2 * Chat -- a program for automatic session establishment (i.e. dial
3 * the phone and log in).
5 * This software is in the public domain.
7 * Please send all bug reports, requests for information, etc. to:
9 * Karl Fox <karl@MorningStar.Com>
10 * Morning Star Technologies, Inc.
16 /*static char sccs_id[] = "@(#)chat.c 1.7";*/
17 static char rcsid[] = "$Id: chat.c,v 1.1 1994/05/20 05:32:16 paulus Exp $";
23 #include <sys/types.h>
33 # if defined(SUNOS) && SUNOS >= 41
41 #define SIGHAND_TYPE int (*)()
57 /*************** Micro getopt() *********************************************/
58 #define OPTION(c,v) (_O&2&&**v?*(*v)++:!c||_O&4?0:(!(_O&1)&& \
59 (--c,++v),_O=4,c&&**v=='-'&&v[0][1]?*++*v=='-'\
60 &&!v[0][1]?(--c,++v,0):(_O=2,*(*v)++):0))
61 #define OPTARG(c,v) (_O&2?**v||(++v,--c)?(_O=1,--c,*v++): \
62 (_O=4,(char*)0):(char*)0)
63 #define OPTONLYARG(c,v) (_O&2&&**v?(_O=1,--c,*v++):(char*)0)
64 #define ARG(c,v) (c?(--c,*v++):(char*)0)
66 static int _O = 0; /* Internal state */
67 /*************** Micro getopt() *********************************************/
71 extern char *strcpy(), *strcat(), *malloc();
73 #define copyof(s) ((s) ? strcpy(malloc(strlen(s) + 1), s) : (s))
78 # define LOCK_DIR "/var/spool/lock"
82 # define LOCK_DIR "/usr/spool/locks"
84 # define LOCK_DIR "/usr/spool/uucp"
90 #define DEFAULT_CHAT_TIMEOUT 45
94 char *lock_file = (char *)0;
95 int timeout = DEFAULT_CHAT_TIMEOUT;
97 int have_tty_parameters = 0;
99 struct termio saved_tty_parameters;
102 struct termios saved_tty_parameters;
105 char *abort_string[MAX_ABORTS], *fail_reason = (char *)0,
107 int n_aborts = 0, abort_next = 0, timeout_next = 0;
110 * chat [ -v ] [ -t timeout ] [ -l lock-file ] \
111 * [...[[expect[-say[-expect...]] say expect[-say[-expect]] ...]]]
113 * Perform a UUCP-dialer-like chat script on stdin and stdout.
122 program_name = *argv;
124 while (option = OPTION(argc, argv))
132 if (arg = OPTARG(argc, argv))
133 lock_file = copyof(arg);
140 if (arg = OPTARG(argc, argv))
152 openlog("chat", LOG_PID);
154 openlog("chat", LOG_PID | LOG_NDELAY, LOG_LOCAL2);
157 setlogmask(LOG_UPTO(LOG_INFO));
159 setlogmask(LOG_UPTO(LOG_WARNING));
166 while (arg = ARG(argc, argv))
170 if (arg = ARG(argc, argv))
178 * We got an error parsing the command line.
183 "Usage: %s [ -v ] [ -l lock-file ] [ -t timeout ] chat-script\n",
189 * Print a warning message.
192 warn(format, arg1, arg2, arg3, arg4)
194 int arg1, arg2, arg3, arg4;
196 logf("%s: Warning: ", program_name);
197 logf(format, arg1, arg2, arg3, arg4);
202 * Print an error message and terminate.
205 fatal(format, arg1, arg2, arg3, arg4)
207 int arg1, arg2, arg3, arg4;
209 logf("%s: ", program_name);
210 logf(format, arg1, arg2, arg3, arg4);
217 * Print an error message along with the system error message and
221 sysfatal(format, arg1, arg2, arg3, arg4)
223 int arg1, arg2, arg3, arg4;
225 char message[STR_LEN];
227 sprintf(message, "%s: ", program_name);
228 sprintf(message + strlen(message), format, arg1, arg2, arg3, arg4);
241 alarm(1); alarmed = 1; /* Reset alarm to avoid race window */
242 signal(SIGALRM, sigalrm); /* that can cause hanging in read() */
244 if ((flags = fcntl(0, F_GETFL, 0)) == -1)
245 sysfatal("Can't get file mode flags on stdin");
247 if (fcntl(0, F_SETFL, flags | FNDELAY) == -1)
248 sysfatal("Can't set file mode flags on stdin");
260 if ((flags = fcntl(0, F_GETFL, 0)) == -1)
261 sysfatal("Can't get file mode flags on stdin");
263 if (fcntl(0, F_SETFL, flags & ~FNDELAY) == -1)
264 sysfatal("Can't set file mode flags on stdin");
287 signal(SIGINT, sigint);
288 signal(SIGTERM, sigterm);
289 signal(SIGHUP, sighup);
294 set_tty_parameters();
295 signal(SIGALRM, sigalrm);
296 alarm(0); alarmed = 0;
305 if (ioctl(0, TCGETA, &t) < 0)
306 sysfatal("Can't get terminal parameters");
311 if (tcgetattr(0, &t) < 0)
312 sysfatal("Can't get terminal parameters");
315 saved_tty_parameters = t;
316 have_tty_parameters = 1;
318 t.c_iflag = IGNBRK | ISTRIP | IGNPAR;
321 t.c_cc[VERASE] = t.c_cc[VKILL] = 0;
326 if (ioctl(0, TCSETA, &t) < 0)
327 sysfatal("Can't set terminal parameters");
330 if (tcsetattr(0, TCSANOW, &t) < 0)
331 sysfatal("Can't set terminal parameters");
338 if (have_tty_parameters &&
340 ioctl(0, TCSETA, &saved_tty_parameters) < 0
343 tcsetattr(0, TCSANOW, &saved_tty_parameters) < 0
346 perror("Can't restore terminal parameters");
354 * Create a lock file for the named lock device
358 char hdb_lock_buffer[12];
361 lock_file = strcat(strcat(strcpy(malloc(strlen(LOCK_DIR)
362 + 1 + strlen(lock_file) + 1),
363 LOCK_DIR), "/"), lock_file);
365 if ((fd = open(lock_file, O_EXCL | O_CREAT | O_RDWR, 0644)) < 0)
369 lock_file = (char *)0; /* Don't remove someone else's lock file! */
370 sysfatal("Can't get lock file '%s'", s);
374 sprintf(hdb_lock_buffer, "%10d\n", getpid());
375 write(fd, hdb_lock_buffer, 11);
378 write(fd, &pid, sizeof pid);
385 * Remove our lockfile
392 lock_file = (char *)0;
397 * 'Clean up' this string.
399 char *clean(s, sending)
405 int add_return = sending;
407 for (s1 = temp; *s; ++s)
414 case 'd': if (sending)
420 case 'q': quiet = ! quiet; break;
421 case 'r': *s1++ = '\r'; break;
422 case 'n': *s1++ = '\n'; break;
423 case 's': *s1++ = ' '; break;
425 case 'c': if (sending && s[1] == '\0')
438 *s1++ = (int)(*++s) & 0x1F;
449 return (copyof(temp));
458 if (strcmp(s, "ABORT") == 0)
464 if (strcmp(s, "TIMEOUT") == 0)
472 register char *hyphen;
474 for (hyphen = s; *hyphen; ++hyphen)
476 if (hyphen == s || hyphen[-1] != '\\')
489 for (hyphen = s; *hyphen; ++hyphen)
491 if (hyphen == s || hyphen[-1] != '\\')
514 logf("Failed(%s)\n", fail_reason);
527 static char string[10];
530 meta = (c & 0x80) ? "M-" : "";
534 sprintf(string, "%s^%c", meta, (int)c + '@');
537 sprintf(string, "%s^?", meta);
539 sprintf(string, "%s%c", meta, c);
556 if (n_aborts >= MAX_ABORTS)
557 fatal("Too many ABORT strings");
561 if (strlen(s1) > strlen(s))
562 fatal("Illegal ABORT string ('%s')\n", s);
564 if (strlen(s1) > sizeof fail_buffer - 1)
565 fatal("Too long ABORT string ('%s')\n", s);
568 abort_string[n_aborts++] = s;
572 register char *s1 = s;
576 for (s1 = s; *s1; ++s1)
577 logf("%s", character(*s1));
589 timeout = DEFAULT_CHAT_TIMEOUT;
593 logf("timeout set to %d seconds\n", timeout);
597 if ( ! put_string(s))
610 status = read(0, &c, 1);
615 return ((int)c & 0x7F);
618 warn("read() on stdin returned %d", status);
621 if ((status = fcntl(0, F_GETFL, 0)) == -1)
622 sysfatal("Can't get file mode flags on stdin");
624 if (fcntl(0, F_SETFL, status & ~FNDELAY) == -1)
625 sysfatal("Can't set file mode flags on stdin");
638 status = write(1, &c, 1);
646 warn("write() on stdout returned %d", status);
649 if ((status = fcntl(0, F_GETFL, 0)) == -1)
650 sysfatal("Can't get file mode flags on stdin");
652 if (fcntl(0, F_SETFL, status & ~FNDELAY) == -1)
653 sysfatal("Can't set file mode flags on stdin");
672 register char *s1 = s;
674 for (s1 = s; *s1; ++s1)
675 logf("%s", character(*s1));
681 alarm(timeout); alarmed = 0;
685 register char c = *s;
688 if ((c = *++s) == '\0')
691 if (c == 'd') /* \d -- Delay */
697 if (alarmed || put_char(*s) < 0)
701 alarm(0); alarmed = 0;
705 if (errno == EINTR || errno == EWOULDBLOCK)
706 logf(" -- write timed out\n");
708 syslog(LOG_INFO, " -- write failed: %m");
715 alarm(0); alarmed = 0;
720 * 'Wait for' this string to appear on this file descriptor.
722 int get_string(string)
723 register char *string;
726 int c, printed = 0, len, minlen;
727 register char *s = temp, *end = s + STR_LEN;
729 fail_reason = (char *)0;
730 string = clean(string, 0);
731 len = strlen(string);
732 minlen = (len > sizeof(fail_buffer)? len: sizeof(fail_buffer)) - 1;
740 for (s1 = string; *s1; ++s1)
741 logf("%s", character(*s1));
748 logf("expect string is too long\n");
762 alarm(timeout); alarmed = 0;
764 while ( ! alarmed && (c = get_char()) >= 0)
773 logf("%s", character(c));
778 if (s - temp >= len &&
779 c == string[len - 1] &&
780 strncmp(s - len, string, len) == 0)
787 alarm(0); alarmed = 0;
791 for (n = 0; n < n_aborts; ++n)
792 if (s - temp >= (abort_len = strlen(abort_string[n])) &&
793 strncmp(s - abort_len, abort_string[n], abort_len) == 0)
797 logf(" -- failed\n");
800 alarm(0); alarmed = 0;
801 strcpy(fail_reason = fail_buffer, abort_string[n]);
807 strncpy(temp, s - minlen, minlen);
811 if (alarmed && verbose)
812 warn("Alarm synchronization problem");
817 if (verbose && printed)
822 logf(" -- read timed out\n");
824 syslog(LOG_INFO, " -- read failed: %m");
832 * Delay an amount appropriate for between typed characters.
839 for (i = 0; i < 30000; ++i) /* ... did we just say appropriate? */
841 # else /* NO_USLEEP */
843 # endif /* NO_USLEEP */
857 vsprintf(buf, fmt, pvar);
860 p = line + strlen(line);
863 if (buf[strlen(buf)-1] == '\n') {
864 syslog(LOG_INFO, "%s", line);
869 #include <sys/types.h>
870 #include <sys/time.h>
873 usleep -- support routine for 4.2BSD system call emulations
874 last edit: 29-Oct-1984 D A Gwyn
880 usleep( usec ) /* returns 0 if ok, else -1 */
881 long usec; /* delay in microseconds */
883 static struct /* `timeval' */
885 long tv_sec; /* seconds */
886 long tv_usec; /* microsecs */
887 } delay; /* _select() timeout */
889 delay.tv_sec = usec / 1000000L;
890 delay.tv_usec = usec % 1000000L;
892 return select( 0, (long *)0, (long *)0, (long *)0, &delay );