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-rw-r--r--drivers/char/n_tty.c17
-rw-r--r--drivers/char/pty.c21
-rw-r--r--drivers/char/tty_ioctl.c18
3 files changed, 47 insertions, 9 deletions
diff --git a/drivers/char/n_tty.c b/drivers/char/n_tty.c
index bdae8327143..428f4fe0b5f 100644
--- a/drivers/char/n_tty.c
+++ b/drivers/char/n_tty.c
@@ -1102,6 +1102,11 @@ static inline void n_tty_receive_char(struct tty_struct *tty, unsigned char c)
if (I_IUCLC(tty) && L_IEXTEN(tty))
c = tolower(c);
+ if (L_EXTPROC(tty)) {
+ put_tty_queue(c, tty);
+ return;
+ }
+
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 != SUSP_CHAR(tty)) {
@@ -1409,7 +1414,8 @@ static void n_tty_receive_buf(struct tty_struct *tty, const unsigned char *cp,
n_tty_set_room(tty);
- if (!tty->icanon && (tty->read_cnt >= tty->minimum_to_wake)) {
+ if ((!tty->icanon && (tty->read_cnt >= tty->minimum_to_wake)) ||
+ L_EXTPROC(tty)) {
kill_fasync(&tty->fasync, SIGIO, POLL_IN);
if (waitqueue_active(&tty->read_wait))
wake_up_interruptible(&tty->read_wait);
@@ -1585,7 +1591,7 @@ static int n_tty_open(struct tty_struct *tty)
static inline int input_available_p(struct tty_struct *tty, int amt)
{
tty_flush_to_ldisc(tty);
- if (tty->icanon) {
+ if (tty->icanon && !L_EXTPROC(tty)) {
if (tty->canon_data)
return 1;
} else if (tty->read_cnt >= (amt ? amt : 1))
@@ -1632,6 +1638,11 @@ static int copy_from_read_buf(struct tty_struct *tty,
spin_lock_irqsave(&tty->read_lock, flags);
tty->read_tail = (tty->read_tail + n) & (N_TTY_BUF_SIZE-1);
tty->read_cnt -= n;
+ /* Turn single EOF into zero-length read */
+ if (L_EXTPROC(tty) && tty->icanon && n == 1) {
+ if (!tty->read_cnt && (*b)[n-1] == EOF_CHAR(tty))
+ n--;
+ }
spin_unlock_irqrestore(&tty->read_lock, flags);
*b += n;
*nr -= n;
@@ -1812,7 +1823,7 @@ do_it_again:
nr--;
}
- if (tty->icanon) {
+ if (tty->icanon && !L_EXTPROC(tty)) {
/* N.B. avoid overrun if nr == 0 */
while (nr && tty->read_cnt) {
int eol;
diff --git a/drivers/char/pty.c b/drivers/char/pty.c
index d83a43130df..b640ef29be1 100644
--- a/drivers/char/pty.c
+++ b/drivers/char/pty.c
@@ -171,6 +171,23 @@ static int pty_set_lock(struct tty_struct *tty, int __user *arg)
return 0;
}
+/* Send a signal to the slave */
+static int pty_signal(struct tty_struct *tty, int sig)
+{
+ unsigned long flags;
+ struct pid *pgrp;
+
+ if (tty->link) {
+ spin_lock_irqsave(&tty->link->ctrl_lock, flags);
+ pgrp = get_pid(tty->link->pgrp);
+ spin_unlock_irqrestore(&tty->link->ctrl_lock, flags);
+
+ kill_pgrp(pgrp, sig, 1);
+ put_pid(pgrp);
+ }
+ return 0;
+}
+
static void pty_flush_buffer(struct tty_struct *tty)
{
struct tty_struct *to = tty->link;
@@ -321,6 +338,8 @@ static int pty_bsd_ioctl(struct tty_struct *tty, struct file *file,
switch (cmd) {
case TIOCSPTLCK: /* Set PT Lock (disallow slave open) */
return pty_set_lock(tty, (int __user *) arg);
+ case TIOCSIG: /* Send signal to other side of pty */
+ return pty_signal(tty, (int) arg);
}
return -ENOIOCTLCMD;
}
@@ -476,6 +495,8 @@ static int pty_unix98_ioctl(struct tty_struct *tty, struct file *file,
return pty_set_lock(tty, (int __user *)arg);
case TIOCGPTN: /* Get PT Number */
return put_user(tty->index, (unsigned int __user *)arg);
+ case TIOCSIG: /* Send signal to other side of pty */
+ return pty_signal(tty, (int) arg);
}
return -ENOIOCTLCMD;
diff --git a/drivers/char/tty_ioctl.c b/drivers/char/tty_ioctl.c
index 6bd5f8866c7..0c188997145 100644
--- a/drivers/char/tty_ioctl.c
+++ b/drivers/char/tty_ioctl.c
@@ -517,19 +517,25 @@ static void change_termios(struct tty_struct *tty, struct ktermios *new_termios)
/* See if packet mode change of state. */
if (tty->link && tty->link->packet) {
+ int extproc = (old_termios.c_lflag & EXTPROC) |
+ (tty->termios->c_lflag & EXTPROC);
int old_flow = ((old_termios.c_iflag & IXON) &&
(old_termios.c_cc[VSTOP] == '\023') &&
(old_termios.c_cc[VSTART] == '\021'));
int new_flow = (I_IXON(tty) &&
STOP_CHAR(tty) == '\023' &&
START_CHAR(tty) == '\021');
- if (old_flow != new_flow) {
+ if ((old_flow != new_flow) || extproc) {
spin_lock_irqsave(&tty->ctrl_lock, flags);
- tty->ctrl_status &= ~(TIOCPKT_DOSTOP | TIOCPKT_NOSTOP);
- if (new_flow)
- tty->ctrl_status |= TIOCPKT_DOSTOP;
- else
- tty->ctrl_status |= TIOCPKT_NOSTOP;
+ if (old_flow != new_flow) {
+ tty->ctrl_status &= ~(TIOCPKT_DOSTOP | TIOCPKT_NOSTOP);
+ if (new_flow)
+ tty->ctrl_status |= TIOCPKT_DOSTOP;
+ else
+ tty->ctrl_status |= TIOCPKT_NOSTOP;
+ }
+ if (extproc)
+ tty->ctrl_status |= TIOCPKT_IOCTL;
spin_unlock_irqrestore(&tty->ctrl_lock, flags);
wake_up_interruptible(&tty->link->read_wait);
}