path: root/drivers/char/n_tty.c
diff options
authorJoe Peterson <joe@skyrush.com>2008-02-06 01:37:38 -0800
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2008-02-06 10:41:07 -0800
commitec5b1157f8e819c72fc93aa6d2d5117c08cdc961 (patch)
tree86b6681763849672f997cdf8277de61b3ea0cf0f /drivers/char/n_tty.c
parent1a669c2f16d478cb7f4452e5fb8d09320831f4a1 (diff)
tty: enable the echoing of ^C in the N_TTY discipline
Turn on INTR/QUIT/SUSP echoing in the N_TTY line discipline (e.g. ctrl-C will appear as "^C" if stty echoctl is set and ctrl-C is set as INTR). Linux seems to be the only unix-like OS (recently I've verified this on Solaris, BSD, and Mac OS X) that does *not* behave this way, and I really miss this as a good visual confirmation of the interrupt of a program in the console or xterm. I remember this fondly from many Unixs I've used over the years as well. Bringing this to Linux also seems like a good way to make it yet more compliant with standard unix-like behavior. [akpm@linux-foundation.org: coding-style fixes] Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/char/n_tty.c')
1 files changed, 15 insertions, 1 deletions
diff --git a/drivers/char/n_tty.c b/drivers/char/n_tty.c
index 596c7173997b..e0e3815f92ba 100644
--- a/drivers/char/n_tty.c
+++ b/drivers/char/n_tty.c
@@ -769,7 +769,21 @@ static inline void n_tty_receive_char(struct tty_struct *tty, unsigned char c)
signal = SIGTSTP;
if (c == SUSP_CHAR(tty)) {
- isig(signal, tty, 0);
+ /*
+ * Echo character, and then send the signal.
+ * Note that we do not use isig() here because we want
+ * the order to be:
+ * 1) flush, 2) echo, 3) signal
+ */
+ if (!L_NOFLSH(tty)) {
+ n_tty_flush_buffer(tty);
+ if (tty->driver->flush_buffer)
+ tty->driver->flush_buffer(tty);
+ }
+ if (L_ECHO(tty))
+ echo_char(c, tty);
+ if (tty->pgrp)
+ kill_pgrp(tty->pgrp, signal, 1);