sbin/slattach/slattach.c

   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\
  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 1.29 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
  68 int     speed = 9600;
  69 int     slipdisc = SLIPDISC;
  70
  71 char    devicename[32];
  72
  73 int     ttydisc(char *);
  74 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 '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
 149 int
 150 ttydisc(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
 164 void
 165 usage(void)
 166 {
 167
 168         (void)fprintf(stderr,
 169             "usage: %s [-t ldisc] [-hHlmn] [-s baudrate] ttyname\n",
 170                 getprogname());
 171         exit(1);
 172 }