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1626 |
jcastillo |
/*
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* linux/drivers/char/tty_ioctl.c
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*
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* Copyright (C) 1991, 1992, 1993, 1994 Linus Torvalds
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*
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* Modified by Fred N. van Kempen, 01/29/93, to add line disciplines
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* which can be dynamically activated and de-activated by the line
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* discipline handling modules (like SLIP).
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*/
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#include <linux/types.h>
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#include <linux/termios.h>
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#include <linux/errno.h>
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#include <linux/sched.h>
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#include <linux/kernel.h>
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#include <linux/major.h>
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#include <linux/tty.h>
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#include <linux/fcntl.h>
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#include <linux/string.h>
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#include <linux/mm.h>
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#include <asm/io.h>
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#include <asm/bitops.h>
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#include <asm/segment.h>
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#include <asm/system.h>
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#undef TTY_DEBUG_WAIT_UNTIL_SENT
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#undef DEBUG
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#ifdef DEBUG
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# define PRINTK(x) printk (x)
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#else
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# define PRINTK(x) /**/
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#endif
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| 36 |
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/*
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* Internal flag options for termios setting behavior
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*/
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#define TERMIOS_FLUSH 1
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#define TERMIOS_WAIT 2
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#define TERMIOS_TERMIO 4
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void tty_wait_until_sent(struct tty_struct * tty, int timeout)
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{
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struct wait_queue wait = { current, NULL };
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#ifdef TTY_DEBUG_WAIT_UNTIL_SENT
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printk("%s wait until sent...\n", tty_name(tty));
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#endif
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if (!tty->driver.chars_in_buffer ||
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!tty->driver.chars_in_buffer(tty))
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return;
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add_wait_queue(&tty->write_wait, &wait);
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current->counter = 0; /* make us low-priority */
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if (timeout)
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current->timeout = timeout + jiffies;
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else
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current->timeout = (unsigned) -1;
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do {
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#ifdef TTY_DEBUG_WAIT_UNTIL_SENT
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printk("waiting %s...(%d)\n", tty_name(tty), tty->driver.chars_in_buffer(tty));
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#endif
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current->state = TASK_INTERRUPTIBLE;
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if (current->signal & ~current->blocked)
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break;
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if (!tty->driver.chars_in_buffer(tty))
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break;
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schedule();
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} while (current->timeout);
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current->state = TASK_RUNNING;
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remove_wait_queue(&tty->write_wait, &wait);
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}
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static void unset_locked_termios(struct termios *termios,
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struct termios *old,
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struct termios *locked)
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{
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int i;
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#define NOSET_MASK(x,y,z) (x = ((x) & ~(z)) | ((y) & (z)))
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if (!locked) {
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printk("Warning?!? termios_locked is NULL.\n");
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return;
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}
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NOSET_MASK(termios->c_iflag, old->c_iflag, locked->c_iflag);
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NOSET_MASK(termios->c_oflag, old->c_oflag, locked->c_oflag);
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NOSET_MASK(termios->c_cflag, old->c_cflag, locked->c_cflag);
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NOSET_MASK(termios->c_lflag, old->c_lflag, locked->c_lflag);
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termios->c_line = locked->c_line ? old->c_line : termios->c_line;
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for (i=0; i < NCCS; i++)
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termios->c_cc[i] = locked->c_cc[i] ?
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old->c_cc[i] : termios->c_cc[i];
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}
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static void change_termios(struct tty_struct * tty, struct termios * new_termios)
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{
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int canon_change;
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struct termios old_termios = *tty->termios;
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cli();
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*tty->termios = *new_termios;
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unset_locked_termios(tty->termios, &old_termios, tty->termios_locked);
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canon_change = (old_termios.c_lflag ^ tty->termios->c_lflag) & ICANON;
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if (canon_change) {
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memset(&tty->read_flags, 0, sizeof tty->read_flags);
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tty->canon_head = tty->read_tail;
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tty->canon_data = 0;
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tty->erasing = 0;
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}
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sti();
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if (canon_change && !L_ICANON(tty) && tty->read_cnt)
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/* Get characters left over from canonical mode. */
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wake_up_interruptible(&tty->read_wait);
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/* see if packet mode change of state */
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if (tty->link && tty->link->packet) {
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int old_flow = ((old_termios.c_iflag & IXON) &&
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(old_termios.c_cc[VSTOP] == '\023') &&
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(old_termios.c_cc[VSTART] == '\021'));
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int new_flow = (I_IXON(tty) &&
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STOP_CHAR(tty) == '\023' &&
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START_CHAR(tty) == '\021');
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if (old_flow != new_flow) {
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tty->ctrl_status &= ~(TIOCPKT_DOSTOP | TIOCPKT_NOSTOP);
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if (new_flow)
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tty->ctrl_status |= TIOCPKT_DOSTOP;
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else
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tty->ctrl_status |= TIOCPKT_NOSTOP;
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wake_up_interruptible(&tty->link->read_wait);
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}
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}
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if (tty->driver.set_termios)
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(*tty->driver.set_termios)(tty, &old_termios);
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| 138 |
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| 139 |
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if (tty->ldisc.set_termios)
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(*tty->ldisc.set_termios)(tty, &old_termios);
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| 141 |
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}
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static int set_termios(struct tty_struct * tty, unsigned long arg, int opt)
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{
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struct termios tmp_termios;
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int retval;
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| 148 |
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retval = tty_check_change(tty);
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if (retval)
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return retval;
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if (opt & TERMIOS_TERMIO) {
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struct termio tmp_termio;
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retval = verify_area(VERIFY_READ, (void *) arg, sizeof(struct termio));
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if (retval)
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return retval;
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tmp_termios = *tty->termios;
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memcpy_fromfs(&tmp_termio, (struct termio *) arg,
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| 159 |
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sizeof (struct termio));
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trans_from_termio(&tmp_termio, &tmp_termios);
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} else {
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retval = verify_area(VERIFY_READ, (void *) arg, sizeof(struct termios));
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if (retval)
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return retval;
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memcpy_fromfs(&tmp_termios, (struct termios *) arg,
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sizeof (struct termios));
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}
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if ((opt & TERMIOS_FLUSH) && tty->ldisc.flush_buffer)
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tty->ldisc.flush_buffer(tty);
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if (opt & TERMIOS_WAIT)
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tty_wait_until_sent(tty, 0);
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change_termios(tty, &tmp_termios);
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return 0;
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}
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static int get_termio(struct tty_struct * tty, struct termio * termio)
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{
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int i;
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struct termio tmp_termio;
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i = verify_area(VERIFY_WRITE, termio, sizeof (struct termio));
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if (i)
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return i;
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trans_to_termio(tty->termios, &tmp_termio);
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memcpy_tofs(termio, &tmp_termio, sizeof (struct termio));
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return 0;
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| 190 |
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}
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| 191 |
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| 192 |
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static unsigned long inq_canon(struct tty_struct * tty)
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| 193 |
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{
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| 194 |
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int nr, head, tail;
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| 195 |
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| 196 |
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if (!tty->canon_data || !tty->read_buf)
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| 197 |
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return 0;
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| 198 |
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head = tty->canon_head;
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| 199 |
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tail = tty->read_tail;
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| 200 |
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nr = (head - tail) & (N_TTY_BUF_SIZE-1);
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| 201 |
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/* Skip EOF-chars.. */
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| 202 |
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while (head != tail) {
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| 203 |
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if (test_bit(tail, &tty->read_flags) &&
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| 204 |
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tty->read_buf[tail] == __DISABLED_CHAR)
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| 205 |
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nr--;
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| 206 |
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tail = (tail+1) & (N_TTY_BUF_SIZE-1);
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| 207 |
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}
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| 208 |
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return nr;
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| 209 |
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}
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| 210 |
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| 211 |
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#ifdef TIOCGETP
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/*
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| 213 |
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* These are deprecated, but there is limited support..
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*
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| 215 |
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* The "sg_flags" translation is a joke..
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*/
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| 217 |
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static int get_sgflags(struct tty_struct * tty)
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| 218 |
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{
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| 219 |
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int flags = 0;
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| 220 |
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| 221 |
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if (!(tty->termios->c_lflag & ICANON))
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| 222 |
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if (tty->termios->c_lflag & ISIG)
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| 223 |
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flags |= 0x02; /* cbreak */
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| 224 |
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else
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| 225 |
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flags |= 0x20; /* raw */
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| 226 |
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if (tty->termios->c_lflag & ECHO)
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| 227 |
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flags |= 0x08; /* echo */
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| 228 |
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if (tty->termios->c_oflag & OPOST)
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| 229 |
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if (tty->termios->c_oflag & ONLCR)
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| 230 |
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flags |= 0x10; /* crmod */
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| 231 |
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return flags;
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| 232 |
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}
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| 233 |
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| 234 |
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static int get_sgttyb(struct tty_struct * tty, struct sgttyb * sgttyb)
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| 235 |
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{
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| 236 |
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int retval;
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| 237 |
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struct sgttyb tmp;
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| 238 |
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| 239 |
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retval = verify_area(VERIFY_WRITE, sgttyb, sizeof(struct sgttyb));
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| 240 |
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if (retval)
|
| 241 |
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return retval;
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| 242 |
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tmp.sg_ispeed = 0;
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| 243 |
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tmp.sg_ospeed = 0;
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| 244 |
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tmp.sg_erase = tty->termios->c_cc[VERASE];
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| 245 |
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tmp.sg_kill = tty->termios->c_cc[VKILL];
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| 246 |
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tmp.sg_flags = get_sgflags(tty);
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| 247 |
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memcpy_tofs(sgttyb, &tmp, sizeof(tmp));
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| 248 |
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return 0;
|
| 249 |
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}
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| 250 |
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| 251 |
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static void set_sgflags(struct termios * termios, int flags)
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| 252 |
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{
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| 253 |
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termios->c_iflag = ICRNL | IXON;
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| 254 |
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termios->c_oflag = 0;
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| 255 |
|
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termios->c_lflag = ISIG | ICANON;
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| 256 |
|
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if (flags & 0x02) { /* cbreak */
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| 257 |
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termios->c_iflag = 0;
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| 258 |
|
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termios->c_lflag &= ~ICANON;
|
| 259 |
|
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}
|
| 260 |
|
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if (flags & 0x08) { /* echo */
|
| 261 |
|
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termios->c_lflag |= ECHO | ECHOE | ECHOK | ECHOCTL | ECHOKE | IEXTEN;
|
| 262 |
|
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}
|
| 263 |
|
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if (flags & 0x10) { /* crmod */
|
| 264 |
|
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termios->c_oflag |= OPOST | ONLCR;
|
| 265 |
|
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}
|
| 266 |
|
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if (flags & 0x20) { /* raw */
|
| 267 |
|
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termios->c_iflag = 0;
|
| 268 |
|
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termios->c_lflag &= ~(ISIG | ICANON);
|
| 269 |
|
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}
|
| 270 |
|
|
if (!(termios->c_lflag & ICANON)) {
|
| 271 |
|
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termios->c_cc[VMIN] = 1;
|
| 272 |
|
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termios->c_cc[VTIME] = 0;
|
| 273 |
|
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}
|
| 274 |
|
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}
|
| 275 |
|
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|
| 276 |
|
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static int set_sgttyb(struct tty_struct * tty, struct sgttyb * sgttyb)
|
| 277 |
|
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{
|
| 278 |
|
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int retval;
|
| 279 |
|
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struct sgttyb tmp;
|
| 280 |
|
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struct termios termios;
|
| 281 |
|
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|
| 282 |
|
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retval = verify_area(VERIFY_READ, sgttyb, sizeof(struct sgttyb));
|
| 283 |
|
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if (retval)
|
| 284 |
|
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return retval;
|
| 285 |
|
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retval = tty_check_change(tty);
|
| 286 |
|
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if (retval)
|
| 287 |
|
|
return retval;
|
| 288 |
|
|
termios = *tty->termios;
|
| 289 |
|
|
memcpy_fromfs(&tmp, sgttyb, sizeof(tmp));
|
| 290 |
|
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termios.c_cc[VERASE] = tmp.sg_erase;
|
| 291 |
|
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termios.c_cc[VKILL] = tmp.sg_kill;
|
| 292 |
|
|
set_sgflags(&termios, tmp.sg_flags);
|
| 293 |
|
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change_termios(tty, &termios);
|
| 294 |
|
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return 0;
|
| 295 |
|
|
}
|
| 296 |
|
|
#endif
|
| 297 |
|
|
|
| 298 |
|
|
#ifdef TIOCGETC
|
| 299 |
|
|
static int get_tchars(struct tty_struct * tty, struct tchars * tchars)
|
| 300 |
|
|
{
|
| 301 |
|
|
int retval;
|
| 302 |
|
|
struct tchars tmp;
|
| 303 |
|
|
|
| 304 |
|
|
retval = verify_area(VERIFY_WRITE, tchars, sizeof(struct tchars));
|
| 305 |
|
|
if (retval)
|
| 306 |
|
|
return retval;
|
| 307 |
|
|
tmp.t_intrc = tty->termios->c_cc[VINTR];
|
| 308 |
|
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tmp.t_quitc = tty->termios->c_cc[VQUIT];
|
| 309 |
|
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tmp.t_startc = tty->termios->c_cc[VSTART];
|
| 310 |
|
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tmp.t_stopc = tty->termios->c_cc[VSTOP];
|
| 311 |
|
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tmp.t_eofc = tty->termios->c_cc[VEOF];
|
| 312 |
|
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tmp.t_brkc = tty->termios->c_cc[VEOL2]; /* what is brkc anyway? */
|
| 313 |
|
|
memcpy_tofs(tchars, &tmp, sizeof(tmp));
|
| 314 |
|
|
return 0;
|
| 315 |
|
|
}
|
| 316 |
|
|
|
| 317 |
|
|
static int set_tchars(struct tty_struct * tty, struct tchars * tchars)
|
| 318 |
|
|
{
|
| 319 |
|
|
int retval;
|
| 320 |
|
|
struct tchars tmp;
|
| 321 |
|
|
|
| 322 |
|
|
retval = verify_area(VERIFY_READ, tchars, sizeof(struct tchars));
|
| 323 |
|
|
if (retval)
|
| 324 |
|
|
return retval;
|
| 325 |
|
|
memcpy_fromfs(&tmp, tchars, sizeof(tmp));
|
| 326 |
|
|
tty->termios->c_cc[VINTR] = tmp.t_intrc;
|
| 327 |
|
|
tty->termios->c_cc[VQUIT] = tmp.t_quitc;
|
| 328 |
|
|
tty->termios->c_cc[VSTART] = tmp.t_startc;
|
| 329 |
|
|
tty->termios->c_cc[VSTOP] = tmp.t_stopc;
|
| 330 |
|
|
tty->termios->c_cc[VEOF] = tmp.t_eofc;
|
| 331 |
|
|
tty->termios->c_cc[VEOL2] = tmp.t_brkc; /* what is brkc anyway? */
|
| 332 |
|
|
return 0;
|
| 333 |
|
|
}
|
| 334 |
|
|
#endif
|
| 335 |
|
|
|
| 336 |
|
|
#ifdef TIOCGLTC
|
| 337 |
|
|
static int get_ltchars(struct tty_struct * tty, struct ltchars * ltchars)
|
| 338 |
|
|
{
|
| 339 |
|
|
int retval;
|
| 340 |
|
|
struct ltchars tmp;
|
| 341 |
|
|
|
| 342 |
|
|
retval = verify_area(VERIFY_WRITE, ltchars, sizeof(struct ltchars));
|
| 343 |
|
|
if (retval)
|
| 344 |
|
|
return retval;
|
| 345 |
|
|
tmp.t_suspc = tty->termios->c_cc[VSUSP];
|
| 346 |
|
|
tmp.t_dsuspc = tty->termios->c_cc[VSUSP]; /* what is dsuspc anyway? */
|
| 347 |
|
|
tmp.t_rprntc = tty->termios->c_cc[VREPRINT];
|
| 348 |
|
|
tmp.t_flushc = tty->termios->c_cc[VEOL2]; /* what is flushc anyway? */
|
| 349 |
|
|
tmp.t_werasc = tty->termios->c_cc[VWERASE];
|
| 350 |
|
|
tmp.t_lnextc = tty->termios->c_cc[VLNEXT];
|
| 351 |
|
|
memcpy_tofs(ltchars, &tmp, sizeof(tmp));
|
| 352 |
|
|
return 0;
|
| 353 |
|
|
}
|
| 354 |
|
|
|
| 355 |
|
|
static int set_ltchars(struct tty_struct * tty, struct ltchars * ltchars)
|
| 356 |
|
|
{
|
| 357 |
|
|
int retval;
|
| 358 |
|
|
struct ltchars tmp;
|
| 359 |
|
|
|
| 360 |
|
|
retval = verify_area(VERIFY_READ, ltchars, sizeof(struct ltchars));
|
| 361 |
|
|
if (retval)
|
| 362 |
|
|
return retval;
|
| 363 |
|
|
memcpy_fromfs(&tmp, ltchars, sizeof(tmp));
|
| 364 |
|
|
tty->termios->c_cc[VSUSP] = tmp.t_suspc;
|
| 365 |
|
|
tty->termios->c_cc[VEOL2] = tmp.t_dsuspc; /* what is dsuspc anyway? */
|
| 366 |
|
|
tty->termios->c_cc[VREPRINT] = tmp.t_rprntc;
|
| 367 |
|
|
tty->termios->c_cc[VEOL2] = tmp.t_flushc; /* what is flushc anyway? */
|
| 368 |
|
|
tty->termios->c_cc[VWERASE] = tmp.t_werasc;
|
| 369 |
|
|
tty->termios->c_cc[VLNEXT] = tmp.t_lnextc;
|
| 370 |
|
|
return 0;
|
| 371 |
|
|
}
|
| 372 |
|
|
#endif
|
| 373 |
|
|
|
| 374 |
|
|
int n_tty_ioctl(struct tty_struct * tty, struct file * file,
|
| 375 |
|
|
unsigned int cmd, unsigned long arg)
|
| 376 |
|
|
{
|
| 377 |
|
|
struct tty_struct * real_tty;
|
| 378 |
|
|
int retval;
|
| 379 |
|
|
|
| 380 |
|
|
if (tty->driver.type == TTY_DRIVER_TYPE_PTY &&
|
| 381 |
|
|
tty->driver.subtype == PTY_TYPE_MASTER)
|
| 382 |
|
|
real_tty = tty->link;
|
| 383 |
|
|
else
|
| 384 |
|
|
real_tty = tty;
|
| 385 |
|
|
|
| 386 |
|
|
switch (cmd) {
|
| 387 |
|
|
#ifdef TIOCGETP
|
| 388 |
|
|
case TIOCGETP:
|
| 389 |
|
|
return get_sgttyb(real_tty, (struct sgttyb *) arg);
|
| 390 |
|
|
case TIOCSETP:
|
| 391 |
|
|
case TIOCSETN:
|
| 392 |
|
|
return set_sgttyb(real_tty, (struct sgttyb *) arg);
|
| 393 |
|
|
#endif
|
| 394 |
|
|
#ifdef TIOCGETC
|
| 395 |
|
|
case TIOCGETC:
|
| 396 |
|
|
return get_tchars(real_tty, (struct tchars *) arg);
|
| 397 |
|
|
case TIOCSETC:
|
| 398 |
|
|
return set_tchars(real_tty, (struct tchars *) arg);
|
| 399 |
|
|
#endif
|
| 400 |
|
|
#ifdef TIOCGLTC
|
| 401 |
|
|
case TIOCGLTC:
|
| 402 |
|
|
return get_ltchars(real_tty, (struct ltchars *) arg);
|
| 403 |
|
|
case TIOCSLTC:
|
| 404 |
|
|
return set_ltchars(real_tty, (struct ltchars *) arg);
|
| 405 |
|
|
#endif
|
| 406 |
|
|
case TCGETS:
|
| 407 |
|
|
retval = verify_area(VERIFY_WRITE, (void *) arg,
|
| 408 |
|
|
sizeof (struct termios));
|
| 409 |
|
|
if (retval)
|
| 410 |
|
|
return retval;
|
| 411 |
|
|
memcpy_tofs((struct termios *) arg,
|
| 412 |
|
|
real_tty->termios,
|
| 413 |
|
|
sizeof (struct termios));
|
| 414 |
|
|
return 0;
|
| 415 |
|
|
case TCSETSF:
|
| 416 |
|
|
return set_termios(real_tty, arg, TERMIOS_FLUSH);
|
| 417 |
|
|
case TCSETSW:
|
| 418 |
|
|
return set_termios(real_tty, arg, TERMIOS_WAIT);
|
| 419 |
|
|
case TCSETS:
|
| 420 |
|
|
return set_termios(real_tty, arg, 0);
|
| 421 |
|
|
case TCGETA:
|
| 422 |
|
|
return get_termio(real_tty,(struct termio *) arg);
|
| 423 |
|
|
case TCSETAF:
|
| 424 |
|
|
return set_termios(real_tty, arg, TERMIOS_FLUSH | TERMIOS_TERMIO);
|
| 425 |
|
|
case TCSETAW:
|
| 426 |
|
|
return set_termios(real_tty, arg, TERMIOS_WAIT | TERMIOS_TERMIO);
|
| 427 |
|
|
case TCSETA:
|
| 428 |
|
|
return set_termios(real_tty, arg, TERMIOS_TERMIO);
|
| 429 |
|
|
case TCXONC:
|
| 430 |
|
|
retval = tty_check_change(tty);
|
| 431 |
|
|
if (retval)
|
| 432 |
|
|
return retval;
|
| 433 |
|
|
switch (arg) {
|
| 434 |
|
|
case TCOOFF:
|
| 435 |
|
|
stop_tty(tty);
|
| 436 |
|
|
break;
|
| 437 |
|
|
case TCOON:
|
| 438 |
|
|
start_tty(tty);
|
| 439 |
|
|
break;
|
| 440 |
|
|
case TCIOFF:
|
| 441 |
|
|
if (STOP_CHAR(tty) != __DISABLED_CHAR)
|
| 442 |
|
|
tty->driver.write(tty, 0,
|
| 443 |
|
|
&STOP_CHAR(tty), 1);
|
| 444 |
|
|
break;
|
| 445 |
|
|
case TCION:
|
| 446 |
|
|
if (START_CHAR(tty) != __DISABLED_CHAR)
|
| 447 |
|
|
tty->driver.write(tty, 0,
|
| 448 |
|
|
&START_CHAR(tty), 1);
|
| 449 |
|
|
break;
|
| 450 |
|
|
default:
|
| 451 |
|
|
return -EINVAL;
|
| 452 |
|
|
}
|
| 453 |
|
|
return 0;
|
| 454 |
|
|
case TCFLSH:
|
| 455 |
|
|
retval = tty_check_change(tty);
|
| 456 |
|
|
if (retval)
|
| 457 |
|
|
return retval;
|
| 458 |
|
|
switch (arg) {
|
| 459 |
|
|
case TCIFLUSH:
|
| 460 |
|
|
if (tty->ldisc.flush_buffer)
|
| 461 |
|
|
tty->ldisc.flush_buffer(tty);
|
| 462 |
|
|
break;
|
| 463 |
|
|
case TCIOFLUSH:
|
| 464 |
|
|
if (tty->ldisc.flush_buffer)
|
| 465 |
|
|
tty->ldisc.flush_buffer(tty);
|
| 466 |
|
|
/* fall through */
|
| 467 |
|
|
case TCOFLUSH:
|
| 468 |
|
|
if (tty->driver.flush_buffer)
|
| 469 |
|
|
tty->driver.flush_buffer(tty);
|
| 470 |
|
|
break;
|
| 471 |
|
|
default:
|
| 472 |
|
|
return -EINVAL;
|
| 473 |
|
|
}
|
| 474 |
|
|
return 0;
|
| 475 |
|
|
case TIOCOUTQ:
|
| 476 |
|
|
retval = verify_area(VERIFY_WRITE, (void *) arg,
|
| 477 |
|
|
sizeof (int));
|
| 478 |
|
|
if (retval)
|
| 479 |
|
|
return retval;
|
| 480 |
|
|
if (tty->driver.chars_in_buffer)
|
| 481 |
|
|
put_user(tty->driver.chars_in_buffer(tty),
|
| 482 |
|
|
(int *) arg);
|
| 483 |
|
|
else
|
| 484 |
|
|
put_user(0, (int *) arg);
|
| 485 |
|
|
return 0;
|
| 486 |
|
|
case TIOCINQ:
|
| 487 |
|
|
retval = verify_area(VERIFY_WRITE, (void *) arg,
|
| 488 |
|
|
sizeof (unsigned long));
|
| 489 |
|
|
if (retval)
|
| 490 |
|
|
return retval;
|
| 491 |
|
|
if (L_ICANON(tty))
|
| 492 |
|
|
put_fs_long(inq_canon(tty),
|
| 493 |
|
|
(unsigned long *) arg);
|
| 494 |
|
|
else
|
| 495 |
|
|
put_fs_long(tty->read_cnt,
|
| 496 |
|
|
(unsigned long *) arg);
|
| 497 |
|
|
return 0;
|
| 498 |
|
|
case TIOCGLCKTRMIOS:
|
| 499 |
|
|
retval = verify_area(VERIFY_WRITE, (void *) arg,
|
| 500 |
|
|
sizeof (struct termios));
|
| 501 |
|
|
if (retval)
|
| 502 |
|
|
return retval;
|
| 503 |
|
|
memcpy_tofs((struct termios *) arg,
|
| 504 |
|
|
real_tty->termios_locked,
|
| 505 |
|
|
sizeof (struct termios));
|
| 506 |
|
|
return 0;
|
| 507 |
|
|
case TIOCSLCKTRMIOS:
|
| 508 |
|
|
if (!suser())
|
| 509 |
|
|
return -EPERM;
|
| 510 |
|
|
retval = verify_area(VERIFY_READ, (void *) arg,
|
| 511 |
|
|
sizeof (struct termios));
|
| 512 |
|
|
if (retval)
|
| 513 |
|
|
return retval;
|
| 514 |
|
|
memcpy_fromfs(real_tty->termios_locked,
|
| 515 |
|
|
(struct termios *) arg,
|
| 516 |
|
|
sizeof (struct termios));
|
| 517 |
|
|
return 0;
|
| 518 |
|
|
case TIOCPKT:
|
| 519 |
|
|
if (tty->driver.type != TTY_DRIVER_TYPE_PTY ||
|
| 520 |
|
|
tty->driver.subtype != PTY_TYPE_MASTER)
|
| 521 |
|
|
return -ENOTTY;
|
| 522 |
|
|
retval = verify_area(VERIFY_READ, (void *) arg,
|
| 523 |
|
|
sizeof (int));
|
| 524 |
|
|
if (retval)
|
| 525 |
|
|
return retval;
|
| 526 |
|
|
if (get_user((int*)arg)) {
|
| 527 |
|
|
if (!tty->packet) {
|
| 528 |
|
|
tty->packet = 1;
|
| 529 |
|
|
tty->link->ctrl_status = 0;
|
| 530 |
|
|
}
|
| 531 |
|
|
} else
|
| 532 |
|
|
tty->packet = 0;
|
| 533 |
|
|
return 0;
|
| 534 |
|
|
/* These two ioctl's always return success; even if */
|
| 535 |
|
|
/* the driver doesn't support them. */
|
| 536 |
|
|
case TCSBRK: case TCSBRKP:
|
| 537 |
|
|
retval = tty_check_change(tty);
|
| 538 |
|
|
if (retval)
|
| 539 |
|
|
return retval;
|
| 540 |
|
|
tty_wait_until_sent(tty, 0);
|
| 541 |
|
|
if (!tty->driver.ioctl)
|
| 542 |
|
|
return 0;
|
| 543 |
|
|
tty->driver.ioctl(tty, file, cmd, arg);
|
| 544 |
|
|
return 0;
|
| 545 |
|
|
default:
|
| 546 |
|
|
return -ENOIOCTLCMD;
|
| 547 |
|
|
}
|
| 548 |
|
|
}
|
