Remove if_ppp(4) and if_sl(4).

Not only did these two drivers depend on IFF_NEEDSGIANT, they were
broken 7 months ago during the MPSAFE TTY import. if_ppp(4) has been
replaced by ppp(8). There is no replacement for if_sl(4).

If we see regressions in for example the ports tree, we should just use
__FreeBSD_version 800045 to check whether if_ppp(4) and if_sl(4) are
present. Version 800045 is used to denote the import of MPSAFE TTY.

Discussed with: rwatson, but also rwatson's IFF_NEEDSGIANT emails on the
                lists.

4 files changed, 0 insertions, 916 deletions

diff --git a/usr.sbin/sliplogin/Makefile b/usr.sbin/sliplogin/Makefile
deleted file mode 100644
index 0236f1e..0000000
--- a/usr.sbin/sliplogin/Makefile
+++ /dev/null
@@ -1,11 +0,0 @@
-#	@(#)Makefile	8.1 (Berkeley) 7/19/93
-# $FreeBSD$
-
-PROG=	sliplogin
-MAN=	sliplogin.8
-BINOWN=	root
-BINGRP=	network
-BINMODE=4550
-PRECIOUSPROG=
-
-.include <bsd.prog.mk>
diff --git a/usr.sbin/sliplogin/pathnames.h b/usr.sbin/sliplogin/pathnames.h
deleted file mode 100644
index e318f92..0000000
--- a/usr.sbin/sliplogin/pathnames.h
+++ /dev/null
@@ -1,44 +0,0 @@
-/*-
- * Copyright (c) 1990, 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.
- * 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.
- *
- *	From: @(#)pathnames.h	8.1 (Berkeley) 6/6/93
- *	$FreeBSD$
- */
-
-#ifndef COMPAT
-#include <paths.h>
-#else
-#define	_PATH_DEVNULL	"/dev/null"
-#endif
-
-#define	_PATH_ACCESS	"/etc/sliphome/slip.hosts"
-#define _PATH_SLPARMS   "/etc/sliphome/slip.slparms"
-#define	_PATH_SLIP_LOGIN	"/etc/sliphome/slip.login"
-#define	_PATH_SLIP_LOGOUT	"/etc/sliphome/slip.logout"
-#define	_PATH_DEBUG	"/tmp/sliplogin.XXXXXX"
-
diff --git a/usr.sbin/sliplogin/sliplogin.8 b/usr.sbin/sliplogin/sliplogin.8
deleted file mode 100644
index 1f6960b..0000000
--- a/usr.sbin/sliplogin/sliplogin.8
+++ /dev/null
@@ -1,317 +0,0 @@
-.\" Copyright (c) 1990, 1991, 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.
-.\" 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.
-.\"
-.\"     @(#)sliplogin.8	8.2 (Berkeley) 1/5/94
-.\" $FreeBSD$
-.\"
-.Dd January 5, 1994
-.Dt SLIPLOGIN 8
-.Os
-.Sh NAME
-.Nm sliplogin
-.Nd attach a serial line network interface
-.Sh SYNOPSIS
-.Nm
-.Op Ar loginname Op Ar device
-.Sh DESCRIPTION
-The
-.Nm
-utility is used to turn the terminal line on standard input (or
-.Ar device )
-into a Serial Line IP
-.Pq Tn SLIP
-link to a remote host.
-To do this, the program
-searches the file
-.Pa /etc/sliphome/slip.hosts
-for an entry matching
-.Ar loginname
-(which defaults to the current login name if omitted).
-If a matching entry is found, the line is configured appropriately
-for slip (8-bit transparent i/o) and converted to
-.Tn SLIP
-line discipline using the optional line discipline parameters.
-.Pp
-The optional line discipline parameters consist of one or more of
-the following;
-.Sq normal ,
-.Sq compress ,
-.Sq noicmp ,
-or
-.Sq autocomp
-which correspond respectively to
-.Sq use normal line discipline
-(no header compression),
-.Sq enable VJ header compression ,
-.Sq throw away ICMP packets ,
-and
-.Sq auto enable VJ header compression
-(only if the remote end of the link also supports it).
-.Pp
-Then a shell script is invoked to initialize the slip
-interface with the appropriate local and remote
-.Tn IP
-address,
-netmask, etc.
-.Pp
-The usual initialization script is
-.Pa /etc/sliphome/slip.login
-but, if particular hosts need special initialization, the file
-.Pa /etc/sliphome/slip.login. Ns Ar loginname
-will be executed instead if it exists.
-The script is invoked with the parameters
-.Bl -tag -width slipunit
-.It Em slipunit
-The unit number of the slip interface assigned to this line.
-E.g.,
-.Sy 0
-for
-.Sy sl0 .
-.It Em speed
-The speed of the line.
-.It Em args
-The arguments from the
-.Pa /etc/sliphome/slip.hosts
-entry, in order starting with
-.Ar loginname .
-.El
-.Pp
-Only the super-user may attach a network interface.
-The interface is
-automatically detached when the other end hangs up or the
-.Nm
-process dies.
-If the kernel slip
-module has been configured for it, all routes through that interface will
-also disappear at the same time.
-If there is other processing a site
-would like done on hangup, the file
-.Pa /etc/sliphome/slip.logout
-or
-.Pa /etc/sliphome/slip.logout. Ns Ar loginname
-is executed if it exists.
-It is given the same arguments as the login script.
-.Ss Format of /etc/sliphome/slip.hosts
-Comments (lines starting with a `#') and blank lines (or started
-with space) are ignored.
-Other lines must start with a
-.Ar loginname
-but the remaining arguments can be whatever is appropriate for the
-.Pa slip.login
-file that will be executed for that name.
-Arguments are separated by white space and follow normal
-.Xr sh 1
-quoting conventions (however,
-.Ar loginname
-cannot be quoted).
-Usually, lines have the form
-.Bd -literal -offset indent
-loginname local-address remote-address netmask opt-args
-.Ed
-.Pp
-where
-.Em local-address
-and
-.Em remote-address
-are the IP host names or addresses of the local and remote ends of the
-slip line and
-.Em netmask
-is the appropriate IP netmask.
-These arguments are passed
-directly to
-.Xr ifconfig 8 .
-.Em Opt-args
-are optional arguments used to configure the line.
-.Sh FreeBSD Additions
-An additional SLIP configuration file (if present) is
-.Pa /etc/sliphome/slip.slparms .
-If particular hosts need different configurations, the file
-.Pa /etc/sliphome/slip.slparms. Ns Ar loginname
-will be parsed instead if it exists.
-.Ss Format of /etc/sliphome/slip.slparms*
-Comments (lines starting with a `#') and blank lines (or started with
-space) are ignored.
-This file contains from one to three numeric parameters separated with spaces,
-in order:
-.Ar keepalive ,
-.Ar outfill
-and
-.Ar slunit .
-.Bl -tag -width keepalive
-.It Ar keepalive
-Set SLIP "keep alive" timeout in seconds.
-If FRAME_END is not received in
-this amount of time,
-.Nm
-closes the line and exits.
-The default value is no timeout (zero).
-.It Ar outfill
-Set SLIP "out fill" timeout in seconds.
-It forces at least one FRAME_END
-to be sent during this time period, which is necessary for the "keep alive"
-timeout on the remote side.
-The default value is no timeout (zero).
-.It Ar slunit
-Set the SLIP unit number directly.
-Use with caution, because no check is made
-for two interfaces with same number.
-By default sliplogin dynamically assigns the unit number.
-.El
-.Pp
-If latter two parameters are omitted, they will not affect the
-corresponding SLIP configuration.
-If any of first two parameters is equal to zero, it will not affect
-the corresponding SLIP configuration.
-.Sh FILES
-.Bl -tag -width indent
-.It Pa /etc/sliphome/slip.hosts
-list of host login names and parameters.
-.It Pa /etc/sliphome/slip.login
-script executed when a connection is made.
-.It Pa /etc/sliphome/slip.login. Ns Ar loginname
-script executed when a connection is made by
-.Ar loginname .
-.It Pa /etc/sliphome/slip.logout
-script executed when a connection is lost.
-.It Pa /etc/sliphome/slip.logout. Ns Ar loginname
-script executed when a connection is lost by
-.Ar loginname .
-.It Pa /etc/sliphome/slip.slparms
-extra parameters file.
-.It Pa /etc/sliphome/slip.slparms. Ns Ar loginname
-extra parameters file for
-.Ar loginname .
-.It Pa /var/run/ Ns Ar ttyXn Ns Pa .if
-contains the name of the network interface used by the sliplogin process on
-.Ar ttyXn .
-.It Pa /var/run/ Ns Ar slX Ns Pa .pid
-contains the PID of the sliplogin process which is using interface
-.Ar slX .
-.El
-.Sh EXAMPLES
-The normal use of
-.Nm
-is to create a
-.Pa /etc/passwd
-entry for each legal, remote slip site with
-.Nm
-as the shell for that entry.
-E.g.,
-.Bd -literal
-Sfoo:ikhuy6:2010:1:slip line to foo:/tmp:/usr/sbin/sliplogin
-.Ed
-.Pp
-(Our convention is to name the account used by remote host
-.Ar hostname
-as
-.Em Shostname . )
-Then an entry is added to
-.Pa slip.hosts
-that looks like:
-.Pp
-.Bd -literal -offset indent -compact
-Sfoo	`hostname`	foo	netmask
-.Ed
-.Pp
-where
-.Em `hostname`
-will be evaluated by
-.Xr sh 1
-to the local host name and
-.Em netmask
-is the local host IP netmask.
-.Pp
-Note that
-.Nm
-must be setuid to root and, while not a security hole, moral defectives
-can use it to place terminal lines in an unusable state and/or deny
-access to legitimate users of a remote slip line.
-To prevent this,
-.Nm
-is installed as user
-.Em root ,
-group
-.Em network
-and mode 4550 so that only members of group
-.Em network
-may run
-.Nm .
-The system administrator should make sure that all legitimate users
-are a member of the correct group.
-.Sh DIAGNOSTICS
-The
-.Nm
-utility logs various information to the system log daemon,
-.Xr syslogd 8 ,
-with a facility code of
-.Em daemon .
-The messages are listed here, grouped by severity level.
-.Pp
-.Sy Error Severity
-.Bl -tag -width Ds -compact
-.It Sy ioctl (TCGETS): Em reason
-A
-.Dv TCGETS
-.Fn ioctl
-to get the line parameters failed.
-.Pp
-.It Sy ioctl (TCSETS): Em reason
-A
-.Dv TCSETS
-.Fn ioctl
-to set the line parameters failed.
-.Pp
-.It Sy /etc/sliphome/slip.hosts: Em reason
-The
-.Pa /etc/sliphome/slip.hosts
-file could not be opened.
-.Pp
-.It Sy access denied for Em user
-No entry for
-.Em user
-was found in
-.Pa /etc/sliphome/slip.hosts .
-.El
-.Pp
-.Sy Notice Severity
-.Bl -tag -width Ds -compact
-.It Sy "attaching slip unit" Em unit Sy for Ar loginname
-.Tn SLIP
-unit
-.Em unit
-was successfully attached.
-.El
-.Sh SEE ALSO
-.Xr slattach 8 ,
-.Xr syslogd 8
-.Pp
-.Pa /usr/share/examples/sliplogin
-.Sh HISTORY
-The
-.Nm
-utility appeared in
-.Bx 4.3 Reno .
diff --git a/usr.sbin/sliplogin/sliplogin.c b/usr.sbin/sliplogin/sliplogin.c
deleted file mode 100644
index dafdfd4..0000000
--- a/usr.sbin/sliplogin/sliplogin.c
+++ /dev/null
@@ -1,544 +0,0 @@
-/*-
- * Copyright (c) 1990, 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.
- * 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.
- */
-
-#ifndef lint
-static char copyright[] =
-"@(#) Copyright (c) 1990, 1993\n\
-	The Regents of the University of California.  All rights reserved.\n";
-#endif /* not lint */
-
-#ifndef lint
-static char sccsid[] = "@(#)sliplogin.c	8.2 (Berkeley) 2/1/94";
-static char rscid[] = "@(#)$FreeBSD$";
-#endif /* not lint */
-
-/*
- * sliplogin.c
- * [MUST BE RUN SUID, SLOPEN DOES A SUSER()!]
- *
- * This program initializes its own tty port to be an async TCP/IP interface.
- * It sets the line discipline to slip, invokes a shell script to initialize
- * the network interface, then pauses forever waiting for hangup.
- *
- * It is a remote descendant of several similar programs with incestuous ties:
- * - Kirk Smith's slipconf, modified by Richard Johnsson @ DEC WRL.
- * - slattach, probably by Rick Adams but touched by countless hordes.
- * - the original sliplogin for 4.2bsd, Doug Kingston the mover behind it.
- *
- * There are two forms of usage:
- *
- * "sliplogin"
- * Invoked simply as "sliplogin", the program looks up the username
- * in the file /etc/slip.hosts.
- * If an entry is found, the line on fd0 is configured for SLIP operation
- * as specified in the file.
- *
- * "sliplogin IPhostlogin </dev/ttyb"
- * Invoked by root with a username, the name is looked up in the
- * /etc/slip.hosts file and if found fd0 is configured as in case 1.
- */
-
-#include <sys/param.h>
-#include <sys/socket.h>
-#include <sys/file.h>
-#include <sys/stat.h>
-#include <syslog.h>
-#include <netdb.h>
-
-#include <termios.h>
-#include <sys/ioctl.h>
-#include <net/slip.h>
-#include <net/if.h>
-#include <netinet/in.h>
-
-#include <stdio.h>
-#include <errno.h>
-#include <ctype.h>
-#include <paths.h>
-#include <string.h>
-#include <unistd.h>
-#include <stdlib.h>
-#include <signal.h>
-#include "pathnames.h"
-
-extern char **environ;
-
-static char *restricted_environ[] = {
-	"PATH=" _PATH_STDPATH,
-	NULL
-};
-
-int	unit;
-int	slip_mode;
-speed_t speed;
-int	uid;
-int     keepal;
-int     outfill;
-int     slunit;
-char	loginargs[BUFSIZ];
-char	loginfile[MAXPATHLEN];
-char	loginname[BUFSIZ];
-static char raddr[32];			/* remote address */
-char ifname[IFNAMSIZ];          	/* interface name */
-static 	char pidfilename[MAXPATHLEN];   /* name of pid file */
-static 	char iffilename[MAXPATHLEN];    /* name of if file */
-static	pid_t	pid;			/* our pid */
-
-char *
-make_ipaddr(void)
-{
-static char address[20] ="";
-struct hostent *he;
-unsigned long ipaddr;
-
-address[0] = '\0';
-if ((he = gethostbyname(raddr)) != NULL) {
-	ipaddr = ntohl(*(long *)he->h_addr_list[0]);
-	sprintf(address, "%lu.%lu.%lu.%lu",
-		ipaddr >> 24,
-		(ipaddr & 0x00ff0000) >> 16,
-		(ipaddr & 0x0000ff00) >> 8,
-		(ipaddr & 0x000000ff));
-	}
-
-return address;
-}
-
-struct slip_modes {
-	char	*sm_name;
-	int	sm_or_flag;
-	int	sm_and_flag;
-}	 modes[] = {
-	"normal",	0        , 0        ,
-	"compress",	IFF_LINK0, IFF_LINK2,
-	"noicmp",	IFF_LINK1, 0        ,
-	"autocomp",	IFF_LINK2, IFF_LINK0,
-};
-
-void
-findid(name)
-	char *name;
-{
-	FILE *fp;
-	static char slopt[5][16];
-	static char laddr[16];
-	static char mask[16];
-	char   slparmsfile[MAXPATHLEN];
-	char user[16];
-	char buf[128];
-	int i, j, n;
-
-	environ = restricted_environ; /* minimal protection for system() */
-
-	(void)strncpy(loginname, name, sizeof(loginname)-1);
-	loginname[sizeof(loginname)-1] = '\0';
-
-	if ((fp = fopen(_PATH_ACCESS, "r")) == NULL) {
-	accfile_err:
-		syslog(LOG_ERR, "%s: %m\n", _PATH_ACCESS);
-		exit(1);
-	}
-	while (fgets(loginargs, sizeof(loginargs) - 1, fp)) {
-		if (ferror(fp))
-			goto accfile_err;
-		if (loginargs[0] == '#' || isspace(loginargs[0]))
-			continue;
-		n = sscanf(loginargs, "%15s%*[ \t]%15s%*[ \t]%15s%*[ \t]%15s%*[ \t]%15s%*[ \t]%15s%*[ \t]%15s%*[ \t]%15s%*[ \t]%15s\n",
-                        user, laddr, raddr, mask, slopt[0], slopt[1],
-			slopt[2], slopt[3], slopt[4]);
-		if (n < 4) {
-			syslog(LOG_ERR, "%s: wrong format\n", _PATH_ACCESS);
-			exit(1);
-		}
-		if (strcmp(user, name) != 0)
-			continue;
-
-		(void) fclose(fp);
-
-		slip_mode = 0;
-		for (i = 0; i < n - 4; i++) {
-			for (j = 0; j < sizeof(modes)/sizeof(struct slip_modes);
-				j++) {
-				if (strcmp(modes[j].sm_name, slopt[i]) == 0) {
-					slip_mode |= (modes[j].sm_or_flag);
-					slip_mode &= ~(modes[j].sm_and_flag);
-					break;
-				}
-			}
-		}
-
-		/*
-		 * we've found the guy we're looking for -- see if
-		 * there's a login file we can use.  First check for
-		 * one specific to this host.  If none found, try for
-		 * a generic one.
-		 */
-		(void)snprintf(loginfile, sizeof(loginfile), "%s.%s", 
-		    _PATH_SLIP_LOGIN, name);
-		if (access(loginfile, R_OK|X_OK) != 0) {
-			(void)strncpy(loginfile, _PATH_SLIP_LOGIN,
-			    sizeof(loginfile) - 1);
-			loginfile[sizeof(loginfile) - 1] = '\0';
-			if (access(loginfile, R_OK|X_OK)) {
-				syslog(LOG_ERR,
-				       "access denied for %s - no %s\n",
-				       name, _PATH_SLIP_LOGIN);
-				exit(5);
-			}
-		}
-		(void)snprintf(slparmsfile, sizeof(slparmsfile), "%s.%s", _PATH_SLPARMS, name);
-		if (access(slparmsfile, R_OK|X_OK) != 0) {
-			(void)strncpy(slparmsfile, _PATH_SLPARMS, sizeof(slparmsfile)-1);
-			slparmsfile[sizeof(slparmsfile)-1] = '\0';
-			if (access(slparmsfile, R_OK|X_OK))
-				*slparmsfile = '\0';
-		}
-		keepal = outfill = 0;
-		slunit = -1;
-		if (*slparmsfile) {
-			if ((fp = fopen(slparmsfile, "r")) == NULL) {
-			slfile_err:
-				syslog(LOG_ERR, "%s: %m\n", slparmsfile);
-				exit(1);
-			}
-			n = 0;
-			while (fgets(buf, sizeof(buf) - 1, fp) != NULL) {
-				if (ferror(fp))
-					goto slfile_err;
-				if (buf[0] == '#' || isspace(buf[0]))
-					continue;
-				n = sscanf(buf, "%d %d %d", &keepal, &outfill, &slunit);
-				if (n < 1) {
-				slwrong_fmt:
-					syslog(LOG_ERR, "%s: wrong format\n", slparmsfile);
-					exit(1);
-				}
-				(void) fclose(fp);
-				break;
-			}
-			if (n == 0)
-				goto slwrong_fmt;
-		}
-
-		return;
-	}
-	syslog(LOG_ERR, "SLIP access denied for %s\n", name);
-	exit(4);
-	/* NOTREACHED */
-}
-
-char *
-sigstr(s)
-	int s;
-{
-	static char buf[32];
-
-	switch (s) {
-	case SIGHUP:	return("HUP");
-	case SIGINT:	return("INT");
-	case SIGQUIT:	return("QUIT");
-	case SIGILL:	return("ILL");
-	case SIGTRAP:	return("TRAP");
-	case SIGIOT:	return("IOT");
-	case SIGEMT:	return("EMT");
-	case SIGFPE:	return("FPE");
-	case SIGKILL:	return("KILL");
-	case SIGBUS:	return("BUS");
-	case SIGSEGV:	return("SEGV");
-	case SIGSYS:	return("SYS");
-	case SIGPIPE:	return("PIPE");
-	case SIGALRM:	return("ALRM");
-	case SIGTERM:	return("TERM");
-	case SIGURG:	return("URG");
-	case SIGSTOP:	return("STOP");
-	case SIGTSTP:	return("TSTP");
-	case SIGCONT:	return("CONT");
-	case SIGCHLD:	return("CHLD");
-	case SIGTTIN:	return("TTIN");
-	case SIGTTOU:	return("TTOU");
-	case SIGIO:	return("IO");
-	case SIGXCPU:	return("XCPU");
-	case SIGXFSZ:	return("XFSZ");
-	case SIGVTALRM:	return("VTALRM");
-	case SIGPROF:	return("PROF");
-	case SIGWINCH:	return("WINCH");
-#ifdef SIGLOST
-	case SIGLOST:	return("LOST");
-#endif
-	case SIGUSR1:	return("USR1");
-	case SIGUSR2:	return("USR2");
-	}
-	(void)snprintf(buf, sizeof(buf), "sig %d", s);
-	return(buf);
-}
-
-void
-hup_handler(s)
-	int s;
-{
-	char logoutfile[MAXPATHLEN];
-
-	(void) close(0);
-	seteuid(0);
-	(void)snprintf(logoutfile, sizeof(logoutfile), "%s.%s",
-	    _PATH_SLIP_LOGOUT, loginname);
-	if (access(logoutfile, R_OK|X_OK) != 0) {
-		(void)strncpy(logoutfile, _PATH_SLIP_LOGOUT,
-		    sizeof(logoutfile) - 1);
-		logoutfile[sizeof(logoutfile) - 1] = '\0';
-	}
-	if (access(logoutfile, R_OK|X_OK) == 0) {
-		char logincmd[2*MAXPATHLEN+32];
-
-		(void) snprintf(logincmd, sizeof(logincmd), "%s %d %ld %s", logoutfile, unit, speed, loginargs);
-		(void) system(logincmd);
-	}
-	syslog(LOG_INFO, "closed %s slip unit %d (%s)\n", loginname, unit,
-	       sigstr(s));
-	if (unlink(pidfilename) < 0 && errno != ENOENT)
-		syslog(LOG_WARNING, "unable to delete pid file: %m");
-	if (unlink(iffilename) < 0 && errno != ENOENT)
-		syslog(LOG_WARNING, "unable to delete if file: %m");
-	exit(1);
-	/* NOTREACHED */
-}
-
-
-/* Modify the slip line mode and add any compression or no-icmp flags. */
-void line_flags(unit)
-	int unit;
-{
-	struct ifreq ifr;
-	int s;
-
-	/* open a socket as the handle to the interface */
-	s = socket(AF_INET, SOCK_DGRAM, 0);
-	if (s < 0) {
-		syslog(LOG_ERR, "socket: %m");
-		exit(1);
-	}
-	sprintf(ifr.ifr_name, "sl%d", unit);
-
-	/* get the flags for the interface */
-	if (ioctl(s, SIOCGIFFLAGS, (caddr_t)&ifr) < 0) {
-		syslog(LOG_ERR, "ioctl (SIOCGIFFLAGS): %m");
-		exit(1);
-        }
-
-	/* Assert any compression or no-icmp flags. */
-#define SLMASK (~(IFF_LINK0 | IFF_LINK1 | IFF_LINK2))
-	ifr.ifr_flags &= SLMASK;
-	ifr.ifr_flags |= slip_mode;
-	if (ioctl(s, SIOCSIFFLAGS, (caddr_t)&ifr) < 0) {
-		syslog(LOG_ERR, "ioctl (SIOCSIFFLAGS): %m");
-		exit(1);
-	}
-        close(s);
-}
-
-
-int
-main(argc, argv)
-	int argc;
-	char *argv[];
-{
-	int fd, s, ldisc;
-	char *name;
-	struct termios tios;
-	char logincmd[2*BUFSIZ+32];
-
-	FILE *pidfile;				/* pid file */
-	FILE *iffile;				/* interfaces file */
-	char *p;
-	int n;
-	char devnam[MAXPATHLEN] = _PATH_TTY;   /* Device name */
-
-	if ((name = strrchr(argv[0], '/')) == NULL)
-		name = argv[0];
-	s = getdtablesize();
-	for (fd = 3 ; fd < s ; fd++)
-		(void) close(fd);
-	openlog(name, LOG_PID|LOG_PERROR, LOG_DAEMON);
-	uid = getuid();
-	if (argc > 1) {
-		findid(argv[1]);
-
-		/*
-		 * Disassociate from current controlling terminal, if any,
-		 * and ensure that the slip line is our controlling terminal.
-		 */
-		if (daemon(1, 1)) {
-			syslog(LOG_ERR, "daemon(1, 1): %m");
-			exit(1);
-		}
-		if (argc > 2) {
-			if ((fd = open(argv[2], O_RDWR)) == -1) {
-				syslog(LOG_ERR, "open %s: %m", argv[2]);
-				exit(2);
-			}
-			(void) dup2(fd, 0);
-			if (fd > 2)
-				close(fd);
-		}
-		if (ioctl(0, TIOCSCTTY, 0) == -1) {
-			syslog(LOG_ERR, "ioctl (TIOCSCTTY): %m");
-			exit(1);
-		}
-		if (tcsetpgrp(0, getpid()) < 0) {
-			syslog(LOG_ERR, "tcsetpgrp failed: %m");
-			exit(1);
-		}
-	} else {
-		if ((name = getlogin()) == NULL) {
-			syslog(LOG_ERR, "access denied - login name not found\n");
-			exit(1);
-		}
-		findid(name);
-	}
-	(void) fchmod(0, 0600);
-	(void) fprintf(stderr, "starting slip login for %s\n", loginname);
-        (void) fprintf(stderr, "your address is %s\n\n", make_ipaddr());
-
-	(void) fflush(stderr);
-	sleep(1);
-
-	/* set up the line parameters */
-	if (tcgetattr(0, &tios) < 0) {
-		syslog(LOG_ERR, "tcgetattr: %m");
-		exit(1);
-	}
-	cfmakeraw(&tios);
-	if (tcsetattr(0, TCSAFLUSH, &tios) < 0) {
-		syslog(LOG_ERR, "tcsetattr: %m");
-		exit(1);
-	}
-	speed = cfgetispeed(&tios);
-
-	ldisc = SLIPDISC;
-	if (ioctl(0, TIOCSETD, &ldisc) < 0) {
-		syslog(LOG_ERR, "ioctl(TIOCSETD): %m");
-		exit(1);
-	}
-	if (slunit >= 0 && ioctl(0, SLIOCSUNIT, &slunit) < 0) {
-		syslog(LOG_ERR, "ioctl (SLIOCSUNIT): %m");
-		exit(1);
-	}
-	/* find out what unit number we were assigned */
-	if (ioctl(0, SLIOCGUNIT, &unit) < 0) {
-		syslog(LOG_ERR, "ioctl (SLIOCGUNIT): %m");
-		exit(1);
-	}
-	(void) signal(SIGHUP, hup_handler);
-	(void) signal(SIGTERM, hup_handler);
-
-	if (keepal > 0) {
-		(void) signal(SIGURG, hup_handler);
-		if (ioctl(0, SLIOCSKEEPAL, &keepal) < 0) {
-			syslog(LOG_ERR, "ioctl(SLIOCSKEEPAL): %m");
-			exit(1);
-		}
-	}
-	if (outfill > 0 && ioctl(0, SLIOCSOUTFILL, &outfill) < 0) {
-		syslog(LOG_ERR, "ioctl(SLIOCSOUTFILL): %m");
-		exit(1);
-	}
-
-        /* write pid to file */
-	pid = getpid();
-	(void) sprintf(ifname, "sl%d", unit);
-	(void) sprintf(pidfilename, "%s%s.pid", _PATH_VARRUN, ifname);
-	if ((pidfile = fopen(pidfilename, "w")) != NULL) {
-		fprintf(pidfile, "%d\n", pid);
-		(void) fclose(pidfile);
-	} else {
-		syslog(LOG_ERR, "Failed to create pid file %s: %m",
-				pidfilename);
-		pidfilename[0] = 0;
-	}
-
-        /* write interface unit number to file */
-	p = ttyname(0);
-	if (p)
-		strcpy(devnam, p);
-	for (n = strlen(devnam); n > 0; n--) 
-		if (devnam[n] == '/') {
-			n++;
-			break;
-		}
-	(void) sprintf(iffilename, "%s%s.if", _PATH_VARRUN, &devnam[n]);
-	if ((iffile = fopen(iffilename, "w")) != NULL) {
-		fprintf(iffile, "sl%d\n", unit); 
-		(void) fclose(iffile);
-	} else {
-		syslog(LOG_ERR, "Failed to create if file %s: %m", iffilename);
-		iffilename[0] = 0;  
-	}
-
-
-	syslog(LOG_INFO, "attaching slip unit %d for %s\n", unit, loginname);
-	(void)snprintf(logincmd, sizeof(logincmd), "%s %d %ld %s", loginfile, unit, speed,
-		      loginargs);
-	/*
-	 * aim stdout and errout at /dev/null so logincmd output won't
-	 * babble into the slip tty line.
-	 */
-	(void) close(1);
-	if ((fd = open(_PATH_DEVNULL, O_WRONLY)) != 1) {
-		if (fd < 0) {
-			syslog(LOG_ERR, "open %s: %m", _PATH_DEVNULL);
-			exit(1);
-		}
-		(void) dup2(fd, 1);
-		(void) close(fd);
-	}
-	(void) dup2(1, 2);
-
-	/*
-	 * Run login and logout scripts as root (real and effective);
-	 * current route(8) is setuid root, and checks the real uid
-	 * to see whether changes are allowed (or just "route get").
-	 */
-	(void) setuid(0);
-	if (s = system(logincmd)) {
-		syslog(LOG_ERR, "%s login failed: exit status %d from %s",
-		       loginname, s, loginfile);
-		exit(6);
-	}
-
-	/* Handle any compression or no-icmp flags. */
-	line_flags(unit);
-
-	/* reset uid to users' to allow the user to give a signal. */
-	seteuid(uid);
-	/* twiddle thumbs until we get a signal */
-	while (1)
-		sigpause(0);
-
-	/* NOTREACHED */
-}