slattach.c revision 1.29 
1/*	$NetBSD: slattach.c,v 1.29 2005/02/05 12:38:58 xtraeme 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 1.29 2005/02/05 12:38:58 xtraeme 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	ttydisc(char *);
74void	usage(void);
75
76int
77main(int argc, char *argv[])
78{
79	int fd;
80	char *dev = argv[1];
81	struct termios tty;
82	tcflag_t cflag = HUPCL;
83	int ch;
84	sigset_t nsigset;
85	int opt_detach = 1;
86
87	while ((ch = getopt(argc, argv, "hHlmns:t:")) != -1) {
88		switch (ch) {
89		case 'h':
90			cflag |= CRTSCTS;
91			break;
92		case 'H':
93			cflag |= CDTRCTS;
94			break;
95		case 'l':
96			cflag |= CLOCAL;
97			break;
98		case 'm':
99			cflag &= ~HUPCL;
100			break;
101		case 'n':
102			opt_detach = 0;
103			break;
104		case 's':
105			speed = atoi(optarg);
106			break;
107		case 'r': case 't':
108			slipdisc = ttydisc(optarg);
109			break;
110		case '?':
111		default:
112			usage();
113		}
114	}
115	argc -= optind;
116	argv += optind;
117
118	if (argc != 1)
119		usage();
120
121	dev = *argv;
122	if (strncmp(_PATH_DEV, dev, sizeof(_PATH_DEV) - 1)) {
123		(void)snprintf(devicename, sizeof(devicename),
124		    "%s%s", _PATH_DEV, dev);
125		dev = devicename;
126	}
127	if ((fd = open(dev, O_RDWR | O_NDELAY)) < 0)
128		err(1, "%s", dev);
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	if (opt_detach && daemon(0, 0) != 0)
143		err(1, "couldn't detach");
144	sigemptyset(&nsigset);
145	for (;;)
146		sigsuspend(&nsigset);
147}
148
149int
150ttydisc(char *name)
151{
152	if (strcmp(name, "slip") == 0)
153		return(SLIPDISC);
154#ifdef STRIPDISC
155	else if (strcmp(name, "strip") == 0)
156  		return(STRIPDISC);
157#endif
158	else
159		usage();
160	/* NOTREACHED */
161	return -1;
162}
163
164void
165usage(void)
166{
167
168	(void)fprintf(stderr,
169	    "usage: %s [-t ldisc] [-hHlmn] [-s baudrate] ttyname\n",
170		getprogname());
171	exit(1);
172}
173