X-Git-Url: https://git.saurik.com/apple/xnu.git/blobdiff_plain/8f6c56a50524aa785f7e596d52dddfb331e18961..3e170ce000f1506b7b5d2c5c7faec85ceabb573d:/bsd/kern/tty_pty.c diff --git a/bsd/kern/tty_pty.c b/bsd/kern/tty_pty.c index b7c6d5dc8..7c4f14e6a 100644 --- a/bsd/kern/tty_pty.c +++ b/bsd/kern/tty_pty.c @@ -1,5 +1,5 @@ /* - * Copyright (c) 2000-2004 Apple Computer, Inc. All rights reserved. + * Copyright (c) 1997-2013 Apple Inc. All rights reserved. * * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ * @@ -25,7 +25,6 @@ * * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ */ -/* Copyright (c) 1997 Apple Computer, Inc. All Rights Reserved */ /* * Copyright (c) 1982, 1986, 1989, 1993 * The Regents of the University of California. All rights reserved. @@ -75,62 +74,17 @@ #include #include #include -#include +#include #include #include #include #include -#ifndef NeXT - -#define FREE_BSDSTATIC static -#else -#define FREE_BSDSTATIC __private_extern__ -#define d_devtotty_t struct tty ** - -#ifdef d_stop_t -#undef d_stop_t +#if CONFIG_MACF +#include #endif -typedef void d_stop_t(struct tty *tp, int rw); - -#endif /* NeXT */ - -/* XXX function should be removed??? */ -int pty_init(int n_ptys); - -#ifdef notyet -static void ptyattach(int n); -#endif -static void ptsstart(struct tty *tp); -static void ptcwakeup(struct tty *tp, int flag); - -FREE_BSDSTATIC d_open_t ptsopen; -FREE_BSDSTATIC d_close_t ptsclose; -FREE_BSDSTATIC d_read_t ptsread; -FREE_BSDSTATIC d_write_t ptswrite; -FREE_BSDSTATIC d_ioctl_t ptyioctl; -FREE_BSDSTATIC d_stop_t ptsstop; -FREE_BSDSTATIC d_devtotty_t ptydevtotty; -FREE_BSDSTATIC d_open_t ptcopen; -FREE_BSDSTATIC d_close_t ptcclose; -FREE_BSDSTATIC d_read_t ptcread; -FREE_BSDSTATIC d_write_t ptcwrite; -FREE_BSDSTATIC d_select_t ptcselect; - -#ifndef NeXT -#define CDEV_MAJOR_S 5 -#define CDEV_MAJOR_C 6 -static struct cdevsw pts_cdevsw = - { ptsopen, ptsclose, ptsread, ptswrite, /*5*/ - ptyioctl, ptsstop, nullreset, ptydevtotty,/* ttyp */ - ttselect, nommap, NULL, "pts", NULL, -1 }; - -static struct cdevsw ptc_cdevsw = - { ptcopen, ptcclose, ptcread, ptcwrite, /*6*/ - ptyioctl, nullstop, nullreset, ptydevtotty,/* ptyp */ - ptcselect, nommap, NULL, "ptc", NULL, -1 }; -#endif /* !NeXT */ +#include "tty_dev.h" #if NPTY == 1 #undef NPTY @@ -138,916 +92,85 @@ static struct cdevsw ptc_cdevsw = #warning You have only one pty defined, redefining to 32. #endif -#ifndef NeXT -#ifdef DEVFS -#define MAXUNITS (8 * 32) -static void *devfs_token_pts[MAXUNITS]; -static void *devfs_token_ptc[MAXUNITS]; -static const char jnames[] = "pqrsPQRS"; -#if NPTY > MAXUNITS -#undef NPTY -#define NPTY MAXUNITS -#warning Can't have more than 256 pty's with DEVFS defined. -#endif /* NPTY > MAXUNITS */ -#endif /* DEVFS */ -#endif /* !NeXT */ - -#define BUFSIZ 100 /* Chunk size iomoved to/from user */ +#define PTY_MAJOR 5 +#define TTY_MAJOR 4 /* * pts == /dev/tty[pqrsPQRS][0123456789abcdefghijklmnopqrstuv] * ptc == /dev/pty[pqrsPQRS][0123456789abcdefghijklmnopqrstuv] */ -#ifndef NeXT -FREE_BSDSTATIC struct tty pt_tty[NPTY]; /* XXX */ -#else /* NeXT */ -/* NeXT All references to have been changed to indirections in the file */ -FREE_BSDSTATIC struct tty *pt_tty[NPTY] = { NULL }; -#endif /* ! NeXT */ - -static struct pt_ioctl { - int pt_flags; - struct selinfo pt_selr, pt_selw; - u_char pt_send; - u_char pt_ucntl; -} 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 */ - -#ifdef notyet -/* - * Establish n (or default if n is 1) ptys in the system. - * - * XXX cdevsw & pstat require the array `pty[]' to be an array - */ -FREEBSD_STATIC void -ptyattach(n) - int n; -{ - char *mem; - register u_long ntb; -#define DEFAULT_NPTY 32 +static struct ptmx_ioctl pt_ioctl[NPTY]; - /* maybe should allow 0 => none? */ - if (n <= 1) - n = DEFAULT_NPTY; - ntb = n * sizeof(struct tty); -#ifndef NeXT - mem = malloc(ntb + ALIGNBYTES + n * sizeof(struct pt_ioctl), - M_DEVBUF, M_WAITOK); -#else - MALLOC(mem, char *, ntb + ALIGNBYTES + n * sizeof(struct pt_ioctl), - M_DEVBUF, M_WAITOK); -#endif /* !NeXT */ - pt_tty = (struct tty *)mem; - mem = (char *)ALIGN(mem + ntb); - pt_ioctl = (struct pt_ioctl *)mem; - npty = n; -} -#endif +int pty_init(int n_ptys); #ifndef DEVFS int pty_init(__unused int n_ptys) { - return 0; + return 0; } -#else +#else // DEVFS #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; - (void)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 */ +static struct tty_dev_t _pty_driver; -/*ARGSUSED*/ -FREE_BSDSTATIC int -ptsopen(dev_t dev, int flag, __unused int devtype, __unused struct proc *p) +static struct ptmx_ioctl * +pty_get_ioctl(int minor, int open_flag) { - register struct tty *tp; - int error; - boolean_t funnel_state; - - funnel_state = thread_funnel_set(kernel_flock, TRUE); -#ifndef NeXT - tp = &pt_tty[minor(dev)]; -#else - /* - * 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)]) { - tp = pt_tty[minor(dev)] = ttymalloc(); - } else - tp = pt_tty[minor(dev)]; -#endif - 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; + if (minor >= NPTY) { + return NULL; } - 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); -} - -FREE_BSDSTATIC int -ptsclose(dev_t dev, int flag, __unused int mode, __unused proc_t p) -{ - register struct tty *tp; - int err; - boolean_t funnel_state; - - funnel_state = thread_funnel_set(kernel_flock, TRUE); - - tp = pt_tty[minor(dev)]; - err = (*linesw[tp->t_line].l_close)(tp, flag); - ptsstop(tp, FREAD|FWRITE); - (void) ttyclose(tp); - - (void) thread_funnel_set(kernel_flock, funnel_state); - return (err); -} - -FREE_BSDSTATIC int -ptsread(dev, uio, flag) - dev_t dev; - struct uio *uio; - int flag; -{ -#ifndef NeXT - struct proc *p = curproc; -#else - struct proc *p = current_proc(); -#endif /* NeXT */ - register struct tty *tp = pt_tty[minor(dev)]; - register struct pt_ioctl *pti = &pt_ioctl[minor(dev)]; - int error = 0; - struct uthread *ut; - boolean_t funnel_state; - - 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_pgrp->pg_jobc == 0 || - p->p_flag & P_PPWAIT) { - error = EIO; - goto out; - } - pgsignal(p->p_pgrp, SIGTTIN, 1); - 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; + struct ptmx_ioctl *pti = &pt_ioctl[minor]; + if (open_flag & (PF_OPEN_M|PF_OPEN_S)) { + if (!pti->pt_tty) { + pti->pt_tty = ttymalloc(); } - 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, buf, cc); - error = uiomove(buf, cc, uio); - if (error) - break; + if (!pti->pt_tty) { + return NULL; } - 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. - */ -FREE_BSDSTATIC int -ptswrite(dev, uio, flag) - dev_t dev; - struct uio *uio; - int flag; -{ - register 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(tp) - struct tty *tp; -{ - register 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; + return pti; } -static void -ptcwakeup(tp, flag) - struct tty *tp; - int flag; +static int +pty_get_name(int minor, char *buffer, size_t size) { - 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); -} - -FREE_BSDSTATIC int -ptcopen(dev_t dev, __unused int flag, __unused int devtype, __unused proc_t p) -{ - register 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 (tp->t_oproc) { - error = EIO; - 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); + return snprintf(buffer, size, "/dev/tty%c%x", + START_CHAR + (minor / HEX_BASE), + minor % HEX_BASE); } -FREE_BSDSTATIC int -ptcclose(dev_t dev, __unused int flags, __unused int fmt, __unused proc_t p) +int +pty_init(int n_ptys) { - register 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); + int i; + int j; + + n_ptys = min(n_ptys, NPTY); /* clamp to avoid pt_ioctl overflow */ + + /* 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(TTY_MAJOR, m), + DEVFS_CHAR, UID_ROOT, GID_WHEEL, 0666, + "tty%c%x", j + START_CHAR, i); + (void)devfs_make_node(makedev(PTY_MAJOR, m), + DEVFS_CHAR, UID_ROOT, GID_WHEEL, 0666, + "pty%c%x", j + START_CHAR, i); + } + } +done: + _pty_driver.master = PTY_MAJOR; + _pty_driver.slave = TTY_MAJOR; + _pty_driver.open_reset = 1; + _pty_driver.open = &pty_get_ioctl; + _pty_driver.name = &pty_get_name; + tty_dev_register(&_pty_driver); return (0); } - -FREE_BSDSTATIC int -ptcread(dev, uio, flag) - dev_t dev; - struct uio *uio; - int flag; -{ - register 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, 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); -} - -FREE_BSDSTATIC void -ptsstop(tp, flush) - register 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); -} - -FREE_BSDSTATIC int -ptcselect(dev, rw, wql, p) - dev_t dev; - int rw; - void * wql; - struct proc *p; -{ - register 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_iflag&ICANON)) { - retval = 1; - goto out; - } - } - } - selrecord(p, &pti->pt_selw, wql); - break; - - } -out: - (void) thread_funnel_set(kernel_flock, funnel_state); - return (retval); -} - -FREE_BSDSTATIC int -ptcwrite(dev, uio, flag) - dev_t dev; - register struct uio *uio; - int flag; -{ - register struct tty *tp = pt_tty[minor(dev)]; - register u_char *cp = NULL; - register 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((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_iflag&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; -} - -#ifndef NeXT -/* XXX we eventually want to go to this model, - * but premier can't change the cdevsw */ -static struct tty * -ptydevtotty(dev) - dev_t dev; -{ - if (minor(dev) >= npty) - return (NULL); - - return &pt_tty[minor(dev)]; -} -#endif /* !NeXT */ - -/*ARGSUSED*/ -FREE_BSDSTATIC int -#ifndef NeXT -ptyioctl(dev, cmd, data, flag) - dev_t dev; - int cmd; - caddr_t data; - int flag; -#else -ptyioctl(dev, cmd, data, flag, p) - dev_t dev; - u_long cmd; - caddr_t data; - int flag; - struct proc *p; -#endif -{ - register struct tty *tp = pt_tty[minor(dev)]; - register struct pt_ioctl *pti = &pt_ioctl[minor(dev)]; - register 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 -#ifndef NeXT - if (cdevsw[major(dev)]->d_open == ptcopen) -#else - if (cdevsw[major(dev)].d_open == ptcopen) -#endif - 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); - pgsignal(tp->t_pgrp, *(unsigned int *)data, 1); - if ((*(unsigned int *)data == SIGINFO) && - ((tp->t_lflag&NOKERNINFO) == 0)) - ttyinfo(tp); - 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 - && 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; - } - } - - /* - * 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); -} - -#ifndef NeXT -static ptc_devsw_installed = 0; - -static void -ptc_drvinit(void *unused) -{ -#ifdef DEVFS - int i,j,k; -#endif - dev_t dev; - - if( ! ptc_devsw_installed ) { - dev = makedev(CDEV_MAJOR_S, 0); - cdevsw_add(&dev, &pts_cdevsw, NULL); - dev = makedev(CDEV_MAJOR_C, 0); - cdevsw_add(&dev, &ptc_cdevsw, NULL); - ptc_devsw_installed = 1; -#ifdef DEVFS - for ( i = 0 ; i