Added key command for showing session settings

A new key command "ctrl-t i" is added to allow the user to display the
various session settings information (baudrate, databits, log file, etc.).

This is usefull in case you have a running session but have forgotten
what the settings are.

man/tio.1

@@ -61,6 +61,8 @@ Display help.
 .PP
 .TP 16n
 In session, the following key sequences are intercepted as tio commands:
+.IP "\fBctrl-t i"
+Show session settings information (baudrate, databits, etc.)
 .IP "\fBctrl-t q"
 Quit
 .IP "\fBctrl-t s"
@@ -70,11 +72,11 @@ Send ctrl-t key code
 
 .SH "EXAMPLES"
 .TP
-The most common use is without options. For example:
+A typical use is without options. For example:
 
 tio /dev/ttyUSB0
 .TP
-Which corresponds to:
+Which corresponds to the commonly used options:
 
 tio \-b 115200 \-d 8 \-f none \-s 1 \-p none /dev/ttyUSB0
 .TP

src/include/tio/options.h

@@ -36,6 +36,11 @@ struct option_t
     bool no_autoconnect;
     int output_delay;
     struct termios tio;
+    int baudrate;
+    int databits;
+    char *flow;
+    int stopbits;
+    char *parity;
 };
 
 extern struct option_t option;

src/include/tio/tty.h

@@ -22,6 +22,7 @@
 #ifndef TTY_H
 #define TTY_H
 
+#define KEY_I 0x69
 #define KEY_Q 0x71
 #define KEY_S 0x73
 #define KEY_T 0x74

src/options.c

@@ -39,6 +39,12 @@ struct option_t option =
     "",       // Log filename
     false,    // No autoconnect
     0,        // No output delay
+    {},
+    115200,   // Baudrate
+    8,        // Databits
+    "none",   // Flow
+    1,        // Stopbits
+    "none"    // Parity
 };
 
 void print_options_help(char *argv[])
@@ -65,8 +71,6 @@ void parse_options(int argc, char *argv[])
 {
     int c;
     int baudrate;
-    int databits;
-    int stopbits;
 
     if (argc == 1)
     {
@@ -122,7 +126,7 @@ void parse_options(int argc, char *argv[])
                 break;
 
             case 'b':
-                baudrate = atoi(optarg);
+                option.baudrate = baudrate = atoi(optarg);
                 switch (baudrate)
                 {
                     case 0:
@@ -223,9 +227,9 @@ void parse_options(int argc, char *argv[])
                 break;
 
             case 'd':
-                databits = atoi(optarg);
+                option.databits = atoi(optarg);
                 option.tio.c_cflag &= ~CSIZE;
-                switch (databits)
+                switch (option.databits)
                 {
                     case 5:
                         option.tio.c_cflag |= CS5;
@@ -246,6 +250,8 @@ void parse_options(int argc, char *argv[])
                 break;
 
             case 'f':
+                option.flow = optarg;
+
                 if (strcmp("hard", optarg) == 0)
                 {
                     option.tio.c_cflag |= CRTSCTS;
@@ -269,8 +275,8 @@ void parse_options(int argc, char *argv[])
                 break;
 
             case 's':
-                stopbits = atoi(optarg);
+                option.stopbits = atoi(optarg);
-                switch (stopbits)
+                switch (option.stopbits)
                 {
                     case 1:
                         option.tio.c_cflag &= ~CSTOPB;
@@ -285,6 +291,8 @@ void parse_options(int argc, char *argv[])
                 break;
 
             case 'p':
+                option.parity = optarg;
+
                 if (strcmp("odd", optarg) == 0)
                 {
                     option.tio.c_cflag |= PARENB;

src/tty.c

@@ -62,6 +62,21 @@ void handle_command_sequence(char input_char, char previous_char, char *output_c
     {
         switch (input_char)
         {
+            case KEY_I:
+                if (tainted)
+                    putchar('\n');
+                color_printf("[tio %s] TTY device: %s", current_time(), option.tty_device);
+                color_printf("[tio %s] Baudrate: %d", current_time(), option.baudrate);
+                color_printf("[tio %s] Databits: %d", current_time(), option.databits);
+                color_printf("[tio %s] Flow: %s", current_time(), option.flow);
+                color_printf("[tio %s] Stopbits: %d", current_time(), option.stopbits);
+                color_printf("[tio %s] Parity: %s", current_time(), option.parity);
+                color_printf("[tio %s] Output delay: %d", current_time(), option.output_delay);
+                if (option.log)
+                    color_printf("[tio %s] Log file: %s", current_time(), option.log_filename);
+                tainted = false;
+                *forward = false;
+                break;
             case KEY_Q:
                 /* Exit upon ctrl-t q sequence */
                 exit(EXIT_SUCCESS);