Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
diff --git a/drivers/char/tty_ioctl.c b/drivers/char/tty_ioctl.c
new file mode 100644
index 0000000..5859799
--- /dev/null
+++ b/drivers/char/tty_ioctl.c
@@ -0,0 +1,551 @@
+/*
+ * linux/drivers/char/tty_ioctl.c
+ *
+ * Copyright (C) 1991, 1992, 1993, 1994 Linus Torvalds
+ *
+ * Modified by Fred N. van Kempen, 01/29/93, to add line disciplines
+ * which can be dynamically activated and de-activated by the line
+ * discipline handling modules (like SLIP).
+ */
+
+#include <linux/types.h>
+#include <linux/termios.h>
+#include <linux/errno.h>
+#include <linux/sched.h>
+#include <linux/kernel.h>
+#include <linux/major.h>
+#include <linux/tty.h>
+#include <linux/fcntl.h>
+#include <linux/string.h>
+#include <linux/mm.h>
+#include <linux/module.h>
+#include <linux/bitops.h>
+
+#include <asm/io.h>
+#include <asm/uaccess.h>
+#include <asm/system.h>
+
+#undef TTY_DEBUG_WAIT_UNTIL_SENT
+
+#undef DEBUG
+
+/*
+ * Internal flag options for termios setting behavior
+ */
+#define TERMIOS_FLUSH 1
+#define TERMIOS_WAIT 2
+#define TERMIOS_TERMIO 4
+
+void tty_wait_until_sent(struct tty_struct * tty, long timeout)
+{
+ DECLARE_WAITQUEUE(wait, current);
+
+#ifdef TTY_DEBUG_WAIT_UNTIL_SENT
+ char buf[64];
+
+ printk(KERN_DEBUG "%s wait until sent...\n", tty_name(tty, buf));
+#endif
+ if (!tty->driver->chars_in_buffer)
+ return;
+ add_wait_queue(&tty->write_wait, &wait);
+ if (!timeout)
+ timeout = MAX_SCHEDULE_TIMEOUT;
+ do {
+#ifdef TTY_DEBUG_WAIT_UNTIL_SENT
+ printk(KERN_DEBUG "waiting %s...(%d)\n", tty_name(tty, buf),
+ tty->driver->chars_in_buffer(tty));
+#endif
+ set_current_state(TASK_INTERRUPTIBLE);
+ if (signal_pending(current))
+ goto stop_waiting;
+ if (!tty->driver->chars_in_buffer(tty))
+ break;
+ timeout = schedule_timeout(timeout);
+ } while (timeout);
+ if (tty->driver->wait_until_sent)
+ tty->driver->wait_until_sent(tty, timeout);
+stop_waiting:
+ set_current_state(TASK_RUNNING);
+ remove_wait_queue(&tty->write_wait, &wait);
+}
+
+EXPORT_SYMBOL(tty_wait_until_sent);
+
+static void unset_locked_termios(struct termios *termios,
+ struct termios *old,
+ struct termios *locked)
+{
+ int i;
+
+#define NOSET_MASK(x,y,z) (x = ((x) & ~(z)) | ((y) & (z)))
+
+ if (!locked) {
+ printk(KERN_WARNING "Warning?!? termios_locked is NULL.\n");
+ return;
+ }
+
+ NOSET_MASK(termios->c_iflag, old->c_iflag, locked->c_iflag);
+ NOSET_MASK(termios->c_oflag, old->c_oflag, locked->c_oflag);
+ NOSET_MASK(termios->c_cflag, old->c_cflag, locked->c_cflag);
+ NOSET_MASK(termios->c_lflag, old->c_lflag, locked->c_lflag);
+ termios->c_line = locked->c_line ? old->c_line : termios->c_line;
+ for (i=0; i < NCCS; i++)
+ termios->c_cc[i] = locked->c_cc[i] ?
+ old->c_cc[i] : termios->c_cc[i];
+}
+
+static void change_termios(struct tty_struct * tty, struct termios * new_termios)
+{
+ int canon_change;
+ struct termios old_termios = *tty->termios;
+ struct tty_ldisc *ld;
+
+ /*
+ * Perform the actual termios internal changes under lock.
+ */
+
+
+ /* FIXME: we need to decide on some locking/ordering semantics
+ for the set_termios notification eventually */
+ down(&tty->termios_sem);
+
+ *tty->termios = *new_termios;
+ unset_locked_termios(tty->termios, &old_termios, tty->termios_locked);
+ canon_change = (old_termios.c_lflag ^ tty->termios->c_lflag) & ICANON;
+ if (canon_change) {
+ memset(&tty->read_flags, 0, sizeof tty->read_flags);
+ tty->canon_head = tty->read_tail;
+ tty->canon_data = 0;
+ tty->erasing = 0;
+ }
+
+
+ if (canon_change && !L_ICANON(tty) && tty->read_cnt)
+ /* Get characters left over from canonical mode. */
+ wake_up_interruptible(&tty->read_wait);
+
+ /* See if packet mode change of state. */
+
+ if (tty->link && tty->link->packet) {
+ 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) {
+ tty->ctrl_status &= ~(TIOCPKT_DOSTOP | TIOCPKT_NOSTOP);
+ if (new_flow)
+ tty->ctrl_status |= TIOCPKT_DOSTOP;
+ else
+ tty->ctrl_status |= TIOCPKT_NOSTOP;
+ wake_up_interruptible(&tty->link->read_wait);
+ }
+ }
+
+ if (tty->driver->set_termios)
+ (*tty->driver->set_termios)(tty, &old_termios);
+
+ ld = tty_ldisc_ref(tty);
+ if (ld != NULL) {
+ if (ld->set_termios)
+ (ld->set_termios)(tty, &old_termios);
+ tty_ldisc_deref(ld);
+ }
+ up(&tty->termios_sem);
+}
+
+static int set_termios(struct tty_struct * tty, void __user *arg, int opt)
+{
+ struct termios tmp_termios;
+ struct tty_ldisc *ld;
+ int retval = tty_check_change(tty);
+
+ if (retval)
+ return retval;
+
+ if (opt & TERMIOS_TERMIO) {
+ memcpy(&tmp_termios, tty->termios, sizeof(struct termios));
+ if (user_termio_to_kernel_termios(&tmp_termios,
+ (struct termio __user *)arg))
+ return -EFAULT;
+ } else {
+ if (user_termios_to_kernel_termios(&tmp_termios,
+ (struct termios __user *)arg))
+ return -EFAULT;
+ }
+
+ ld = tty_ldisc_ref(tty);
+
+ if (ld != NULL) {
+ if ((opt & TERMIOS_FLUSH) && ld->flush_buffer)
+ ld->flush_buffer(tty);
+ tty_ldisc_deref(ld);
+ }
+
+ if (opt & TERMIOS_WAIT) {
+ tty_wait_until_sent(tty, 0);
+ if (signal_pending(current))
+ return -EINTR;
+ }
+
+ change_termios(tty, &tmp_termios);
+ return 0;
+}
+
+static int get_termio(struct tty_struct * tty, struct termio __user * termio)
+{
+ if (kernel_termios_to_user_termio(termio, tty->termios))
+ return -EFAULT;
+ return 0;
+}
+
+static unsigned long inq_canon(struct tty_struct * tty)
+{
+ int nr, head, tail;
+
+ if (!tty->canon_data || !tty->read_buf)
+ return 0;
+ head = tty->canon_head;
+ tail = tty->read_tail;
+ nr = (head - tail) & (N_TTY_BUF_SIZE-1);
+ /* Skip EOF-chars.. */
+ while (head != tail) {
+ if (test_bit(tail, tty->read_flags) &&
+ tty->read_buf[tail] == __DISABLED_CHAR)
+ nr--;
+ tail = (tail+1) & (N_TTY_BUF_SIZE-1);
+ }
+ return nr;
+}
+
+#ifdef TIOCGETP
+/*
+ * These are deprecated, but there is limited support..
+ *
+ * The "sg_flags" translation is a joke..
+ */
+static int get_sgflags(struct tty_struct * tty)
+{
+ int flags = 0;
+
+ if (!(tty->termios->c_lflag & ICANON)) {
+ if (tty->termios->c_lflag & ISIG)
+ flags |= 0x02; /* cbreak */
+ else
+ flags |= 0x20; /* raw */
+ }
+ if (tty->termios->c_lflag & ECHO)
+ flags |= 0x08; /* echo */
+ if (tty->termios->c_oflag & OPOST)
+ if (tty->termios->c_oflag & ONLCR)
+ flags |= 0x10; /* crmod */
+ return flags;
+}
+
+static int get_sgttyb(struct tty_struct * tty, struct sgttyb __user * sgttyb)
+{
+ struct sgttyb tmp;
+
+ down(&tty->termios_sem);
+ tmp.sg_ispeed = 0;
+ tmp.sg_ospeed = 0;
+ tmp.sg_erase = tty->termios->c_cc[VERASE];
+ tmp.sg_kill = tty->termios->c_cc[VKILL];
+ tmp.sg_flags = get_sgflags(tty);
+ up(&tty->termios_sem);
+
+ return copy_to_user(sgttyb, &tmp, sizeof(tmp)) ? -EFAULT : 0;
+}
+
+static void set_sgflags(struct termios * termios, int flags)
+{
+ termios->c_iflag = ICRNL | IXON;
+ termios->c_oflag = 0;
+ termios->c_lflag = ISIG | ICANON;
+ if (flags & 0x02) { /* cbreak */
+ termios->c_iflag = 0;
+ termios->c_lflag &= ~ICANON;
+ }
+ if (flags & 0x08) { /* echo */
+ termios->c_lflag |= ECHO | ECHOE | ECHOK |
+ ECHOCTL | ECHOKE | IEXTEN;
+ }
+ if (flags & 0x10) { /* crmod */
+ termios->c_oflag |= OPOST | ONLCR;
+ }
+ if (flags & 0x20) { /* raw */
+ termios->c_iflag = 0;
+ termios->c_lflag &= ~(ISIG | ICANON);
+ }
+ if (!(termios->c_lflag & ICANON)) {
+ termios->c_cc[VMIN] = 1;
+ termios->c_cc[VTIME] = 0;
+ }
+}
+
+static int set_sgttyb(struct tty_struct * tty, struct sgttyb __user * sgttyb)
+{
+ int retval;
+ struct sgttyb tmp;
+ struct termios termios;
+
+ retval = tty_check_change(tty);
+ if (retval)
+ return retval;
+
+ if (copy_from_user(&tmp, sgttyb, sizeof(tmp)))
+ return -EFAULT;
+
+ down(&tty->termios_sem);
+ termios = *tty->termios;
+ termios.c_cc[VERASE] = tmp.sg_erase;
+ termios.c_cc[VKILL] = tmp.sg_kill;
+ set_sgflags(&termios, tmp.sg_flags);
+ up(&tty->termios_sem);
+ change_termios(tty, &termios);
+ return 0;
+}
+#endif
+
+#ifdef TIOCGETC
+static int get_tchars(struct tty_struct * tty, struct tchars __user * tchars)
+{
+ struct tchars tmp;
+
+ tmp.t_intrc = tty->termios->c_cc[VINTR];
+ tmp.t_quitc = tty->termios->c_cc[VQUIT];
+ tmp.t_startc = tty->termios->c_cc[VSTART];
+ tmp.t_stopc = tty->termios->c_cc[VSTOP];
+ tmp.t_eofc = tty->termios->c_cc[VEOF];
+ tmp.t_brkc = tty->termios->c_cc[VEOL2]; /* what is brkc anyway? */
+ return copy_to_user(tchars, &tmp, sizeof(tmp)) ? -EFAULT : 0;
+}
+
+static int set_tchars(struct tty_struct * tty, struct tchars __user * tchars)
+{
+ struct tchars tmp;
+
+ if (copy_from_user(&tmp, tchars, sizeof(tmp)))
+ return -EFAULT;
+ tty->termios->c_cc[VINTR] = tmp.t_intrc;
+ tty->termios->c_cc[VQUIT] = tmp.t_quitc;
+ tty->termios->c_cc[VSTART] = tmp.t_startc;
+ tty->termios->c_cc[VSTOP] = tmp.t_stopc;
+ tty->termios->c_cc[VEOF] = tmp.t_eofc;
+ tty->termios->c_cc[VEOL2] = tmp.t_brkc; /* what is brkc anyway? */
+ return 0;
+}
+#endif
+
+#ifdef TIOCGLTC
+static int get_ltchars(struct tty_struct * tty, struct ltchars __user * ltchars)
+{
+ struct ltchars tmp;
+
+ tmp.t_suspc = tty->termios->c_cc[VSUSP];
+ tmp.t_dsuspc = tty->termios->c_cc[VSUSP]; /* what is dsuspc anyway? */
+ tmp.t_rprntc = tty->termios->c_cc[VREPRINT];
+ tmp.t_flushc = tty->termios->c_cc[VEOL2]; /* what is flushc anyway? */
+ tmp.t_werasc = tty->termios->c_cc[VWERASE];
+ tmp.t_lnextc = tty->termios->c_cc[VLNEXT];
+ return copy_to_user(ltchars, &tmp, sizeof(tmp)) ? -EFAULT : 0;
+}
+
+static int set_ltchars(struct tty_struct * tty, struct ltchars __user * ltchars)
+{
+ struct ltchars tmp;
+
+ if (copy_from_user(&tmp, ltchars, sizeof(tmp)))
+ return -EFAULT;
+
+ tty->termios->c_cc[VSUSP] = tmp.t_suspc;
+ tty->termios->c_cc[VEOL2] = tmp.t_dsuspc; /* what is dsuspc anyway? */
+ tty->termios->c_cc[VREPRINT] = tmp.t_rprntc;
+ tty->termios->c_cc[VEOL2] = tmp.t_flushc; /* what is flushc anyway? */
+ tty->termios->c_cc[VWERASE] = tmp.t_werasc;
+ tty->termios->c_cc[VLNEXT] = tmp.t_lnextc;
+ return 0;
+}
+#endif
+
+/*
+ * Send a high priority character to the tty.
+ */
+static void send_prio_char(struct tty_struct *tty, char ch)
+{
+ int was_stopped = tty->stopped;
+
+ if (tty->driver->send_xchar) {
+ tty->driver->send_xchar(tty, ch);
+ return;
+ }
+ if (was_stopped)
+ start_tty(tty);
+ tty->driver->write(tty, &ch, 1);
+ if (was_stopped)
+ stop_tty(tty);
+}
+
+int n_tty_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)
+ real_tty = tty->link;
+ else
+ real_tty = tty;
+
+ switch (cmd) {
+#ifdef TIOCGETP
+ case TIOCGETP:
+ return get_sgttyb(real_tty, (struct sgttyb __user *) arg);
+ case TIOCSETP:
+ case TIOCSETN:
+ return set_sgttyb(real_tty, (struct sgttyb __user *) arg);
+#endif
+#ifdef TIOCGETC
+ case TIOCGETC:
+ return get_tchars(real_tty, p);
+ case TIOCSETC:
+ return set_tchars(real_tty, p);
+#endif
+#ifdef TIOCGLTC
+ case TIOCGLTC:
+ return get_ltchars(real_tty, p);
+ case TIOCSLTC:
+ return set_ltchars(real_tty, p);
+#endif
+ case TCGETS:
+ if (kernel_termios_to_user_termios((struct termios __user *)arg, real_tty->termios))
+ return -EFAULT;
+ return 0;
+ case TCSETSF:
+ return set_termios(real_tty, p, TERMIOS_FLUSH | TERMIOS_WAIT);
+ case TCSETSW:
+ return set_termios(real_tty, p, TERMIOS_WAIT);
+ case TCSETS:
+ return set_termios(real_tty, p, 0);
+ case TCGETA:
+ return get_termio(real_tty, p);
+ case TCSETAF:
+ return set_termios(real_tty, p, TERMIOS_FLUSH | TERMIOS_WAIT | TERMIOS_TERMIO);
+ case TCSETAW:
+ return set_termios(real_tty, p, TERMIOS_WAIT | TERMIOS_TERMIO);
+ case TCSETA:
+ return set_termios(real_tty, p, TERMIOS_TERMIO);
+ case TCXONC:
+ retval = tty_check_change(tty);
+ if (retval)
+ return retval;
+ switch (arg) {
+ case TCOOFF:
+ if (!tty->flow_stopped) {
+ tty->flow_stopped = 1;
+ stop_tty(tty);
+ }
+ break;
+ case TCOON:
+ if (tty->flow_stopped) {
+ tty->flow_stopped = 0;
+ start_tty(tty);
+ }
+ break;
+ case TCIOFF:
+ if (STOP_CHAR(tty) != __DISABLED_CHAR)
+ send_prio_char(tty, STOP_CHAR(tty));
+ break;
+ case TCION:
+ if (START_CHAR(tty) != __DISABLED_CHAR)
+ send_prio_char(tty, START_CHAR(tty));
+ break;
+ default:
+ return -EINVAL;
+ }
+ return 0;
+ case TCFLSH:
+ retval = tty_check_change(tty);
+ if (retval)
+ return retval;
+
+ ld = tty_ldisc_ref(tty);
+ switch (arg) {
+ case TCIFLUSH:
+ if (ld->flush_buffer)
+ ld->flush_buffer(tty);
+ break;
+ case TCIOFLUSH:
+ if (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;
+ case TIOCOUTQ:
+ return put_user(tty->driver->chars_in_buffer ?
+ tty->driver->chars_in_buffer(tty) : 0,
+ (int __user *) arg);
+ case TIOCINQ:
+ retval = tty->read_cnt;
+ if (L_ICANON(tty))
+ retval = inq_canon(tty);
+ return put_user(retval, (unsigned int __user *) arg);
+ 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;
+
+ case TIOCPKT:
+ {
+ int pktmode;
+
+ if (tty->driver->type != TTY_DRIVER_TYPE_PTY ||
+ tty->driver->subtype != PTY_TYPE_MASTER)
+ return -ENOTTY;
+ if (get_user(pktmode, (int __user *) arg))
+ return -EFAULT;
+ if (pktmode) {
+ if (!tty->packet) {
+ tty->packet = 1;
+ tty->link->ctrl_status = 0;
+ }
+ } else
+ 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;
+ down(&tty->termios_sem);
+ tty->termios->c_cflag =
+ ((tty->termios->c_cflag & ~CLOCAL) |
+ (arg ? CLOCAL : 0));
+ up(&tty->termios_sem);
+ return 0;
+ default:
+ return -ENOIOCTLCMD;
+ }
+}
+
+EXPORT_SYMBOL(n_tty_ioctl);