1/*	$NetBSD: slattach.c,v 1.31 2011/08/27 18:55:21 joerg 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\
38 The Regents of the University of California.  All rights reserved.");
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 1.31 2011/08/27 18:55:21 joerg 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 <errno.h>
59#include <fcntl.h>
60#include <netdb.h>
61#include <paths.h>
62#include <signal.h>
63#include <stdio.h>
64#include <stdlib.h>
65#include <string.h>
66#include <termios.h>
67#include <unistd.h>
68
69static int	speed = 9600;
70static int	slipdisc = SLIPDISC;
71
72static char	devicename[32];
73
74static int	ttydisc(char *);
75__dead static void	usage(void);
76
77int
78main(int argc, char *argv[])
79{
80	int fd;
81	char *dev = argv[1];
82	struct termios tty;
83	tcflag_t cflag = HUPCL;
84	int ch;
85	sigset_t nsigset;
86	int opt_detach = 1;
87
88	while ((ch = getopt(argc, argv, "hHlmns:t:")) != -1) {
89		switch (ch) {
90		case 'h':
91			cflag |= CRTSCTS;
92			break;
93		case 'H':
94			cflag |= CDTRCTS;
95			break;
96		case 'l':
97			cflag |= CLOCAL;
98			break;
99		case 'm':
100			cflag &= ~HUPCL;
101			break;
102		case 'n':
103			opt_detach = 0;
104			break;
105		case 's':
106			speed = atoi(optarg);
107			break;
108		case 'r': case 't':
109			slipdisc = ttydisc(optarg);
110			break;
111		case '?':
112		default:
113			usage();
114		}
115	}
116	argc -= optind;
117	argv += optind;
118
119	if (argc != 1)
120		usage();
121
122	dev = *argv;
123	if (strncmp(_PATH_DEV, dev, sizeof(_PATH_DEV) - 1)) {
124		(void)snprintf(devicename, sizeof(devicename),
125		    "%s%s", _PATH_DEV, dev);
126		dev = devicename;
127	}
128	if ((fd = open(dev, O_RDWR | O_NDELAY)) < 0)
129		err(1, "%s", dev);
130	tty.c_cflag = CREAD | CS8 | cflag;
131	tty.c_iflag = 0;
132	tty.c_lflag = 0;
133	tty.c_oflag = 0;
134	tty.c_cc[VMIN] = 1;
135	tty.c_cc[VTIME] = 0;
136	cfsetspeed(&tty, speed);
137	if (tcsetattr(fd, TCSADRAIN, &tty) < 0)
138		err(1, "tcsetattr");
139	if (ioctl(fd, TIOCSDTR, 0) < 0 && errno != ENOTTY)
140		err(1, "TIOCSDTR");
141	if (ioctl(fd, TIOCSETD, &slipdisc) < 0)
142		err(1, "TIOCSETD");
143	if (opt_detach && daemon(0, 0) != 0)
144		err(1, "couldn't detach");
145	sigemptyset(&nsigset);
146	for (;;)
147		sigsuspend(&nsigset);
148}
149
150static int
151ttydisc(char *name)
152{
153	if (strcmp(name, "slip") == 0)
154		return(SLIPDISC);
155#ifdef STRIPDISC
156	else if (strcmp(name, "strip") == 0)
157  		return(STRIPDISC);
158#endif
159	else
160		usage();
161	/* NOTREACHED */
162	return -1;
163}
164
165static void
166usage(void)
167{
168
169	(void)fprintf(stderr,
170	    "usage: %s [-t ldisc] [-hHlmn] [-s baudrate] ttyname\n",
171		getprogname());
172	exit(1);
173}
174