/*
- * Copyright (c) 2000-2004 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 1997-2013 Apple Inc. All rights reserved.
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
*
*
* @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.
#include <sys/tty.h>
#include <sys/conf.h>
#include <sys/file_internal.h>
-#include <sys/uio.h>
+#include <sys/uio_internal.h>
#include <sys/kernel.h>
#include <sys/vnode.h>
#include <sys/user.h>
#include <sys/signalvar.h>
-#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 <security/mac_framework.h>
#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
#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 <miscfs/devfs/devfs.h>
#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<NPTY ; i++ ) {
- j = i / 32;
- k = i % 32;
- devfs_token_pts[i] =
- devfs_add_devswf(&pts_cdevsw,i,
- DV_CHR,0,0,0666,
- "tty%c%n",jnames[j],k);
- devfs_token_ptc[i] =
- devfs_add_devswf(&ptc_cdevsw,i,
- DV_CHR,0,0,0666,
- "pty%c%n",jnames[j],k);
- }
-#endif
- }
-}
-
-SYSINIT(ptcdev,SI_SUB_DRIVERS,SI_ORDER_MIDDLE+CDEV_MAJOR_C,ptc_drvinit,NULL)
-#endif /* !NeXT */
+#endif // DEVFS
projects / apple / xnu.git / blobdiff