* Copyright (c) 1982, 1986, 1989 The Regents of the University of California.
* All rights reserved.
*
- * %sccs.include.redist.c%
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ * must display the following acknowledgement:
+ * This product includes software developed by the University of
+ * California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
*
- * @(#)tty_pty.c 7.18 (Berkeley) %G%
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * @(#)tty_pty.c 7.21 (Berkeley) 5/30/91
*/
/*
#include "systm.h"
#include "ioctl.h"
#include "tty.h"
-#include "user.h"
#include "conf.h"
#include "file.h"
#include "proc.h"
#include "uio.h"
#include "kernel.h"
#include "vnode.h"
-#include "tsleep.h"
#if NPTY == 1
#undef NPTY
struct proc *pt_selr, *pt_selw;
u_char pt_send;
u_char pt_ucntl;
- struct clist pt_ioc;
} pt_ioctl[NPTY];
int npty = NPTY; /* for pstat -t */
-int ptydebug = 0;
-
-#define PF_RCOLL 0x0001
-#define PF_WCOLL 0x0002
-#define PF_NBIO 0x0004
-#define PF_PKT 0x0008 /* packet mode */
-#define PF_STOPPED 0x0010 /* user told stopped */
-#define PF_REMOTE 0x0020 /* remote and flow controlled input */
-#define PF_NOSTOP 0x0040
-#define PF_UCNTL 0x0080 /* user control mode */
-#define PF_TIOC 0x0100 /* transparent control mode */
-#define PF_LIOC 0x0200 /* transparent control locked */
-#define PF_WIOC 0x0400 /* waiting for PF_LIOC to clear */
-#define PF_BLOCK 0x0800 /* block writes to slave */
-#define PF_OWAIT 0x1000 /* waiting for PF_BLOCK to clear */
+#define PF_RCOLL 0x01
+#define PF_WCOLL 0x02
+#define PF_PKT 0x08 /* packet mode */
+#define PF_STOPPED 0x10 /* user told stopped */
+#define PF_REMOTE 0x20 /* remote and flow controlled input */
+#define PF_NOSTOP 0x40
+#define PF_UCNTL 0x80 /* user control mode */
/*ARGSUSED*/
-ptsopen(dev, flag)
+ptsopen(dev, flag, devtype, p)
dev_t dev;
+ struct proc *p;
{
- struct proc *p = curproc;
register struct tty *tp;
int error;
tp->t_state |= TS_CARR_ON;
while ((tp->t_state & TS_CARR_ON) == 0) {
tp->t_state |= TS_WOPEN;
- if (flag&FNDELAY)
+ if (flag&FNONBLOCK)
break;
if (error = ttysleep(tp, (caddr_t)&tp->t_rawq, TTIPRI | PCATCH,
ttopen, 0))
return (error);
}
-ptsclose(dev)
+ptsclose(dev, flag, mode, p)
dev_t dev;
+ int flag, mode;
+ struct proc *p;
{
register struct tty *tp;
tp = &pt_tty[minor(dev)];
- (*linesw[tp->t_line].l_close)(tp);
+ (*linesw[tp->t_line].l_close)(tp, flag);
ttyclose(tp);
ptcwakeup(tp, FREAD|FWRITE);
- return (0);
}
ptsread(dev, uio, flag)
dev_t dev;
struct uio *uio;
{
- register struct tty *tp = &pt_tty[minor(dev)];
- register struct pt_ioctl *pti = &pt_ioctl[minor(dev)];
+ register struct tty *tp;
+ tp = &pt_tty[minor(dev)];
if (tp->t_oproc == 0)
return (EIO);
-
- while (pti->pt_flags & PF_BLOCK) {
- pti->pt_flags |= PF_OWAIT;
- sleep((caddr_t)pti + 1, TTOPRI);
- }
-
return ((*linesw[tp->t_line].l_write)(tp, uio, flag));
}
pti->pt_selw = 0;
pti->pt_flags &= ~PF_WCOLL;
}
-if (ptydebug) printf("WAKEUP c_cf %d\n", curproc->p_pid);
wakeup((caddr_t)&tp->t_rawq.c_cf);
}
}
/*ARGSUSED*/
-ptcopen(dev, flag)
+#ifdef __STDC__
+ptcopen(dev_t dev, int flag, int devtype, struct proc *p)
+#else
+ptcopen(dev, flag, devtype, p)
dev_t dev;
- int flag;
+ int flag, devtype;
+ struct proc *p;
+#endif
{
register struct tty *tp;
struct pt_ioctl *pti;
tp->t_state &= ~TS_CARR_ON;
tp->t_oproc = 0; /* mark closed */
tp->t_session = 0;
- return (0);
}
ptcread(dev, uio, flag)
pti->pt_ucntl = 0;
return (0);
}
- if (pti->pt_flags&PF_TIOC && pti->pt_ioc.c_cc) {
- if (uio->uio_resid < pti->pt_ioc.c_cc + 1)
- return (E2BIG);
- error = ureadc(TIOCPKT_TIOC, uio);
- while (error == 0 && pti->pt_ioc.c_cc > 0) {
- cc = q_to_b(&pti->pt_ioc, buf,
- MIN(pti->pt_ioc.c_cc, BUFSIZ));
- if (cc <= 0) /* impossible? */
- break;
- error = uiomove(buf, cc, UIO_READ, uio);
- }
- return (error);
- }
if (tp->t_outq.c_cc && (tp->t_state&TS_TTSTOP) == 0)
break;
}
ttyin, 0))
return (error);
}
- if (pti->pt_flags & (PF_PKT|PF_UCNTL|PF_TIOC))
+ if (pti->pt_flags & (PF_PKT|PF_UCNTL))
error = ureadc(0, uio);
while (uio->uio_resid > 0 && error == 0) {
cc = q_to_b(&tp->t_outq, buf, MIN(uio->uio_resid, BUFSIZ));
break;
error = uiomove(buf, cc, uio);
}
- if (tp->t_outq.c_cc <= TTLOWAT(tp) && !(pti->pt_flags & PF_BLOCK))
- ptswake(tp);
- return (error);
-}
-
-ptswake(tp)
- register struct tty *tp;
-{
- if (tp->t_state&TS_ASLEEP) {
- tp->t_state &= ~TS_ASLEEP;
- wakeup((caddr_t)&tp->t_outq);
- }
- if (tp->t_wsel) {
- selwakeup(tp->t_wsel, tp->t_state & TS_WCOLL);
- tp->t_wsel = 0;
- tp->t_state &= ~TS_WCOLL;
+ if (tp->t_outq.c_cc <= tp->t_lowat) {
+ if (tp->t_state&TS_ASLEEP) {
+ tp->t_state &= ~TS_ASLEEP;
+ wakeup((caddr_t)&tp->t_outq);
+ }
+ if (tp->t_wsel) {
+ selwakeup(tp->t_wsel, tp->t_state & TS_WCOLL);
+ tp->t_wsel = 0;
+ tp->t_state &= ~TS_WCOLL;
+ }
}
+ return (error);
}
ptsstop(tp, flush)
ptcwakeup(tp, flag);
}
-ptcselect(dev, rw)
+ptcselect(dev, rw, p)
dev_t dev;
int rw;
+ struct proc *p;
{
- struct proc *curp = curproc;
register struct tty *tp = &pt_tty[minor(dev)];
struct pt_ioctl *pti = &pt_ioctl[minor(dev)];
- struct proc *p;
+ struct proc *prev;
int s;
if ((tp->t_state&TS_CARR_ON) == 0)
case 0: /* exceptional */
if ((tp->t_state&TS_ISOPEN) &&
(pti->pt_flags&PF_PKT && pti->pt_send ||
- pti->pt_flags&PF_TIOC && pti->pt_ioc.c_cc ||
pti->pt_flags&PF_UCNTL && pti->pt_ucntl))
return (1);
- if ((p = pti->pt_selr) && p->p_wchan == (caddr_t)&selwait)
+ if ((prev = pti->pt_selr) && prev->p_wchan == (caddr_t)&selwait)
pti->pt_flags |= PF_RCOLL;
else
- pti->pt_selr = curp;
+ pti->pt_selr = p;
break;
return (1);
}
}
- if ((p = pti->pt_selw) && p->p_wchan == (caddr_t)&selwait)
+ if ((prev = pti->pt_selw) && prev->p_wchan == (caddr_t)&selwait)
pti->pt_flags |= PF_WCOLL;
else
- pti->pt_selw = curp;
+ pti->pt_selw = p;
break;
}
}
return(0);
} else
- if (cdevsw[major(dev)].d_open == ptcopen) {
- if ((cmd & 0xffff) == (TIOCIOANS(0) & 0xffff)) {
- if (!(pti->pt_flags & PF_LIOC) || pti->pt_ioc.c_cc)
- return (EINVAL);
- (void) b_to_q(data, IOCPARM_LEN(cmd), &pti->pt_ioc);
- wakeup((caddr_t)&pti->pt_ioc);
- return (0);
- }
+ if (cdevsw[major(dev)].d_open == ptcopen)
switch (cmd) {
case TIOCGPGRP:
pti->pt_flags &= ~PF_UCNTL;
return (0);
- case TIOCTIOC:
- if (*(int *)data) {
- if (pti->pt_flags & PF_UCNTL)
- return (EINVAL);
- pti->pt_flags |= PF_TIOC;
- } else {
- pti->pt_flags &= ~(PF_TIOC|PF_LIOC|PF_WIOC);
- while (pti->pt_ioc.c_cc)
- (void) getc(&pti->pt_ioc);
- wakeup((caddr_t)&pti->pt_ioc);
- }
- return (0);
-
- case TIOCBLK:
- if (*(int *)data)
- pti->pt_flags |= PF_BLOCK;
- else {
- if (pti->pt_flags & PF_OWAIT)
- wakeup((caddr_t)pti + 1);
- pti->pt_flags &= ~(PF_BLOCK|PF_OWAIT);
- ptswake(tp);
- }
- return (0);
-
case TIOCREMOTE:
if (*(int *)data)
pti->pt_flags |= PF_REMOTE;
ttyflush(tp, FREAD|FWRITE);
return (0);
- case FIONREAD:
- *(int *)data = tp->t_outq.c_cc;
- return (0);
-
case TIOCSETP:
case TIOCSETN:
case TIOCSETD:
ttyinfo(tp);
return(0);
}
- } else if (pti->pt_flags & PF_TIOC) {
- while (pti->pt_flags & PF_LIOC) {
- pti->pt_flags |= PF_WIOC;
- switch (tsleep((caddr_t)&pti->pt_flags,TTIPRI-1,5*hz)) {
- case TS_OK:
- continue;
- case TS_SIG:
- case TS_TIME:
- return (EBUSY);
- }
- }
- pti->pt_flags |= PF_LIOC | PF_BLOCK;
- while (pti->pt_ioc.c_cc)
- (void) getc(&pti->pt_ioc);
- (void) b_to_q(&cmd, sizeof cmd, &pti->pt_ioc);
- if (cmd & IOC_IN)
- (void) b_to_q(data, IOCPARM_LEN(cmd), &pti->pt_ioc);
- ptcwakeup(tp, FREAD);
- switch (tsleep((caddr_t)&pti->pt_ioc, TTIPRI-1, 5*hz)) {
- case TS_SIG:
- case TS_TIME:
- while (pti->pt_ioc.c_cc)
- (void) getc(&pti->pt_ioc);
- if (pti->pt_flags & PF_WIOC)
- wakeup((caddr_t)&pti->pt_flags);
- if (pti->pt_flags & PF_OWAIT)
- wakeup((caddr_t)pti + 1);
- pti->pt_flags &= ~(PF_LIOC|PF_WIOC|PF_BLOCK|PF_OWAIT);
- ptswake(tp);
- return (EBUSY);
- case TS_OK:
- break;
- }
- if (pti->pt_ioc.c_cc == 0) {
- if (pti->pt_flags & PF_WIOC)
- wakeup((caddr_t)&pti->pt_flags);
- if (pti->pt_flags & PF_OWAIT)
- wakeup((caddr_t)pti + 1);
- pti->pt_flags &= ~(PF_LIOC|PF_WIOC|PF_BLOCK|PF_OWAIT);
- ptswake(tp);
- goto doioctl;
- }
- if (q_to_b(&pti->pt_ioc, &error, sizeof error) != sizeof error)
- error = EINVAL;
- if (error == 0 && cmd & IOC_OUT) {
- if (IOCPARM_LEN(cmd) != pti->pt_ioc.c_cc)
- error = EINVAL;
- else
- (void) q_to_b(&pti->pt_ioc, data,
- pti->pt_ioc.c_cc);
- }
- while (pti->pt_ioc.c_cc)
- (void) getc(&pti->pt_ioc);
- if (pti->pt_flags & PF_WIOC)
- wakeup((caddr_t)&pti->pt_flags);
- if (pti->pt_flags & PF_OWAIT)
- wakeup((caddr_t)pti + 1);
- pti->pt_flags &= ~(PF_LIOC|PF_WIOC|PF_BLOCK|PF_OWAIT);
- ptswake(tp);
- return (error);
- }
-
- doioctl:
error = (*linesw[tp->t_line].l_ioctl)(tp, cmd, data, flag);
if (error < 0)
error = ttioctl(tp, cmd, data, flag);
* pty's can't be switched to disciplines which overwrite
* the queues. We can't tell anything about the discipline
* from here...
- *
- * Nb: this is not really good enough, the line disc open routine
- * may have done anything at all, no guarantees that close
- * will fix it. This also has the effect of losing the
- * previous discipline, which an error on a TIOCSETD shouldn't
- * do... Sometime it should be done via an explicit check
- * for TIOCSETD, then check to see what linesw[new_number].l_rint
- * really is.
*/
if (linesw[tp->t_line].l_rint != ttyinput) {
- (*linesw[tp->t_line].l_close)(tp);
+ (*linesw[tp->t_line].l_close)(tp, flag);
tp->t_line = TTYDISC;
(void)(*linesw[tp->t_line].l_open)(dev, tp, flag);
error = ENOTTY;
}
-
if (error < 0) {
if (pti->pt_flags & PF_UCNTL &&
(cmd & ~0xff) == UIOCCMD(0)) {