Use DEV_TTY more consistently

* src/conf_post.h (DEV_TTY): Move from here ...
* src/keyboard.c, src/keyboard.h: ... to here, as it doesn’t need
to be visible everywhere.  Make it a constant.
* src/keyboard.c (handle_interrupt, Fset_quit_char):
* src/process.c (create_process): Prefer DEV_TTY to "/dev/tty".

1 files changed, 1 insertions, 1 deletions

diff --git a/src/process.c b/src/process.c
index 344a886be19..989511967ce 100644
--- a/src/process.c
+++ b/src/process.c
@@ -1917,7 +1917,7 @@ create_process (Lisp_Object process, char **new_argv, Lisp_Object current_dir)
         {
           /* I wonder: would just ioctl (0, TIOCNOTTY, 0) work here?
              I can't test it since I don't have 4.3.  */
-          int j = emacs_open ("/dev/tty", O_RDWR, 0);
+          int j = emacs_open (DEV_TTY, O_RDWR, 0);
           if (j >= 0)
             {
               ioctl (j, TIOCNOTTY, 0);