1 /*
2 * Chat -- a program for automatic session establishment (i.e. dial
3 * the phone and log in).
4 *
5 * Standard termination codes:
6 * 0 - successful completion of the script
7 * 1 - invalid argument, expect string too large, etc.
8 * 2 - error on an I/O operation or fatal error condition.
9 * 3 - timeout waiting for a simple string.
10 * 4 - the first string declared as "ABORT"
11 * 5 - the second string declared as "ABORT"
12 * 6 - ... and so on for successive ABORT strings.
13 *
14 * This software is in the public domain.
15 *
16 * -----------------
17 * added -T and -U option and \T and \U substitution to pass a phone
18 * number into chat script. Two are needed for some ISDN TA applications.
19 * Keith Dart <kdart@cisco.com>
20 *
21 *
22 * Added SAY keyword to send output to stderr.
23 * This allows to turn ECHO OFF and to output specific, user selected,
24 * text to give progress messages. This best works when stderr
25 * exists (i.e.: pppd in nodetach mode).
26 *
27 * Added HANGUP directives to allow for us to be called
28 * back. When HANGUP is set to NO, chat will not hangup at HUP signal.
29 * We rely on timeouts in that case.
30 *
31 * Added CLR_ABORT to clear previously set ABORT string. This has been
32 * dictated by the HANGUP above as "NO CARRIER" (for example) must be
33 * an ABORT condition until we know the other host is going to close
34 * the connection for call back. As soon as we have completed the
35 * first stage of the call back sequence, "NO CARRIER" is a valid, non
36 * fatal string. As soon as we got called back (probably get "CONNECT"),
37 * we should re-arm the ABORT "NO CARRIER". Hence the CLR_ABORT command.
38 * Note that CLR_ABORT packs the abort_strings[] array so that we do not
39 * have unused entries not being reclaimed.
40 *
41 * In the same vein as above, added CLR_REPORT keyword.
42 *
43 * Allow for comments. Line starting with '#' are comments and are
44 * ignored. If a '#' is to be expected as the first character, the
45 * expect string must be quoted.
46 *
47 *
48 * Francis Demierre <Francis@SwissMail.Com>
49 * Thu May 15 17:15:40 MET DST 1997
50 *
51 *
52 * Added -r "report file" switch & REPORT keyword.
53 * Robert Geer <bgeer@xmission.com>
54 *
55 * Added -s "use stderr" and -S "don't use syslog" switches.
56 * June 18, 1997
57 * Karl O. Pinc <kop@meme.com>
58 *
59 *
60 * Added -e "echo" switch & ECHO keyword
61 * Dick Streefland <dicks@tasking.nl>
62 *
63 *
64 * Considerable updates and modifications by
65 * Al Longyear <longyear@pobox.com>
66 * Paul Mackerras <paulus@cs.anu.edu.au>
67 *
68 *
69 * The original author is:
70 *
71 * Karl Fox <karl@MorningStar.Com>
72 * Morning Star Technologies, Inc.
73 * 1760 Zollinger Road
74 * Columbus, OH 43221
75 * (614)451-1883
76 *
77 *
78 */
79
80 #include <sys/types.h>
81 #include <sys/stat.h>
82 #include <ctype.h>
83 #include <errno.h>
84 #include <fcntl.h>
85 #include <signal.h>
86 #include <stdarg.h>
87 #include <stdio.h>
88 #include <stdlib.h>
89 #include <string.h>
90 #include <syslog.h>
91 #include <termios.h>
92 #include <time.h>
93 #include <unistd.h>
94
95 #define STR_LEN 1024
96
97 #ifndef SIGTYPE
98 #define SIGTYPE void
99 #endif
100
101 #ifndef O_NONBLOCK
102 #define O_NONBLOCK O_NDELAY
103 #endif
104
105 #define MAX_ABORTS 50
106 #define MAX_REPORTS 50
107 #define DEFAULT_CHAT_TIMEOUT 45
108
109 static int echo;
110 static int verbose;
111 static int to_log;
112 static int to_stderr;
113 static int Verbose;
114 static int quiet;
115 static int exit_code;
116 static FILE* report_fp;
117 static char *report_file;
118 static char *chat_file;
119 static char *phone_num;
120 static char *phone_num2;
121 static int timeout = DEFAULT_CHAT_TIMEOUT;
122
123 static char blank[] = "";
124
125 static int have_tty_parameters;
126
127 #define term_parms struct termios
128 #define get_term_param(param) tcgetattr(0, param)
129 #define set_term_param(param) tcsetattr(0, TCSANOW, param)
130 static struct termios saved_tty_parameters;
131
132 static char *abort_string[MAX_ABORTS], *fail_reason, fail_buffer[50];
133 static int n_aborts, abort_next, timeout_next, echo_next;
134 static int clear_abort_next;
135
136 static char *report_string[MAX_REPORTS];
137 static char report_buffer[50];
138 static int n_reports, report_next, report_gathering;
139 static int clear_report_next;
140
141 static int say_next, hup_next;
142
143 void *dup_mem(void *b, size_t c);
144 void *copy_of(char *s);
145 static void usage(void) __dead2;
146 void chat_logf(const char *fmt, ...);
147 void fatal(int code, const char *fmt, ...);
148 SIGTYPE sigalrm(int signo);
149 SIGTYPE sigint(int signo);
150 SIGTYPE sigterm(int signo);
151 SIGTYPE sighup(int signo);
152 void init(void);
153 void set_tty_parameters(void);
154 void echo_stderr(int);
155 void break_sequence(void);
156 void terminate(int status);
157 void do_file(char *chatfile);
158 int get_string(char *string);
159 int put_string(char *s);
160 int write_char(int c);
161 int put_char(int c);
162 int get_char(void);
163 void chat_send(char *s);
164 char *character(int c);
165 void chat_expect(char *s);
166 char *clean(char *s, int sending);
167 void pack_array(char **array, int end);
168 char *expect_strtok(char *, const char *);
169 int vfmtmsg(char *, int, const char *, va_list); /* vsprintf++ */
170
171 void *
dup_mem(void * b,size_t c)172 dup_mem(void *b, size_t c)
173 {
174 void *ans = malloc (c);
175 if (!ans)
176 fatal(2, "memory error!");
177
178 memcpy (ans, b, c);
179 return ans;
180 }
181
182 void *
copy_of(char * s)183 copy_of(char *s)
184 {
185 return dup_mem (s, strlen (s) + 1);
186 }
187
188 /*
189 * chat [-esSvV] [-f chat-file] [-r report-file] [-t timeout]
190 * [-T phone-number] [-U phone-number2] [chat-script]
191 * where chat-script has the form:
192 * [...[[expect[-send[-expect...]] send expect[-send[-expect]] ...]]]
193 *
194 * Perform a UUCP-dialer-like chat script on stdin and stdout.
195 */
196 int
main(int argc,char * argv[])197 main(int argc, char *argv[])
198 {
199 int option;
200
201 tzset();
202
203 while ((option = getopt(argc, argv, "ef:r:sSt:T:U:vV")) != -1) {
204 switch (option) {
205 case 'e':
206 ++echo;
207 break;
208
209 case 'f':
210 if (chat_file != NULL)
211 free(chat_file);
212 chat_file = copy_of(optarg);
213 break;
214
215 case 'r':
216 if (report_fp != NULL)
217 fclose(report_fp);
218 if (report_file != NULL)
219 free(report_file);
220 report_file = copy_of(optarg);
221 report_fp = fopen(report_file, "a");
222 if (report_fp != NULL) {
223 if (verbose)
224 fprintf(report_fp, "Opening \"%s\"...\n", report_file);
225 } else
226 fatal(2, "cannot open \"%s\" for appending", report_file);
227 break;
228
229 case 's':
230 ++to_stderr;
231 break;
232
233 case 'S':
234 to_log = 0;
235 break;
236
237 case 't':
238 timeout = atoi(optarg);
239 break;
240
241 case 'T':
242 if (phone_num != NULL)
243 free(phone_num);
244 phone_num = copy_of(optarg);
245 break;
246
247 case 'U':
248 if (phone_num2 != NULL)
249 free(phone_num2);
250 phone_num2 = copy_of(optarg);
251 break;
252
253 case 'v':
254 ++verbose;
255 break;
256
257 case 'V':
258 ++Verbose;
259 break;
260
261 default:
262 usage();
263 break;
264 }
265 }
266
267 argc -= optind;
268 argv += optind;
269
270 /*
271 * Default the report file to the stderr location
272 */
273 if (report_fp == NULL)
274 report_fp = stderr;
275
276 if (to_log) {
277 openlog("chat", LOG_PID | LOG_NDELAY, LOG_LOCAL2);
278
279 if (verbose)
280 setlogmask(LOG_UPTO(LOG_INFO));
281 else
282 setlogmask(LOG_UPTO(LOG_WARNING));
283 }
284
285 if (chat_file != NULL) {
286 if (*argv != NULL)
287 usage();
288 else {
289 init();
290 do_file(chat_file);
291 }
292 } else {
293 init();
294 while (*argv != NULL && argc > 0) {
295 chat_expect(*argv);
296 argv++;
297 argc--;
298
299 if (*argv != NULL && argc > 0) {
300 chat_send(*argv);
301 argv++;
302 argc--;
303 }
304 }
305 }
306
307 terminate(0);
308 return 0;
309 }
310
311 /*
312 * Process a chat script when read from a file.
313 */
314
315 void
do_file(char * chatfile)316 do_file(char *chatfile)
317 {
318 int linect, sendflg;
319 char *sp, *arg, quote;
320 char buf [STR_LEN];
321 FILE *cfp;
322
323 cfp = fopen (chatfile, "r");
324 if (cfp == NULL)
325 fatal(1, "%s -- open failed: %m", chatfile);
326
327 linect = 0;
328 sendflg = 0;
329
330 while (fgets(buf, STR_LEN, cfp) != NULL) {
331 sp = strchr (buf, '\n');
332 if (sp)
333 *sp = '\0';
334
335 linect++;
336 sp = buf;
337
338 /* lines starting with '#' are comments. If a real '#'
339 is to be expected, it should be quoted .... */
340 if ( *sp == '#' )
341 continue;
342
343 while (*sp != '\0') {
344 if (*sp == ' ' || *sp == '\t') {
345 ++sp;
346 continue;
347 }
348
349 if (*sp == '"' || *sp == '\'') {
350 quote = *sp++;
351 arg = sp;
352 while (*sp != quote) {
353 if (*sp == '\0')
354 fatal(1, "unterminated quote (line %d)", linect);
355
356 if (*sp++ == '\\') {
357 if (*sp != '\0')
358 ++sp;
359 }
360 }
361 }
362 else {
363 arg = sp;
364 while (*sp != '\0' && *sp != ' ' && *sp != '\t')
365 ++sp;
366 }
367
368 if (*sp != '\0')
369 *sp++ = '\0';
370
371 if (sendflg)
372 chat_send (arg);
373 else
374 chat_expect (arg);
375 sendflg = !sendflg;
376 }
377 }
378 fclose (cfp);
379 }
380
381 /*
382 * We got an error parsing the command line.
383 */
384 static void
usage(void)385 usage(void)
386 {
387 fprintf(stderr,
388 "Usage: chat [-esSvV] [-f chat-file] [-r report-file] [-t timeout]\n"
389 " [-T phone-number] [-U phone-number2] [chat-script]\n"
390 "where chat-script has the form:\n"
391 " [...[[expect[-send[-expect...]] send expect[-send[-expect]] ...]]]\n");
392 exit(1);
393 }
394
395 /*
396 * Send a message to syslog and/or stderr.
397 */
398 void
chat_logf(const char * fmt,...)399 chat_logf(const char *fmt, ...)
400 {
401 char line[1024];
402 va_list args;
403
404 va_start(args, fmt);
405 vfmtmsg(line, sizeof(line), fmt, args);
406 va_end(args);
407 if (to_log)
408 syslog(LOG_INFO, "%s", line);
409 if (to_stderr)
410 fprintf(stderr, "%s\n", line);
411 }
412
413 /*
414 * Print an error message and terminate.
415 */
416
417 void
fatal(int code,const char * fmt,...)418 fatal(int code, const char *fmt, ...)
419 {
420 char line[1024];
421 va_list args;
422
423 va_start(args, fmt);
424 vfmtmsg(line, sizeof(line), fmt, args);
425 va_end(args);
426 if (to_log)
427 syslog(LOG_ERR, "%s", line);
428 if (to_stderr)
429 fprintf(stderr, "%s\n", line);
430 terminate(code);
431 }
432
433 static int alarmed;
434
sigalrm(int signo __unused)435 SIGTYPE sigalrm(int signo __unused)
436 {
437 int flags;
438
439 alarm(1);
440 alarmed = 1; /* Reset alarm to avoid race window */
441 signal(SIGALRM, sigalrm); /* that can cause hanging in read() */
442
443 if ((flags = fcntl(0, F_GETFL, 0)) == -1)
444 fatal(2, "Can't get file mode flags on stdin: %m");
445
446 if (fcntl(0, F_SETFL, flags | O_NONBLOCK) == -1)
447 fatal(2, "Can't set file mode flags on stdin: %m");
448
449 if (verbose)
450 chat_logf("alarm");
451 }
452
sigint(int signo __unused)453 SIGTYPE sigint(int signo __unused)
454 {
455 fatal(2, "SIGINT");
456 }
457
sigterm(int signo __unused)458 SIGTYPE sigterm(int signo __unused)
459 {
460 fatal(2, "SIGTERM");
461 }
462
sighup(int signo __unused)463 SIGTYPE sighup(int signo __unused)
464 {
465 fatal(2, "SIGHUP");
466 }
467
init(void)468 void init(void)
469 {
470 signal(SIGINT, sigint);
471 signal(SIGTERM, sigterm);
472 signal(SIGHUP, sighup);
473
474 set_tty_parameters();
475 signal(SIGALRM, sigalrm);
476 alarm(0);
477 alarmed = 0;
478 }
479
set_tty_parameters(void)480 void set_tty_parameters(void)
481 {
482 #if defined(get_term_param)
483 term_parms t;
484
485 if (get_term_param (&t) < 0)
486 fatal(2, "Can't get terminal parameters: %m");
487
488 saved_tty_parameters = t;
489 have_tty_parameters = 1;
490
491 t.c_iflag |= IGNBRK | ISTRIP | IGNPAR;
492 t.c_oflag = 0;
493 t.c_lflag = 0;
494 t.c_cc[VERASE] =
495 t.c_cc[VKILL] = 0;
496 t.c_cc[VMIN] = 1;
497 t.c_cc[VTIME] = 0;
498
499 if (set_term_param (&t) < 0)
500 fatal(2, "Can't set terminal parameters: %m");
501 #endif
502 }
503
break_sequence(void)504 void break_sequence(void)
505 {
506 tcsendbreak (0, 0);
507 }
508
terminate(int status)509 void terminate(int status)
510 {
511 echo_stderr(-1);
512 if (report_file != (char *) 0 && report_fp != (FILE *) NULL) {
513 /*
514 * Allow the last of the report string to be gathered before we terminate.
515 */
516 if (report_gathering) {
517 int c;
518 size_t rep_len;
519
520 rep_len = strlen(report_buffer);
521 while (rep_len + 1 < sizeof(report_buffer)) {
522 alarm(1);
523 c = get_char();
524 alarm(0);
525 if (c < 0 || iscntrl(c))
526 break;
527 report_buffer[rep_len] = c;
528 ++rep_len;
529 }
530 report_buffer[rep_len] = 0;
531 fprintf (report_fp, "chat: %s\n", report_buffer);
532 }
533 if (verbose)
534 fprintf (report_fp, "Closing \"%s\".\n", report_file);
535 fclose (report_fp);
536 report_fp = (FILE *) NULL;
537 }
538
539 #if defined(get_term_param)
540 if (have_tty_parameters) {
541 if (set_term_param (&saved_tty_parameters) < 0)
542 fatal(2, "Can't restore terminal parameters: %m");
543 }
544 #endif
545
546 exit(status);
547 }
548
549 /*
550 * 'Clean up' this string.
551 */
552 char *
clean(char * s,int sending)553 clean(char *s, int sending)
554 {
555 char temp[STR_LEN], cur_chr;
556 char *s1, *phchar;
557 int add_return = sending;
558 #define isoctal(chr) (((chr) >= '0') && ((chr) <= '7'))
559
560 s1 = temp;
561 /* Don't overflow buffer, leave room for chars we append later */
562 while (*s && s1 - temp < (off_t)(sizeof(temp) - 2 - add_return)) {
563 cur_chr = *s++;
564 if (cur_chr == '^') {
565 cur_chr = *s++;
566 if (cur_chr == '\0') {
567 *s1++ = '^';
568 break;
569 }
570 cur_chr &= 0x1F;
571 if (cur_chr != 0) {
572 *s1++ = cur_chr;
573 }
574 continue;
575 }
576
577 if (cur_chr != '\\') {
578 *s1++ = cur_chr;
579 continue;
580 }
581
582 cur_chr = *s++;
583 if (cur_chr == '\0') {
584 if (sending) {
585 *s1++ = '\\';
586 *s1++ = '\\';
587 }
588 break;
589 }
590
591 switch (cur_chr) {
592 case 'b':
593 *s1++ = '\b';
594 break;
595
596 case 'c':
597 if (sending && *s == '\0')
598 add_return = 0;
599 else
600 *s1++ = cur_chr;
601 break;
602
603 case '\\':
604 case 'K':
605 case 'p':
606 case 'd':
607 if (sending)
608 *s1++ = '\\';
609
610 *s1++ = cur_chr;
611 break;
612
613 case 'T':
614 if (sending && phone_num) {
615 for ( phchar = phone_num; *phchar != '\0'; phchar++)
616 *s1++ = *phchar;
617 }
618 else {
619 *s1++ = '\\';
620 *s1++ = 'T';
621 }
622 break;
623
624 case 'U':
625 if (sending && phone_num2) {
626 for ( phchar = phone_num2; *phchar != '\0'; phchar++)
627 *s1++ = *phchar;
628 }
629 else {
630 *s1++ = '\\';
631 *s1++ = 'U';
632 }
633 break;
634
635 case 'q':
636 quiet = 1;
637 break;
638
639 case 'r':
640 *s1++ = '\r';
641 break;
642
643 case 'n':
644 *s1++ = '\n';
645 break;
646
647 case 's':
648 *s1++ = ' ';
649 break;
650
651 case 't':
652 *s1++ = '\t';
653 break;
654
655 case 'N':
656 if (sending) {
657 *s1++ = '\\';
658 *s1++ = '\0';
659 }
660 else
661 *s1++ = 'N';
662 break;
663
664 default:
665 if (isoctal (cur_chr)) {
666 cur_chr &= 0x07;
667 if (isoctal (*s)) {
668 cur_chr <<= 3;
669 cur_chr |= *s++ - '0';
670 if (isoctal (*s)) {
671 cur_chr <<= 3;
672 cur_chr |= *s++ - '0';
673 }
674 }
675
676 if (cur_chr != 0 || sending) {
677 if (sending && (cur_chr == '\\' || cur_chr == 0))
678 *s1++ = '\\';
679 *s1++ = cur_chr;
680 }
681 break;
682 }
683
684 if (sending)
685 *s1++ = '\\';
686 *s1++ = cur_chr;
687 break;
688 }
689 }
690
691 if (add_return)
692 *s1++ = '\r';
693
694 *s1++ = '\0'; /* guarantee closure */
695 *s1++ = '\0'; /* terminate the string */
696 return dup_mem (temp, (size_t) (s1 - temp)); /* may have embedded nuls */
697 }
698
699 /*
700 * A modified version of 'strtok'. This version skips \ sequences.
701 */
702
703 char *
expect_strtok(char * s,const char * term)704 expect_strtok (char *s, const char *term)
705 {
706 static char *str = blank;
707 int escape_flag = 0;
708 char *result;
709
710 /*
711 * If a string was specified then do initial processing.
712 */
713 if (s)
714 str = s;
715
716 /*
717 * If this is the escape flag then reset it and ignore the character.
718 */
719 if (*str)
720 result = str;
721 else
722 result = (char *) 0;
723
724 while (*str) {
725 if (escape_flag) {
726 escape_flag = 0;
727 ++str;
728 continue;
729 }
730
731 if (*str == '\\') {
732 ++str;
733 escape_flag = 1;
734 continue;
735 }
736
737 /*
738 * If this is not in the termination string, continue.
739 */
740 if (strchr (term, *str) == (char *) 0) {
741 ++str;
742 continue;
743 }
744
745 /*
746 * This is the terminator. Mark the end of the string and stop.
747 */
748 *str++ = '\0';
749 break;
750 }
751 return (result);
752 }
753
754 /*
755 * Process the expect string
756 */
757
758 void
chat_expect(char * s)759 chat_expect(char *s)
760 {
761 char *expect;
762 char *reply;
763
764 if (strcmp(s, "HANGUP") == 0) {
765 ++hup_next;
766 return;
767 }
768
769 if (strcmp(s, "ABORT") == 0) {
770 ++abort_next;
771 return;
772 }
773
774 if (strcmp(s, "CLR_ABORT") == 0) {
775 ++clear_abort_next;
776 return;
777 }
778
779 if (strcmp(s, "REPORT") == 0) {
780 ++report_next;
781 return;
782 }
783
784 if (strcmp(s, "CLR_REPORT") == 0) {
785 ++clear_report_next;
786 return;
787 }
788
789 if (strcmp(s, "TIMEOUT") == 0) {
790 ++timeout_next;
791 return;
792 }
793
794 if (strcmp(s, "ECHO") == 0) {
795 ++echo_next;
796 return;
797 }
798
799 if (strcmp(s, "SAY") == 0) {
800 ++say_next;
801 return;
802 }
803
804 /*
805 * Fetch the expect and reply string.
806 */
807 for (;;) {
808 expect = expect_strtok (s, "-");
809 s = (char *) 0;
810
811 if (expect == (char *) 0)
812 return;
813
814 reply = expect_strtok (s, "-");
815
816 /*
817 * Handle the expect string. If successful then exit.
818 */
819 if (get_string (expect))
820 return;
821
822 /*
823 * If there is a sub-reply string then send it. Otherwise any condition
824 * is terminal.
825 */
826 if (reply == (char *) 0 || exit_code != 3)
827 break;
828
829 chat_send (reply);
830 }
831
832 /*
833 * The expectation did not occur. This is terminal.
834 */
835 if (fail_reason)
836 chat_logf("Failed (%s)", fail_reason);
837 else
838 chat_logf("Failed");
839 terminate(exit_code);
840 }
841
842 /*
843 * Translate the input character to the appropriate string for printing
844 * the data.
845 */
846
847 char *
character(int c)848 character(int c)
849 {
850 static char string[10];
851 const char *meta;
852
853 meta = (c & 0x80) ? "M-" : "";
854 c &= 0x7F;
855
856 if (c < 32)
857 sprintf(string, "%s^%c", meta, (int)c + '@');
858 else if (c == 127)
859 sprintf(string, "%s^?", meta);
860 else
861 sprintf(string, "%s%c", meta, c);
862
863 return (string);
864 }
865
866 /*
867 * process the reply string
868 */
869 void
chat_send(char * s)870 chat_send(char *s)
871 {
872 if (say_next) {
873 say_next = 0;
874 s = clean(s,0);
875 write(STDERR_FILENO, s, strlen(s));
876 free(s);
877 return;
878 }
879
880 if (hup_next) {
881 hup_next = 0;
882 if (strcmp(s, "OFF") == 0)
883 signal(SIGHUP, SIG_IGN);
884 else
885 signal(SIGHUP, sighup);
886 return;
887 }
888
889 if (echo_next) {
890 echo_next = 0;
891 echo = (strcmp(s, "ON") == 0);
892 return;
893 }
894
895 if (abort_next) {
896 char *s1;
897
898 abort_next = 0;
899
900 if (n_aborts >= MAX_ABORTS)
901 fatal(2, "Too many ABORT strings");
902
903 s1 = clean(s, 0);
904
905 if (strlen(s1) > strlen(s)
906 || strlen(s1) + 1 > sizeof(fail_buffer))
907 fatal(1, "Illegal or too-long ABORT string ('%v')", s);
908
909 abort_string[n_aborts++] = s1;
910
911 if (verbose)
912 chat_logf("abort on (%v)", s);
913 return;
914 }
915
916 if (clear_abort_next) {
917 char *s1;
918 int i;
919 int old_max;
920 int pack = 0;
921
922 clear_abort_next = 0;
923
924 s1 = clean(s, 0);
925
926 if (strlen(s1) > strlen(s)
927 || strlen(s1) + 1 > sizeof(fail_buffer))
928 fatal(1, "Illegal or too-long CLR_ABORT string ('%v')", s);
929
930 old_max = n_aborts;
931 for (i=0; i < n_aborts; i++) {
932 if ( strcmp(s1,abort_string[i]) == 0 ) {
933 free(abort_string[i]);
934 abort_string[i] = NULL;
935 pack++;
936 n_aborts--;
937 if (verbose)
938 chat_logf("clear abort on (%v)", s);
939 }
940 }
941 free(s1);
942 if (pack)
943 pack_array(abort_string,old_max);
944 return;
945 }
946
947 if (report_next) {
948 char *s1;
949
950 report_next = 0;
951 if (n_reports >= MAX_REPORTS)
952 fatal(2, "Too many REPORT strings");
953
954 s1 = clean(s, 0);
955
956 if (strlen(s1) > strlen(s) || strlen(s1) > sizeof fail_buffer - 1)
957 fatal(1, "Illegal or too-long REPORT string ('%v')", s);
958
959 report_string[n_reports++] = s1;
960
961 if (verbose)
962 chat_logf("report (%v)", s);
963 return;
964 }
965
966 if (clear_report_next) {
967 char *s1;
968 int i;
969 int old_max;
970 int pack = 0;
971
972 clear_report_next = 0;
973
974 s1 = clean(s, 0);
975
976 if (strlen(s1) > strlen(s) || strlen(s1) > sizeof fail_buffer - 1)
977 fatal(1, "Illegal or too-long REPORT string ('%v')", s);
978
979 old_max = n_reports;
980 for (i=0; i < n_reports; i++) {
981 if ( strcmp(s1,report_string[i]) == 0 ) {
982 free(report_string[i]);
983 report_string[i] = NULL;
984 pack++;
985 n_reports--;
986 if (verbose)
987 chat_logf("clear report (%v)", s);
988 }
989 }
990 free(s1);
991 if (pack)
992 pack_array(report_string,old_max);
993
994 return;
995 }
996
997 if (timeout_next) {
998 timeout_next = 0;
999 timeout = atoi(s);
1000
1001 if (timeout <= 0)
1002 timeout = DEFAULT_CHAT_TIMEOUT;
1003
1004 if (verbose)
1005 chat_logf("timeout set to %d seconds", timeout);
1006
1007 return;
1008 }
1009
1010 if (strcmp(s, "EOT") == 0)
1011 s = strdup("^D\\c");
1012 else if (strcmp(s, "BREAK") == 0)
1013 s = strdup("\\K\\c");
1014
1015 if (!put_string(s))
1016 fatal(1, "Failed");
1017 }
1018
1019 int
get_char(void)1020 get_char(void)
1021 {
1022 int status;
1023 char c;
1024
1025 status = read(STDIN_FILENO, &c, 1);
1026
1027 switch (status) {
1028 case 1:
1029 return ((int)c & 0x7F);
1030
1031 default:
1032 chat_logf("warning: read() on stdin returned %d", status);
1033
1034 case -1:
1035 if ((status = fcntl(0, F_GETFL, 0)) == -1)
1036 fatal(2, "Can't get file mode flags on stdin: %m");
1037
1038 if (fcntl(0, F_SETFL, status & ~O_NONBLOCK) == -1)
1039 fatal(2, "Can't set file mode flags on stdin: %m");
1040
1041 return (-1);
1042 }
1043 }
1044
put_char(int c)1045 int put_char(int c)
1046 {
1047 int status;
1048 char ch = c;
1049
1050 usleep(10000); /* inter-character typing delay (?) */
1051
1052 status = write(STDOUT_FILENO, &ch, 1);
1053
1054 switch (status) {
1055 case 1:
1056 return (0);
1057
1058 default:
1059 chat_logf("warning: write() on stdout returned %d", status);
1060
1061 case -1:
1062 if ((status = fcntl(0, F_GETFL, 0)) == -1)
1063 fatal(2, "Can't get file mode flags on stdin, %m");
1064
1065 if (fcntl(0, F_SETFL, status & ~O_NONBLOCK) == -1)
1066 fatal(2, "Can't set file mode flags on stdin: %m");
1067
1068 return (-1);
1069 }
1070 }
1071
1072 int
write_char(int c)1073 write_char(int c)
1074 {
1075 if (alarmed || put_char(c) < 0) {
1076 alarm(0);
1077 alarmed = 0;
1078
1079 if (verbose) {
1080 if (errno == EINTR || errno == EWOULDBLOCK)
1081 chat_logf(" -- write timed out");
1082 else
1083 chat_logf(" -- write failed: %m");
1084 }
1085 return (0);
1086 }
1087 return (1);
1088 }
1089
1090 int
put_string(char * s)1091 put_string(char *s)
1092 {
1093 quiet = 0;
1094 s = clean(s, 1);
1095
1096 if (verbose)
1097 chat_logf("send (%v)", quiet ? "??????" : s);
1098
1099 alarm(timeout); alarmed = 0;
1100
1101 while (*s) {
1102 char c = *s++;
1103
1104 if (c != '\\') {
1105 if (!write_char (c))
1106 return 0;
1107 continue;
1108 }
1109
1110 c = *s++;
1111 switch (c) {
1112 case 'd':
1113 sleep(1);
1114 break;
1115
1116 case 'K':
1117 break_sequence();
1118 break;
1119
1120 case 'p':
1121 usleep(10000); /* 1/100th of a second (arg is microseconds) */
1122 break;
1123
1124 default:
1125 if (!write_char (c))
1126 return 0;
1127 break;
1128 }
1129 }
1130
1131 alarm(0);
1132 alarmed = 0;
1133 return (1);
1134 }
1135
1136 /*
1137 * Echo a character to stderr.
1138 * When called with -1, a '\n' character is generated when
1139 * the cursor is not at the beginning of a line.
1140 */
1141 void
echo_stderr(int n)1142 echo_stderr(int n)
1143 {
1144 static int need_lf;
1145 char *s;
1146
1147 switch (n) {
1148 case '\r': /* ignore '\r' */
1149 break;
1150 case -1:
1151 if (need_lf == 0)
1152 break;
1153 /* FALLTHROUGH */
1154 case '\n':
1155 write(STDERR_FILENO, "\n", 1);
1156 need_lf = 0;
1157 break;
1158 default:
1159 s = character(n);
1160 write(STDERR_FILENO, s, strlen(s));
1161 need_lf = 1;
1162 break;
1163 }
1164 }
1165
1166 /*
1167 * 'Wait for' this string to appear on this file descriptor.
1168 */
1169 int
get_string(char * string)1170 get_string(char *string)
1171 {
1172 char temp[STR_LEN];
1173 int c;
1174 size_t len, minlen;
1175 char *s = temp, *end = s + STR_LEN;
1176 char *logged = temp;
1177
1178 fail_reason = (char *)0;
1179
1180 if (strlen(string) > STR_LEN) {
1181 chat_logf("expect string is too long");
1182 exit_code = 1;
1183 return 0;
1184 }
1185
1186 string = clean(string, 0);
1187 len = strlen(string);
1188 minlen = (len > sizeof(fail_buffer)? len: sizeof(fail_buffer)) - 1;
1189
1190 if (verbose)
1191 chat_logf("expect (%v)", string);
1192
1193 if (len == 0) {
1194 if (verbose)
1195 chat_logf("got it");
1196 return (1);
1197 }
1198
1199 alarm(timeout);
1200 alarmed = 0;
1201
1202 while ( ! alarmed && (c = get_char()) >= 0) {
1203 int n, abort_len, report_len;
1204
1205 if (echo)
1206 echo_stderr(c);
1207 if (verbose && c == '\n') {
1208 if (s == logged)
1209 chat_logf(""); /* blank line */
1210 else
1211 chat_logf("%0.*v", s - logged, logged);
1212 logged = s + 1;
1213 }
1214
1215 *s++ = c;
1216
1217 if (verbose && s >= logged + 80) {
1218 chat_logf("%0.*v", s - logged, logged);
1219 logged = s;
1220 }
1221
1222 if (Verbose) {
1223 if (c == '\n')
1224 fputc( '\n', stderr );
1225 else if (c != '\r')
1226 fprintf( stderr, "%s", character(c) );
1227 }
1228
1229 if (!report_gathering) {
1230 for (n = 0; n < n_reports; ++n) {
1231 if ((report_string[n] != (char*) NULL) &&
1232 s - temp >= (report_len = strlen(report_string[n])) &&
1233 strncmp(s - report_len, report_string[n], report_len) == 0) {
1234 time_t time_now = time ((time_t*) NULL);
1235 struct tm* tm_now = localtime (&time_now);
1236
1237 strftime (report_buffer, 20, "%b %d %H:%M:%S ", tm_now);
1238 strcat (report_buffer, report_string[n]);
1239
1240 report_string[n] = (char *) NULL;
1241 report_gathering = 1;
1242 break;
1243 }
1244 }
1245 }
1246 else {
1247 if (!iscntrl (c)) {
1248 int rep_len = strlen (report_buffer);
1249 report_buffer[rep_len] = c;
1250 report_buffer[rep_len + 1] = '\0';
1251 }
1252 else {
1253 report_gathering = 0;
1254 fprintf (report_fp, "chat: %s\n", report_buffer);
1255 }
1256 }
1257
1258 if ((size_t)(s - temp) >= len &&
1259 c == string[len - 1] &&
1260 strncmp(s - len, string, len) == 0) {
1261 if (verbose) {
1262 if (s > logged)
1263 chat_logf("%0.*v", s - logged, logged);
1264 chat_logf(" -- got it\n");
1265 }
1266
1267 alarm(0);
1268 alarmed = 0;
1269 return (1);
1270 }
1271
1272 for (n = 0; n < n_aborts; ++n) {
1273 if (s - temp >= (abort_len = strlen(abort_string[n])) &&
1274 strncmp(s - abort_len, abort_string[n], abort_len) == 0) {
1275 if (verbose) {
1276 if (s > logged)
1277 chat_logf("%0.*v", s - logged, logged);
1278 chat_logf(" -- failed");
1279 }
1280
1281 alarm(0);
1282 alarmed = 0;
1283 exit_code = n + 4;
1284 strcpy(fail_reason = fail_buffer, abort_string[n]);
1285 return (0);
1286 }
1287 }
1288
1289 if (s >= end) {
1290 if (logged < s - minlen) {
1291 chat_logf("%0.*v", s - logged, logged);
1292 logged = s;
1293 }
1294 s -= minlen;
1295 memmove(temp, s, minlen);
1296 logged = temp + (logged - s);
1297 s = temp + minlen;
1298 }
1299
1300 if (alarmed && verbose)
1301 chat_logf("warning: alarm synchronization problem");
1302 }
1303
1304 alarm(0);
1305
1306 exit_code = 3;
1307 alarmed = 0;
1308 return (0);
1309 }
1310
1311 void
pack_array(char ** array,int end)1312 pack_array(char **array, int end)
1313 {
1314 int i, j;
1315
1316 for (i = 0; i < end; i++) {
1317 if (array[i] == NULL) {
1318 for (j = i+1; j < end; ++j)
1319 if (array[j] != NULL)
1320 array[i++] = array[j];
1321 for (; i < end; ++i)
1322 array[i] = NULL;
1323 break;
1324 }
1325 }
1326 }
1327
1328 /*
1329 * vfmtmsg - format a message into a buffer. Like vsprintf except we
1330 * also specify the length of the output buffer, and we handle the
1331 * %m (error message) format.
1332 * Doesn't do floating-point formats.
1333 * Returns the number of chars put into buf.
1334 */
1335 #define OUTCHAR(c) (buflen > 0? (--buflen, *buf++ = (c)): 0)
1336
1337 int
vfmtmsg(char * buf,int buflen,const char * fmt,va_list args)1338 vfmtmsg(char *buf, int buflen, const char *fmt, va_list args)
1339 {
1340 int c, i, n;
1341 int width, prec, fillch;
1342 int base, len, neg, quoted;
1343 unsigned long val = 0;
1344 char *str, *buf0;
1345 const char *f;
1346 unsigned char *p;
1347 char num[32];
1348 static char hexchars[] = "0123456789abcdef";
1349
1350 buf0 = buf;
1351 --buflen;
1352 while (buflen > 0) {
1353 for (f = fmt; *f != '%' && *f != 0; ++f)
1354 ;
1355 if (f > fmt) {
1356 len = f - fmt;
1357 if (len > buflen)
1358 len = buflen;
1359 memcpy(buf, fmt, len);
1360 buf += len;
1361 buflen -= len;
1362 fmt = f;
1363 }
1364 if (*fmt == 0)
1365 break;
1366 c = *++fmt;
1367 width = prec = 0;
1368 fillch = ' ';
1369 if (c == '0') {
1370 fillch = '0';
1371 c = *++fmt;
1372 }
1373 if (c == '*') {
1374 width = va_arg(args, int);
1375 c = *++fmt;
1376 } else {
1377 while (isdigit(c)) {
1378 width = width * 10 + c - '0';
1379 c = *++fmt;
1380 }
1381 }
1382 if (c == '.') {
1383 c = *++fmt;
1384 if (c == '*') {
1385 prec = va_arg(args, int);
1386 c = *++fmt;
1387 } else {
1388 while (isdigit(c)) {
1389 prec = prec * 10 + c - '0';
1390 c = *++fmt;
1391 }
1392 }
1393 }
1394 str = NULL;
1395 base = 0;
1396 neg = 0;
1397 ++fmt;
1398 switch (c) {
1399 case 'd':
1400 i = va_arg(args, int);
1401 if (i < 0) {
1402 neg = 1;
1403 val = -i;
1404 } else
1405 val = i;
1406 base = 10;
1407 break;
1408 case 'o':
1409 val = va_arg(args, unsigned int);
1410 base = 8;
1411 break;
1412 case 'x':
1413 val = va_arg(args, unsigned int);
1414 base = 16;
1415 break;
1416 case 'p':
1417 val = (unsigned long) va_arg(args, void *);
1418 base = 16;
1419 neg = 2;
1420 break;
1421 case 's':
1422 str = va_arg(args, char *);
1423 break;
1424 case 'c':
1425 num[0] = va_arg(args, int);
1426 num[1] = 0;
1427 str = num;
1428 break;
1429 case 'm':
1430 str = strerror(errno);
1431 break;
1432 case 'v': /* "visible" string */
1433 case 'q': /* quoted string */
1434 quoted = c == 'q';
1435 p = va_arg(args, unsigned char *);
1436 if (fillch == '0' && prec > 0) {
1437 n = prec;
1438 } else {
1439 n = strlen((char *)p);
1440 if (prec > 0 && prec < n)
1441 n = prec;
1442 }
1443 while (n > 0 && buflen > 0) {
1444 c = *p++;
1445 --n;
1446 if (!quoted && c >= 0x80) {
1447 OUTCHAR('M');
1448 OUTCHAR('-');
1449 c -= 0x80;
1450 }
1451 if (quoted && (c == '"' || c == '\\'))
1452 OUTCHAR('\\');
1453 if (c < 0x20 || (0x7f <= c && c < 0xa0)) {
1454 if (quoted) {
1455 OUTCHAR('\\');
1456 switch (c) {
1457 case '\t': OUTCHAR('t'); break;
1458 case '\n': OUTCHAR('n'); break;
1459 case '\b': OUTCHAR('b'); break;
1460 case '\f': OUTCHAR('f'); break;
1461 default:
1462 OUTCHAR('x');
1463 OUTCHAR(hexchars[c >> 4]);
1464 OUTCHAR(hexchars[c & 0xf]);
1465 }
1466 } else {
1467 if (c == '\t')
1468 OUTCHAR(c);
1469 else {
1470 OUTCHAR('^');
1471 OUTCHAR(c ^ 0x40);
1472 }
1473 }
1474 } else
1475 OUTCHAR(c);
1476 }
1477 continue;
1478 default:
1479 *buf++ = '%';
1480 if (c != '%')
1481 --fmt; /* so %z outputs %z etc. */
1482 --buflen;
1483 continue;
1484 }
1485 if (base != 0) {
1486 str = num + sizeof(num);
1487 *--str = 0;
1488 while (str > num + neg) {
1489 *--str = hexchars[val % base];
1490 val = val / base;
1491 if (--prec <= 0 && val == 0)
1492 break;
1493 }
1494 switch (neg) {
1495 case 1:
1496 *--str = '-';
1497 break;
1498 case 2:
1499 *--str = 'x';
1500 *--str = '0';
1501 break;
1502 }
1503 len = num + sizeof(num) - 1 - str;
1504 } else {
1505 len = strlen(str);
1506 if (prec > 0 && len > prec)
1507 len = prec;
1508 }
1509 if (width > 0) {
1510 if (width > buflen)
1511 width = buflen;
1512 if ((n = width - len) > 0) {
1513 buflen -= n;
1514 for (; n > 0; --n)
1515 *buf++ = fillch;
1516 }
1517 }
1518 if (len > buflen)
1519 len = buflen;
1520 memcpy(buf, str, len);
1521 buf += len;
1522 buflen -= len;
1523 }
1524 *buf = 0;
1525 return buf - buf0;
1526 }
1527