pty.c revision 38485
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 3438485Sbde * $Id: tty_pty.c,v 1.53 1998/07/15 12:18:30 bde Exp $ 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" 4332726Seivind#include "opt_devfs.h" 441541Srgrimes 451541Srgrimes#include <sys/param.h> 461541Srgrimes#include <sys/systm.h> 4724207Sbde#if defined(COMPAT_43) || defined(COMPAT_SUNOS) 4824207Sbde#include <sys/ioctl_compat.h> 4924207Sbde#endif 501541Srgrimes#include <sys/proc.h> 511541Srgrimes#include <sys/tty.h> 521541Srgrimes#include <sys/conf.h> 5324131Sbde#include <sys/fcntl.h> 5429354Speter#include <sys/poll.h> 551541Srgrimes#include <sys/kernel.h> 561541Srgrimes#include <sys/vnode.h> 573308Sphk#include <sys/signalvar.h> 581541Srgrimes 5912517Sjulian#ifdef DEVFS 6012517Sjulian#include <sys/devfsext.h> 6112517Sjulian#endif /*DEVFS*/ 6212517Sjulian 6316322Sgpalmer#ifdef notyet 6412819Sphkstatic void ptyattach __P((int n)); 6516322Sgpalmer#endif 6612819Sphkstatic void ptsstart __P((struct tty *tp)); 6712819Sphkstatic void ptcwakeup __P((struct tty *tp, int flag)); 6811789Sbde 6912675Sjulianstatic d_open_t ptsopen; 7012675Sjulianstatic d_close_t ptsclose; 7112675Sjulianstatic d_read_t ptsread; 7212675Sjulianstatic d_write_t ptswrite; 7312675Sjulianstatic d_ioctl_t ptyioctl; 7412675Sjulianstatic d_stop_t ptsstop; 7512731Sbdestatic d_devtotty_t ptydevtotty; 7612675Sjulianstatic d_open_t ptcopen; 7712675Sjulianstatic d_close_t ptcclose; 7812675Sjulianstatic d_read_t ptcread; 7912675Sjulianstatic d_write_t ptcwrite; 8029354Speterstatic d_poll_t ptcpoll; 8112675Sjulian 8238485Sbde#define CDEV_MAJOR_S 5 8338485Sbdestatic struct cdevsw pts_cdevsw = { 8438485Sbde ptsopen, ptsclose, ptsread, ptswrite, 8538485Sbde ptyioctl, ptsstop, nullreset, ptydevtotty, 8638485Sbde ttpoll, nommap, NULL, "pts", 8738485Sbde NULL, -1, nodump, nopsize, 8838485Sbde D_TTY, 8938485Sbde}; 9012675Sjulian 9138485Sbde#define CDEV_MAJOR_C 6 9238485Sbdestatic struct cdevsw ptc_cdevsw = { 9338485Sbde ptcopen, ptcclose, ptcread, ptcwrite, 9438485Sbde ptyioctl, nullstop, nullreset, ptydevtotty, 9538485Sbde ptcpoll, nommap, NULL, "ptc", 9638485Sbde NULL, -1, nodump, nopsize, 9738485Sbde D_TTY, 9838485Sbde}; 9912675Sjulian 1001541Srgrimes#if NPTY == 1 1011541Srgrimes#undef NPTY 1021541Srgrimes#define NPTY 32 /* crude XXX */ 10327770Sjmg#warning You have only one pty defined, redefining to 32. 1041541Srgrimes#endif 1051541Srgrimes 10627770Sjmg#ifdef DEVFS 10727770Sjmg#define MAXUNITS (8 * 32) 10827770Sjmgstatic void *devfs_token_pts[MAXUNITS]; 10927770Sjmgstatic void *devfs_token_ptc[MAXUNITS]; 11027770Sjmgstatic const char jnames[] = "pqrsPQRS"; 11127770Sjmg#if NPTY > MAXUNITS 11227770Sjmg#undef NPTY 11327770Sjmg#define NPTY MAXUNITS 11427770Sjmg#warning Can't have more than 256 pty's with DEVFS defined. 11527770Sjmg#endif 11627770Sjmg#endif 11727770Sjmg 1181541Srgrimes#define BUFSIZ 100 /* Chunk size iomoved to/from user */ 1191541Srgrimes 1201541Srgrimes/* 12112564Sjulian * pts == /dev/tty[pqrsPQRS][0123456789abcdefghijklmnopqrstuv] 12212564Sjulian * ptc == /dev/pty[pqrsPQRS][0123456789abcdefghijklmnopqrstuv] 1231541Srgrimes */ 12412819Sphkstatic struct tty pt_tty[NPTY]; /* XXX */ 12512819Sphkstatic struct pt_ioctl { 1261541Srgrimes int pt_flags; 1271541Srgrimes struct selinfo pt_selr, pt_selw; 1281541Srgrimes u_char pt_send; 1291541Srgrimes u_char pt_ucntl; 1301541Srgrimes} pt_ioctl[NPTY]; /* XXX */ 13112819Sphkstatic int npty = NPTY; /* for pstat -t */ 1321541Srgrimes 1331541Srgrimes#define PF_PKT 0x08 /* packet mode */ 1341541Srgrimes#define PF_STOPPED 0x10 /* user told stopped */ 1351541Srgrimes#define PF_REMOTE 0x20 /* remote and flow controlled input */ 1361541Srgrimes#define PF_NOSTOP 0x40 1371541Srgrimes#define PF_UCNTL 0x80 /* user control mode */ 1381541Srgrimes 13916322Sgpalmer#ifdef notyet 1401541Srgrimes/* 1411541Srgrimes * Establish n (or default if n is 1) ptys in the system. 1421541Srgrimes * 1431541Srgrimes * XXX cdevsw & pstat require the array `pty[]' to be an array 1441541Srgrimes */ 14512819Sphkstatic void 1461541Srgrimesptyattach(n) 1471541Srgrimes int n; 1481541Srgrimes{ 1491541Srgrimes char *mem; 1501541Srgrimes register u_long ntb; 1511541Srgrimes#define DEFAULT_NPTY 32 1521541Srgrimes 1531541Srgrimes /* maybe should allow 0 => none? */ 1541541Srgrimes if (n <= 1) 1551541Srgrimes n = DEFAULT_NPTY; 1561541Srgrimes ntb = n * sizeof(struct tty); 1571541Srgrimes mem = malloc(ntb + ALIGNBYTES + n * sizeof(struct pt_ioctl), 1581541Srgrimes M_DEVBUF, M_WAITOK); 1591541Srgrimes pt_tty = (struct tty *)mem; 1601541Srgrimes mem = (char *)ALIGN(mem + ntb); 1611541Srgrimes pt_ioctl = (struct pt_ioctl *)mem; 1621541Srgrimes npty = n; 16316322Sgpalmer} 1641541Srgrimes#endif 1651541Srgrimes 1661541Srgrimes/*ARGSUSED*/ 16712675Sjulianstatic int 1681541Srgrimesptsopen(dev, flag, devtype, p) 1691541Srgrimes dev_t dev; 1701541Srgrimes int flag, devtype; 1711541Srgrimes struct proc *p; 1721541Srgrimes{ 1731541Srgrimes register struct tty *tp; 1741541Srgrimes int error; 1751541Srgrimes 1761541Srgrimes if (minor(dev) >= npty) 1771541Srgrimes return (ENXIO); 1781541Srgrimes tp = &pt_tty[minor(dev)]; 1791541Srgrimes if ((tp->t_state & TS_ISOPEN) == 0) { 1801541Srgrimes ttychars(tp); /* Set up default chars */ 1811541Srgrimes tp->t_iflag = TTYDEF_IFLAG; 1821541Srgrimes tp->t_oflag = TTYDEF_OFLAG; 1831541Srgrimes tp->t_lflag = TTYDEF_LFLAG; 1841541Srgrimes tp->t_cflag = TTYDEF_CFLAG; 1851541Srgrimes tp->t_ispeed = tp->t_ospeed = TTYDEF_SPEED; 1861541Srgrimes } else if (tp->t_state&TS_XCLUDE && p->p_ucred->cr_uid != 0) 1871541Srgrimes return (EBUSY); 1881541Srgrimes if (tp->t_oproc) /* Ctrlr still around. */ 1899824Sbde (void)(*linesw[tp->t_line].l_modem)(tp, 1); 1901541Srgrimes while ((tp->t_state & TS_CARR_ON) == 0) { 1911541Srgrimes if (flag&FNONBLOCK) 1921541Srgrimes break; 1939639Sbde error = ttysleep(tp, TSA_CARR_ON(tp), TTIPRI | PCATCH, 1949624Sbde "ptsopn", 0); 1953308Sphk if (error) 1961541Srgrimes return (error); 1971541Srgrimes } 1981541Srgrimes error = (*linesw[tp->t_line].l_open)(dev, tp); 1997724Sache if (error == 0) 2007724Sache ptcwakeup(tp, FREAD|FWRITE); 2011541Srgrimes return (error); 2021541Srgrimes} 2031541Srgrimes 20412675Sjulianstatic int 2051541Srgrimesptsclose(dev, flag, mode, p) 2061541Srgrimes dev_t dev; 2071541Srgrimes int flag, mode; 2081541Srgrimes struct proc *p; 2091541Srgrimes{ 2101541Srgrimes register struct tty *tp; 2111541Srgrimes int err; 2121541Srgrimes 2131541Srgrimes tp = &pt_tty[minor(dev)]; 2141541Srgrimes err = (*linesw[tp->t_line].l_close)(tp, flag); 2157730Sache ptsstop(tp, FREAD|FWRITE); 2167724Sache (void) ttyclose(tp); 2171541Srgrimes return (err); 2181541Srgrimes} 2191541Srgrimes 22012675Sjulianstatic int 2211541Srgrimesptsread(dev, uio, flag) 2221541Srgrimes dev_t dev; 2231541Srgrimes struct uio *uio; 2241541Srgrimes int flag; 2251541Srgrimes{ 2261541Srgrimes struct proc *p = curproc; 2271541Srgrimes register struct tty *tp = &pt_tty[minor(dev)]; 2281541Srgrimes register struct pt_ioctl *pti = &pt_ioctl[minor(dev)]; 2291541Srgrimes int error = 0; 2301541Srgrimes 2311541Srgrimesagain: 2321541Srgrimes if (pti->pt_flags & PF_REMOTE) { 2331541Srgrimes while (isbackground(p, tp)) { 2341541Srgrimes if ((p->p_sigignore & sigmask(SIGTTIN)) || 2351541Srgrimes (p->p_sigmask & sigmask(SIGTTIN)) || 2361541Srgrimes p->p_pgrp->pg_jobc == 0 || 2371541Srgrimes p->p_flag & P_PPWAIT) 2381541Srgrimes return (EIO); 2391541Srgrimes pgsignal(p->p_pgrp, SIGTTIN, 1); 2409624Sbde error = ttysleep(tp, &lbolt, TTIPRI | PCATCH, "ptsbg", 2419624Sbde 0); 2423308Sphk if (error) 2431541Srgrimes return (error); 2441541Srgrimes } 2451541Srgrimes if (tp->t_canq.c_cc == 0) { 2461541Srgrimes if (flag & IO_NDELAY) 2471541Srgrimes return (EWOULDBLOCK); 2489639Sbde error = ttysleep(tp, TSA_PTS_READ(tp), TTIPRI | PCATCH, 2499624Sbde "ptsin", 0); 2503308Sphk if (error) 2511541Srgrimes return (error); 2521541Srgrimes goto again; 2531541Srgrimes } 2541541Srgrimes while (tp->t_canq.c_cc > 1 && uio->uio_resid > 0) 2551541Srgrimes if (ureadc(getc(&tp->t_canq), uio) < 0) { 2561541Srgrimes error = EFAULT; 2571541Srgrimes break; 2581541Srgrimes } 2591541Srgrimes if (tp->t_canq.c_cc == 1) 2601541Srgrimes (void) getc(&tp->t_canq); 2611541Srgrimes if (tp->t_canq.c_cc) 2621541Srgrimes return (error); 2631541Srgrimes } else 2641541Srgrimes if (tp->t_oproc) 2651541Srgrimes error = (*linesw[tp->t_line].l_read)(tp, uio, flag); 2661541Srgrimes ptcwakeup(tp, FWRITE); 2671541Srgrimes return (error); 2681541Srgrimes} 2691541Srgrimes 2701541Srgrimes/* 2711541Srgrimes * Write to pseudo-tty. 2721541Srgrimes * Wakeups of controlling tty will happen 2731541Srgrimes * indirectly, when tty driver calls ptsstart. 2741541Srgrimes */ 27512675Sjulianstatic int 2761541Srgrimesptswrite(dev, uio, flag) 2771541Srgrimes dev_t dev; 2781541Srgrimes struct uio *uio; 2791541Srgrimes int flag; 2801541Srgrimes{ 2811541Srgrimes register struct tty *tp; 2821541Srgrimes 2831541Srgrimes tp = &pt_tty[minor(dev)]; 2841541Srgrimes if (tp->t_oproc == 0) 2851541Srgrimes return (EIO); 2861541Srgrimes return ((*linesw[tp->t_line].l_write)(tp, uio, flag)); 2871541Srgrimes} 2881541Srgrimes 2891541Srgrimes/* 2901541Srgrimes * Start output on pseudo-tty. 2911541Srgrimes * Wake up process selecting or sleeping for input from controlling tty. 2921541Srgrimes */ 29312819Sphkstatic void 2941541Srgrimesptsstart(tp) 2951541Srgrimes struct tty *tp; 2961541Srgrimes{ 2971541Srgrimes register struct pt_ioctl *pti = &pt_ioctl[minor(tp->t_dev)]; 2981541Srgrimes 2991541Srgrimes if (tp->t_state & TS_TTSTOP) 3001541Srgrimes return; 3011541Srgrimes if (pti->pt_flags & PF_STOPPED) { 3021541Srgrimes pti->pt_flags &= ~PF_STOPPED; 3031541Srgrimes pti->pt_send = TIOCPKT_START; 3041541Srgrimes } 3051541Srgrimes ptcwakeup(tp, FREAD); 3061541Srgrimes} 3071541Srgrimes 30812819Sphkstatic void 3091541Srgrimesptcwakeup(tp, flag) 3101541Srgrimes struct tty *tp; 3111541Srgrimes int flag; 3121541Srgrimes{ 3131541Srgrimes struct pt_ioctl *pti = &pt_ioctl[minor(tp->t_dev)]; 3141541Srgrimes 3151541Srgrimes if (flag & FREAD) { 3161541Srgrimes selwakeup(&pti->pt_selr); 3179639Sbde wakeup(TSA_PTC_READ(tp)); 3181541Srgrimes } 3191541Srgrimes if (flag & FWRITE) { 3201541Srgrimes selwakeup(&pti->pt_selw); 3219639Sbde wakeup(TSA_PTC_WRITE(tp)); 3221541Srgrimes } 3231541Srgrimes} 3241541Srgrimes 32512675Sjulianstatic int 3261541Srgrimesptcopen(dev, flag, devtype, p) 3271541Srgrimes dev_t dev; 3281541Srgrimes int flag, devtype; 3291541Srgrimes struct proc *p; 3301541Srgrimes{ 3311541Srgrimes register struct tty *tp; 3321541Srgrimes struct pt_ioctl *pti; 3331541Srgrimes 3341541Srgrimes if (minor(dev) >= npty) 3351541Srgrimes return (ENXIO); 3361541Srgrimes tp = &pt_tty[minor(dev)]; 3371541Srgrimes if (tp->t_oproc) 3381541Srgrimes return (EIO); 3391541Srgrimes tp->t_oproc = ptsstart; 3401541Srgrimes#ifdef sun4c 3411541Srgrimes tp->t_stop = ptsstop; 3421541Srgrimes#endif 3431541Srgrimes (void)(*linesw[tp->t_line].l_modem)(tp, 1); 3441541Srgrimes tp->t_lflag &= ~EXTPROC; 3451541Srgrimes pti = &pt_ioctl[minor(dev)]; 3461541Srgrimes pti->pt_flags = 0; 3471541Srgrimes pti->pt_send = 0; 3481541Srgrimes pti->pt_ucntl = 0; 3491541Srgrimes return (0); 3501541Srgrimes} 3511541Srgrimes 35212675Sjulianstatic int 35310624Sbdeptcclose(dev, flags, fmt, p) 3541541Srgrimes dev_t dev; 35510624Sbde int flags; 35610624Sbde int fmt; 35710624Sbde struct proc *p; 3581541Srgrimes{ 3591541Srgrimes register struct tty *tp; 3601541Srgrimes 3611541Srgrimes tp = &pt_tty[minor(dev)]; 3621541Srgrimes (void)(*linesw[tp->t_line].l_modem)(tp, 0); 3639824Sbde 3649824Sbde /* 3659824Sbde * XXX MDMBUF makes no sense for ptys but would inhibit the above 3669824Sbde * l_modem(). CLOCAL makes sense but isn't supported. Special 3679824Sbde * l_modem()s that ignore carrier drop make no sense for ptys but 3689824Sbde * may be in use because other parts of the line discipline make 3699824Sbde * sense for ptys. Recover by doing everything that a normal 3709824Sbde * ttymodem() would have done except for sending a SIGHUP. 3719824Sbde */ 3729850Sbde if (tp->t_state & TS_ISOPEN) { 3739850Sbde tp->t_state &= ~(TS_CARR_ON | TS_CONNECTED); 3749850Sbde tp->t_state |= TS_ZOMBIE; 3759850Sbde ttyflush(tp, FREAD | FWRITE); 3769850Sbde } 3779824Sbde 3781541Srgrimes tp->t_oproc = 0; /* mark closed */ 3791541Srgrimes return (0); 3801541Srgrimes} 3811541Srgrimes 38212675Sjulianstatic int 3831541Srgrimesptcread(dev, uio, flag) 3841541Srgrimes dev_t dev; 3851541Srgrimes struct uio *uio; 3861541Srgrimes int flag; 3871541Srgrimes{ 3881541Srgrimes register struct tty *tp = &pt_tty[minor(dev)]; 3891541Srgrimes struct pt_ioctl *pti = &pt_ioctl[minor(dev)]; 3901541Srgrimes char buf[BUFSIZ]; 3911541Srgrimes int error = 0, cc; 3921541Srgrimes 3931541Srgrimes /* 3941541Srgrimes * We want to block until the slave 3951541Srgrimes * is open, and there's something to read; 3961541Srgrimes * but if we lost the slave or we're NBIO, 3971541Srgrimes * then return the appropriate error instead. 3981541Srgrimes */ 3991541Srgrimes for (;;) { 4001541Srgrimes if (tp->t_state&TS_ISOPEN) { 4011541Srgrimes if (pti->pt_flags&PF_PKT && pti->pt_send) { 4021541Srgrimes error = ureadc((int)pti->pt_send, uio); 4031541Srgrimes if (error) 4041541Srgrimes return (error); 4051541Srgrimes if (pti->pt_send & TIOCPKT_IOCTL) { 4061541Srgrimes cc = min(uio->uio_resid, 4071541Srgrimes sizeof(tp->t_termios)); 4082807Sbde uiomove((caddr_t)&tp->t_termios, cc, 4092807Sbde uio); 4101541Srgrimes } 4111541Srgrimes pti->pt_send = 0; 4121541Srgrimes return (0); 4131541Srgrimes } 4141541Srgrimes if (pti->pt_flags&PF_UCNTL && pti->pt_ucntl) { 4151541Srgrimes error = ureadc((int)pti->pt_ucntl, uio); 4161541Srgrimes if (error) 4171541Srgrimes return (error); 4181541Srgrimes pti->pt_ucntl = 0; 4191541Srgrimes return (0); 4201541Srgrimes } 4211541Srgrimes if (tp->t_outq.c_cc && (tp->t_state&TS_TTSTOP) == 0) 4221541Srgrimes break; 4231541Srgrimes } 4249824Sbde if ((tp->t_state & TS_CONNECTED) == 0) 4251541Srgrimes return (0); /* EOF */ 4261541Srgrimes if (flag & IO_NDELAY) 4271541Srgrimes return (EWOULDBLOCK); 4289639Sbde error = tsleep(TSA_PTC_READ(tp), TTIPRI | PCATCH, "ptcin", 0); 4293308Sphk if (error) 4301541Srgrimes return (error); 4311541Srgrimes } 4321541Srgrimes if (pti->pt_flags & (PF_PKT|PF_UCNTL)) 4331541Srgrimes error = ureadc(0, uio); 4341541Srgrimes while (uio->uio_resid > 0 && error == 0) { 4351541Srgrimes cc = q_to_b(&tp->t_outq, buf, min(uio->uio_resid, BUFSIZ)); 4361541Srgrimes if (cc <= 0) 4371541Srgrimes break; 4381541Srgrimes error = uiomove(buf, cc, uio); 4391541Srgrimes } 4409626Sbde ttwwakeup(tp); 4411541Srgrimes return (error); 4421541Srgrimes} 4431541Srgrimes 44412675Sjulianstatic void 4451541Srgrimesptsstop(tp, flush) 4461541Srgrimes register struct tty *tp; 4471541Srgrimes int flush; 4481541Srgrimes{ 4491541Srgrimes struct pt_ioctl *pti = &pt_ioctl[minor(tp->t_dev)]; 4501541Srgrimes int flag; 4511541Srgrimes 4521541Srgrimes /* note: FLUSHREAD and FLUSHWRITE already ok */ 4531541Srgrimes if (flush == 0) { 4541541Srgrimes flush = TIOCPKT_STOP; 4551541Srgrimes pti->pt_flags |= PF_STOPPED; 4561541Srgrimes } else 4571541Srgrimes pti->pt_flags &= ~PF_STOPPED; 4581541Srgrimes pti->pt_send |= flush; 4591541Srgrimes /* change of perspective */ 4601541Srgrimes flag = 0; 4611541Srgrimes if (flush & FREAD) 4621541Srgrimes flag |= FWRITE; 4631541Srgrimes if (flush & FWRITE) 4641541Srgrimes flag |= FREAD; 4651541Srgrimes ptcwakeup(tp, flag); 4661541Srgrimes} 4671541Srgrimes 46812675Sjulianstatic int 46929354Speterptcpoll(dev, events, p) 4701541Srgrimes dev_t dev; 47129354Speter int events; 4721541Srgrimes struct proc *p; 4731541Srgrimes{ 4741541Srgrimes register struct tty *tp = &pt_tty[minor(dev)]; 4751541Srgrimes struct pt_ioctl *pti = &pt_ioctl[minor(dev)]; 47629354Speter int revents = 0; 4771541Srgrimes int s; 4781541Srgrimes 4799824Sbde if ((tp->t_state & TS_CONNECTED) == 0) 48029354Speter return (seltrue(dev, events, p) | POLLHUP); 4811541Srgrimes 48229354Speter /* 48329354Speter * Need to block timeouts (ttrstart). 48429354Speter */ 48529354Speter s = spltty(); 4861541Srgrimes 48729354Speter if (events & (POLLIN | POLLRDNORM)) 48829354Speter if ((tp->t_state & TS_ISOPEN) && 48929354Speter ((tp->t_outq.c_cc && (tp->t_state & TS_TTSTOP) == 0) || 49029354Speter ((pti->pt_flags & PF_PKT) && pti->pt_send) || 49129354Speter ((pti->pt_flags & PF_UCNTL) && pti->pt_ucntl))) 49229354Speter revents |= events & (POLLIN | POLLRDNORM); 4931541Srgrimes 49429354Speter if (events & (POLLOUT | POLLWRNORM)) 49529354Speter if (tp->t_state & TS_ISOPEN && 49629354Speter ((pti->pt_flags & PF_REMOTE) ? 49729354Speter (tp->t_canq.c_cc == 0) : 49829354Speter ((tp->t_rawq.c_cc + tp->t_canq.c_cc < TTYHOG - 2) || 49929354Speter (tp->t_canq.c_cc == 0 && (tp->t_iflag & ICANON))))) 50029354Speter revents |= events & (POLLOUT | POLLWRNORM); 5011541Srgrimes 50229354Speter if (events & POLLHUP) 50329354Speter if ((tp->t_state & TS_CARR_ON) == 0) 50429354Speter revents |= POLLHUP; 5051541Srgrimes 50629354Speter if (revents == 0) { 50729354Speter if (events & (POLLIN | POLLRDNORM)) 50829354Speter selrecord(p, &pti->pt_selr); 50929354Speter 51029354Speter if (events & (POLLOUT | POLLWRNORM)) 51129354Speter selrecord(p, &pti->pt_selw); 5121541Srgrimes } 51329354Speter splx(s); 51429354Speter 51529354Speter return (revents); 5161541Srgrimes} 5171541Srgrimes 51812675Sjulianstatic int 5191541Srgrimesptcwrite(dev, uio, flag) 5201541Srgrimes dev_t dev; 5211541Srgrimes register struct uio *uio; 5221541Srgrimes int flag; 5231541Srgrimes{ 5241541Srgrimes register struct tty *tp = &pt_tty[minor(dev)]; 5251549Srgrimes register u_char *cp = 0; 5261541Srgrimes register int cc = 0; 5271541Srgrimes u_char locbuf[BUFSIZ]; 5281541Srgrimes int cnt = 0; 5291541Srgrimes struct pt_ioctl *pti = &pt_ioctl[minor(dev)]; 5301541Srgrimes int error = 0; 5311541Srgrimes 5321541Srgrimesagain: 5331541Srgrimes if ((tp->t_state&TS_ISOPEN) == 0) 5341541Srgrimes goto block; 5351541Srgrimes if (pti->pt_flags & PF_REMOTE) { 5361541Srgrimes if (tp->t_canq.c_cc) 5371541Srgrimes goto block; 53811789Sbde while ((uio->uio_resid > 0 || cc > 0) && 53911789Sbde tp->t_canq.c_cc < TTYHOG - 1) { 5401541Srgrimes if (cc == 0) { 5411541Srgrimes cc = min(uio->uio_resid, BUFSIZ); 5421541Srgrimes cc = min(cc, TTYHOG - 1 - tp->t_canq.c_cc); 5431541Srgrimes cp = locbuf; 5441541Srgrimes error = uiomove((caddr_t)cp, cc, uio); 5451541Srgrimes if (error) 5461541Srgrimes return (error); 5471541Srgrimes /* check again for safety */ 54811789Sbde if ((tp->t_state & TS_ISOPEN) == 0) { 54911789Sbde /* adjust as usual */ 55011789Sbde uio->uio_resid += cc; 5511541Srgrimes return (EIO); 55211789Sbde } 5531541Srgrimes } 55415199Sbde if (cc > 0) { 55515199Sbde cc = b_to_q((char *)cp, cc, &tp->t_canq); 55615199Sbde /* 55715199Sbde * XXX we don't guarantee that the canq size 55815199Sbde * is >= TTYHOG, so the above b_to_q() may 55915199Sbde * leave some bytes uncopied. However, space 56015199Sbde * is guaranteed for the null terminator if 56115199Sbde * we don't fail here since (TTYHOG - 1) is 56215199Sbde * not a multiple of CBSIZE. 56315199Sbde */ 56415199Sbde if (cc > 0) 56515199Sbde break; 56615199Sbde } 5671541Srgrimes } 56811789Sbde /* adjust for data copied in but not written */ 56911789Sbde uio->uio_resid += cc; 5701541Srgrimes (void) putc(0, &tp->t_canq); 5711541Srgrimes ttwakeup(tp); 5729639Sbde wakeup(TSA_PTS_READ(tp)); 5731541Srgrimes return (0); 5741541Srgrimes } 57511789Sbde while (uio->uio_resid > 0 || cc > 0) { 5761541Srgrimes if (cc == 0) { 5771541Srgrimes cc = min(uio->uio_resid, BUFSIZ); 5781541Srgrimes cp = locbuf; 5791541Srgrimes error = uiomove((caddr_t)cp, cc, uio); 5801541Srgrimes if (error) 5811541Srgrimes return (error); 5821541Srgrimes /* check again for safety */ 58311789Sbde if ((tp->t_state & TS_ISOPEN) == 0) { 58411789Sbde /* adjust for data copied in but not written */ 58511789Sbde uio->uio_resid += cc; 5861541Srgrimes return (EIO); 58711789Sbde } 5881541Srgrimes } 5891541Srgrimes while (cc > 0) { 5901541Srgrimes if ((tp->t_rawq.c_cc + tp->t_canq.c_cc) >= TTYHOG - 2 && 5911541Srgrimes (tp->t_canq.c_cc > 0 || !(tp->t_iflag&ICANON))) { 5929824Sbde wakeup(TSA_HUP_OR_INPUT(tp)); 5931541Srgrimes goto block; 5941541Srgrimes } 5951541Srgrimes (*linesw[tp->t_line].l_rint)(*cp++, tp); 5961541Srgrimes cnt++; 5971541Srgrimes cc--; 5981541Srgrimes } 5991541Srgrimes cc = 0; 6001541Srgrimes } 6011541Srgrimes return (0); 6021541Srgrimesblock: 6031541Srgrimes /* 6041541Srgrimes * Come here to wait for slave to open, for space 60515199Sbde * in outq, or space in rawq, or an empty canq. 6061541Srgrimes */ 60711789Sbde if ((tp->t_state & TS_CONNECTED) == 0) { 60811789Sbde /* adjust for data copied in but not written */ 60911789Sbde uio->uio_resid += cc; 6101541Srgrimes return (EIO); 61111789Sbde } 6121541Srgrimes if (flag & IO_NDELAY) { 6131541Srgrimes /* adjust for data copied in but not written */ 6141541Srgrimes uio->uio_resid += cc; 6151541Srgrimes if (cnt == 0) 6161541Srgrimes return (EWOULDBLOCK); 6171541Srgrimes return (0); 6181541Srgrimes } 6199639Sbde error = tsleep(TSA_PTC_WRITE(tp), TTOPRI | PCATCH, "ptcout", 0); 6203308Sphk if (error) { 6211541Srgrimes /* adjust for data copied in but not written */ 6221541Srgrimes uio->uio_resid += cc; 6231541Srgrimes return (error); 6241541Srgrimes } 6251541Srgrimes goto again; 6261541Srgrimes} 6271541Srgrimes 62812675Sjulianstatic struct tty * 6296712Spstptydevtotty(dev) 6306712Spst dev_t dev; 6316712Spst{ 6326712Spst if (minor(dev) >= npty) 6336712Spst return (NULL); 6346712Spst 6356712Spst return &pt_tty[minor(dev)]; 6366712Spst} 6376712Spst 6381541Srgrimes/*ARGSUSED*/ 63912675Sjulianstatic int 6401541Srgrimesptyioctl(dev, cmd, data, flag, p) 6411541Srgrimes dev_t dev; 64236735Sdfr u_long cmd; 6431541Srgrimes caddr_t data; 6441541Srgrimes int flag; 6451541Srgrimes struct proc *p; 6461541Srgrimes{ 6471541Srgrimes register struct tty *tp = &pt_tty[minor(dev)]; 6481541Srgrimes register struct pt_ioctl *pti = &pt_ioctl[minor(dev)]; 6491541Srgrimes register u_char *cc = tp->t_cc; 6501541Srgrimes int stop, error; 6511541Srgrimes 6521541Srgrimes /* 6531541Srgrimes * IF CONTROLLER STTY THEN MUST FLUSH TO PREVENT A HANG. 6541541Srgrimes * ttywflush(tp) will hang if there are characters in the outq. 6551541Srgrimes */ 6561541Srgrimes if (cmd == TIOCEXT) { 6571541Srgrimes /* 6581541Srgrimes * When the EXTPROC bit is being toggled, we need 6591541Srgrimes * to send an TIOCPKT_IOCTL if the packet driver 6601541Srgrimes * is turned on. 6611541Srgrimes */ 6621541Srgrimes if (*(int *)data) { 6631541Srgrimes if (pti->pt_flags & PF_PKT) { 6641541Srgrimes pti->pt_send |= TIOCPKT_IOCTL; 6651541Srgrimes ptcwakeup(tp, FREAD); 6661541Srgrimes } 6671541Srgrimes tp->t_lflag |= EXTPROC; 6681541Srgrimes } else { 66914511Shsu if ((tp->t_lflag & EXTPROC) && 6701541Srgrimes (pti->pt_flags & PF_PKT)) { 6711541Srgrimes pti->pt_send |= TIOCPKT_IOCTL; 6721541Srgrimes ptcwakeup(tp, FREAD); 6731541Srgrimes } 6741541Srgrimes tp->t_lflag &= ~EXTPROC; 6751541Srgrimes } 6761541Srgrimes return(0); 6771541Srgrimes } else 67812813Sjulian if (cdevsw[major(dev)]->d_open == ptcopen) 6791541Srgrimes switch (cmd) { 6801541Srgrimes 6811541Srgrimes case TIOCGPGRP: 6821541Srgrimes /* 68333826Sbde * We avoid calling ttioctl on the controller since, 6841541Srgrimes * in that case, tp must be the controlling terminal. 6851541Srgrimes */ 6861541Srgrimes *(int *)data = tp->t_pgrp ? tp->t_pgrp->pg_id : 0; 6871541Srgrimes return (0); 6881541Srgrimes 6891541Srgrimes case TIOCPKT: 6901541Srgrimes if (*(int *)data) { 6911541Srgrimes if (pti->pt_flags & PF_UCNTL) 6921541Srgrimes return (EINVAL); 6931541Srgrimes pti->pt_flags |= PF_PKT; 6941541Srgrimes } else 6951541Srgrimes pti->pt_flags &= ~PF_PKT; 6961541Srgrimes return (0); 6971541Srgrimes 6981541Srgrimes case TIOCUCNTL: 6991541Srgrimes if (*(int *)data) { 7001541Srgrimes if (pti->pt_flags & PF_PKT) 7011541Srgrimes return (EINVAL); 7021541Srgrimes pti->pt_flags |= PF_UCNTL; 7031541Srgrimes } else 7041541Srgrimes pti->pt_flags &= ~PF_UCNTL; 7051541Srgrimes return (0); 7061541Srgrimes 7071541Srgrimes case TIOCREMOTE: 7081541Srgrimes if (*(int *)data) 7091541Srgrimes pti->pt_flags |= PF_REMOTE; 7101541Srgrimes else 7111541Srgrimes pti->pt_flags &= ~PF_REMOTE; 7121541Srgrimes ttyflush(tp, FREAD|FWRITE); 7131541Srgrimes return (0); 7141541Srgrimes 7151541Srgrimes#ifdef COMPAT_43 7168876Srgrimes case TIOCSETP: 7171541Srgrimes case TIOCSETN: 7181541Srgrimes#endif 7191541Srgrimes case TIOCSETD: 7201541Srgrimes case TIOCSETA: 7211541Srgrimes case TIOCSETAW: 7229858Sache case TIOCSETAF: 7231541Srgrimes ndflush(&tp->t_outq, tp->t_outq.c_cc); 7241541Srgrimes break; 7251541Srgrimes 7261541Srgrimes case TIOCSIG: 72727770Sjmg if (*(unsigned int *)data >= NSIG || 72827770Sjmg *(unsigned int *)data == 0) 7291541Srgrimes return(EINVAL); 7301541Srgrimes if ((tp->t_lflag&NOFLSH) == 0) 7311541Srgrimes ttyflush(tp, FREAD|FWRITE); 7321541Srgrimes pgsignal(tp->t_pgrp, *(unsigned int *)data, 1); 7331541Srgrimes if ((*(unsigned int *)data == SIGINFO) && 7341541Srgrimes ((tp->t_lflag&NOKERNINFO) == 0)) 7351541Srgrimes ttyinfo(tp); 7361541Srgrimes return(0); 7371541Srgrimes } 7381541Srgrimes error = (*linesw[tp->t_line].l_ioctl)(tp, cmd, data, flag, p); 73931577Sbde if (error == ENOIOCTL) 7401541Srgrimes error = ttioctl(tp, cmd, data, flag); 74131577Sbde if (error == ENOIOCTL) { 7421541Srgrimes if (pti->pt_flags & PF_UCNTL && 7431541Srgrimes (cmd & ~0xff) == UIOCCMD(0)) { 7441541Srgrimes if (cmd & 0xff) { 7451541Srgrimes pti->pt_ucntl = (u_char)cmd; 7461541Srgrimes ptcwakeup(tp, FREAD); 7471541Srgrimes } 7481541Srgrimes return (0); 7491541Srgrimes } 7501541Srgrimes error = ENOTTY; 7511541Srgrimes } 7521541Srgrimes /* 7531541Srgrimes * If external processing and packet mode send ioctl packet. 7541541Srgrimes */ 7551541Srgrimes if ((tp->t_lflag&EXTPROC) && (pti->pt_flags & PF_PKT)) { 7561541Srgrimes switch(cmd) { 7571541Srgrimes case TIOCSETA: 7581541Srgrimes case TIOCSETAW: 7591541Srgrimes case TIOCSETAF: 7601541Srgrimes#ifdef COMPAT_43 7611541Srgrimes case TIOCSETP: 7621541Srgrimes case TIOCSETN: 7631541Srgrimes#endif 7641541Srgrimes#if defined(COMPAT_43) || defined(COMPAT_SUNOS) 7651541Srgrimes case TIOCSETC: 7661541Srgrimes case TIOCSLTC: 7671541Srgrimes case TIOCLBIS: 7681541Srgrimes case TIOCLBIC: 7691541Srgrimes case TIOCLSET: 7701541Srgrimes#endif 7711541Srgrimes pti->pt_send |= TIOCPKT_IOCTL; 7721541Srgrimes ptcwakeup(tp, FREAD); 7731541Srgrimes default: 7741541Srgrimes break; 7751541Srgrimes } 7761541Srgrimes } 7778876Srgrimes stop = (tp->t_iflag & IXON) && CCEQ(cc[VSTOP], CTRL('s')) 7781541Srgrimes && CCEQ(cc[VSTART], CTRL('q')); 7791541Srgrimes if (pti->pt_flags & PF_NOSTOP) { 7801541Srgrimes if (stop) { 7811541Srgrimes pti->pt_send &= ~TIOCPKT_NOSTOP; 7821541Srgrimes pti->pt_send |= TIOCPKT_DOSTOP; 7831541Srgrimes pti->pt_flags &= ~PF_NOSTOP; 7841541Srgrimes ptcwakeup(tp, FREAD); 7851541Srgrimes } 7861541Srgrimes } else { 7871541Srgrimes if (!stop) { 7881541Srgrimes pti->pt_send &= ~TIOCPKT_DOSTOP; 7891541Srgrimes pti->pt_send |= TIOCPKT_NOSTOP; 7901541Srgrimes pti->pt_flags |= PF_NOSTOP; 7911541Srgrimes ptcwakeup(tp, FREAD); 7921541Srgrimes } 7931541Srgrimes } 7941541Srgrimes return (error); 7951541Srgrimes} 79612517Sjulian 79733826Sbdestatic int ptc_devsw_installed; 79812517Sjulian 79929506Sbdestatic void ptc_drvinit __P((void *unused)); 80012675Sjulianstatic void 80129506Sbdeptc_drvinit(unused) 80229506Sbde void *unused; 80312517Sjulian{ 80412517Sjulian#ifdef DEVFS 80512567Sjulian int i,j,k; 80612517Sjulian#endif 80712517Sjulian dev_t dev; 80812517Sjulian 80912517Sjulian if( ! ptc_devsw_installed ) { 81012675Sjulian dev = makedev(CDEV_MAJOR_S, 0); 81112675Sjulian cdevsw_add(&dev, &pts_cdevsw, NULL); 81212675Sjulian dev = makedev(CDEV_MAJOR_C, 0); 81312675Sjulian cdevsw_add(&dev, &ptc_cdevsw, NULL); 81412517Sjulian ptc_devsw_installed = 1; 81512517Sjulian#ifdef DEVFS 81612521Sjulian for ( i = 0 ; i<NPTY ; i++ ) { 81712564Sjulian j = i / 32; 81812564Sjulian k = i % 32; 81912675Sjulian devfs_token_pts[i] = 82013630Sphk devfs_add_devswf(&pts_cdevsw,i, 82113630Sphk DV_CHR,0,0,0666, 82237683Sbde "tty%c%r",jnames[j],k); 82312675Sjulian devfs_token_ptc[i] = 82413630Sphk devfs_add_devswf(&ptc_cdevsw,i, 82513630Sphk DV_CHR,0,0,0666, 82637683Sbde "pty%c%r",jnames[j],k); 82712521Sjulian } 82812521Sjulian#endif 82912517Sjulian } 83012517Sjulian} 83112517Sjulian 83212517SjulianSYSINIT(ptcdev,SI_SUB_DRIVERS,SI_ORDER_MIDDLE+CDEV_MAJOR_C,ptc_drvinit,NULL) 833