/* * Copyright (c) 1997-2006 Apple Computer, Inc. All rights reserved. * * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ * * This file contains Original Code and/or Modifications of Original Code * as defined in and that are subject to the Apple Public Source License * Version 2.0 (the 'License'). You may not use this file except in * compliance with the License. The rights granted to you under the License * may not be used to create, or enable the creation or redistribution of, * unlawful or unlicensed copies of an Apple operating system, or to * circumvent, violate, or enable the circumvention or violation of, any * terms of an Apple operating system software license agreement. * * Please obtain a copy of the License at * http://www.opensource.apple.com/apsl/ and read it before using this file. * * The Original Code and all software distributed under the License are * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. * Please see the License for the specific language governing rights and * limitations under the License. * * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ */ /* * Copyright (c) 1982, 1986, 1989, 1993 * The Regents of the University of California. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 4. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * @(#)tty_pty.c 8.4 (Berkeley) 2/20/95 */ /* * Pseudo-teletype Driver * (Actually two drivers, requiring two entries in 'cdevsw') */ #include "pty.h" /* XXX */ #include #include #include #include #include #include #include #include #include #include #include #include #include #define d_devtotty_t struct tty ** #ifdef d_stop_t #undef d_stop_t #endif typedef void d_stop_t(struct tty *tp, int rw); /* XXX function should be removed??? */ int pty_init(int n_ptys); /* XXX should be a devfs function */ int _devfs_setattr(void * handle, unsigned short mode, uid_t uid, gid_t gid); static void ptsstart(struct tty *tp); static void ptcwakeup(struct tty *tp, int flag); __private_extern__ d_open_t ptsopen; __private_extern__ d_close_t ptsclose; __private_extern__ d_read_t ptsread; __private_extern__ d_write_t ptswrite; __private_extern__ d_ioctl_t ptyioctl; __private_extern__ d_stop_t ptsstop; __private_extern__ d_devtotty_t ptydevtotty; __private_extern__ d_open_t ptcopen; __private_extern__ d_close_t ptcclose; __private_extern__ d_read_t ptcread; __private_extern__ d_write_t ptcwrite; __private_extern__ d_select_t ptcselect; #if NPTY == 1 #undef NPTY #define NPTY 32 /* crude XXX */ #warning You have only one pty defined, redefining to 32. #endif #define BUFSIZ 100 /* Chunk size iomoved to/from user */ /* * pts == /dev/tty[pqrsPQRS][0123456789abcdefghijklmnopqrstuv] * ptc == /dev/pty[pqrsPQRS][0123456789abcdefghijklmnopqrstuv] */ /* All references to have been changed to indirections in the file */ __private_extern__ struct tty *pt_tty[NPTY] = { NULL }; static struct pt_ioctl { int pt_flags; struct selinfo pt_selr, pt_selw; u_char pt_send; u_char pt_ucntl; void *pt_devhandle; /* slave device handle for grantpt() */ } pt_ioctl[NPTY]; /* XXX */ static int npty = NPTY; /* for pstat -t */ #define PF_PKT 0x08 /* packet mode */ #define PF_STOPPED 0x10 /* user told stopped */ #define PF_REMOTE 0x20 /* remote and flow controlled input */ #define PF_NOSTOP 0x40 #define PF_UCNTL 0x80 /* user control mode */ #ifndef DEVFS int pty_init(__unused int n_ptys) { return 0; } #else #include #define START_CHAR 'p' #define HEX_BASE 16 int pty_init(int n_ptys) { int i; int j; /* create the pseudo tty device nodes */ for (j = 0; j < 10; j++) { for (i = 0; i < HEX_BASE; i++) { int m = j * HEX_BASE + i; if (m == n_ptys) goto done; pt_ioctl[m].pt_devhandle = devfs_make_node(makedev(4, m), DEVFS_CHAR, UID_ROOT, GID_WHEEL, 0666, "tty%c%x", j + START_CHAR, i); (void)devfs_make_node(makedev(5, m), DEVFS_CHAR, UID_ROOT, GID_WHEEL, 0666, "pty%c%x", j + START_CHAR, i); } } done: return (0); } #endif /* DEVFS */ __private_extern__ int ptsopen(dev_t dev, int flag, __unused int devtype, __unused struct proc *p) { struct tty *tp; int error; boolean_t funnel_state; funnel_state = thread_funnel_set(kernel_flock, TRUE); /* * You will see this sort of code coming up in diffs later both * the ttymalloc and the tp indirection. */ if (minor(dev) >= npty) { error = ENXIO; goto out; } if (!pt_tty[minor(dev)]) { /* * If we can't allocate a new one, act as if we had run out * of device nodes. */ if ((tp = pt_tty[minor(dev)] = ttymalloc()) == NULL) { error = ENXIO; goto out; } } else tp = pt_tty[minor(dev)]; if ((tp->t_state & TS_ISOPEN) == 0) { ttychars(tp); /* Set up default chars */ tp->t_iflag = TTYDEF_IFLAG; tp->t_oflag = TTYDEF_OFLAG; tp->t_lflag = TTYDEF_LFLAG; tp->t_cflag = TTYDEF_CFLAG; tp->t_ispeed = tp->t_ospeed = TTYDEF_SPEED; ttsetwater(tp); /* would be done in xxparam() */ } else if (tp->t_state&TS_XCLUDE && suser(kauth_cred_get(), NULL)) { error = EBUSY; goto out; } if (tp->t_oproc) /* Ctrlr still around. */ (void)(*linesw[tp->t_line].l_modem)(tp, 1); while ((tp->t_state & TS_CARR_ON) == 0) { if (flag&FNONBLOCK) break; error = ttysleep(tp, TSA_CARR_ON(tp), TTIPRI | PCATCH, "ptsopn", 0); if (error) goto out; } error = (*linesw[tp->t_line].l_open)(dev, tp); if (error == 0) ptcwakeup(tp, FREAD|FWRITE); out: (void) thread_funnel_set(kernel_flock, funnel_state); return (error); } __private_extern__ int ptsclose(dev_t dev, int flag, __unused int mode, __unused proc_t p) { struct tty *tp; int err; boolean_t funnel_state; /* * This is temporary until the VSX conformance tests * are fixed. They are hanging with a deadlock * where close(pts) will not complete without t_timeout set */ #define FIX_VSX_HANG 1 #ifdef FIX_VSX_HANG int save_timeout; #endif funnel_state = thread_funnel_set(kernel_flock, TRUE); tp = pt_tty[minor(dev)]; #ifdef FIX_VSX_HANG save_timeout = tp->t_timeout; tp->t_timeout = 60; #endif err = (*linesw[tp->t_line].l_close)(tp, flag); ptsstop(tp, FREAD|FWRITE); (void) ttyclose(tp); #ifdef FIX_VSX_HANG tp->t_timeout = save_timeout; #endif (void) thread_funnel_set(kernel_flock, funnel_state); return (err); } __private_extern__ int ptsread(dev_t dev, struct uio *uio, int flag) { struct proc *p = current_proc(); struct tty *tp = pt_tty[minor(dev)]; struct pt_ioctl *pti = &pt_ioctl[minor(dev)]; int error = 0; struct uthread *ut; boolean_t funnel_state; struct pgrp *pg; funnel_state = thread_funnel_set(kernel_flock, TRUE); ut = (struct uthread *)get_bsdthread_info(current_thread()); again: if (pti->pt_flags & PF_REMOTE) { while (isbackground(p, tp)) { if ((p->p_sigignore & sigmask(SIGTTIN)) || (ut->uu_sigmask & sigmask(SIGTTIN)) || p->p_lflag & P_LPPWAIT) { error = EIO; goto out; } pg = proc_pgrp(p); if (pg == PGRP_NULL) { error = EIO; goto out; } if (pg->pg_jobc == 0) { pg_rele(pg); error = EIO; goto out; } pgsignal(pg, SIGTTIN, 1); pg_rele(pg); error = ttysleep(tp, &lbolt, TTIPRI | PCATCH | PTTYBLOCK, "ptsbg", 0); if (error) goto out; } if (tp->t_canq.c_cc == 0) { if (flag & IO_NDELAY) return (EWOULDBLOCK); error = ttysleep(tp, TSA_PTS_READ(tp), TTIPRI | PCATCH, "ptsin", 0); if (error) goto out; goto again; } while (tp->t_canq.c_cc > 1 && uio_resid(uio) > 0) { int cc; char buf[BUFSIZ]; cc = min(uio_resid(uio), BUFSIZ); // Don't copy the very last byte cc = min(cc, tp->t_canq.c_cc - 1); cc = q_to_b(&tp->t_canq, (u_char *)buf, cc); error = uiomove(buf, cc, uio); if (error) break; } if (tp->t_canq.c_cc == 1) (void) getc(&tp->t_canq); if (tp->t_canq.c_cc) goto out; } else if (tp->t_oproc) error = (*linesw[tp->t_line].l_read)(tp, uio, flag); ptcwakeup(tp, FWRITE); out: (void) thread_funnel_set(kernel_flock, funnel_state); return (error); } /* * Write to pseudo-tty. * Wakeups of controlling tty will happen * indirectly, when tty driver calls ptsstart. */ __private_extern__ int ptswrite(dev_t dev, struct uio *uio, int flag) { struct tty *tp; int error; boolean_t funnel_state; funnel_state = thread_funnel_set(kernel_flock, TRUE); tp = pt_tty[minor(dev)]; if (tp->t_oproc == 0) error = EIO; else error = (*linesw[tp->t_line].l_write)(tp, uio, flag); (void) thread_funnel_set(kernel_flock, funnel_state); return (error); } /* * Start output on pseudo-tty. * Wake up process selecting or sleeping for input from controlling tty. */ static void ptsstart(struct tty *tp) { struct pt_ioctl *pti = &pt_ioctl[minor(tp->t_dev)]; boolean_t funnel_state; funnel_state = thread_funnel_set(kernel_flock, TRUE); if (tp->t_state & TS_TTSTOP) goto out; if (pti->pt_flags & PF_STOPPED) { pti->pt_flags &= ~PF_STOPPED; pti->pt_send = TIOCPKT_START; } ptcwakeup(tp, FREAD); out: (void) thread_funnel_set(kernel_flock, funnel_state); return; } static void ptcwakeup(struct tty *tp, int flag) { struct pt_ioctl *pti = &pt_ioctl[minor(tp->t_dev)]; boolean_t funnel_state; funnel_state = thread_funnel_set(kernel_flock, TRUE); if (flag & FREAD) { selwakeup(&pti->pt_selr); wakeup(TSA_PTC_READ(tp)); } if (flag & FWRITE) { selwakeup(&pti->pt_selw); wakeup(TSA_PTC_WRITE(tp)); } (void) thread_funnel_set(kernel_flock, funnel_state); } __private_extern__ int ptcopen(dev_t dev, __unused int flag, __unused int devtype, __unused proc_t p) { struct tty *tp; struct pt_ioctl *pti; int error = 0; boolean_t funnel_state; funnel_state = thread_funnel_set(kernel_flock, TRUE); if (minor(dev) >= npty) { error = ENXIO; goto out; } if(!pt_tty[minor(dev)]) { tp = pt_tty[minor(dev)] = ttymalloc(); } else tp = pt_tty[minor(dev)]; /* If master is open OR slave is still draining, pty is still busy */ if (tp->t_oproc || (tp->t_state & TS_ISOPEN)) { error = EBUSY; goto out; } tp->t_oproc = ptsstart; CLR(tp->t_state, TS_ZOMBIE); #ifdef sun4c tp->t_stop = ptsstop; #endif (void)(*linesw[tp->t_line].l_modem)(tp, 1); tp->t_lflag &= ~EXTPROC; pti = &pt_ioctl[minor(dev)]; pti->pt_flags = 0; pti->pt_send = 0; pti->pt_ucntl = 0; out: (void) thread_funnel_set(kernel_flock, funnel_state); return (error); } __private_extern__ int ptcclose(dev_t dev, __unused int flags, __unused int fmt, __unused proc_t p) { struct tty *tp; boolean_t funnel_state; funnel_state = thread_funnel_set(kernel_flock, TRUE); tp = pt_tty[minor(dev)]; (void)(*linesw[tp->t_line].l_modem)(tp, 0); /* * XXX MDMBUF makes no sense for ptys but would inhibit the above * l_modem(). CLOCAL makes sense but isn't supported. Special * l_modem()s that ignore carrier drop make no sense for ptys but * may be in use because other parts of the line discipline make * sense for ptys. Recover by doing everything that a normal * ttymodem() would have done except for sending a SIGHUP. */ if (tp->t_state & TS_ISOPEN) { tp->t_state &= ~(TS_CARR_ON | TS_CONNECTED); tp->t_state |= TS_ZOMBIE; ttyflush(tp, FREAD | FWRITE); } tp->t_oproc = 0; /* mark closed */ (void) thread_funnel_set(kernel_flock, funnel_state); return (0); } __private_extern__ int ptcread(dev_t dev, struct uio *uio, int flag) { struct tty *tp = pt_tty[minor(dev)]; struct pt_ioctl *pti = &pt_ioctl[minor(dev)]; char buf[BUFSIZ]; int error = 0, cc; boolean_t funnel_state; funnel_state = thread_funnel_set(kernel_flock, TRUE); /* * We want to block until the slave * is open, and there's something to read; * but if we lost the slave or we're NBIO, * then return the appropriate error instead. */ for (;;) { if (tp->t_state&TS_ISOPEN) { if (pti->pt_flags&PF_PKT && pti->pt_send) { error = ureadc((int)pti->pt_send, uio); if (error) goto out; if (pti->pt_send & TIOCPKT_IOCTL) { cc = min(uio_resid(uio), sizeof(tp->t_termios)); uiomove((caddr_t)&tp->t_termios, cc, uio); } pti->pt_send = 0; goto out; } if (pti->pt_flags&PF_UCNTL && pti->pt_ucntl) { error = ureadc((int)pti->pt_ucntl, uio); if (error) goto out; pti->pt_ucntl = 0; goto out; } if (tp->t_outq.c_cc && (tp->t_state&TS_TTSTOP) == 0) break; } if ((tp->t_state & TS_CONNECTED) == 0) goto out; /* EOF */ if (flag & IO_NDELAY) { error = EWOULDBLOCK; goto out; } error = tsleep(TSA_PTC_READ(tp), TTIPRI | PCATCH, "ptcin", 0); if (error) goto out; } if (pti->pt_flags & (PF_PKT|PF_UCNTL)) error = ureadc(0, uio); while (uio_resid(uio) > 0 && error == 0) { cc = q_to_b(&tp->t_outq, (u_char *)buf, min(uio_resid(uio), BUFSIZ)); if (cc <= 0) break; error = uiomove(buf, cc, uio); } (*linesw[tp->t_line].l_start)(tp); out: (void) thread_funnel_set(kernel_flock, funnel_state); return (error); } __private_extern__ void ptsstop(struct tty *tp, int flush) { struct pt_ioctl *pti = &pt_ioctl[minor(tp->t_dev)]; int flag; boolean_t funnel_state; funnel_state = thread_funnel_set(kernel_flock, TRUE); /* note: FLUSHREAD and FLUSHWRITE already ok */ if (flush == 0) { flush = TIOCPKT_STOP; pti->pt_flags |= PF_STOPPED; } else pti->pt_flags &= ~PF_STOPPED; pti->pt_send |= flush; /* change of perspective */ flag = 0; if (flush & FREAD) flag |= FWRITE; if (flush & FWRITE) flag |= FREAD; ptcwakeup(tp, flag); (void) thread_funnel_set(kernel_flock, funnel_state); } __private_extern__ int ptcselect(dev_t dev, int rw, void *wql, struct proc *p) { struct tty *tp = pt_tty[minor(dev)]; struct pt_ioctl *pti = &pt_ioctl[minor(dev)]; int retval = 0; boolean_t funnel_state; funnel_state = thread_funnel_set(kernel_flock, TRUE); if ((tp->t_state & TS_CONNECTED) == 0) { retval = 1; goto out; } switch (rw) { case FREAD: /* * Need to block timeouts (ttrstart). */ if ((tp->t_state&TS_ISOPEN) && tp->t_outq.c_cc && (tp->t_state&TS_TTSTOP) == 0) { retval = 1; goto out; } /* FALLTHROUGH */ case 0: /* exceptional */ if ((tp->t_state&TS_ISOPEN) && ((pti->pt_flags&PF_PKT && pti->pt_send) || (pti->pt_flags&PF_UCNTL && pti->pt_ucntl))) { retval = 1; goto out; } selrecord(p, &pti->pt_selr, wql); break; case FWRITE: if (tp->t_state&TS_ISOPEN) { if (pti->pt_flags & PF_REMOTE) { if (tp->t_canq.c_cc == 0) { retval = 1; goto out; } } else { if (tp->t_rawq.c_cc + tp->t_canq.c_cc < TTYHOG-2) { retval = 1; goto out; } if (tp->t_canq.c_cc == 0 && (tp->t_lflag&ICANON)) { retval = 1; goto out; } } } selrecord(p, &pti->pt_selw, wql); break; } out: (void) thread_funnel_set(kernel_flock, funnel_state); return (retval); } __private_extern__ int ptcwrite(dev_t dev, struct uio *uio, int flag) { struct tty *tp = pt_tty[minor(dev)]; u_char *cp = NULL; int cc = 0; u_char locbuf[BUFSIZ]; int wcnt = 0; struct pt_ioctl *pti = &pt_ioctl[minor(dev)]; int error = 0; boolean_t funnel_state; funnel_state = thread_funnel_set(kernel_flock, TRUE); again: if ((tp->t_state&TS_ISOPEN) == 0) goto block; if (pti->pt_flags & PF_REMOTE) { if (tp->t_canq.c_cc) goto block; while ((uio_resid(uio) > 0 || cc > 0) && tp->t_canq.c_cc < TTYHOG - 1) { if (cc == 0) { cc = min(uio_resid(uio), BUFSIZ); cc = min(cc, TTYHOG - 1 - tp->t_canq.c_cc); cp = locbuf; error = uiomove((caddr_t)cp, cc, uio); if (error) goto out; /* check again for safety */ if ((tp->t_state & TS_ISOPEN) == 0) { /* adjust as usual */ uio_setresid(uio, (uio_resid(uio) + cc)); error = EIO; goto out; } } if (cc > 0) { cc = b_to_q((u_char *)cp, cc, &tp->t_canq); /* * XXX we don't guarantee that the canq size * is >= TTYHOG, so the above b_to_q() may * leave some bytes uncopied. However, space * is guaranteed for the null terminator if * we don't fail here since (TTYHOG - 1) is * not a multiple of CBSIZE. */ if (cc > 0) break; } } /* adjust for data copied in but not written */ uio_setresid(uio, (uio_resid(uio) + cc)); (void) putc(0, &tp->t_canq); ttwakeup(tp); wakeup(TSA_PTS_READ(tp)); goto out; } while (uio_resid(uio) > 0 || cc > 0) { if (cc == 0) { cc = min(uio_resid(uio), BUFSIZ); cp = locbuf; error = uiomove((caddr_t)cp, cc, uio); if (error) goto out; /* check again for safety */ if ((tp->t_state & TS_ISOPEN) == 0) { /* adjust for data copied in but not written */ uio_setresid(uio, (uio_resid(uio) + cc)); error = EIO; goto out; } } while (cc > 0) { if ((tp->t_rawq.c_cc + tp->t_canq.c_cc) >= TTYHOG - 2 && (tp->t_canq.c_cc > 0 || !(tp->t_lflag&ICANON))) { wakeup(TSA_HUP_OR_INPUT(tp)); goto block; } (*linesw[tp->t_line].l_rint)(*cp++, tp); wcnt++; cc--; } cc = 0; } out: (void) thread_funnel_set(kernel_flock, funnel_state); return (error); block: /* * Come here to wait for slave to open, for space * in outq, or space in rawq, or an empty canq. */ if ((tp->t_state & TS_CONNECTED) == 0) { /* adjust for data copied in but not written */ uio_setresid(uio, (uio_resid(uio) + cc)); error = EIO; goto out; } if (flag & IO_NDELAY) { /* adjust for data copied in but not written */ uio_setresid(uio, (uio_resid(uio) + cc)); if (wcnt == 0) error = EWOULDBLOCK; goto out; } error = tsleep(TSA_PTC_WRITE(tp), TTOPRI | PCATCH, "ptcout", 0); if (error) { /* adjust for data copied in but not written */ uio_setresid(uio, (uio_resid(uio) + cc)); goto out; } goto again; } __private_extern__ int ptyioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct proc *p) { struct tty *tp = pt_tty[minor(dev)]; struct pt_ioctl *pti = &pt_ioctl[minor(dev)]; u_char *cc = tp->t_cc; int stop, error = 0; boolean_t funnel_state; funnel_state = thread_funnel_set(kernel_flock, TRUE); /* * IF CONTROLLER STTY THEN MUST FLUSH TO PREVENT A HANG. * ttywflush(tp) will hang if there are characters in the outq. */ if (cmd == TIOCEXT) { /* * When the EXTPROC bit is being toggled, we need * to send an TIOCPKT_IOCTL if the packet driver * is turned on. */ if (*(int *)data) { if (pti->pt_flags & PF_PKT) { pti->pt_send |= TIOCPKT_IOCTL; ptcwakeup(tp, FREAD); } tp->t_lflag |= EXTPROC; } else { if ((tp->t_lflag & EXTPROC) && (pti->pt_flags & PF_PKT)) { pti->pt_send |= TIOCPKT_IOCTL; ptcwakeup(tp, FREAD); } tp->t_lflag &= ~EXTPROC; } goto out; } else if (cdevsw[major(dev)].d_open == ptcopen) switch (cmd) { case TIOCGPGRP: /* * We aviod calling ttioctl on the controller since, * in that case, tp must be the controlling terminal. */ *(int *)data = tp->t_pgrp ? tp->t_pgrp->pg_id : 0; goto out; case TIOCPKT: if (*(int *)data) { if (pti->pt_flags & PF_UCNTL) { error = EINVAL; goto out; } pti->pt_flags |= PF_PKT; } else pti->pt_flags &= ~PF_PKT; goto out; case TIOCUCNTL: if (*(int *)data) { if (pti->pt_flags & PF_PKT) { error = EINVAL; goto out; } pti->pt_flags |= PF_UCNTL; } else pti->pt_flags &= ~PF_UCNTL; goto out; case TIOCREMOTE: if (*(int *)data) pti->pt_flags |= PF_REMOTE; else pti->pt_flags &= ~PF_REMOTE; ttyflush(tp, FREAD|FWRITE); goto out; #if COMPAT_43_TTY case TIOCSETP: case TIOCSETN: #endif case TIOCSETD: case TIOCSETA: case TIOCSETAW: case TIOCSETAF: ndflush(&tp->t_outq, tp->t_outq.c_cc); break; case TIOCSIG: if (*(unsigned int *)data >= NSIG || *(unsigned int *)data == 0) { error = EINVAL; goto out; } if ((tp->t_lflag&NOFLSH) == 0) ttyflush(tp, FREAD|FWRITE); tty_pgsignal(tp, *(unsigned int *)data, 1); if ((*(unsigned int *)data == SIGINFO) && ((tp->t_lflag&NOKERNINFO) == 0)) ttyinfo(tp); goto out; case TIOCPTYGRANT: /* grantpt(3) */ /* * Change the uid of the slave to that of the calling * thread, change the gid of the slave to GID_TTY, * change the mode to 0620 (rw--w----). */ { _devfs_setattr(pti->pt_devhandle, 0620, kauth_getuid(), GID_TTY); goto out; } case TIOCPTYGNAME: /* ptsname(3) */ /* * Report the name of the slave device in *data * (128 bytes max.). Use the same derivation method * used for calling devfs_make_node() to create it. */ snprintf(data, 128, "/dev/tty%c%x", START_CHAR + (minor(dev) / HEX_BASE), minor(dev) % HEX_BASE); error = 0; goto out; case TIOCPTYUNLK: /* unlockpt(3) */ /* * Unlock the slave device so that it can be opened. */ error = 0; goto out; } error = (*linesw[tp->t_line].l_ioctl)(tp, cmd, data, flag, p); if (error == ENOTTY) { error = ttioctl(tp, cmd, data, flag, p); if (error == ENOTTY) { if (pti->pt_flags & PF_UCNTL && (cmd & ~0xff) == UIOCCMD(0)) { /* Process the UIOCMD ioctl group */ if (cmd & 0xff) { pti->pt_ucntl = (u_char)cmd; ptcwakeup(tp, FREAD); } error = 0; goto out; } else if (cmd == TIOCSBRK || cmd == TIOCCBRK) { /* * POSIX conformance; rdar://3936338 * * Clear ENOTTY in the case of setting or * clearing a break failing because pty's * don't support break like real serial * ports. */ error = 0; goto out; } } } /* * If external processing and packet mode send ioctl packet. */ if ((tp->t_lflag&EXTPROC) && (pti->pt_flags & PF_PKT)) { switch(cmd) { case TIOCSETA: case TIOCSETAW: case TIOCSETAF: #if COMPAT_43_TTY case TIOCSETP: case TIOCSETN: #endif #if COMPAT_43_TTY || defined(COMPAT_SUNOS) case TIOCSETC: case TIOCSLTC: case TIOCLBIS: case TIOCLBIC: case TIOCLSET: #endif pti->pt_send |= TIOCPKT_IOCTL; ptcwakeup(tp, FREAD); default: break; } } stop = (tp->t_iflag & IXON) && CCEQ(cc[VSTOP], CTRL('s')) && CCEQ(cc[VSTART], CTRL('q')); if (pti->pt_flags & PF_NOSTOP) { if (stop) { pti->pt_send &= ~TIOCPKT_NOSTOP; pti->pt_send |= TIOCPKT_DOSTOP; pti->pt_flags &= ~PF_NOSTOP; ptcwakeup(tp, FREAD); } } else { if (!stop) { pti->pt_send &= ~TIOCPKT_DOSTOP; pti->pt_send |= TIOCPKT_NOSTOP; pti->pt_flags |= PF_NOSTOP; ptcwakeup(tp, FREAD); } } out: (void) thread_funnel_set(kernel_flock, funnel_state); return (error); }