pty.c revision 9824
11541Srgrimes/* 21541Srgrimes * Copyright (c) 1982, 1986, 1989, 1993 31541Srgrimes * The Regents of the University of California. All rights reserved. 41541Srgrimes * 51541Srgrimes * Redistribution and use in source and binary forms, with or without 61541Srgrimes * modification, are permitted provided that the following conditions 71541Srgrimes * are met: 81541Srgrimes * 1. Redistributions of source code must retain the above copyright 91541Srgrimes * notice, this list of conditions and the following disclaimer. 101541Srgrimes * 2. Redistributions in binary form must reproduce the above copyright 111541Srgrimes * notice, this list of conditions and the following disclaimer in the 121541Srgrimes * documentation and/or other materials provided with the distribution. 131541Srgrimes * 3. All advertising materials mentioning features or use of this software 141541Srgrimes * must display the following acknowledgement: 151541Srgrimes * This product includes software developed by the University of 161541Srgrimes * California, Berkeley and its contributors. 171541Srgrimes * 4. Neither the name of the University nor the names of its contributors 181541Srgrimes * may be used to endorse or promote products derived from this software 191541Srgrimes * without specific prior written permission. 201541Srgrimes * 211541Srgrimes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 221541Srgrimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 231541Srgrimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 241541Srgrimes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 251541Srgrimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 261541Srgrimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 271541Srgrimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 281541Srgrimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 291541Srgrimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 301541Srgrimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 311541Srgrimes * SUCH DAMAGE. 321541Srgrimes * 331541Srgrimes * @(#)tty_pty.c 8.2 (Berkeley) 9/23/93 349824Sbde * $Id: tty_pty.c,v 1.15 1995/07/22 16:45:08 bde Exp $ 351541Srgrimes */ 361541Srgrimes 371541Srgrimes/* 381541Srgrimes * Pseudo-teletype Driver 391541Srgrimes * (Actually two drivers, requiring two entries in 'cdevsw') 401541Srgrimes */ 411541Srgrimes#include "pty.h" /* XXX */ 421541Srgrimes 431541Srgrimes#include <sys/param.h> 441541Srgrimes#include <sys/systm.h> 451541Srgrimes#include <sys/ioctl.h> 461541Srgrimes#include <sys/proc.h> 471541Srgrimes#include <sys/tty.h> 481541Srgrimes#include <sys/conf.h> 491541Srgrimes#include <sys/file.h> 501541Srgrimes#include <sys/uio.h> 511541Srgrimes#include <sys/kernel.h> 521541Srgrimes#include <sys/vnode.h> 533308Sphk#include <sys/signalvar.h> 541541Srgrimes 551541Srgrimes#if NPTY == 1 561541Srgrimes#undef NPTY 571541Srgrimes#define NPTY 32 /* crude XXX */ 581541Srgrimes#endif 591541Srgrimes 601541Srgrimes#define BUFSIZ 100 /* Chunk size iomoved to/from user */ 611541Srgrimes 621541Srgrimes/* 631541Srgrimes * pts == /dev/tty[pqrs]? 641541Srgrimes * ptc == /dev/pty[pqrs]? 651541Srgrimes */ 661541Srgrimesstruct tty pt_tty[NPTY]; /* XXX */ 671541Srgrimesstruct pt_ioctl { 681541Srgrimes int pt_flags; 691541Srgrimes struct selinfo pt_selr, pt_selw; 701541Srgrimes u_char pt_send; 711541Srgrimes u_char pt_ucntl; 721541Srgrimes} pt_ioctl[NPTY]; /* XXX */ 731541Srgrimesint npty = NPTY; /* for pstat -t */ 741541Srgrimes 751541Srgrimes#define PF_PKT 0x08 /* packet mode */ 761541Srgrimes#define PF_STOPPED 0x10 /* user told stopped */ 771541Srgrimes#define PF_REMOTE 0x20 /* remote and flow controlled input */ 781541Srgrimes#define PF_NOSTOP 0x40 791541Srgrimes#define PF_UCNTL 0x80 /* user control mode */ 801541Srgrimes 811549Srgrimesvoid ptsstop __P((struct tty *, int)); 821549Srgrimesvoid ptcwakeup __P((struct tty *, int)); 831541Srgrimes 841541Srgrimes/* 851541Srgrimes * Establish n (or default if n is 1) ptys in the system. 861541Srgrimes * 871541Srgrimes * XXX cdevsw & pstat require the array `pty[]' to be an array 881541Srgrimes */ 891541Srgrimesvoid 901541Srgrimesptyattach(n) 911541Srgrimes int n; 921541Srgrimes{ 931541Srgrimes#ifdef notyet 941541Srgrimes char *mem; 951541Srgrimes register u_long ntb; 961541Srgrimes#define DEFAULT_NPTY 32 971541Srgrimes 981541Srgrimes /* maybe should allow 0 => none? */ 991541Srgrimes if (n <= 1) 1001541Srgrimes n = DEFAULT_NPTY; 1011541Srgrimes ntb = n * sizeof(struct tty); 1021541Srgrimes mem = malloc(ntb + ALIGNBYTES + n * sizeof(struct pt_ioctl), 1031541Srgrimes M_DEVBUF, M_WAITOK); 1041541Srgrimes pt_tty = (struct tty *)mem; 1051541Srgrimes mem = (char *)ALIGN(mem + ntb); 1061541Srgrimes pt_ioctl = (struct pt_ioctl *)mem; 1071541Srgrimes npty = n; 1081541Srgrimes#endif 1091541Srgrimes} 1101541Srgrimes 1111541Srgrimes/*ARGSUSED*/ 1121549Srgrimesint 1131541Srgrimesptsopen(dev, flag, devtype, p) 1141541Srgrimes dev_t dev; 1151541Srgrimes int flag, devtype; 1161541Srgrimes struct proc *p; 1171541Srgrimes{ 1181541Srgrimes register struct tty *tp; 1191541Srgrimes int error; 1201541Srgrimes 1211541Srgrimes if (minor(dev) >= npty) 1221541Srgrimes return (ENXIO); 1231541Srgrimes tp = &pt_tty[minor(dev)]; 1241541Srgrimes if ((tp->t_state & TS_ISOPEN) == 0) { 1251541Srgrimes ttychars(tp); /* Set up default chars */ 1261541Srgrimes tp->t_iflag = TTYDEF_IFLAG; 1271541Srgrimes tp->t_oflag = TTYDEF_OFLAG; 1281541Srgrimes tp->t_lflag = TTYDEF_LFLAG; 1291541Srgrimes tp->t_cflag = TTYDEF_CFLAG; 1301541Srgrimes tp->t_ispeed = tp->t_ospeed = TTYDEF_SPEED; 1311541Srgrimes ttsetwater(tp); /* would be done in xxparam() */ 1321541Srgrimes } else if (tp->t_state&TS_XCLUDE && p->p_ucred->cr_uid != 0) 1331541Srgrimes return (EBUSY); 1341541Srgrimes if (tp->t_oproc) /* Ctrlr still around. */ 1359824Sbde (void)(*linesw[tp->t_line].l_modem)(tp, 1); 1361541Srgrimes while ((tp->t_state & TS_CARR_ON) == 0) { 1371541Srgrimes if (flag&FNONBLOCK) 1381541Srgrimes break; 1399639Sbde error = ttysleep(tp, TSA_CARR_ON(tp), TTIPRI | PCATCH, 1409624Sbde "ptsopn", 0); 1413308Sphk if (error) 1421541Srgrimes return (error); 1431541Srgrimes } 1441541Srgrimes error = (*linesw[tp->t_line].l_open)(dev, tp); 1457724Sache if (error == 0) 1467724Sache ptcwakeup(tp, FREAD|FWRITE); 1471541Srgrimes return (error); 1481541Srgrimes} 1491541Srgrimes 1501549Srgrimesint 1511541Srgrimesptsclose(dev, flag, mode, p) 1521541Srgrimes dev_t dev; 1531541Srgrimes int flag, mode; 1541541Srgrimes struct proc *p; 1551541Srgrimes{ 1561541Srgrimes register struct tty *tp; 1571541Srgrimes int err; 1581541Srgrimes 1591541Srgrimes tp = &pt_tty[minor(dev)]; 1601541Srgrimes err = (*linesw[tp->t_line].l_close)(tp, flag); 1617730Sache ptsstop(tp, FREAD|FWRITE); 1627724Sache (void) ttyclose(tp); 1631541Srgrimes return (err); 1641541Srgrimes} 1651541Srgrimes 1661549Srgrimesint 1671541Srgrimesptsread(dev, uio, flag) 1681541Srgrimes dev_t dev; 1691541Srgrimes struct uio *uio; 1701541Srgrimes int flag; 1711541Srgrimes{ 1721541Srgrimes struct proc *p = curproc; 1731541Srgrimes register struct tty *tp = &pt_tty[minor(dev)]; 1741541Srgrimes register struct pt_ioctl *pti = &pt_ioctl[minor(dev)]; 1751541Srgrimes int error = 0; 1761541Srgrimes 1771541Srgrimesagain: 1781541Srgrimes if (pti->pt_flags & PF_REMOTE) { 1791541Srgrimes while (isbackground(p, tp)) { 1801541Srgrimes if ((p->p_sigignore & sigmask(SIGTTIN)) || 1811541Srgrimes (p->p_sigmask & sigmask(SIGTTIN)) || 1821541Srgrimes p->p_pgrp->pg_jobc == 0 || 1831541Srgrimes p->p_flag & P_PPWAIT) 1841541Srgrimes return (EIO); 1851541Srgrimes pgsignal(p->p_pgrp, SIGTTIN, 1); 1869624Sbde error = ttysleep(tp, &lbolt, TTIPRI | PCATCH, "ptsbg", 1879624Sbde 0); 1883308Sphk if (error) 1891541Srgrimes return (error); 1901541Srgrimes } 1911541Srgrimes if (tp->t_canq.c_cc == 0) { 1921541Srgrimes if (flag & IO_NDELAY) 1931541Srgrimes return (EWOULDBLOCK); 1949639Sbde error = ttysleep(tp, TSA_PTS_READ(tp), TTIPRI | PCATCH, 1959624Sbde "ptsin", 0); 1963308Sphk if (error) 1971541Srgrimes return (error); 1981541Srgrimes goto again; 1991541Srgrimes } 2001541Srgrimes while (tp->t_canq.c_cc > 1 && uio->uio_resid > 0) 2011541Srgrimes if (ureadc(getc(&tp->t_canq), uio) < 0) { 2021541Srgrimes error = EFAULT; 2031541Srgrimes break; 2041541Srgrimes } 2051541Srgrimes if (tp->t_canq.c_cc == 1) 2061541Srgrimes (void) getc(&tp->t_canq); 2071541Srgrimes if (tp->t_canq.c_cc) 2081541Srgrimes return (error); 2091541Srgrimes } else 2101541Srgrimes if (tp->t_oproc) 2111541Srgrimes error = (*linesw[tp->t_line].l_read)(tp, uio, flag); 2121541Srgrimes ptcwakeup(tp, FWRITE); 2131541Srgrimes return (error); 2141541Srgrimes} 2151541Srgrimes 2161541Srgrimes/* 2171541Srgrimes * Write to pseudo-tty. 2181541Srgrimes * Wakeups of controlling tty will happen 2191541Srgrimes * indirectly, when tty driver calls ptsstart. 2201541Srgrimes */ 2211549Srgrimesint 2221541Srgrimesptswrite(dev, uio, flag) 2231541Srgrimes dev_t dev; 2241541Srgrimes struct uio *uio; 2251541Srgrimes int flag; 2261541Srgrimes{ 2271541Srgrimes register struct tty *tp; 2281541Srgrimes 2291541Srgrimes tp = &pt_tty[minor(dev)]; 2301541Srgrimes if (tp->t_oproc == 0) 2311541Srgrimes return (EIO); 2321541Srgrimes return ((*linesw[tp->t_line].l_write)(tp, uio, flag)); 2331541Srgrimes} 2341541Srgrimes 2351541Srgrimes/* 2361541Srgrimes * Start output on pseudo-tty. 2371541Srgrimes * Wake up process selecting or sleeping for input from controlling tty. 2381541Srgrimes */ 2391541Srgrimesvoid 2401541Srgrimesptsstart(tp) 2411541Srgrimes struct tty *tp; 2421541Srgrimes{ 2431541Srgrimes register struct pt_ioctl *pti = &pt_ioctl[minor(tp->t_dev)]; 2441541Srgrimes 2451541Srgrimes if (tp->t_state & TS_TTSTOP) 2461541Srgrimes return; 2471541Srgrimes if (pti->pt_flags & PF_STOPPED) { 2481541Srgrimes pti->pt_flags &= ~PF_STOPPED; 2491541Srgrimes pti->pt_send = TIOCPKT_START; 2501541Srgrimes } 2511541Srgrimes ptcwakeup(tp, FREAD); 2521541Srgrimes} 2531541Srgrimes 2541549Srgrimesvoid 2551541Srgrimesptcwakeup(tp, flag) 2561541Srgrimes struct tty *tp; 2571541Srgrimes int flag; 2581541Srgrimes{ 2591541Srgrimes struct pt_ioctl *pti = &pt_ioctl[minor(tp->t_dev)]; 2601541Srgrimes 2611541Srgrimes if (flag & FREAD) { 2621541Srgrimes selwakeup(&pti->pt_selr); 2639639Sbde wakeup(TSA_PTC_READ(tp)); 2641541Srgrimes } 2651541Srgrimes if (flag & FWRITE) { 2661541Srgrimes selwakeup(&pti->pt_selw); 2679639Sbde wakeup(TSA_PTC_WRITE(tp)); 2681541Srgrimes } 2691541Srgrimes} 2701541Srgrimes 2711549Srgrimesint 2721541Srgrimesptcopen(dev, flag, devtype, p) 2731541Srgrimes dev_t dev; 2741541Srgrimes int flag, devtype; 2751541Srgrimes struct proc *p; 2761541Srgrimes{ 2771541Srgrimes register struct tty *tp; 2781541Srgrimes struct pt_ioctl *pti; 2791541Srgrimes 2801541Srgrimes if (minor(dev) >= npty) 2811541Srgrimes return (ENXIO); 2821541Srgrimes tp = &pt_tty[minor(dev)]; 2831541Srgrimes if (tp->t_oproc) 2841541Srgrimes return (EIO); 2851541Srgrimes tp->t_oproc = ptsstart; 2861541Srgrimes#ifdef sun4c 2871541Srgrimes tp->t_stop = ptsstop; 2881541Srgrimes#endif 2891541Srgrimes (void)(*linesw[tp->t_line].l_modem)(tp, 1); 2901541Srgrimes tp->t_lflag &= ~EXTPROC; 2911541Srgrimes pti = &pt_ioctl[minor(dev)]; 2921541Srgrimes pti->pt_flags = 0; 2931541Srgrimes pti->pt_send = 0; 2941541Srgrimes pti->pt_ucntl = 0; 2951541Srgrimes return (0); 2961541Srgrimes} 2971541Srgrimes 2981549Srgrimesint 2991541Srgrimesptcclose(dev) 3001541Srgrimes dev_t dev; 3011541Srgrimes{ 3021541Srgrimes register struct tty *tp; 3031541Srgrimes 3041541Srgrimes tp = &pt_tty[minor(dev)]; 3051541Srgrimes (void)(*linesw[tp->t_line].l_modem)(tp, 0); 3069824Sbde 3079824Sbde /* 3089824Sbde * XXX MDMBUF makes no sense for ptys but would inhibit the above 3099824Sbde * l_modem(). CLOCAL makes sense but isn't supported. Special 3109824Sbde * l_modem()s that ignore carrier drop make no sense for ptys but 3119824Sbde * may be in use because other parts of the line discipline make 3129824Sbde * sense for ptys. Recover by doing everything that a normal 3139824Sbde * ttymodem() would have done except for sending a SIGHUP. 3149824Sbde */ 3159824Sbde tp->t_state &= ~(TS_CARR_ON | TS_CONNECTED); 3169824Sbde tp->t_state |= TS_ZOMBIE; 3179824Sbde ttyflush(tp, FREAD | FWRITE); 3189824Sbde 3191541Srgrimes tp->t_oproc = 0; /* mark closed */ 3201541Srgrimes tp->t_session = 0; 3211541Srgrimes return (0); 3221541Srgrimes} 3231541Srgrimes 3241549Srgrimesint 3251541Srgrimesptcread(dev, uio, flag) 3261541Srgrimes dev_t dev; 3271541Srgrimes struct uio *uio; 3281541Srgrimes int flag; 3291541Srgrimes{ 3301541Srgrimes register struct tty *tp = &pt_tty[minor(dev)]; 3311541Srgrimes struct pt_ioctl *pti = &pt_ioctl[minor(dev)]; 3321541Srgrimes char buf[BUFSIZ]; 3331541Srgrimes int error = 0, cc; 3341541Srgrimes 3351541Srgrimes /* 3361541Srgrimes * We want to block until the slave 3371541Srgrimes * is open, and there's something to read; 3381541Srgrimes * but if we lost the slave or we're NBIO, 3391541Srgrimes * then return the appropriate error instead. 3401541Srgrimes */ 3411541Srgrimes for (;;) { 3421541Srgrimes if (tp->t_state&TS_ISOPEN) { 3431541Srgrimes if (pti->pt_flags&PF_PKT && pti->pt_send) { 3441541Srgrimes error = ureadc((int)pti->pt_send, uio); 3451541Srgrimes if (error) 3461541Srgrimes return (error); 3471541Srgrimes if (pti->pt_send & TIOCPKT_IOCTL) { 3481541Srgrimes cc = min(uio->uio_resid, 3491541Srgrimes sizeof(tp->t_termios)); 3502807Sbde uiomove((caddr_t)&tp->t_termios, cc, 3512807Sbde uio); 3521541Srgrimes } 3531541Srgrimes pti->pt_send = 0; 3541541Srgrimes return (0); 3551541Srgrimes } 3561541Srgrimes if (pti->pt_flags&PF_UCNTL && pti->pt_ucntl) { 3571541Srgrimes error = ureadc((int)pti->pt_ucntl, uio); 3581541Srgrimes if (error) 3591541Srgrimes return (error); 3601541Srgrimes pti->pt_ucntl = 0; 3611541Srgrimes return (0); 3621541Srgrimes } 3631541Srgrimes if (tp->t_outq.c_cc && (tp->t_state&TS_TTSTOP) == 0) 3641541Srgrimes break; 3651541Srgrimes } 3669824Sbde if ((tp->t_state & TS_CONNECTED) == 0) 3671541Srgrimes return (0); /* EOF */ 3681541Srgrimes if (flag & IO_NDELAY) 3691541Srgrimes return (EWOULDBLOCK); 3709639Sbde error = tsleep(TSA_PTC_READ(tp), TTIPRI | PCATCH, "ptcin", 0); 3713308Sphk if (error) 3721541Srgrimes return (error); 3731541Srgrimes } 3741541Srgrimes if (pti->pt_flags & (PF_PKT|PF_UCNTL)) 3751541Srgrimes error = ureadc(0, uio); 3761541Srgrimes while (uio->uio_resid > 0 && error == 0) { 3771541Srgrimes cc = q_to_b(&tp->t_outq, buf, min(uio->uio_resid, BUFSIZ)); 3781541Srgrimes if (cc <= 0) 3791541Srgrimes break; 3801541Srgrimes error = uiomove(buf, cc, uio); 3811541Srgrimes } 3829626Sbde ttwwakeup(tp); 3831541Srgrimes return (error); 3841541Srgrimes} 3851541Srgrimes 3861541Srgrimesvoid 3871541Srgrimesptsstop(tp, flush) 3881541Srgrimes register struct tty *tp; 3891541Srgrimes int flush; 3901541Srgrimes{ 3911541Srgrimes struct pt_ioctl *pti = &pt_ioctl[minor(tp->t_dev)]; 3921541Srgrimes int flag; 3931541Srgrimes 3941541Srgrimes /* note: FLUSHREAD and FLUSHWRITE already ok */ 3951541Srgrimes if (flush == 0) { 3961541Srgrimes flush = TIOCPKT_STOP; 3971541Srgrimes pti->pt_flags |= PF_STOPPED; 3981541Srgrimes } else 3991541Srgrimes pti->pt_flags &= ~PF_STOPPED; 4001541Srgrimes pti->pt_send |= flush; 4011541Srgrimes /* change of perspective */ 4021541Srgrimes flag = 0; 4031541Srgrimes if (flush & FREAD) 4041541Srgrimes flag |= FWRITE; 4051541Srgrimes if (flush & FWRITE) 4061541Srgrimes flag |= FREAD; 4071541Srgrimes ptcwakeup(tp, flag); 4081541Srgrimes} 4091541Srgrimes 4101549Srgrimesint 4111541Srgrimesptcselect(dev, rw, p) 4121541Srgrimes dev_t dev; 4131541Srgrimes int rw; 4141541Srgrimes struct proc *p; 4151541Srgrimes{ 4161541Srgrimes register struct tty *tp = &pt_tty[minor(dev)]; 4171541Srgrimes struct pt_ioctl *pti = &pt_ioctl[minor(dev)]; 4181541Srgrimes int s; 4191541Srgrimes 4209824Sbde if ((tp->t_state & TS_CONNECTED) == 0) 4211541Srgrimes return (1); 4221541Srgrimes switch (rw) { 4231541Srgrimes 4241541Srgrimes case FREAD: 4251541Srgrimes /* 4261541Srgrimes * Need to block timeouts (ttrstart). 4271541Srgrimes */ 4281541Srgrimes s = spltty(); 4291541Srgrimes if ((tp->t_state&TS_ISOPEN) && 4301541Srgrimes tp->t_outq.c_cc && (tp->t_state&TS_TTSTOP) == 0) { 4311541Srgrimes splx(s); 4321541Srgrimes return (1); 4331541Srgrimes } 4341541Srgrimes splx(s); 4351541Srgrimes /* FALLTHROUGH */ 4361541Srgrimes 4371541Srgrimes case 0: /* exceptional */ 4381541Srgrimes if ((tp->t_state&TS_ISOPEN) && 4393308Sphk ((pti->pt_flags&PF_PKT && pti->pt_send) || 4403308Sphk (pti->pt_flags&PF_UCNTL && pti->pt_ucntl))) 4411541Srgrimes return (1); 4421541Srgrimes selrecord(p, &pti->pt_selr); 4431541Srgrimes break; 4441541Srgrimes 4451541Srgrimes 4461541Srgrimes case FWRITE: 4471541Srgrimes if (tp->t_state&TS_ISOPEN) { 4481541Srgrimes if (pti->pt_flags & PF_REMOTE) { 4491541Srgrimes if (tp->t_canq.c_cc == 0) 4501541Srgrimes return (1); 4511541Srgrimes } else { 4521541Srgrimes if (tp->t_rawq.c_cc + tp->t_canq.c_cc < TTYHOG-2) 4531541Srgrimes return (1); 4541541Srgrimes if (tp->t_canq.c_cc == 0 && (tp->t_iflag&ICANON)) 4551541Srgrimes return (1); 4561541Srgrimes } 4571541Srgrimes } 4581541Srgrimes selrecord(p, &pti->pt_selw); 4591541Srgrimes break; 4601541Srgrimes 4611541Srgrimes } 4621541Srgrimes return (0); 4631541Srgrimes} 4641541Srgrimes 4651549Srgrimesint 4661541Srgrimesptcwrite(dev, uio, flag) 4671541Srgrimes dev_t dev; 4681541Srgrimes register struct uio *uio; 4691541Srgrimes int flag; 4701541Srgrimes{ 4711541Srgrimes register struct tty *tp = &pt_tty[minor(dev)]; 4721549Srgrimes register u_char *cp = 0; 4731541Srgrimes register int cc = 0; 4741541Srgrimes u_char locbuf[BUFSIZ]; 4751541Srgrimes int cnt = 0; 4761541Srgrimes struct pt_ioctl *pti = &pt_ioctl[minor(dev)]; 4771541Srgrimes int error = 0; 4781541Srgrimes 4791541Srgrimesagain: 4801541Srgrimes if ((tp->t_state&TS_ISOPEN) == 0) 4811541Srgrimes goto block; 4821541Srgrimes if (pti->pt_flags & PF_REMOTE) { 4831541Srgrimes if (tp->t_canq.c_cc) 4841541Srgrimes goto block; 4851541Srgrimes while (uio->uio_resid > 0 && tp->t_canq.c_cc < TTYHOG - 1) { 4861541Srgrimes if (cc == 0) { 4871541Srgrimes cc = min(uio->uio_resid, BUFSIZ); 4881541Srgrimes cc = min(cc, TTYHOG - 1 - tp->t_canq.c_cc); 4891541Srgrimes cp = locbuf; 4901541Srgrimes error = uiomove((caddr_t)cp, cc, uio); 4911541Srgrimes if (error) 4921541Srgrimes return (error); 4931541Srgrimes /* check again for safety */ 4941541Srgrimes if ((tp->t_state&TS_ISOPEN) == 0) 4951541Srgrimes return (EIO); 4961541Srgrimes } 4971541Srgrimes if (cc) 4981541Srgrimes (void) b_to_q((char *)cp, cc, &tp->t_canq); 4991541Srgrimes cc = 0; 5001541Srgrimes } 5011541Srgrimes (void) putc(0, &tp->t_canq); 5021541Srgrimes ttwakeup(tp); 5039639Sbde wakeup(TSA_PTS_READ(tp)); 5041541Srgrimes return (0); 5051541Srgrimes } 5061541Srgrimes while (uio->uio_resid > 0) { 5071541Srgrimes if (cc == 0) { 5081541Srgrimes cc = min(uio->uio_resid, BUFSIZ); 5091541Srgrimes cp = locbuf; 5101541Srgrimes error = uiomove((caddr_t)cp, cc, uio); 5111541Srgrimes if (error) 5121541Srgrimes return (error); 5131541Srgrimes /* check again for safety */ 5141541Srgrimes if ((tp->t_state&TS_ISOPEN) == 0) 5151541Srgrimes return (EIO); 5161541Srgrimes } 5171541Srgrimes while (cc > 0) { 5181541Srgrimes if ((tp->t_rawq.c_cc + tp->t_canq.c_cc) >= TTYHOG - 2 && 5191541Srgrimes (tp->t_canq.c_cc > 0 || !(tp->t_iflag&ICANON))) { 5209824Sbde wakeup(TSA_HUP_OR_INPUT(tp)); 5211541Srgrimes goto block; 5221541Srgrimes } 5231541Srgrimes (*linesw[tp->t_line].l_rint)(*cp++, tp); 5241541Srgrimes cnt++; 5251541Srgrimes cc--; 5261541Srgrimes } 5271541Srgrimes cc = 0; 5281541Srgrimes } 5291541Srgrimes return (0); 5301541Srgrimesblock: 5311541Srgrimes /* 5321541Srgrimes * Come here to wait for slave to open, for space 5331541Srgrimes * in outq, or space in rawq. 5341541Srgrimes */ 5359824Sbde if ((tp->t_state & TS_CONNECTED) == 0) 5361541Srgrimes return (EIO); 5371541Srgrimes if (flag & IO_NDELAY) { 5381541Srgrimes /* adjust for data copied in but not written */ 5391541Srgrimes uio->uio_resid += cc; 5401541Srgrimes if (cnt == 0) 5411541Srgrimes return (EWOULDBLOCK); 5421541Srgrimes return (0); 5431541Srgrimes } 5449639Sbde error = tsleep(TSA_PTC_WRITE(tp), TTOPRI | PCATCH, "ptcout", 0); 5453308Sphk if (error) { 5461541Srgrimes /* adjust for data copied in but not written */ 5471541Srgrimes uio->uio_resid += cc; 5481541Srgrimes return (error); 5491541Srgrimes } 5501541Srgrimes goto again; 5511541Srgrimes} 5521541Srgrimes 5536712Spststruct tty * 5546712Spstptydevtotty(dev) 5556712Spst dev_t dev; 5566712Spst{ 5576712Spst if (minor(dev) >= npty) 5586712Spst return (NULL); 5596712Spst 5606712Spst return &pt_tty[minor(dev)]; 5616712Spst} 5626712Spst 5631541Srgrimes/*ARGSUSED*/ 5641549Srgrimesint 5651541Srgrimesptyioctl(dev, cmd, data, flag, p) 5661541Srgrimes dev_t dev; 5671541Srgrimes int cmd; 5681541Srgrimes caddr_t data; 5691541Srgrimes int flag; 5701541Srgrimes struct proc *p; 5711541Srgrimes{ 5721541Srgrimes register struct tty *tp = &pt_tty[minor(dev)]; 5731541Srgrimes register struct pt_ioctl *pti = &pt_ioctl[minor(dev)]; 5741541Srgrimes register u_char *cc = tp->t_cc; 5751541Srgrimes int stop, error; 5761541Srgrimes 5771541Srgrimes /* 5781541Srgrimes * IF CONTROLLER STTY THEN MUST FLUSH TO PREVENT A HANG. 5791541Srgrimes * ttywflush(tp) will hang if there are characters in the outq. 5801541Srgrimes */ 5811541Srgrimes if (cmd == TIOCEXT) { 5821541Srgrimes /* 5831541Srgrimes * When the EXTPROC bit is being toggled, we need 5841541Srgrimes * to send an TIOCPKT_IOCTL if the packet driver 5851541Srgrimes * is turned on. 5861541Srgrimes */ 5871541Srgrimes if (*(int *)data) { 5881541Srgrimes if (pti->pt_flags & PF_PKT) { 5891541Srgrimes pti->pt_send |= TIOCPKT_IOCTL; 5901541Srgrimes ptcwakeup(tp, FREAD); 5911541Srgrimes } 5921541Srgrimes tp->t_lflag |= EXTPROC; 5931541Srgrimes } else { 5941541Srgrimes if ((tp->t_state & EXTPROC) && 5951541Srgrimes (pti->pt_flags & PF_PKT)) { 5961541Srgrimes pti->pt_send |= TIOCPKT_IOCTL; 5971541Srgrimes ptcwakeup(tp, FREAD); 5981541Srgrimes } 5991541Srgrimes tp->t_lflag &= ~EXTPROC; 6001541Srgrimes } 6011541Srgrimes return(0); 6021541Srgrimes } else 6031541Srgrimes if (cdevsw[major(dev)].d_open == ptcopen) 6041541Srgrimes switch (cmd) { 6051541Srgrimes 6061541Srgrimes case TIOCGPGRP: 6071541Srgrimes /* 6081541Srgrimes * We aviod calling ttioctl on the controller since, 6091541Srgrimes * in that case, tp must be the controlling terminal. 6101541Srgrimes */ 6111541Srgrimes *(int *)data = tp->t_pgrp ? tp->t_pgrp->pg_id : 0; 6121541Srgrimes return (0); 6131541Srgrimes 6141541Srgrimes case TIOCPKT: 6151541Srgrimes if (*(int *)data) { 6161541Srgrimes if (pti->pt_flags & PF_UCNTL) 6171541Srgrimes return (EINVAL); 6181541Srgrimes pti->pt_flags |= PF_PKT; 6191541Srgrimes } else 6201541Srgrimes pti->pt_flags &= ~PF_PKT; 6211541Srgrimes return (0); 6221541Srgrimes 6231541Srgrimes case TIOCUCNTL: 6241541Srgrimes if (*(int *)data) { 6251541Srgrimes if (pti->pt_flags & PF_PKT) 6261541Srgrimes return (EINVAL); 6271541Srgrimes pti->pt_flags |= PF_UCNTL; 6281541Srgrimes } else 6291541Srgrimes pti->pt_flags &= ~PF_UCNTL; 6301541Srgrimes return (0); 6311541Srgrimes 6321541Srgrimes case TIOCREMOTE: 6331541Srgrimes if (*(int *)data) 6341541Srgrimes pti->pt_flags |= PF_REMOTE; 6351541Srgrimes else 6361541Srgrimes pti->pt_flags &= ~PF_REMOTE; 6371541Srgrimes ttyflush(tp, FREAD|FWRITE); 6381541Srgrimes return (0); 6391541Srgrimes 6401541Srgrimes#ifdef COMPAT_43 6418876Srgrimes case TIOCSETP: 6421541Srgrimes case TIOCSETN: 6431541Srgrimes#endif 6441541Srgrimes case TIOCSETD: 6451541Srgrimes case TIOCSETA: 6461541Srgrimes case TIOCSETAW: 6471541Srgrimes case TIOCSETAF: 6481541Srgrimes ndflush(&tp->t_outq, tp->t_outq.c_cc); 6491541Srgrimes break; 6501541Srgrimes 6511541Srgrimes case TIOCSIG: 6521541Srgrimes if (*(unsigned int *)data >= NSIG) 6531541Srgrimes return(EINVAL); 6541541Srgrimes if ((tp->t_lflag&NOFLSH) == 0) 6551541Srgrimes ttyflush(tp, FREAD|FWRITE); 6561541Srgrimes pgsignal(tp->t_pgrp, *(unsigned int *)data, 1); 6571541Srgrimes if ((*(unsigned int *)data == SIGINFO) && 6581541Srgrimes ((tp->t_lflag&NOKERNINFO) == 0)) 6591541Srgrimes ttyinfo(tp); 6601541Srgrimes return(0); 6611541Srgrimes } 6621541Srgrimes error = (*linesw[tp->t_line].l_ioctl)(tp, cmd, data, flag, p); 6631541Srgrimes if (error < 0) 6641541Srgrimes error = ttioctl(tp, cmd, data, flag); 6651541Srgrimes if (error < 0) { 6661541Srgrimes if (pti->pt_flags & PF_UCNTL && 6671541Srgrimes (cmd & ~0xff) == UIOCCMD(0)) { 6681541Srgrimes if (cmd & 0xff) { 6691541Srgrimes pti->pt_ucntl = (u_char)cmd; 6701541Srgrimes ptcwakeup(tp, FREAD); 6711541Srgrimes } 6721541Srgrimes return (0); 6731541Srgrimes } 6741541Srgrimes error = ENOTTY; 6751541Srgrimes } 6761541Srgrimes /* 6771541Srgrimes * If external processing and packet mode send ioctl packet. 6781541Srgrimes */ 6791541Srgrimes if ((tp->t_lflag&EXTPROC) && (pti->pt_flags & PF_PKT)) { 6801541Srgrimes switch(cmd) { 6811541Srgrimes case TIOCSETA: 6821541Srgrimes case TIOCSETAW: 6831541Srgrimes case TIOCSETAF: 6841541Srgrimes#ifdef COMPAT_43 6851541Srgrimes case TIOCSETP: 6861541Srgrimes case TIOCSETN: 6871541Srgrimes#endif 6881541Srgrimes#if defined(COMPAT_43) || defined(COMPAT_SUNOS) 6891541Srgrimes case TIOCSETC: 6901541Srgrimes case TIOCSLTC: 6911541Srgrimes case TIOCLBIS: 6921541Srgrimes case TIOCLBIC: 6931541Srgrimes case TIOCLSET: 6941541Srgrimes#endif 6951541Srgrimes pti->pt_send |= TIOCPKT_IOCTL; 6961541Srgrimes ptcwakeup(tp, FREAD); 6971541Srgrimes default: 6981541Srgrimes break; 6991541Srgrimes } 7001541Srgrimes } 7018876Srgrimes stop = (tp->t_iflag & IXON) && CCEQ(cc[VSTOP], CTRL('s')) 7021541Srgrimes && CCEQ(cc[VSTART], CTRL('q')); 7031541Srgrimes if (pti->pt_flags & PF_NOSTOP) { 7041541Srgrimes if (stop) { 7051541Srgrimes pti->pt_send &= ~TIOCPKT_NOSTOP; 7061541Srgrimes pti->pt_send |= TIOCPKT_DOSTOP; 7071541Srgrimes pti->pt_flags &= ~PF_NOSTOP; 7081541Srgrimes ptcwakeup(tp, FREAD); 7091541Srgrimes } 7101541Srgrimes } else { 7111541Srgrimes if (!stop) { 7121541Srgrimes pti->pt_send &= ~TIOCPKT_DOSTOP; 7131541Srgrimes pti->pt_send |= TIOCPKT_NOSTOP; 7141541Srgrimes pti->pt_flags |= PF_NOSTOP; 7151541Srgrimes ptcwakeup(tp, FREAD); 7161541Srgrimes } 7171541Srgrimes } 7181541Srgrimes return (error); 7191541Srgrimes} 720