sys/kern/tty_snoop.c is now sys/dev/snp/snp.c.

Repo-copy by:	jdp

3 files changed, 3 insertions, 613 deletions

diff --git a/sys/conf/files b/sys/conf/files
index 82ff30a..d596ca5 100644
--- a/sys/conf/files
+++ b/sys/conf/files
@@ -476,6 +476,7 @@ dev/sn/if_sn.c		optional sn
 dev/sn/if_sn_isa.c	optional sn isa
 dev/sn/if_sn_pccard.c	optional sn card
 dev/sn/if_sn_pccard.c	optional sn pccard
+dev/snp/snp.c		optional snp
 dev/sound/isa/ad1816.c	optional pcm isa
 dev/sound/isa/emu8000.c	optional midi isa
 dev/sound/isa/es1888.c	optional pcm isa
@@ -825,7 +826,6 @@ kern/tty_compat.c	standard
 kern/tty_conf.c		standard
 kern/tty_cons.c		standard
 kern/tty_pty.c		optional pty
-kern/tty_snoop.c	optional snp
 kern/tty_subr.c		standard
 kern/tty_tty.c		standard
 kern/uipc_accf.c	optional inet
diff --git a/sys/kern/tty_snoop.c b/sys/kern/tty_snoop.c
deleted file mode 100644
index d0563c8..0000000
--- a/sys/kern/tty_snoop.c
+++ /dev/null
@@ -1,610 +0,0 @@
-/*
- * Copyright (c) 1995 Ugen J.S.Antsilevich
- *
- * Redistribution and use in source forms, with and without modification,
- * are permitted provided that this entire comment appears intact.
- *
- * Redistribution in binary form may occur without any restrictions.
- * Obviously, it would be nice if you gave credit where credit is due
- * but requiring it would be too onerous.
- *
- * This software is provided ``AS IS'' without any warranties of any kind.
- *
- * Snoop stuff.
- *
- * $FreeBSD$
- */
-
-#include <sys/param.h>
-#include <sys/systm.h>
-#include <sys/filio.h>
-#include <sys/malloc.h>
-#include <sys/tty.h>
-#include <sys/conf.h>
-#include <sys/poll.h>
-#include <sys/kernel.h>
-#include <sys/queue.h>
-#include <sys/snoop.h>
-#include <sys/vnode.h>
-
-static	l_close_t	snplclose;
-static	l_write_t	snplwrite;
-static	d_open_t	snpopen;
-static	d_close_t	snpclose;
-static	d_read_t	snpread;
-static	d_write_t	snpwrite;
-static	d_ioctl_t	snpioctl;
-static	d_poll_t	snppoll;
-
-#define CDEV_MAJOR 53
-static struct cdevsw snp_cdevsw = {
-	/* open */	snpopen,
-	/* close */	snpclose,
-	/* read */	snpread,
-	/* write */	snpwrite,
-	/* ioctl */	snpioctl,
-	/* poll */	snppoll,
-	/* mmap */	nommap,
-	/* strategy */	nostrategy,
-	/* name */	"snp",
-	/* maj */	CDEV_MAJOR,
-	/* dump */	nodump,
-	/* psize */	nopsize,
-	/* flags */	0,
-};
-
-static struct linesw snpdisc = {
-	ttyopen,	snplclose,	ttread,		snplwrite,
-	l_nullioctl,	ttyinput,	ttstart,	ttymodem
-};
-
-static MALLOC_DEFINE(M_SNP, "snp", "Snoop device data");
-/*
- * The number of the "snoop" line discipline.  This gets determined at
- * module load time.
- */
-static int snooplinedisc;
-
-
-static LIST_HEAD(, snoop) snp_sclist = LIST_HEAD_INITIALIZER(&snp_sclist);
-
-static struct tty	*snpdevtotty __P((dev_t dev));
-static void		snp_clone __P((void *arg, char *name,
-			    int namelen, dev_t *dev));
-static int		snp_detach __P((struct snoop *snp));
-static int		snp_down __P((struct snoop *snp));
-static int		snp_in __P((struct snoop *snp, char *buf, int n));
-static int		snp_modevent __P((module_t mod, int what, void *arg));
-
-static int
-snplclose(tp, flag)
-	struct tty *tp;
-	int flag;
-{
-	struct snoop *snp;
-	int error;
-
-	snp = tp->t_sc;
-	error = snp_down(snp);
-	if (error != 0)
-		return (error);
-	error = ttylclose(tp, flag);
-	return (error);
-}
-
-static int
-snplwrite(tp, uio, flag)
-	struct tty *tp;
-	struct uio *uio;
-	int flag;
-{
-	struct iovec iov;
-	struct uio uio2;
-	struct snoop *snp;
-	int error, ilen;
-	char ibuf[512];
-
-	snp = tp->t_sc;
-	while (uio->uio_resid > 0) {
-		ilen = imin(sizeof(ibuf), uio->uio_resid);
-		error = uiomove(ibuf, ilen, uio);
-		if (error != 0)
-			return (error);
-		snp_in(snp, ibuf, ilen);
-		/* Hackish, but probably the least of all evils. */
-		iov.iov_base = ibuf;
-		iov.iov_len = ilen;
-		uio2.uio_iov = &iov;
-		uio2.uio_iovcnt = 1;
-		uio2.uio_offset = 0;
-		uio2.uio_resid = ilen;
-		uio2.uio_segflg = UIO_SYSSPACE;
-		uio2.uio_rw = UIO_WRITE;
-		uio2.uio_procp = uio->uio_procp;
-		error = ttwrite(tp, &uio2, flag);
-		if (error != 0)
-			return (error);
-	}
-	return (0);
-}
-
-static struct tty *
-snpdevtotty(dev)
-	dev_t dev;
-{
-	struct cdevsw *cdp;
-
-	cdp = devsw(dev);
-	if (cdp == NULL || (cdp->d_flags & D_TTY) == 0)
-		return (NULL);
-	return (dev->si_tty);
-}
-
-#define SNP_INPUT_BUF	5	/* This is even too much, the maximal
-				 * interactive mode write is 3 bytes
-				 * length for function keys...
-				 */
-
-static int
-snpwrite(dev, uio, flag)
-	dev_t dev;
-	struct uio *uio;
-	int flag;
-{
-	struct snoop *snp;
-	struct tty *tp;
-	int error, i, len;
-	char c[SNP_INPUT_BUF];
-
-	snp = dev->si_drv1;
-	tp = snp->snp_tty;
-	if (tp == NULL)
-		return (EIO);
-	if ((tp->t_sc == snp) && (tp->t_state & TS_SNOOP) &&
-	    tp->t_line == snooplinedisc)
-		goto tty_input;
-
-	printf("Snoop: attempt to write to bad tty.\n");
-	return (EIO);
-
-tty_input:
-	if (!(tp->t_state & TS_ISOPEN))
-		return (EIO);
-
-	while (uio->uio_resid > 0) {
-		len = imin(uio->uio_resid, SNP_INPUT_BUF);
-		if ((error = uiomove(c, len, uio)) != 0)
-			return (error);
-		for (i=0; i < len; i++) {
-			if (ttyinput(c[i], tp))
-				return (EIO);
-		}
-	}
-	return (0);
-}
-
-
-static int
-snpread(dev, uio, flag)
-	dev_t dev;
-	struct uio *uio;
-	int flag;
-{
-	struct snoop *snp;
-	int error, len, n, nblen, s;
-	caddr_t from;
-	char *nbuf;
-
-	snp = dev->si_drv1;
-	KASSERT(snp->snp_len + snp->snp_base <= snp->snp_blen,
-	    ("snoop buffer error"));
-
-	if (snp->snp_tty == NULL)
-		return (EIO);
-
-	snp->snp_flags &= ~SNOOP_RWAIT;
-
-	do {
-		if (snp->snp_len == 0) {
-			if (flag & IO_NDELAY)
-				return (EWOULDBLOCK);
-			snp->snp_flags |= SNOOP_RWAIT;
-			tsleep((caddr_t)snp, (PZERO + 1) | PCATCH, "snprd", 0);
-		}
-	} while (snp->snp_len == 0);
-
-	n = snp->snp_len;
-
-	error = 0;
-	while (snp->snp_len > 0 && uio->uio_resid > 0 && error == 0) {
-		len = min((unsigned)uio->uio_resid, snp->snp_len);
-		from = (caddr_t)(snp->snp_buf + snp->snp_base);
-		if (len == 0)
-			break;
-
-		error = uiomove(from, len, uio);
-		snp->snp_base += len;
-		snp->snp_len -= len;
-	}
-	if ((snp->snp_flags & SNOOP_OFLOW) && (n < snp->snp_len)) {
-		snp->snp_flags &= ~SNOOP_OFLOW;
-	}
-	s = spltty();
-	nblen = snp->snp_blen;
-	if (((nblen / 2) >= SNOOP_MINLEN) && (nblen / 2) >= snp->snp_len) {
-		while (nblen / 2 >= snp->snp_len && nblen / 2 >= SNOOP_MINLEN)
-			nblen = nblen / 2;
-		if ((nbuf = malloc(nblen, M_SNP, M_NOWAIT)) != NULL) {
-			bcopy(snp->snp_buf + snp->snp_base, nbuf, snp->snp_len);
-			free(snp->snp_buf, M_SNP);
-			snp->snp_buf = nbuf;
-			snp->snp_blen = nblen;
-			snp->snp_base = 0;
-		}
-	}
-	splx(s);
-
-	return (error);
-}
-
-static int
-snp_in(snp, buf, n)
-	struct snoop *snp;
-	char *buf;
-	int n;
-{
-	int s_free, s_tail;
-	int s, len, nblen;
-	caddr_t from, to;
-	char *nbuf;
-
-	KASSERT(n >= 0, ("negative snoop char count"));
-
-	if (n == 0)
-		return (0);
-
-	if (snp->snp_flags & SNOOP_DOWN) {
-		printf("Snoop: more data to down interface.\n");
-		return (0);
-	}
-
-	if (snp->snp_flags & SNOOP_OFLOW) {
-		printf("Snoop: buffer overflow.\n");
-		/*
-		 * On overflow we just repeat the standart close
-		 * procedure...yes , this is waste of space but.. Then next
-		 * read from device will fail if one would recall he is
-		 * snooping and retry...
-		 */
-
-		return (snp_down(snp));
-	}
-	s_tail = snp->snp_blen - (snp->snp_len + snp->snp_base);
-	s_free = snp->snp_blen - snp->snp_len;
-
-
-	if (n > s_free) {
-		s = spltty();
-		nblen = snp->snp_blen;
-		while ((n > s_free) && ((nblen * 2) <= SNOOP_MAXLEN)) {
-			nblen = snp->snp_blen * 2;
-			s_free = nblen - (snp->snp_len + snp->snp_base);
-		}
-		if ((n <= s_free) && (nbuf = malloc(nblen, M_SNP, M_NOWAIT))) {
-			bcopy(snp->snp_buf + snp->snp_base, nbuf, snp->snp_len);
-			free(snp->snp_buf, M_SNP);
-			snp->snp_buf = nbuf;
-			snp->snp_blen = nblen;
-			snp->snp_base = 0;
-		} else {
-			snp->snp_flags |= SNOOP_OFLOW;
-			if (snp->snp_flags & SNOOP_RWAIT) {
-				snp->snp_flags &= ~SNOOP_RWAIT;
-				wakeup((caddr_t)snp);
-			}
-			splx(s);
-			return (0);
-		}
-		splx(s);
-	}
-	if (n > s_tail) {
-		from = (caddr_t)(snp->snp_buf + snp->snp_base);
-		to = (caddr_t)(snp->snp_buf);
-		len = snp->snp_len;
-		bcopy(from, to, len);
-		snp->snp_base = 0;
-	}
-	to = (caddr_t)(snp->snp_buf + snp->snp_base + snp->snp_len);
-	bcopy(buf, to, n);
-	snp->snp_len += n;
-
-	if (snp->snp_flags & SNOOP_RWAIT) {
-		snp->snp_flags &= ~SNOOP_RWAIT;
-		wakeup((caddr_t)snp);
-	}
-	selwakeup(&snp->snp_sel);
-	snp->snp_sel.si_pid = 0;
-
-	return (n);
-}
-
-static int
-snpopen(dev, flag, mode, p)
-	dev_t dev;
-	int flag, mode;
-	struct proc *p;
-{
-	struct snoop *snp;
-	int error;
-
-	if ((error = suser(p)) != 0)
-		return (error);
-
-	if (dev->si_drv1 == NULL) {
-		if (!(dev->si_flags & SI_NAMED))
-			make_dev(&snp_cdevsw, minor(dev), UID_ROOT, GID_WHEEL,
-			    0600, "snp%d", dev2unit(dev));
-		dev->si_drv1 = snp = malloc(sizeof(*snp), M_SNP,
-		    M_WAITOK | M_ZERO);
-	} else
-		return (EBUSY);
-
-	/*
-	 * We intentionally do not OR flags with SNOOP_OPEN, but set them so
-	 * all previous settings (especially SNOOP_OFLOW) will be cleared.
-	 */
-	snp->snp_flags = SNOOP_OPEN;
-
-	snp->snp_buf = malloc(SNOOP_MINLEN, M_SNP, M_WAITOK);
-	snp->snp_blen = SNOOP_MINLEN;
-	snp->snp_base = 0;
-	snp->snp_len = 0;
-
-	/*
-	 * snp_tty == NULL  is for inactive snoop devices.
-	 */
-	snp->snp_tty = NULL;
-	snp->snp_target = NODEV;
-
-	LIST_INSERT_HEAD(&snp_sclist, snp, snp_list);
-	return (0);
-}
-
-
-static int
-snp_detach(snp)
-	struct snoop *snp;
-{
-	struct tty *tp;
-
-	snp->snp_base = 0;
-	snp->snp_len = 0;
-
-	/*
-	 * If line disc. changed we do not touch this pointer, SLIP/PPP will
-	 * change it anyway.
-	 */
-	tp = snp->snp_tty;
-	if (tp == NULL)
-		goto detach_notty;
-
-	if (tp && (tp->t_sc == snp) && (tp->t_state & TS_SNOOP) &&
-	    tp->t_line == snooplinedisc) {
-		tp->t_sc = NULL;
-		tp->t_state &= ~TS_SNOOP;
-		tp->t_line = snp->snp_olddisc;
-	} else
-		printf("Snoop: bad attached tty data.\n");
-
-	snp->snp_tty = NULL;
-	snp->snp_target = NODEV;
-
-detach_notty:
-	selwakeup(&snp->snp_sel);
-	snp->snp_sel.si_pid = 0;
-	if ((snp->snp_flags & SNOOP_OPEN) == 0) 
-		free(snp, M_SNP);
-
-	return (0);
-}
-
-static int
-snpclose(dev, flags, fmt, p)
-	dev_t dev;
-	int flags;
-	int fmt;
-	struct proc *p;
-{
-	struct snoop *snp;
-
-	snp = dev->si_drv1;
-	snp->snp_blen = 0;
-	LIST_REMOVE(snp, snp_list);
-	free(snp->snp_buf, M_SNP);
-	snp->snp_flags &= ~SNOOP_OPEN;
-	dev->si_drv1 = NULL;
-	destroy_dev(dev);
-
-	return (snp_detach(snp));
-}
-
-static int
-snp_down(snp)
-	struct snoop *snp;
-{
-
-	if (snp->snp_blen != SNOOP_MINLEN) {
-		free(snp->snp_buf, M_SNP);
-		snp->snp_buf = malloc(SNOOP_MINLEN, M_SNP, M_WAITOK);
-		snp->snp_blen = SNOOP_MINLEN;
-	}
-	snp->snp_flags |= SNOOP_DOWN;
-
-	return (snp_detach(snp));
-}
-
-static int
-snpioctl(dev, cmd, data, flags, p)
-	dev_t dev;
-	u_long cmd;
-	caddr_t data;
-	int flags;
-	struct proc *p;
-{
-	struct snoop *snp;
-	struct tty *tp, *tpo;
-	dev_t tdev;
-	int s;
-
-	snp = dev->si_drv1;
-	switch (cmd) {
-	case SNPSTTY:
-		tdev = udev2dev(*((udev_t *)data), 0);
-		if (tdev == NODEV)
-			return (snp_down(snp));
-
-		tp = snpdevtotty(tdev);
-		if (!tp)
-			return (EINVAL);
-
-		s = spltty();
-
-		if (snp->snp_target == NODEV) {
-			tpo = snp->snp_tty;
-			if (tpo)
-				tpo->t_state &= ~TS_SNOOP;
-		}
-
-		tp->t_sc = (caddr_t)snp;
-		tp->t_state |= TS_SNOOP;
-		snp->snp_olddisc = tp->t_line;
-		tp->t_line = snooplinedisc;
-		snp->snp_tty = tp;
-		snp->snp_target = tdev;
-
-		/*
-		 * Clean overflow and down flags -
-		 * we'll have a chance to get them in the future :)))
-		 */
-		snp->snp_flags &= ~SNOOP_OFLOW;
-		snp->snp_flags &= ~SNOOP_DOWN;
-		splx(s);
-		break;
-
-	case SNPGTTY:
-		/*
-		 * We keep snp_target field specially to make
-		 * SNPGTTY happy, else we can't know what is device
-		 * major/minor for tty.
-		 */
-		*((dev_t *)data) = snp->snp_target;
-		break;
-
-	case FIONBIO:
-		break;
-
-	case FIOASYNC:
-		if (*(int *)data)
-			snp->snp_flags |= SNOOP_ASYNC;
-		else
-			snp->snp_flags &= ~SNOOP_ASYNC;
-		break;
-
-	case FIONREAD:
-		s = spltty();
-		if (snp->snp_tty != NULL)
-			*(int *)data = snp->snp_len;
-		else
-			if (snp->snp_flags & SNOOP_DOWN) {
-				if (snp->snp_flags & SNOOP_OFLOW)
-					*(int *)data = SNP_OFLOW;
-				else
-					*(int *)data = SNP_TTYCLOSE;
-			} else {
-				*(int *)data = SNP_DETACH;
-			}
-		splx(s);
-		break;
-
-	default:
-		return (ENOTTY);
-	}
-	return (0);
-}
-
-static int
-snppoll(dev, events, p)
-	dev_t dev;
-	int events;
-	struct proc *p;
-{
-	struct snoop *snp;
-	int revents;
-
-	snp = dev->si_drv1;
-	revents = 0;
-	/*
-	 * If snoop is down, we don't want to poll() forever so we return 1.
-	 * Caller should see if we down via FIONREAD ioctl().  The last should
-	 * return -1 to indicate down state.
-	 */
-	if (events & (POLLIN | POLLRDNORM)) {
-		if (snp->snp_flags & SNOOP_DOWN || snp->snp_len > 0)
-			revents |= events & (POLLIN | POLLRDNORM);
-		else
-			selrecord(p, &snp->snp_sel);
-	}
-	return (revents);
-}
-
-static void
-snp_clone(arg, name, namelen, dev)
-	void *arg;
-	char *name;
-	int namelen;
-	dev_t *dev;
-{
-	int u;
-
-	if (*dev != NODEV)
-		return;
-	if (dev_stdclone(name, NULL, "snp", &u) != 1)
-		return;
-	*dev = make_dev(&snp_cdevsw, unit2minor(u), UID_ROOT, GID_WHEEL, 0600,
-	    "snp%d", u);
-}
-
-static int
-snp_modevent(mod, type, data)
-	module_t mod;
-	int type;
-	void *data;
-{
-	static eventhandler_tag eh_tag;
-
-	switch (type) {
-	case MOD_LOAD:
-		/* XXX error checking. */
-		eh_tag = EVENTHANDLER_REGISTER(dev_clone, snp_clone, 0, 1000);
-		snooplinedisc = ldisc_register(LDISC_LOAD, &snpdisc);
-		cdevsw_add(&snp_cdevsw);
-		break;
-	case MOD_UNLOAD:
-		if (!LIST_EMPTY(&snp_sclist))
-			return (EBUSY);
-		EVENTHANDLER_DEREGISTER(dev_clone, eh_tag);
-		ldisc_deregister(snooplinedisc);
-		cdevsw_remove(&snp_cdevsw);
-		break;
-	default:
-		break;
-	}
-	return (0);
-}
-
-static moduledata_t snp_mod = {
-        "snp",
-        snp_modevent,
-        NULL
-};
-DECLARE_MODULE(snp, snp_mod, SI_SUB_DRIVERS, SI_ORDER_MIDDLE + CDEV_MAJOR);
diff --git a/sys/modules/snp/Makefile b/sys/modules/snp/Makefile
index 23a7581..6a450b2 100644
--- a/sys/modules/snp/Makefile
+++ b/sys/modules/snp/Makefile
@@ -1,9 +1,9 @@
 # $FreeBSD$
 
-.PATH: ${.CURDIR}/../../kern
+.PATH: ${.CURDIR}/../../dev/snp
 
 KMOD=	snp
-SRCS=	tty_snoop.c vnode_if.h
+SRCS=	snp.c vnode_if.h
 NOMAN=
 
 .include <bsd.kmod.mk>