slattach.c revision 1.13 
1/*
2 * Copyright (c) 1988, 1993
3 *	The Regents of the University of California.  All rights reserved.
4 *
5 * This code is derived from software contributed to Berkeley by
6 * Rick Adams.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 *    notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 *    notice, this list of conditions and the following disclaimer in the
15 *    documentation and/or other materials provided with the distribution.
16 * 3. All advertising materials mentioning features or use of this software
17 *    must display the following acknowledgement:
18 *	This product includes software developed by the University of
19 *	California, Berkeley and its contributors.
20 * 4. Neither the name of the University nor the names of its contributors
21 *    may be used to endorse or promote products derived from this software
22 *    without specific prior written permission.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * SUCH DAMAGE.
35 */
36
37#ifndef lint
38static char copyright[] =
39"@(#) Copyright (c) 1988, 1993\n\
40	The Regents of the University of California.  All rights reserved.\n";
41#endif /* not lint */
42
43#ifndef lint
44/*static char sccsid[] = "from: @(#)slattach.c	8.2 (Berkeley) 1/7/94";*/
45static char *rcsid = "$Id: slattach.c,v 1.13 1994/10/31 04:38:09 cgd Exp $";
46#endif /* not lint */
47
48#include <sys/param.h>
49#include <sys/socket.h>
50
51#include <net/if.h>
52#include <netinet/in.h>
53
54#include <err.h>
55#include <fcntl.h>
56#include <netdb.h>
57#include <paths.h>
58#include <stdio.h>
59#include <stdlib.h>
60#include <string.h>
61#include <termios.h>
62
63int	speed = 9600;
64int	slipdisc = SLIPDISC;
65
66char	devicename[32];
67
68void	usage __P((void));
69
70int
71main(argc, argv)
72	int argc;
73	char *argv[];
74{
75	register int fd;
76	register char *dev = argv[1];
77	struct termios tty;
78	tcflag_t cflag = HUPCL;
79	int ch;
80
81	while ((ch = getopt(argc, argv, "hms:")) != -1) {
82		switch (ch) {
83		case 'h':
84			cflag |= CRTSCTS;
85			break;
86		case 'm':
87			cflag &= ~HUPCL;
88			break;
89		case 's':
90			speed = atoi(optarg);
91			break;
92		case '?':
93		default:
94			usage();
95		}
96	}
97	argc -= optind;
98	argv += optind;
99
100	if (argc != 1)
101		usage();
102
103	dev = *argv;
104	if (strncmp(_PATH_DEV, dev, sizeof(_PATH_DEV) - 1)) {
105		(void)snprintf(devicename, sizeof(devicename),
106		    "%s%s", _PATH_DEV, dev);
107		dev = devicename;
108	}
109	if ((fd = open(dev, O_RDWR | O_NDELAY)) < 0) {
110		perror(dev);
111		exit(1);
112	}
113	tty.c_cflag = CREAD | CS8 | cflag;
114	tty.c_iflag = 0;
115	tty.c_lflag = 0;
116	tty.c_oflag = 0;
117	tty.c_cc[VMIN] = 1;
118	tty.c_cc[VTIME] = 0;
119	cfsetspeed(&tty, speed);
120	if (tcsetattr(fd, TCSADRAIN, &tty) < 0)
121		err(1, "tcsetattr");
122	if (ioctl(fd, TIOCSDTR, 0) < 0)
123		err(1, "TIOCSDTR");
124	if (ioctl(fd, TIOCSETD, &slipdisc) < 0)
125		err(1, "TIOCSETD");
126
127	if (fork() > 0)
128		exit(0);
129	for (;;)
130		sigpause(0L);
131}
132
133void
134usage()
135{
136
137	(void)fprintf(stderr, "usage: slattach [-hm] [-s baudrate] ttyname\n");
138	exit(1);
139}
140