/* $OpenBSD: slattach.c,v 1.14 2002/07/03 22:32:33 deraadt Exp $ */ /* $NetBSD: slattach.c,v 1.17 1996/05/19 21:57:39 jonathan Exp $ */ /* * Copyright (c) 1988, 1993 * The Regents of the University of California. All rights reserved. * * This code is derived from software contributed to Berkeley by * Rick Adams. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 4. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #ifndef lint static char copyright[] = "@(#) Copyright (c) 1988, 1993\n\ The Regents of the University of California. All rights reserved.\n"; #endif /* not lint */ #ifndef lint #if 0 static char sccsid[] = "@(#)slattach.c 8.2 (Berkeley) 1/7/94"; #else static char rcsid[] = "$OpenBSD: slattach.c,v 1.14 2002/07/03 22:32:33 deraadt Exp $"; #endif #endif /* not lint */ #include <sys/param.h> #include <sys/socket.h> #include <sys/types.h> #include <sys/ioctl.h> #include <net/if.h> #include <netinet/in.h> #include <err.h> #include <errno.h> #include <fcntl.h> #include <netdb.h> #include <paths.h> #include <signal.h> #include <stdio.h> #include <stdlib.h> #include <string.h> #include <syslog.h> #include <termios.h> #include <unistd.h> int speed = 9600; int slipdisc = SLIPDISC; char devicename[32]; static char pidfilename[MAXPATHLEN]; /* name of pid file */ static pid_t pid; /* Our pid */ static FILE *pidfile; void usage(void); int ttydisc(char *); void handler(int); volatile sig_atomic_t dying; int main(int argc, char *argv[]) { int fd; char *dev; struct termios tty; tcflag_t cflag = HUPCL; int ch; sigset_t sigset; int i; while ((ch = getopt(argc, argv, "hms:r:t:")) != -1) { switch (ch) { case 'h': cflag |= CRTSCTS; break; case 'm': cflag &= ~HUPCL; break; case 's': speed = atoi(optarg); break; case 'r': case 't': slipdisc = ttydisc(optarg); break; case '?': default: usage(); } } argc -= optind; argv += optind; if (argc != 1) usage(); dev = *argv; if (strncmp(_PATH_DEV, dev, sizeof(_PATH_DEV) - 1)) { (void)snprintf(devicename, sizeof(devicename), "%s%s", _PATH_DEV, dev); dev = devicename; } if ((fd = open(dev, O_RDWR | O_NDELAY)) < 0) err(1, "open: %s", dev); tty.c_cflag = CREAD | CS8 | cflag; tty.c_iflag = 0; tty.c_lflag = 0; tty.c_oflag = 0; tty.c_cc[VMIN] = 1; tty.c_cc[VTIME] = 0; cfsetspeed(&tty, speed); if (tcsetattr(fd, TCSADRAIN, &tty) < 0) err(1, "tcsetattr"); if (ioctl(fd, TIOCSDTR, 0) < 0) err(1, "TIOCSDTR"); if (ioctl(fd, TIOCSETD, &slipdisc) < 0) err(1, "TIOCSETD"); if (fork() > 0) return (0); /* set up a signal handler to delete the PID file. */ signal(SIGHUP, handler); signal(SIGTERM, handler); /* write PID to a file */ pid = getpid(); for(i = strlen(dev); (dev[i] != '/') && i > 0; i--) ; if(dev[i] == '/') i++; (void) snprintf(pidfilename, sizeof pidfilename, "%sslip.%s.pid", _PATH_VARRUN, dev + i); truncate(pidfilename, 0); /* If this fails, so will the next one... */ if ((pidfile = fopen(pidfilename, "w")) != NULL) { fprintf(pidfile, "%ld\n", (long)pid); (void) fclose(pidfile); } else { syslog(LOG_ERR, "Failed to create pid file %s: %m", pidfilename); pidfilename[0] = 0; } sigemptyset(&sigset); for (;;) { sigsuspend(&sigset); if (dying) { /* delete the pid file. */ if (pidfilename[0] != 0) { if (unlink(pidfilename) < 0 && errno != ENOENT) syslog(LOG_WARNING, "unable to delete pid file: %m"); } /* terminate gracefully */ return (0); } } } void handler(int useless) { dying = 1; } int ttydisc(char *name) { if (strcmp(name, "slip") == 0) return(SLIPDISC); #ifdef STRIPDISC else if (strcmp(name, "strip") == 0) return(STRIPDISC); #endif else usage(); } void usage(void) { fprintf(stderr, "usage: slattach [-t ldisc] [-hm] [-s baudrate] ttyname\n"); exit(1); }