pty.c revision 59818
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 * 3314511Shsu * @(#)tty_pty.c 8.4 (Berkeley) 2/20/95 3450477Speter * $FreeBSD: head/sys/kern/tty_pty.c 59818 2000-05-01 10:24:21Z ache $ 351541Srgrimes */ 361541Srgrimes 371541Srgrimes/* 381541Srgrimes * Pseudo-teletype Driver 391541Srgrimes * (Actually two drivers, requiring two entries in 'cdevsw') 401541Srgrimes */ 411541Srgrimes#include "pty.h" /* XXX */ 4231778Seivind#include "opt_compat.h" 431541Srgrimes#include <sys/param.h> 441541Srgrimes#include <sys/systm.h> 4524207Sbde#if defined(COMPAT_43) || defined(COMPAT_SUNOS) 4624207Sbde#include <sys/ioctl_compat.h> 4724207Sbde#endif 481541Srgrimes#include <sys/proc.h> 491541Srgrimes#include <sys/tty.h> 501541Srgrimes#include <sys/conf.h> 5124131Sbde#include <sys/fcntl.h> 5229354Speter#include <sys/poll.h> 531541Srgrimes#include <sys/kernel.h> 541541Srgrimes#include <sys/vnode.h> 553308Sphk#include <sys/signalvar.h> 5649536Sphk#include <sys/malloc.h> 571541Srgrimes 5849536SphkMALLOC_DEFINE(M_PTY, "ptys", "pty data structures"); 5912517Sjulian 6012819Sphkstatic void ptsstart __P((struct tty *tp)); 6151654Sphkstatic void ptsstop __P((struct tty *tp, int rw)); 6212819Sphkstatic void ptcwakeup __P((struct tty *tp, int flag)); 6349536Sphkstatic void ptyinit __P((int n)); 6411789Sbde 6512675Sjulianstatic d_open_t ptsopen; 6612675Sjulianstatic d_close_t ptsclose; 6712675Sjulianstatic d_read_t ptsread; 6812675Sjulianstatic d_write_t ptswrite; 6912675Sjulianstatic d_ioctl_t ptyioctl; 7012675Sjulianstatic d_open_t ptcopen; 7112675Sjulianstatic d_close_t ptcclose; 7212675Sjulianstatic d_read_t ptcread; 7312675Sjulianstatic d_write_t ptcwrite; 7429354Speterstatic d_poll_t ptcpoll; 7512675Sjulian 7638485Sbde#define CDEV_MAJOR_S 5 7747625Sphkstatic struct cdevsw pts_cdevsw = { 7847625Sphk /* open */ ptsopen, 7947625Sphk /* close */ ptsclose, 8047625Sphk /* read */ ptsread, 8147625Sphk /* write */ ptswrite, 8247625Sphk /* ioctl */ ptyioctl, 8351654Sphk /* poll */ ttypoll, 8447625Sphk /* mmap */ nommap, 8547625Sphk /* strategy */ nostrategy, 8647625Sphk /* name */ "pts", 8747625Sphk /* maj */ CDEV_MAJOR_S, 8847625Sphk /* dump */ nodump, 8947625Sphk /* psize */ nopsize, 9047625Sphk /* flags */ D_TTY, 9147625Sphk /* bmaj */ -1 9238485Sbde}; 9312675Sjulian 9438485Sbde#define CDEV_MAJOR_C 6 9547625Sphkstatic struct cdevsw ptc_cdevsw = { 9647625Sphk /* open */ ptcopen, 9747625Sphk /* close */ ptcclose, 9847625Sphk /* read */ ptcread, 9947625Sphk /* write */ ptcwrite, 10047625Sphk /* ioctl */ ptyioctl, 10147625Sphk /* poll */ ptcpoll, 10247625Sphk /* mmap */ nommap, 10347625Sphk /* strategy */ nostrategy, 10447625Sphk /* name */ "ptc", 10547625Sphk /* maj */ CDEV_MAJOR_C, 10647625Sphk /* dump */ nodump, 10747625Sphk /* psize */ nopsize, 10847625Sphk /* flags */ D_TTY, 10947625Sphk /* bmaj */ -1 11038485Sbde}; 11112675Sjulian 1121541Srgrimes#define BUFSIZ 100 /* Chunk size iomoved to/from user */ 1131541Srgrimes 11449536Sphkstruct pt_ioctl { 1151541Srgrimes int pt_flags; 1161541Srgrimes struct selinfo pt_selr, pt_selw; 1171541Srgrimes u_char pt_send; 1181541Srgrimes u_char pt_ucntl; 11949536Sphk struct tty pt_tty; 12050092Sjulian dev_t devs, devc; 12157070Srwatson struct prison *pt_prison; 12249536Sphk}; 1231541Srgrimes 1241541Srgrimes#define PF_PKT 0x08 /* packet mode */ 1251541Srgrimes#define PF_STOPPED 0x10 /* user told stopped */ 1261541Srgrimes#define PF_REMOTE 0x20 /* remote and flow controlled input */ 1271541Srgrimes#define PF_NOSTOP 0x40 1281541Srgrimes#define PF_UCNTL 0x80 /* user control mode */ 1291541Srgrimes 1301541Srgrimes/* 13149536Sphk * This function creates and initializes a pts/ptc pair 1321541Srgrimes * 13349536Sphk * pts == /dev/tty[pqrsPQRS][0123456789abcdefghijklmnopqrstuv] 13449536Sphk * ptc == /dev/pty[pqrsPQRS][0123456789abcdefghijklmnopqrstuv] 13549536Sphk * 13649536Sphk * XXX: define and add mapping of upper minor bits to allow more 13749536Sphk * than 256 ptys. 1381541Srgrimes */ 13912819Sphkstatic void 14049536Sphkptyinit(n) 1411541Srgrimes int n; 1421541Srgrimes{ 14349536Sphk dev_t devs, devc; 14449536Sphk char *names = "pqrsPQRS"; 14549536Sphk struct pt_ioctl *pt; 1461541Srgrimes 14749536Sphk /* For now we only map the lower 8 bits of the minor */ 14849536Sphk if (n & ~0xff) 14949536Sphk return; 15049536Sphk 15150092Sjulian pt = malloc(sizeof(*pt), M_PTY, M_WAITOK); 15250092Sjulian bzero(pt, sizeof(*pt)); 15350092Sjulian pt->devs = devs = make_dev(&pts_cdevsw, n, 15449536Sphk 0, 0, 0666, "tty%c%r", names[n / 32], n % 32); 15550092Sjulian pt->devc = devc = make_dev(&ptc_cdevsw, n, 15649536Sphk 0, 0, 0666, "pty%c%r", names[n / 32], n % 32); 15749536Sphk 15849536Sphk devs->si_drv1 = devc->si_drv1 = pt; 15950652Sphk devs->si_tty = devc->si_tty = &pt->pt_tty; 16049540Sphk ttyregister(&pt->pt_tty); 16116322Sgpalmer} 1621541Srgrimes 1631541Srgrimes/*ARGSUSED*/ 16412675Sjulianstatic int 1651541Srgrimesptsopen(dev, flag, devtype, p) 1661541Srgrimes dev_t dev; 1671541Srgrimes int flag, devtype; 1681541Srgrimes struct proc *p; 1691541Srgrimes{ 1701541Srgrimes register struct tty *tp; 1711541Srgrimes int error; 17249992Sjulian int minr; 17349992Sjulian dev_t nextdev; 17457070Srwatson struct pt_ioctl *pti; 1751541Srgrimes 17649992Sjulian /* 17750254Sphk * XXX: Gross hack for DEVFS: 17849992Sjulian * If we openned this device, ensure we have the 17950254Sphk * next one too, so people can open it. 18049992Sjulian */ 18149992Sjulian minr = lminor(dev); 18249992Sjulian if (minr < 255) { 18349992Sjulian nextdev = makedev(major(dev), minr + 1); 18449992Sjulian if (!nextdev->si_drv1) { 18549992Sjulian ptyinit(minr + 1); 18649992Sjulian } 18749992Sjulian } 18849536Sphk if (!dev->si_drv1) 18949536Sphk ptyinit(minor(dev)); 19049536Sphk if (!dev->si_drv1) 19149536Sphk return(ENXIO); 19257070Srwatson pti = dev->si_drv1; 19350652Sphk tp = dev->si_tty; 1941541Srgrimes if ((tp->t_state & TS_ISOPEN) == 0) { 1951541Srgrimes ttychars(tp); /* Set up default chars */ 1961541Srgrimes tp->t_iflag = TTYDEF_IFLAG; 1971541Srgrimes tp->t_oflag = TTYDEF_OFLAG; 1981541Srgrimes tp->t_lflag = TTYDEF_LFLAG; 1991541Srgrimes tp->t_cflag = TTYDEF_CFLAG; 2001541Srgrimes tp->t_ispeed = tp->t_ospeed = TTYDEF_SPEED; 20157070Srwatson } else if (tp->t_state & TS_XCLUDE && suser(p)) { 2021541Srgrimes return (EBUSY); 20357070Srwatson } else if (pti->pt_prison != p->p_prison) { 20457070Srwatson return (EBUSY); 20557070Srwatson } 2061541Srgrimes if (tp->t_oproc) /* Ctrlr still around. */ 2079824Sbde (void)(*linesw[tp->t_line].l_modem)(tp, 1); 2081541Srgrimes while ((tp->t_state & TS_CARR_ON) == 0) { 2091541Srgrimes if (flag&FNONBLOCK) 2101541Srgrimes break; 2119639Sbde error = ttysleep(tp, TSA_CARR_ON(tp), TTIPRI | PCATCH, 2129624Sbde "ptsopn", 0); 2133308Sphk if (error) 2141541Srgrimes return (error); 2151541Srgrimes } 2161541Srgrimes error = (*linesw[tp->t_line].l_open)(dev, tp); 2177724Sache if (error == 0) 2187724Sache ptcwakeup(tp, FREAD|FWRITE); 2191541Srgrimes return (error); 2201541Srgrimes} 2211541Srgrimes 22212675Sjulianstatic int 2231541Srgrimesptsclose(dev, flag, mode, p) 2241541Srgrimes dev_t dev; 2251541Srgrimes int flag, mode; 2261541Srgrimes struct proc *p; 2271541Srgrimes{ 2281541Srgrimes register struct tty *tp; 2291541Srgrimes int err; 2301541Srgrimes 23150652Sphk tp = dev->si_tty; 2321541Srgrimes err = (*linesw[tp->t_line].l_close)(tp, flag); 2337730Sache ptsstop(tp, FREAD|FWRITE); 2347724Sache (void) ttyclose(tp); 2351541Srgrimes return (err); 2361541Srgrimes} 2371541Srgrimes 23812675Sjulianstatic int 2391541Srgrimesptsread(dev, uio, flag) 2401541Srgrimes dev_t dev; 2411541Srgrimes struct uio *uio; 2421541Srgrimes int flag; 2431541Srgrimes{ 2441541Srgrimes struct proc *p = curproc; 24550652Sphk register struct tty *tp = dev->si_tty; 24649536Sphk register struct pt_ioctl *pti = dev->si_drv1; 2471541Srgrimes int error = 0; 2481541Srgrimes 2491541Srgrimesagain: 2501541Srgrimes if (pti->pt_flags & PF_REMOTE) { 2511541Srgrimes while (isbackground(p, tp)) { 25251791Smarcel if (SIGISMEMBER(p->p_sigignore, SIGTTIN) || 25351791Smarcel SIGISMEMBER(p->p_sigmask, SIGTTIN) || 25451791Smarcel p->p_pgrp->pg_jobc == 0 || p->p_flag & P_PPWAIT) 2551541Srgrimes return (EIO); 2561541Srgrimes pgsignal(p->p_pgrp, SIGTTIN, 1); 2579624Sbde error = ttysleep(tp, &lbolt, TTIPRI | PCATCH, "ptsbg", 2589624Sbde 0); 2593308Sphk if (error) 2601541Srgrimes return (error); 2611541Srgrimes } 2621541Srgrimes if (tp->t_canq.c_cc == 0) { 2631541Srgrimes if (flag & IO_NDELAY) 2641541Srgrimes return (EWOULDBLOCK); 2659639Sbde error = ttysleep(tp, TSA_PTS_READ(tp), TTIPRI | PCATCH, 2669624Sbde "ptsin", 0); 2673308Sphk if (error) 2681541Srgrimes return (error); 2691541Srgrimes goto again; 2701541Srgrimes } 2711541Srgrimes while (tp->t_canq.c_cc > 1 && uio->uio_resid > 0) 2721541Srgrimes if (ureadc(getc(&tp->t_canq), uio) < 0) { 2731541Srgrimes error = EFAULT; 2741541Srgrimes break; 2751541Srgrimes } 2761541Srgrimes if (tp->t_canq.c_cc == 1) 2771541Srgrimes (void) getc(&tp->t_canq); 2781541Srgrimes if (tp->t_canq.c_cc) 2791541Srgrimes return (error); 2801541Srgrimes } else 2811541Srgrimes if (tp->t_oproc) 2821541Srgrimes error = (*linesw[tp->t_line].l_read)(tp, uio, flag); 2831541Srgrimes ptcwakeup(tp, FWRITE); 2841541Srgrimes return (error); 2851541Srgrimes} 2861541Srgrimes 2871541Srgrimes/* 2881541Srgrimes * Write to pseudo-tty. 2891541Srgrimes * Wakeups of controlling tty will happen 2901541Srgrimes * indirectly, when tty driver calls ptsstart. 2911541Srgrimes */ 29212675Sjulianstatic int 2931541Srgrimesptswrite(dev, uio, flag) 2941541Srgrimes dev_t dev; 2951541Srgrimes struct uio *uio; 2961541Srgrimes int flag; 2971541Srgrimes{ 2981541Srgrimes register struct tty *tp; 2991541Srgrimes 30050652Sphk tp = dev->si_tty; 3011541Srgrimes if (tp->t_oproc == 0) 3021541Srgrimes return (EIO); 3031541Srgrimes return ((*linesw[tp->t_line].l_write)(tp, uio, flag)); 3041541Srgrimes} 3051541Srgrimes 3061541Srgrimes/* 3071541Srgrimes * Start output on pseudo-tty. 3081541Srgrimes * Wake up process selecting or sleeping for input from controlling tty. 3091541Srgrimes */ 31012819Sphkstatic void 3111541Srgrimesptsstart(tp) 3121541Srgrimes struct tty *tp; 3131541Srgrimes{ 31449536Sphk register struct pt_ioctl *pti = tp->t_dev->si_drv1; 3151541Srgrimes 3161541Srgrimes if (tp->t_state & TS_TTSTOP) 3171541Srgrimes return; 3181541Srgrimes if (pti->pt_flags & PF_STOPPED) { 3191541Srgrimes pti->pt_flags &= ~PF_STOPPED; 3201541Srgrimes pti->pt_send = TIOCPKT_START; 3211541Srgrimes } 3221541Srgrimes ptcwakeup(tp, FREAD); 3231541Srgrimes} 3241541Srgrimes 32512819Sphkstatic void 3261541Srgrimesptcwakeup(tp, flag) 3271541Srgrimes struct tty *tp; 3281541Srgrimes int flag; 3291541Srgrimes{ 33049536Sphk struct pt_ioctl *pti = tp->t_dev->si_drv1; 3311541Srgrimes 3321541Srgrimes if (flag & FREAD) { 3331541Srgrimes selwakeup(&pti->pt_selr); 3349639Sbde wakeup(TSA_PTC_READ(tp)); 3351541Srgrimes } 3361541Srgrimes if (flag & FWRITE) { 3371541Srgrimes selwakeup(&pti->pt_selw); 3389639Sbde wakeup(TSA_PTC_WRITE(tp)); 3391541Srgrimes } 3401541Srgrimes} 3411541Srgrimes 34212675Sjulianstatic int 3431541Srgrimesptcopen(dev, flag, devtype, p) 3441541Srgrimes dev_t dev; 3451541Srgrimes int flag, devtype; 3461541Srgrimes struct proc *p; 3471541Srgrimes{ 3481541Srgrimes register struct tty *tp; 3491541Srgrimes struct pt_ioctl *pti; 3501541Srgrimes 35149536Sphk if (!dev->si_drv1) 35249536Sphk ptyinit(minor(dev)); 35349536Sphk if (!dev->si_drv1) 35449536Sphk return(ENXIO); 35550652Sphk tp = dev->si_tty; 3561541Srgrimes if (tp->t_oproc) 3571541Srgrimes return (EIO); 35859818Sache tp->t_timeout = -1; 3591541Srgrimes tp->t_oproc = ptsstart; 36051654Sphk tp->t_stop = ptsstop; 3611541Srgrimes (void)(*linesw[tp->t_line].l_modem)(tp, 1); 3621541Srgrimes tp->t_lflag &= ~EXTPROC; 36349536Sphk pti = dev->si_drv1; 36457070Srwatson pti->pt_prison = p->p_prison; 3651541Srgrimes pti->pt_flags = 0; 3661541Srgrimes pti->pt_send = 0; 3671541Srgrimes pti->pt_ucntl = 0; 3681541Srgrimes return (0); 3691541Srgrimes} 3701541Srgrimes 37112675Sjulianstatic int 37210624Sbdeptcclose(dev, flags, fmt, p) 3731541Srgrimes dev_t dev; 37410624Sbde int flags; 37510624Sbde int fmt; 37610624Sbde struct proc *p; 3771541Srgrimes{ 3781541Srgrimes register struct tty *tp; 3791541Srgrimes 38050652Sphk tp = dev->si_tty; 3811541Srgrimes (void)(*linesw[tp->t_line].l_modem)(tp, 0); 3829824Sbde 3839824Sbde /* 3849824Sbde * XXX MDMBUF makes no sense for ptys but would inhibit the above 3859824Sbde * l_modem(). CLOCAL makes sense but isn't supported. Special 3869824Sbde * l_modem()s that ignore carrier drop make no sense for ptys but 3879824Sbde * may be in use because other parts of the line discipline make 3889824Sbde * sense for ptys. Recover by doing everything that a normal 3899824Sbde * ttymodem() would have done except for sending a SIGHUP. 3909824Sbde */ 3919850Sbde if (tp->t_state & TS_ISOPEN) { 3929850Sbde tp->t_state &= ~(TS_CARR_ON | TS_CONNECTED); 3939850Sbde tp->t_state |= TS_ZOMBIE; 3949850Sbde ttyflush(tp, FREAD | FWRITE); 3959850Sbde } 3969824Sbde 3971541Srgrimes tp->t_oproc = 0; /* mark closed */ 3981541Srgrimes return (0); 3991541Srgrimes} 4001541Srgrimes 40112675Sjulianstatic int 4021541Srgrimesptcread(dev, uio, flag) 4031541Srgrimes dev_t dev; 4041541Srgrimes struct uio *uio; 4051541Srgrimes int flag; 4061541Srgrimes{ 40750652Sphk register struct tty *tp = dev->si_tty; 40849536Sphk struct pt_ioctl *pti = dev->si_drv1; 4091541Srgrimes char buf[BUFSIZ]; 4101541Srgrimes int error = 0, cc; 4111541Srgrimes 4121541Srgrimes /* 4131541Srgrimes * We want to block until the slave 4141541Srgrimes * is open, and there's something to read; 4151541Srgrimes * but if we lost the slave or we're NBIO, 4161541Srgrimes * then return the appropriate error instead. 4171541Srgrimes */ 4181541Srgrimes for (;;) { 4191541Srgrimes if (tp->t_state&TS_ISOPEN) { 4201541Srgrimes if (pti->pt_flags&PF_PKT && pti->pt_send) { 4211541Srgrimes error = ureadc((int)pti->pt_send, uio); 4221541Srgrimes if (error) 4231541Srgrimes return (error); 4241541Srgrimes if (pti->pt_send & TIOCPKT_IOCTL) { 4251541Srgrimes cc = min(uio->uio_resid, 4261541Srgrimes sizeof(tp->t_termios)); 4272807Sbde uiomove((caddr_t)&tp->t_termios, cc, 4282807Sbde uio); 4291541Srgrimes } 4301541Srgrimes pti->pt_send = 0; 4311541Srgrimes return (0); 4321541Srgrimes } 4331541Srgrimes if (pti->pt_flags&PF_UCNTL && pti->pt_ucntl) { 4341541Srgrimes error = ureadc((int)pti->pt_ucntl, uio); 4351541Srgrimes if (error) 4361541Srgrimes return (error); 4371541Srgrimes pti->pt_ucntl = 0; 4381541Srgrimes return (0); 4391541Srgrimes } 4401541Srgrimes if (tp->t_outq.c_cc && (tp->t_state&TS_TTSTOP) == 0) 4411541Srgrimes break; 4421541Srgrimes } 4439824Sbde if ((tp->t_state & TS_CONNECTED) == 0) 4441541Srgrimes return (0); /* EOF */ 4451541Srgrimes if (flag & IO_NDELAY) 4461541Srgrimes return (EWOULDBLOCK); 4479639Sbde error = tsleep(TSA_PTC_READ(tp), TTIPRI | PCATCH, "ptcin", 0); 4483308Sphk if (error) 4491541Srgrimes return (error); 4501541Srgrimes } 4511541Srgrimes if (pti->pt_flags & (PF_PKT|PF_UCNTL)) 4521541Srgrimes error = ureadc(0, uio); 4531541Srgrimes while (uio->uio_resid > 0 && error == 0) { 4541541Srgrimes cc = q_to_b(&tp->t_outq, buf, min(uio->uio_resid, BUFSIZ)); 4551541Srgrimes if (cc <= 0) 4561541Srgrimes break; 4571541Srgrimes error = uiomove(buf, cc, uio); 4581541Srgrimes } 4599626Sbde ttwwakeup(tp); 4601541Srgrimes return (error); 4611541Srgrimes} 4621541Srgrimes 46312675Sjulianstatic void 4641541Srgrimesptsstop(tp, flush) 4651541Srgrimes register struct tty *tp; 4661541Srgrimes int flush; 4671541Srgrimes{ 46849536Sphk struct pt_ioctl *pti = tp->t_dev->si_drv1; 4691541Srgrimes int flag; 4701541Srgrimes 4711541Srgrimes /* note: FLUSHREAD and FLUSHWRITE already ok */ 4721541Srgrimes if (flush == 0) { 4731541Srgrimes flush = TIOCPKT_STOP; 4741541Srgrimes pti->pt_flags |= PF_STOPPED; 4751541Srgrimes } else 4761541Srgrimes pti->pt_flags &= ~PF_STOPPED; 4771541Srgrimes pti->pt_send |= flush; 4781541Srgrimes /* change of perspective */ 4791541Srgrimes flag = 0; 4801541Srgrimes if (flush & FREAD) 4811541Srgrimes flag |= FWRITE; 4821541Srgrimes if (flush & FWRITE) 4831541Srgrimes flag |= FREAD; 4841541Srgrimes ptcwakeup(tp, flag); 4851541Srgrimes} 4861541Srgrimes 48712675Sjulianstatic int 48829354Speterptcpoll(dev, events, p) 4891541Srgrimes dev_t dev; 49029354Speter int events; 4911541Srgrimes struct proc *p; 4921541Srgrimes{ 49350652Sphk register struct tty *tp = dev->si_tty; 49449536Sphk struct pt_ioctl *pti = dev->si_drv1; 49529354Speter int revents = 0; 4961541Srgrimes int s; 4971541Srgrimes 4989824Sbde if ((tp->t_state & TS_CONNECTED) == 0) 49929354Speter return (seltrue(dev, events, p) | POLLHUP); 5001541Srgrimes 50129354Speter /* 50229354Speter * Need to block timeouts (ttrstart). 50329354Speter */ 50429354Speter s = spltty(); 5051541Srgrimes 50629354Speter if (events & (POLLIN | POLLRDNORM)) 50729354Speter if ((tp->t_state & TS_ISOPEN) && 50829354Speter ((tp->t_outq.c_cc && (tp->t_state & TS_TTSTOP) == 0) || 50929354Speter ((pti->pt_flags & PF_PKT) && pti->pt_send) || 51029354Speter ((pti->pt_flags & PF_UCNTL) && pti->pt_ucntl))) 51129354Speter revents |= events & (POLLIN | POLLRDNORM); 5121541Srgrimes 51329354Speter if (events & (POLLOUT | POLLWRNORM)) 51429354Speter if (tp->t_state & TS_ISOPEN && 51529354Speter ((pti->pt_flags & PF_REMOTE) ? 51629354Speter (tp->t_canq.c_cc == 0) : 51729354Speter ((tp->t_rawq.c_cc + tp->t_canq.c_cc < TTYHOG - 2) || 51829354Speter (tp->t_canq.c_cc == 0 && (tp->t_iflag & ICANON))))) 51929354Speter revents |= events & (POLLOUT | POLLWRNORM); 5201541Srgrimes 52129354Speter if (events & POLLHUP) 52229354Speter if ((tp->t_state & TS_CARR_ON) == 0) 52329354Speter revents |= POLLHUP; 5241541Srgrimes 52529354Speter if (revents == 0) { 52629354Speter if (events & (POLLIN | POLLRDNORM)) 52729354Speter selrecord(p, &pti->pt_selr); 52829354Speter 52929354Speter if (events & (POLLOUT | POLLWRNORM)) 53029354Speter selrecord(p, &pti->pt_selw); 5311541Srgrimes } 53229354Speter splx(s); 53329354Speter 53429354Speter return (revents); 5351541Srgrimes} 5361541Srgrimes 53712675Sjulianstatic int 5381541Srgrimesptcwrite(dev, uio, flag) 5391541Srgrimes dev_t dev; 5401541Srgrimes register struct uio *uio; 5411541Srgrimes int flag; 5421541Srgrimes{ 54350652Sphk register struct tty *tp = dev->si_tty; 5441549Srgrimes register u_char *cp = 0; 5451541Srgrimes register int cc = 0; 5461541Srgrimes u_char locbuf[BUFSIZ]; 5471541Srgrimes int cnt = 0; 54849536Sphk struct pt_ioctl *pti = dev->si_drv1; 5491541Srgrimes int error = 0; 5501541Srgrimes 5511541Srgrimesagain: 5521541Srgrimes if ((tp->t_state&TS_ISOPEN) == 0) 5531541Srgrimes goto block; 5541541Srgrimes if (pti->pt_flags & PF_REMOTE) { 5551541Srgrimes if (tp->t_canq.c_cc) 5561541Srgrimes goto block; 55711789Sbde while ((uio->uio_resid > 0 || cc > 0) && 55811789Sbde tp->t_canq.c_cc < TTYHOG - 1) { 5591541Srgrimes if (cc == 0) { 5601541Srgrimes cc = min(uio->uio_resid, BUFSIZ); 5611541Srgrimes cc = min(cc, TTYHOG - 1 - tp->t_canq.c_cc); 5621541Srgrimes cp = locbuf; 5631541Srgrimes error = uiomove((caddr_t)cp, cc, uio); 5641541Srgrimes if (error) 5651541Srgrimes return (error); 5661541Srgrimes /* check again for safety */ 56711789Sbde if ((tp->t_state & TS_ISOPEN) == 0) { 56811789Sbde /* adjust as usual */ 56911789Sbde uio->uio_resid += cc; 5701541Srgrimes return (EIO); 57111789Sbde } 5721541Srgrimes } 57315199Sbde if (cc > 0) { 57415199Sbde cc = b_to_q((char *)cp, cc, &tp->t_canq); 57515199Sbde /* 57615199Sbde * XXX we don't guarantee that the canq size 57715199Sbde * is >= TTYHOG, so the above b_to_q() may 57815199Sbde * leave some bytes uncopied. However, space 57915199Sbde * is guaranteed for the null terminator if 58015199Sbde * we don't fail here since (TTYHOG - 1) is 58115199Sbde * not a multiple of CBSIZE. 58215199Sbde */ 58315199Sbde if (cc > 0) 58415199Sbde break; 58515199Sbde } 5861541Srgrimes } 58711789Sbde /* adjust for data copied in but not written */ 58811789Sbde uio->uio_resid += cc; 5891541Srgrimes (void) putc(0, &tp->t_canq); 5901541Srgrimes ttwakeup(tp); 5919639Sbde wakeup(TSA_PTS_READ(tp)); 5921541Srgrimes return (0); 5931541Srgrimes } 59411789Sbde while (uio->uio_resid > 0 || cc > 0) { 5951541Srgrimes if (cc == 0) { 5961541Srgrimes cc = min(uio->uio_resid, BUFSIZ); 5971541Srgrimes cp = locbuf; 5981541Srgrimes error = uiomove((caddr_t)cp, cc, uio); 5991541Srgrimes if (error) 6001541Srgrimes return (error); 6011541Srgrimes /* check again for safety */ 60211789Sbde if ((tp->t_state & TS_ISOPEN) == 0) { 60311789Sbde /* adjust for data copied in but not written */ 60411789Sbde uio->uio_resid += cc; 6051541Srgrimes return (EIO); 60611789Sbde } 6071541Srgrimes } 6081541Srgrimes while (cc > 0) { 6091541Srgrimes if ((tp->t_rawq.c_cc + tp->t_canq.c_cc) >= TTYHOG - 2 && 6101541Srgrimes (tp->t_canq.c_cc > 0 || !(tp->t_iflag&ICANON))) { 6119824Sbde wakeup(TSA_HUP_OR_INPUT(tp)); 6121541Srgrimes goto block; 6131541Srgrimes } 6141541Srgrimes (*linesw[tp->t_line].l_rint)(*cp++, tp); 6151541Srgrimes cnt++; 6161541Srgrimes cc--; 6171541Srgrimes } 6181541Srgrimes cc = 0; 6191541Srgrimes } 6201541Srgrimes return (0); 6211541Srgrimesblock: 6221541Srgrimes /* 6231541Srgrimes * Come here to wait for slave to open, for space 62415199Sbde * in outq, or space in rawq, or an empty canq. 6251541Srgrimes */ 62611789Sbde if ((tp->t_state & TS_CONNECTED) == 0) { 62711789Sbde /* adjust for data copied in but not written */ 62811789Sbde uio->uio_resid += cc; 6291541Srgrimes return (EIO); 63011789Sbde } 6311541Srgrimes if (flag & IO_NDELAY) { 6321541Srgrimes /* adjust for data copied in but not written */ 6331541Srgrimes uio->uio_resid += cc; 6341541Srgrimes if (cnt == 0) 6351541Srgrimes return (EWOULDBLOCK); 6361541Srgrimes return (0); 6371541Srgrimes } 6389639Sbde error = tsleep(TSA_PTC_WRITE(tp), TTOPRI | PCATCH, "ptcout", 0); 6393308Sphk if (error) { 6401541Srgrimes /* adjust for data copied in but not written */ 6411541Srgrimes uio->uio_resid += cc; 6421541Srgrimes return (error); 6431541Srgrimes } 6441541Srgrimes goto again; 6451541Srgrimes} 6461541Srgrimes 6471541Srgrimes/*ARGSUSED*/ 64812675Sjulianstatic int 6491541Srgrimesptyioctl(dev, cmd, data, flag, p) 6501541Srgrimes dev_t dev; 65136735Sdfr u_long cmd; 6521541Srgrimes caddr_t data; 6531541Srgrimes int flag; 6541541Srgrimes struct proc *p; 6551541Srgrimes{ 65650652Sphk register struct tty *tp = dev->si_tty; 65749536Sphk register struct pt_ioctl *pti = dev->si_drv1; 6581541Srgrimes register u_char *cc = tp->t_cc; 6591541Srgrimes int stop, error; 6601541Srgrimes 66147301Sluoqi if (devsw(dev)->d_open == ptcopen) { 6621541Srgrimes switch (cmd) { 6631541Srgrimes 6641541Srgrimes case TIOCGPGRP: 6651541Srgrimes /* 66633826Sbde * We avoid calling ttioctl on the controller since, 6671541Srgrimes * in that case, tp must be the controlling terminal. 6681541Srgrimes */ 6691541Srgrimes *(int *)data = tp->t_pgrp ? tp->t_pgrp->pg_id : 0; 6701541Srgrimes return (0); 6711541Srgrimes 6721541Srgrimes case TIOCPKT: 6731541Srgrimes if (*(int *)data) { 6741541Srgrimes if (pti->pt_flags & PF_UCNTL) 6751541Srgrimes return (EINVAL); 6761541Srgrimes pti->pt_flags |= PF_PKT; 6771541Srgrimes } else 6781541Srgrimes pti->pt_flags &= ~PF_PKT; 6791541Srgrimes return (0); 6801541Srgrimes 6811541Srgrimes case TIOCUCNTL: 6821541Srgrimes if (*(int *)data) { 6831541Srgrimes if (pti->pt_flags & PF_PKT) 6841541Srgrimes return (EINVAL); 6851541Srgrimes pti->pt_flags |= PF_UCNTL; 6861541Srgrimes } else 6871541Srgrimes pti->pt_flags &= ~PF_UCNTL; 6881541Srgrimes return (0); 6891541Srgrimes 6901541Srgrimes case TIOCREMOTE: 6911541Srgrimes if (*(int *)data) 6921541Srgrimes pti->pt_flags |= PF_REMOTE; 6931541Srgrimes else 6941541Srgrimes pti->pt_flags &= ~PF_REMOTE; 6951541Srgrimes ttyflush(tp, FREAD|FWRITE); 6961541Srgrimes return (0); 69747203Sluoqi } 6981541Srgrimes 69947203Sluoqi /* 70047203Sluoqi * The rest of the ioctls shouldn't be called until 70147301Sluoqi * the slave is open. 70247203Sluoqi */ 70347203Sluoqi if ((tp->t_state & TS_ISOPEN) == 0) 70447301Sluoqi return (EAGAIN); 70547203Sluoqi 70647203Sluoqi switch (cmd) { 7071541Srgrimes#ifdef COMPAT_43 7088876Srgrimes case TIOCSETP: 7091541Srgrimes case TIOCSETN: 7101541Srgrimes#endif 7111541Srgrimes case TIOCSETD: 7121541Srgrimes case TIOCSETA: 7131541Srgrimes case TIOCSETAW: 7149858Sache case TIOCSETAF: 71547301Sluoqi /* 71647301Sluoqi * IF CONTROLLER STTY THEN MUST FLUSH TO PREVENT A HANG. 71747301Sluoqi * ttywflush(tp) will hang if there are characters in 71847301Sluoqi * the outq. 71947301Sluoqi */ 7201541Srgrimes ndflush(&tp->t_outq, tp->t_outq.c_cc); 7211541Srgrimes break; 7221541Srgrimes 7231541Srgrimes case TIOCSIG: 72427770Sjmg if (*(unsigned int *)data >= NSIG || 72527770Sjmg *(unsigned int *)data == 0) 7261541Srgrimes return(EINVAL); 7271541Srgrimes if ((tp->t_lflag&NOFLSH) == 0) 7281541Srgrimes ttyflush(tp, FREAD|FWRITE); 7291541Srgrimes pgsignal(tp->t_pgrp, *(unsigned int *)data, 1); 7301541Srgrimes if ((*(unsigned int *)data == SIGINFO) && 7311541Srgrimes ((tp->t_lflag&NOKERNINFO) == 0)) 7321541Srgrimes ttyinfo(tp); 7331541Srgrimes return(0); 7341541Srgrimes } 73547203Sluoqi } 73647301Sluoqi if (cmd == TIOCEXT) { 73747301Sluoqi /* 73847301Sluoqi * When the EXTPROC bit is being toggled, we need 73947301Sluoqi * to send an TIOCPKT_IOCTL if the packet driver 74047301Sluoqi * is turned on. 74147301Sluoqi */ 74247301Sluoqi if (*(int *)data) { 74347301Sluoqi if (pti->pt_flags & PF_PKT) { 74447301Sluoqi pti->pt_send |= TIOCPKT_IOCTL; 74547301Sluoqi ptcwakeup(tp, FREAD); 74647301Sluoqi } 74747301Sluoqi tp->t_lflag |= EXTPROC; 74847301Sluoqi } else { 74947301Sluoqi if ((tp->t_lflag & EXTPROC) && 75047301Sluoqi (pti->pt_flags & PF_PKT)) { 75147301Sluoqi pti->pt_send |= TIOCPKT_IOCTL; 75247301Sluoqi ptcwakeup(tp, FREAD); 75347301Sluoqi } 75447301Sluoqi tp->t_lflag &= ~EXTPROC; 75547301Sluoqi } 75647301Sluoqi return(0); 75747301Sluoqi } 7581541Srgrimes error = (*linesw[tp->t_line].l_ioctl)(tp, cmd, data, flag, p); 75931577Sbde if (error == ENOIOCTL) 7601541Srgrimes error = ttioctl(tp, cmd, data, flag); 76131577Sbde if (error == ENOIOCTL) { 7621541Srgrimes if (pti->pt_flags & PF_UCNTL && 7631541Srgrimes (cmd & ~0xff) == UIOCCMD(0)) { 7641541Srgrimes if (cmd & 0xff) { 7651541Srgrimes pti->pt_ucntl = (u_char)cmd; 7661541Srgrimes ptcwakeup(tp, FREAD); 7671541Srgrimes } 7681541Srgrimes return (0); 7691541Srgrimes } 7701541Srgrimes error = ENOTTY; 7711541Srgrimes } 7721541Srgrimes /* 7731541Srgrimes * If external processing and packet mode send ioctl packet. 7741541Srgrimes */ 7751541Srgrimes if ((tp->t_lflag&EXTPROC) && (pti->pt_flags & PF_PKT)) { 7761541Srgrimes switch(cmd) { 7771541Srgrimes case TIOCSETA: 7781541Srgrimes case TIOCSETAW: 7791541Srgrimes case TIOCSETAF: 7801541Srgrimes#ifdef COMPAT_43 7811541Srgrimes case TIOCSETP: 7821541Srgrimes case TIOCSETN: 7831541Srgrimes#endif 7841541Srgrimes#if defined(COMPAT_43) || defined(COMPAT_SUNOS) 7851541Srgrimes case TIOCSETC: 7861541Srgrimes case TIOCSLTC: 7871541Srgrimes case TIOCLBIS: 7881541Srgrimes case TIOCLBIC: 7891541Srgrimes case TIOCLSET: 7901541Srgrimes#endif 7911541Srgrimes pti->pt_send |= TIOCPKT_IOCTL; 7921541Srgrimes ptcwakeup(tp, FREAD); 7931541Srgrimes default: 7941541Srgrimes break; 7951541Srgrimes } 7961541Srgrimes } 7978876Srgrimes stop = (tp->t_iflag & IXON) && CCEQ(cc[VSTOP], CTRL('s')) 7981541Srgrimes && CCEQ(cc[VSTART], CTRL('q')); 7991541Srgrimes if (pti->pt_flags & PF_NOSTOP) { 8001541Srgrimes if (stop) { 8011541Srgrimes pti->pt_send &= ~TIOCPKT_NOSTOP; 8021541Srgrimes pti->pt_send |= TIOCPKT_DOSTOP; 8031541Srgrimes pti->pt_flags &= ~PF_NOSTOP; 8041541Srgrimes ptcwakeup(tp, FREAD); 8051541Srgrimes } 8061541Srgrimes } else { 8071541Srgrimes if (!stop) { 8081541Srgrimes pti->pt_send &= ~TIOCPKT_DOSTOP; 8091541Srgrimes pti->pt_send |= TIOCPKT_NOSTOP; 8101541Srgrimes pti->pt_flags |= PF_NOSTOP; 8111541Srgrimes ptcwakeup(tp, FREAD); 8121541Srgrimes } 8131541Srgrimes } 8141541Srgrimes return (error); 8151541Srgrimes} 81612517Sjulian 81712517Sjulian 81829506Sbdestatic void ptc_drvinit __P((void *unused)); 81949536Sphk 82012675Sjulianstatic void 82129506Sbdeptc_drvinit(unused) 82229506Sbde void *unused; 82312517Sjulian{ 82453483Sjkh cdevsw_add(&pts_cdevsw); 82553483Sjkh cdevsw_add(&ptc_cdevsw); 82650254Sphk /* XXX: Gross hack for DEVFS */ 82750254Sphk ptyinit(0); 82812517Sjulian} 82912517Sjulian 83012517SjulianSYSINIT(ptcdev,SI_SUB_DRIVERS,SI_ORDER_MIDDLE+CDEV_MAJOR_C,ptc_drvinit,NULL) 831