1 /* $NetBSD: slattach.c,v 1.33 2013/10/20 20:17:52 mbalmer 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 43 static char sccsid[] = "@(#)slattach.c 8.2 (Berkeley) 1/7/94"; 44 #else 45 __RCSID("$NetBSD: slattach.c,v 1.33 2013/10/20 20:17:52 mbalmer 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 69 static int speed = 9600; 70 static const char *ldisc = "slip"; 71 72 static char devicename[32]; 73 74 __dead static void usage(void); 75 76 int 77 main(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 't': 108 ldisc = 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 && errno != ENOTTY) 139 err(1, "TIOCSDTR"); 140 if (ioctl(fd, TIOCSLINED, ldisc) < 0) 141 err(1, "TIOCSLINED"); 142 if (opt_detach && daemon(0, 0) != 0) 143 err(1, "couldn't detach"); 144 sigemptyset(&nsigset); 145 for (;;) 146 sigsuspend(&nsigset); 147 } 148 149 static void 150 usage(void) 151 { 152 153 (void)fprintf(stderr, 154 "usage: %s [-t ldisc] [-hHlmn] [-s baudrate] ttyname\n", 155 getprogname()); 156 exit(1); 157 } 158