-/* tty.c 3.19 %G% */
-
/*
- * TTY subroutines common to more than one line discipline
+ * Copyright (c) 1982, 1986 Regents of the University of California.
+ * All rights reserved. The Berkeley software License Agreement
+ * specifies the terms and conditions for redistribution.
+ *
+ * @(#)tty.c 7.9 (Berkeley) %G%
*/
-#include "../h/param.h"
-#include "../h/systm.h"
-#include "../h/dir.h"
-#include "../h/user.h"
-#include "../h/tty.h"
-#include "../h/proc.h"
-#include "../h/mx.h"
-#include "../h/inode.h"
-#include "../h/file.h"
-#include "../h/reg.h"
-#include "../h/conf.h"
-#include "../h/buf.h"
-#include "../h/dk.h"
-
-char partab[];
+
+#include "../machine/reg.h"
+
+#include "param.h"
+#include "systm.h"
+#include "dir.h"
+#include "user.h"
+#include "ioctl.h"
+#include "tty.h"
+#include "proc.h"
+#include "file.h"
+#include "conf.h"
+#include "dkstat.h"
+#include "uio.h"
+#include "kernel.h"
/*
- * When running dz's using only SAE (silo alarm) on input
- * it is necessary to call dzrint() at clock interrupt time.
- * This is unsafe unless spl5()s in tty code are changed to
- * spl6()s to block clock interrupts. Note that the dh driver
- * currently in use works the same way as the dz, even though
- * we could try to more intelligently manage its silo.
- * Thus don't take this out if you have no dz's unless you
- * change clock.c and dhtimer().
+ * Table giving parity for characters and indicating
+ * character classes to tty driver. In particular,
+ * if the low 6 bits are 0, then the character needs
+ * no special processing on output.
*/
-#define spl5 spl6
+
+char partab[] = {
+ 0001,0201,0201,0001,0201,0001,0001,0201,
+ 0202,0004,0003,0201,0005,0206,0201,0001,
+ 0201,0001,0001,0201,0001,0201,0201,0001,
+ 0001,0201,0201,0001,0201,0001,0001,0201,
+ 0200,0000,0000,0200,0000,0200,0200,0000,
+ 0000,0200,0200,0000,0200,0000,0000,0200,
+ 0000,0200,0200,0000,0200,0000,0000,0200,
+ 0200,0000,0000,0200,0000,0200,0200,0000,
+ 0200,0000,0000,0200,0000,0200,0200,0000,
+ 0000,0200,0200,0000,0200,0000,0000,0200,
+ 0000,0200,0200,0000,0200,0000,0000,0200,
+ 0200,0000,0000,0200,0000,0200,0200,0000,
+ 0000,0200,0200,0000,0200,0000,0000,0200,
+ 0200,0000,0000,0200,0000,0200,0200,0000,
+ 0200,0000,0000,0200,0000,0200,0200,0000,
+ 0000,0200,0200,0000,0200,0000,0000,0201,
+
+ /*
+ * 7 bit ascii ends with the last character above,
+ * but we contine through all 256 codes for the sake
+ * of the tty output routines which use special vax
+ * instructions which need a 256 character trt table.
+ */
+
+ 0007,0007,0007,0007,0007,0007,0007,0007,
+ 0007,0007,0007,0007,0007,0007,0007,0007,
+ 0007,0007,0007,0007,0007,0007,0007,0007,
+ 0007,0007,0007,0007,0007,0007,0007,0007,
+ 0007,0007,0007,0007,0007,0007,0007,0007,
+ 0007,0007,0007,0007,0007,0007,0007,0007,
+ 0007,0007,0007,0007,0007,0007,0007,0007,
+ 0007,0007,0007,0007,0007,0007,0007,0007,
+ 0007,0007,0007,0007,0007,0007,0007,0007,
+ 0007,0007,0007,0007,0007,0007,0007,0007,
+ 0007,0007,0007,0007,0007,0007,0007,0007,
+ 0007,0007,0007,0007,0007,0007,0007,0007,
+ 0007,0007,0007,0007,0007,0007,0007,0007,
+ 0007,0007,0007,0007,0007,0007,0007,0007,
+ 0007,0007,0007,0007,0007,0007,0007,0007,
+ 0007,0007,0007,0007,0007,0007,0007,0007
+};
/*
* Input mapping table-- if an entry is non-zero, when the
* sequence is replaced by the table value. Mostly used for
* upper-case only terminals.
*/
-
char maptab[] ={
000,000,000,000,000,000,000,000,
000,000,000,000,000,000,000,000,
};
short tthiwat[16] =
- { 100,100,100,100,100,100,100,200,200,400,400,400,650,650,650,650 };
+ { 100,100,100,100,100,100,100,200,200,400,400,400,650,650,1300,2000 };
short ttlowat[16] =
{ 30, 30, 30, 30, 30, 30, 30, 50, 50,120,120,120,125,125,125,125 };
-#define OBUFSIZ 100
+struct ttychars ttydefaults = {
+ CERASE, CKILL, CINTR, CQUIT, CSTART, CSTOP, CEOF,
+ CBRK, CSUSP, CDSUSP, CRPRNT, CFLUSH, CWERASE,CLNEXT
+};
+
+extern struct tty *constty; /* temporary virtual console */
-/*
- * set default control characters.
- */
ttychars(tp)
-register struct tty *tp;
+ struct tty *tp;
{
- tun.t_intrc = CINTR;
- tun.t_quitc = CQUIT;
- tun.t_startc = CSTART;
- tun.t_stopc = CSTOP;
- tun.t_eofc = CEOT;
- tun.t_brkc = CBRK;
- tp->t_erase = CERASE;
- tp->t_kill = CKILL;
-/* begin local */
- tlun.t_suspc = CTRL(z);
- tlun.t_dsuspc = CTRL(y);
- tlun.t_rprntc = CTRL(r);
- tlun.t_flushc = CTRL(o);
- tlun.t_werasc = CTRL(w);
- tlun.t_lnextc = CTRL(v);
- tp->t_local = 0;
- tp->t_lstate = 0;
-/* end local */
+ tp->t_chars = ttydefaults;
}
/*
* Wait for output to drain, then flush input waiting.
*/
-wflushtty(tp)
-register struct tty *tp;
+ttywflush(tp)
+ register struct tty *tp;
{
- (void) spl5();
- while (tp->t_outq.c_cc && tp->t_state&CARR_ON) {
+ ttywait(tp);
+ ttyflush(tp, FREAD);
+}
+
+ttywait(tp)
+ register struct tty *tp;
+{
+ register int s = spltty();
+
+ while ((tp->t_outq.c_cc || tp->t_state&TS_BUSY) &&
+ tp->t_state&TS_CARR_ON && tp->t_oproc) {
(*tp->t_oproc)(tp);
- tp->t_state |= ASLEEP;
+ tp->t_state |= TS_ASLEEP;
sleep((caddr_t)&tp->t_outq, TTOPRI);
}
- flushtty(tp, FREAD|FWRITE);
- (void) spl0();
+ splx(s);
}
/*
- * flush all TTY queues
+ * Flush all TTY queues
*/
-flushtty(tp, rw)
-register struct tty *tp;
+ttyflush(tp, rw)
+ register struct tty *tp;
{
register s;
- if (tp->t_line == NETLDISC)
- return;
- s = spl6();
+ s = spltty();
if (rw & FREAD) {
while (getc(&tp->t_canq) >= 0)
;
}
if (rw & FWRITE) {
wakeup((caddr_t)&tp->t_outq);
- tp->t_state &= ~TTSTOP;
- (*cdevsw[major(tp->t_dev)].d_stop)(tp);
+ tp->t_state &= ~TS_TTSTOP;
+ (*cdevsw[major(tp->t_dev)].d_stop)(tp, rw);
while (getc(&tp->t_outq) >= 0)
;
}
if (rw & FREAD) {
while (getc(&tp->t_rawq) >= 0)
;
- tp->t_delct = 0;
- tp->t_rocount = 0; /* local */
+ tp->t_rocount = 0;
tp->t_rocol = 0;
- tp->t_lstate = 0;
+ tp->t_state &= ~TS_LOCAL;
}
splx(s);
}
* Send stop character on input overflow.
*/
ttyblock(tp)
-register struct tty *tp;
+ register struct tty *tp;
{
register x;
+
x = tp->t_rawq.c_cc + tp->t_canq.c_cc;
if (tp->t_rawq.c_cc > TTYHOG) {
- flushtty(tp, FREAD|FWRITE);
- tp->t_state &= ~TBLOCK;
+ ttyflush(tp, FREAD|FWRITE);
+ tp->t_state &= ~TS_TBLOCK;
}
- if (x >= TTYHOG/2) {
- if (putc(tun.t_stopc, &tp->t_outq)==0) {
- tp->t_state |= TBLOCK;
- tp->t_char++;
+ /*
+ * Block further input iff:
+ * Current input > threshold AND input is available to user program
+ */
+ if (x >= TTYHOG/2 &&
+ ((tp->t_flags & (RAW|CBREAK)) || (tp->t_canq.c_cc > 0))) {
+ if (putc(tp->t_stopc, &tp->t_outq)==0) {
+ tp->t_state |= TS_TBLOCK;
ttstart(tp);
}
}
* subroutine and it is called during a clock interrupt.
*/
ttrstrt(tp)
-register struct tty *tp;
+ register struct tty *tp;
{
- tp->t_state &= ~TIMEOUT;
+ if (tp == 0)
+ panic("ttrstrt");
+ tp->t_state &= ~TS_TIMEOUT;
ttstart(tp);
}
* character, and after a timeout has finished.
*/
ttstart(tp)
-register struct tty *tp;
+ register struct tty *tp;
{
- register s;
- s = spl5();
- if((tp->t_state&(TIMEOUT|TTSTOP|BUSY)) == 0)
+ if (tp->t_oproc) /* kludge for pty */
(*tp->t_oproc)(tp);
- splx(s);
}
/*
* Common code for tty ioctls.
*/
-ttioctl(com, tp, addr, dev, flag)
-register struct tty *tp;
-caddr_t addr;
+/*ARGSUSED*/
+ttioctl(tp, com, data, flag)
+ register struct tty *tp;
+ caddr_t data;
{
- unsigned t;
- struct sgttyb iocb;
- struct clist tq;
+ int dev = tp->t_dev;
extern int nldisp;
- register c;
- int temp;
+ int s;
+ register int newflags;
- /*
- * This is especially so that isatty() will
- * fail when carrier is gone.
- */
- if ((tp->t_state&CARR_ON) == 0) {
- u.u_error = EBADF;
- return (1);
- }
/*
* If the ioctl involves modification,
- * insist on being able to write the device,
- * and hang if in the background.
+ * hang if in the background.
*/
- switch(com) {
+ switch (com) {
case TIOCSETD:
case TIOCSETP:
case TIOCLBIC:
case TIOCLSET:
case TIOCSTI:
-/* this is reasonable, but impractical...
- if ((flag & FWRITE) == 0) {
- u.u_error = EBADF;
- return (1);
- }
- */
+ case TIOCSWINSZ:
while (tp->t_line == NTTYDISC &&
u.u_procp->p_pgrp != tp->t_pgrp && tp == u.u_ttyp &&
(u.u_procp->p_flag&SVFORK) == 0 &&
- u.u_signal[SIGTTOU] != SIG_IGN &&
- u.u_signal[SIGTTOU] != SIG_HOLD &&
- (u.u_procp->p_flag&SDETACH)==0) {
+ !(u.u_procp->p_sigignore & sigmask(SIGTTOU)) &&
+ !(u.u_procp->p_sigmask & sigmask(SIGTTOU))) {
gsignal(u.u_procp->p_pgrp, SIGTTOU);
sleep((caddr_t)&lbolt, TTOPRI);
}
/*
* Process the ioctl.
*/
- switch(com) {
+ switch (com) {
- /*
- * Get discipline number
- */
+ /* get discipline number */
case TIOCGETD:
- t = tp->t_line;
- if (copyout((caddr_t)&t, addr, sizeof(t)))
- u.u_error = EFAULT;
+ *(int *)data = tp->t_line;
break;
- /*
- * Set line discipline
- */
- case TIOCSETD:
- if (copyin(addr, (caddr_t)&t, sizeof(t))) {
- u.u_error = EFAULT;
- break;
- }
- if (t >= nldisp) {
- u.u_error = ENXIO;
- break;
- }
- (void) spl5();
- if (tp->t_line)
+ /* set line discipline */
+ case TIOCSETD: {
+ register int t = *(int *)data;
+ int error = 0;
+
+ if ((unsigned) t >= nldisp)
+ return (ENXIO);
+ if (t != tp->t_line) {
+ s = spltty();
(*linesw[tp->t_line].l_close)(tp);
- if (t)
- (*linesw[t].l_open)(dev, tp, addr);
- if (u.u_error==0)
+ error = (*linesw[t].l_open)(dev, tp);
+ if (error) {
+ (void) (*linesw[tp->t_line].l_open)(dev, tp);
+ splx(s);
+ return (error);
+ }
tp->t_line = t;
- (void) spl0();
+ splx(s);
+ }
break;
+ }
- /*
- * Prevent more opens on channel
- */
+ /* prevent more opens on channel */
case TIOCEXCL:
- tp->t_state |= XCLUDE;
+ tp->t_state |= TS_XCLUDE;
break;
case TIOCNXCL:
- tp->t_state &= ~XCLUDE;
+ tp->t_state &= ~TS_XCLUDE;
+ break;
+
+ /* hang up line on last close */
+ case TIOCHPCL:
+ tp->t_state |= TS_HUPCLS;
+ break;
+
+ case TIOCFLUSH: {
+ register int flags = *(int *)data;
+
+ if (flags == 0)
+ flags = FREAD|FWRITE;
+ else
+ flags &= FREAD|FWRITE;
+ ttyflush(tp, flags);
+ break;
+ }
+
+ /* return number of characters immediately available */
+ case FIONREAD:
+ *(off_t *)data = ttnread(tp);
+ break;
+
+ case TIOCOUTQ:
+ *(int *)data = tp->t_outq.c_cc;
+ break;
+
+ case TIOCSTOP:
+ s = spltty();
+ if ((tp->t_state&TS_TTSTOP) == 0) {
+ tp->t_state |= TS_TTSTOP;
+ (*cdevsw[major(tp->t_dev)].d_stop)(tp, 0);
+ }
+ splx(s);
+ break;
+
+ case TIOCSTART:
+ s = spltty();
+ if ((tp->t_state&TS_TTSTOP) || (tp->t_flags&FLUSHO)) {
+ tp->t_state &= ~TS_TTSTOP;
+ tp->t_flags &= ~FLUSHO;
+ ttstart(tp);
+ }
+ splx(s);
break;
/*
- * Set new parameters
+ * Simulate typing of a character at the terminal.
*/
+ case TIOCSTI:
+ if (u.u_uid && (flag & FREAD) == 0)
+ return (EPERM);
+ if (u.u_uid && u.u_ttyp != tp)
+ return (EACCES);
+ (*linesw[tp->t_line].l_rint)(*(char *)data, tp);
+ break;
+
case TIOCSETP:
- case TIOCSETN:
- if (copyin(addr, (caddr_t)&iocb, sizeof(iocb))) {
- u.u_error = EFAULT;
- return(1);
- }
- (void) spl5();
- if (tp->t_line == 0) {
- if (com == TIOCSETP)
- wflushtty(tp);
- while (canon(tp)>=0)
- ;
- } else if (tp->t_line == NTTYDISC) {
- if (tp->t_flags&RAW || iocb.sg_flags&RAW ||
- com == TIOCSETP)
- wflushtty(tp);
- else if ((tp->t_flags&CBREAK) != (iocb.sg_flags&CBREAK)) {
- if (iocb.sg_flags & CBREAK) {
- catq(&tp->t_rawq, &tp->t_canq);
- tq = tp->t_rawq;
- tp->t_rawq = tp->t_canq;
- tp->t_canq = tq;
- } else {
- tp->t_local |= LPENDIN;
- if (tp->t_canq.c_cc)
- panic("ioccom canq");
- if (tp->t_chan)
- (void) sdata(tp->t_chan);
- else
- wakeup((caddr_t)&tp->t_rawq);
- }
+ case TIOCSETN: {
+ register struct sgttyb *sg = (struct sgttyb *)data;
+
+ tp->t_erase = sg->sg_erase;
+ tp->t_kill = sg->sg_kill;
+ tp->t_ispeed = sg->sg_ispeed;
+ tp->t_ospeed = sg->sg_ospeed;
+ newflags = (tp->t_flags&0xffff0000) | (sg->sg_flags&0xffff);
+ s = spltty();
+ if (tp->t_flags&RAW || newflags&RAW || com == TIOCSETP) {
+ ttywait(tp);
+ ttyflush(tp, FREAD);
+ } else if ((tp->t_flags&CBREAK) != (newflags&CBREAK)) {
+ if (newflags&CBREAK) {
+ struct clist tq;
+
+ catq(&tp->t_rawq, &tp->t_canq);
+ tq = tp->t_rawq;
+ tp->t_rawq = tp->t_canq;
+ tp->t_canq = tq;
+ } else {
+ tp->t_flags |= PENDIN;
+ newflags |= PENDIN;
+ ttwakeup(tp);
}
}
- if ((tp->t_state&SPEEDS)==0) {
- tp->t_ispeed = iocb.sg_ispeed;
- tp->t_ospeed = iocb.sg_ospeed;
+ tp->t_flags = newflags;
+ if (tp->t_flags&RAW) {
+ tp->t_state &= ~TS_TTSTOP;
+ ttstart(tp);
}
- tp->t_erase = iocb.sg_erase;
- tp->t_kill = iocb.sg_kill;
- tp->t_flags = iocb.sg_flags;
- (void) spl0();
+ splx(s);
+ break;
+ }
+
+ /* send current parameters to user */
+ case TIOCGETP: {
+ register struct sgttyb *sg = (struct sgttyb *)data;
+
+ sg->sg_ispeed = tp->t_ispeed;
+ sg->sg_ospeed = tp->t_ospeed;
+ sg->sg_erase = tp->t_erase;
+ sg->sg_kill = tp->t_kill;
+ sg->sg_flags = tp->t_flags;
+ break;
+ }
+
+ case FIONBIO:
+ if (*(int *)data)
+ tp->t_state |= TS_NBIO;
+ else
+ tp->t_state &= ~TS_NBIO;
+ break;
+
+ case FIOASYNC:
+ if (*(int *)data)
+ tp->t_state |= TS_ASYNC;
+ else
+ tp->t_state &= ~TS_ASYNC;
+ break;
+
+ case TIOCGETC:
+ bcopy((caddr_t)&tp->t_intrc, data, sizeof (struct tchars));
+ break;
+
+ case TIOCSETC:
+ bcopy(data, (caddr_t)&tp->t_intrc, sizeof (struct tchars));
+ break;
+
+ /* set/get local special characters */
+ case TIOCSLTC:
+ bcopy(data, (caddr_t)&tp->t_suspc, sizeof (struct ltchars));
+ break;
+
+ case TIOCGLTC:
+ bcopy((caddr_t)&tp->t_suspc, data, sizeof (struct ltchars));
break;
/*
- * Send current parameters to user
+ * Modify local mode word.
*/
- case TIOCGETP:
- iocb.sg_ispeed = tp->t_ispeed;
- iocb.sg_ospeed = tp->t_ospeed;
- iocb.sg_erase = tp->t_erase;
- iocb.sg_kill = tp->t_kill;
- iocb.sg_flags = tp->t_flags;
- if (copyout((caddr_t)&iocb, addr, sizeof(iocb)))
- u.u_error = EFAULT;
+ case TIOCLBIS:
+ tp->t_flags |= *(int *)data << 16;
+ break;
+
+ case TIOCLBIC:
+ tp->t_flags &= ~(*(int *)data << 16);
+ break;
+
+ case TIOCLSET:
+ tp->t_flags &= 0xffff;
+ tp->t_flags |= *(int *)data << 16;
+ break;
+
+ case TIOCLGET:
+ *(int *)data = ((unsigned)tp->t_flags) >> 16;
break;
/*
- * Hang up line on last close
+ * Allow SPGRP only if tty is open for reading.
+ * Quick check: if we can find a process in the new pgrp,
+ * this user must own that process.
+ * SHOULD VERIFY THAT PGRP IS IN USE AND IS THIS USER'S.
*/
- case TIOCHPCL:
- tp->t_state |= HUPCLS;
+ case TIOCSPGRP: {
+ struct proc *p;
+ int pgrp = *(int *)data;
+
+ if (u.u_uid && (flag & FREAD) == 0)
+ return (EPERM);
+ p = pfind(pgrp);
+ if (p && p->p_pgrp == pgrp &&
+ p->p_uid != u.u_uid && u.u_uid && !inferior(p))
+ return (EPERM);
+ tp->t_pgrp = pgrp;
break;
+ }
- case TIOCFLUSH:
- flushtty(tp, FREAD|FWRITE);
+ case TIOCGPGRP:
+ *(int *)data = tp->t_pgrp;
+ break;
+
+ case TIOCSWINSZ:
+ if (bcmp((caddr_t)&tp->t_winsize, data,
+ sizeof (struct winsize))) {
+ tp->t_winsize = *(struct winsize *)data;
+ gsignal(tp->t_pgrp, SIGWINCH);
+ }
+ break;
+
+ case TIOCGWINSZ:
+ *(struct winsize *)data = tp->t_winsize;
+ break;
+
+ case TIOCCONS:
+ if (*(int *)data) {
+ if (constty != NULL)
+ return (EBUSY);
+#ifndef UCONSOLE
+ if (!suser())
+ return (EPERM);
+#endif
+ constty = tp;
+ } else if (tp == constty)
+ constty == NULL;
+ break;
+
+ default:
+ return (-1);
+ }
+ return (0);
+}
+
+ttnread(tp)
+ struct tty *tp;
+{
+ int nread = 0;
+
+ if (tp->t_flags & PENDIN)
+ ttypend(tp);
+ nread = tp->t_canq.c_cc;
+ if (tp->t_flags & (RAW|CBREAK))
+ nread += tp->t_rawq.c_cc;
+ return (nread);
+}
+
+ttselect(dev, rw)
+ dev_t dev;
+ int rw;
+{
+ register struct tty *tp = &cdevsw[major(dev)].d_ttys[minor(dev)];
+ int nread;
+ int s = spltty();
+
+ switch (rw) {
+
+ case FREAD:
+ nread = ttnread(tp);
+ if (nread > 0 || (tp->t_state & TS_CARR_ON) == 0)
+ goto win;
+ if (tp->t_rsel && tp->t_rsel->p_wchan == (caddr_t)&selwait)
+ tp->t_state |= TS_RCOLL;
+ else
+ tp->t_rsel = u.u_procp;
break;
+ case FWRITE:
+ if (tp->t_outq.c_cc <= TTLOWAT(tp))
+ goto win;
+ if (tp->t_wsel && tp->t_wsel->p_wchan == (caddr_t)&selwait)
+ tp->t_state |= TS_WCOLL;
+ else
+ tp->t_wsel = u.u_procp;
+ break;
+ }
+ splx(s);
+ return (0);
+win:
+ splx(s);
+ return (1);
+}
+
+/*
+ * Initial open of tty, or (re)entry to line discipline.
+ * Establish a process group for distribution of
+ * quits and interrupts from the tty.
+ */
+ttyopen(dev, tp)
+ dev_t dev;
+ register struct tty *tp;
+{
+ register struct proc *pp;
+
+ pp = u.u_procp;
+ tp->t_dev = dev;
+ if (pp->p_pgrp == 0) {
+ u.u_ttyp = tp;
+ u.u_ttyd = dev;
+ if (tp->t_pgrp == 0)
+ tp->t_pgrp = pp->p_pid;
+ pp->p_pgrp = tp->t_pgrp;
+ }
+ tp->t_state &= ~TS_WOPEN;
+ if ((tp->t_state & TS_ISOPEN) == 0) {
+ tp->t_state |= TS_ISOPEN;
+ bzero((caddr_t)&tp->t_winsize, sizeof(tp->t_winsize));
+ if (tp->t_line != NTTYDISC)
+ ttywflush(tp);
+ }
+ return (0);
+}
+
+/*
+ * "close" a line discipline
+ */
+ttylclose(tp)
+ register struct tty *tp;
+{
+
+ ttywflush(tp);
+ tp->t_line = 0;
+}
+
+/*
+ * clean tp on last close
+ */
+ttyclose(tp)
+ register struct tty *tp;
+{
+
+ if (constty == tp)
+ constty = NULL;
+ ttyflush(tp, FREAD|FWRITE);
+ tp->t_pgrp = 0;
+ tp->t_state = 0;
+}
+
+/*
+ * Handle modem control transition on a tty.
+ * Flag indicates new state of carrier.
+ * Returns 0 if the line should be turned off, otherwise 1.
+ */
+ttymodem(tp, flag)
+ register struct tty *tp;
+{
+
+ if ((tp->t_state&TS_WOPEN) == 0 && (tp->t_flags & MDMBUF)) {
+ /*
+ * MDMBUF: do flow control according to carrier flag
+ */
+ if (flag) {
+ tp->t_state &= ~TS_TTSTOP;
+ ttstart(tp);
+ } else if ((tp->t_state&TS_TTSTOP) == 0) {
+ tp->t_state |= TS_TTSTOP;
+ (*cdevsw[major(tp->t_dev)].d_stop)(tp, 0);
+ }
+ } else if (flag == 0) {
+ /*
+ * Lost carrier.
+ */
+ tp->t_state &= ~TS_CARR_ON;
+ if (tp->t_state & TS_ISOPEN) {
+ if ((tp->t_flags & NOHANG) == 0) {
+ gsignal(tp->t_pgrp, SIGHUP);
+ gsignal(tp->t_pgrp, SIGCONT);
+ ttyflush(tp, FREAD|FWRITE);
+ return (0);
+ }
+ }
+ } else {
+ /*
+ * Carrier now on.
+ */
+ tp->t_state |= TS_CARR_ON;
+ wakeup((caddr_t)&tp->t_rawq);
+ }
+ return (1);
+}
+
+/*
+ * Default modem control routine (for other line disciplines).
+ * Return argument flag, to turn off device on carrier drop.
+ */
+nullmodem(tp, flag)
+ register struct tty *tp;
+ int flag;
+{
+
+ if (flag)
+ tp->t_state |= TS_CARR_ON;
+ else
+ tp->t_state &= ~TS_CARR_ON;
+ return (flag);
+}
+
+/*
+ * reinput pending characters after state switch
+ * call at spltty().
+ */
+ttypend(tp)
+ register struct tty *tp;
+{
+ struct clist tq;
+ register c;
+
+ tp->t_flags &= ~PENDIN;
+ tp->t_state |= TS_TYPEN;
+ tq = tp->t_rawq;
+ tp->t_rawq.c_cc = 0;
+ tp->t_rawq.c_cf = tp->t_rawq.c_cl = 0;
+ while ((c = getc(&tq)) >= 0)
+ ttyinput(c, tp);
+ tp->t_state &= ~TS_TYPEN;
+}
+
+/*
+ * Place a character on raw TTY input queue,
+ * putting in delimiters and waking up top
+ * half as needed. Also echo if required.
+ * The arguments are the character and the
+ * appropriate tty structure.
+ */
+ttyinput(c, tp)
+ register c;
+ register struct tty *tp;
+{
+ register int t_flags = tp->t_flags;
+ int i;
+
/*
- * Ioctl entries to line discipline
+ * If input is pending take it first.
*/
- case DIOCSETP:
- case DIOCGETP:
- if ((*linesw[tp->t_line].l_ioctl)(com, tp, addr))
- u.u_error = ENOTTY;
- break;
+ if (t_flags&PENDIN)
+ ttypend(tp);
+ tk_nin++;
+ c &= 0377;
/*
- * Set and fetch special characters
+ * In tandem mode, check high water mark.
*/
- case TIOCSETC:
- if (copyin(addr, (caddr_t)&tun, sizeof(struct tchars)))
- u.u_error = EFAULT;
- break;
+ if (t_flags&TANDEM)
+ ttyblock(tp);
- case TIOCGETC:
- if (copyout((caddr_t)&tun, addr, sizeof(struct tchars)))
- u.u_error = EFAULT;
- break;
+ if (t_flags&RAW) {
+ /*
+ * Raw mode, just put character
+ * in input q w/o interpretation.
+ */
+ if (tp->t_rawq.c_cc > TTYHOG)
+ ttyflush(tp, FREAD|FWRITE);
+ else {
+ if (putc(c, &tp->t_rawq) >= 0)
+ ttwakeup(tp);
+ ttyecho(c, tp);
+ }
+ goto endcase;
+ }
-/* local ioctls */
/*
- * Set/get local special characters.
+ * Ignore any high bit added during
+ * previous ttyinput processing.
*/
- case TIOCSLTC:
- if (copyin(addr, (caddr_t)&tlun, sizeof (struct ltchars)))
- u.u_error = EFAULT;
- break;
+ if ((tp->t_state&TS_TYPEN) == 0 && (t_flags&PASS8) == 0)
+ c &= 0177;
+ /*
+ * Check for literal nexting very first
+ */
+ if (tp->t_state&TS_LNCH) {
+ c |= 0200;
+ tp->t_state &= ~TS_LNCH;
+ }
- case TIOCGLTC:
- if (copyout((caddr_t)&tlun, addr, sizeof (struct ltchars)))
- u.u_error = EFAULT;
- break;
+ /*
+ * Scan for special characters. This code
+ * is really just a big case statement with
+ * non-constant cases. The bottom of the
+ * case statement is labeled ``endcase'', so goto
+ * it after a case match, or similar.
+ */
+ if (tp->t_line == NTTYDISC) {
+ if (c == tp->t_lnextc) {
+ if (t_flags&ECHO)
+ ttyout("^\b", tp);
+ tp->t_state |= TS_LNCH;
+ goto endcase;
+ }
+ if (c == tp->t_flushc) {
+ if (t_flags&FLUSHO)
+ tp->t_flags &= ~FLUSHO;
+ else {
+ ttyflush(tp, FWRITE);
+ ttyecho(c, tp);
+ if (tp->t_rawq.c_cc + tp->t_canq.c_cc)
+ ttyretype(tp);
+ tp->t_flags |= FLUSHO;
+ }
+ goto startoutput;
+ }
+ if (c == tp->t_suspc) {
+ if ((t_flags&NOFLSH) == 0)
+ ttyflush(tp, FREAD);
+ ttyecho(c, tp);
+ gsignal(tp->t_pgrp, SIGTSTP);
+ goto endcase;
+ }
+ }
/*
- * Return number of characters immediately available.
+ * Handle start/stop characters.
*/
- case FIONREAD: {
- off_t nread;
+ if (c == tp->t_stopc) {
+ if ((tp->t_state&TS_TTSTOP) == 0) {
+ tp->t_state |= TS_TTSTOP;
+ (*cdevsw[major(tp->t_dev)].d_stop)(tp, 0);
+ return;
+ }
+ if (c != tp->t_startc)
+ return;
+ goto endcase;
+ }
+ if (c == tp->t_startc)
+ goto restartoutput;
- switch (tp->t_line) {
+ /*
+ * Look for interrupt/quit chars.
+ */
+ if (c == tp->t_intrc || c == tp->t_quitc) {
+ if ((t_flags&NOFLSH) == 0)
+ ttyflush(tp, FREAD|FWRITE);
+ ttyecho(c, tp);
+ gsignal(tp->t_pgrp, c == tp->t_intrc ? SIGINT : SIGQUIT);
+ goto endcase;
+ }
- case NETLDISC:
- nread = tp->t_rec ? tp->t_inbuf : 0;
- break;
+ if (tp->t_flags & LCASE && c <= 0177) {
+ if (tp->t_state&TS_BKSL) {
+ ttyrub(unputc(&tp->t_rawq), tp);
+ if (maptab[c])
+ c = maptab[c];
+ c |= 0200;
+ tp->t_state &= ~(TS_BKSL|TS_QUOT);
+ } else if (c >= 'A' && c <= 'Z')
+ c += 'a' - 'A';
+ else if (c == '\\')
+ tp->t_state |= TS_BKSL;
+ }
+
+ /*
+ * Cbreak mode, don't process line editing
+ * characters; check high water mark for wakeup.
+ */
+ if (t_flags&CBREAK) {
+ if (tp->t_rawq.c_cc > TTYHOG) {
+ if (tp->t_outq.c_cc < TTHIWAT(tp) &&
+ tp->t_line == NTTYDISC)
+ (void) ttyoutput(CTRL('g'), tp);
+ } else if (putc(c, &tp->t_rawq) >= 0) {
+ ttwakeup(tp);
+ ttyecho(c, tp);
+ }
+ goto endcase;
+ }
- case 0:
- (void) spl5();
- while (canon(tp)>=0)
+ /*
+ * From here on down cooked mode character
+ * processing takes place.
+ */
+ if ((tp->t_state&TS_QUOT) &&
+ (c == tp->t_erase || c == tp->t_kill)) {
+ ttyrub(unputc(&tp->t_rawq), tp);
+ c |= 0200;
+ }
+ if (c == tp->t_erase) {
+ if (tp->t_rawq.c_cc)
+ ttyrub(unputc(&tp->t_rawq), tp);
+ goto endcase;
+ }
+ if (c == tp->t_kill) {
+ if (t_flags&CRTKIL &&
+ tp->t_rawq.c_cc == tp->t_rocount) {
+ while (tp->t_rawq.c_cc)
+ ttyrub(unputc(&tp->t_rawq), tp);
+ } else {
+ ttyecho(c, tp);
+ ttyecho('\n', tp);
+ while (getc(&tp->t_rawq) > 0)
;
- (void) spl0();
- /* fall into ... */
+ tp->t_rocount = 0;
+ }
+ tp->t_state &= ~TS_LOCAL;
+ goto endcase;
+ }
- case NTTYDISC:
- nread = tp->t_canq.c_cc;
- if (tp->t_flags & (RAW|CBREAK))
- nread += tp->t_rawq.c_cc;
- break;
+ /*
+ * New line discipline,
+ * check word erase/reprint line.
+ */
+ if (tp->t_line == NTTYDISC) {
+ if (c == tp->t_werasc) {
+ if (tp->t_rawq.c_cc == 0)
+ goto endcase;
+ do {
+ c = unputc(&tp->t_rawq);
+ if (c != ' ' && c != '\t')
+ goto erasenb;
+ ttyrub(c, tp);
+ } while (tp->t_rawq.c_cc);
+ goto endcase;
+ erasenb:
+ do {
+ ttyrub(c, tp);
+ if (tp->t_rawq.c_cc == 0)
+ goto endcase;
+ c = unputc(&tp->t_rawq);
+ } while (c != ' ' && c != '\t');
+ (void) putc(c, &tp->t_rawq);
+ goto endcase;
+ }
+ if (c == tp->t_rprntc) {
+ ttyretype(tp);
+ goto endcase;
+ }
+ }
+
+ /*
+ * Check for input buffer overflow
+ */
+ if (tp->t_rawq.c_cc+tp->t_canq.c_cc >= TTYHOG) {
+ if (tp->t_line == NTTYDISC)
+ (void) ttyoutput(CTRL('g'), tp);
+ goto endcase;
+ }
+ /*
+ * Put data char in q for user and
+ * wakeup on seeing a line delimiter.
+ */
+ if (putc(c, &tp->t_rawq) >= 0) {
+ if (ttbreakc(c, tp)) {
+ tp->t_rocount = 0;
+ catq(&tp->t_rawq, &tp->t_canq);
+ ttwakeup(tp);
+ } else if (tp->t_rocount++ == 0)
+ tp->t_rocol = tp->t_col;
+ tp->t_state &= ~TS_QUOT;
+ if (c == '\\')
+ tp->t_state |= TS_QUOT;
+ if (tp->t_state&TS_ERASE) {
+ tp->t_state &= ~TS_ERASE;
+ (void) ttyoutput('/', tp);
}
- if (copyout((caddr_t)&nread, addr, sizeof (off_t)))
- u.u_error = EFAULT;
- break;
+ i = tp->t_col;
+ ttyecho(c, tp);
+ if (c == tp->t_eofc && t_flags&ECHO) {
+ i = MIN(2, tp->t_col - i);
+ while (i > 0) {
+ (void) ttyoutput('\b', tp);
+ i--;
+ }
}
+ }
+endcase:
+ /*
+ * If DEC-style start/stop is enabled don't restart
+ * output until seeing the start character.
+ */
+ if (t_flags&DECCTQ && tp->t_state&TS_TTSTOP &&
+ tp->t_startc != tp->t_stopc)
+ return;
+restartoutput:
+ tp->t_state &= ~TS_TTSTOP;
+ tp->t_flags &= ~FLUSHO;
+startoutput:
+ ttstart(tp);
+}
+
+/*
+ * Put character on TTY output queue, adding delays,
+ * expanding tabs, and handling the CR/NL bit.
+ * This is called both from the top half for output,
+ * and from interrupt level for echoing.
+ * The arguments are the character and the tty structure.
+ * Returns < 0 if putc succeeds, otherwise returns char to resend
+ * Must be recursive.
+ */
+ttyoutput(c, tp)
+ register c;
+ register struct tty *tp;
+{
+ register char *colp;
+ register ctype;
+
+ if (tp->t_flags & (RAW|LITOUT)) {
+ if (tp->t_flags&FLUSHO)
+ return (-1);
+ if (putc(c, &tp->t_outq))
+ return (c);
+ tk_nout++;
+ return (-1);
+ }
/*
- * Should allow SPGRP and GPGRP only if tty open for reading.
+ * Ignore EOT in normal mode to avoid
+ * hanging up certain terminals.
*/
- case TIOCSPGRP:
- if (copyin(addr, (caddr_t)&tp->t_pgrp, sizeof (tp->t_pgrp)))
- u.u_error = EFAULT;
+ c &= 0177;
+ if (c == CEOT && (tp->t_flags&CBREAK) == 0)
+ return (-1);
+ /*
+ * Turn tabs to spaces as required
+ */
+ if (c == '\t' && (tp->t_flags&TBDELAY) == XTABS) {
+ register int s;
+
+ c = 8 - (tp->t_col&7);
+ if ((tp->t_flags&FLUSHO) == 0) {
+ s = spltty(); /* don't interrupt tabs */
+ c -= b_to_q(" ", c, &tp->t_outq);
+ tk_nout += c;
+ splx(s);
+ }
+ tp->t_col += c;
+ return (c ? -1 : '\t');
+ }
+ tk_nout++;
+ /*
+ * for upper-case-only terminals,
+ * generate escapes.
+ */
+ if (tp->t_flags&LCASE) {
+ colp = "({)}!|^~'`";
+ while (*colp++)
+ if (c == *colp++) {
+ if (ttyoutput('\\', tp) >= 0)
+ return (c);
+ c = colp[-2];
+ break;
+ }
+ if ('A' <= c && c <= 'Z') {
+ if (ttyoutput('\\', tp) >= 0)
+ return (c);
+ } else if ('a' <= c && c <= 'z')
+ c += 'A' - 'a';
+ }
+
+ /*
+ * turn <nl> to <cr><lf> if desired.
+ */
+ if (c == '\n' && tp->t_flags&CRMOD)
+ if (ttyoutput('\r', tp) >= 0)
+ return (c);
+ if (c == '~' && tp->t_flags&TILDE)
+ c = '`';
+ if ((tp->t_flags&FLUSHO) == 0 && putc(c, &tp->t_outq))
+ return (c);
+ /*
+ * Calculate delays.
+ * The numbers here represent clock ticks
+ * and are not necessarily optimal for all terminals.
+ * The delays are indicated by characters above 0200.
+ * In raw mode there are no delays and the
+ * transmission path is 8 bits wide.
+ *
+ * SHOULD JUST ALLOW USER TO SPECIFY DELAYS
+ */
+ colp = &tp->t_col;
+ ctype = partab[c];
+ c = 0;
+ switch (ctype&077) {
+
+ case ORDINARY:
+ (*colp)++;
+
+ case CONTROL:
break;
- case TIOCGPGRP:
- if (copyout((caddr_t)&tp->t_pgrp, addr, sizeof(tp->t_pgrp)))
- u.u_error = EFAULT;
+ case BACKSPACE:
+ if (*colp)
+ (*colp)--;
break;
/*
- * Modify local mode word.
+ * This macro is close enough to the correct thing;
+ * it should be replaced by real user settable delays
+ * in any event...
*/
- case TIOCLBIS:
- if (copyin(addr, (caddr_t)&temp, sizeof (tp->t_local)))
- u.u_error = EFAULT;
- else
- tp->t_local |= temp;
+#define mstohz(ms) (((ms) * hz) >> 10)
+ case NEWLINE:
+ ctype = (tp->t_flags >> 8) & 03;
+ if (ctype == 1) { /* tty 37 */
+ if (*colp > 0) {
+ c = (((unsigned)*colp) >> 4) + 3;
+ if ((unsigned)c > 6)
+ c = 6;
+ }
+ } else if (ctype == 2) /* vt05 */
+ c = mstohz(100);
+ *colp = 0;
break;
- case TIOCLBIC:
- if (copyin(addr, (caddr_t)&temp, sizeof (tp->t_local)))
- u.u_error = EFAULT;
- else
- tp->t_local &= ~temp;
+ case TAB:
+ ctype = (tp->t_flags >> 10) & 03;
+ if (ctype == 1) { /* tty 37 */
+ c = 1 - (*colp | ~07);
+ if (c < 5)
+ c = 0;
+ }
+ *colp |= 07;
+ (*colp)++;
break;
- case TIOCLSET:
- if (copyin(addr, (caddr_t)&temp, sizeof (tp->t_local)))
- u.u_error = EFAULT;
- else
- tp->t_local = temp;
+ case VTAB:
+ if (tp->t_flags&VTDELAY) /* tty 37 */
+ c = 0177;
break;
- case TIOCLGET:
- if (copyout((caddr_t)&tp->t_local, addr, sizeof(tp->t_local)))
- u.u_error = EFAULT;
- break;
+ case RETURN:
+ ctype = (tp->t_flags >> 12) & 03;
+ if (ctype == 1) /* tn 300 */
+ c = mstohz(83);
+ else if (ctype == 2) /* ti 700 */
+ c = mstohz(166);
+ else if (ctype == 3) { /* concept 100 */
+ int i;
+ if ((i = *colp) >= 0)
+ for (; i < 9; i++)
+ (void) putc(0177, &tp->t_outq);
+ }
+ *colp = 0;
+ }
+ if (c && (tp->t_flags&FLUSHO) == 0)
+ (void) putc(c|0200, &tp->t_outq);
+ return (-1);
+}
+#undef mstohz
+
+/*
+ * Called from device's read routine after it has
+ * calculated the tty-structure given as argument.
+ */
+ttread(tp, uio)
+ register struct tty *tp;
+ struct uio *uio;
+{
+ register struct clist *qp;
+ register c, t_flags;
+ int s, first, error = 0;
+
+loop:
/*
- * Return number of characters in
- * the output.
+ * Take any pending input first.
*/
- case TIOCOUTQ:
- if (copyout((caddr_t)&tp->t_outq.c_cc, addr, sizeof(tp->t_outq.c_cc)))
- u.u_error = EFAULT;
- break;
+ s = spltty();
+ if (tp->t_flags&PENDIN)
+ ttypend(tp);
+ splx(s);
+
+ if ((tp->t_state&TS_CARR_ON)==0)
+ return (EIO);
/*
- * Simulate typing of a character at the terminal.
+ * Hang process if it's in the background.
*/
- case TIOCSTI:
- c = fubyte(addr);
- if (u.u_uid && u.u_ttyp != tp || c < 0)
- u.u_error = EFAULT;
- else
- (*linesw[tp->t_line].l_rint)(c, tp);
- break;
-/* end of locals */
+ if (tp == u.u_ttyp && u.u_procp->p_pgrp != tp->t_pgrp) {
+ if ((u.u_procp->p_sigignore & sigmask(SIGTTIN)) ||
+ (u.u_procp->p_sigmask & sigmask(SIGTTIN)) ||
+ u.u_procp->p_flag&SVFORK)
+ return (EIO);
+ gsignal(u.u_procp->p_pgrp, SIGTTIN);
+ sleep((caddr_t)&lbolt, TTIPRI);
+ goto loop;
+ }
+ t_flags = tp->t_flags;
- default:
- return(0);
+ /*
+ * In raw mode take characters directly from the
+ * raw queue w/o processing. Interlock against
+ * device interrupts when interrogating rawq.
+ */
+ if (t_flags&RAW) {
+ s = spltty();
+ if (tp->t_rawq.c_cc <= 0) {
+ if ((tp->t_state&TS_CARR_ON) == 0 ||
+ (tp->t_state&TS_NBIO)) {
+ splx(s);
+ return (EWOULDBLOCK);
+ }
+ sleep((caddr_t)&tp->t_rawq, TTIPRI);
+ splx(s);
+ goto loop;
+ }
+ splx(s);
+ while (!error && tp->t_rawq.c_cc && uio->uio_resid)
+ error = ureadc(getc(&tp->t_rawq), uio);
+ goto checktandem;
+ }
+
+ /*
+ * In cbreak mode use the rawq, otherwise
+ * take characters from the canonicalized q.
+ */
+ qp = t_flags&CBREAK ? &tp->t_rawq : &tp->t_canq;
+
+ /*
+ * No input, sleep on rawq awaiting hardware
+ * receipt and notification.
+ */
+ s = spltty();
+ if (qp->c_cc <= 0) {
+ if ((tp->t_state&TS_CARR_ON) == 0 ||
+ (tp->t_state&TS_NBIO)) {
+ splx(s);
+ return (EWOULDBLOCK);
+ }
+ sleep((caddr_t)&tp->t_rawq, TTIPRI);
+ splx(s);
+ goto loop;
+ }
+ splx(s);
+
+ /*
+ * Input present, perform input mapping
+ * and processing (we're not in raw mode).
+ */
+ first = 1;
+ while ((c = getc(qp)) >= 0) {
+ if (t_flags&CRMOD && c == '\r')
+ c = '\n';
+ /*
+ * Check for delayed suspend character.
+ */
+ if (tp->t_line == NTTYDISC && c == tp->t_dsuspc) {
+ gsignal(tp->t_pgrp, SIGTSTP);
+ if (first) {
+ sleep((caddr_t)&lbolt, TTIPRI);
+ goto loop;
+ }
+ break;
+ }
+ /*
+ * Interpret EOF only in cooked mode.
+ */
+ if (c == tp->t_eofc && (t_flags&CBREAK) == 0)
+ break;
+ /*
+ * Give user character.
+ */
+ error = ureadc(t_flags&PASS8 ? c : c & 0177, uio);
+ if (error)
+ break;
+ if (uio->uio_resid == 0)
+ break;
+ /*
+ * In cooked mode check for a "break character"
+ * marking the end of a "line of input".
+ */
+ if ((t_flags&CBREAK) == 0 && ttbreakc(c, tp))
+ break;
+ first = 0;
+ }
+
+checktandem:
+ /*
+ * Look to unblock output now that (presumably)
+ * the input queue has gone down.
+ */
+ if (tp->t_state&TS_TBLOCK && tp->t_rawq.c_cc < TTYHOG/5)
+ if (putc(tp->t_startc, &tp->t_outq) == 0) {
+ tp->t_state &= ~TS_TBLOCK;
+ ttstart(tp);
+ }
+ return (error);
+}
+
+/*
+ * Check the output queue on tp for space for a kernel message
+ * (from uprintf/tprintf). Allow some space over the normal
+ * hiwater mark so we don't lose messages due to normal flow
+ * control, but don't let the tty run amok.
+ * Sleeps here are not interruptible, but we return prematurely
+ * if new signals come in.
+ */
+ttycheckoutq(tp, wait)
+ register struct tty *tp;
+ int wait;
+{
+ int hiwat, s, oldsig;
+
+ hiwat = TTHIWAT(tp);
+ s = spltty();
+ oldsig = u.u_procp->p_sig;
+ if (tp->t_outq.c_cc > hiwat + 200)
+ while (tp->t_outq.c_cc > hiwat) {
+ ttstart(tp);
+ if (wait == 0 || u.u_procp->p_sig != oldsig) {
+ splx(s);
+ return (0);
+ }
+ timeout(wakeup, (caddr_t)&tp->t_outq, hz);
+ tp->t_state |= TS_ASLEEP;
+ sleep((caddr_t)&tp->t_outq, PZERO - 1);
+ }
+ splx(s);
+ return (1);
+}
+
+/*
+ * Called from the device's write routine after it has
+ * calculated the tty-structure given as argument.
+ */
+ttwrite(tp, uio)
+ register struct tty *tp;
+ register struct uio *uio;
+{
+ register char *cp;
+ register int cc, ce, c;
+ int i, hiwat, cnt, error, s;
+ char obuf[OBUFSIZ];
+
+ hiwat = TTHIWAT(tp);
+ cnt = uio->uio_resid;
+ error = 0;
+loop:
+ if ((tp->t_state&TS_CARR_ON) == 0)
+ return (EIO);
+ /*
+ * Hang the process if it's in the background.
+ */
+ if (u.u_procp->p_pgrp != tp->t_pgrp && tp == u.u_ttyp &&
+ (tp->t_flags&TOSTOP) && (u.u_procp->p_flag&SVFORK)==0 &&
+ !(u.u_procp->p_sigignore & sigmask(SIGTTOU)) &&
+ !(u.u_procp->p_sigmask & sigmask(SIGTTOU))) {
+ gsignal(u.u_procp->p_pgrp, SIGTTOU);
+ sleep((caddr_t)&lbolt, TTIPRI);
+ goto loop;
+ }
+
+ /*
+ * Process the user's data in at most OBUFSIZ
+ * chunks. Perform lower case simulation and
+ * similar hacks. Keep track of high water
+ * mark, sleep on overflow awaiting device aid
+ * in acquiring new space.
+ */
+ while (uio->uio_resid > 0) {
+ if (tp->t_outq.c_cc > hiwat) {
+ cc = 0;
+ goto ovhiwat;
+ }
+ /*
+ * Grab a hunk of data from the user.
+ */
+ cc = uio->uio_iov->iov_len;
+ if (cc == 0) {
+ uio->uio_iovcnt--;
+ uio->uio_iov++;
+ if (uio->uio_iovcnt <= 0)
+ panic("ttwrite");
+ continue;
+ }
+ if (cc > OBUFSIZ)
+ cc = OBUFSIZ;
+ cp = obuf;
+ error = uiomove(cp, cc, UIO_WRITE, uio);
+ if (error)
+ break;
+ if (tp->t_flags&FLUSHO)
+ continue;
+ /*
+ * If we're mapping lower case or kludging tildes,
+ * then we've got to look at each character, so
+ * just feed the stuff to ttyoutput...
+ */
+ if (tp->t_flags & (LCASE|TILDE)) {
+ while (cc > 0) {
+ c = *cp++;
+ tp->t_rocount = 0;
+ while ((c = ttyoutput(c, tp)) >= 0) {
+ /* out of clists, wait a bit */
+ ttstart(tp);
+ sleep((caddr_t)&lbolt, TTOPRI);
+ tp->t_rocount = 0;
+ if (cc != 0) {
+ uio->uio_iov->iov_base -= cc;
+ uio->uio_iov->iov_len += cc;
+ uio->uio_resid += cc;
+ uio->uio_offset -= cc;
+ }
+ goto loop;
+ }
+ --cc;
+ if (tp->t_outq.c_cc > hiwat)
+ goto ovhiwat;
+ }
+ continue;
+ }
+ /*
+ * If nothing fancy need be done, grab those characters we
+ * can handle without any of ttyoutput's processing and
+ * just transfer them to the output q. For those chars
+ * which require special processing (as indicated by the
+ * bits in partab), call ttyoutput. After processing
+ * a hunk of data, look for FLUSHO so ^O's will take effect
+ * immediately.
+ */
+ while (cc > 0) {
+ if (tp->t_flags & (RAW|LITOUT))
+ ce = cc;
+ else {
+ ce = cc - scanc((unsigned)cc, (caddr_t)cp,
+ (caddr_t)partab, 077);
+ /*
+ * If ce is zero, then we're processing
+ * a special character through ttyoutput.
+ */
+ if (ce == 0) {
+ tp->t_rocount = 0;
+ if (ttyoutput(*cp, tp) >= 0) {
+ /* no c-lists, wait a bit */
+ ttstart(tp);
+ sleep((caddr_t)&lbolt, TTOPRI);
+ if (cc != 0) {
+ uio->uio_iov->iov_base -= cc;
+ uio->uio_iov->iov_len += cc;
+ uio->uio_resid += cc;
+ uio->uio_offset -= cc;
+ }
+ goto loop;
+ }
+ cp++, cc--;
+ if (tp->t_flags&FLUSHO ||
+ tp->t_outq.c_cc > hiwat)
+ goto ovhiwat;
+ continue;
+ }
+ }
+ /*
+ * A bunch of normal characters have been found,
+ * transfer them en masse to the output queue and
+ * continue processing at the top of the loop.
+ * If there are any further characters in this
+ * <= OBUFSIZ chunk, the first should be a character
+ * requiring special handling by ttyoutput.
+ */
+ tp->t_rocount = 0;
+ i = b_to_q(cp, ce, &tp->t_outq);
+ ce -= i;
+ tp->t_col += ce;
+ cp += ce, cc -= ce, tk_nout += ce;
+ if (i > 0) {
+ /* out of c-lists, wait a bit */
+ ttstart(tp);
+ sleep((caddr_t)&lbolt, TTOPRI);
+ uio->uio_iov->iov_base -= cc;
+ uio->uio_iov->iov_len += cc;
+ uio->uio_resid += cc;
+ uio->uio_offset -= cc;
+ goto loop;
+ }
+ if (tp->t_flags&FLUSHO || tp->t_outq.c_cc > hiwat)
+ goto ovhiwat;
+ }
+ }
+ ttstart(tp);
+ return (error);
+
+ovhiwat:
+ if (cc != 0) {
+ uio->uio_iov->iov_base -= cc;
+ uio->uio_iov->iov_len += cc;
+ uio->uio_resid += cc;
+ uio->uio_offset -= cc;
+ }
+ ttstart(tp);
+ s = spltty();
+ /*
+ * This can only occur if FLUSHO is set in t_flags,
+ * or if ttstart/oproc is synchronous (or very fast).
+ */
+ if (tp->t_outq.c_cc <= hiwat) {
+ splx(s);
+ goto loop;
+ }
+ if (tp->t_state&TS_NBIO) {
+ splx(s);
+ if (uio->uio_resid == cnt)
+ return (EWOULDBLOCK);
+ return (0);
+ }
+ tp->t_state |= TS_ASLEEP;
+ sleep((caddr_t)&tp->t_outq, TTOPRI);
+ splx(s);
+ goto loop;
+}
+
+/*
+ * Rubout one character from the rawq of tp
+ * as cleanly as possible.
+ */
+ttyrub(c, tp)
+ register c;
+ register struct tty *tp;
+{
+ register char *cp;
+ register int savecol;
+ int s;
+ char *nextc();
+
+ if ((tp->t_flags&ECHO) == 0)
+ return;
+ tp->t_flags &= ~FLUSHO;
+ c &= 0377;
+ if (tp->t_flags&CRTBS) {
+ if (tp->t_rocount == 0) {
+ /*
+ * Screwed by ttwrite; retype
+ */
+ ttyretype(tp);
+ return;
+ }
+ if (c == ('\t'|0200) || c == ('\n'|0200))
+ ttyrubo(tp, 2);
+ else switch (partab[c&=0177]&0177) {
+
+ case ORDINARY:
+ if (tp->t_flags&LCASE && c >= 'A' && c <= 'Z')
+ ttyrubo(tp, 2);
+ else
+ ttyrubo(tp, 1);
+ break;
+
+ case VTAB:
+ case BACKSPACE:
+ case CONTROL:
+ case RETURN:
+ if (tp->t_flags&CTLECH)
+ ttyrubo(tp, 2);
+ break;
+
+ case TAB:
+ if (tp->t_rocount < tp->t_rawq.c_cc) {
+ ttyretype(tp);
+ return;
+ }
+ s = spltty();
+ savecol = tp->t_col;
+ tp->t_state |= TS_CNTTB;
+ tp->t_flags |= FLUSHO;
+ tp->t_col = tp->t_rocol;
+ cp = tp->t_rawq.c_cf;
+ for (; cp; cp = nextc(&tp->t_rawq, cp))
+ ttyecho(*cp, tp);
+ tp->t_flags &= ~FLUSHO;
+ tp->t_state &= ~TS_CNTTB;
+ splx(s);
+ /*
+ * savecol will now be length of the tab
+ */
+ savecol -= tp->t_col;
+ tp->t_col += savecol;
+ if (savecol > 8)
+ savecol = 8; /* overflow screw */
+ while (--savecol >= 0)
+ (void) ttyoutput('\b', tp);
+ break;
+
+ default:
+ panic("ttyrub");
+ }
+ } else if (tp->t_flags&PRTERA) {
+ if ((tp->t_state&TS_ERASE) == 0) {
+ (void) ttyoutput('\\', tp);
+ tp->t_state |= TS_ERASE;
+ }
+ ttyecho(c, tp);
+ } else
+ ttyecho(tp->t_erase, tp);
+ tp->t_rocount--;
+}
+
+/*
+ * Crt back over cnt chars perhaps
+ * erasing them.
+ */
+ttyrubo(tp, cnt)
+ register struct tty *tp;
+ int cnt;
+{
+ register char *rubostring = tp->t_flags&CRTERA ? "\b \b" : "\b";
+
+ while (--cnt >= 0)
+ ttyout(rubostring, tp);
+}
+
+/*
+ * Reprint the rawq line.
+ * We assume c_cc has already been checked.
+ */
+ttyretype(tp)
+ register struct tty *tp;
+{
+ register char *cp;
+ char *nextc();
+ int s;
+
+ if (tp->t_rprntc != 0377)
+ ttyecho(tp->t_rprntc, tp);
+ (void) ttyoutput('\n', tp);
+ s = spltty();
+ for (cp = tp->t_canq.c_cf; cp; cp = nextc(&tp->t_canq, cp))
+ ttyecho(*cp, tp);
+ for (cp = tp->t_rawq.c_cf; cp; cp = nextc(&tp->t_rawq, cp))
+ ttyecho(*cp, tp);
+ tp->t_state &= ~TS_ERASE;
+ splx(s);
+ tp->t_rocount = tp->t_rawq.c_cc;
+ tp->t_rocol = 0;
+}
+
+/*
+ * Echo a typed character to the terminal
+ */
+ttyecho(c, tp)
+ register c;
+ register struct tty *tp;
+{
+
+ if ((tp->t_state&TS_CNTTB) == 0)
+ tp->t_flags &= ~FLUSHO;
+ if ((tp->t_flags&ECHO) == 0)
+ return;
+ c &= 0377;
+ if (tp->t_flags&RAW) {
+ (void) ttyoutput(c, tp);
+ return;
+ }
+ if (c == '\r' && tp->t_flags&CRMOD)
+ c = '\n';
+ if (tp->t_flags&CTLECH) {
+ if ((c&0177) <= 037 && c!='\t' && c!='\n' || (c&0177)==0177) {
+ (void) ttyoutput('^', tp);
+ c &= 0177;
+ if (c == 0177)
+ c = '?';
+ else if (tp->t_flags&LCASE)
+ c += 'a' - 1;
+ else
+ c += 'A' - 1;
+ }
+ }
+ (void) ttyoutput(c&0177, tp);
+}
+
+/*
+ * Is c a break char for tp?
+ */
+ttbreakc(c, tp)
+ register c;
+ register struct tty *tp;
+{
+ return (c == '\n' || c == tp->t_eofc || c == tp->t_brkc ||
+ c == '\r' && (tp->t_flags&CRMOD));
+}
+
+/*
+ * send string cp to tp
+ */
+ttyout(cp, tp)
+ register char *cp;
+ register struct tty *tp;
+{
+ register char c;
+
+ while (c = *cp++)
+ (void) ttyoutput(c, tp);
+}
+
+ttwakeup(tp)
+ struct tty *tp;
+{
+
+ if (tp->t_rsel) {
+ selwakeup(tp->t_rsel, tp->t_state&TS_RCOLL);
+ tp->t_state &= ~TS_RCOLL;
+ tp->t_rsel = 0;
}
- return(1);
+ if (tp->t_state & TS_ASYNC)
+ gsignal(tp->t_pgrp, SIGIO);
+ wakeup((caddr_t)&tp->t_rawq);
}