diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/char/tty_io.c | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/drivers/char/tty_io.c b/drivers/char/tty_io.c index 4c0e4ed31a4..913b50258f9 100644 --- a/drivers/char/tty_io.c +++ b/drivers/char/tty_io.c @@ -1081,6 +1081,31 @@ out: return ret; } +/** + * tty_write_message - write a message to a certain tty, not just the console. + * @tty: the destination tty_struct + * @msg: the message to write + * + * This is used for messages that need to be redirected to a specific tty. + * We don't put it into the syslog queue right now maybe in the future if + * really needed. + * + * We must still hold the BKL and test the CLOSING flag for the moment. + */ + +void tty_write_message(struct tty_struct *tty, char *msg) +{ + lock_kernel(); + if (tty) { + mutex_lock(&tty->atomic_write_lock); + if (tty->ops->write && !test_bit(TTY_CLOSING, &tty->flags)) + tty->ops->write(tty, msg, strlen(msg)); + tty_write_unlock(tty); + } + unlock_kernel(); + return; +} + /** * tty_write - write method for tty device file |