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| author | Joe Peterson <joe@skyrush.com> | 2008-04-30 00:53:30 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-04-30 08:29:40 -0700 |
| commit | 575537b3248ee9b7578a3bb3df33fcdda2bfc4d5 (patch) | |
| tree | 91a7f0c1afaf55772d2cfa20ecfd52f320a05a5a | |
| parent | 47f86834bbd4193139d61d659bebf9ab9d691e37 (diff) | |
| download | blackbird-op-linux-575537b3248ee9b7578a3bb3df33fcdda2bfc4d5.tar.gz blackbird-op-linux-575537b3248ee9b7578a3bb3df33fcdda2bfc4d5.zip | |
Resume TTY on SUSP and fix CRNL order in N_TTY line discipline
Refine these behaviors in the N_TTY line discipline:
1) Handle the signal characters consistently when received in a stopped TTY
so that SUSP (typically ctrl-Z) behaves like INTR and QUIT in resuming a
stopped TTY.
2) Adjust the order in which the IGNCR/ICRNL/INLCR processing is applied to
be more logical and consistent with the behavior of other Unix systems.
Signed-off-by: Joe Peterson <joe@skyrush.com>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: Oleg Nesterov <oleg@tv-sign.ru>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | drivers/char/n_tty.c | 19 |
1 files changed, 11 insertions, 8 deletions
diff --git a/drivers/char/n_tty.c b/drivers/char/n_tty.c index 001d9d875387..e1518e17e09d 100644 --- a/drivers/char/n_tty.c +++ b/drivers/char/n_tty.c @@ -708,7 +708,7 @@ static inline void n_tty_receive_char(struct tty_struct *tty, unsigned char c) if (tty->stopped && !tty->flow_stopped && I_IXON(tty) && ((I_IXANY(tty) && c != START_CHAR(tty) && c != STOP_CHAR(tty)) || - c == INTR_CHAR(tty) || c == QUIT_CHAR(tty))) + c == INTR_CHAR(tty) || c == QUIT_CHAR(tty) || c == SUSP_CHAR(tty))) start_tty(tty); if (tty->closing) { @@ -746,13 +746,6 @@ static inline void n_tty_receive_char(struct tty_struct *tty, unsigned char c) return; } - if (c == '\r') { - if (I_IGNCR(tty)) - return; - if (I_ICRNL(tty)) - c = '\n'; - } else if (c == '\n' && I_INLCR(tty)) - c = '\r'; if (I_IXON(tty)) { if (c == START_CHAR(tty)) { start_tty(tty); @@ -763,6 +756,7 @@ static inline void n_tty_receive_char(struct tty_struct *tty, unsigned char c) return; } } + if (L_ISIG(tty)) { int signal; signal = SIGINT; @@ -792,6 +786,15 @@ send_signal: return; } } + + if (c == '\r') { + if (I_IGNCR(tty)) + return; + if (I_ICRNL(tty)) + c = '\n'; + } else if (c == '\n' && I_INLCR(tty)) + c = '\r'; + if (tty->icanon) { if (c == ERASE_CHAR(tty) || c == KILL_CHAR(tty) || (c == WERASE_CHAR(tty) && L_IEXTEN(tty))) { |
