1 /* $OpenBSD: chat.c,v 1.12 1999/12/02 02:32:29 d Exp $ */ 2 3 /* 4 * Chat -- a program for automatic session establishment (i.e. dial 5 * the phone and log in). 6 * 7 * Standard termination codes: 8 * 0 - successful completion of the script 9 * 1 - invalid argument, expect string too large, etc. 10 * 2 - error on an I/O operation or fatal error condition. 11 * 3 - timeout waiting for a simple string. 12 * 4 - the first string declared as "ABORT" 13 * 5 - the second string declared as "ABORT" 14 * 6 - ... and so on for successive ABORT strings. 15 * 16 * This software is in the public domain. 17 * 18 * ----------------- 19 * added -T and -U option and \T and \U substitution to pass a phone 20 * number into chat script. Two are needed for some ISDN TA applications. 21 * Keith Dart <kdart@cisco.com> 22 * 23 * 24 * Added SAY keyword to send output to stderr. 25 * This allows to turn ECHO OFF and to output specific, user selected, 26 * text to give progress messages. This best works when stderr 27 * exists (i.e.: pppd in nodetach mode). 28 * 29 * Added HANGUP directives to allow for us to be called 30 * back. When HANGUP is set to NO, chat will not hangup at HUP signal. 31 * We rely on timeouts in that case. 32 * 33 * Added CLR_ABORT to clear previously set ABORT string. This has been 34 * dictated by the HANGUP above as "NO CARRIER" (for example) must be 35 * an ABORT condition until we know the other host is going to close 36 * the connection for call back. As soon as we have completed the 37 * first stage of the call back sequence, "NO CARRIER" is a valid, non 38 * fatal string. As soon as we got called back (probably get "CONNECT"), 39 * we should re-arm the ABORT "NO CARRIER". Hence the CLR_ABORT command. 40 * Note that CLR_ABORT packs the abort_strings[] array so that we do not 41 * have unused entries not being reclaimed. 42 * 43 * In the same vein as above, added CLR_REPORT keyword. 44 * 45 * Allow for comments. Line starting with '#' are comments and are 46 * ignored. If a '#' is to be expected as the first character, the 47 * expect string must be quoted. 48 * 49 * 50 * Francis Demierre <Francis@SwissMail.Com> 51 * Thu May 15 17:15:40 MET DST 1997 52 * 53 * 54 * Added -r "report file" switch & REPORT keyword. 55 * Robert Geer <bgeer@xmission.com> 56 * 57 * Added -s "use stderr" and -S "don't use syslog" switches. 58 * June 18, 1997 59 * Karl O. Pinc <kop@meme.com> 60 * 61 * 62 * Added -e "echo" switch & ECHO keyword 63 * Dick Streefland <dicks@tasking.nl> 64 * 65 * 66 * Considerable updates and modifications by 67 * Al Longyear <longyear@pobox.com> 68 * Paul Mackerras <paulus@cs.anu.edu.au> 69 * 70 * 71 * The original author is: 72 * 73 * Karl Fox <karl@MorningStar.Com> 74 * Morning Star Technologies, Inc. 75 * 1760 Zollinger Road 76 * Columbus, OH 43221 77 * (614)451-1883 78 * 79 * 80 */ 81 82 #ifndef lint 83 #if 0 84 static char rcsid[] = "Id: chat.c,v 1.19 1998/03/24 23:57:48 paulus Exp $"; 85 #else 86 static char rcsid[] = "$OpenBSD: chat.c,v 1.12 1999/12/02 02:32:29 d Exp $"; 87 #endif 88 #endif 89 90 #include <stdio.h> 91 #include <ctype.h> 92 #include <time.h> 93 #include <fcntl.h> 94 #include <signal.h> 95 #include <errno.h> 96 #include <string.h> 97 #include <stdlib.h> 98 #include <unistd.h> 99 #include <sys/types.h> 100 #include <sys/stat.h> 101 #include <syslog.h> 102 103 #ifndef TERMIO 104 #undef TERMIOS 105 #define TERMIOS 106 #endif 107 108 #ifdef TERMIO 109 #include <termio.h> 110 #endif 111 #ifdef TERMIOS 112 #include <termios.h> 113 #endif 114 115 #define STR_LEN 1024 116 117 #ifndef SIGTYPE 118 #define SIGTYPE void 119 #endif 120 121 #undef __P 122 #undef __V 123 124 #ifdef __STDC__ 125 #include <stdarg.h> 126 #define __V(x) x 127 #define __P(x) x 128 #else 129 #include <varargs.h> 130 #define __V(x) (va_alist) va_dcl 131 #define __P(x) () 132 #define const 133 #endif 134 135 #ifndef O_NONBLOCK 136 #define O_NONBLOCK O_NDELAY 137 #endif 138 139 #ifdef SUNOS 140 extern int sys_nerr; 141 extern char *sys_errlist[]; 142 #define memmove(to, from, n) bcopy(from, to, n) 143 #define strerror(n) ((unsigned)(n) < sys_nerr? sys_errlist[(n)] :\ 144 "unknown error") 145 #endif 146 147 #define MAX_ABORTS 50 148 #define MAX_REPORTS 50 149 #define DEFAULT_CHAT_TIMEOUT 45 150 151 int echo = 0; 152 int verbose = 0; 153 int to_log = 1; 154 int to_stderr = 0; 155 int Verbose = 0; 156 int quiet = 0; 157 int report = 0; 158 int exit_code = 0; 159 FILE* report_fp = (FILE *) 0; 160 char *report_file = (char *) 0; 161 char *chat_file = (char *) 0; 162 char *phone_num = (char *) 0; 163 char *phone_num2 = (char *) 0; 164 int timeout = DEFAULT_CHAT_TIMEOUT; 165 166 int have_tty_parameters = 0; 167 168 extern char *__progname; 169 170 #ifdef TERMIO 171 #define term_parms struct termio 172 #define get_term_param(param) ioctl(0, TCGETA, param) 173 #define set_term_param(param) ioctl(0, TCSETA, param) 174 struct termio saved_tty_parameters; 175 #endif 176 177 #ifdef TERMIOS 178 #define term_parms struct termios 179 #define get_term_param(param) tcgetattr(0, param) 180 #define set_term_param(param) tcsetattr(0, TCSANOW, param) 181 struct termios saved_tty_parameters; 182 #endif 183 184 char *abort_string[MAX_ABORTS], *fail_reason = (char *)0, 185 fail_buffer[50]; 186 int n_aborts = 0, abort_next = 0, timeout_next = 0, echo_next = 0; 187 int clear_abort_next = 0; 188 189 char *report_string[MAX_REPORTS] ; 190 char report_buffer[50] ; 191 int n_reports = 0, report_next = 0, report_gathering = 0 ; 192 int clear_report_next = 0; 193 194 int say_next = 0, hup_next = 0; 195 196 void *dup_mem __P((void *b, size_t c)); 197 void *copy_of __P((char *s)); 198 void usage __P((void)); 199 void logf __P((const char *fmt, ...)); 200 void fatal __P((int code, const char *fmt, ...)); 201 SIGTYPE sigalrm __P((int signo)); 202 SIGTYPE sigint __P((int signo)); 203 SIGTYPE sigterm __P((int signo)); 204 SIGTYPE sighup __P((int signo)); 205 void unalarm __P((void)); 206 void init __P((void)); 207 void set_tty_parameters __P((void)); 208 void echo_stderr __P((int)); 209 void break_sequence __P((void)); 210 void terminate __P((int status)); 211 void do_file __P((char *chat_file)); 212 int get_string __P((register char *string)); 213 int put_string __P((register char *s)); 214 int write_char __P((int c)); 215 int put_char __P((int c)); 216 int get_char __P((void)); 217 void chat_send __P((register char *s)); 218 char *character __P((int c)); 219 void chat_expect __P((register char *s)); 220 char *clean __P((register char *s, int sending)); 221 void break_sequence __P((void)); 222 void terminate __P((int status)); 223 void pack_array __P((char **array, int end)); 224 char *expect_strtok __P((char *, char *)); 225 int vfmtmsg __P((char *, int, const char *, va_list)); /* vsprintf++ */ 226 227 int main __P((int, char *[])); 228 229 void *dup_mem(b, c) 230 void *b; 231 size_t c; 232 { 233 void *ans = malloc (c); 234 if (!ans) 235 fatal(2, "memory error!"); 236 237 memcpy (ans, b, c); 238 return ans; 239 } 240 241 void *copy_of (s) 242 char *s; 243 { 244 return dup_mem (s, strlen (s) + 1); 245 } 246 247 /* 248 * chat [ -v ] [-T number] [-U number] [ -t timeout ] [ -f chat-file ] \ 249 * [ -r report-file ] \ 250 * [...[[expect[-say[-expect...]] say expect[-say[-expect]] ...]]] 251 * 252 * Perform a UUCP-dialer-like chat script on stdin and stdout. 253 */ 254 int 255 main(argc, argv) 256 int argc; 257 char **argv; 258 { 259 int option; 260 261 tzset(); 262 263 while ((option = getopt(argc, argv, "esSvVt:r:f:T:U:")) != -1) { 264 switch (option) { 265 case 'e': 266 ++echo; 267 break; 268 269 case 'v': 270 ++verbose; 271 break; 272 273 case 'V': 274 ++Verbose; 275 break; 276 277 case 's': 278 ++to_stderr; 279 break; 280 281 case 'S': 282 to_log = 0; 283 break; 284 285 case 'f': 286 chat_file = copy_of(optarg); 287 break; 288 289 case 't': 290 timeout = atoi(optarg); 291 break; 292 293 case 'r': 294 if (report_fp != NULL) 295 fclose (report_fp); 296 report_file = copy_of (optarg); 297 report_fp = fopen (report_file, "a"); 298 if (report_fp != NULL) { 299 if (verbose) 300 fprintf (report_fp, "Opening \"%s\"...\n", 301 report_file); 302 report = 1; 303 } 304 break; 305 306 case 'T': 307 phone_num = copy_of(optarg); 308 break; 309 310 case 'U': 311 phone_num2 = copy_of(optarg); 312 break; 313 314 case ':': 315 fprintf(stderr, "Option -%c requires an argument\n", 316 optopt); 317 318 default: 319 usage(); 320 break; 321 } 322 } 323 argc -= optind; 324 argv += optind; 325 /* 326 * Default the report file to the stderr location 327 */ 328 if (report_fp == NULL) 329 report_fp = stderr; 330 331 if (to_log) { 332 #ifdef ultrix 333 openlog("chat", LOG_PID); 334 #else 335 openlog("chat", LOG_PID | LOG_NDELAY, LOG_LOCAL2); 336 337 if (verbose) 338 setlogmask(LOG_UPTO(LOG_INFO)); 339 else 340 setlogmask(LOG_UPTO(LOG_WARNING)); 341 #endif 342 } 343 344 init(); 345 346 if (chat_file != NULL) { 347 if (argc > 0) 348 usage(); 349 else 350 do_file (chat_file); 351 } else { 352 while (argc-- > 0) { 353 chat_expect(*argv++); 354 355 if (argc-- > 0) { 356 chat_send(*argv++); 357 } 358 } 359 } 360 361 terminate(0); 362 return 0; 363 } 364 365 /* 366 * Process a chat script when read from a file. 367 */ 368 369 void do_file (chat_file) 370 char *chat_file; 371 { 372 int linect, sendflg; 373 char *sp, *arg, quote; 374 char buf [STR_LEN]; 375 FILE *cfp; 376 377 cfp = fopen (chat_file, "r"); 378 if (cfp == NULL) 379 fatal(1, "%s -- open failed: %m", chat_file); 380 381 linect = 0; 382 sendflg = 0; 383 384 while (fgets(buf, STR_LEN, cfp) != NULL) { 385 sp = strchr (buf, '\n'); 386 if (sp) 387 *sp = '\0'; 388 389 linect++; 390 sp = buf; 391 392 /* lines starting with '#' are comments. If a real '#' 393 is to be expected, it should be quoted .... */ 394 if ( *sp == '#' ) 395 continue; 396 397 while (*sp != '\0') { 398 if (*sp == ' ' || *sp == '\t') { 399 ++sp; 400 continue; 401 } 402 403 if (*sp == '"' || *sp == '\'') { 404 quote = *sp++; 405 arg = sp; 406 while (*sp != quote) { 407 if (*sp == '\0') 408 fatal(1, "unterminated quote (line %d)", linect); 409 410 if (*sp++ == '\\') { 411 if (*sp != '\0') 412 ++sp; 413 } 414 } 415 } 416 else { 417 arg = sp; 418 while (*sp != '\0' && *sp != ' ' && *sp != '\t') 419 ++sp; 420 } 421 422 if (*sp != '\0') 423 *sp++ = '\0'; 424 425 if (sendflg) 426 chat_send (arg); 427 else 428 chat_expect (arg); 429 sendflg = !sendflg; 430 } 431 } 432 fclose (cfp); 433 } 434 435 /* 436 * We got an error parsing the command line. 437 */ 438 void usage() 439 { 440 fprintf(stderr, "\ 441 Usage: %s [-e] [-s] [-S] [-v] [-V] [-t timeout] [-r report-file]\n\ 442 [-T phone-number] [-U phone-number2] {-f chat-file | chat-script}\n", 443 __progname); 444 exit(1); 445 } 446 447 char line[1024]; 448 449 /* 450 * Send a message to syslog and/or stderr. 451 */ 452 void logf __V((const char *fmt, ...)) 453 { 454 va_list args; 455 456 #ifdef __STDC__ 457 va_start(args, fmt); 458 #else 459 char *fmt; 460 va_start(args); 461 fmt = va_arg(args, char *); 462 #endif 463 464 vfmtmsg(line, sizeof(line), fmt, args); 465 if (to_log) 466 syslog(LOG_INFO, "%s", line); 467 if (to_stderr) 468 fprintf(stderr, "%s\n", line); 469 } 470 471 /* 472 * Print an error message and terminate. 473 */ 474 475 void fatal __V((int code, const char *fmt, ...)) 476 { 477 va_list args; 478 479 #ifdef __STDC__ 480 va_start(args, fmt); 481 #else 482 int code; 483 char *fmt; 484 va_start(args); 485 code = va_arg(args, int); 486 fmt = va_arg(args, char *); 487 #endif 488 489 vfmtmsg(line, sizeof(line), fmt, args); 490 if (to_log) 491 syslog(LOG_ERR, "%s", line); 492 if (to_stderr) 493 fprintf(stderr, "%s\n", line); 494 terminate(code); 495 } 496 497 int alarmed = 0; 498 499 SIGTYPE sigalrm(signo) 500 int signo; 501 { 502 int flags; 503 504 alarm(1); 505 alarmed = 1; /* Reset alarm to avoid race window */ 506 signal(SIGALRM, sigalrm); /* that can cause hanging in read() */ 507 508 if ((flags = fcntl(0, F_GETFL, 0)) == -1) 509 fatal(2, "Can't get file mode flags on stdin: %m"); 510 511 if (fcntl(0, F_SETFL, flags | O_NONBLOCK) == -1) 512 fatal(2, "Can't set file mode flags on stdin: %m"); 513 514 if (verbose) 515 logf("alarm"); 516 } 517 518 void unalarm() 519 { 520 int flags; 521 522 if ((flags = fcntl(0, F_GETFL, 0)) == -1) 523 fatal(2, "Can't get file mode flags on stdin: %m"); 524 525 if (fcntl(0, F_SETFL, flags & ~O_NONBLOCK) == -1) 526 fatal(2, "Can't set file mode flags on stdin: %m"); 527 } 528 529 SIGTYPE sigint(signo) 530 int signo; 531 { 532 fatal(2, "SIGINT"); 533 } 534 535 SIGTYPE sigterm(signo) 536 int signo; 537 { 538 fatal(2, "SIGTERM"); 539 } 540 541 SIGTYPE sighup(signo) 542 int signo; 543 { 544 fatal(2, "SIGHUP"); 545 } 546 547 void init() 548 { 549 signal(SIGINT, sigint); 550 signal(SIGTERM, sigterm); 551 signal(SIGHUP, sighup); 552 553 set_tty_parameters(); 554 signal(SIGALRM, sigalrm); 555 alarm(0); 556 alarmed = 0; 557 } 558 559 void set_tty_parameters() 560 { 561 #if defined(get_term_param) 562 term_parms t; 563 564 if (get_term_param (&t) < 0) 565 fatal(2, "Can't get terminal parameters: %m"); 566 567 saved_tty_parameters = t; 568 have_tty_parameters = 1; 569 570 t.c_iflag |= IGNBRK | ISTRIP | IGNPAR; 571 t.c_oflag = 0; 572 t.c_lflag = 0; 573 t.c_cc[VERASE] = 574 t.c_cc[VKILL] = 0; 575 t.c_cc[VMIN] = 1; 576 t.c_cc[VTIME] = 0; 577 578 if (set_term_param (&t) < 0) 579 fatal(2, "Can't set terminal parameters: %m"); 580 #endif 581 } 582 583 void break_sequence() 584 { 585 #ifdef TERMIOS 586 tcsendbreak (0, 0); 587 #endif 588 } 589 590 void terminate(status) 591 int status; 592 { 593 echo_stderr(-1); 594 if (report_file != (char *) 0 && report_fp != (FILE *) NULL) { 595 /* 596 * Allow the last of the report string to be gathered before we terminate. 597 */ 598 if (report_gathering) { 599 int c, rep_len; 600 601 rep_len = strlen(report_buffer); 602 while (rep_len + 1 <= sizeof(report_buffer)) { 603 alarm(1); 604 c = get_char(); 605 alarm(0); 606 if (c < 0 || iscntrl(c)) 607 break; 608 report_buffer[rep_len] = c; 609 ++rep_len; 610 } 611 report_buffer[rep_len] = 0; 612 fprintf (report_fp, "chat: %s\n", report_buffer); 613 } 614 if (verbose) 615 fprintf (report_fp, "Closing \"%s\".\n", report_file); 616 fclose (report_fp); 617 report_fp = (FILE *) NULL; 618 } 619 620 #if defined(get_term_param) 621 if (have_tty_parameters) { 622 if (set_term_param (&saved_tty_parameters) < 0) 623 fatal(2, "Can't restore terminal parameters: %m"); 624 } 625 #endif 626 627 exit(status); 628 } 629 630 /* 631 * 'Clean up' this string. 632 */ 633 char *clean(s, sending) 634 register char *s; 635 int sending; /* set to 1 when sending (putting) this string. */ 636 { 637 char *ret, *t, cur_chr; 638 int new_length; 639 register char *s1, *phchar; 640 int add_return = sending; 641 #define isoctal(chr) (((chr) >= '0') && ((chr) <= '7')) 642 643 /* Overestimate new length: */ 644 new_length = 0; 645 for (t = s; *t; t++) 646 if (*t == '^' && *(t+1) != '\0') { 647 t++; 648 new_length++; 649 } else if (*t != '\\') { 650 new_length++; 651 } else { 652 t++; 653 switch (*t) { 654 case 'c': 655 case 'b': 656 case 'r': 657 case 'n': 658 case 's': 659 case 't': 660 new_length++; 661 break; 662 case 'K': 663 case 'p': 664 case 'd': 665 case '\0': 666 case '\\': 667 case 'N': 668 new_length += 2; 669 break; 670 case 'T': 671 new_length += sending && phone_num ? strlen(phone_num) : 2; 672 break; 673 case 'U': 674 new_length += sending && phone_num2 ? strlen(phone_num2) : 2; 675 break; 676 default: 677 if (isoctal(*t)) { 678 t++; 679 if (isoctal(*t)) { 680 t++; 681 if (isoctal(*t)) 682 t++; 683 } 684 } 685 t--; 686 new_length += 2; /* Could become \\ */ 687 } 688 if (*t == '\0') 689 break; 690 } 691 692 new_length += 3; /* \r and two nuls */ 693 694 ret = (char *)malloc(new_length); 695 696 s1 = ret; 697 while (*s) { 698 cur_chr = *s++; 699 if (cur_chr == '^') { 700 cur_chr = *s++; 701 if (cur_chr == '\0') { 702 *s1++ = '^'; 703 break; 704 } 705 cur_chr &= 0x1F; 706 if (cur_chr != 0) { 707 *s1++ = cur_chr; 708 } 709 continue; 710 } 711 712 if (cur_chr != '\\') { 713 *s1++ = cur_chr; 714 continue; 715 } 716 717 cur_chr = *s++; 718 if (cur_chr == '\0') { 719 if (sending) { 720 *s1++ = '\\'; 721 *s1++ = '\\'; 722 } 723 break; 724 } 725 726 switch (cur_chr) { 727 case 'b': 728 *s1++ = '\b'; 729 break; 730 731 case 'c': 732 if (sending && *s == '\0') 733 add_return = 0; 734 else 735 *s1++ = cur_chr; 736 break; 737 738 case '\\': 739 case 'K': 740 case 'p': 741 case 'd': 742 if (sending) 743 *s1++ = '\\'; 744 745 *s1++ = cur_chr; 746 break; 747 748 case 'T': 749 if (sending && phone_num) { 750 for ( phchar = phone_num; *phchar != '\0'; phchar++) 751 *s1++ = *phchar; 752 } 753 else { 754 *s1++ = '\\'; 755 *s1++ = 'T'; 756 } 757 break; 758 759 case 'U': 760 if (sending && phone_num2) { 761 for ( phchar = phone_num2; *phchar != '\0'; phchar++) 762 *s1++ = *phchar; 763 } 764 else { 765 *s1++ = '\\'; 766 *s1++ = 'U'; 767 } 768 break; 769 770 case 'q': 771 quiet = 1; 772 break; 773 774 case 'r': 775 *s1++ = '\r'; 776 break; 777 778 case 'n': 779 *s1++ = '\n'; 780 break; 781 782 case 's': 783 *s1++ = ' '; 784 break; 785 786 case 't': 787 *s1++ = '\t'; 788 break; 789 790 case 'N': 791 if (sending) { 792 *s1++ = '\\'; 793 *s1++ = '\0'; 794 } 795 else 796 *s1++ = 'N'; 797 break; 798 799 default: 800 if (isoctal (cur_chr)) { 801 cur_chr &= 0x07; 802 if (isoctal (*s)) { 803 cur_chr <<= 3; 804 cur_chr |= *s++ - '0'; 805 if (isoctal (*s)) { 806 cur_chr <<= 3; 807 cur_chr |= *s++ - '0'; 808 } 809 } 810 811 if (cur_chr != 0 || sending) { 812 if (sending && (cur_chr == '\\' || cur_chr == 0)) 813 *s1++ = '\\'; 814 *s1++ = cur_chr; 815 } 816 break; 817 } 818 819 if (sending) 820 *s1++ = '\\'; 821 *s1++ = cur_chr; 822 break; 823 } 824 } 825 826 if (add_return) 827 *s1++ = '\r'; 828 829 *s1++ = '\0'; /* guarantee closure */ 830 *s1++ = '\0'; /* terminate the string */ 831 832 #ifdef DEBUG 833 fprintf(stderr, "clean(): guessed %d and used %d\n", new_length, s1-ret); 834 #endif 835 if (new_length < s1 - ret) 836 logf("clean(): new_length too short! %d < %d: \"%s\" -> \"%s\"", 837 new_length, s1 - ret, s, ret); 838 839 return ret; 840 } 841 842 /* 843 * A modified version of 'strtok'. This version skips \ sequences. 844 */ 845 846 char *expect_strtok (s, term) 847 char *s, *term; 848 { 849 static char *str = ""; 850 int escape_flag = 0; 851 char *result; 852 853 /* 854 * If a string was specified then do initial processing. 855 */ 856 if (s) 857 str = s; 858 859 /* 860 * If this is the escape flag then reset it and ignore the character. 861 */ 862 if (*str) 863 result = str; 864 else 865 result = (char *) 0; 866 867 while (*str) { 868 if (escape_flag) { 869 escape_flag = 0; 870 ++str; 871 continue; 872 } 873 874 if (*str == '\\') { 875 ++str; 876 escape_flag = 1; 877 continue; 878 } 879 880 /* 881 * If this is not in the termination string, continue. 882 */ 883 if (strchr (term, *str) == (char *) 0) { 884 ++str; 885 continue; 886 } 887 888 /* 889 * This is the terminator. Mark the end of the string and stop. 890 */ 891 *str++ = '\0'; 892 break; 893 } 894 return (result); 895 } 896 897 /* 898 * Process the expect string 899 */ 900 901 void chat_expect (s) 902 char *s; 903 { 904 char *expect; 905 char *reply; 906 907 if (strcmp(s, "HANGUP") == 0) { 908 ++hup_next; 909 return; 910 } 911 912 if (strcmp(s, "ABORT") == 0) { 913 ++abort_next; 914 return; 915 } 916 917 if (strcmp(s, "CLR_ABORT") == 0) { 918 ++clear_abort_next; 919 return; 920 } 921 922 if (strcmp(s, "REPORT") == 0) { 923 ++report_next; 924 return; 925 } 926 927 if (strcmp(s, "CLR_REPORT") == 0) { 928 ++clear_report_next; 929 return; 930 } 931 932 if (strcmp(s, "TIMEOUT") == 0) { 933 ++timeout_next; 934 return; 935 } 936 937 if (strcmp(s, "ECHO") == 0) { 938 ++echo_next; 939 return; 940 } 941 942 if (strcmp(s, "SAY") == 0) { 943 ++say_next; 944 return; 945 } 946 947 /* 948 * Fetch the expect and reply string. 949 */ 950 for (;;) { 951 expect = expect_strtok (s, "-"); 952 s = (char *) 0; 953 954 if (expect == (char *) 0) 955 return; 956 957 reply = expect_strtok (s, "-"); 958 959 /* 960 * Handle the expect string. If successful then exit. 961 */ 962 if (get_string (expect)) 963 return; 964 965 /* 966 * If there is a sub-reply string then send it. Otherwise any condition 967 * is terminal. 968 */ 969 if (reply == (char *) 0 || exit_code != 3) 970 break; 971 972 chat_send (reply); 973 } 974 975 /* 976 * The expectation did not occur. This is terminal. 977 */ 978 if (fail_reason) 979 logf("Failed (%s)", fail_reason); 980 else 981 logf("Failed"); 982 terminate(exit_code); 983 } 984 985 /* 986 * Translate the input character to the appropriate string for printing 987 * the data. 988 */ 989 990 char *character(c) 991 int c; 992 { 993 static char string[10]; 994 char *meta; 995 996 meta = (c & 0x80) ? "M-" : ""; 997 c &= 0x7F; 998 999 if (c < 32) 1000 sprintf(string, "%s^%c", meta, (int)c + '@'); 1001 else if (c == 127) 1002 sprintf(string, "%s^?", meta); 1003 else 1004 sprintf(string, "%s%c", meta, c); 1005 1006 return (string); 1007 } 1008 1009 /* 1010 * process the reply string 1011 */ 1012 void chat_send (s) 1013 register char *s; 1014 { 1015 if (say_next) { 1016 say_next = 0; 1017 s = clean(s,0); 1018 write(2, s, strlen(s)); 1019 free(s); 1020 return; 1021 } 1022 1023 if (hup_next) { 1024 hup_next = 0; 1025 if (strcmp(s, "OFF") == 0) 1026 signal(SIGHUP, SIG_IGN); 1027 else 1028 signal(SIGHUP, sighup); 1029 return; 1030 } 1031 1032 if (echo_next) { 1033 echo_next = 0; 1034 echo = (strcmp(s, "ON") == 0); 1035 return; 1036 } 1037 1038 if (abort_next) { 1039 char *s1; 1040 1041 abort_next = 0; 1042 1043 if (n_aborts >= MAX_ABORTS) 1044 fatal(2, "Too many ABORT strings"); 1045 1046 s1 = clean(s, 0); 1047 1048 if (strlen(s1) > strlen(s) 1049 || strlen(s1) + 1 > sizeof(fail_buffer)) 1050 fatal(1, "Illegal or too-long ABORT string ('%v')", s); 1051 1052 abort_string[n_aborts++] = s1; 1053 1054 if (verbose) 1055 logf("abort on (%v)", s); 1056 return; 1057 } 1058 1059 if (clear_abort_next) { 1060 char *s1; 1061 int i; 1062 int old_max; 1063 int pack = 0; 1064 1065 clear_abort_next = 0; 1066 1067 s1 = clean(s, 0); 1068 1069 if (strlen(s1) > strlen(s) 1070 || strlen(s1) + 1 > sizeof(fail_buffer)) 1071 fatal(1, "Illegal or too-long CLR_ABORT string ('%v')", s); 1072 1073 old_max = n_aborts; 1074 for (i=0; i < n_aborts; i++) { 1075 if ( strcmp(s1,abort_string[i]) == 0 ) { 1076 free(abort_string[i]); 1077 abort_string[i] = NULL; 1078 pack++; 1079 n_aborts--; 1080 if (verbose) 1081 logf("clear abort on (%v)", s); 1082 } 1083 } 1084 free(s1); 1085 if (pack) 1086 pack_array(abort_string,old_max); 1087 return; 1088 } 1089 1090 if (report_next) { 1091 char *s1; 1092 1093 report_next = 0; 1094 if (n_reports >= MAX_REPORTS) 1095 fatal(2, "Too many REPORT strings"); 1096 1097 s1 = clean(s, 0); 1098 1099 if (strlen(s1) > strlen(s) || strlen(s1) > sizeof fail_buffer - 1) 1100 fatal(1, "Illegal or too-long REPORT string ('%v')", s); 1101 1102 report_string[n_reports++] = s1; 1103 1104 if (verbose) 1105 logf("report (%v)", s); 1106 return; 1107 } 1108 1109 if (clear_report_next) { 1110 char *s1; 1111 int i; 1112 int old_max; 1113 int pack = 0; 1114 1115 clear_report_next = 0; 1116 1117 s1 = clean(s, 0); 1118 1119 if (strlen(s1) > strlen(s) || strlen(s1) > sizeof fail_buffer - 1) 1120 fatal(1, "Illegal or too-long REPORT string ('%v')", s); 1121 1122 old_max = n_reports; 1123 for (i=0; i < n_reports; i++) { 1124 if ( strcmp(s1,report_string[i]) == 0 ) { 1125 free(report_string[i]); 1126 report_string[i] = NULL; 1127 pack++; 1128 n_reports--; 1129 if (verbose) 1130 logf("clear report (%v)", s); 1131 } 1132 } 1133 free(s1); 1134 if (pack) 1135 pack_array(report_string,old_max); 1136 1137 return; 1138 } 1139 1140 if (timeout_next) { 1141 timeout_next = 0; 1142 timeout = atoi(s); 1143 1144 if (timeout <= 0) 1145 timeout = DEFAULT_CHAT_TIMEOUT; 1146 1147 if (verbose) 1148 logf("timeout set to %d seconds", timeout); 1149 1150 return; 1151 } 1152 1153 if (strcmp(s, "EOT") == 0) 1154 s = "^D\\c"; 1155 else if (strcmp(s, "BREAK") == 0) 1156 s = "\\K\\c"; 1157 1158 if (!put_string(s)) 1159 fatal(1, "Failed"); 1160 } 1161 1162 int get_char() 1163 { 1164 int status; 1165 char c; 1166 1167 status = read(0, &c, 1); 1168 1169 switch (status) { 1170 case 1: 1171 return ((int)c & 0x7F); 1172 1173 default: 1174 logf("warning: read() on stdin returned %d", status); 1175 1176 case -1: 1177 if ((status = fcntl(0, F_GETFL, 0)) == -1) 1178 fatal(2, "Can't get file mode flags on stdin: %m"); 1179 1180 if (fcntl(0, F_SETFL, status & ~O_NONBLOCK) == -1) 1181 fatal(2, "Can't set file mode flags on stdin: %m"); 1182 1183 return (-1); 1184 } 1185 } 1186 1187 int put_char(c) 1188 int c; 1189 { 1190 int status; 1191 char ch = c; 1192 1193 usleep(10000); /* inter-character typing delay (?) */ 1194 1195 status = write(1, &ch, 1); 1196 1197 switch (status) { 1198 case 1: 1199 return (0); 1200 1201 default: 1202 logf("warning: write() on stdout returned %d", status); 1203 1204 case -1: 1205 if ((status = fcntl(0, F_GETFL, 0)) == -1) 1206 fatal(2, "Can't get file mode flags on stdin, %m"); 1207 1208 if (fcntl(0, F_SETFL, status & ~O_NONBLOCK) == -1) 1209 fatal(2, "Can't set file mode flags on stdin: %m"); 1210 1211 return (-1); 1212 } 1213 } 1214 1215 int write_char (c) 1216 int c; 1217 { 1218 if (alarmed || put_char(c) < 0) { 1219 alarm(0); 1220 alarmed = 0; 1221 1222 if (verbose) { 1223 if (errno == EINTR || errno == EWOULDBLOCK) 1224 logf(" -- write timed out"); 1225 else 1226 logf(" -- write failed: %m"); 1227 } 1228 return (0); 1229 } 1230 return (1); 1231 } 1232 1233 int put_string (s) 1234 register char *s; 1235 { 1236 quiet = 0; 1237 s = clean(s, 1); 1238 1239 if (verbose) { 1240 if (quiet) 1241 logf("send (??????)"); 1242 else 1243 logf("send (%v)", s); 1244 } 1245 1246 alarm(timeout); alarmed = 0; 1247 1248 while (*s) { 1249 register char c = *s++; 1250 1251 if (c != '\\') { 1252 if (!write_char (c)) 1253 return 0; 1254 continue; 1255 } 1256 1257 c = *s++; 1258 switch (c) { 1259 case 'd': 1260 sleep(1); 1261 break; 1262 1263 case 'K': 1264 break_sequence(); 1265 break; 1266 1267 case 'p': 1268 usleep(10000); /* 1/100th of a second (arg is microseconds) */ 1269 break; 1270 1271 default: 1272 if (!write_char (c)) 1273 return 0; 1274 break; 1275 } 1276 } 1277 1278 alarm(0); 1279 alarmed = 0; 1280 return (1); 1281 } 1282 1283 /* 1284 * Echo a character to stderr. 1285 * When called with -1, a '\n' character is generated when 1286 * the cursor is not at the beginning of a line. 1287 */ 1288 void echo_stderr(n) 1289 int n; 1290 { 1291 static int need_lf; 1292 char *s; 1293 1294 switch (n) { 1295 case '\r': /* ignore '\r' */ 1296 break; 1297 case -1: 1298 if (need_lf == 0) 1299 break; 1300 /* fall through */ 1301 case '\n': 1302 write(2, "\n", 1); 1303 need_lf = 0; 1304 break; 1305 default: 1306 s = character(n); 1307 write(2, s, strlen(s)); 1308 need_lf = 1; 1309 break; 1310 } 1311 } 1312 1313 /* 1314 * 'Wait for' this string to appear on this file descriptor. 1315 */ 1316 int get_string(string) 1317 register char *string; 1318 { 1319 char temp[STR_LEN]; 1320 int c, printed = 0, len, minlen; 1321 register char *s = temp, *end = s + STR_LEN; 1322 char *logged = temp; 1323 1324 fail_reason = (char *)0; 1325 string = clean(string, 0); 1326 len = strlen(string); 1327 minlen = (len > sizeof(fail_buffer)? len: sizeof(fail_buffer)) - 1; 1328 1329 if (verbose) 1330 logf("expect (%v)", string); 1331 1332 if (len > STR_LEN) { 1333 logf("expect string is too long"); 1334 exit_code = 1; 1335 return 0; 1336 } 1337 1338 if (len == 0) { 1339 if (verbose) 1340 logf("got it"); 1341 return (1); 1342 } 1343 1344 alarm(timeout); 1345 alarmed = 0; 1346 1347 while ( ! alarmed && (c = get_char()) >= 0) { 1348 int n, abort_len, report_len; 1349 1350 if (echo) 1351 echo_stderr(c); 1352 if (verbose && c == '\n') { 1353 if (s == logged) 1354 logf(""); /* blank line */ 1355 else 1356 logf("%0.*v", s - logged, logged); 1357 logged = s + 1; 1358 } 1359 1360 *s++ = c; 1361 1362 if (verbose && s >= logged + 80) { 1363 logf("%0.*v", s - logged, logged); 1364 logged = s; 1365 } 1366 1367 if (Verbose) { 1368 if (c == '\n') 1369 fputc( '\n', stderr ); 1370 else if (c != '\r') 1371 fprintf( stderr, "%s", character(c) ); 1372 } 1373 1374 if (!report_gathering) { 1375 for (n = 0; n < n_reports; ++n) { 1376 if ((report_string[n] != (char*) NULL) && 1377 s - temp >= (report_len = strlen(report_string[n])) && 1378 strncmp(s - report_len, report_string[n], report_len) == 0) { 1379 time_t time_now = time ((time_t*) NULL); 1380 struct tm* tm_now = localtime (&time_now); 1381 1382 strftime (report_buffer, 20, "%b %d %H:%M:%S ", tm_now); 1383 strcat (report_buffer, report_string[n]); 1384 1385 report_string[n] = (char *) NULL; 1386 report_gathering = 1; 1387 break; 1388 } 1389 } 1390 } 1391 else { 1392 if (!iscntrl (c)) { 1393 int rep_len = strlen (report_buffer); 1394 report_buffer[rep_len] = c; 1395 report_buffer[rep_len + 1] = '\0'; 1396 } 1397 else { 1398 report_gathering = 0; 1399 fprintf (report_fp, "chat: %s\n", report_buffer); 1400 } 1401 } 1402 1403 if (s - temp >= len && 1404 c == string[len - 1] && 1405 strncmp(s - len, string, len) == 0) { 1406 if (verbose) { 1407 if (s > logged) 1408 logf("%0.*v", s - logged, logged); 1409 logf(" -- got it\n"); 1410 } 1411 1412 alarm(0); 1413 alarmed = 0; 1414 return (1); 1415 } 1416 1417 for (n = 0; n < n_aborts; ++n) { 1418 if (s - temp >= (abort_len = strlen(abort_string[n])) && 1419 strncmp(s - abort_len, abort_string[n], abort_len) == 0) { 1420 if (verbose) { 1421 if (s > logged) 1422 logf("%0.*v", s - logged, logged); 1423 logf(" -- failed"); 1424 } 1425 1426 alarm(0); 1427 alarmed = 0; 1428 exit_code = n + 4; 1429 strcpy(fail_reason = fail_buffer, abort_string[n]); 1430 return (0); 1431 } 1432 } 1433 1434 if (s >= end) { 1435 if (logged < s - minlen) { 1436 logf("%0.*v", s - logged, logged); 1437 logged = s; 1438 } 1439 s -= minlen; 1440 memmove(temp, s, minlen); 1441 logged = temp + (logged - s); 1442 s = temp + minlen; 1443 } 1444 1445 if (alarmed && verbose) 1446 logf("warning: alarm synchronization problem"); 1447 } 1448 1449 alarm(0); 1450 1451 if (verbose && printed) { 1452 if (alarmed) 1453 logf(" -- read timed out"); 1454 else 1455 logf(" -- read failed: %m"); 1456 } 1457 1458 exit_code = 3; 1459 alarmed = 0; 1460 return (0); 1461 } 1462 1463 /* 1464 * Gross kludge to handle Solaris versions >= 2.6 having usleep. 1465 */ 1466 #ifdef SOL2 1467 #include <sys/param.h> 1468 #if MAXUID > 65536 /* then this is Solaris 2.6 or later */ 1469 #undef NO_USLEEP 1470 #endif 1471 #endif /* SOL2 */ 1472 1473 #ifdef NO_USLEEP 1474 #include <sys/types.h> 1475 #include <sys/time.h> 1476 1477 /* 1478 usleep -- support routine for 4.2BSD system call emulations 1479 last edit: 29-Oct-1984 D A Gwyn 1480 */ 1481 1482 extern int select(); 1483 1484 int 1485 usleep( usec ) /* returns 0 if ok, else -1 */ 1486 long usec; /* delay in microseconds */ 1487 { 1488 static struct { /* `timeval' */ 1489 long tv_sec; /* seconds */ 1490 long tv_usec; /* microsecs */ 1491 } delay; /* _select() timeout */ 1492 1493 delay.tv_sec = usec / 1000000L; 1494 delay.tv_usec = usec % 1000000L; 1495 1496 return select(0, (long *)0, (long *)0, (long *)0, &delay); 1497 } 1498 #endif 1499 1500 void 1501 pack_array (array, end) 1502 char **array; /* The address of the array of string pointers */ 1503 int end; /* The index of the next free entry before CLR_ */ 1504 { 1505 int i, j; 1506 1507 for (i = 0; i < end; i++) { 1508 if (array[i] == NULL) { 1509 for (j = i+1; j < end; ++j) 1510 if (array[j] != NULL) 1511 array[i++] = array[j]; 1512 for (; i < end; ++i) 1513 array[i] = NULL; 1514 break; 1515 } 1516 } 1517 } 1518 1519 /* 1520 * vfmtmsg - format a message into a buffer. Like vsprintf except we 1521 * also specify the length of the output buffer, and we handle the 1522 * %m (error message) format. 1523 * Doesn't do floating-point formats. 1524 * Returns the number of chars put into buf. 1525 */ 1526 #define OUTCHAR(c) (buflen > 0? (--buflen, *buf++ = (c)): 0) 1527 1528 int 1529 vfmtmsg(buf, buflen, fmt, args) 1530 char *buf; 1531 int buflen; 1532 const char *fmt; 1533 va_list args; 1534 { 1535 int c, i, n; 1536 int width, prec, fillch; 1537 int base, len, neg, quoted; 1538 unsigned long val = 0; 1539 char *str, *buf0; 1540 const char *f; 1541 unsigned char *p; 1542 char num[32]; 1543 static char hexchars[] = "0123456789abcdef"; 1544 1545 buf0 = buf; 1546 --buflen; 1547 while (buflen > 0) { 1548 for (f = fmt; *f != '%' && *f != 0; ++f) 1549 ; 1550 if (f > fmt) { 1551 len = f - fmt; 1552 if (len > buflen) 1553 len = buflen; 1554 memcpy(buf, fmt, len); 1555 buf += len; 1556 buflen -= len; 1557 fmt = f; 1558 } 1559 if (*fmt == 0) 1560 break; 1561 c = *++fmt; 1562 width = prec = 0; 1563 fillch = ' '; 1564 if (c == '0') { 1565 fillch = '0'; 1566 c = *++fmt; 1567 } 1568 if (c == '*') { 1569 width = va_arg(args, int); 1570 c = *++fmt; 1571 } else { 1572 while (isdigit(c)) { 1573 width = width * 10 + c - '0'; 1574 c = *++fmt; 1575 } 1576 } 1577 if (c == '.') { 1578 c = *++fmt; 1579 if (c == '*') { 1580 prec = va_arg(args, int); 1581 c = *++fmt; 1582 } else { 1583 while (isdigit(c)) { 1584 prec = prec * 10 + c - '0'; 1585 c = *++fmt; 1586 } 1587 } 1588 } 1589 str = 0; 1590 base = 0; 1591 neg = 0; 1592 ++fmt; 1593 switch (c) { 1594 case 'd': 1595 i = va_arg(args, int); 1596 if (i < 0) { 1597 neg = 1; 1598 val = -i; 1599 } else 1600 val = i; 1601 base = 10; 1602 break; 1603 case 'o': 1604 val = va_arg(args, unsigned int); 1605 base = 8; 1606 break; 1607 case 'x': 1608 val = va_arg(args, unsigned int); 1609 base = 16; 1610 break; 1611 case 'p': 1612 val = (unsigned long) va_arg(args, void *); 1613 base = 16; 1614 neg = 2; 1615 break; 1616 case 's': 1617 str = va_arg(args, char *); 1618 break; 1619 case 'c': 1620 num[0] = va_arg(args, int); 1621 num[1] = 0; 1622 str = num; 1623 break; 1624 case 'm': 1625 str = strerror(errno); 1626 break; 1627 case 'v': /* "visible" string */ 1628 case 'q': /* quoted string */ 1629 quoted = c == 'q'; 1630 p = va_arg(args, unsigned char *); 1631 if (fillch == '0' && prec > 0) { 1632 n = prec; 1633 } else { 1634 n = strlen((char *)p); 1635 if (prec > 0 && prec < n) 1636 n = prec; 1637 } 1638 while (n > 0 && buflen > 0) { 1639 c = *p++; 1640 --n; 1641 if (!quoted && c >= 0x80) { 1642 OUTCHAR('M'); 1643 OUTCHAR('-'); 1644 c -= 0x80; 1645 } 1646 if (quoted && (c == '"' || c == '\\')) 1647 OUTCHAR('\\'); 1648 if (c < 0x20 || (0x7f <= c && c < 0xa0)) { 1649 if (quoted) { 1650 OUTCHAR('\\'); 1651 switch (c) { 1652 case '\t': OUTCHAR('t'); break; 1653 case '\n': OUTCHAR('n'); break; 1654 case '\b': OUTCHAR('b'); break; 1655 case '\f': OUTCHAR('f'); break; 1656 default: 1657 OUTCHAR('x'); 1658 OUTCHAR(hexchars[c >> 4]); 1659 OUTCHAR(hexchars[c & 0xf]); 1660 } 1661 } else { 1662 if (c == '\t') 1663 OUTCHAR(c); 1664 else { 1665 OUTCHAR('^'); 1666 OUTCHAR(c ^ 0x40); 1667 } 1668 } 1669 } else 1670 OUTCHAR(c); 1671 } 1672 continue; 1673 default: 1674 *buf++ = '%'; 1675 if (c != '%') 1676 --fmt; /* so %z outputs %z etc. */ 1677 --buflen; 1678 continue; 1679 } 1680 if (base != 0) { 1681 str = num + sizeof(num); 1682 *--str = 0; 1683 while (str > num + neg) { 1684 *--str = hexchars[val % base]; 1685 val = val / base; 1686 if (--prec <= 0 && val == 0) 1687 break; 1688 } 1689 switch (neg) { 1690 case 1: 1691 *--str = '-'; 1692 break; 1693 case 2: 1694 *--str = 'x'; 1695 *--str = '0'; 1696 break; 1697 } 1698 len = num + sizeof(num) - 1 - str; 1699 } else { 1700 len = strlen(str); 1701 if (prec > 0 && len > prec) 1702 len = prec; 1703 } 1704 if (width > 0) { 1705 if (width > buflen) 1706 width = buflen; 1707 if ((n = width - len) > 0) { 1708 buflen -= n; 1709 for (; n > 0; --n) 1710 *buf++ = fillch; 1711 } 1712 } 1713 if (len > buflen) 1714 len = buflen; 1715 memcpy(buf, str, len); 1716 buf += len; 1717 buflen -= len; 1718 } 1719 *buf = 0; 1720 return buf - buf0; 1721 } 1722