From 59a537f7dd08276d0115042ac89ccb2ae6b6cc3d Mon Sep 17 00:00:00 2001
From: Martin Lund <martin.lund@keep-it-simple.com>
Date: Fri, 20 May 2016 20:10:12 +0200
Subject: [PATCH] Added 'ctrl-t ?' to list available commands

---
 man/tio.1             | 6 ++++--
 src/include/tio/tty.h | 1 +
 src/tty.c             | 9 +++++++++
 3 files changed, 14 insertions(+), 2 deletions(-)

diff --git a/man/tio.1 b/man/tio.1
index 38f1e84..4fd81ab 100644
--- a/man/tio.1
+++ b/man/tio.1
@@ -61,12 +61,14 @@ Display help.
 .PP
 .TP 16n
 In session, the following key sequences are intercepted as tio commands:
+.IP "\fBctrl-t ?"
+List available key commands
 .IP "\fBctrl-t i"
-Show session settings information (baudrate, databits, etc.)
+Show settings information (baudrate, databits, etc.)
 .IP "\fBctrl-t q"
 Quit
 .IP "\fBctrl-t s"
-Show session statistics (total number of bytes transmitted/received)
+Show statistics (total number of bytes transmitted/received)
 .IP "\fBctrl-t t"
 Send ctrl-t key code
 
diff --git a/src/include/tio/tty.h b/src/include/tio/tty.h
index 61c8487..0e4d651 100644
--- a/src/include/tio/tty.h
+++ b/src/include/tio/tty.h
@@ -22,6 +22,7 @@
 #ifndef TTY_H
 #define TTY_H
 
+#define KEY_QUESTION 0x3f
 #define KEY_I 0x69
 #define KEY_Q 0x71
 #define KEY_S 0x73
diff --git a/src/tty.c b/src/tty.c
index 8348914..63d8eed 100644
--- a/src/tty.c
+++ b/src/tty.c
@@ -69,6 +69,15 @@ void handle_command_sequence(char input_char, char previous_char, char *output_c
     {
         switch (input_char)
         {
+            case KEY_QUESTION:
+                tio_printf("Key commands:");
+                tio_printf(" ctrl-t ?   List available key commands");
+                tio_printf(" ctrl-t i   Show settings information");
+                tio_printf(" ctrl-t q   Quit");
+                tio_printf(" ctrl-t s   Show statistics");
+                tio_printf(" ctrl-t t   Send ctrl-t key code");
+                *forward = false;
+                break;
             case KEY_I:
                 tio_printf("Settings information:");
                 tio_printf(" TTY device: %s", option.tty_device);