From tomj@fido.wps.com Thu Feb 17 21:54:39 1994 Received: from fido.wps.com by fnord.tlg.org (8.3/wps.com-hackery) id VAA00259; Thu, 17 Feb 1994 21:54:32 -0800 Received: by fido.wps.com (5.67/wps.com-hackery) id AA18424; Thu, 17 Feb 94 21:54:47 -0800 Received: from [140.174.115.1] by fido.wps.com (5.67/wps.com-hackery) id AA14730; Wed, 16 Feb 94 21:11:59 -0800 Received: from localhost by steel.twilight.com (8.6.5/TCP/hacked/2.0) id VAA00180; Wed, 16 Feb 1994 21:12:24 -0800 Date: Wed, 16 Feb 1994 21:12:24 -0800 From: tom@twilight.com (Tom Markson) Message-Id: <199402170512.VAA00180@steel.twilight.com> To: tomj@wps.com Subject: That Slip program Sender: tomj@fido.wps.com Status: OR # This is a shell archive. Remove anything before this line, # then unpack it by saving it in a file and typing "sh file". # # This archive contains: # Makefile startslip.1 startslip.c # echo x - Makefile cat >Makefile <<'@EOF' # @(#)Makefile 5.1 (Berkeley) 3/17/92 PROG= startslip MAN8= startslip.0 .include @EOF chmod 644 Makefile echo x - startslip.1 cat >startslip.1 <<'@EOF' .\" Copyright (c) 1990, 1991 The Regents of the University of California. .\" All rights reserved. .\" .\" 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. .\" .\" @(#)startslip.1 5.3 (Berkeley) 5/9/91 .\" .Dd May 9, 1991 .Dt STARTSLIP 1 .Os .Sh NAME .Nm startslip .Nd dial up and login to a slip server .Sh SYNOPSIS .Nm startslip .Op Fl d .Op Fl s Ar string .Ar device user passwd .Sh DESCRIPTION .Nm Startslip opens the specified .Ar device . .Pp Once carrier is asserted .Nm startslip attempts to login as the specified .Ar user with the given .Ar password . If successful, it puts the device into the slip line discipline. If carrier drops and a .Dv SIGHUP is sent to .Nm startslip , it closes the device and attempts to repeat the dialup and login sequence. .Pp Available options: .Bl -tag -width Ar .It Fl d .Nm Startslip prints out debugging information about what it is trying to do. .It Fl s Ar string The optional .Ar string is written to .Ar device . For a dialup modem, the string is used to specify a dial sequence. .El .Sh SEE ALSO .Xr sliplogin 8 .Sh HISTORY The .Nm startslip command is .Ud . @EOF chmod 644 startslip.1 echo x - startslip.c cat >startslip.c <<'@EOF' /*- * Copyright (c) 1990 The Regents of the University of California. * All rights reserved. * * 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 char copyright[] = "@(#) Copyright (c) 1990, 1991 The Regents of the University of California.\n\ All rights reserved.\n"; #endif /* not lint */ #ifndef lint static char sccsid[] = "@(#)startslip.c 5.6 (Berkeley) 3/16/92"; #endif /* not lint */ #include #if BSD >= 199006 #define POSIX #endif #ifdef POSIX #include #include #else #include #endif #include #include #include #include #include #include #include #include #include #include #define DEFAULT_BAUD B9600 int speed = DEFAULT_BAUD; int hup; int logged_in; int wait_time = 60; /* then back off */ #define MAXTRIES 6 /* w/60 sec and doubling, takes an hour */ #define PIDFILE "/var/run/startslip.pid" #ifdef DEBUG int debug = 1; #undef LOG_ERR #undef LOG_INFO #define syslog fprintf #define LOG_ERR stderr #define LOG_INFO stderr #else int debug = 0; #endif #define printd if (debug) printf main(argc, argv) int argc; char **argv; { extern char *optarg; extern int optind; int ch, disc; int fd = -1; void sighup(); FILE *wfd = NULL, *pfd; char *dialerstring = 0, buf[BUFSIZ], cmdbuf[BUFSIZ]; int n; int first = 1, tries = 0; int pausefirst = 0; int pid; int unit; #ifdef POSIX struct termios t; #else struct sgttyb sgtty; #endif while ((ch = getopt(argc, argv, "db:s:p:")) != EOF) switch (ch) { case 'd': debug = 1; break; #ifdef POSIX case 'b': speed = atoi(optarg); break; #endif case 'p': pausefirst = atoi(optarg); break; case 's': dialerstring = optarg; break; case '?': default: usage(); } argc -= optind; argv += optind; if (argc != 3) usage(); openlog("startslip", LOG_PID, LOG_DAEMON); #if BSD <= 43 if (debug == 0 && (fd = open("/dev/tty", 0)) >= 0) { ioctl(fd, TIOCNOTTY, 0); close(fd); fd = -1; } #endif if (debug) setbuf(stdout, NULL); if (pfd = fopen(PIDFILE, "r")) { pid = 0; fscanf(pfd, "%d", &pid); if (pid > 0) kill(pid, SIGUSR1); fclose(pfd); } restart: logged_in = 0; if (++tries > MAXTRIES) { syslog(LOG_ERR, "exiting after %d tries\n", tries); /* ??? if (first) */ exit(1); } /* * We may get a HUP below, when the parent (session leader/ * controlling process) exits; ignore HUP until into new session. */ signal(SIGHUP, SIG_IGN); hup = 0; if (fork() > 0) { if (pausefirst) sleep(pausefirst); if (first) printd("parent exit\n"); exit(0); } pausefirst = 0; #ifdef POSIX if (setsid() == -1) perror("setsid"); #endif pid = getpid(); printd("restart: pid %d: ", pid); if (pfd = fopen(PIDFILE, "w")) { fprintf(pfd, "%d\n", pid); fclose(pfd); } if (wfd) { printd("fclose, "); fclose(wfd); wfd == NULL; } if (fd >= 0) { printd("close, "); close(fd); sleep(5); } printd("open"); if ((fd = open(argv[0], O_RDWR)) < 0) { perror(argv[0]); syslog(LOG_ERR, "open %s: %m\n", argv[0]); if (first) exit(1); else { sleep(wait_time * tries); goto restart; } } printd(" %d", fd); #ifdef TIOCSCTTY if (ioctl(fd, TIOCSCTTY, 0) < 0) perror("ioctl (TIOCSCTTY)"); #endif signal(SIGHUP, sighup); if (debug) { if (ioctl(fd, TIOCGETD, &disc) < 0) perror("ioctl(TIOCGETD)"); printf(" (disc was %d)", disc); } disc = TTYDISC; if (ioctl(fd, TIOCSETD, &disc) < 0) { perror("ioctl(TIOCSETD)"); syslog(LOG_ERR, "%s: ioctl (TIOCSETD 0): %m\n", argv[0]); } printd(", ioctl"); #ifdef POSIX if (tcgetattr(fd, &t) < 0) { perror("tcgetattr"); syslog(LOG_ERR, "%s: tcgetattr: %m\n", argv[0]); exit(2); } cfmakeraw(&t); t.c_iflag &= ~IMAXBEL; t.c_cflag |= CRTSCTS; cfsetspeed(&t, speed); if (tcsetattr(fd, TCSAFLUSH, &t) < 0) { perror("tcsetattr"); syslog(LOG_ERR, "%s: tcsetattr: %m\n", argv[0]); if (first) exit(2); else { sleep(wait_time * tries); goto restart; } } #else if (ioctl(fd, TIOCGETP, &sgtty) < 0) { perror("ioctl (TIOCGETP)"); syslog(LOG_ERR, "%s: ioctl (TIOCGETP): %m\n", argv[0]); exit(2); } sgtty.sg_flags = RAW | ANYP; sgtty.sg_erase = sgtty.sg_kill = 0377; sgtty.sg_ispeed = sgtty.sg_ospeed = speed; if (ioctl(fd, TIOCSETP, &sgtty) < 0) { perror("ioctl (TIOCSETP)"); syslog(LOG_ERR, "%s: ioctl (TIOCSETP): %m\n", argv[0]); if (first) exit(2); else { sleep(wait_time * tries); goto restart; } } #endif sleep(2); /* wait for flakey line to settle */ if (hup) goto restart; wfd = fdopen(fd, "w+"); if (wfd == NULL) { syslog(LOG_ERR, "can't fdopen slip line\n"); exit(10); } setbuf(wfd, (char *)0); if (dialerstring) { printd(", send dialstring"); fprintf(wfd, "%s\r", dialerstring); } else putc('\r', wfd); printd("\n"); /* * Log in */ printd("look for login: "); for (;;) { if ((n = getline(buf, BUFSIZ, fd)) == 0 || hup) { sleep(wait_time * tries); goto restart; } if (n >= 6 && bcmp(&buf[n - 5], "ogin:", 5) == 0) { fprintf(wfd, "%s\r", argv[1]); printd("Sent login: %s\n", argv[1]); continue; } if (n >= 9 && bcmp(&buf[n - 8], "assword:", 8) == 0) { fprintf(wfd, "%s\r", argv[2]); printd("Sent password: %s\n", argv[2]); break; } } /* * Attach */ printd("setd"); disc = SLIPDISC; if (ioctl(fd, TIOCSETD, &disc) < 0) { perror("ioctl(TIOCSETD)"); syslog(LOG_ERR, "%s: ioctl (TIOCSETD SLIP): %m\n", argv[0]); exit(1); } /* find out what unit number we were assigned */ if (ioctl(fd, SLIOCGUNIT, (caddr_t)&unit) < 0) { syslog(LOG_ERR, "%s: ioctl (SLIOCGUNIT): %m", argv[0]); exit(1); } if (first && debug == 0) { close(0); close(1); close(2); (void) open("/dev/null", O_RDWR); (void) dup2(0, 1); (void) dup2(0, 2); } (void) sprintf(cmdbuf, "ifconfig sl%d up", unit); (void) system(cmdbuf); printd(", ready\n"); if (!first) syslog(LOG_INFO, "reconnected (%d tries).\n", tries); first = 0; tries = 0; logged_in = 1; while (hup == 0) { sigpause(0L); printd("sigpause return\n"); } goto restart; } void sighup() { printd("hup\n"); if (hup == 0 && logged_in) syslog(LOG_INFO, "hangup signal\n"); hup = 1; } getline(buf, size, fd) char *buf; int size, fd; { register int i; int ret; size--; for (i = 0; i < size; i++) { if (hup) return (0); if ((ret = read(fd, &buf[i], 1)) == 1) { buf[i] &= 0177; if (buf[i] == '\r' || buf[i] == '\0') buf[i] = '\n'; if (buf[i] != '\n' && buf[i] != ':') continue; buf[i + 1] = '\0'; printd("Got %d: \"%s\"\n", i + 1, buf); return (i+1); } if (ret <= 0) { if (ret < 0) perror("getline: read"); else fprintf(stderr, "read returned 0\n"); buf[i] = '\0'; printd("returning 0 after %d: \"%s\"\n", i, buf); return (0); } } return (0); } usage() { fprintf(stderr, "usage: startslip [-d] [-s string] dev user passwd\n"); exit(1); } @EOF chmod 444 startslip.c exit 0