-t ? to list available key commands.
+
+See the man page for more details.
 ```
 
-By default tio automatically connects to the provided TTY device if present.
-If the device is not present, it will wait for it to appear and then connect.
-If the connection is lost (eg. device is unplugged), it will wait for the
-device to reappear and then reconnect. However, if the `--no-autoconnect`
-option is provided, tio will exit if the device is not present or an
-established connection is lost.
+By default tio automatically connects to the provided TTY device. If the device
+is not present, tio will wait for it to appear and then connect. If the
+connection is lost (e.g. device is unplugged), it will wait for the device to
+reappear and then reconnect. However, if the `--no-reconnect` option is
+provided, tio will exit if the device is not present or an established
+connection is lost.
 
-tio features full bash autocompletion.
+#### 3.1.1 Examples
 
-### 2.2 Key commands
+Typical use is without options:
+```
+$ tio /dev/ttyUSB0
+```
+
+Which corresponds to the commonly used default options:
+```
+$ tio --baudrate 115200 --databits 8 --flow none --stopbits 1 --parity none /dev/ttyUSB0
+```
+
+List available serial devices:
+```
+$ tio --list
+Device            TID     Uptime [s] Driver           Description
+----------------- ---- ------------- ---------------- --------------------------
+/dev/ttyS4        BaaB     19526.576 port             16550A UART
+/dev/ttyS5        eV0Z     19525.845 port             16550A UART
+/dev/ttyUSB1      bCC2      1023.274 ftdi_sio         TTL232R-3V3
+/dev/ttyUSB0      SPpw       978.527 ftdi_sio         TTL232RG-VREG3V3
+/dev/ttyACM0      i5q4         2.079 cdc_acm          ST-Link VCP Ctrl
+
+By-id
+--------------------------------------------------------------------------------
+/dev/serial/by-id/usb-FTDI_TTL232R-3V3_FTCHUV56-if00-port0
+/dev/serial/by-id/usb-FTDI_TTL232RG-VREG3V3_FT1NELUB-if00-port0
+/dev/serial/by-id/usb-STMicroelectronics_STLINK-V3_004900343438510234313939-if02
+
+By-path
+--------------------------------------------------------------------------------
+/dev/serial/by-path/pci-0000:00:14.0-usb-0:8.1.3.1.4:1.0-port0
+/dev/serial/by-path/pci-0000:00:14.0-usbv2-0:8.1.3.1.4:1.0-port0
+/dev/serial/by-path/pci-0000:00:14.0-usbv2-0:6.4:1.0-port0
+/dev/serial/by-path/pci-0000:00:14.0-usb-0:6.4:1.0-port0
+/dev/serial/by-path/pci-0000:00:14.0-usbv2-0:6.3:1.2
+/dev/serial/by-path/pci-0000:00:14.0-usb-0:6.3:1.2
+
+Configuration profiles (/home/lundmar/.config/tio/config)
+--------------------------------------------------------------------------------
+rpi3                stm32               esp32               am64-evm
+imx8mp-evk          nucleo-h743zi2      usb-devices
+```
+
+It is recommended to connect serial TTY devices by ID:
+```
+$ tio /dev/serial/by-id/usb-FTDI_TTL232R-3V3_FTCHUV56-if00-port0
+```
+Note: Using serial devices by ID helps ensure that tio automatically reconnects
+to the same serial device when reattached, even when it enumerates differently.
+
+If no serial device by ID is available it is recommended to connect via
+topology ID (TID):
+```
+$ tio bCC2
+```
+Note: The TID is unique and will stay the same as long as your USB serial port
+device plugs into the same USB topology (same ports, same hubs, same
+connections, etc.). This way it is possible for tio to successfully reconnect
+to the same device.
+
+Connect automatically to first new appearing serial device:
+```
+$ tio --auto-connect new
+```
+
+Connect automatically to latest registered serial device:
+```
+$ tio --auto-connect latest
+```
+
+It is possible to use exclude options to affect which serial devices are
+involved in the automatic connection strategy:
+```
+$ tio --auto-connect new --exclude-devices "/dev/ttyACM?,/dev/ttyUSB2"
+```
+
+And to exclude drivers by pattern:
+```
+$ tio --auto-connect new --exclude-drivers "cdc_acm,ftdi_sio"
+```
+Note: Pattern matching supports '*' and '?'. Use comma separation to define
+multiple patterns.
+
+To include drivers by specific pattern simply negate the exclude option:
+```
+$ tio --auto-connect new --exclude-drivers !("cp2102")
+```
+
+Log to file with autogenerated filename:
+```
+$ tio --log /dev/ttyUSB0
+```
+
+Log to file with specific filename:
+```
+$ tio --log --log-file my-log.txt
+```
+
+Enable ISO8601 timestamps per line:
+```
+$ tio --timestamp --timestamp-format iso8601 /dev/ttyUSB0
+```
+
+Output to hex with width 16:
+```
+$ tio --output-mode hex16 /dev/ttyUSB0
+```
+
+Redirect I/O to IPv4 network socket on port 4242:
+```
+$ tio --socket inet:4242 /dev/ttyUSB0
+```
+
+Map NL to CR-NL on input from device and DEL to BS on output to device:
+```
+$ tio --map INLCRNL,ODELBS /dev/ttyUSB0
+```
+
+Pipe data to the serial device:
+```
+$ cat data.bin | tio /dev/ttyUSB0
+```
+
+Manipulate modem lines on connect:
+```
+$ tio --script "tio.set{DTR=high,RTS=low}; tio.msleep(100); tio.set{DTR=toggle,RTS=toggle}" /dev/ttyUSB0
+```
+
+Pipe command to serial device and wait for line response within 1 second:
+```
+$ echo "*IDN?" | tio /dev/ttyACM0 --script "tio.expect('\r\n', 1000)" --mute
+KORAD KD3305P V4.2 SN:32475045
+```
+
+### 3.2 Key commands
 
 Various in session key commands are supported. When tio is started, press
 ctrl-t ? to list the available key commands.
 
 ```
-[20:19:12.040] Key commands:
-[20:19:12.040]  ctrl-t ?   List available key commands
-[20:19:12.040]  ctrl-t b   Send break
-[20:19:12.040]  ctrl-t c   Show configuration
-[20:19:12.040]  ctrl-t d   Toggle DTR line
-[20:19:12.040]  ctrl-t e   Toggle local echo mode
-[20:19:12.040]  ctrl-t h   Toggle hexadecimal mode
-[20:19:12.040]  ctrl-t l   Clear screen
-[20:19:12.040]  ctrl-t L   Show line states
-[20:19:12.040]  ctrl-t q   Quit
-[20:19:12.040]  ctrl-t r   Toggle RTS line
-[20:19:12.041]  ctrl-t s   Show statistics
-[20:19:12.041]  ctrl-t t   Send ctrl-t key code
-[20:19:12.041]  ctrl-t T   Toggle line timestamp mode
-[20:19:12.041]  ctrl-t v   Show version
+[15:02:53.269] Key commands:
+[15:02:53.269]  ctrl-t ?       List available key commands
+[15:02:53.269]  ctrl-t b       Send break
+[15:02:53.269]  ctrl-t c       Show configuration
+[15:02:53.269]  ctrl-t e       Toggle local echo mode
+[15:02:53.269]  ctrl-t f       Toggle log to file
+[15:02:53.269]  ctrl-t F       Flush data I/O buffers
+[15:02:53.269]  ctrl-t g       Toggle serial port line
+[15:02:53.269]  ctrl-t i       Toggle input mode
+[15:02:53.269]  ctrl-t l       Clear screen
+[15:02:53.269]  ctrl-t L       Show line states
+[15:02:53.269]  ctrl-t m       Change mapping of characters on input or output
+[15:02:53.269]  ctrl-t o       Toggle output mode
+[15:02:53.269]  ctrl-t p       Pulse serial port line
+[15:02:53.269]  ctrl-t q       Quit
+[15:02:53.269]  ctrl-t r       Run script
+[15:02:53.269]  ctrl-t R       Execute shell command with I/O redirected to device
+[15:02:53.269]  ctrl-t s       Show statistics
+[15:02:53.269]  ctrl-t t       Toggle line timestamp mode
+[15:02:53.269]  ctrl-t v       Show version
+[15:02:53.269]  ctrl-t x       Send file via Xmodem
+[15:02:53.269]  ctrl-t y       Send file via Ymodem
+[15:02:53.269]  ctrl-t ctrl-t  Send ctrl-t character
 ```
 
-### 2.3 Configuration file
+If needed, the prefix key (ctrl-t) can be remapped via configuration file.
+
+### 3.3 Configuration file
 
 Options can be set via the configuration file first found in any of the
 following locations in the order listed:
- - $XDG_CONFIG_HOME/tio/tiorc
- - $HOME/.config/tio/tiorc
- - $HOME/.tiorc
+ - $XDG_CONFIG_HOME/tio/config
+ - $HOME/.config/tio/config
+ - $HOME/.tioconfig
 
-The configuration file supports sub-configurations using named sections which can
-be activated via the command-line by name or pattern.
+The configuration file supports profiles using named sections which can be
+activated via the command-line by name or pattern. A profile specifies which
+TTY device to connect to and other options.
+
+### 3.3.1 Example
 
 Example configuration file:
 
 ```
-# Defaults
+[default]
 baudrate = 115200
 databits = 8
 parity = none
 stopbits = 1
 color = 10
 
-[ftdi]
-tty = /dev/serial/by-id/usb-FTDI_TTL232R-3V3_FTGQVXBL-if00-port0
+[rpi3]
+device = /dev/serial/by-id/usb-FTDI_TTL232R-3V3_FTGQVXBL-if00-port0
+no-reconnect = true
+log = true
+log-file = rpi3.log
+line-pulse-duration = DTR=200,RTS=150
+color = 11
+
+[svf2]
+device = /dev/ttyUSB0
 baudrate = 9600
-no-autoconnect = enable
-log = enable
-log-file = ftdi.log
+script = tio.expect("login: "); tio.write("root\n"); tio.expect("Password: "); tio.write("root\n")
 color = 12
 
-[usb devices]
-pattern = usb([0-9]*)
-tty = /dev/ttyUSB%s
+[esp32]
+device = /dev/serial/by-id/usb-0403_6014-if00-port0
+script = tio.set{DTR=high,RTS=low}; tio.msleep(100); tio.set{DTR=low,RTS=high}; tio.msleep(100); tio.set{RTS=low}
+script-run = once
 color = 13
+
+[usb-devices]
+pattern = ^usb([0-9]*)
+device = /dev/ttyUSB%m1
+color = 14
 ```
 
-To use a specific sub-configuration by name simply start tio like so:
+To use a specific profile by name simply start tio like so:
 ```
-$ tio ftdi
+$ tio rpi3
 ```
 Or by pattern match:
 ```
 $ tio usb12
 ```
 
+Another more elaborate configuration file example is available [here](examples/config/config).
 
-## 3. Installation
+### 3.4 Lua script API
+
+Tio suppots Lua scripting to easily automate interaction with the tty device.
+
+In addition to the standard Lua API tio makes the following functions
+and variables available:
+
+
+#### `tio.expect(pattern, timeout)`
+
+Waits for the Lua pattern to match or timeout before continuing.
+Timeout is in milliseconds, defaults to 0 meaning it will wait forever.
+
+Returns the captures from the pattern or `nil` on timeout.
+
+#### `tio.read(size, timeout)`
+
+Read up to `size` bytes from serial device. If timeout is 0 or not provided it
+will wait forever until data is ready to read.
+
+Returns a string up to `size` bytes long on success and `nil` on timeout.
+
+#### `tio.readline(timeout)`
+
+Read line from serial device. If timeout is 0 or not provided it will wait
+forever until data is ready to read.
+
+Returns a string on success and `nil` on timeout.  On timeout a partially read
+line may be returned as a second return value.
+
+#### `tio.write(string)`
+
+Write string to serial device.
+
+Returns the `tio` table.
+
+#### `tio.send(file, protocol)`
+
+Send file using x/y-modem protocol.
+
+Protocol can be any of `XMODEM_1K`, `XMODEM_CRC`, `YMODEM`.
+
+#### `tio.ttysearch()`
+
+Search for serial devices.
+
+Returns a table of number indexed tables, one for each serial device found.
+Each of these tables contains the serial device information accessible via the
+following string indexed elements "path", "tid", "uptime", "driver",
+"description".
+
+Returns `nil` if no serial devices are found.
+
+#### `tio.set{line=state, ...}`
+Set state of one or multiple tty modem lines.
+
+Line can be any of `DTR`, `RTS`, `CTS`, `DSR`, `CD`, `RI`
+
+State is `high`, `low`, or `toggle`.
+
+#### `tio.sleep(seconds)`
+
+Sleep for seconds.
+
+#### `tio.msleep(ms)`
+
+Sleep for milliseconds.
+
+#### `tio.alwaysecho`
+
+A boolean value, defaults to `true`.
+
+If `tio.alwaysecho` is `false`, the result of `tio.read`, `tio.readline` or
+`tio.expect` will only be returned from the function and not logged or printed.
+
+If `tio.alwaysecho` is set to `true`, reading functions also emit a single
+timestamp to stdout and log file per `options.timestamp` and `options.log`.
+
+
+## 4. Installation
+
+### 4.1 Installation using package manager (Linux)
 
-### 3.1 Installation using package manager
 Packages for various GNU/Linux distributions are available. Please consult your
 package manager tool to find and install tio.
 
-### 3.2 Installation using snap
+If you would like to see tio included in your favorite distribution, please
+reach out to its package maintainers team.
+
+### 4.2 Installation using snap (Linux)
 
 Install latest stable version:
 ```
-    $ snap install tio
-```
-Install bleeding edge:
-```
-    $ snap install tio --edge
+$ snap install tio --classic
 ```
 
-### 3.3 Installation from source
+Note: Classic confinement is currently required due to limitations of the snapcraft framework.
+See [Issue #187](https://github.com/tio/tio/issues/187) for discussion.
+
+### 4.3 Installation using brew (MacOS, Linux)
+
+If you have [brew](http://brew.sh) installed:
+```
+$ brew install tio
+```
+
+### 4.4 Installation using MSYS2 (Windows)
+
+If you have [MSYS2](https://www.msys2.org) installed:
+```
+$ pacman -S tio
+```
+
+### 4.5 Installation from source
 
 The latest source releases can be found [here](https://github.com/tio/tio/releases).
 
+Before running the install steps make sure you have glib and lua libraries installed. For example:
+
+```
+$ sudo apt install libglib2.0-dev liblua5.2-dev
+```
+
 Install steps:
 ```
-    $ meson build
-    $ meson compile -C build
-    $ meson install -C build
+$ meson setup build
+$ meson compile -C build
+$ meson install -C build
 ```
 
 See meson\_options.txt for tio specific build options.
 
-Note: Please do no try to install from source if you are not familiar with
-how to build stuff using meson.
+Note: The meson install steps may differ depending on your specific system.
+
+### 4.6 Known issues
+
+Getting permission access errors trying to open your serial device?
+
+Add your user to the group which allows serial device access permanently. For example, to add your user to the 'dialout' group do:
+```bash
+sudo usermod -a -G dialout <username>
+```
+Switch to the "dialout" group, temporary but immediately for this session.
+```bash
+newgrp dialout
+```
 
 
-## 4. Contributing
+## 5. Contributing
 
-tio is open source. If you want to help out with the project please feel free
-to join in.
-
-All contributions (bug reports, code, doc, ideas, etc.) are welcome.
+This is an open source project - all contributions (bug reports, code, doc,
+ideas, etc.) are welcome.
 
 Please use the github issue tracker and pull request features.
 
@@ -188,23 +552,23 @@ consider making a donation of your choice:
 [![Donate](images/paypal.png)](https://www.paypal.me/lundmar)
 
 
-## 5. Support
+## 6. Support
 
 Submit bug reports via GitHub: https://github.com/tio/tio/issues
 
 
-## 6. Website
+## 7. Website
 
 Visit [tio.github.io](https://tio.github.io)
 
 
-## 7. License
+## 8. License
 
 tio is GPLv2+. See LICENSE file for more details.
 
 
-## 8. Authors
+## 9. Authors
 
-Created by Martin Lund \<martin.lund@keep-it-simple.com>
+Maintained by Martin Lund \<martin.lund@keep-it-simple.com>
 
 See the AUTHORS file for full list of contributors.

TODO

@@ -1,4 +1,111 @@
+ * Add release support for arm and x86 binary tarballs
 
- * Improve error/warning messaging when parsing configuration file
+ * Support input and input mapping from lua scripts
 
- * Add support for piping to tio
+ * Add option to send file raw (no modem protocol)
+
+ * Add loopback option
+
+   Send received serial input back to output (for testing etc.)
+
+ * Add loopback support between two serial ports
+
+   Useful for traffic monitoring
+
+ * Add mapping feature for printing non-printable characters
+
+ * Porting layer to support native win32 builds.
+
+   Some of the work that needs to be done: 
+
+    All posix functions need to be platform independent, go though file by file:
+
+    termios.h
+    unistd.h has very limited functions
+    ENV different in config_file_resolve
+    errno
+    sys/ioctl.h
+    sys/poll.h
+    socket, may need a new thread
+    Serial, RS485, character mapping
+    Communication pipe
+
+    Port enumerate, all devices of the same type have the same name (eg. USB
+    Serial Device for ttyACM) -> which makes regex not meaningful (kind of a
+    good thing since libtre in Mingw has too much dependencies makes binary too
+    big)
+
+ * Support traditional hex output format such as:
+
+   00000000  74 65 73 74 20 74 65 73  74 20 74 65 73 74 20 74  |test test test t|
+   00000010  65 73 74 64 66 0a 61 0a  66 61 0a 66 0a 61 73 66  |estdf.a.fa.f.asf|
+   00000020  64 61 64 73 66 61 73 66  64 61 73 64 66 61 64 73  |dadsfasfdasdfads|
+   00000030  66 0a 61 73 64 66 61 64  73 66 61 73 64 66 61 73  |f.asdfadsfasdfas|
+   00000040  64 66 0a 61 73 64 66 61  64 73 66 61 73 64 66 61  |df.asdfadsfasdfa|
+   00000050  73 64 66 66 64 61 73 64  66 0a 0a 31 32 33 31 0a  |sdffdasdf..1231.|
+   00000060  65 32 31 64 73 77 65 64  0a 0a                    |e21dswed..|
+   0000006a
+
+ * Add support for activity based time stamping in normal output mode
+
+   Already supported in hex output mode.
+
+ * Allow tio to connect to socket
+
+   After some more consideration I think it makes sense to support connecting to a
+   socket as that will make tio be able to both serve a serial port via a socket
+   and connect to it - it will be an end to end solution. In short we will be able
+   to do the following:
+
+   Host serial port on socket (existing feature):
+    $ tio --socket unix:/tmp/tio-socket-0 /dev/ttyUSB0
+
+   Connect to same socket (new feature):
+    $ tio unix:/tmp/tio-socket-0
+
+   Besides a bit of refactoring the following required changes spring to mind:
+
+    * Socket mode and type of socket should be activated via device name prefix. For example:
+      * UNIX socket: tio unix:<filename>
+      * TCPv4 socket: tio inet:<ip>:<port>
+      * TCPv6 socket: tio inet6:<ip>:<port>
+    * If no port number defined default to 3333
+    * Mapping flags INLCR, IGNCR, ICRNL needs implementation for socket mode
+    * Error messages should just say "device" instead of "tty device" etc.
+    * Remove other tty'isms (tty_write() should be device_write() etc.)
+    * In session key commands that do not work in socket mode should either not be listed or print an error messages if used.
+    * All non-tty features should continue work (auto-connect etc.)
+    * Shell completion script update
+    * Man page update
+
+
+ * Split I/O feature
+
+   Allow to split input and output so that it is possible to manage these
+   independently.
+
+   The general idea is to redirect the output stream on the socket port number
+   specified but then redirect the input stream on the same port number + 1.
+
+   Example:
+
+    $ tio /dev/ttyUSB0 --socket inet:4444,split-io
+
+   Will result in output stream being hosted on port 4444 and input stream
+   hosted on port 4445.
+
+   For file sockets something similar can be arranged:
+
+    $ tio /dev/ttyUSB0 --socket unix:/tmp/tio-socket-0,split-io
+
+   Will result in output stream being hosted via /tmp/tio-socket-0 and input
+   stream hosted via /tmp/tio-socket-0_input
+
+ * Websocket support
+
+   Extend the socket feature to redirect serial I/O to websocket on e.g. port
+   1234 like so:
+
+    $ tio --socket ws:1234
+
+   Use libwesockets to implement feature.

examples/config/config

@@ -0,0 +1,78 @@
+###############################
+# tio - https://tio.github.io #
+###############################
+
+# Example tio configuration file
+#
+# Place file in any of the following locations:
+#  $XDG_CONFIG_HOME/tio/config
+#  $HOME/.config/tio/config
+#  $HOME/.tioconfig
+
+[default]
+baudrate = 115200
+databits = 8
+flow = none
+stopbits = 1
+parity = none
+output-delay = 0
+output-line-delay = 0
+auto-connect = direct
+no-reconnect = false
+local-echo = false
+input-mode = normal
+output-mode = normal
+timestamp = false
+log = false
+log-append = false
+log-strip = false
+color = bold
+rs-485 = false
+alert = none
+script-run = always
+prefix-ctrl-key = t
+
+# Configuration profiles
+
+[rpi3]
+baudrate = 115200
+device = /dev/serial/by-id/usb-FTDI_FT232R_USB_UART_A6009HU3-if00-port0
+socket = unix:/tmp/tio-socket-0
+color = 9
+
+[am64-evm]
+baudrate = 115200
+device = /dev/serial/by-id/usb-Silicon_Labs_CP2105_Dual_USB_to_UART_Bridge_Controller_01093176-if01-port0
+line-pulse-duration = DTR=200,RTS=300,RI=50
+alert = bell
+color = 10
+
+[tincan]
+baudrate = 9600
+device = /dev/serial/by-id/usb-TinCanTools_Flyswatter2_FS20000-if00-port0
+log = true
+log-file = tincan.log
+log-strip = true
+color = 11
+
+[usb-devices]
+pattern = ^usb([0-9]*)
+device = /dev/ttyUSB%m1
+color = 12
+
+[rs-485-device]
+device = /dev/ttyUSB0
+rs-485 = true
+rs-485-config = RTS_ON_SEND=1,RTS_AFTER_SEND=1,RTS_DELAY_BEFORE_SEND=60,RTS_DELAY_AFTER_SEND=80,RX_DURING_TX
+color = 13
+
+[esp32]
+device = /dev/ttyUSB0
+color = 14
+script = tio.set{DTR=high,RTS=low}; tio.msleep(100); tio.set{DTR=low,RTS=high}; tio.msleep(100); tio.set{RTS=low}
+script-run = always
+
+[buspirate]
+device = /dev/ttyACM0
+map = INLCRNL,ODELBS
+color = 15

examples/lua/automatic-linux-login.lua

@@ -0,0 +1,28 @@
+local logins = {
+    ["foo"] = {
+        username = "foouser",
+        password = "foopass",
+    },
+    ["bar"] = {
+        username = "baruser",
+        password = "barpass",
+    },
+    ["baz"] = {
+        username = "bazuser",
+        password = "bazpass",
+    },
+}
+
+local hostname = tio.expect("^(%g+) login:", 10)
+if hostname then
+    local login = logins[hostname]
+    if (nil ~= login) then
+        tio.write(login.username .. "\n")
+        tio.expect("Password:")
+        tio.write(login.password .. "\n")
+    else
+        io.write("\r\nDon't know login info for " .. hostname .. "\r\n")
+    end
+else
+    io.write("\r\nDidn't find a login prompt\r\n")
+end

examples/lua/control-lines-test.lua

@@ -0,0 +1,5 @@
+tio.set{DTR=high, RTS=low}
+tio.msleep(100)
+tio.set{DTR=low, RTS=high}
+tio.msleep(100)
+tio.set{RTS=toggle}

examples/lua/read.lua

@@ -0,0 +1,14 @@
+tio.read(1000, 6000) -- initial config
+tio.write("\n")
+tio.msleep(100)
+tio.read(650, 60) -- main menu
+tio.write("S") -- S menu
+tio.msleep(30)
+tio.read(650, 60)
+tio.write("t") -- Parallel Value Table
+tio.read(650, 60)
+while true do
+  tio.msleep(1000)
+  tio.write("t")
+  tio.read(650, 50) -- repeat PVT forever
+end

examples/lua/read_line.lua

@@ -0,0 +1,15 @@
+tio.read(1000, 8000) -- read initial config
+tio.write("\n")
+tio.read(650, 100) -- main menu
+tio.write("S") -- S menu
+repeat
+  str = tio.readline(25)
+until str == nil
+while true do
+  tio.write("t") -- query PV table
+  tio.msleep(880)
+  repeat
+    str = tio.readline(60)
+    tio.msleep(60)
+  until str == nil
+end

examples/lua/serial-device-search.lua

@@ -0,0 +1,13 @@
+io.write("Searching... ")
+
+local device = tio.ttysearch()
+
+io.write("done\r\n")
+
+for i in ipairs(device) do
+        io.write("\r\n" .. device[i]["path"] .. "\r\n")
+        io.write(" tid = " .. device[i]["tid"] .. "\r\n")
+        io.write(" uptime = " .. device[i]["uptime"] .. "\r\n")
+        io.write(" driver = " .. device[i]["driver"] .. "\r\n")
+        io.write(" description = " .. device[i]["description"] .. "\r\n")
+end

man/tio.1.in

@@ -1,17 +1,16 @@
 .TH "tio" "1" "@version_date@" "tio @version@" "User Commands"
 
 .SH "NAME"
-tio \- a simple serial device I/O tool
+tio \- a serial device I/O tool
 
 .SH "SYNOPSIS"
 .PP
 .B tio
-.RI "[" <options> "] " "<tty-device|config>"
+.RI "[" <options> "] " "<tty-device|profile|tid>"
 
 .SH "DESCRIPTION"
 .PP
-.B tio
-is a simple serial device tool which features a straightforward command-line
+\fBtio\fR is a serial device tool which features a straightforward command-line
 and configuration file interface to easily connect to serial TTY devices for
 basic I/O operations.
 
@@ -22,35 +21,107 @@ basic I/O operations.
 
 Set baud rate [bps] (default: 115200).
 .TP
-.BR \-d ", " "\-\-databits 5" | 6 | 7 | 8
+.BR \-d ", " "\-\-databits " 5 | 6 | 7 | 8
 
 Set data bits (default: 8).
 .TP
-.BR \-f ", " "\-\-flow hard" | soft | none
+.BR \-f ", " "\-\-flow " hard | soft | none
 
 Set flow control (default: none).
 .TP
-.BR \-s ", " "\-\-stopbits 1" | 2
+.BR \-s ", " "\-\-stopbits " 1 | 2
 
 Set stop bits (default: 1).
 .TP
-.BR \-p ", " "\-\-parity odd" | even | none
+.BR \-p ", " "\-\-parity " odd | even | none | mark | space
 
 Set parity (default: none).
+
+Note: With \fBmark\fR parity the parity bit is always 0. With \fBspace\fR
+parity the parity bit is always 1. Not all platforms support \fBmark\fR and
+\fBspace\fR parity.
+
 .TP
 .BR \-o ", " "\-\-output\-delay " \fI<ms>
 
 Set output delay [ms] inserted between each sent character (default: 0).
+
 .TP
-.BR \-n ", " \-\-no\-autoconnect
+.BR \-O ", " "\-\-output\-line\-delay " \fI<ms>
 
-Disable automatic connect.
+Set output delay [ms] inserted between each sent line (default: 0).
 
-By default tio automatically connects to the provided device if present. If the device is not present, it will wait for it to appear and then connect. If the connection is lost (eg. device disconnects), it will wait for the device to reappear and then reconnect.
+.TP
+.BR "    \-\-line\-pulse\-duration " \fI<duration>
 
-However, if the
-.B \-\-no\-autoconnect
-option is provided, tio will exit if the device is not present or an established connection is lost.
+Set the pulse duration [ms] of each serial port line using the following key
+value pair format in the duration field: <key>=<value>
+
+Each key represents a serial line. The following keys are available:
+
+.RS
+.TP 8n
+.IP \fBDTR
+Data Terminal Ready
+.IP \fBRTS
+Request To Send
+.IP \fBCTS
+Clear To Send
+.IP \fBDSR
+Data Set Ready
+.IP \fBDCD
+Data Carrier Detect
+.IP \fBRI
+Ring Indicator
+.P
+If defining more than one key value pair, the pairs must be comma separated.
+
+The default pulse duration for each line is 100 ms.
+.RE
+
+.TP
+.BR "\-a, \-\-auto\-connect new|latest|direct"
+
+Automatically connect to serial device according to one of the following
+strategies:
+
+.RS
+.TP 10n
+.IP "\fBnew"
+Automatically connect to first new appearing serial device.
+.IP "\fBlatest"
+Automatically connect to latest registered serial device.
+.IP "\fBdirect"
+Connect directly to specified TTY device.
+.P
+All the listed strategies automatically reconnects according to strategy if
+device is not available or connection is lost.
+.P
+Default value is "direct".
+.RE
+
+.TP
+.BR "    \-\-exclude\-devices \fI<pattern>"
+
+Exclude devices by pattern ('*' and '?' supported).
+
+.TP
+.BR "    \-\-exclude\-drivers \fI<pattern>"
+
+Exclude drivers by pattern ('*' and '?' supported).
+
+.TP
+.BR "    \-\-exclude\-tids \fI<pattern>"
+
+Exclude topology IDs by pattern ('*' and '?' supported).
+
+.TP
+.BR \-n ", " \-\-no\-reconnect
+
+Do not reconnect.
+
+This means that tio will exit if it fails to connect to device or an
+established connection is lost.
 
 .TP
 .BR \-e ", " "\-\-local\-echo
@@ -63,37 +134,69 @@ Enable local echo.
 Enable line timestamp.
 
 .TP
-.BR "    \-\-timestamp-format \fI<format>
+.BR "    \-\-timestamp\-format \fI<format>"
 
 Set timestamp format to any of the following timestamp formats:
 .RS
 .TP 16n
+
 .IP "\fB24hour"
 24-hour format ("hh:mm:ss.sss")
 .IP "\fB24hour-start"
 24-hour format relative to start time
+.IP "\fB24hour-delta"
+24-hour format relative to previous timestamp
 .IP "\fBiso8601"
 ISO8601 format ("YYYY-MM-DDThh:mm:ss.sss")
-.P
-Default format is
-.B 24hour
+.IP "\fBepoch"
+Seconds since Unix epoch (1970-01-01)
+.IP "\fBepoch-usec"
+Seconds since Unix epoch (1970-01-01) with subdivision in microseconds
+.PP
+Default format is \fB24hour\fR
 .RE
 
 .TP
-.BR \-L ", " \-\-list\-devices
+.BR "    \-\-timestamp\-timeout \fI<ms>"
 
-List available serial devices.
+Set timestamp timeout value in milliseconds.
+
+This value only takes effect in hex output mode where timestamps are only
+printed after elapsed timeout time of no output activity from tty device.
+
+Default value is 200.
 
 .TP
-.BR \-l ", " \-\-log
+.BR \-l ", " \-\-list
 
-Enable logging to file. If no filename is provided the filename will be automatically generated.
+List available targets (serial devices, TIDs, configuration profiles).
 
 .TP
-.BR "    \-\-log-file \fI<filename>
+.BR \-L ", " \-\-log
+
+Enable log to file.
+
+The log file will be automatically named using the following format
+tio_TARGET_YYYY-MM-DDTHH:MM:SS.log. Target being the command line target such
+as tty-device, tid, or configuration profile.
+
+The filename can be manually set using the \-\-log-file option.
+
+.TP
+.BR "    \-\-log\-file \fI<filename>
 
 Set log filename.
 
+.TP
+.BR "    \-\-log\-directory \fI<path>
+
+Set log directory path in which to save automatically named log files.
+
+.TP
+.BR "    \-\-log\-append
+
+Append to log file.
+
 .TP
 .BR "    \-\-log-strip
 
@@ -102,47 +205,89 @@ Strip control characters and escape sequences from log.
 .TP
 .BR \-m ", " "\-\-map " \fI<flags>
 
-Map (replace, translate) special characters on input or output. The following mapping flags are supported:
+Map (replace, translate) characters on input to the serial device or output
+from the serial device. The following mapping flags are supported:
+
 .RS
 .TP 12n
 .IP "\fBICRNL"
-Map CR to NL on input (unless IGNCR is set).
+Map CR to NL on input (unless IGNCR is set)
 .IP "\fBIGNCR"
-Ignore CR on input.
+Ignore CR on input
+.IP "\fBIFFESCC"
+Map FF to ESC-c on input
 .IP "\fBINLCR"
-Map NL to CR on input.
+Map NL to CR on input
 .IP "\fBINLCRNL"
-Map NL to CR-NL on input.
+Map NL to CR-NL on input
+.IP "\fBICRCRNL"
+Map CR to CR-NL on input
+.IP "\fBIMSB2LSB"
+Map MSB bit order to LSB on input
 .IP "\fBOCRNL"
-Map CR to NL on output.
+Map CR to NL on output
 .IP "\fBODELBS"
-Map DEL to BS on output.
+Map DEL to BS on output
 .IP "\fBONLCRNL"
-Map NL to CR-NL on output.
+Map NL to CR-NL on output
+.IP "\fBOLTU"
+Map lowercase characters to uppercase on output
+.IP "\fBONULBRK"
+Map nul (zero) to send break signal on output
+.IP "\fBOIGNCR"
+Ignore CR on output
 .P
 If defining more than one flag, the flags must be comma separated.
 .RE
 
 .TP
-.BR \-x ", " \-\-hex\-mode
+.BR "    \-\-input\-mode " normal|hex|line
 
-Enable hexadecimal mode.
+Set input mode.
+
+In normal mode input characters are sent immediately as they are typed.
+
+In hex input mode bytes can be sent by typing the \fBtwo-character
+hexadecimal\fR representation of the 1 byte value, e.g.: to send \fI0xA\fR you
+must type \fI0a\fR or \fI0A\fR.
+
+In line input mode input characters are sent when you press enter. The only
+editing feature supported in this mode is backspace.
+
+Default value is "normal".
 
 .TP
-.BR \-c ", " "\-\-color " \fI0..255|none|list
+.BR "    \-\-output\-mode " normal|hex|hexN
 
-Colorize tio text using ANSI color code value ranging from 0 to 255 or use "none" for no color.
+Set output mode.
+
+In hex mode each incoming byte is printed out as a 1 byte hex value.
+
+In hexN mode, N is a number less than or equal to 4096 which defines how many
+hex values will be printed before a line break.
+
+Default value is "normal".
+
+.TP
+.BR \-c ", " "\-\-color " 0..255|bold|none|list
+
+Colorize tio text using ANSI color code value ranging from 0 to 255 or use
+"none" for no color or use "bold" to apply bold formatting to existing system
+color.
 
 Use "list" to print a list of available ANSI color codes.
 
-Default value is 15.
+Default value is "bold".
 
 .TP
 .BR \-S ", " "\-\-socket \fI<socket>\fR\fB
 
-Redirect I/O to socket. Any input from clients connected to the socket is sent on the serial port as if entered at the terminal where tio is running (except that
-.B ctrl-t
-sequences are not recognized), and any input from the serial port is multiplexed to the terminal and all connected clients.
+Redirect I/O to socket.
+
+Any input from clients connected to the socket is sent on the serial port as if
+entered at the terminal where tio is running (except that \fBctrl-t\fR sequences
+are not recognized), and any input from the serial port is multiplexed to the
+terminal and all connected clients.
 
 Sockets remain open while the serial port is disconnected, and writes will block.
 
@@ -162,6 +307,74 @@ If port is 0 or no port is provided default port 3333 is used.
 At present there is a hardcoded limit of 16 clients connected at one time.
 .RE
 
+.TP
+.BR "    \-\-rs\-485"
+
+Enable RS-485 mode.
+
+.TP
+.BR "    \-\-rs\-485\-config " \fI<config>
+
+Set the RS-485 configuration using the following key or key value pair format in
+the configuration field:
+
+.RS
+.TP 30n
+.IP \fBRTS_ON_SEND=value
+Set logical level (0 or 1) for RTS pin when sending
+.IP \fBRTS_AFTER_SEND=value
+Set logical level (0 or 1) for RTS pin after sending
+.IP \fBRTS_DELAY_BEFORE_SEND=value
+Set RTS delay (ms) before sending
+.IP \fBRTS_DELAY_AFTER_SEND=value
+Set RTS delay (ms) after sending
+.IP \fBRX_DURING_TX
+Receive data even while sending data
+.P
+If defining more than one key or key value pair, they must be comma separated.
+.RE
+
+.TP
+.BR "\-\-alert none|bell|blink"
+
+Set alert action on connect/disconnect.
+
+It will sound the bell once or blink once on successful connect. Likewise it
+will sound the bell twice or blink twice on disconnect.
+
+Default value is "none".
+
+.TP
+.BR "\-\-mute"
+
+Mute tio messages.
+
+.TP
+.BR "\-\-script \fI<string>
+
+Run script from string.
+
+.TP
+.BR "\-\-script\-file \fI<filename>
+
+Run script from file with filename.
+
+.TP
+.BR "\-\-script\-run once|always|never"
+
+Run script on connect once, always, or never.
+
+Default value is "always".
+
+.TP
+.BR "\-\-exec \fI<command>
+
+Execute shell command with I/O redirected to device
+
+.TP
+.BR "\-\-complete-profiles
+
+Prints profiles (for shell completion)
 .TP
 .BR \-v ", " \-\-version
 
@@ -170,10 +383,10 @@ Display program version.
 .BR \-h ", " \-\-help
 
 Display help.
-.SH "KEYS"
+.SH "KEY COMMANDS"
 .PP
 .TP 16n
-In session, the following key sequences are intercepted as tio commands:
+In session, all key strokes are forwarded to the serial device except the following key sequence: a prefix key (default: ctrl-t) followed by a command key. These sequences are intercepted as key commands:
 .IP "\fBctrl-t ?"
 List available key commands
 .IP "\fBctrl-t b"
@@ -182,54 +395,147 @@ Send serial break (triggers SysRq on Linux, etc.)
 Show configuration (baudrate, databits, etc.)
 .IP "\fBctrl-t e"
 Toggle local echo mode
-.IP "\fBctrl-t h"
-Toggle hexadecimal mode
+.IP "\fBctrl-t f"
+Toggle log to file
+.IP "\fBctrl-t F"
+Flush data I/O buffers (discard data written but not transmitted and data received but not read)
+.IP "\fBctrl-t g"
+Toggle serial port line
+.IP "\fBctrl-t i"
+Toggle input mode
 .IP "\fBctrl-t l"
 Clear screen
+.IP "\fBctrl-t L"
+Show line states (DTR, RTS, CTS, DSR, DCD, RI)
+.IP "\fBctrl-t m"
+Change mapping of characters on input or output
+.IP "\fBctrl-t o"
+Toggle output mode
+.IP "\fBctrl-t p"
+Pulse serial port line
 .IP "\fBctrl-t q"
 Quit
+.IP "\fBctrl-t r"
+Run script
+.IP "\fBctrl-t R"
+Execute shell command with I/O redirected to device
 .IP "\fBctrl-t s"
 Show TX/RX statistics
 .IP "\fBctrl-t t"
-Send ctrl-t key code
-.IP "\fBctrl-t L"
-Show line states (DTR, RTS, CTS, DSR, DCD, RI)
-.IP "\fBctrl-t d"
-Toggle DTR
-.IP "\fBctrl-t r"
-Toggle RTS
+Toggle line timestamp mode
 .IP "\fBctrl-t v"
 Show version
+.IP "\fBctrl-t x"
+Send file using the XMODEM-1K or XMODEM-CRC protocol (prompts for file name and protocol)
+.IP "\fBctrl-t y"
+Send file using the YMODEM protocol (prompts for file name)
+.IP "\fBctrl-t ctrl-t"
+Send ctrl-t character
 
-.SH "HEXADECIMAL MODE"
-.TP
-In hexadecimal mode each incoming byte is printed out as a hexadecimal value.
-.TP
-Bytes can be sent in this mode by typing the \fBtwo-character hexadecimal\fR representation of the value, e.g.: to send \fI0xA\fR you must type \fI0a\fR or \fI0A\fR.
-
-.SH "CONFIGURATION"
+.SH "SCRIPT API"
 .PP
-.TP 16n
-Options can be set via a configuration file using the INI format. tio uses the configuration file first found in the following locations in the order listed: $XDG_CONFIG_HOME/tio/tiorc, $HOME/.config/tio/tiorc, $HOME/.tiorc
+Tio suppots Lua scripting to easily automate interaction with the tty device.
 
-.TP
-Config sections can be used to group settings.
+In addition to the standard Lua API tio makes the following functions
+and variables available:
 
-.TP
-.TP
-tio will try to match the user input to a config section by name or by pattern to get the tty and other options.
+.TP 6n
 
-.TP
-Options without any config section name sets the default options.
+.IP "\fBtio.expect(pattern, timeout)"
+Waits for the Lua pattern to match or timeout before continuing.
+Timeout is in milliseconds, defaults to 0 meaning it will wait forever.
 
-.TP
+Returns the captures from the pattern or nil on timeout.
+
+.IP "\fBtio.read(size, timeout)"
+Read up to size bytes from serial device. If timeout is 0 or not provided it
+will wait forever until data is ready to read.
+
+Returns a string up to size bytes long on success and nil on timeout.
+
+.IP "\fBtio.readline(timeout)"
+Read line from serial device. If timeout is 0 or not provided it will wait
+forever until data is ready to read.
+
+Returns a string on success and nil on timeout.  On timeout a partially read
+line may be returned as a second return value.
+
+.IP "\fBtio.write(string)"
+Write string to serial device.
+
+Returns the tio table.
+
+.IP "\fBtio.send(file, protocol)"
+Send file using x/y-modem protocol.
+
+Protocol can be any of XMODEM_1K, XMODEM_CRC, YMODEM.
+
+.IP "\fBtio.ttysearch()"
+Search for serial devices.
+
+Returns a table of number indexed tables, one for each serial device found.
+Each of these tables contains the serial device information accessible via the
+following string indexed elements "path", "tid", "uptime", "driver",
+"description".
+
+Returns nil if no serial devices are found.
+
+.IP "\fBtio.set{line=state, ...}"
+Set state of one or multiple tty modem lines.
+
+Line can be any of DTR, RTS, CTS, DSR, CD, RI
+
+State is high, low, or toggle.
+
+.IP "\fBtio.sleep(seconds)"
+Sleep for seconds.
+.IP "\fBtio.msleep(ms)"
+Sleep for milliseconds.
+
+.IP "\fBtio.alwaysecho"
+A boolean value, defaults to true.
+
+If tio.alwaysecho is false, the result of tio.read, tio.readline or tio.expect
+will only be returned from the function and not logged or printed.
+
+If tio.alwaysecho is set to true, reading functions also emit a single
+timestamp to stdout and log file per options.timestamp and options.log.
+
+.SH "CONFIGURATION FILE"
+.PP
+Options can be set via configuration file using the INI format. \fBtio\fR uses
+the configuration file first found in the following locations in the order
+listed:
+
+.PP
+.I $XDG_CONFIG_HOME/tio/config
+.PP
+.I $HOME/.config/tio/config
+.PP
+.I $HOME/.tioconfig
+
+.PP
+Labels can be used to group settings into named configuration profiles which
+can be activated from the command-line when starting tio.
+
+.PP
+\fBtio\fR will try to match the user input to a configuration profile by name or by
+pattern to get the TTY device and other options.
+
+.PP
+Options without any label change the default options.
+
+.PP
+Any options set via command-line will override options set in the configuration file.
+
+.PP
 The following configuration file options are available:
 
-.TP 20n
+.TP 25n
 .IP "\fBpattern"
 Pattern matching user input. This pattern can be an extended regular expression with a single group.
-.IP "\fBtty"
-tty device to open. If tty contains a "%s" it will be substituted with the first group match.
+.IP "\fBdevice"
+TTY device to open. If it contains a "%s" it is substituted with the first group match.
 .IP "\fBbaudrate"
 Set baud rate
 .IP "\fBdatabits"
@@ -241,13 +547,21 @@ Set stop bits
 .IP "\fBparity"
 Set parity
 .IP "\fBoutput-delay"
-Set output delay
-.IP "\fBno-autoconnect"
-Disable automatic connect
+Set output character delay
+.IP "\fBoutput-line-delay"
+Set output line delay
+.IP "\fBline-pulse-duration"
+Set line pulse duration
+.IP "\fBno-reconnect"
+Do not reconnect
 .IP "\fBlog"
-Enable logging to file
+Enable log to file
 .IP "\fBlog-file"
 Set log filename
+.IP "\fBlog-directory"
+Set log directory path in which to save automatically named log files.
+.IP "\fBlog-append"
+Append to log file
 .IP "\fBlog-strip"
 Enable strip of control and escape sequences from log
 .IP "\fBlocal-echo"
@@ -256,79 +570,207 @@ Enable local echo
 Enable line timestamp
 .IP "\fBtimestamp-format"
 Set timestamp format
+.IP "\fBtimestamp-timeout"
+Set timestamp timeout
 .IP "\fBmap"
-Map special characters on input or output
+Map characters on input or output
 .IP "\fBcolor"
 Colorize tio text using ANSI color code ranging from 0 to 255
-.IP "\fBhex-mode"
-Enable hexadecimal mode
+.IP "\fBinput-mode"
+Set input mode
+.IP "\fBoutput-mode"
+Set output mode
 .IP "\fBsocket"
 Set socket to redirect I/O to
+.IP "\fBprefix-ctrl-key"
+Set prefix ctrl key (a..z or 'none', default: t)
+.IP "\fBrs-485"
+Enable RS-485 mode
+.IP "\fBrs-485-config"
+Set RS-485 configuration
+.IP "\fBalert"
+Set alert action on connect/disconnect
+.IP "\fBmute"
+Mute tio messages
+.IP "\fBscript"
+Run script from string
+.IP "\fBscript-file"
+Run script from file
+.IP "\fBscript-run"
+Run script on connect
+.IP "\fBexec"
+Execute shell command with I/O redirected to device
 
-.SH "CONFIGURATION EXAMPLES"
+.PP
+It is possible to include the content of other configuration files using the
+include directive like so: "[include <file>]".
+
+.SH "CONFIGURATION FILE EXAMPLES"
 
 .TP
-A typical config section used as a short-hand would be defined as such:
+To change the default configuration simply set options like so:
 
 .RS
 .nf
 .eo
-[ftdi]
-baudrate=115200
-tty=/dev/serial/by-id/usb-FTDI_TTL232R-3V3_FTGQVXBL-if00-port0
-color=11
+[default]
+baudrate = 9600
+databits = 8
+parity = none
+stopbits = 1
+color = 10
+line-pulse-duration = DTR=200,RTS=400
 .ec
 .fi
 .RE
 
 .TP
-With this config section defined in the configuration file the following commands would be equivalent:
+Named configuration profiles can be added via labels:
 
-$ tio ftdi
+.RS
+.nf
+.eo
+[rpi3]
+device = /dev/serial/by-id/usb-FTDI_TTL232R-3V3_FTGQVXBL-if00-port0
+baudrate = 115200
+color = 11
+.ec
+.fi
+.RE
+
+.TP
+Activate the configuration profile by name:
+
+$ tio rpi3
+
+.TP
+Which is equivalent to:
 
 $ tio -b 115200 -c 11 /dev/serial/by-id/usb-FTDI_TTL232R-3V3_FTGQVXBL-if00-port0
 
 .TP
-A config section can also be matched by its pattern which supports regular expressions:
+A configuration profile can also be activated by its pattern which supports regular expressions:
 
 .RS
 .nf
 .eo
-[usb device]
-pattern=usb([0-9]*)
-baudrate=115200
-tty=/dev/ttyUSB%s
+[usb-devices]
+pattern = ^usb([0-9]*)
+device = /dev/ttyUSB%m1
+baudrate = 115200
 .ec
 .fi
 .RE
 
 .TP
-Making the following commands equivalent:
+Activate the configuration profile by pattern match:
 
 $ tio usb12
 
+.TP
+Which becomes equivalent to:
+
 $ tio -b 115200 /dev/ttyUSB12
 
+.TP
+It is also possible to combine use of configuration profile and command-line options. For example:
+
+$ tio -l -t usb12
+
 .SH "EXAMPLES"
 .TP
-Typical use is without options. For example:
+Typical use is without options:
 
 $ tio /dev/ttyUSB0
 .TP
-Which corresponds to the commonly used options:
+Which corresponds to the commonly used default options:
 
 $ tio \-b 115200 \-d 8 \-f none \-s 1 \-p none /dev/ttyUSB0
 .TP
-It is recommended to connect serial tty devices by ID. For example:
+It is recommended to connect serial TTY devices by ID:
 
 $ tio /dev/serial/by\-id/usb\-FTDI_TTL232R-3V3_FTGQVXBL\-if00\-port0
 .PP
 Using serial devices by ID ensures that tio automatically reconnects to the
-correct serial device if the device is disconnected and then reconnected.
+correct serial device if it is disconnected and then reconnected.
 .TP
-To listen and redirect serial device I/O to network socket on port 4444 do:
+Redirect serial device I/O to Unix file socket for scripting:
 
-$ tio -S inet:4444 /dev/ttyUSB0
+$ tio -S unix:/tmp/tio-socket0 /dev/ttyUSB0
+
+.TP
+Then, to issue a command via the file socket simply do:
+
+$ echo "ls -la" | nc -UN /tmp/tio-socket0 > /dev/null
+
+.TP
+Or use the expect command to script an interaction:
+
+.RS
+.nf
+.eo
+#!/usr/bin/expect -f
+.sp
+set timeout -1
+log_user 0
+.sp
+spawn nc -UN /tmp/tio-socket0
+set uart $spawn_id
+.sp
+send -i $uart "date\n"
+expect -i $uart "prompt> "
+send -i $uart "ls -la\n"
+expect -i $uart "prompt> "
+.ec
+.fi
+.RE
+
+.TP
+It is also possible to use tio's own simpler expect/send script functionality to e.g. automate logins:
+
+$ tio --script 'tio.expect("login: "); tio.write("root\\n"); tio.expect("Password: "); tio.write("root\\n")' /dev/ttyUSB0
+
+.TP
+Redirect device I/O to network file socket for remote TTY sharing:
+
+$ tio --socket inet:4444 /dev/ttyUSB0
+
+.TP
+
+Then, use netcat to connect to the shared TTY session over network (assuming tio is hosted on IP 10.0.0.42):
+
+$ nc -N 10.0.0.42 4444
+
+.TP
+Pipe command to the serial device:
+
+$ echo "ls -la" | tio /dev/serial/by\-id/usb\-FTDI_TTL232R-3V3_FTGQVXBL\-if00\-port0
+
+.TP
+Pipe command to serial device and wait for line response within 1 second:
+
+$ echo "*IDN?" | tio /dev/ttyACM0 --script "tio.expect('\\r\\n', 1000)" --mute
+.TP
+
+.TP
+Likewise, to pipe data from file to the serial device:
+
+$ cat data.bin | tio /dev/serial/by\-id/usb\-FTDI_TTL232R-3V3_FTGQVXBL\-if00\-port0
+
+.TP
+Map NL to CR-NL on input from device and DEL to BS on output to device:
+
+$ tio --map INLCRNL,ODELBS /dev/ttyUSB0
+
+.TP
+Enable RS-485 mode:
+
+$ tio --rs-485 --rs-485-config=RTS_ON_SEND=1,RX_DURING_TX /dev/ttyUSB0
+
+.TP
+Manipulate DTR and RTS lines upon first connect to reset connected microcontroller:
+
+$ tio --script "tio.set{DTR=high,RTS=low}; tio.msleep(100); tio.set{RTS=toggle}" --script-run once /dev/ttyUSB0
 
 .SH "WEBSITE"
 .PP
@@ -336,4 +778,4 @@ Visit https://tio.github.io
 
 .SH "AUTHOR"
 .PP
-Created by Martin Lund <martin.lund@keep\-it\-simple.com>.
+Maintained by Martin Lund <martin.lund@keep\-it\-simple.com>.

man/tio.1.txt

@@ -0,0 +1,625 @@
+tio(1)                                                                                                         User Commands                                                                                                         tio(1)
+
+NAME
+       tio - a serial device I/O tool
+
+SYNOPSIS
+       tio [<options>] <tty-device|profile|tid>
+
+DESCRIPTION
+       tio is a serial device tool which features a straightforward command-line and configuration file interface to easily connect to serial TTY devices for basic I/O operations.
+
+OPTIONS
+       -b, --baudrate <bps>
+
+              Set baud rate [bps] (default: 115200).
+
+       -d, --databits 5|6|7|8
+
+              Set data bits (default: 8).
+
+       -f, --flow hard|soft|none
+
+              Set flow control (default: none).
+
+       -s, --stopbits 1|2
+
+              Set stop bits (default: 1).
+
+       -p, --parity odd|even|none|mark|space
+
+              Set parity (default: none).
+
+              Note: With mark parity the parity bit is always 0. With space parity the parity bit is always 1. Not all platforms support mark and space parity.
+
+       -o, --output-delay <ms>
+
+              Set output delay [ms] inserted between each sent character (default: 0).
+
+       -O, --output-line-delay <ms>
+
+              Set output delay [ms] inserted between each sent line (default: 0).
+
+           --line-pulse-duration <duration>
+
+              Set the pulse duration [ms] of each serial port line using the following key value pair format in the duration field: <key>=<value>
+
+              Each key represents a serial line. The following keys are available:
+
+              DTR     Data Terminal Ready
+
+              RTS     Request To Send
+
+              CTS     Clear To Send
+
+              DSR     Data Set Ready
+
+              DCD     Data Carrier Detect
+
+              RI      Ring Indicator
+
+              If defining more than one key value pair, the pairs must be comma separated.
+
+              The default pulse duration for each line is 100 ms.
+
+       -a, --auto-connect new|latest|direct
+
+              Automatically connect to serial device according to one of the following strategies:
+
+              new       Automatically connect to first new appearing serial device.
+
+              latest    Automatically connect to latest registered serial device.
+
+              direct    Connect directly to specified TTY device.
+
+              All the listed strategies automatically reconnects according to strategy if device is not available or connection is lost.
+
+              Default value is "direct".
+
+           --exclude-devices <pattern>
+
+              Exclude devices by pattern ('*' and '?' supported).
+
+           --exclude-drivers <pattern>
+
+              Exclude drivers by pattern ('*' and '?' supported).
+
+           --exclude-tids <pattern>
+
+              Exclude topology IDs by pattern ('*' and '?' supported).
+
+       -n, --no-reconnect
+
+              Do not reconnect.
+
+              This means that tio will exit if it fails to connect to device or an established connection is lost.
+
+       -e, --local-echo
+
+              Enable local echo.
+
+       -t, --timestamp
+
+              Enable line timestamp.
+
+           --timestamp-format <format>
+
+              Set timestamp format to any of the following timestamp formats:
+
+              24hour          24-hour format ("hh:mm:ss.sss")
+
+              24hour-start    24-hour format relative to start time
+
+              24hour-delta    24-hour format relative to previous timestamp
+
+              iso8601         ISO8601 format ("YYYY-MM-DDThh:mm:ss.sss")
+
+              epoch           Seconds since Unix epoch (1970-01-01)
+
+              epoch-usec      Seconds since Unix epoch (1970-01-01) with subdivision microseconds
+
+              Default format is 24hour
+
+           --timestamp-timeout <ms>
+
+              Set timestamp timeout value in milliseconds.
+
+              This value only takes effect in hex output mode where timestamps are only printed after elapsed timeout time of no output activity from tty device.
+
+              Default value is 200.
+
+       -l, --list
+
+              List available targets (serial devices, TIDs, configuration profiles).
+
+       -L, --log
+
+              Enable log to file.
+
+              The log file will be automatically named using the following format tio_TARGET_YYYY-MM-DDTHH:MM:SS.log. Target being the command line target such as tty-device, tid, or configuration profile.
+
+              The filename can be manually set using the --log-file option.
+
+           --log-file <filename>
+
+              Set log filename.
+
+           --log-directory <path>
+
+              Set log directory path in which to save automatically named log files.
+
+           --log-append
+
+              Append to log file.
+
+           --log-strip
+
+              Strip control characters and escape sequences from log.
+
+       -m, --map <flags>
+
+              Map (replace, translate) characters on input to the serial device or output from the serial device. The following mapping flags are supported:
+
+              ICRNL       Map CR to NL on input (unless IGNCR is set)
+
+              IGNCR       Ignore CR on input
+
+              IFFESCC     Map FF to ESC-c on input
+
+              INLCR       Map NL to CR on input
+
+              INLCRNL     Map NL to CR-NL on input
+
+              ICRCRNL     Map CR to CR-NL on input
+
+              IMSB2LSB    Map MSB bit order to LSB on input
+
+              OCRNL       Map CR to NL on output
+
+              ODELBS      Map DEL to BS on output
+
+              ONLCRNL     Map NL to CR-NL on output
+
+              OLTU        Map lowercase characters to uppercase on output
+
+              ONULBRK     Map nul (zero) to send break signal on output
+
+              OIGNCR      Ignore CR on output
+
+              If defining more than one flag, the flags must be comma separated.
+
+           --input-mode normal|hex|line
+
+              Set input mode.
+
+              In normal mode input characters are sent immediately as they are typed.
+
+              In hex input mode bytes can be sent by typing the two-character hexadecimal representation of the 1 byte value, e.g.: to send 0xA you must type 0a or 0A.
+
+              In line input mode input characters are sent when you press enter. The only editing feature supported in this mode is backspace.
+
+              Default value is "normal".
+
+           --output-mode normal|hex|hexN
+
+              Set output mode.
+
+              In hex mode each incoming byte is printed out as a 1 byte hex value.
+
+              In hexN mode, N is a number less than or equal to 4096 which defines how many hex values will be printed before a line break.
+
+              Default value is "normal".
+
+       -c, --color 0..255|bold|none|list
+
+              Colorize tio text using ANSI color code value ranging from 0 to 255 or use "none" for no color or use "bold" to apply bold formatting to existing system color.
+
+              Use "list" to print a list of available ANSI color codes.
+
+              Default value is "bold".
+
+       -S, --socket <socket>
+
+              Redirect I/O to socket.
+
+              Any  input from clients connected to the socket is sent on the serial port as if entered at the terminal where tio is running (except that ctrl-t sequences are not recognized), and any input from the serial port is multi‐
+              plexed to the terminal and all connected clients.
+
+              Sockets remain open while the serial port is disconnected, and writes will block.
+
+              Various socket types are supported using the following prefixes in the socket field:
+
+              unix:<filename>     Unix Domain Socket (file)
+
+              inet:<port>         Internet Socket (network)
+
+              inet6:<port>        Internet IPv6 Socket (network)
+
+              If port is 0 or no port is provided default port 3333 is used.
+
+              At present there is a hardcoded limit of 16 clients connected at one time.
+
+           --rs-485
+
+              Enable RS-485 mode.
+
+           --rs-485-config <config>
+
+              Set the RS-485 configuration using the following key or key value pair format in the configuration field:
+
+              RTS_ON_SEND=value             Set logical level (0 or 1) for RTS pin when sending
+
+              RTS_AFTER_SEND=value          Set logical level (0 or 1) for RTS pin after sending
+
+              RTS_DELAY_BEFORE_SEND=value   Set RTS delay (ms) before sending
+
+              RTS_DELAY_AFTER_SEND=value    Set RTS delay (ms) after sending
+
+              RX_DURING_TX                  Receive data even while sending data
+
+              If defining more than one key or key value pair, they must be comma separated.
+
+       --alert none|bell|blink
+
+              Set alert action on connect/disconnect.
+
+              It will sound the bell once or blink once on successful connect. Likewise it will sound the bell twice or blink twice on disconnect.
+
+              Default value is "none".
+
+       --mute
+
+              Mute tio messages.
+
+       --script <string>
+
+              Run script from string.
+
+       --script-file <filename>
+
+              Run script from file with filename.
+
+       --script-run once|always|never
+
+              Run script on connect once, always, or never.
+
+              Default value is "always".
+
+       --exec <command>
+
+              Execute shell command with I/O redirected to device
+
+       --complete-profiles
+
+              Prints profiles (for shell completion)
+
+       -v, --version
+
+              Display program version.
+
+       -h, --help
+
+              Display help.
+
+KEY COMMANDS
+       In session, all key strokes are forwarded to the serial device except the following key sequence: a prefix key (default: ctrl-t) followed by a command key. These sequences are intercepted as key commands:
+
+       ctrl-t ?        List available key commands
+
+       ctrl-t b        Send serial break (triggers SysRq on Linux, etc.)
+
+       ctrl-t c        Show configuration (baudrate, databits, etc.)
+
+       ctrl-t e        Toggle local echo mode
+
+       ctrl-t f        Toggle log to file
+
+       ctrl-t F        Flush data I/O buffers (discard data written but not transmitted and data received but not read)
+
+       ctrl-t g        Toggle serial port line
+
+       ctrl-t i        Toggle input mode
+
+       ctrl-t l        Clear screen
+
+       ctrl-t L        Show line states (DTR, RTS, CTS, DSR, DCD, RI)
+
+       ctrl-t m        Change mapping of characters on input or output
+
+       ctrl-t o        Toggle output mode
+
+       ctrl-t p        Pulse serial port line
+
+       ctrl-t q        Quit
+
+       ctrl-t r        Run script
+
+       ctrl-t R        Execute shell command with I/O redirected to device
+
+       ctrl-t s        Show TX/RX statistics
+
+       ctrl-t t        Toggle line timestamp mode
+
+       ctrl-t v        Show version
+
+       ctrl-t x        Send file using the XMODEM-1K or XMODEM-CRC protocol (prompts for file name and protocol)
+
+       ctrl-t y        Send file using the YMODEM protocol (prompts for file name)
+
+       ctrl-t ctrl-t   Send ctrl-t character
+
+SCRIPT API
+       Tio suppots Lua scripting to easily automate interaction with the tty device.
+
+       In addition to the standard Lua API tio makes the following functions available:
+
+       expect(string, timeout)
+             Expect string - waits for string to match or timeout before continuing.  Supports regular expressions. Special characters must be escaped with '\\'.  Timeout is in milliseconds, defaults to 0 meaning it will wait forever.
+
+             Returns 1 on successful match, 0 on timeout, or -1 on error.
+
+             On successful match it also returns the match string as second return value.
+
+       read(size, timeout)
+             Read up to size bytes from serial device. If timeout is 0 or not provided it will wait forever until data is ready to read.
+
+             Returns number of bytes read on success, 0 on timeout, or -1 on error.
+
+             On success, returns read string as second return value.  Also emits a single timestamp to stdout and log file per options.timestamp and options.log.
+
+       read_line(timeout)
+             Read line from serial device. If timeout is 0 or not provided it will wait forever until data is ready to read.
+
+             Returns number of bytes read on success, 0 on timeout, or -1 on error.
+
+             On success, returns the string that was read as second return value.  Also emits a single timestamp to stdout and log file per options.timestamp and options.log.
+
+       write(string)
+             Write string to serial device.
+
+             Returns number of bytes written on success or -1 on error.
+
+       send(file, protocol)
+             Send file using x/y-modem protocol.
+
+             Protocol can be any of XMODEM_1K, XMODEM_CRC, YMODEM.
+
+       tty_search()
+             Search for serial devices.
+
+             Returns a table of number indexed tables, one for each serial device found.  Each of these tables contains the serial device information accessible via the following string indexed elements "path", "tid",  "uptime",  "dri‐
+             ver", "description".
+
+             Returns nil if no serial devices are found.
+
+       set{line=state, ...}
+             Set state of one or multiple tty modem lines.
+
+             Line can be any of DTR, RTS, CTS, DSR, CD, RI
+
+             State is high, low, or toggle.
+
+       sleep(seconds)
+             Sleep for seconds.
+
+       msleep(ms)
+             Sleep for milliseconds.
+
+       exit(code)
+             Exit with exit code.
+
+CONFIGURATION FILE
+       Options can be set via configuration file using the INI format. tio uses the configuration file first found in the following locations in the order listed:
+
+       $XDG_CONFIG_HOME/tio/config
+
+       $HOME/.config/tio/config
+
+       $HOME/.tioconfig
+
+       Labels can be used to group settings into named configuration profiles which can be activated from the command-line when starting tio.
+
+       tio will try to match the user input to a configuration profile by name or by pattern to get the TTY device and other options.
+
+       Options without any label change the default options.
+
+       Any options set via command-line will override options set in the configuration file.
+
+       The following configuration file options are available:
+
+       pattern                  Pattern matching user input. This pattern can be an extended regular expression with a single group.
+
+       device                   TTY device to open. If it contains a "%s" it is substituted with the first group match.
+
+       baudrate                 Set baud rate
+
+       databits                 Set data bits
+
+       flow                     Set flow control
+
+       stopbits                 Set stop bits
+
+       parity                   Set parity
+
+       output-delay             Set output character delay
+
+       output-line-delay        Set output line delay
+
+       line-pulse-duration      Set line pulse duration
+
+       no-reconnect             Do not reconnect
+
+       log                      Enable log to file
+
+       log-file                 Set log filename
+
+       log-directory            Set log directory path in which to save automatically named log files.
+
+       log-append               Append to log file
+
+       log-strip                Enable strip of control and escape sequences from log
+
+       local-echo               Enable local echo
+
+       timestamp                Enable line timestamp
+
+       timestamp-format         Set timestamp format
+
+       timestamp-timeout        Set timestamp timeout
+
+       map                      Map characters on input or output
+
+       color                    Colorize tio text using ANSI color code ranging from 0 to 255
+
+       input-mode               Set input mode
+
+       output-mode              Set output mode
+
+       socket                   Set socket to redirect I/O to
+
+       prefix-ctrl-key          Set prefix ctrl key (a..z or 'none', default: t)
+
+       rs-485                   Enable RS-485 mode
+
+       rs-485-config            Set RS-485 configuration
+
+       alert                    Set alert action on connect/disconnect
+
+       mute                     Mute tio messages
+
+       script                   Run script from string
+
+       script-file              Run script from file
+
+       script-run               Run script on connect
+
+       exec                     Execute shell command with I/O redirected to device
+
+       It is possible to include the content of other configuration files using the include directive like so: "[include <file>]".
+
+CONFIGURATION FILE EXAMPLES
+       To change the default configuration simply set options like so:
+
+              [default]
+              baudrate = 9600
+              databits = 8
+              parity = none
+              stopbits = 1
+              color = 10
+              line-pulse-duration = DTR=200,RTS=400
+
+       Named configuration profiles can be added via labels:
+
+              [rpi3]
+              device = /dev/serial/by-id/usb-FTDI_TTL232R-3V3_FTGQVXBL-if00-port0
+              baudrate = 115200
+              color = 11
+
+       Activate the configuration profile by name:
+
+              $ tio rpi3
+
+       Which is equivalent to:
+
+              $ tio -b 115200 -c 11 /dev/serial/by-id/usb-FTDI_TTL232R-3V3_FTGQVXBL-if00-port0
+
+       A configuration profile can also be activated by its pattern which supports regular expressions:
+
+              [usb-devices]
+              pattern = ^usb([0-9]*)
+              device = /dev/ttyUSB%m1
+              baudrate = 115200
+
+       Activate the configuration profile by pattern match:
+
+              $ tio usb12
+
+       Which becomes equivalent to:
+
+              $ tio -b 115200 /dev/ttyUSB12
+
+       It is also possible to combine use of configuration profile and command-line options. For example:
+
+              $ tio -l -t usb12
+
+EXAMPLES
+       Typical use is without options:
+
+              $ tio /dev/ttyUSB0
+
+       Which corresponds to the commonly used default options:
+
+              $ tio -b 115200 -d 8 -f none -s 1 -p none /dev/ttyUSB0
+
+       It is recommended to connect serial TTY devices by ID:
+
+              $ tio /dev/serial/by-id/usb-FTDI_TTL232R-3V3_FTGQVXBL-if00-port0
+
+       Using serial devices by ID ensures that tio automatically reconnects to the correct serial device if it is disconnected and then reconnected.
+
+       Redirect serial device I/O to Unix file socket for scripting:
+
+              $ tio -S unix:/tmp/tio-socket0 /dev/ttyUSB0
+
+       Then, to issue a command via the file socket simply do:
+
+              $ echo "ls -la" | nc -UN /tmp/tio-socket0 > /dev/null
+
+       Or use the expect command to script an interaction:
+
+              #!/usr/bin/expect -f
+
+              set timeout -1
+              log_user 0
+
+              spawn nc -UN /tmp/tio-socket0
+              set uart $spawn_id
+
+              send -i $uart "date\n"
+              expect -i $uart "prompt> "
+              send -i $uart "ls -la\n"
+              expect -i $uart "prompt> "
+
+       It is also possible to use tio's own simpler expect/send script functionality to e.g. automate logins:
+
+              $ tio --script 'expect("login: "); write("root\n"); expect("Password: "); write("root\n")' /dev/ttyUSB0
+
+       Redirect device I/O to network file socket for remote TTY sharing:
+
+              $ tio --socket inet:4444 /dev/ttyUSB0
+
+       Then, use netcat to connect to the shared TTY session over network (assuming tio is hosted on IP 10.0.0.42):
+
+              $ nc -N 10.0.0.42 4444
+
+       Pipe command to the serial device:
+
+              $ echo "ls -la" | tio /dev/serial/by-id/usb-FTDI_TTL232R-3V3_FTGQVXBL-if00-port0
+
+       Pipe command to serial device and wait for line response within 1 second:
+
+              $ echo "*IDN?" | tio /dev/ttyACM0 --script "expect('\r\n', 1000)" --mute
+
+       Likewise, to pipe data from file to the serial device:
+
+              $ cat data.bin | tio /dev/serial/by-id/usb-FTDI_TTL232R-3V3_FTGQVXBL-if00-port0
+
+       Map NL to CR-NL on input from device and DEL to BS on output to device:
+
+              $ tio --map INLCRNL,ODELBS /dev/ttyUSB0
+
+       Enable RS-485 mode:
+
+              $ tio --rs-485 --rs-485-config=RTS_ON_SEND=1,RX_DURING_TX /dev/ttyUSB0
+
+       Manipulate DTR and RTS lines upon first connect to reset connected microcontroller:
+
+              $ tio --script "set{DTR=high,RTS=low}; msleep(100); set{RTS=toggle}" --script-run once /dev/ttyUSB0
+
+WEBSITE
+       Visit https://tio.github.io
+
+AUTHOR
+       Maintained by Martin Lund <martin.lund@keep-it-simple.com>.
+
+tio 3.9                                                                                                          2025-04-13                                                                                                          tio(1)

meson.build

@@ -1,12 +1,12 @@
 project('tio', 'c',
-    version : '1.40',
-    license : [ 'GPL-2'],
+    version : '3.9',
+    license : 'GPL-2.0-or-later',
     meson_version : '>= 0.53.2',
     default_options : [ 'warning_level=2', 'buildtype=release', 'c_std=gnu99' ]
 )
 
 # The tag date of the project_version(), update when the version bumps.
-version_date = '2022-06-17'
+version_date = '2025-04-13'
 
 # Test for dynamic baudrate configuration interface
 compiler = meson.get_compiler('c')
@@ -71,5 +71,17 @@ foreach rate : test_baudrates
   endif
 endforeach
 
+# Test for RS-485 support on Linux
+enable_rs485 = false
+if host_machine.system() == 'linux'
+  if compiler.check_header('linux/serial.h')
+    enable_rs485 = compiler.has_header_symbol('sys/ioctl.h', 'TIOCSRS485')
+  endif
+endif
+
 subdir('src')
-subdir('man')
+
+install_man_pages = get_option('install_man_pages')
+if install_man_pages
+  subdir('man')
+endif

meson_options.txt

@@ -1,3 +1,6 @@
 option('bashcompletiondir',
        type : 'string',
        description : 'Directory for bash completion scripts ["no" disables]')
+option('install_man_pages',
+       type : 'boolean', value: true,
+       description : 'Install man pages')

src/alert.c

@@ -0,0 +1,83 @@
+/*
+ * tio - a serial device I/O tool
+ *
+ * Copyright (c) 2014-2022  Martin Lund
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA.
+ */
+
+#include <stdio.h>
+#include <unistd.h>
+#include "options.h"
+#include "alert.h"
+
+void blink_background(void)
+{
+    // Turn on reverse video
+    printf("\e[?5h");
+    fflush(stdout);
+
+    usleep(200*1000);
+
+    // Turn on normal video
+    printf("\e[?5l");
+    fflush(stdout);
+}
+
+void sound_bell(void)
+{
+    // Audio bell
+    printf("\a");
+    fflush(stdout);
+}
+
+void alert_connect(void)
+{
+    switch (option.alert)
+    {
+        case ALERT_NONE:
+            break;
+        case ALERT_BELL:
+            sound_bell();
+            break;
+        case ALERT_BLINK:
+            blink_background();
+            break;
+        default:
+            break;
+    }
+}
+
+void alert_disconnect(void)
+{
+    switch (option.alert)
+    {
+        case ALERT_NONE:
+            break;
+        case ALERT_BELL:
+            sound_bell();
+            usleep(200*1000);
+            sound_bell();
+            break;
+        case ALERT_BLINK:
+            blink_background();
+            usleep(200*1000);
+            blink_background();
+            break;
+        default:
+            break;
+    }
+}

src/alert.h

@@ -0,0 +1,33 @@
+/*
+ * tio - a serial device I/O tool
+ *
+ * Copyright (c) 2014-2022  Martin Lund
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA.
+ */
+
+#pragma once
+
+typedef enum
+{
+    ALERT_NONE,
+    ALERT_BELL,
+    ALERT_BLINK,
+    ALERT_END,
+} alert_t;
+
+void alert_connect(void);
+void alert_disconnect(void);

src/bash-completion/tio.in

@@ -16,18 +16,37 @@ _tio()
           -s --stopbits \
           -p --parity \
           -o --output-delay \
-          -n --no-autoconnect \
+          -o --output-line-delay \
+             --line-pulse-duration \
+          -a --auto-connect \
+             --exclude-devices \
+             --exclude-drivers \
+             --exclude-tids \
+          -n --no-reconnect \
           -e --local-echo \
           -l --log \
              --log-file \
+             --log-directory \
+             --log-append \
              --log-strip \
           -m --map \
           -t --timestamp \
              --timestamp-format \
-          -L --list-devices \
+             --timestamp-timeout \
+          -L --list \
           -c --color \
           -S --socket \
-          -x --hex-mode \
+             --input-mode \
+             --output-mode \
+             --rs-485 \
+             --rs-485-config \
+             --alert \
+             --mute \
+             --script \
+             --script-file \
+             --script-run \
+             --exec \
+             --complete-profiles \
           -v --version \
           -h --help"
 
@@ -55,43 +74,23 @@ _tio()
             return 0
             ;;
         -o | --output-delay)
-            COMPREPLY=( $(compgen -W "0 1 10 100" -- ${cur}) )
+            COMPREPLY=( $(compgen -W "1 10 100" -- ${cur}) )
             return 0
             ;;
-        -n | --no-autoconnect)
-            COMPREPLY=( $(compgen -W "${opts}" -- ${cur}) )
+        -O | --output-line-delay)
+            COMPREPLY=( $(compgen -W "1 10 100" -- ${cur}) )
             return 0
             ;;
-        -e | --local-echo)
-            COMPREPLY=( $(compgen -W "${opts}" -- ${cur}) )
-            return 0
-            ;;
-        -l | --log)
-            COMPREPLY=( $(compgen -W "${opts}" -- ${cur}) )
-            return 0
-            ;;
-        -l | --log-file)
-            COMPREPLY=( $(compgen -W "${opts}" -- ${cur}) )
-            return 0
-            ;;
-        -l | --log-strip)
-            COMPREPLY=( $(compgen -W "${opts}" -- ${cur}) )
+        -a | --auto-connect)
+            COMPREPLY=( $(compgen -W "new latest none" -- ${cur}) )
             return 0
             ;;
         -m | --map)
-            COMPREPLY=( $(compgen -W "ICRNL IGNCR INLCR INLCRNL OCRNL ODELBS ONLCRNL" -- ${cur}) )
-            return 0
-            ;;
-        -t | --timestamp)
-            COMPREPLY=( $(compgen -W "${opts}" -- ${cur}) )
+            COMPREPLY=( $(compgen -W "ICRNL IGNCR INLCR IFFESCC INLCRNL ICRCRNL IMSB2LSB OCRNL ODELBS ONLCRNL OLTU ONULBRK OIGNCR" -- ${cur}) )
             return 0
             ;;
         --timestamp-format)
-            COMPREPLY=( $(compgen -W "24hour 24hour-start iso8601" -- ${cur}) )
-            return 0
-            ;;
-        -L | --list-devices)
-            COMPREPLY=( $(compgen -W "${opts}" -- ${cur}) )
+            COMPREPLY=( $(compgen -W "24hour 24hour-start 24hour-delta iso8601 epoch epoch-usec" -- ${cur}) )
             return 0
             ;;
         -c | --color)
@@ -102,16 +101,24 @@ _tio()
             COMPREPLY=( $(compgen -W "unix: inet: inet6:" -- ${cur}) )
             return 0
             ;;
-        -x | --hex-mode)
-            COMPREPLY=( $(compgen -W "${opts}" -- ${cur}) )
+        --input-mode)
+            COMPREPLY=( $(compgen -W "normal hex line"  -- ${cur}) )
             return 0
             ;;
-        -v | --version)
-            COMPREPLY=( $(compgen -W "${opts}" -- ${cur}) )
+        --output-mode)
+            COMPREPLY=( $(compgen -W "normal hex"  -- ${cur}) )
             return 0
             ;;
-        -h | --help)
-            COMPREPLY=( $(compgen -W "${opts}" -- ${cur}) )
+        --rs-485-config)
+            COMPREPLY=( $(compgen -W "RTS_ON_SEND RTS_AFTER_SEND RTS_DELAY_BEFORE_SEND RTS_DELAY_AFTER_SEND RX_DURING_TX"  -- ${cur}) )
+            return 0
+            ;;
+        --alert)
+            COMPREPLY=( $(compgen -W "none bell blink"  -- ${cur}) )
+            return 0
+            ;;
+        --script-run)
+            COMPREPLY=( $(compgen -W "once always never"  -- ${cur}) )
             return 0
             ;;
         *)
@@ -124,12 +131,14 @@ _tio()
             ;;
     esac
 
+    profiles="`tio --complete-profiles`"
+
     if [ -d /dev/serial/by-id ]; then
         ttys=$(printf '%s\n' /dev/tty* /dev/serial/by-id/*)
     else
         ttys=$(printf '%s\n' /dev/tty*)
     fi
-    COMPREPLY=( $(compgen -W "${ttys}" -- ${cur}) )
+    COMPREPLY=( $(compgen -W "${ttys} ${profiles}" -- ${cur}) )
     return 0
 }
 

src/configfile.h

@@ -1,5 +1,5 @@
 /*
- * tio - a simple serial terminal I/O tool
+ * tio - a serial device I/O tool
  *
  * Copyright (c) 2020  Liam Beguin
  * Copyright (c) 2022  Martin Lund
@@ -24,20 +24,15 @@
 
 struct config_t
 {
-	const char *user;
-
-	char *path;
-	char *section_name;
-	char *match;
-
-	char *tty;
-	char *flow;
-	char *parity;
-	char *log_filename;
-	char *socket;
-	char *map;
+    char *path;
+    char *active_group;
+    char *device;
 };
 
+extern struct config_t config;
+
 void config_file_print(void);
 void config_file_parse(void);
 void config_exit(void);
+void config_file_show_profiles(void);
+void config_list_targets(void);

src/error.c

@@ -1,5 +1,5 @@
 /*
- * tio - a simple serial terminal I/O tool
+ * tio - a serial device I/O tool
  *
  * Copyright (c) 2014-2022  Martin Lund
  *
@@ -19,27 +19,79 @@
  * 02110-1301, USA.
  */
 
-#include "config.h"
+#define _GNU_SOURCE    // To access vasprintf
 #include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <errno.h>
-#include "options.h"
 #include "print.h"
-#include "error.h"
 
-char error[2][1000];
+static char error[2][1000];
+static bool in_session = false;
+bool error_normal = true;
+
+void switch_error_output_mode(void)
+{
+    error_normal = false;
+}
+
+void error_enter_session_mode(void)
+{
+    in_session = true;
+}
+
+void error_printf_(const char *format, ...)
+{
+    va_list args;
+    char *line;
+
+    va_start(args, format);
+    vasprintf(&line, format, args);
+
+    if (in_session)
+    {
+        if (print_tainted)
+        {
+            putchar('\n');
+        }
+        ansi_error_printf("[%s] %s", timestamp_current_time(), line);
+    }
+    else
+    {
+        fprintf(stderr, "%s\n", line);
+    }
+
+    va_end(args);
+
+    print_tainted = false;
+    free(line);
+}
+
+void tio_error_printf(const char *format, ...)
+{
+    va_list args;
+
+    va_start(args, format);
+    vsnprintf(error[0], 1000, format, args);
+    va_end(args);
+}
+
+void tio_error_printf_silent(const char *format, ...)
+{
+    va_list args;
+
+    va_start(args, format);
+    vsnprintf(error[1], 1000, format, args);
+    va_end(args);
+}
 
 void error_exit(void)
 {
-  if (error[0][0] != 0)
-  {
-    /* Print error */
-    tio_error_printf("Error: %s", error[0]);
-  }
-  else if ((error[1][0] != 0) && (option.no_autoconnect))
-  {
-    /* Print silent error */
-    tio_error_printf("Error: %s", error[1]);
-  }
+    if (error[0][0] != 0)
+    {
+        /* Print error */
+        error_printf_("Error: %s", error[0]);
+    }
+    else if ((error[1][0] != 0) && (option.no_reconnect))
+    {
+        /* Print silent error */
+        error_printf_("Error: %s", error[1]);
+    }
 }

src/error.h

@@ -1,5 +1,5 @@
 /*
- * tio - a simple serial terminal I/O tool
+ * tio - a serial device I/O tool
  *
  * Copyright (c) 2014-2022  Martin Lund
  *
@@ -21,9 +21,15 @@
 
 #pragma once
 
+#include <stdbool.h>
+
+extern bool error_normal;
+
 #define TIO_SUCCESS 0
 #define TIO_ERROR   1
 
-extern char error[2][1000];
-
+void tio_error_printf(const char *format, ...);
+void tio_error_printf_silent(const char *format, ...);
 void error_exit(void);
+void error_enter_session_mode(void);
+void switch_error_output_mode(void);

src/fs.c

@@ -0,0 +1,226 @@
+/*
+ * tio - a serial device I/O tool
+ *
+ * Copyright (c) 2014-2024  Martin Lund
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA.
+ */
+
+#define _GNU_SOURCE  // For statx()
+#include "config.h"
+#include <dirent.h>
+#include <fcntl.h>
+#include <regex.h>
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+#include <sys/stat.h>
+#include <time.h>
+#include <errno.h>
+#include <poll.h>
+#include <termios.h>
+#include "error.h"
+#include "print.h"
+#include "options.h"
+
+bool fs_dir_exists(const char *path)
+{
+    struct stat st;
+
+    if (stat(path, &st) != 0)
+    {
+        return false;
+    }
+    else if (!S_ISDIR(st.st_mode))
+    {
+        return false;
+    }
+
+    return true;
+}
+
+// Function to read the content of a file but stripped of newline
+ssize_t fs_read_file_stripped(char *buf, size_t bufsiz, const char *format, ...)
+{
+    char filename[PATH_MAX];
+    int bytes_printed = 0;
+    va_list args;
+
+    va_start(args, format);
+    bytes_printed = vsnprintf(filename, sizeof(filename), format, args);
+    va_end(args);
+
+    if (bytes_printed < 0)
+    {
+        return -1;
+    }
+
+    FILE *file = fopen(filename, "r");
+    if (!file)
+    {
+        return -1;
+    }
+    ssize_t length = fread(buf, 1, bufsiz - 1, file);
+    if (length == -1)
+    {
+        fclose(file);
+        return -1;
+    }
+
+    // Strip any newline
+    buf[strcspn(buf, "\n")] = 0;
+    buf[length] = '\0'; // Make sure to null-terminate the string
+
+    fclose(file);
+
+    return length;
+}
+
+bool fs_file_exists(const char *format, ...)
+{
+    char filename[PATH_MAX];
+    int bytes_printed = 0;
+    struct stat st;
+    va_list args;
+
+    va_start(args, format);
+    bytes_printed = vsnprintf(filename, sizeof(filename), format, args);
+    va_end(args);
+
+    if (bytes_printed < 0)
+    {
+        return false;
+    }
+
+    return stat(filename, &st) == 0;
+}
+
+char* fs_search_directory(const char *dir_path, const char *dirname)
+{
+    struct dirent *entry;
+    char path[PATH_MAX];
+    struct stat st;
+    DIR *dir;
+
+    if ((dir = opendir(dir_path)) == NULL)
+    {
+        // Error opening directory
+        return NULL;
+    }
+
+    while ((entry = readdir(dir)) != NULL)
+    {
+        snprintf(path, PATH_MAX, "%s/%s", dir_path, entry->d_name);
+
+        if (strcmp(entry->d_name, ".") == 0 || strcmp(entry->d_name, "..") == 0)
+        {
+            continue;
+        }
+
+        if (lstat(path, &st) == -1)
+        {
+            // Error getting directory status
+            closedir(dir);
+            return NULL;
+        }
+
+        if (S_ISLNK(st.st_mode))
+        {
+            // Skip symbolic links
+            continue;
+        }
+
+        if (S_ISDIR(st.st_mode))
+        {
+            // If it's a directory, check if it's the one we're looking for
+            if (strcmp(entry->d_name, dirname) == 0)
+            {
+                char *result = strndup(path, PATH_MAX);
+                closedir(dir);
+                return result;
+            }
+            else
+            {
+                // Recursively search within directories
+                char* result = fs_search_directory(path, dirname);
+                if (result != NULL)
+                {
+                    closedir(dir);
+                    return result;
+                }
+            }
+        }
+    }
+
+    closedir(dir);
+    return NULL;
+}
+
+#if defined(__linux__) && defined(STATX_BTIME)
+
+// Function to return creation time of file
+double fs_get_creation_time(const char *path)
+{
+    struct statx stx;
+    int fd = open(path, O_RDONLY);
+    if (fd == -1)
+    {
+        return -1;
+    }
+
+    if (statx(fd, "", AT_EMPTY_PATH, STATX_ALL, &stx) != 0)
+    {
+        close(fd);
+        return -1;
+    }
+
+    // Close the file
+    close(fd);
+
+    return stx.stx_btime.tv_sec + stx.stx_btime.tv_nsec / 1e9;
+}
+
+#elif defined(__APPLE__) || defined(__MACH__)
+
+double fs_get_creation_time(const char *path)
+{
+    struct stat st;
+
+    if (stat(path, &st) != 0)
+    {
+        return -1;
+    }
+
+    return st.st_mtimespec.tv_sec + st.st_mtimespec.tv_nsec / 1e9;
+}
+
+#else
+
+double fs_get_creation_time(const char *path)
+{
+    struct stat st;
+
+    if (stat(path, &st) != 0)
+    {
+        return -1;
+    }
+
+    return (double) st.st_ctime;
+}
+
+#endif

src/fs.h

@@ -0,0 +1,31 @@
+/*
+ * tio - a serial device I/O tool
+ *
+ * Copyright (c) 2014-2024  Martin Lund
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA.
+ */
+
+#pragma once
+
+#include <stdbool.h>
+#include <stdio.h>
+
+bool fs_dir_exists(const char *path);
+bool fs_file_exists(const char *format, ...);
+char* fs_search_directory(const char *dir_path, const char *dirname);
+ssize_t fs_read_file_stripped(char *buf, size_t bufsiz, const char *format, ...);
+double fs_get_creation_time(const char *path);

src/log.c

@@ -1,5 +1,5 @@
 /*
- * tio - a simple serial terminal I/O tool
+ * tio - a serial device I/O tool
  *
  * Copyright (c) 2014-2022  Martin Lund
  *
@@ -19,24 +19,20 @@
  * 02110-1301, USA.
  */
 
-#include "config.h"
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <errno.h>
-#include <time.h>
+#define _GNU_SOURCE // To access vasprintf
 #include <sys/time.h>
 #include <libgen.h>
-#include "options.h"
+#include <errno.h>
 #include "print.h"
-#include "error.h"
+#include "fs.h"
 
 #define IS_ESC_CSI_INTERMEDIATE_CHAR(c) ((c >= 0x20) && (c <= 0x3F))
 #define IS_ESC_END_CHAR(c)              ((c >= 0x30) && (c <= 0x7E))
 #define IS_CTRL_CHAR(c)                 ((c >= 0x00) && (c <= 0x1F))
 
-static FILE *fp;
-static bool log_error = false;
+static FILE *fp = NULL;
+static char file_buffer[BUFSIZ];
+static const char *log_filename = NULL;
 
 static char *date_time(void)
 {
@@ -52,26 +48,68 @@ static char *date_time(void)
     return date_time_string;
 }
 
-void log_open(const char *filename)
+int log_open(const char *filename)
 {
-    static char automatic_filename[400];
+    char *automatic_filename;
+    char *dir_plus_automatic_filename;
 
     if (filename == NULL)
     {
-        // Generate filename if none provided ("tio_DEVICE_YYYY-MM-DDTHH:MM:SS.log")
-        sprintf(automatic_filename, "tio_%s_%s.log", basename((char *)option.tty_device), date_time());
-        filename = automatic_filename;
-        option.log_filename = automatic_filename;
+        // Generate filename if none provided
+        if (option.auto_connect == AUTO_CONNECT_DIRECT)
+        {
+            // File name format ("tio_TARGET_YYYY-MM-DDTHH:MM:SS.log")
+            asprintf(&automatic_filename, "tio_%s_%s.log", basename((char *)option.target), date_time());
+        }
+        else
+        {
+          // If using 'new' or 'latest' autoconnect strategy we simply use strategy
+          // name to name autogenerated log name as device names may vary
+          asprintf(&automatic_filename, "tio_%s_%s.log",
+                   option_auto_connect_state_to_string(option.auto_connect),
+                   date_time());
+        }
+
+        if (option.log_directory != NULL)
+        {
+            if (fs_dir_exists(option.log_directory) == false)
+            {
+                tio_error_printf("Log directory not found");
+                exit(EXIT_FAILURE);
+            }
+
+            asprintf(&dir_plus_automatic_filename, "%s/%s", option.log_directory, automatic_filename);
+            filename = dir_plus_automatic_filename;
+        }
+        else
+        {
+            filename = automatic_filename;
+        }
     }
 
-    fp = fopen(filename, "a+");
+    log_filename = filename;
 
+    // Open log file
+    if (option.log_append)
+    {
+        // Append to existing log file
+        fp = fopen(filename, "a+");
+    }
+    else
+    {
+        // Truncate existing log file
+        fp = fopen(filename, "w+");
+    }
     if (fp == NULL)
     {
-        log_error = true;
-        exit(EXIT_FAILURE);
+        tio_warning_printf("Could not open log file %s (%s)", filename, strerror(errno));
+        return -1;
     }
-    setvbuf(fp, NULL, _IONBF, 0);
+
+    // Enable line buffering
+    setvbuf(fp, file_buffer, _IOLBF, BUFSIZ);
+
+    return 0;
 }
 
 bool log_strip(char c)
@@ -133,13 +171,41 @@ bool log_strip(char c)
     return strip;
 }
 
-void log_write(char c)
+void log_printf(const char *format, ...)
 {
-    if (fp != NULL)
+    if (fp == NULL)
+    {
+        return;
+    }
+
+    char *line;
+
+    va_list(args);
+    va_start(args, format);
+    vasprintf(&line, format, args);
+    va_end(args);
+
+    fwrite(line, strlen(line), 1, fp);
+
+    free(line);
+}
+
+void log_putc(char c)
+{
+    if (fp == NULL)
+    {
+        return;
+    }
+
+    if (option.output_mode == OUTPUT_MODE_HEX)
+    {
+        fprintf(fp, "%02x ", (unsigned char) c);
+    }
+    else
     {
         if (option.log_strip)
         {
-            if (!log_strip(c))
+            if (log_strip(c) == false)
             {
                 fputc(c, fp);
             }
@@ -156,22 +222,21 @@ void log_close(void)
     if (fp != NULL)
     {
         fclose(fp);
+        tio_printf("Saved log to file %s", log_filename);
+        fp = NULL;
+        log_filename = NULL;
     }
 }
 
 void log_exit(void)
 {
-    if (option.log)
+    if ((option.log) && (log_filename != NULL))
     {
         log_close();
     }
-
-    if (log_error)
-    {
-        error_printf("Could not open log file %s (%s)", option.log_filename, strerror(errno));
-    }
-    else if (option.log)
-    {
-        tio_printf("Saved log to file %s", option.log_filename);
-    }
+}
+
+const char *log_get_filename(void)
+{
+    return log_filename;
 }

src/log.h

@@ -1,5 +1,5 @@
 /*
- * tio - a simple serial terminal I/O tool
+ * tio - a serial device I/O tool
  *
  * Copyright (c) 2014-2022  Martin Lund
  *
@@ -21,7 +21,9 @@
 
 #pragma once
 
-void log_open(const char *filename);
-void log_write(char c);
+int log_open(const char *filename);
+void log_printf(const char *format, ...);
+void log_putc(char c);
 void log_close(void);
 void log_exit(void);
+const char * log_get_filename(void);

src/main.c

@@ -1,5 +1,5 @@
 /*
- * tio - a simple serial terminal I/O tool
+ * tio - a serial device I/O tool
  *
  * Copyright (c) 2014-2022  Martin Lund
  *
@@ -19,10 +19,11 @@
  * 02110-1301, USA.
  */
 
-#include "config.h"
 #include <stdio.h>
 #include <stdlib.h>
 #include <unistd.h>
+#include "version.h"
+#include "config.h"
 #include "options.h"
 #include "configfile.h"
 #include "tty.h"
@@ -45,6 +46,12 @@ int main(int argc, char *argv[])
     /* Parse command-line options (1st pass) */
     options_parse(argc, argv);
 
+    if (option.complete_profiles)
+    {
+        config_file_show_profiles();
+        return status;
+    }
+
     /* Parse configuration file */
     config_file_parse();
 
@@ -54,6 +61,10 @@ int main(int argc, char *argv[])
     /* Configure tty device */
     tty_configure();
 
+    /* Disable line buffering in stdout. This is necessary if we
+     * want things like local echo to work correctly. */
+    setvbuf(stdout, NULL, _IONBF, 0);
+
     /* Configure input terminal */
     if (isatty(fileno(stdin)))
     {
@@ -65,6 +76,9 @@ int main(int argc, char *argv[])
         interactive_mode = false;
     }
 
+    /* Switch error output format */
+    switch_error_output_mode();
+
     /* Configure output terminal */
     if (isatty(fileno(stdout)))
     {
@@ -88,11 +102,18 @@ int main(int argc, char *argv[])
     /* Initialize ANSI text formatting (colors etc.) */
     print_init_ansi_formatting();
 
+    /* Change error printing mode */
+    error_enter_session_mode();
+
     /* Print launch hints */
-    tio_printf("tio v%s", VERSION);
+    tio_printf("tio %s", VERSION);
     if (interactive_mode)
     {
-        tio_printf("Press ctrl-t q to quit");
+        tio_printf("Press ctrl-%c q to quit", option.prefix_key);
+    } else
+    {
+        tio_printf("Non-interactive mode enabled");
+        tio_printf("Press ctrl-c to quit");
     }
 
     /* Open socket */
@@ -101,9 +122,16 @@ int main(int argc, char *argv[])
         socket_configure();
     }
 
+    /* Spawn input handling into separate thread */
+    tty_input_thread_create();
+
+    /* Wait for input to be ready */
+    tty_input_thread_wait_ready();
+
     /* Connect to tty device */
-    if ((option.no_autoconnect) || (!interactive_mode))
+    if (option.no_reconnect)
     {
+        tty_search();
         status = tty_connect();
     }
     else
@@ -112,7 +140,7 @@ int main(int argc, char *argv[])
         while (true)
         {
             tty_wait_for_device();
-            status = tty_connect();
+            tty_connect();
         }
     }
 

src/meson.build

@@ -1,5 +1,10 @@
+# Generate version header
+version_h = vcs_tag(command : ['git', 'describe', '--tags', '--always', '--dirty'],
+                        input : 'version.h.in',
+                        output :'version.h',
+                        replace_string:'@VERSION@')
+
 config_h = configuration_data()
-config_h.set_quoted('VERSION', meson.project_version())
 config_h.set('BAUDRATE_CASES', baudrate_cases)
 configure_file(output: 'config.h', configuration: config_h)
 
@@ -13,25 +18,55 @@ tio_sources = [
   'print.c',
   'configfile.c',
   'signals.c',
-  'socket.c'
+  'socket.c',
+  'setspeed.c',
+  'rs485.c',
+  'timestamp.c',
+  'alert.c',
+  'xymodem.c',
+  'script.c',
+  'fs.c',
+  'readline.c',
+  version_h
 ]
 
-tio_dep = dependency('inih', required: true,
-                     fallback : ['libinih', 'inih_dep'],
-                     default_options: ['default_library=static', 'distro_install=false'])
 
-tio_c_args = ['-Wno-unused-result']
+foreach name: ['lua-5.4', 'lua-5.3', 'lua-5.2', 'lua-5.1', 'lua']
+  lua_dep = dependency(name, version: '>=5.1', required: false)
+  if lua_dep.found()
+    break
+  endif
+endforeach
+if not lua_dep.found()
+  error('Lua could not be found!')
+endif
+
+tio_dep = [
+  dependency('threads', required: true),
+  dependency('glib-2.0', required: true),
+  lua_dep
+]
+
+if host_machine.system() == 'darwin'
+  iokit_dep = dependency('appleframeworks', modules: ['IOKit'], required: true)
+  corefoundation_dep = dependency('appleframeworks', modules: ['CoreFoundation'], required: true)
+  tio_dep += [iokit_dep, corefoundation_dep]
+endif
+
+tio_c_args = ['-Wshadow','-Wno-unused-result']
 
 if enable_setspeed2
-  tio_sources += 'setspeed2.c'
   tio_c_args += '-DHAVE_TERMIOS2'
 endif
 
 if enable_iossiospeed
-  tio_sources += 'iossiospeed.c'
   tio_c_args += '-DHAVE_IOSSIOSPEED'
 endif
 
+if enable_rs485
+  tio_c_args += '-DHAVE_RS485'
+endif
+
 executable('tio',
   tio_sources,
   c_args: tio_c_args,

src/misc.c

@@ -1,5 +1,5 @@
 /*
- * tio - a simple serial terminal I/O tool
+ * tio - a serial device I/O tool
  *
  * Copyright (c) 2014-2022  Martin Lund
  *
@@ -19,92 +19,235 @@
  * 02110-1301, USA.
  */
 
-#include "config.h"
-#include <stdio.h>
-#include <stdlib.h>
+#define _GNU_SOURCE  // For FNM_EXTMATCH
+#include <unistd.h>
 #include <string.h>
-#include <time.h>
-#include <sys/time.h>
+#include <poll.h>
+#include <sys/wait.h>
+#include <fnmatch.h>
+#include <regex.h>
 #include <errno.h>
-#include "error.h"
 #include "print.h"
-#include "options.h"
-
-#define TIME_STRING_SIZE_MAX 24
-
-char *current_time(void)
-{
-    static char time_string[TIME_STRING_SIZE_MAX];
-    static struct timeval tv_start;
-    static bool first = true;
-    struct tm *tm;
-    struct timeval tv;
-    size_t len;
-
-    gettimeofday(&tv, NULL);
-
-    if (first)
-    {
-        tv_start = tv;
-        first = false;
-    }
-
-    // Add formatted timestap
-    switch (option.timestamp)
-    {
-        case TIMESTAMP_NONE:
-        case TIMESTAMP_24HOUR:
-            // "hh:mm:ss.sss" (24 hour format)
-            tm = localtime(&tv.tv_sec);
-            len = strftime(time_string, sizeof(time_string), "%H:%M:%S", tm);
-            break;
-        case TIMESTAMP_24HOUR_START:
-            // "hh:mm:ss.sss" (24 hour format relative to start time)
-            timersub(&tv, &tv_start, &tv);
-            tv.tv_sec -= 3600; // Why is this needed??
-            tm = localtime(&tv.tv_sec);
-            len = strftime(time_string, sizeof(time_string), "%H:%M:%S", tm);
-            break;
-        case TIMESTAMP_ISO8601:
-            // "YYYY-MM-DDThh:mm:ss.sss" (ISO-8601)
-            tm = localtime(&tv.tv_sec);
-            len = strftime(time_string, sizeof(time_string), "%Y-%m-%dT%H:%M:%S", tm);
-            break;
-        default:
-            return NULL;
-    }
-
-    // Append milliseconds to all timestamps
-    if (len)
-    {
-        len = snprintf(time_string + len, TIME_STRING_SIZE_MAX - len, ".%03ld", (long)tv.tv_usec / 1000);
-    }
-
-    return (len < TIME_STRING_SIZE_MAX) ? time_string : NULL;
-}
 
 void delay(long ms)
 {
     struct timespec ts;
 
+    if (ms <= 0)
+    {
+        return;
+    }
+
     ts.tv_sec = ms / 1000;
     ts.tv_nsec = (ms % 1000) * 1000000;
 
     nanosleep(&ts, NULL);
 }
 
-long string_to_long(char *string)
+int ctrl_key_code(unsigned char key)
 {
-    long result;
-    char *end_token;
-
-    errno = 0;
-    result = strtol(string, &end_token, 10);
-    if ((errno != 0) || (*end_token != 0))
+    if ((key >= 'a') && (key <= 'z'))
     {
-        printf("Error: Invalid digit\n");
+        return key & ~0x60;
+    }
+
+    return -1;
+}
+
+bool regex_match(const char *string, const char *pattern)
+{
+    regex_t regex;
+    int status;
+
+    if (regcomp(&regex, pattern, REG_EXTENDED | REG_NOSUB) != 0)
+    {
+        // No match
+        return false;
+    }
+
+    status = regexec(&regex, string, (size_t) 0, NULL, 0);
+    regfree(&regex);
+
+    if (status != 0)
+    {
+        // No match
+        return false;
+    }
+
+    // Match
+    return true;
+}
+
+int read_poll(int fd, void *data, size_t len, int timeout)
+{
+    struct pollfd fds;
+    int ret = 0;
+
+    fds.events = POLLIN;
+    fds.fd = fd;
+
+    /* Wait data available */
+    ret = poll(&fds, 1, timeout);
+    if (ret < 0)
+    {
+        tio_error_print("%s", strerror(errno));
+        return ret;
+    }
+    else if (ret > 0)
+    {
+        if (fds.revents & POLLIN)
+        {
+            // Read ready data
+            return read(fd, data, len);
+        }
+    }
+
+    /* Timeout */
+    return ret;
+}
+
+// Function to calculate djb2 hash of string
+unsigned long djb2_hash(const unsigned char *str)
+{
+    unsigned long hash = 5381;
+    int c;
+
+    while ((c = *str++))
+    {
+        hash = ((hash << 5) + hash) + c; // hash * 33 + c
+    }
+
+    return hash;
+}
+
+// Function to encode a number to base62
+void *base62_encode(unsigned long num, char *output)
+{
+    const char base62_chars[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789";
+    if (output == NULL)
+    {
+        tio_error_print("Memory allocation failed");
         exit(EXIT_FAILURE);
     }
 
-    return result;
+    for (int i = 0; i < 4; ++i)
+    {
+        output[i] = base62_chars[num % 62];
+        num /= 62;
+    }
+    output[4] = '\0';
+
+    return output;
+}
+
+// Function to return current time
+double get_current_time(void)
+{
+    struct timespec current_time_ts;
+
+    if (clock_gettime(CLOCK_REALTIME, &current_time_ts) == -1)
+    {
+        // Error
+        return -1;
+    }
+
+    return current_time_ts.tv_sec + current_time_ts.tv_nsec / 1e9;
+}
+
+bool match_patterns(const char *string, const char *patterns)
+{
+    char *pattern;
+    char *patterns_copy;
+
+    if ((string == NULL) || (patterns == NULL))
+    {
+        return false;
+    }
+
+    patterns_copy = strdup(patterns);
+
+    // Tokenize the patterns string using strtok
+    pattern = strtok(patterns_copy, ",");
+    while (pattern != NULL)
+    {
+        // Check if the string matches the current pattern
+        #ifdef FNM_EXTMATCH
+            if (fnmatch(pattern, string, FNM_EXTMATCH) == 0)
+        #else
+            if (fnmatch(pattern, string, 0) == 0)
+        #endif
+        {
+            free(patterns_copy);
+            return true;
+        }
+
+        // Move to the next pattern
+        pattern = strtok(NULL, ",");
+    }
+
+    free(patterns_copy);
+    return false;
+}
+
+// Function that forks subprocess, redirects its stdin and stdout to the
+// specified filedescriptor, and runs command.
+int execute_shell_command(int fd, const char *command)
+{
+    pid_t pid;
+    int status;
+
+    // Fork a child process
+    pid = fork();
+    if (pid == -1)
+    {
+        // Error occurred
+        tio_error_print("fork() failed (%s)", strerror(errno));
+        exit(EXIT_FAILURE);
+    }
+    else if (pid == 0)
+    {
+        // Child process
+
+        tio_printf("Executing shell command '%s'", command);
+
+        // Redirect stdout and stderr to the file descriptor
+        if (dup2(fd, STDOUT_FILENO) == -1 || dup2(fd, STDERR_FILENO) == -1)
+        {
+            tio_error_print("dup2() failed (%s)", strerror(errno));
+            exit(EXIT_FAILURE);
+        }
+
+        // Execute the shell command
+        execl("/bin/sh", "sh", "-c", command, (char *)NULL);
+
+        // If execlp() returns, it means an error occurred
+        perror("execlp");
+        tio_error_print("execlp() failed (%s)", strerror(errno));
+        exit(EXIT_FAILURE);
+    }
+    else
+    {
+        // Parent process
+
+        // Wait for the child process to finish
+        waitpid(pid, &status, 0);
+
+        if (WIFEXITED(status))
+        {
+            tio_printf("Command exited with status %d", WEXITSTATUS(status));
+            return WEXITSTATUS(status);
+        }
+        else
+        {
+            tio_error_printf("Child process exited abnormally\n");
+            return -1;
+        }
+    }
+
+    return 0;
+}
+
+void clear_line()
+{
+    print("\r\033[K");
 }

src/misc.h

@@ -1,5 +1,5 @@
 /*
- * tio - a simple serial terminal I/O tool
+ * tio - a serial device I/O tool
  *
  * Copyright (c) 2014-2022  Martin Lund
  *
@@ -20,8 +20,19 @@
  */
 
 #pragma once
+
+#include <stdbool.h>
+#include <stdio.h>
+
 #define UNUSED(expr) do { (void)(expr); } while (0)
 
-char * current_time(void);
 void delay(long ms);
-long string_to_long(char *string);
+int ctrl_key_code(unsigned char key);
+bool regex_match(const char *string, const char *pattern);
+unsigned long djb2_hash(const unsigned char *str);
+void *base62_encode(unsigned long num, char *output);
+int read_poll(int fd, void *data, size_t len, int timeout);
+double get_current_time(void);
+bool match_patterns(const char *string, const char *patterns);
+int execute_shell_command(int fd, const char *command);
+void clear_line();

src/options.h

@@ -1,5 +1,5 @@
 /*
- * tio - a simple serial terminal I/O tool
+ * tio - a serial device I/O tool
  *
  * Copyright (c) 2014-2022  Martin Lund
  *
@@ -21,43 +21,91 @@
 
 #pragma once
 
+#include <stdint.h>
 #include <stdbool.h>
-#include <limits.h>
-#include <termios.h>
-#include <sys/param.h>
+#include "script.h"
+#include "timestamp.h"
+#include "alert.h"
+#include "tty.h"
 
-enum timestamp_t
+typedef enum
 {
-    TIMESTAMP_NONE,
-    TIMESTAMP_24HOUR,
-    TIMESTAMP_24HOUR_START,
-    TIMESTAMP_ISO8601,
-    TIMESTAMP_END,
-};
+    INPUT_MODE_NORMAL,
+    INPUT_MODE_HEX,
+    INPUT_MODE_LINE,
+    INPUT_MODE_END,
+} input_mode_t;
 
-const char* timestamp_token(enum timestamp_t timestamp);
-enum timestamp_t timestamp_option_parse(const char *arg);
+typedef enum
+{
+    OUTPUT_MODE_NORMAL,
+    OUTPUT_MODE_HEX,
+    OUTPUT_MODE_END,
+} output_mode_t;
 
 /* Options */
 struct option_t
 {
-    const char *tty_device;
-    unsigned int baudrate;
+    char *target;
+    int baudrate;
     int databits;
-    char *flow;
+    flow_t flow;
     int stopbits;
-    char *parity;
+    parity_t parity;
     int output_delay;
-    bool no_autoconnect;
+    int output_line_delay;
+    int dtr_pulse_duration;
+    int rts_pulse_duration;
+    int cts_pulse_duration;
+    int dsr_pulse_duration;
+    int dcd_pulse_duration;
+    int ri_pulse_duration;
+    bool no_reconnect;
+    auto_connect_t auto_connect;
     bool log;
+    bool log_append;
     bool log_strip;
     bool local_echo;
-    enum timestamp_t timestamp;
-    const char *log_filename;
-    const char *map;
-    const char *socket;
+    timestamp_t timestamp;
+    char *log_filename;
+    char *log_directory;
+    char *socket;
     int color;
-    bool hex_mode;
+    input_mode_t input_mode;
+    output_mode_t output_mode;
+    char prefix_code;
+    char prefix_key;
+    bool prefix_enabled;
+    bool mute;
+    bool rs485;
+    uint32_t rs485_config_flags;
+    int32_t rs485_delay_rts_before_send;
+    int32_t rs485_delay_rts_after_send;
+    alert_t alert;
+    bool complete_profiles;
+    char *script;
+    char *script_filename;
+    script_run_t script_run;
+    int timestamp_timeout;
+    char *exclude_devices;
+    char *exclude_drivers;
+    char *exclude_tids;
+    int hex_n_value;
+    bool vt100;
+    char *exec;
+    bool map_i_nl_cr;
+    bool map_i_cr_nl;
+    bool map_ign_cr;
+    bool map_i_ff_escc;
+    bool map_i_nl_crnl;
+    bool map_i_cr_crnl;
+    bool map_o_cr_nl;
+    bool map_o_nl_crnl;
+    bool map_o_del_bs;
+    bool map_o_ltu;
+    bool map_o_nulbrk;
+    bool map_i_msb2lsb;
+    bool map_o_ign_cr;
 };
 
 extern struct option_t option;
@@ -65,3 +113,23 @@ extern struct option_t option;
 void options_print();
 void options_parse(int argc, char *argv[]);
 void options_parse_final(int argc, char *argv[]);
+
+int option_string_to_integer(const char *string, int *value, const char *desc, int min, int max);
+
+void option_parse_flow(const char *arg, flow_t *flow);
+void option_parse_parity(const char *arg, parity_t *parity);
+
+void option_parse_output_mode(const char *arg, output_mode_t *mode);
+void option_parse_input_mode(const char *arg, input_mode_t *mode);
+
+void option_parse_line_pulse_duration(const char *arg);
+void option_parse_script_run(const char *arg, script_run_t *script_run);
+void option_parse_alert(const char *arg, alert_t *alert);
+
+void option_parse_auto_connect(const char *arg, auto_connect_t *auto_connect);
+const char *option_auto_connect_state_to_string(auto_connect_t strategy);
+
+void option_parse_timestamp(const char *arg, timestamp_t *timestamp);
+const char* option_timestamp_format_to_string(timestamp_t timestamp);
+
+void option_parse_mappings(const char *map);

src/print.c

@@ -1,5 +1,5 @@
 /*
- * tio - a simple serial terminal I/O tool
+ * tio - a serial device I/O tool
  *
  * Copyright (c) 2014-2022  Martin Lund
  *
@@ -19,9 +19,6 @@
  * 02110-1301, USA.
  */
 
-#include <stdio.h>
-#include <stdbool.h>
-#include "options.h"
 #include "print.h"
 
 bool print_tainted = false;
@@ -29,19 +26,87 @@ char ansi_format[30];
 
 void print_hex(char c)
 {
-  printf("%02x ", (unsigned char) c);
-
-  fflush(stdout);
+    print_tainted = true;
+    printf("%02x ", (unsigned char) c);
 }
 
 void print_normal(char c)
 {
-  putchar(c);
-  fflush(stdout);
+    print_tainted = true;
+    putchar(c);
 }
 
 void print_init_ansi_formatting()
 {
-  // Set bold text with user defined ANSI color
-  sprintf(ansi_format, "\e[1;38;5;%dm", option.color);
+    if (option.color == 256)
+    {
+        // Set bold text with no color changes
+        sprintf(ansi_format, "\e[1m");
+    }
+    else
+    {
+        // Set bold text with user defined ANSI color
+        sprintf(ansi_format, "\e[1;38;5;%dm", option.color);
+    }
+}
+
+void tio_printf_array(const char *array)
+{
+    int i = 0, j = 0;
+
+    tio_printf("");
+
+    while (array[i])
+    {
+        if (array[i] == '\n')
+        {
+            const char *line = &array[j];
+            char *line_copy = strndup(line, i-j);
+            tio_printf_raw("%s\r", line_copy);
+            free(line_copy);
+            j = i;
+        }
+        i++;
+    }
+    tio_printf("");
+}
+
+void print_tainted_set()
+{
+    print_tainted = true;
+}
+
+void print(const char *format, ...)
+{
+    va_list args;
+
+    va_start(args, format);
+    vprintf(format, args);
+    fflush(stdout);
+    va_end(args);
+
+    print_tainted = true;
+}
+
+void print_padded(char *string, size_t length, char pad_char)
+{
+    size_t padding = 0;
+    size_t string_length = 0;
+    size_t i;
+
+    string_length = strlen(string);
+
+    if (string_length < length)
+    {
+        padding += length - string_length;
+        printf("%s", string);
+        for (i=0; i<padding; i++)
+        {
+            putchar(pad_char);
+        }
+    }
+    else
+    {
+        printf("%s", string);
+    }
 }

src/print.h

@@ -1,5 +1,5 @@
 /*
- * tio - a simple serial terminal I/O tool
+ * tio - a serial device I/O tool
  *
  * Copyright (c) 2014-2022  Martin Lund
  *
@@ -21,10 +21,11 @@
 
 #pragma once
 
+#include <stdio.h>
 #include <stdbool.h>
-#include "misc.h"
 #include "error.h"
 #include "options.h"
+#include "timestamp.h"
 
 extern bool print_tainted;
 extern char ansi_format[];
@@ -33,74 +34,110 @@ extern char ansi_format[];
 
 #define ansi_printf(format, args...) \
 { \
-  if (option.color < 0) \
-    fprintf (stdout, "\r" format "\r\n", ## args); \
-  else \
-    fprintf (stdout, "\r%s" format ANSI_RESET "\r\n", ansi_format, ## args); \
-  fflush(stdout); \
+    if (!option.mute) \
+    { \
+        if (option.color < 0) \
+        fprintf (stdout, "\r" format "\r\n", ## args); \
+        else \
+        fprintf (stdout, "\r%s" format ANSI_RESET "\r\n", ansi_format, ## args); \
+    } \
 }
 
 #define ansi_error_printf(format, args...) \
 { \
-  if (option.color < 0) \
-    fprintf (stdout, "\r" format "\r\n", ## args); \
-  else \
-    fprintf (stderr, "\r%s" format ANSI_RESET "\r\n", ansi_format, ## args); \
-  fflush(stderr); \
+    if (!option.mute) \
+    { \
+        if (option.color < 0) \
+        fprintf (stderr, "\r" format "\r\n", ## args); \
+        else \
+        fprintf (stderr, "\r%s" format ANSI_RESET "\r\n", ansi_format, ## args); \
+        fflush(stderr); \
+    } \
 }
 
 #define ansi_printf_raw(format, args...) \
 { \
-  if (option.color < 0) \
-    fprintf (stdout, format, ## args); \
-  else \
-    fprintf (stdout, "%s" format ANSI_RESET, ansi_format, ## args); \
-  fflush(stdout); \
+    if (!option.mute) \
+    { \
+        if (option.color < 0) \
+        fprintf (stdout, format, ## args); \
+        else \
+        fprintf (stdout, "%s" format ANSI_RESET, ansi_format, ## args); \
+    } \
 }
 
-#define warning_printf(format, args...) \
+#define tio_warning_printf(format, args...) \
 { \
-  if (print_tainted) \
-    putchar('\n'); \
-  if (option.color < 0) \
-    fprintf (stdout, "\r[%s] Warning: " format "\r\n", current_time(), ## args); \
-  else \
-    ansi_printf("[%s] Warning: " format, current_time(), ## args); \
-  fflush(stdout); \
+    if (!option.mute) \
+    { \
+        if (print_tainted) \
+        putchar('\n'); \
+        if (option.color < 0) \
+        fprintf (stdout, "\r[%s] Warning: " format "\r\n", timestamp_current_time(), ## args); \
+        else \
+        ansi_printf("[%s] Warning: " format, timestamp_current_time(), ## args); \
+        print_tainted = false; \
+    } \
+}
+
+#define tio_error_print(format, args...) \
+{ \
+    if (!option.mute) \
+    { \
+        if (print_tainted) \
+        putchar('\n'); \
+        if (option.color < 0) { \
+            if (error_normal) \
+                fprintf (stderr, "Error: " format "\n", ## args); \
+            else \
+                fprintf (stderr, "\r[%s] Error: " format "\r\n", timestamp_current_time(), ## args); \
+        } \
+        else { \
+            if (error_normal) \
+            { ansi_error_printf("Error: " format, ## args); }\
+            else \
+            { ansi_error_printf("[%s] Error: " format, timestamp_current_time(), ## args); }\
+        } \
+        print_tainted = false; \
+    } \
 }
 
 #define tio_printf(format, args...) \
 { \
-  if (print_tainted) \
-    putchar('\n'); \
-  ansi_printf("[%s] " format, current_time(), ## args); \
-  print_tainted = false; \
+    if (!option.mute) \
+    { \
+        if (print_tainted) \
+        putchar('\n'); \
+        ansi_printf("[%s] " format, timestamp_current_time(), ## args); \
+        print_tainted = false; \
+    } \
 }
 
-#define tio_error_printf(format, args...) \
+#define tio_printf_raw(format, args...) \
 { \
-  if (print_tainted) \
-    putchar('\n'); \
-  ansi_error_printf("[%s] " format, current_time(), ## args); \
-  print_tainted = false; \
+    if (!option.mute) \
+    { \
+        if (print_tainted) \
+        putchar('\n'); \
+        ansi_printf_raw("[%s] " format, timestamp_current_time(), ## args); \
+        print_tainted = false; \
+    } \
 }
 
-#define error_printf(format, args...) \
-  snprintf(error[0], 1000, format, ## args);
-
-#define error_printf_silent(format, args...) \
-  snprintf(error[1], 1000, format, ## args);
-
 #ifdef DEBUG
-#define debug_printf(format, args...) \
-  fprintf (stdout, "[debug] " format, ## args)
-#define debug_printf_raw(format, args...) \
-  fprintf (stdout, "" format, ## args)
+#define tio_debug_printf(format, args...) \
+    fprintf(stdout, "[debug] " format, ## args)
+#define tio_debug_printf_raw(format, args...) \
+    fprintf(stdout, "" format, ## args)
 #else
-#define debug_printf(format, args...)
-#define debug_printf_raw(format, args...)
+#define tio_debug_printf(format, args...)
+#define tio_debug_printf_raw(format, args...)
 #endif
 
+void print(const char *format, ...);
 void print_hex(char c);
 void print_normal(char c);
 void print_init_ansi_formatting(void);
+void tio_printf_array(const char *array);
+void print_tainted_set(void);
+void print_padded(char *string, size_t length, char pad_char);

src/readline.c

@@ -0,0 +1,276 @@
+/*
+ * tio - a serial device I/O tool
+ *
+ * Copyright (c) 2014-2024  Martin Lund
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA.
+ */
+
+#include "print.h"
+#include "misc.h"
+
+#define RL_LINE_LENGTH_MAX PATH_MAX
+#define RL_HISTORY_MAX 1000
+
+static char rl_line[RL_LINE_LENGTH_MAX] = {};
+static char *rl_history[RL_HISTORY_MAX];
+static int rl_history_count = 0;
+static int rl_history_index = 0;
+static int rl_line_length = 0;
+static int rl_cursor_pos = 0;
+static int rl_escape = 0;
+
+static void print_line(const char *string, int cursor_pos)
+{
+    clear_line();
+    print("%s", string);
+    print("\r"); // Move the cursor back to the beginning
+    for (int i = 0; i < cursor_pos; ++i)
+    {
+        print("\x1b[C"); // Move the cursor right
+    }
+}
+
+void readline_init(void)
+{
+    rl_history_count = 0;
+    rl_history_index = 0;
+
+    for (int i = 0; i < RL_HISTORY_MAX; ++i)
+    {
+        rl_history[i] = NULL;
+    }
+
+    rl_line[0] = 0;
+    rl_line_length = 0;
+    rl_cursor_pos = 0;
+    rl_escape = 0;
+}
+
+char * readline_get(void)
+{
+    return rl_line;
+}
+
+static void readline_input_char(char input_char)
+{
+    if (rl_line_length < RL_LINE_LENGTH_MAX - 1)
+    {
+        memmove(&rl_line[rl_cursor_pos + 1], &rl_line[rl_cursor_pos], rl_line_length - rl_cursor_pos);
+        rl_line[rl_cursor_pos] = input_char;
+        rl_line_length++;
+        rl_cursor_pos++;
+        rl_line[rl_line_length] = '\0';
+        print_line(rl_line, rl_cursor_pos);
+    }
+    rl_escape = 0;
+}
+
+static void readline_input_cr(void)
+{
+    if (rl_line_length > 0)
+    {
+        // Save to history
+        if (rl_history_count < RL_HISTORY_MAX)
+        {
+            rl_history[rl_history_count] = strndup(rl_line, rl_line_length);
+            rl_history_count++;
+        }
+        else
+    {
+            free(rl_history[0]);
+            memmove(&rl_history[0], &rl_history[1], (RL_HISTORY_MAX - 1) * sizeof(char*));
+            rl_history[RL_HISTORY_MAX - 1] = strndup(rl_line, rl_line_length);
+        }
+    }
+
+    rl_line[rl_line_length] = '\0';
+    if (option.local_echo == false)
+    {
+        clear_line();
+    }
+    else
+    {
+        print("\r\n");
+    }
+
+    rl_line_length = 0;
+    rl_cursor_pos = 0;
+    rl_history_index = rl_history_count;
+    rl_escape = 0;
+}
+
+static void readline_input_bs(void)
+{
+    if (rl_cursor_pos > 0)
+    {
+        memmove(&rl_line[rl_cursor_pos - 1], &rl_line[rl_cursor_pos], rl_line_length - rl_cursor_pos);
+        rl_line_length--;
+        rl_cursor_pos--;
+        rl_line[rl_line_length] = '\0';
+        print_line(rl_line, rl_cursor_pos);
+    }
+    rl_escape = 0;
+}
+
+static void readline_input_escape(void)
+{
+    rl_escape = 1;
+}
+
+static void readline_input_left_bracket(void)
+{
+    if (rl_escape == 1)
+    {
+        rl_escape = 2;
+    }
+    else
+    {
+        rl_escape = 0;
+    }
+}
+
+static void readline_input_A(void)
+{
+    if (rl_escape == 2)
+    {
+        // Up arrow
+        if (rl_history_index > 0)
+        {
+            rl_history_index--;
+            strncpy(rl_line, rl_history[rl_history_index], RL_LINE_LENGTH_MAX-1);
+            rl_line_length = strlen(rl_line);
+            rl_cursor_pos = rl_line_length;
+            print_line(rl_line, rl_cursor_pos);
+        }
+    }
+    else
+    {
+        readline_input_char('A');
+    }
+
+    rl_escape = 0;
+}
+
+static void readline_input_B(void)
+{
+    if (rl_escape == 2)
+    {
+        // Down arrow
+        if (rl_history_index < rl_history_count - 1)
+        {
+            rl_history_index++;
+            strncpy(rl_line, rl_history[rl_history_index], RL_LINE_LENGTH_MAX-1);
+            rl_line_length = strlen(rl_line);
+            rl_cursor_pos = rl_line_length;
+            print_line(rl_line, rl_cursor_pos);
+        }
+        else if (rl_history_index == rl_history_count - 1)
+        {
+            rl_history_index++;
+            rl_line_length = 0;
+            rl_cursor_pos = 0;
+            rl_line[rl_line_length] = '\0';
+            print_line(rl_line, rl_cursor_pos);
+        }
+    }
+    else
+    {
+        readline_input_char('B');
+    }
+
+    rl_escape = 0;
+}
+
+static void readline_input_C(void)
+{
+    if (rl_escape == 2)
+    {
+        // Right arrow
+        if (rl_cursor_pos < rl_line_length)
+        {
+            rl_cursor_pos++;
+            print("\x1b[C");
+        }
+    }
+    else
+    {
+        readline_input_char('C');
+    }
+
+    rl_escape = 0;
+}
+
+static void readline_input_D(void)
+{
+    if (rl_escape == 2)
+    {
+        // Left arrow
+        if (rl_cursor_pos > 0)
+        {
+            rl_cursor_pos--;
+            print("\b");
+        }
+    }
+    else
+    {
+        readline_input_char('D');
+    }
+
+    rl_escape = 0;
+}
+
+void readline_input(char input_char)
+{
+    switch (input_char)
+    {
+        case '\r': // Carriage return
+            readline_input_cr();
+            break;
+
+        case 127: // Backspace
+            readline_input_bs();
+            break;
+
+        case 27: // Escape
+            readline_input_escape();
+            break;
+
+        case '[':
+            readline_input_left_bracket();
+            break;
+
+        case 'A':
+            readline_input_A();
+            break;
+
+        case 'B':
+            readline_input_B();
+            break;
+
+        case 'C':
+            readline_input_C();
+            break;
+
+        case 'D':
+            readline_input_D();
+            break;
+
+        default:
+            readline_input_char(input_char);
+            break;
+    }
+}

src/readline.h

@@ -1,7 +1,7 @@
 /*
- * tio - a simple serial terminal I/O tool
+ * tio - a serial device I/O tool
  *
- * Copyright (c) 2017  Martin Lund
+ * Copyright (c) 2014-2024  Martin Lund
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License
@@ -19,10 +19,8 @@
  * 02110-1301, USA.
  */
 
-#include <sys/ioctl.h>
-#include <IOKit/serial/ioss.h>
+#pragma once
 
-int iossiospeed(int fd, int baudrate)
-{
-  return ioctl(fd, IOSSIOSPEED, (char *)&baudrate);
-}
+void readline_init(void);
+void readline_input(char input_char);
+char * readline_get(void);

src/rs485.c

@@ -0,0 +1,210 @@
+/*
+ * tio - a serial device I/O tool
+ *
+ * Copyright (c) 2022  Martin Lund
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA.
+ */
+
+#include <stdio.h>
+#include <errno.h>
+#include <string.h>
+#include <sys/ioctl.h>
+#include "options.h"
+#include "print.h"
+#include "misc.h"
+
+#ifdef HAVE_RS485
+
+#include <linux/serial.h>
+
+static struct serial_rs485 rs485_config_saved;
+static struct serial_rs485 rs485_config;
+static bool rs485_config_written = false;
+
+void rs485_parse_config(const char *arg)
+{
+    bool token_found = true;
+    char *token = NULL;
+    char *buffer = strdup(arg);
+
+    while (token_found == true)
+    {
+        if (token == NULL)
+        {
+            token = strtok(buffer,",");
+        }
+        else
+        {
+            token = strtok(NULL, ",");
+        }
+
+        if (token != NULL)
+        {
+            char keyname[31];
+            unsigned int value;
+            int match_count;
+
+            match_count = sscanf(token, "%30[^=]=%d", keyname, &value);
+
+            if (match_count == 2)
+            {
+                if (!strcmp(keyname, "RTS_ON_SEND"))
+                {
+                    if (value)
+                    {
+                        /* Set logical level for RTS pin equal to 1 when sending */
+                        option.rs485_config_flags |= SER_RS485_RTS_ON_SEND;
+                    }
+                    else
+                    {
+                        /* Set logical level for RTS pin equal to 0 when sending */
+                        option.rs485_config_flags &= ~(SER_RS485_RTS_ON_SEND);
+                    }
+                }
+                else if (!strcmp(keyname, "RTS_AFTER_SEND"))
+                {
+                    if (value)
+                    {
+                        /* Set logical level for RTS pin equal to 1 after sending */
+                        option.rs485_config_flags |= SER_RS485_RTS_AFTER_SEND;
+                    }
+                    else
+                    {
+                        /* Set logical level for RTS pin equal to 0 after sending */
+                        option.rs485_config_flags &= ~(SER_RS485_RTS_AFTER_SEND);
+                    }
+                }
+                else if (!strcmp(keyname, "RTS_DELAY_BEFORE_SEND"))
+                {
+                    /* Set RTS delay before send */
+                    option.rs485_delay_rts_before_send = value;
+                }
+                else if (!strcmp(keyname, "RTS_DELAY_AFTER_SEND"))
+                {
+                    /* Set RTS delay after send */
+                    option.rs485_delay_rts_after_send = value;
+                }
+            }
+            else if (match_count == 1)
+            {
+                if (!strcmp(keyname, "RX_DURING_TX"))
+                {
+                    /* Receive data even while sending data */
+                    option.rs485_config_flags |= SER_RS485_RX_DURING_TX;
+                }
+            }
+            else
+            {
+                token_found = false;
+            }
+        }
+        else
+        {
+            token_found = false;
+        }
+    }
+    free(buffer);
+}
+
+void rs485_print_config(void)
+{
+    tio_printf(" RS-485 Configuration:");
+    tio_printf("  RTS_ON_SEND: %s", (rs485_config.flags & SER_RS485_RTS_ON_SEND) ? "high" : "low");
+    tio_printf("  RTS_AFTER_SEND: %s", (rs485_config.flags & SER_RS485_RTS_AFTER_SEND) ? "high" : "low");
+    tio_printf("  RTS_DELAY_BEFORE_SEND = %d", rs485_config.delay_rts_before_send);
+    tio_printf("  RTS_DELAY_AFTER_SEND = %d", rs485_config.delay_rts_after_send);
+    tio_printf("  RX_DURING_TX: %s", (rs485_config.flags & SER_RS485_RX_DURING_TX) ? "true" : "false");
+}
+
+int rs485_mode_enable(int fd)
+{
+    /* Save existing RS-485 configuration */
+    ioctl (fd, TIOCGRS485, &rs485_config_saved);
+
+    /* Prepare new RS-485 configuration */
+    rs485_config.flags = SER_RS485_ENABLED;
+    rs485_config.flags |= option.rs485_config_flags;
+
+    if (option.rs485_delay_rts_before_send > 0)
+    {
+        rs485_config.delay_rts_before_send = option.rs485_delay_rts_before_send;
+    }
+    else
+    {
+        rs485_config.delay_rts_before_send = rs485_config_saved.delay_rts_before_send;
+    }
+
+    if (option.rs485_delay_rts_after_send > 0)
+    {
+        rs485_config.delay_rts_after_send = option.rs485_delay_rts_after_send;
+    }
+    else
+    {
+        rs485_config.delay_rts_after_send = rs485_config_saved.delay_rts_after_send;
+    }
+
+    /* Write new RS-485 configuration */
+    if (ioctl(fd, TIOCSRS485, &rs485_config) < 0)
+    {
+        tio_warning_printf("RS-485 mode is not supported by your device (%s)", strerror(errno));
+        return -1;
+    }
+
+    rs485_config_written = true;
+
+    return 0;
+}
+
+void rs485_mode_restore(int fd)
+{
+    if (rs485_config_written)
+    {
+        /* Write saved RS-485 configuration */
+        if (ioctl(fd, TIOCSRS485, &rs485_config_saved) < 0)
+        {
+            tio_warning_printf("TIOCGRS485 ioctl failed (%s)", strerror(errno));
+        }
+    }
+}
+
+#else
+
+void rs485_parse_config(const char *arg)
+{
+    UNUSED(arg);
+    return;
+}
+
+void rs485_print_config(void)
+{
+    return;
+}
+
+int rs485_mode_enable(int fd)
+{
+    UNUSED(fd);
+    tio_error_printf("RS485 mode is not supported on your system");
+    exit(EXIT_FAILURE);
+}
+
+void rs485_mode_restore(int fd)
+{
+    UNUSED(fd);
+    return;
+}
+
+#endif

src/rs485.h

@@ -0,0 +1,27 @@
+/*
+ * tio - a serial device I/O tool
+ *
+ * Copyright (c) 2022  Martin Lund
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA.
+ */
+
+#pragma once
+
+void rs485_parse_config(const char *arg);
+int rs485_mode_enable(int fd);
+void rs485_mode_restore(int fd);
+void rs485_print_config(void);

src/script.c

@@ -0,0 +1,547 @@
+/*
+ * tio - a serial device I/O tool
+ *
+ * Copyright (c) 2014-2024  Martin Lund
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA.
+ */
+
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+#include <time.h>
+#include <lauxlib.h>
+#include <lualib.h>
+#include <sys/ioctl.h>
+#include <ctype.h>
+#include "misc.h"
+#include "print.h"
+#include "options.h"
+#include "tty.h"
+#include "xymodem.h"
+#include "log.h"
+#include "script.h"
+#include "fs.h"
+#include "timestamp.h"
+#include "termios.h"
+
+#define MAX_BUFFER_SIZE 2000 // Maximum size of circular buffer
+#define READ_LINE_SIZE 4096 // read_line buffer length
+
+static int device_fd;
+
+static char script_init[] =
+"tio.set = function(arg)\n"
+"    local dtr = arg.DTR or -1\n"
+"    local rts = arg.RTS or -1\n"
+"    local cts = arg.CTS or -1\n"
+"    local dsr = arg.DSR or -1\n"
+"    local cd = arg.CD or -1\n"
+"    local ri = arg.RI or -1\n"
+"    tio.line_set(dtr, rts, cts, dsr, cd, ri)\n"
+"end\n"
+"tio.expect = function(pattern, timeout)\n"
+"    local str = ''\n"
+"    while true do\n"
+"        local c = tio.read(1, timeout)\n"
+"        if c then\n"
+"            str = str .. c\n"
+"            if string.match(str, pattern) then\n"
+"                return string.match(str, pattern)\n"
+"            end\n"
+"        else\n"
+"            return nil, str\n"
+"        end\n"
+"    end\n"
+"end\n"
+"tio.alwaysecho = true\n"
+"setmetatable(tio, tio)\n";
+
+static bool alwaysecho(lua_State *L)
+{
+    bool b;
+
+    lua_getglobal(L, "tio");
+    lua_getfield(L, -1, "alwaysecho");
+    b = lua_toboolean(L, -1);
+    lua_pop(L, 2);
+
+    return b;
+}
+
+static int api_echo(lua_State *L)
+{
+    size_t len = 0;
+    const char *str = luaL_checklstring(L, 1, &len);
+
+    if (option.timestamp)
+    {
+        char *pTimeStampNow = timestamp_current_time();
+        if (pTimeStampNow)
+        {
+            tio_printf("%s", str);
+            if (option.log)
+            {
+                log_printf("\n[%s] %s", pTimeStampNow, str);
+            }
+        }
+    } else {
+        for (size_t i=0; i<len; i++)
+        {
+            putchar(str[i]);
+
+            if (option.log)
+                log_putc(str[i]);
+        }
+    }
+
+    return 0;
+}
+
+static void maybe_echo(lua_State *L)
+{
+    if (alwaysecho(L))
+    {
+        lua_pushcfunction(L, api_echo);
+        lua_pushvalue(L, -2);
+        lua_call(L, 1, 0);
+    }
+}
+
+// lua: tio.sleep(seconds)
+static int api_sleep(lua_State *L)
+{
+    long seconds = lua_tointeger(L, 1);
+
+    if (seconds < 0)
+    {
+        return 0;
+    }
+
+    tio_printf("Sleeping %ld seconds", seconds);
+
+    sleep(seconds);
+
+    return 0;
+}
+
+// lua: tio.msleep(miliseconds)
+static int api_msleep(lua_State *L)
+{
+    long mseconds = lua_tointeger(L, 1);
+    long useconds = mseconds * 1000;
+
+    if (useconds < 0)
+    {
+        return 0;
+    }
+
+    tio_printf("Sleeping %ld ms", mseconds);
+    usleep(useconds);
+
+    return 0;
+}
+
+// lua: tio.line_set(dtr,rts,cts,dsr,cd,ri)
+static int line_set(lua_State *L)
+{
+    tty_line_config_t line_config[6] = { };
+
+    int dtr = lua_tointeger(L, 1);
+    int rts = lua_tointeger(L, 2);
+    int cts = lua_tointeger(L, 3);
+    int dsr = lua_tointeger(L, 4);
+    int cd = lua_tointeger(L, 5);
+    int ri = lua_tointeger(L, 6);
+
+    if (dtr != -1)
+    {
+        line_config[0].mask = TIOCM_DTR;
+        line_config[0].value = dtr;
+        line_config[0].reserved = true;
+    }
+    if (rts != -1)
+    {
+        line_config[1].mask = TIOCM_RTS;
+        line_config[1].value = rts;
+        line_config[1].reserved = true;
+    }
+    if (cts != -1)
+    {
+        line_config[2].mask = TIOCM_CTS;
+        line_config[2].value = cts;
+        line_config[2].reserved = true;
+    }
+    if (dsr != -1)
+    {
+        line_config[3].mask = TIOCM_DSR;
+        line_config[3].value = dsr;
+        line_config[3].reserved = true;
+    }
+    if (cd != -1)
+    {
+        line_config[4].mask = TIOCM_CD;
+        line_config[4].value = cd;
+        line_config[4].reserved = true;
+    }
+    if (ri != -1)
+    {
+        line_config[5].mask = TIOCM_RI;
+        line_config[5].value = ri;
+        line_config[5].reserved = true;
+    }
+
+    tty_line_set(device_fd, line_config);
+
+    return 0;
+}
+
+// lua: tio.send(file, protocol)
+static int api_send(lua_State *L)
+{
+    const char *file = luaL_checkstring(L, 1);
+    int protocol = luaL_checkinteger(L, 2);
+    int ret;
+
+    if (file == NULL)
+    {
+        return 0;
+    }
+
+    switch (protocol)
+    {
+        case XMODEM_1K:
+            tio_printf("Sending file '%s' using XMODEM-1K", file);
+            ret = xymodem_send(device_fd, file, XMODEM_1K);
+            tio_printf("%s", ret < 0 ? "Aborted" : "Done");
+            break;
+
+        case XMODEM_CRC:
+            tio_printf("Sending file '%s' using XMODEM-CRC", file);
+            ret = xymodem_send(device_fd, file, XMODEM_CRC);
+            tio_printf("%s", ret < 0 ? "Aborted" : "Done");
+            break;
+
+        case YMODEM:
+            tio_printf("Sending file '%s' using YMODEM", file);
+            ret = xymodem_send(device_fd, file, YMODEM);
+            tio_printf("%s", ret < 0 ? "Aborted" : "Done");
+            break;
+    }
+
+    return 0;
+}
+
+// lua: tio.write(string)
+static int api_write(lua_State *L)
+{
+    size_t len = 0;
+    const char *string = luaL_checklstring(L, 1, &len);
+    ssize_t ret;
+    int attempts = 100;
+
+    do {
+        ret = write(device_fd, string, len);
+        if (ret < 0)
+            return luaL_error(L, "%s", strerror(errno));
+
+        len -= ret;
+        string += ret;
+    } while (len > 0 && --attempts);
+
+    if (len > 0)
+        return luaL_error(L, "partial write");
+
+    fsync(device_fd);  // flush these characters now
+    tcdrain(device_fd); //ensure we flushed characters to our device
+
+    lua_getglobal(L, "tio");
+
+    return 1;
+}
+
+// lua: tio.read(size, timeout)
+static int api_read(lua_State *L)
+{
+    int size = luaL_checkinteger(L, 1);
+    int timeout = lua_tointeger(L, 2);
+
+    if (timeout == 0)
+    {
+        timeout = -1; // Wait forever
+    }
+
+    luaL_Buffer buffer;
+    luaL_buffinit(L, &buffer);
+
+#if LUA_VERSION_NUM >= 502
+    char *p = luaL_prepbuffsize(&buffer, size);
+#else
+    if (size > LUAL_BUFFERSIZE)
+        return luaL_error(L, "buffer overflow, max size is: %d", LUAL_BUFFERSIZE);
+    char *p = luaL_prepbuffer(&buffer);
+#endif
+
+    ssize_t ret = read_poll(device_fd, p, size, timeout);
+    if (ret < 0)
+        return luaL_error(L, "%s", strerror(errno));
+
+    luaL_addsize(&buffer, ret);
+    luaL_pushresult(&buffer);
+
+    if (ret == 0)
+    {
+        // On timeout return nil instead of an empty string
+        lua_pop(L, 1);
+        lua_pushnil(L);
+    }
+    else
+    {
+        maybe_echo(L);
+    }
+
+    return 1;
+}
+
+// lua: string = tio.readline(timeout)
+static int api_readline(lua_State *L) {
+    int timeout = lua_tointeger(L, 1); //ms
+    luaL_Buffer b;
+    char ch;
+
+    if (timeout == 0)
+    {
+        timeout = -1; // Wait forever
+    }
+
+    luaL_buffinit(L, &b);
+    luaL_prepbuffer(&b);
+    while (true) {
+        int ret = read_poll(device_fd, &ch, 1, timeout);
+
+        if (ret < 0)
+            return luaL_error(L, "%s", strerror(errno));
+
+        if (ret == 0)
+        {
+            luaL_pushresult(&b);
+            maybe_echo(L);
+            lua_pushnil(L);
+            lua_insert(L, -2);
+            return 2;
+        }
+
+        if (ch == '\n')
+        {
+            luaL_pushresult(&b);
+            maybe_echo(L);
+            return 1;
+        }
+
+        luaL_addchar(&b, ch);
+    }
+}
+
+// lua: table = tio.ttysearch()
+static int api_ttysearch(lua_State *L)
+{
+    UNUSED(L);
+    GList *iter;
+    int i = 1;
+
+    GList *device_list = tty_search_for_serial_devices();
+
+    if (device_list == NULL)
+    {
+        return 0;
+    }
+
+    // Create a new table
+    lua_newtable(L);
+
+    // Iterate through found devices
+    for (iter = device_list; iter != NULL; iter = g_list_next(iter))
+    {
+        device_t *device = (device_t *) iter->data;
+
+        // Create a new sub-table for each serial device
+        lua_newtable(L);
+
+        // Add elements to the table
+        lua_pushstring(L, "path");
+        lua_pushstring(L, device->path);
+        lua_settable(L, -3);
+
+        lua_pushstring(L, "tid");
+        lua_pushstring(L, device->tid);
+        lua_settable(L, -3);
+
+        lua_pushstring(L, "uptime");
+        lua_pushnumber(L, device->uptime);
+        lua_settable(L, -3);
+
+        lua_pushstring(L, "driver");
+        lua_pushstring(L, device->driver);
+        lua_settable(L, -3);
+
+        lua_pushstring(L, "description");
+        lua_pushstring(L, device->description);
+        lua_settable(L, -3);
+
+        // Set the sub-table as a row in the main table
+        lua_rawseti(L, -2, i++);
+    }
+
+    // Return table
+    return 1;
+}
+
+static void script_buffer_run(lua_State *L, const char *script_buffer)
+{
+    int error;
+
+    error = luaL_loadbuffer(L, script_buffer, strlen(script_buffer), "tio") ||
+        lua_pcall(L, 0, 0, 0);
+    if (error)
+    {
+        tio_warning_printf("lua: %s\n", lua_tostring(L, -1));
+        lua_pop(L, 1);  /* Pop error message from the stack */
+    }
+}
+
+static void script_file_run(lua_State *L, const char *filename)
+{
+    if (strlen(filename) == 0)
+    {
+        tio_warning_printf("Missing script filename\n");
+        return;
+    }
+
+    if (luaL_dofile(L, filename))
+    {
+        tio_warning_printf("lua: %s", lua_tostring(L, -1));
+        lua_pop(L, 1);  /* pop error message from the stack */
+        return;
+    }
+}
+
+static const struct luaL_Reg tio_lib[] =
+{
+    { "echo", api_echo},
+    { "sleep", api_sleep},
+    { "msleep", api_msleep},
+    { "line_set", line_set},
+    { "send", api_send},
+    { "write", api_write},
+    { "read", api_read},
+    { "readline", api_readline},
+    { "ttysearch", api_ttysearch},
+    {NULL, NULL}
+};
+
+static void script_load(lua_State *L)
+{
+    int error;
+
+    error = luaL_loadbuffer(L, script_init, strlen(script_init), "tio") || lua_pcall(L, 0, 0, 0);
+    if (error)
+    {
+        tio_error_print("%s\n", lua_tostring(L, -1));
+        lua_pop(L, 1); // Pop error message from the stack
+    }
+}
+
+static void script_set_global(lua_State *L, const char *name, long value)
+{
+    lua_pushnumber(L, value);
+    lua_setglobal(L, name);
+}
+
+static void script_set_globals(lua_State *L)
+{
+    script_set_global(L, "toggle", 2);
+    script_set_global(L, "high", 1);
+    script_set_global(L, "low", 0);
+    script_set_global(L, "XMODEM_CRC", XMODEM_CRC);
+    script_set_global(L, "XMODEM_1K", XMODEM_1K);
+    script_set_global(L, "YMODEM", YMODEM);
+}
+
+#if LUA_VERSION_NUM >= 502
+static int luaopen_tio(lua_State *L)
+{
+    luaL_newlib(L, tio_lib);
+    return 1;
+}
+#endif
+
+void script_run(int fd, const char *script_filename)
+{
+    lua_State *L;
+
+    device_fd = fd;
+
+    L = luaL_newstate();
+    luaL_openlibs(L);
+
+#if LUA_VERSION_NUM >= 502
+    luaL_requiref(L, "tio", luaopen_tio, 1);
+#else
+    luaL_register(L, "tio", tio_lib);
+#endif
+    lua_pop(L, 1);
+
+    // Load lua init script
+    script_load(L);
+
+    // Initialize globals
+    script_set_globals(L);
+
+    if (script_filename != NULL)
+    {
+        tio_printf("Running script %s", script_filename);
+        script_file_run(L, script_filename);
+    }
+    else if (option.script_filename != NULL)
+    {
+        tio_printf("Running script %s", option.script_filename);
+        script_file_run(L, option.script_filename);
+    }
+    else if (option.script != NULL)
+    {
+        tio_printf("Running script");
+        script_buffer_run(L, option.script);
+    }
+
+    lua_close(L);
+}
+
+const char *script_run_state_to_string(script_run_t state)
+{
+    switch (state)
+    {
+        case SCRIPT_RUN_ONCE:
+            return "once";
+        case SCRIPT_RUN_ALWAYS:
+            return "always";
+        case SCRIPT_RUN_NEVER:
+            return "never";
+        default:
+            return "Unknown";
+    }
+}

src/script.h

@@ -0,0 +1,33 @@
+/*
+ * tio - a serial device I/O tool
+ *
+ * Copyright (c) 2014-2024  Martin Lund
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA.
+ */
+
+#pragma once
+
+typedef enum
+{
+    SCRIPT_RUN_ONCE,
+    SCRIPT_RUN_ALWAYS,
+    SCRIPT_RUN_NEVER,
+    SCRIPT_RUN_END,
+} script_run_t;
+
+void script_run(int fd, const char *script_filename);
+const char *script_run_state_to_string(script_run_t state);

src/setspeed.c

@@ -1,5 +1,5 @@
 /*
- * tio - a simple serial terminal I/O tool
+ * tio - a serial device I/O tool
  *
  * Copyright (c) 2017-2022  Martin Lund
  *
@@ -19,13 +19,24 @@
  * 02110-1301, USA.
  */
 
+#include <errno.h>
+
+#ifdef HAVE_TERMIOS2
 #define termios asmtermios
 #include <sys/ioctl.h>
 #undef termios
 #include <asm-generic/ioctls.h>
 #include <asm-generic/termbits.h>
 
-int setspeed2(int fd, int baudrate)
+#elif HAVE_IOSSIOSPEED
+#include <sys/ioctl.h>
+#include <IOKit/serial/ioss.h>
+#endif
+
+#include "misc.h"
+
+#ifdef HAVE_TERMIOS2
+int setspeed(int fd, int baudrate)
 {
     struct termios2 tio;
     int status;
@@ -42,3 +53,20 @@ int setspeed2(int fd, int baudrate)
 
     return status;
 }
+
+#elif HAVE_IOSSIOSPEED
+int setspeed(int fd, int baudrate)
+{
+    return ioctl(fd, IOSSIOSPEED, (char *)&baudrate);
+}
+
+#else
+int setspeed(int fd, int baudrate)
+{
+    UNUSED(fd);
+    UNUSED(baudrate);
+
+    errno = EINVAL;
+    return -1;
+}
+#endif

src/setspeed.h

@@ -0,0 +1,24 @@
+/*
+ * tio - a serial device I/O tool
+ *
+ * Copyright (c) 2022  Martin Lund
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA.
+ */
+
+#pragma once
+
+int setspeed(int fd, int baudrate);

src/signals.c

@@ -1,5 +1,5 @@
 /*
- * tio - a simple serial terminal I/O tool
+ * tio - a serial device I/O tool
  *
  * Copyright (c) 2022  Martin Lund
  *
@@ -27,15 +27,25 @@
 #include "error.h"
 #include "print.h"
 #include "misc.h"
+#include "tty.h"
 
 static void signal_handler(int signum)
 {
-    UNUSED(signum);
-    tio_printf("Received hangup signal!");
+    switch (signum)
+    {
+        case SIGHUP:
+            tio_printf("Received SIGHUP signal!");
+            break;
+        case SIGINT:
+            tio_printf("Received SIGINT signal!");
+            break;
+    }
     exit(EXIT_FAILURE);
 }
 
 void signal_handlers_install(void)
 {
     signal(SIGHUP, signal_handler);
+    signal(SIGINT, signal_handler);
+    signal(SIGPIPE, SIG_IGN);
 }

src/signals.h

@@ -1,5 +1,5 @@
 /*
- * tio - a simple serial terminal I/O tool
+ * tio - a serial device I/O tool
  *
  * Copyright (c) 2022  Martin Lund
  *

src/socket.c

@@ -1,5 +1,5 @@
 /*
- * tio - a simple serial terminal I/O tool
+ * tio - a serial device I/O tool
  *
  * Copyright (c) 2014-2022  Martin Lund
  * Copyright (c) 2022  Google LLC
@@ -20,10 +20,6 @@
  * 02110-1301, USA.
  */
 
-#include "socket.h"
-#include "options.h"
-#include "print.h"
-
 #include <errno.h>
 #include <stdio.h>
 #include <stdlib.h>
@@ -32,6 +28,12 @@
 #include <sys/un.h>
 #include <netinet/in.h>
 #include <unistd.h>
+#include <string.h>
+
+#include "socket.h"
+#include "options.h"
+#include "print.h"
+#include "tty.h"
 
 #define MAX_SOCKET_CLIENTS 16
 #define SOCKET_PORT_DEFAULT 3333
@@ -50,23 +52,23 @@ static const char *socket_filename(void)
 static int socket_inet_port(void)
 {
     /* skip 'inet:' */
-    int port_number = atoi(option.socket + 5);
-    if (port_number == 0)
+    int port = atoi(option.socket + 5);
+    if (port == 0)
     {
-        port_number = SOCKET_PORT_DEFAULT;
+        port = SOCKET_PORT_DEFAULT;
     }
-    return port_number;
+    return port;
 }
 
 static int socket_inet6_port(void)
 {
     /* skip 'inet6:' */
-    int port_number = atoi(option.socket + 6);
-    if (port_number == 0)
+    int port = atoi(option.socket + 6);
+    if (port == 0)
     {
-        port_number = SOCKET_PORT_DEFAULT;
+        port = SOCKET_PORT_DEFAULT;
     }
-    return port_number;
+    return port;
 }
 
 static void socket_exit(void)
@@ -77,6 +79,44 @@ static void socket_exit(void)
     }
 }
 
+static bool socket_stale(const char *path)
+{
+    struct sockaddr_un addr;
+    bool stale = false;
+    int sfd;
+
+    /* Test if socket file exists */
+    if (access(path, F_OK) == 0)
+    {
+        /* Create test socket  */
+        sfd = socket(AF_UNIX, SOCK_STREAM, 0);
+        if (sfd < 0)
+        {
+            tio_warning_printf("Failure opening socket (%s)", strerror(errno));
+            return false;
+        }
+
+        /* Prepare address */
+        addr.sun_family = AF_UNIX;
+        strncpy(addr.sun_path, path, sizeof(addr.sun_path) - 1);
+
+        /* Perform connect to test if socket is active */
+        if (connect(sockfd, (struct sockaddr *) &addr, sizeof(struct sockaddr_un)) == -1)
+        {
+            if (errno == ECONNREFUSED)
+            {
+                // No one is listening on socket file
+                stale = true;
+            }
+        }
+
+        /* Cleanup */
+        close(sockfd);
+    }
+
+    return stale;
+}
+
 void socket_configure(void)
 {
     struct sockaddr_un sockaddr_unix = {};
@@ -84,6 +124,7 @@ void socket_configure(void)
     struct sockaddr_in6 sockaddr_inet6 = {};
     struct sockaddr *sockaddr_p;
     socklen_t socklen;
+    int optval;
 
     /* Parse socket string */
 
@@ -93,13 +134,13 @@ void socket_configure(void)
 
         if (strlen(socket_filename()) == 0)
         {
-            error_printf("Missing socket filename");
+            tio_error_printf("Missing socket filename");
             exit(EXIT_FAILURE);
         }
 
         if (strlen(socket_filename()) > sizeof(sockaddr_unix.sun_path) - 1)
         {
-            error_printf("Socket file path %s too long", option.socket);
+            tio_error_printf("Socket file path %s too long", option.socket);
             exit(EXIT_FAILURE);
         }
     }
@@ -112,7 +153,7 @@ void socket_configure(void)
 
         if (port_number < 0)
         {
-            error_printf("Invalid port number: %d", port_number);
+            tio_error_printf("Invalid port number: %d", port_number);
             exit(EXIT_FAILURE);
         }
     }
@@ -125,14 +166,14 @@ void socket_configure(void)
 
         if (port_number < 0)
         {
-            error_printf("Invalid port number: %d", port_number);
+            tio_error_printf("Invalid port number: %d", port_number);
             exit(EXIT_FAILURE);
         }
     }
 
     if (socket_family == AF_UNSPEC)
     {
-        error_printf("%s: Invalid socket scheme, must be prefixed with 'unix:', 'inet:', or 'inet6:'", option.socket);
+        tio_error_printf("%s: Invalid socket scheme, must be prefixed with 'unix:', 'inet:', or 'inet6:'", option.socket);
         exit(EXIT_FAILURE);
     }
 
@@ -145,6 +186,14 @@ void socket_configure(void)
             strncpy(sockaddr_unix.sun_path, socket_filename(), sizeof(sockaddr_unix.sun_path) - 1);
             sockaddr_p = (struct sockaddr *) &sockaddr_unix;
             socklen = sizeof(sockaddr_unix);
+
+            /* Test for stale unix socket file */
+            if (socket_stale(socket_filename()))
+            {
+                tio_printf("Cleaning up old socket file");
+                unlink(socket_filename());
+            }
+
             break;
 
         case AF_INET:
@@ -164,7 +213,7 @@ void socket_configure(void)
             break;
 
         default:
-            error_printf("Invalid socket family (%d)", socket_family);
+            tio_error_printf("Invalid socket family (%d)", socket_family);
             exit(EXIT_FAILURE);
             break;
     }
@@ -173,21 +222,31 @@ void socket_configure(void)
     sockfd = socket(socket_family, SOCK_STREAM, 0);
     if (sockfd < 0)
     {
-        error_printf("Failed to create socket (%s)", strerror(errno));
+        tio_error_printf("Failed to create socket (%s)", strerror(errno));
+        exit(EXIT_FAILURE);
+    }
+
+#if defined(SO_NOSIGPIPE) && !defined(MSG_NOSIGNAL)
+    if (setsockopt(sockfd, SOL_SOCKET, SO_REUSEADDR | SO_NOSIGPIPE, &optval, sizeof(optval)))
+#else
+    if (setsockopt(sockfd, SOL_SOCKET, SO_REUSEADDR, &optval, sizeof(optval)))
+#endif
+    {
+        tio_error_printf("Failed to set socket options (%s)", strerror(errno));
         exit(EXIT_FAILURE);
     }
 
     /* Bind */
     if (bind(sockfd, sockaddr_p, socklen) < 0)
     {
-        error_printf("Failed to bind to socket (%s)", strerror(errno));
+        tio_error_printf("Failed to bind to socket (%s)", strerror(errno));
         exit(EXIT_FAILURE);
     }
 
     /* Listen */
     if (listen(sockfd, MAX_SOCKET_CLIENTS) < 0)
     {
-        error_printf("Failed to listen on socket (%s)", strerror(errno));
+        tio_error_printf("Failed to listen on socket (%s)", strerror(errno));
         exit(EXIT_FAILURE);
     }
 
@@ -215,9 +274,14 @@ void socket_write(char input_char)
     {
         if (clientfds[i] != -1)
         {
-            if (write(clientfds[i], &input_char, 1) <= 0)
+
+#if defined(SO_NOSIGPIPE) && !defined(MSG_NOSIGNAL)
+            if (send(clientfds[i], &input_char, 1, 0) <= 0)
+#else
+            if (send(clientfds[i], &input_char, 1, MSG_NOSIGNAL) <= 0)
+#endif
             {
-                error_printf_silent("Failed to write to socket (%s)", strerror(errno));
+                tio_error_printf_silent("Failed to write to socket (%s)", strerror(errno));
                 close(clientfds[i]);
                 clientfds[i] = -1;
             }
@@ -288,16 +352,31 @@ bool socket_handle_input(fd_set *rdfs, char *output_char)
             }
             if (status < 0)
             {
-                error_printf_silent("Failed to read from socket (%s)", strerror(errno));
+                tio_error_printf_silent("Failed to read from socket (%s)", strerror(errno));
                 close(clientfds[i]);
                 clientfds[i] = -1;
                 continue;
             }
-            /* match the behavior of a terminal in raw mode */
-            if (*output_char == '\n')
+
+            /* If INLCR is set, a received NL character shall be translated into a CR character */
+            if (*output_char == '\n' && option.map_i_nl_cr)
             {
                 *output_char = '\r';
             }
+            else if (*output_char == '\r')
+            {
+                /* If IGNCR is set, a received CR character shall be ignored (not read). */
+                if (option.map_ign_cr)
+                {
+                    return false;
+                }
+
+                /* If IGNCR is not set and ICRNL is set, a received CR character shall be translated into an NL character. */
+                if (option.map_i_cr_nl)
+                {
+                    *output_char = '\n';
+                }
+            }
             return true;
         }
     }

src/socket.h

@@ -1,5 +1,5 @@
 /*
- * tio - a simple serial terminal I/O tool
+ * tio - a serial device I/O tool
  *
  * Copyright (c) 2014-2022  Martin Lund
  * Copyright (c) 2022  Google LLC

src/timestamp.c

@@ -0,0 +1,104 @@
+/*
+ * tio - a serial device I/O tool
+ *
+ * Copyright (c) 2014-2022  Martin Lund
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA.
+ */
+
+#include "config.h"
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/time.h>
+#include <time.h>
+#include "error.h"
+#include "print.h"
+#include "options.h"
+#include "timestamp.h"
+
+char *timestamp_current_time(void)
+{
+    static char time_string[TIME_STRING_SIZE_MAX];
+    static struct timeval tv, tv_now, tv_start, tv_previous;
+    static bool first = true;
+    struct tm *tm;
+    size_t len;
+
+    // Get current time value
+    gettimeofday(&tv_now, NULL);
+
+    if (first)
+    {
+        tv_start = tv_now;
+        first = false;
+    }
+
+    // Add formatted timestamp
+    switch (option.timestamp)
+    {
+        case TIMESTAMP_NONE:
+        case TIMESTAMP_24HOUR:
+            // "hh:mm:ss.sss" (24 hour format)
+            tv = tv_now;
+            tm = localtime(&tv.tv_sec);
+            len = strftime(time_string, sizeof(time_string), "%H:%M:%S", tm);
+            break;
+        case TIMESTAMP_24HOUR_START:
+            // "hh:mm:ss.sss" (24 hour format relative to start time)
+            timersub(&tv_now, &tv_start, &tv);
+            tm = gmtime(&tv.tv_sec);
+            len = strftime(time_string, sizeof(time_string), "%H:%M:%S", tm);
+            break;
+        case TIMESTAMP_24HOUR_DELTA:
+            // "hh:mm:ss.sss" (24 hour format relative to previous time stamp)
+            timersub(&tv_now, &tv_previous, &tv);
+            tm = gmtime(&tv.tv_sec);
+            len = strftime(time_string, sizeof(time_string), "%H:%M:%S", tm);
+            break;
+        case TIMESTAMP_ISO8601:
+            // "YYYY-MM-DDThh:mm:ss.sss" (ISO-8601)
+            tv = tv_now;
+            tm = localtime(&tv.tv_sec);
+            len = strftime(time_string, sizeof(time_string), "%Y-%m-%dT%H:%M:%S", tm);
+            break;
+        case TIMESTAMP_EPOCH:
+        case TIMESTAMP_EPOCH_USEC:
+            // "N.sss" (seconds since Unix epoch, 1970-01-01 00:00:00Z)
+            tv = tv_now;
+            tm = localtime(&tv.tv_sec);
+            len = strftime(time_string, sizeof(time_string), "%s", tm);
+            break;
+        default:
+            return NULL;
+    }
+
+    // Append millis-/microseconds to all timestamps
+    if (len)
+    {
+        if ( option.timestamp == TIMESTAMP_EPOCH_USEC )
+        {
+           len = snprintf(time_string + len, TIME_STRING_SIZE_MAX - len, ".%06ld", (long)tv.tv_usec);
+        }
+        else
+        {
+            len = snprintf(time_string + len, TIME_STRING_SIZE_MAX - len, ".%03ld", (long)tv.tv_usec / 1000);
+        }
+    }
+    // Save previous time value for next run
+    tv_previous = tv_now;
+
+    return (len < TIME_STRING_SIZE_MAX) ? time_string : NULL;
+}

src/timestamp.h

@@ -0,0 +1,39 @@
+/*
+ * tio - a serial device I/O tool
+ *
+ * Copyright (c) 2014-2022  Martin Lund
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA.
+ */
+
+#pragma once
+
+typedef enum
+{
+    TIMESTAMP_NONE,
+    TIMESTAMP_24HOUR,
+    TIMESTAMP_24HOUR_START,
+    TIMESTAMP_24HOUR_DELTA,
+    TIMESTAMP_ISO8601,
+    TIMESTAMP_EPOCH,
+    TIMESTAMP_EPOCH_USEC,
+    TIMESTAMP_END,
+} timestamp_t;
+
+#define TIME_STRING_SIZE_MAX 24
+
+char *timestamp_current_time(void);
+

src/tty.h

@@ -1,5 +1,5 @@
 /*
- * tio - a simple serial terminal I/O tool
+ * tio - a serial device I/O tool
  *
  * Copyright (c) 2014-2022  Martin Lund
  *
@@ -22,33 +22,65 @@
 #pragma once
 
 #include <stdbool.h>
+#include <glib.h>
 
-#define KEY_QUESTION 0x3f
-#define KEY_B 0x62
-#define KEY_C 0x63
-#define KEY_E 0x65
-#define KEY_H 0x68
-#define KEY_L 0x6C
-#define KEY_Q 0x71
-#define KEY_S 0x73
-#define KEY_T 0x74
-#define KEY_SHIFT_T 0x54
-#define KEY_CTRL_T 0x14
-#define KEY_V 0x76
-#define KEY_D 0x64
-#define KEY_R 0x72
-#define KEY_SHIFT_L 0x4C
+#define LINE_HIGH true
+#define LINE_LOW false
 
-#define NORMAL 0
-#define HEX 1
+#define TOPOLOGY_ID_SIZE 4
+
+typedef enum
+{
+    FLOW_NONE,
+    FLOW_HARD,
+    FLOW_SOFT,
+} flow_t;
+
+typedef enum
+{
+    PARITY_NONE,
+    PARITY_ODD,
+    PARITY_EVEN,
+    PARITY_MARK,
+    PARITY_SPACE,
+} parity_t;
+
+typedef enum
+{
+    AUTO_CONNECT_DIRECT,
+    AUTO_CONNECT_NEW,
+    AUTO_CONNECT_LATEST,
+    AUTO_CONNECT_END,
+} auto_connect_t;
+
+typedef struct
+{
+    char *tid;
+    double uptime;
+    char *path;
+    char *driver;
+    char *description;
+} device_t;
+
+typedef struct
+{
+    int mask;
+    int value;
+    bool reserved;
+} tty_line_config_t;
+
+extern const char *device_name;
+extern bool interactive_mode;
 
 void stdout_configure(void);
-void stdout_restore(void);
 void stdin_configure(void);
-void stdin_restore(void);
 void tty_configure(void);
+void tty_reconfigure(void);
 int tty_connect(void);
 void tty_wait_for_device(void);
 void list_serial_devices(void);
-
-extern bool interactive_mode;
+void tty_input_thread_create(void);
+void tty_input_thread_wait_ready(void);
+void tty_line_set(int fd, tty_line_config_t line_config[]);
+void tty_search(void);
+GList *tty_search_for_serial_devices(void);

src/version.h.in

@@ -0,0 +1,3 @@
+#pragma once
+
+#define VERSION "@VERSION@"

src/xymodem.c

@@ -0,0 +1,739 @@
+/*
+ * Minimalistic implementation of the xmodem-1k and ymodem sender protocol.
+ * https://en.wikipedia.org/wiki/XMODEM
+ * https://en.wikipedia.org/wiki/YMODEM
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later OR MIT-0
+ *
+ */
+
+#include <fcntl.h>
+#include <errno.h>
+#include <unistd.h>
+#include <termios.h>
+#include <sys/stat.h>
+#include <sys/mman.h>
+#include <poll.h>
+#include "xymodem.h"
+#include "print.h"
+#include "misc.h"
+
+#define SOH 0x01
+#define STX 0x02
+#define ACK 0x06
+#define NAK 0x15
+#define CAN 0x18
+#define EOT 0x04
+
+#define SOH_STR "\001"
+#define ACK_STR "\006"
+#define NAK_STR "\025"
+#define CAN_STR "\030"
+#define EOT_STR "\004"
+
+#define OK  0
+#define ERR (-1)
+#define ERR_FATAL (-2)
+#define USER_CAN  (-5)
+
+#define RX_IGNORE 5
+
+#define min(a, b)       ((a) < (b) ? (a) : (b))
+
+struct xpacket_1k {
+    uint8_t  type;
+    uint8_t  seq;
+    uint8_t  nseq;
+    uint8_t  data[1024];
+    uint8_t  crc_hi;
+    uint8_t  crc_lo;
+} __attribute__((packed));
+
+struct xpacket {
+    uint8_t  type;
+    uint8_t  seq;
+    uint8_t  nseq;
+    uint8_t  data[128];
+    uint8_t  crc_hi;
+    uint8_t  crc_lo;
+} __attribute__((packed));
+
+/* See https://en.wikipedia.org/wiki/Computation_of_cyclic_redundancy_checks */
+static uint16_t crc16(const uint8_t *data, uint16_t size)
+{
+    uint16_t crc, s;
+
+    for (crc = 0; size > 0; size--) {
+        s = *data++ ^ (crc >> 8);
+        s ^= (s >> 4);
+        crc = (crc << 8) ^ s ^ (s << 5) ^ (s << 12);
+    }
+    return crc;
+}
+
+static int xmodem_1k(int sio, const void *data, size_t len, int seq)
+{
+    struct xpacket_1k  packet;
+    const uint8_t  *buf = data;
+    char            resp = 0;
+    int             rc, crc;
+
+    /* Drain pending characters from serial line. Insist on the
+     * last drained character being 'C'.
+     */
+    while(1) {
+        if (key_hit)
+            return -1;
+        rc = read_poll(sio, &resp, 1, 50);
+        if (rc == 0) {
+            if (resp == 'C') break;
+            if (resp == CAN) return ERR;
+            continue;
+        }
+        else if (rc < 0) {
+            tio_error_print("Read sync from serial failed");
+            return ERR;
+        }
+    }
+
+    /* Always work with 1K packets */
+    packet.seq  = seq;
+    packet.type = STX;
+
+    while (len) {
+        size_t  sz, z = 0;
+        char   *from, status;
+
+        /* Build next packet, pad with 0 to full seq */
+        z = min(len, sizeof(packet.data));
+        memcpy(packet.data, buf, z);
+        memset(packet.data + z, 0, sizeof(packet.data) - z);
+        crc = crc16(packet.data, sizeof(packet.data));
+        packet.crc_hi = crc >> 8;
+        packet.crc_lo = crc;
+        packet.nseq = 0xff - packet.seq;
+
+        /* Send packet */
+        from = (char *) &packet;
+        sz =  sizeof(packet);
+        while (sz) {
+            if (key_hit)
+                return ERR;
+            if ((rc = write(sio, from, sz)) < 0 ) {
+                if (errno ==  EWOULDBLOCK) {
+                    usleep(1000);
+                    continue;
+                }
+                tio_error_print("Write packet to serial failed");
+                return ERR;
+            }
+            from += rc;
+            sz   -= rc;
+        }
+
+        /* Clear response */
+        resp = 0;
+
+        /* 'lrzsz' does not ACK ymodem's fin packet */
+        if (seq == 0 && packet.data[0] == 0) resp = ACK;
+
+        /* Read receiver response, timeout 1 s */
+        for(int n=0; n < 20; n++) {
+            if (key_hit)
+                return ERR;
+            rc = read_poll(sio, &resp, 1, 50);
+            if (rc < 0) {
+                tio_error_print("Read ack/nak from serial failed");
+                return ERR;
+            } else if(rc > 0) {
+                break;
+            }
+        }
+
+        /* Update "progress bar" */
+        switch (resp) {
+        case NAK: status = 'N'; break;
+        case ACK: status = '.'; break;
+        case 'C': status = 'C'; break;
+        case CAN: status = '!'; return ERR;
+        default:  status = '?';
+        }
+        write(STDOUT_FILENO, &status, 1);
+
+        /* Move to next block after ACK */
+        if (resp == ACK) {
+            packet.seq++;
+            len -= z;
+            buf += z;
+        }
+    }
+
+    /* Send EOT at 1 Hz until ACK or CAN received */
+    while (seq) {
+        if (key_hit)
+            return ERR;
+        if (write(sio, EOT_STR, 1) < 0) {
+            tio_error_print("Write EOT to serial failed");
+            return ERR;
+        }
+        write(STDOUT_FILENO, "|", 1);
+        /* 1s timeout */
+        rc = read_poll(sio, &resp, 1, 1000);
+        if (rc < 0) {
+            tio_error_print("Read from serial failed");
+            return ERR;
+        } else if(rc == 0) {
+            continue;
+        }
+        if (resp == ACK || resp == CAN) {
+            write(STDOUT_FILENO, "\r\n", 2);
+            return (resp == ACK) ? OK : ERR;
+        }
+    }
+    return 0; /* not reached */
+}
+
+static int xmodem(int sio, const void *data, size_t len)
+{
+    struct xpacket  packet;
+    const uint8_t  *buf = data;
+    char            resp = 0;
+    int             rc, crc;
+
+    /* Drain pending characters from serial line. Insist on the
+     * last drained character being 'C'.
+     */
+    while(1) {
+        if (key_hit)
+            return -1;
+        rc = read_poll(sio, &resp, 1, 50);
+        if (rc == 0) {
+            if (resp == 'C') break;
+            if (resp == CAN) return ERR;
+            continue;
+        }
+        else if (rc < 0) {
+            tio_error_print("Read sync from serial failed");
+            return ERR;
+        }
+    }
+
+    /* Always work with 128b packets */
+    packet.seq  = 1;
+    packet.type = SOH;
+
+    while (len) {
+        size_t  sz, z = 0;
+        char   *from, status;
+
+        /* Build next packet, pad with 0 to full seq */
+        z = min(len, sizeof(packet.data));
+        memcpy(packet.data, buf, z);
+        memset(packet.data + z, 0, sizeof(packet.data) - z);
+        crc = crc16(packet.data, sizeof(packet.data));
+        packet.crc_hi = crc >> 8;
+        packet.crc_lo = crc;
+        packet.nseq = 0xff - packet.seq;
+
+        /* Send packet */
+        from = (char *) &packet;
+        sz =  sizeof(packet);
+        while (sz) {
+            if (key_hit)
+                return ERR;
+            if ((rc = write(sio, from, sz)) < 0 ) {
+                if (errno ==  EWOULDBLOCK) {
+                    usleep(1000);
+                    continue;
+                }
+                tio_error_print("Write packet to serial failed");
+                return ERR;
+            }
+            from += rc;
+            sz   -= rc;
+        }
+
+        /* Clear response */
+        resp = 0;
+
+        /* Read receiver response, timeout 1 s */
+        for(int n=0; n < 20; n++) {
+            if (key_hit)
+                return ERR;
+            rc = read_poll(sio, &resp, 1, 50);
+            if (rc < 0) {
+                tio_error_print("Read ack/nak from serial failed");
+                return ERR;
+            } else if(rc > 0) {
+                break;
+            }
+        }
+
+        /* Update "progress bar" */
+        switch (resp) {
+        case NAK: status = 'N'; break;
+        case ACK: status = '.'; break;
+        case 'C': status = 'C'; break;
+        case CAN: status = '!'; return ERR;
+        default:  status = '?';
+        }
+        write(STDOUT_FILENO, &status, 1);
+
+        /* Move to next block after ACK */
+        if (resp == ACK) {
+            packet.seq++;
+            len -= z;
+            buf += z;
+        }
+    }
+
+    /* Send EOT at 1 Hz until ACK or CAN received */
+    while (1) {
+        if (key_hit)
+            return ERR;
+        if (write(sio, EOT_STR, 1) < 0) {
+            tio_error_print("Write EOT to serial failed");
+            return ERR;
+        }
+        write(STDOUT_FILENO, "|", 1);
+        /* 1s timeout */
+        rc = read_poll(sio, &resp, 1, 1000);
+        if (rc < 0) {
+            tio_error_print("Read from serial failed");
+            return ERR;
+        } else if(rc == 0) {
+            continue;
+        }
+        if (resp == ACK || resp == CAN) {
+            write(STDOUT_FILENO, "\r\n", 2);
+            return (resp == ACK) ? OK : ERR;
+        }
+    }
+    return 0; /* not reached */
+}
+
+int start_receive(int sio)
+{
+    int rc;
+    struct pollfd fds;
+    fds.events = POLLIN;
+    fds.fd = sio;
+    for (int n = 0; n < 20; n++)
+    {
+        /* Send the 'C' byte until the sender of the file responds with
+           something.  The start character will be sent once a second for a number of
+           seconds.  If nothing is received in that time then return false to indicate
+           that the transfer did not start. */
+        rc = write(sio, "C", 1);
+        if (rc < 0) {
+            if (errno ==  EWOULDBLOCK) {
+                usleep(1000);
+                continue;
+            }
+            tio_error_print("Write packet to serial failed");
+            return ERR;
+        }
+        /* Wait until data is available */
+        rc = poll(&fds, 1, 3000);
+        if (rc < 0)
+        {
+            tio_error_print("%s", strerror(errno));
+            return rc;
+        }
+        else if (rc > 0)
+        {
+            if (fds.revents & POLLIN)
+            {
+                return rc;
+            }
+        }
+        if (key_hit)
+            return USER_CAN;
+    }
+    return rc;
+}
+
+uint16_t update_CRC(uint16_t crc, char data_char) 
+{
+    uint8_t data = data_char;
+    crc = crc ^ ((uint16_t)data << 8);
+    for (int ix = 0; (ix < 8); ix++)
+    {
+        if (crc & 0x8000)
+        {
+            crc = (crc << 1) ^ 0x1021;
+        }
+        else
+        {
+            crc <<= 1;
+        }
+    }
+    return crc;
+}
+
+int receive_packet(int sio, struct xpacket packet, int fd)
+{
+    char rxSeq1, rxSeq2 = 0;
+    char resp = 0;
+    uint16_t calcCrc = 0;
+    uint16_t rxCrc = 0;
+    int rc;
+
+    struct pollfd fds;
+    fds.events = POLLIN;
+    fds.fd = sio;
+
+    /* Read seq bytes*/
+    rc = read_poll(sio, &rxSeq1, 1, 3000);
+    if (rc == 0) {
+        tio_error_print("Timeout waiting for first seq byte");
+        return ERR;
+    } else if (rc < 0) {
+        tio_error_print("Error reading first seq byte")
+        return ERR_FATAL;
+    }
+    rc = read_poll(sio, &rxSeq2, 1, 3000);
+    if (rc == 0) {
+        tio_error_print("Timeout waiting for second seq byte");
+        return ERR;
+    } else if (rc < 0) {
+        tio_error_print("Error reading second seq byte")
+        return ERR_FATAL;
+    }
+    if (key_hit)
+            return USER_CAN;
+
+    /* Read packet Data */
+    for (unsigned ix = 0; (ix < sizeof(packet.data)); ix++)
+    {
+        rc = read_poll(sio, &resp, 1, 3000);
+        /* If the read times out or fails then fail this packet. */ 
+        if (rc == 0)
+        {
+            tio_error_print("Timeout waiting for next packet char");
+            rc = write(sio, CAN_STR, 1);
+            if (rc < 0) {
+                tio_error_print("Write cancel packet to serial failed");
+                return ERR_FATAL;
+            }
+            return ERR;
+        } else if (rc < 0) {
+            tio_error_print("Error reading next packet char")
+            rc = write(sio, CAN_STR, 1);
+            if (rc < 0) {
+                tio_error_print("Write cancel packet to serial failed");
+            }
+            return ERR_FATAL;
+        }
+        packet.data[ix] = (uint8_t) resp;
+        calcCrc = update_CRC(calcCrc, resp);
+        if (key_hit)
+            return USER_CAN;
+    }
+
+    /* Read CRC */
+    rc = read_poll(sio, &resp, 1, 3000);
+    if (rc == 0) {
+        tio_error_print("Timeout waiting for first CRC byte");
+        return ERR;
+    } else if (rc < 0) {
+        tio_error_print("Error reading first CRC byte")
+        return ERR_FATAL;
+    }
+
+    uint8_t uresp = resp;
+    uint16_t uresp16 = uresp;
+    rxCrc  = uresp16 << 8;
+
+    rc = read_poll(sio, &resp, 1, 3000);
+    if (rc == 0) {
+        tio_error_print("Timeout waiting for second CRC byte");
+        return ERR;
+    } else if (rc < 0) {
+        tio_error_print("Error reading second CRC byte")
+        return ERR_FATAL;
+    }
+    
+    uresp = resp;
+    uresp16 = uresp;
+    rxCrc |= uresp16;
+
+    if (key_hit)
+            return USER_CAN;
+
+    /* At this point in the code, there should not be anything in the receive buffer
+    because the sender has just sent a complete packet and is waiting on a response. */
+    rc = poll(&fds, 1, 10);
+    if (rc < 0)
+    {
+        tio_error_print("%s", strerror(errno));
+        tio_error_print("Poll check error after packet finish");
+        rc = write(sio, CAN_STR, 1);
+        if (rc < 0) {
+            tio_error_print("Write cancel packet to serial failed");
+        }
+        return ERR_FATAL;
+    }
+    else if (rc > 0)
+    {
+        if (fds.revents & POLLIN)
+        {
+            tio_error_print("RX sync error");
+            char dummy = 0;
+            /* Drain buffer */
+            while (read_poll(sio, &dummy, 1, 100) > 0) {}
+            return ERR;
+        }
+    }
+
+    uint8_t tester = 0xff;
+    uint8_t seq1 = rxSeq1;
+    uint8_t seq2 = rxSeq2;
+
+    if ((calcCrc == rxCrc) && (seq1 == packet.seq - 1) && ((seq1 ^ seq2) == tester))
+    {
+        /* Resend of previously processed packet. */
+        rc = write(sio, ACK_STR, 1);
+        if (rc < 0) {
+            tio_error_print("Write acknowlegdement packet to serial failed");
+            return ERR_FATAL;
+        }
+        return RX_IGNORE;
+    }
+    else if ((calcCrc != rxCrc) || (seq1 != packet.seq) || ((seq1 ^ seq2) != tester))
+    {
+        /* Fail if the CRC or sequence number is not correct or if the two received
+           sequence numbers are not the complement of one another. */
+        tio_error_print("Bad CRC or sequence number");
+        tio_debug_printf("CRC read: %u", rxCrc);
+        tio_debug_printf("CRC calculated: %u", calcCrc);
+        tio_debug_printf("Seq read: %hhu", rxSeq1);
+        tio_debug_printf("Seq should be: %hhu", packet.seq);
+        tio_debug_printf("inv seq: %hhu", rxSeq2);
+        return ERR;
+    }
+    else
+    {
+        /* The data is good.  Process the packet then ACK it to the sender. */
+        rc = write(fd, packet.data, sizeof(packet.data));
+        if (rc < 0)
+        {
+            tio_error_print("Problem writing to file");
+            rc = write(sio, CAN_STR, 1);
+            if (rc < 0) {
+                tio_error_print("Write cancel packet to serial failed");
+            }
+            return ERR_FATAL;
+        }
+        rc = write(sio, ACK_STR, 1);
+        if (rc < 0)
+        {
+            tio_error_print("Write acknowlegdement packet to serial failed");
+            return ERR_FATAL;
+        }
+    }
+
+    return OK;
+}
+
+int xmodem_receive(int sio, int fd)
+{
+    struct xpacket  packet;
+    char            resp = 0;
+    int             rc;
+    bool complete = false;
+    char status;
+
+    /* Drain pending characters from serial line.*/
+    while(1) {
+        if (key_hit)
+            return -1;
+        rc = read_poll(sio, &resp, 1, 50);
+        if (rc == 0) {
+            if (resp == CAN) return ERR;
+            break;
+        }
+        else if (rc < 0) {
+            if (rc != USER_CAN) {
+                tio_error_print("Read sync from serial failed");
+            }
+            return ERR;
+        }
+    }
+
+    /* Always work with 128b packets */
+    packet.seq  = 1;
+    packet.type = SOH;
+
+    /* Start Receive*/
+    rc = start_receive(sio);
+    if (rc == 0)
+    {
+        tio_error_print("Timeout waiting for transfer to start");
+        return ERR;
+    } else if (rc < 0) {
+        tio_error_print("Error starting XMODEM receive");
+        return ERR;
+    }
+
+    while (!complete) {
+        /* Poll for 1 new byte for 3 seconds */
+        rc = read_poll(sio, &resp, 1, 3000);
+        if (rc == 0) {
+            tio_error_print("Timeout waiting for start of next packet");
+            return ERR;
+        } else if (rc < 0) {
+            tio_error_print("Error reading start of next packet")
+            return ERR;
+        }
+        if (key_hit)
+            return USER_CAN;
+
+        switch(resp)
+        {
+            case SOH:
+            /* Start of a packet */
+            rc = receive_packet(sio, packet, fd);
+            if (rc == OK) {
+                packet.seq++;
+                status = '.';
+            } else if (rc == ERR) {
+                rc = write(sio, NAK_STR, 1);
+                if (rc < 0) {
+                    tio_error_print("Writing not acknowledge packet to serial failed");
+                    return ERR;
+                }
+                status = 'N';
+            } else if (rc == ERR_FATAL) {
+                tio_error_print("Receive cancelled due to fatal error");
+                return ERR;
+            } else if (rc == USER_CAN) {
+                rc = write(sio, CAN_STR, 1);
+                if (rc < 0) {
+                    tio_error_print("Writing cancel to serial failed");
+                    return ERR;
+                }
+                return USER_CAN;
+            } else if (rc == RX_IGNORE) {
+                status = ':';
+            }
+            break;
+
+            case EOT:
+            /* End of Transfer */
+            rc = write(sio, ACK_STR, 1);
+            if (rc < 0)
+            {
+                tio_error_print("Write acknowlegdement packet to serial failed");
+                return ERR;
+            }
+            complete = true;
+            status = '\0';
+            write(STDOUT_FILENO, "|\r\n", 3);
+            break;
+
+            case CAN:
+            /* Cancel from sender */
+            tio_error_print("Transmission cancelled from sender");
+            return ERR;
+            break;
+
+            default:
+            tio_error_print("Unexpected character received waiting for next packet");
+            return ERR;
+            break;
+        }
+        
+
+        /* Update "progress bar" */
+        write(STDOUT_FILENO, &status, 1);
+    }
+    return OK;
+}
+
+int xymodem_send(int sio, const char *filename, modem_mode_t mode)
+{
+    size_t         len;
+    int            rc, fd;
+    struct stat    stat;
+    const uint8_t *buf;
+
+    /* Open file, map into memory */
+    fd = open(filename, O_RDONLY);
+    if (fd < 0) {
+        tio_error_print("Could not open file");
+        return ERR;
+    }
+    fstat(fd, &stat);
+    len = stat.st_size;
+    buf = mmap(NULL, len, PROT_READ, MAP_PRIVATE, fd, 0);
+    if (!buf) {
+        close(fd);
+        tio_error_print("Could not mmap file");
+        return ERR;
+    }
+
+    /* Do transfer */
+    key_hit = 0;
+    if (mode == XMODEM_1K) {
+        rc = xmodem_1k(sio, buf, len, 1);
+    }
+    else if (mode == XMODEM_CRC) {
+        rc = xmodem(sio, buf, len);
+    }
+    else {
+        /* Ymodem: hdr + file + fin */
+        while(1) {
+            char hdr[1024], *p;
+
+            rc = -1;
+            if (strlen(filename) > 977) break; /* hdr block overrun */
+            p  = stpncpy(hdr, filename, 1024) + 1;
+            p += sprintf(p, "%ld %lo %o", len, stat.st_mtime, stat.st_mode);
+
+            if (xmodem_1k(sio, hdr, p - hdr, 0) < 0) break; /* hdr with metadata */
+            if (xmodem_1k(sio, buf, len,     1) < 0) break; /* xmodem file */
+            if (xmodem_1k(sio, "",  1,       0) < 0) break; /* empty hdr = fin */
+            rc = 0;                               break;
+        }
+    }
+    key_hit = 0xff;
+
+    /* Flush serial and release resources */
+    tcflush(sio, TCIOFLUSH);
+    munmap((void *)buf, len);
+    close(fd);
+    return rc;
+}
+
+int xymodem_receive(int sio, const char *filename, modem_mode_t mode)
+{
+    int            rc, fd;
+
+    /* Create new file */
+    fd = open(filename, O_WRONLY | O_CREAT | O_TRUNC, 0664);
+    if (fd < 0) {
+        tio_error_print("Could not open file");
+        return ERR;
+    }
+
+    /* Do transfer */
+    key_hit = 0;
+    if (mode == XMODEM_1K) {
+        tio_error_print("Not supported");
+        rc = -1;
+    }
+    else if (mode == XMODEM_CRC) {
+        rc = xmodem_receive(sio, fd);
+    }
+    else {
+        tio_error_print("Not supported");
+        rc = -1;
+    }
+    key_hit = 0xff;
+
+    /* Flush serial and release resources */
+    tcflush(sio, TCIOFLUSH);
+    close(fd);
+    return rc;
+}

src/xymodem.h

@@ -0,0 +1,34 @@
+/*
+ * tio - a serial device I/O tool
+ *
+ * Copyright (c) 2014-2024  Martin Lund
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA.
+ */
+
+#pragma once
+
+typedef enum {
+    XMODEM_1K,
+    XMODEM_CRC,
+    YMODEM,
+} modem_mode_t;
+
+extern char key_hit;
+
+int xymodem_send(int sio, const char *filename, modem_mode_t mode);
+
+int xymodem_receive(int sio, const char *filename, modem_mode_t mode);

subprojects/libinih.wrap

@@ -1,4 +0,0 @@
-[wrap-git]
-directory=libinih
-url=https://github.com/benhoyt/inih.git
-revision=r55