slattach.c revision 1.17 
1/*	$NetBSD: slattach.c,v 1.17 1996/05/19 21:57:39 jonathan Exp $	*/
2
3/*
4 * Copyright (c) 1988, 1993
5 *	The Regents of the University of California.  All rights reserved.
6 *
7 * This code is derived from software contributed to Berkeley by
8 * Rick Adams.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 *    notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 *    notice, this list of conditions and the following disclaimer in the
17 *    documentation and/or other materials provided with the distribution.
18 * 3. All advertising materials mentioning features or use of this software
19 *    must display the following acknowledgement:
20 *	This product includes software developed by the University of
21 *	California, Berkeley and its contributors.
22 * 4. Neither the name of the University nor the names of its contributors
23 *    may be used to endorse or promote products derived from this software
24 *    without specific prior written permission.
25 *
26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
29 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 * SUCH DAMAGE.
37 */
38
39#ifndef lint
40static char copyright[] =
41"@(#) Copyright (c) 1988, 1993\n\
42	The Regents of the University of California.  All rights reserved.\n";
43#endif /* not lint */
44
45#ifndef lint
46#if 0
47static char sccsid[] = "@(#)slattach.c	8.2 (Berkeley) 1/7/94";
48#else
49static char rcsid[] = "$NetBSD: slattach.c,v 1.17 1996/05/19 21:57:39 jonathan Exp $";
50#endif
51#endif /* not lint */
52
53#include <sys/param.h>
54#include <sys/socket.h>
55#include <sys/types.h>
56#include <sys/ioctl.h>
57
58#include <net/if.h>
59#include <netinet/in.h>
60
61#include <err.h>
62#include <fcntl.h>
63#include <netdb.h>
64#include <paths.h>
65#include <signal.h>
66#include <stdio.h>
67#include <stdlib.h>
68#include <string.h>
69#include <termios.h>
70#include <unistd.h>
71
72int	speed = 9600;
73int	slipdisc = SLIPDISC;
74
75char	devicename[32];
76
77void	usage __P((void));
78
79int ttydisc __P((char *));
80
81
82int
83main(argc, argv)
84	int argc;
85	char *argv[];
86{
87	register int fd;
88	register char *dev = argv[1];
89	struct termios tty;
90	tcflag_t cflag = HUPCL;
91	int ch;
92	sigset_t sigset;
93
94	while ((ch = getopt(argc, argv, "hms:t:")) != -1) {
95		switch (ch) {
96		case 'h':
97			cflag |= CRTSCTS;
98			break;
99		case 'm':
100			cflag &= ~HUPCL;
101			break;
102		case 's':
103			speed = atoi(optarg);
104			break;
105		case 'r': case 't':
106			slipdisc = ttydisc(optarg);
107			break;
108		case '?':
109		default:
110			usage();
111		}
112	}
113	argc -= optind;
114	argv += optind;
115
116	if (argc != 1)
117		usage();
118
119	dev = *argv;
120	if (strncmp(_PATH_DEV, dev, sizeof(_PATH_DEV) - 1)) {
121		(void)snprintf(devicename, sizeof(devicename),
122		    "%s%s", _PATH_DEV, dev);
123		dev = devicename;
124	}
125	if ((fd = open(dev, O_RDWR | O_NDELAY)) < 0) {
126		perror(dev);
127		exit(1);
128	}
129	tty.c_cflag = CREAD | CS8 | cflag;
130	tty.c_iflag = 0;
131	tty.c_lflag = 0;
132	tty.c_oflag = 0;
133	tty.c_cc[VMIN] = 1;
134	tty.c_cc[VTIME] = 0;
135	cfsetspeed(&tty, speed);
136	if (tcsetattr(fd, TCSADRAIN, &tty) < 0)
137		err(1, "tcsetattr");
138	if (ioctl(fd, TIOCSDTR, 0) < 0)
139		err(1, "TIOCSDTR");
140	if (ioctl(fd, TIOCSETD, &slipdisc) < 0)
141		err(1, "TIOCSETD");
142
143	if (fork() > 0)
144		exit(0);
145	sigemptyset(&sigset);
146	for (;;)
147		sigsuspend(&sigset);
148}
149
150int
151ttydisc(name)
152     char *name;
153{
154	if (strcmp(name, "slip") == 0)
155		return(SLIPDISC);
156#ifdef STRIPDISC
157	else if (strcmp(name, "strip") == 0)
158  		return(STRIPDISC);
159#endif
160	else
161		usage();
162}
163
164void
165usage()
166{
167
168	(void)fprintf(stderr,
169		      "usage: slattach [-t ldisc] [-hm] [-s baudrate] ttyname\n");
170	exit(1);
171}
172