From 74a543b263a8090604a9085d801e0ef0919a4ac2 Mon Sep 17 00:00:00 2001
From: Adam Borowski <kilobyte@angband.pl>
Date: Mon, 10 Apr 2017 01:05:40 +0200
Subject: [PATCH] 'ctrl-t b' to send serial break.

---
 man/tio.1             | 2 ++
 src/include/tio/tty.h | 1 +
 src/tty.c             | 4 ++++
 3 files changed, 7 insertions(+)

diff --git a/man/tio.1 b/man/tio.1
index 628723b..ce0fc70 100644
--- a/man/tio.1
+++ b/man/tio.1
@@ -70,6 +70,8 @@ Display help.
 In session, the following key sequences are intercepted as tio commands:
 .IP "\fBctrl-t ?"
 List available key commands
+.IP "\fBctrl-t b"
+Send serial break (triggers SysRq on Linux, etc.)
 .IP "\fBctrl-t c"
 Show configuration (baudrate, databits, etc.)
 .IP "\fBctrl-t l"
diff --git a/src/include/tio/tty.h b/src/include/tio/tty.h
index c2fd813..9941604 100644
--- a/src/include/tio/tty.h
+++ b/src/include/tio/tty.h
@@ -23,6 +23,7 @@
 #define TTY_H
 
 #define KEY_QUESTION 0x3f
+#define KEY_B 0x62
 #define KEY_C 0x63
 #define KEY_L 0x6C
 #define KEY_Q 0x71
diff --git a/src/tty.c b/src/tty.c
index c4d52b4..3324d76 100644
--- a/src/tty.c
+++ b/src/tty.c
@@ -76,6 +76,7 @@ void handle_command_sequence(char input_char, char previous_char, char *output_c
             case KEY_QUESTION:
                 tio_printf("Key commands:");
                 tio_printf(" ctrl-t ?   List available key commands");
+                tio_printf(" ctrl-t b   Send break");
                 tio_printf(" ctrl-t c   Show configuration");
                 tio_printf(" ctrl-t l   Clear screen");
                 tio_printf(" ctrl-t q   Quit");
@@ -83,6 +84,9 @@ void handle_command_sequence(char input_char, char previous_char, char *output_c
                 tio_printf(" ctrl-t t   Send ctrl-t key code");
                 *forward = false;
                 break;
+            case KEY_B:
+                tcsendbreak(fd, 0);
+                break;
             case KEY_C:
                 tio_printf("Configuration:");
                 tio_printf(" TTY device: %s", option.tty_device);