2 * Copyright (c) 1990, 1991, 1993
3 * The Regents of the University of California. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * @(#) Copyright (c) 1990, 1991, 1993 The Regents of the University of California. All rights reserved.
34 * @(#)startslip.c 8.1 (Berkeley) 6/5/93
35 * $FreeBSD: src/sbin/startslip/startslip.c,v 1.31.2.1 2000/05/07 18:26:51 joe Exp $
36 * $DragonFly: src/sbin/startslip/startslip.c,v 1.7 2005/02/02 20:27:51 cpressey Exp $
39 #include <sys/types.h>
57 #define DEFAULT_BAUD B9600
58 int speed = DEFAULT_BAUD;
59 #define FC_NONE 0 /* flow control: none */
60 #define FC_HW 1 /* flow control: hardware (RTS/CTS) */
61 int flowcontrol = FC_NONE;
62 int modem_control = 1; /* !CLOCAL+HUPCL iff we watch carrier. */
64 int uucp_lock = 0; /* uucp locking */
69 int locked = 0; /* uucp lock active */
71 int wait_time = 60; /* then back off */
72 int script_timeout = 90; /* connect script default timeout */
73 time_t conn_time, start_time;
74 int MAXTRIES = 6; /* w/60 sec and doubling, takes an hour */
75 #define PIDFILE "%sstartslip.%s.pid"
78 char *dials[MAXDIALS];
83 char *dvname, *devicename;
90 #define syslog fprintf
91 #define LOG_ERR stderr
92 #define LOG_INFO stderr
96 #define printd if (debug) printf
98 static int carrier(void);
99 static void down(int);
100 static int getline(char *, int, int, time_t);
101 static void usage(void);
102 static void sighup(int);
103 static void sigterm(int);
104 static void sigurg(int);
107 main(int argc, char **argv)
112 char *dialerstring = 0, buf[BUFSIZ];
113 int unitnum, keepal = 0, outfill = 0;
116 char *upscript = NULL, *downscript = NULL;
117 int first = 1, tries = 0;
124 while ((ch = getopt(argc, argv, "dhlb:s:t:w:A:U:D:W:K:O:S:L")) != -1)
130 speed = atoi(optarg);
133 if (diali >= MAXDIALS)
134 errx(1, "max dial strings number (%d) exceeded", MAXDIALS);
135 dials[diali++] = strdup(optarg);
138 script_timeout = atoi(optarg);
141 wait_time = atoi(optarg);
144 MAXTRIES = atoi(optarg);
147 annex = strdup(optarg);
150 upscript = strdup(optarg);
153 downscript = strdup(optarg);
165 keepal = atoi(optarg);
168 outfill = atoi(optarg);
171 sl_unit = atoi(optarg);
184 * Copy these so they exist after we clobber them.
186 devicename = strdup(argv[0]);
187 username = strdup(argv[1]);
188 password = strdup(argv[2]);
191 * Security hack. Do not want private information such as the
192 * password and possible phone number to be left around.
193 * So we clobber the arguments.
195 for (ap = argv - optind + 1; ap < argv + 3; ap++)
196 for (cp = *ap; *cp != 0; cp++)
199 openlog("startslip", LOG_PID|LOG_PERROR, LOG_DAEMON);
202 setbuf(stdout, NULL);
204 signal(SIGTERM, sigterm);
205 if ((dvname = strrchr(devicename, '/')) == NULL)
210 result = snprintf(my_pidfile, sizeof(my_pidfile),
211 PIDFILE, _PATH_VARRUN, dvname);
212 if (result < 0 || (unsigned int)result >= sizeof(my_pidfile))
215 if ((pfd = fopen(my_pidfile, "r")) != NULL) {
216 if (fscanf(pfd, "%ld\n", &lpid) == 1) {
218 if (pid == lpid && pid > 0)
222 pfd = NULL; /* not remove pidfile yet */
223 sleep(5); /* allow down script to be completed */
226 signal(SIGHUP, SIG_IGN);
227 signal(SIGURG, SIG_IGN);
232 conn_time = time(NULL) - start_time;
239 } else if (fd >= 0) {
242 conn_time = time(NULL) - start_time;
250 syslog(LOG_INFO, "%s: connection time elapsed: %ld secs",
251 username, (long)conn_time);
252 sprintf(buf, "LINE=%d %s %s down",
253 diali ? (dialc - 1) % diali : 0,
254 downscript ? downscript : "/sbin/ifconfig" , unitname);
261 if (MAXTRIES > 0 && tries > MAXTRIES) {
262 syslog(LOG_ERR, "%s: exiting login after %d tries", username, tries);
269 syslog(LOG_INFO, "%s: sleeping %d seconds (%d tries)",
270 username, wait_time * (tries - 1), tries);
271 sleep(wait_time * (tries - 1));
276 if (daemon(1, debug) < 0) {
277 syslog(LOG_ERR, "%s: daemon: %m", username);
282 printd("restart: pid %ld: ", (long)pid);
283 if ((pfd = fopen(my_pidfile, "w")) != NULL) {
284 fprintf(pfd, "%ld\n", (long)pid);
290 if ((res = uu_lock(dvname)) != UU_LOCK_OK) {
291 if (res != UU_LOCK_INUSE)
292 syslog(LOG_ERR, "uu_lock: %s", uu_lockerr(res));
293 syslog(LOG_ERR, "%s: can't lock %s", username, devicename);
298 if ((fd = open(devicename, O_RDWR | O_NONBLOCK)) < 0) {
299 syslog(LOG_ERR, "%s: open %s: %m", username, devicename);
310 signal(SIGHUP, sighup);
311 if (ioctl(fd, TIOCSCTTY, 0) < 0) {
312 syslog(LOG_ERR, "%s: ioctl (TIOCSCTTY): %m", username);
315 if (tcsetpgrp(fd, getpid()) < 0) {
316 syslog(LOG_ERR, "%s: tcsetpgrp failed: %m", username);
320 if (tcgetattr(fd, &t) < 0) {
321 syslog(LOG_ERR, "%s: tcgetattr(%s): %m", username, devicename);
325 switch (flowcontrol) {
327 t.c_cflag |= (CRTS_IFLOW|CCTS_OFLOW);
330 t.c_cflag &= ~(CRTS_IFLOW|CCTS_OFLOW);
336 t.c_cflag &= ~(HUPCL);
337 t.c_cflag |= CLOCAL; /* until modem commands passes */
338 cfsetispeed(&t, speed);
339 cfsetospeed(&t, speed);
340 if (tcsetattr(fd, TCSAFLUSH, &t) < 0) {
341 syslog(LOG_ERR, "%s: tcsetattr(%s): %m", username, devicename);
344 sleep(2); /* wait for flakey line to settle */
345 if (hup || terminate)
348 wfd = fdopen(fd, "w+");
350 syslog(LOG_ERR, "%s: can't fdopen %s: %m", username, devicename);
356 dialerstring = dials[dialc++ % diali];
358 syslog(LOG_INFO, "%s: dialer string: %s\\r", username, dialerstring);
359 fprintf(wfd, "%s\r", dialerstring);
363 fintimeout = time(NULL) + script_timeout;
365 printd("waiting for carrier\n");
366 while (time(NULL) < fintimeout && !carrier()) {
368 if (hup || terminate)
373 t.c_cflag &= ~(CLOCAL);
374 if (tcsetattr(fd, TCSANOW, &t) < 0) {
375 syslog(LOG_ERR, "%s: tcsetattr(%s): %m", username, devicename);
378 /* Only now we able to receive HUP on carrier drop! */
384 printd("look for login: ");
386 if (getline(buf, BUFSIZ, fd, fintimeout) == 0 || hup || terminate)
389 if (bcmp(buf, annex, strlen(annex)) == 0) {
390 fprintf(wfd, "slip\r");
391 printd("Sent \"slip\"\n");
394 if (bcmp(&buf[1], "sername:", 8) == 0) {
395 fprintf(wfd, "%s\r", username);
396 printd("Sent login: %s\n", username);
399 if (bcmp(&buf[1], "assword:", 8) == 0) {
400 fprintf(wfd, "%s\r", password);
401 printd("Sent password: %s\n", password);
405 if (strstr(&buf[1], "ogin:") != NULL) {
406 fprintf(wfd, "%s\r", username);
407 printd("Sent login: %s\n", username);
410 if (strstr(&buf[1], "assword:") != NULL) {
411 fprintf(wfd, "%s\r", password);
412 printd("Sent password: %s\n", password);
418 sleep(5); /* Wait until login completed */
419 if (hup || terminate)
421 start_time = time(NULL);
427 if (ioctl(fd, TIOCSETD, &disc) < 0) {
428 syslog(LOG_ERR, "%s: ioctl (%s, TIOCSETD): %m",
429 username, devicename);
432 if (sl_unit >= 0 && ioctl(fd, SLIOCSUNIT, &sl_unit) < 0) {
433 syslog(LOG_ERR, "%s: ioctl(SLIOCSUNIT): %m", username);
436 if (ioctl(fd, SLIOCGUNIT, &unitnum) < 0) {
437 syslog(LOG_ERR, "%s: ioctl(SLIOCGUNIT): %m", username);
440 sprintf(unitname, "sl%d", unitnum);
443 signal(SIGURG, sigurg);
444 if (ioctl(fd, SLIOCSKEEPAL, &keepal) < 0) {
445 syslog(LOG_ERR, "%s: ioctl(SLIOCSKEEPAL): %m", username);
449 if (outfill > 0 && ioctl(fd, SLIOCSOUTFILL, &outfill) < 0) {
450 syslog(LOG_ERR, "%s: ioctl(SLIOCSOUTFILL): %m", username);
454 sprintf(buf, "LINE=%d %s %s up",
455 diali ? (dialc - 1) % diali : 0,
456 upscript ? upscript : "/sbin/ifconfig" , unitname);
461 syslog(LOG_INFO, "%s: reconnected on %s (%d tries)", username, unitname, tries);
463 syslog(LOG_INFO, "%s: connected on %s", username, unitname);
467 while (hup == 0 && terminate == 0) {
469 printd("sigpause return\n");
472 return(0); /* not reached */
476 sighup(int signo __unused)
479 if (hup == 0 && logged_in)
480 syslog(LOG_INFO, "%s: got hangup signal", username);
485 sigurg(int signo __unused)
488 if (hup == 0 && logged_in)
489 syslog(LOG_INFO, "%s: got dead line signal", username);
494 sigterm(int signo __unused)
496 printd("terminate\n");
497 if (terminate == 0 && logged_in)
498 syslog(LOG_INFO, "%s: got terminate signal", username);
503 getline(char *buf, int size, int this_fd, time_t fintimeout)
512 for (i = 0; i < size; i++) {
513 if (hup || terminate)
515 if ((timeout = fintimeout - time(NULL)) <= 0)
518 FD_SET(fd, &readfds);
521 if ((ret = select(this_fd + 1, &readfds, NULL, NULL, &tv)) < 0) {
523 syslog(LOG_ERR, "%s: getline: select: %m", username);
527 printd("getline: timed out\n");
530 if ((ret = read(this_fd, &buf[i], 1)) == 1) {
532 if (buf[i] == '\r' || buf[i] == '\0') {
536 if (buf[i] != '\n' && buf[i] != ':')
539 printd("Got %d: %s", i + 1, buf);
544 syslog(LOG_ERR, "%s: getline: read: %m", username);
546 syslog(LOG_ERR, "%s: read returned 0", username);
548 printd("returning %d after %d: %s\n", ret, i, buf);
561 if (ioctl(fd, TIOCMGET, &comstate) < 0) {
562 syslog(LOG_ERR, "%s: ioctl (%s, TIOCMGET): %m",
563 username, devicename);
566 return !!(comstate & TIOCM_CD);
576 if (uucp_lock && locked)
584 fprintf(stderr, "%s\n%s\n%s\n%s\n",
585 "usage: startslip [-d] [-b speed] [-s string1 [-s string2 [...]]] [-h] [-l]",
586 " [-L] [-A annexname] [-U upscript] [-D downscript]",
587 " [-t script_timeout] [-W maxtries] [-w retry_pause]",
588 " [-K keepalive] [-O outfill] [-S unit] device user passwd");