if (!timeout)
timeout = MAX_SCHEDULE_TIMEOUT;
if (wait_event_interruptible_timeout(tty->write_wait,
- !tty->driver->chars_in_buffer(tty), timeout))
+ !tty->driver->chars_in_buffer(tty), timeout) < 0)
return;
if (tty->driver->wait_until_sent)
tty->driver->wait_until_sent(tty, timeout);
EXPORT_SYMBOL(tty_termios_copy_hw);
+/**
+ * tty_termios_hw_change - check for setting change
+ * @a: termios
+ * @b: termios to compare
+ *
+ * Check if any of the bits that affect a dumb device have changed
+ * between the two termios structures, or a speed change is needed.
+ */
+
+int tty_termios_hw_change(struct ktermios *a, struct ktermios *b)
+{
+ if (a->c_ispeed != b->c_ispeed || a->c_ospeed != b->c_ospeed)
+ return 1;
+ if ((a->c_cflag ^ b->c_cflag) & ~(HUPCL | CREAD | CLOCAL))
+ return 1;
+ return 0;
+}
+EXPORT_SYMBOL(tty_termios_hw_change);
+
/**
* change_termios - update termios values
* @tty: tty to update
* @arg: user data
* @opt: option information
*
- * Helper function to prepare termios data and run neccessary other
+ * Helper function to prepare termios data and run necessary other
* functions before using change_termios to do the actual changes.
*
* Locking:
return 0;
}
-int n_tty_ioctl(struct tty_struct * tty, struct file * file,
- unsigned int cmd, unsigned long arg)
+/**
+ * tty_mode_ioctl - mode related ioctls
+ * @tty: tty for the ioctl
+ * @file: file pointer for the tty
+ * @cmd: command
+ * @arg: ioctl argument
+ *
+ * Perform non line discipline specific mode control ioctls. This
+ * is designed to be called by line disciplines to ensure they provide
+ * consistent mode setting.
+ */
+
+int tty_mode_ioctl(struct tty_struct * tty, struct file *file,
+ unsigned int cmd, unsigned long arg)
{
struct tty_struct * real_tty;
void __user *p = (void __user *)arg;
- int retval;
- struct tty_ldisc *ld;
if (tty->driver->type == TTY_DRIVER_TYPE_PTY &&
tty->driver->subtype == PTY_TYPE_MASTER)
return set_termios(real_tty, p, TERMIOS_WAIT | TERMIOS_TERMIO);
case TCSETA:
return set_termios(real_tty, p, TERMIOS_TERMIO);
+#ifndef TCGETS2
+ case TIOCGLCKTRMIOS:
+ if (kernel_termios_to_user_termios((struct termios __user *)arg, real_tty->termios_locked))
+ return -EFAULT;
+ return 0;
+
+ case TIOCSLCKTRMIOS:
+ if (!capable(CAP_SYS_ADMIN))
+ return -EPERM;
+ if (user_termios_to_kernel_termios(real_tty->termios_locked, (struct termios __user *) arg))
+ return -EFAULT;
+ return 0;
+#else
+ case TIOCGLCKTRMIOS:
+ if (kernel_termios_to_user_termios_1((struct termios __user *)arg, real_tty->termios_locked))
+ return -EFAULT;
+ return 0;
+
+ case TIOCSLCKTRMIOS:
+ if (!capable(CAP_SYS_ADMIN))
+ return -EPERM;
+ if (user_termios_to_kernel_termios_1(real_tty->termios_locked, (struct termios __user *) arg))
+ return -EFAULT;
+ return 0;
+#endif
+ case TIOCGSOFTCAR:
+ return put_user(C_CLOCAL(tty) ? 1 : 0, (int __user *)arg);
+ case TIOCSSOFTCAR:
+ if (get_user(arg, (unsigned int __user *) arg))
+ return -EFAULT;
+ mutex_lock(&tty->termios_mutex);
+ tty->termios->c_cflag =
+ ((tty->termios->c_cflag & ~CLOCAL) |
+ (arg ? CLOCAL : 0));
+ mutex_unlock(&tty->termios_mutex);
+ return 0;
+ default:
+ return -ENOIOCTLCMD;
+ }
+}
+
+EXPORT_SYMBOL_GPL(tty_mode_ioctl);
+
+int tty_perform_flush(struct tty_struct *tty, unsigned long arg)
+{
+ struct tty_ldisc *ld;
+ int retval = tty_check_change(tty);
+ if (retval)
+ return retval;
+
+ ld = tty_ldisc_ref(tty);
+ switch (arg) {
+ case TCIFLUSH:
+ if (ld && ld->flush_buffer)
+ ld->flush_buffer(tty);
+ break;
+ case TCIOFLUSH:
+ if (ld && ld->flush_buffer)
+ ld->flush_buffer(tty);
+ /* fall through */
+ case TCOFLUSH:
+ if (tty->driver->flush_buffer)
+ tty->driver->flush_buffer(tty);
+ break;
+ default:
+ tty_ldisc_deref(ld);
+ return -EINVAL;
+ }
+ tty_ldisc_deref(ld);
+ return 0;
+}
+
+EXPORT_SYMBOL_GPL(tty_perform_flush);
+
+int n_tty_ioctl(struct tty_struct * tty, struct file * file,
+ unsigned int cmd, unsigned long arg)
+{
+ struct tty_struct * real_tty;
+ int retval;
+
+ if (tty->driver->type == TTY_DRIVER_TYPE_PTY &&
+ tty->driver->subtype == PTY_TYPE_MASTER)
+ real_tty = tty->link;
+ else
+ real_tty = tty;
+
+ switch (cmd) {
case TCXONC:
retval = tty_check_change(tty);
if (retval)
}
return 0;
case TCFLSH:
- retval = tty_check_change(tty);
- if (retval)
- return retval;
-
- ld = tty_ldisc_ref(tty);
- switch (arg) {
- case TCIFLUSH:
- if (ld && ld->flush_buffer)
- ld->flush_buffer(tty);
- break;
- case TCIOFLUSH:
- if (ld && ld->flush_buffer)
- ld->flush_buffer(tty);
- /* fall through */
- case TCOFLUSH:
- if (tty->driver->flush_buffer)
- tty->driver->flush_buffer(tty);
- break;
- default:
- tty_ldisc_deref(ld);
- return -EINVAL;
- }
- tty_ldisc_deref(ld);
- return 0;
+ return tty_perform_flush(tty, arg);
case TIOCOUTQ:
return put_user(tty->driver->chars_in_buffer ?
tty->driver->chars_in_buffer(tty) : 0,
if (L_ICANON(tty))
retval = inq_canon(tty);
return put_user(retval, (unsigned int __user *) arg);
-#ifndef TCGETS2
- case TIOCGLCKTRMIOS:
- if (kernel_termios_to_user_termios((struct termios __user *)arg, real_tty->termios_locked))
- return -EFAULT;
- return 0;
-
- case TIOCSLCKTRMIOS:
- if (!capable(CAP_SYS_ADMIN))
- return -EPERM;
- if (user_termios_to_kernel_termios(real_tty->termios_locked, (struct termios __user *) arg))
- return -EFAULT;
- return 0;
-#else
- case TIOCGLCKTRMIOS:
- if (kernel_termios_to_user_termios_1((struct termios __user *)arg, real_tty->termios_locked))
- return -EFAULT;
- return 0;
-
- case TIOCSLCKTRMIOS:
- if (!capable(CAP_SYS_ADMIN))
- return -EPERM;
- if (user_termios_to_kernel_termios_1(real_tty->termios_locked, (struct termios __user *) arg))
- return -EFAULT;
- return 0;
-#endif
-
case TIOCPKT:
{
int pktmode;
tty->packet = 0;
return 0;
}
- case TIOCGSOFTCAR:
- return put_user(C_CLOCAL(tty) ? 1 : 0, (int __user *)arg);
- case TIOCSSOFTCAR:
- if (get_user(arg, (unsigned int __user *) arg))
- return -EFAULT;
- mutex_lock(&tty->termios_mutex);
- tty->termios->c_cflag =
- ((tty->termios->c_cflag & ~CLOCAL) |
- (arg ? CLOCAL : 0));
- mutex_unlock(&tty->termios_mutex);
- return 0;
default:
- return -ENOIOCTLCMD;
+ /* Try the mode commands */
+ return tty_mode_ioctl(tty, file, cmd, arg);
}
}
git.openpandora.org / pandora-kernel.git / blobdiff