slattach.c revision 1.28 
1/*	$NetBSD: slattach.c,v 1.28 2004/01/05 23:23:33 jmmv 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. Neither the name of the University nor the names of its contributors
19 *    may be used to endorse or promote products derived from this software
20 *    without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 */
34
35#include <sys/cdefs.h>
36#ifndef lint
37__COPYRIGHT("@(#) Copyright (c) 1988, 1993\n\
38	The Regents of the University of California.  All rights reserved.\n");
39#endif /* not lint */
40
41#ifndef lint
42#if 0
43static char sccsid[] = "@(#)slattach.c	8.2 (Berkeley) 1/7/94";
44#else
45__RCSID("$NetBSD: slattach.c,v 1.28 2004/01/05 23:23:33 jmmv Exp $");
46#endif
47#endif /* not lint */
48
49#include <sys/param.h>
50#include <sys/socket.h>
51#include <sys/types.h>
52#include <sys/ioctl.h>
53
54#include <net/if.h>
55#include <netinet/in.h>
56
57#include <err.h>
58#include <fcntl.h>
59#include <netdb.h>
60#include <paths.h>
61#include <signal.h>
62#include <stdio.h>
63#include <stdlib.h>
64#include <string.h>
65#include <termios.h>
66#include <unistd.h>
67
68int	speed = 9600;
69int	slipdisc = SLIPDISC;
70
71char	devicename[32];
72
73int	main __P((int, char *[]));
74int	ttydisc __P((char *));
75void	usage __P((void));
76
77int
78main(argc, argv)
79	int argc;
80	char *argv[];
81{
82	int fd;
83	char *dev = argv[1];
84	struct termios tty;
85	tcflag_t cflag = HUPCL;
86	int ch;
87	sigset_t nsigset;
88	int opt_detach = 1;
89
90	while ((ch = getopt(argc, argv, "hHlmns:t:")) != -1) {
91		switch (ch) {
92		case 'h':
93			cflag |= CRTSCTS;
94			break;
95		case 'H':
96			cflag |= CDTRCTS;
97			break;
98		case 'l':
99			cflag |= CLOCAL;
100			break;
101		case 'm':
102			cflag &= ~HUPCL;
103			break;
104		case 'n':
105			opt_detach = 0;
106			break;
107		case 's':
108			speed = atoi(optarg);
109			break;
110		case 'r': case 't':
111			slipdisc = ttydisc(optarg);
112			break;
113		case '?':
114		default:
115			usage();
116		}
117	}
118	argc -= optind;
119	argv += optind;
120
121	if (argc != 1)
122		usage();
123
124	dev = *argv;
125	if (strncmp(_PATH_DEV, dev, sizeof(_PATH_DEV) - 1)) {
126		(void)snprintf(devicename, sizeof(devicename),
127		    "%s%s", _PATH_DEV, dev);
128		dev = devicename;
129	}
130	if ((fd = open(dev, O_RDWR | O_NDELAY)) < 0)
131		err(1, "%s", dev);
132	tty.c_cflag = CREAD | CS8 | cflag;
133	tty.c_iflag = 0;
134	tty.c_lflag = 0;
135	tty.c_oflag = 0;
136	tty.c_cc[VMIN] = 1;
137	tty.c_cc[VTIME] = 0;
138	cfsetspeed(&tty, speed);
139	if (tcsetattr(fd, TCSADRAIN, &tty) < 0)
140		err(1, "tcsetattr");
141	if (ioctl(fd, TIOCSDTR, 0) < 0)
142		err(1, "TIOCSDTR");
143	if (ioctl(fd, TIOCSETD, &slipdisc) < 0)
144		err(1, "TIOCSETD");
145	if (opt_detach && daemon(0, 0) != 0)
146		err(1, "couldn't detach");
147	sigemptyset(&nsigset);
148	for (;;)
149		sigsuspend(&nsigset);
150}
151
152int
153ttydisc(name)
154     char *name;
155{
156	if (strcmp(name, "slip") == 0)
157		return(SLIPDISC);
158#ifdef STRIPDISC
159	else if (strcmp(name, "strip") == 0)
160  		return(STRIPDISC);
161#endif
162	else
163		usage();
164	/* NOTREACHED */
165	return -1;
166}
167
168void
169usage()
170{
171
172	(void)fprintf(stderr,
173	    "usage: %s [-t ldisc] [-hHlmn] [-s baudrate] ttyname\n",
174		getprogname());
175	exit(1);
176}
177