Re: Is there a way to unset inferior-tty?

[Simon Marchi <simon.marchi@polymtl.ca>]

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On 2016-07-01 14:51, Pedro Alves wrote:
> I think this should just be fixed to work.
> 
> The fix should be very similar to this:
> 
> 
> https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=811a659a779fdf93293fe1105d99e9db171a8b68
> 
> Thanks,
> Pedro Alves

Hi Marc,

Here's a patch.  If you like it I'll submit it to gdb-patches with 
ChangeLog and all.

That made me realize there is an alias for this, you can use "tty 
/dev/pts/X", which is equivalent to "set inferior-tty /dev/pts/X".  
There, I just saved you about 1 hour of typing per day :).

Simon

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From 139d8e7ccc24e0efaa84ad9424f318d55dfe9eea Mon Sep 17 00:00:00 2001
From: Simon Marchi <simon.marchi@polymtl.ca>
Date: Fri, 1 Jul 2016 21:23:28 -0400
Subject: [PATCH] Allow resetting an empty inferior-tty

This patch allows the user to set the inferior-tty to "empty", in order
to come back to the default behaviour of using the same tty as gdb is
using.
---
 gdb/infcmd.c | 16 ++++++++++------
 1 file changed, 10 insertions(+), 6 deletions(-)

diff --git a/gdb/infcmd.c b/gdb/infcmd.c
index 58ba1cb..97a1e35 100644
--- a/gdb/infcmd.c
+++ b/gdb/infcmd.c
@@ -151,7 +151,11 @@ void
 set_inferior_io_terminal (const char *terminal_name)
 {
   xfree (current_inferior ()->terminal);
-  current_inferior ()->terminal = terminal_name ? xstrdup (terminal_name) : 0;
+
+  if (terminal_name != NULL && strlen (terminal_name) > 0)
+    current_inferior ()->terminal = xstrdup (terminal_name);
+  else
+    current_inferior ()->terminal = NULL;
 }
 
 const char *
@@ -3224,14 +3228,14 @@ _initialize_infcmd (void)
   const char *cmd_name;
 
   /* Add the filename of the terminal connected to inferior I/O.  */
-  add_setshow_filename_cmd ("inferior-tty", class_run,
-			    &inferior_io_terminal_scratch, _("\
+  add_setshow_optional_filename_cmd ("inferior-tty", class_run,
+				     &inferior_io_terminal_scratch, _("\
 Set terminal for future runs of program being debugged."), _("\
 Show terminal for future runs of program being debugged."), _("\
 Usage: set inferior-tty /dev/pts/1"),
-			    set_inferior_tty_command,
-			    show_inferior_tty_command,
-			    &setlist, &showlist);
+				     set_inferior_tty_command,
+				     show_inferior_tty_command,
+				     &setlist, &showlist);
   add_com_alias ("tty", "set inferior-tty", class_alias, 0);
 
   cmd_name = "args";
-- 
2.9.0