1 /* 2 * Copyright 2000 Sun Microsystems, Inc. All rights reserved. 3 * Use is subject to license terms. 4 */ 5 /* 6 * Chat -- a program for automatic session establishment (i.e. dial 7 * the phone and log in). 8 * 9 * Standard termination codes: 10 * 0 - successful completion of the script 11 * 1 - invalid argument, expect string too large, etc. 12 * 2 - error on an I/O operation or fatal error condition. 13 * 3 - timeout waiting for a simple string. 14 * 4 - the first string declared as "ABORT" 15 * 5 - the second string declared as "ABORT" 16 * 6 - ... and so on for successive ABORT strings. 17 * 18 * This software is in the public domain. 19 * 20 * ----------------- 21 * 22-May-99 added environment substitutuion, enabled with -E switch. 22 * Andreas Arens <andras@cityweb.de>. 23 * 24 * 12-May-99 added a feature to read data to be sent from a file, 25 * if the send string starts with @. Idea from gpk <gpk@onramp.net>. 26 * 27 * added -T and -U option and \T and \U substitution to pass a phone 28 * number into chat script. Two are needed for some ISDN TA applications. 29 * Keith Dart <kdart@cisco.com> 30 * 31 * 32 * Added SAY keyword to send output to stderr. 33 * This allows to turn ECHO OFF and to output specific, user selected, 34 * text to give progress messages. This best works when stderr 35 * exists (i.e.: pppd in nodetach mode). 36 * 37 * Added HANGUP directives to allow for us to be called 38 * back. When HANGUP is set to NO, chat will not hangup at HUP signal. 39 * We rely on timeouts in that case. 40 * 41 * Added CLR_ABORT to clear previously set ABORT string. This has been 42 * dictated by the HANGUP above as "NO CARRIER" (for example) must be 43 * an ABORT condition until we know the other host is going to close 44 * the connection for call back. As soon as we have completed the 45 * first stage of the call back sequence, "NO CARRIER" is a valid, non 46 * fatal string. As soon as we got called back (probably get "CONNECT"), 47 * we should re-arm the ABORT "NO CARRIER". Hence the CLR_ABORT command. 48 * Note that CLR_ABORT packs the abort_strings[] array so that we do not 49 * have unused entries not being reclaimed. 50 * 51 * In the same vein as above, added CLR_REPORT keyword. 52 * 53 * Allow for comments. Line starting with '#' are comments and are 54 * ignored. If a '#' is to be expected as the first character, the 55 * expect string must be quoted. 56 * 57 * 58 * Francis Demierre <Francis@SwissMail.Com> 59 * Thu May 15 17:15:40 MET DST 1997 60 * 61 * 62 * Added -r "report file" switch & REPORT keyword. 63 * Robert Geer <bgeer@xmission.com> 64 * 65 * Added -s "use stderr" and -S "don't use syslog" switches. 66 * June 18, 1997 67 * Karl O. Pinc <kop@meme.com> 68 * 69 * 70 * Added -e "echo" switch & ECHO keyword 71 * Dick Streefland <dicks@tasking.nl> 72 * 73 * 74 * Considerable updates and modifications by 75 * Al Longyear <longyear@pobox.com> 76 * Paul Mackerras <paulus@cs.anu.edu.au> 77 * 78 * 79 * The original author is: 80 * 81 * Karl Fox <karl@MorningStar.Com> 82 * Morning Star Technologies, Inc. 83 * 1760 Zollinger Road 84 * Columbus, OH 43221 85 * (614)451-1883 86 * 87 */ 88 89 #ifndef __STDC__ 90 #define const 91 #endif 92 93 #include <stdio.h> 94 #include <ctype.h> 95 #include <time.h> 96 #include <fcntl.h> 97 #include <signal.h> 98 #include <errno.h> 99 #include <string.h> 100 #include <stdlib.h> 101 #include <unistd.h> 102 #include <sys/types.h> 103 #include <sys/stat.h> 104 #include <syslog.h> 105 106 #ifndef TERMIO 107 #undef TERMIOS 108 #define TERMIOS 109 #endif 110 111 #ifdef TERMIO 112 #include <termio.h> 113 #endif 114 #ifdef TERMIOS 115 #include <termios.h> 116 #endif 117 118 #define STR_LEN 1024 119 120 #ifndef SIGTYPE 121 #define SIGTYPE void 122 #endif 123 124 #undef __P 125 #undef __V 126 127 #ifdef __STDC__ 128 #include <stdarg.h> 129 #define __V(x) x 130 #define __P(x) x 131 #else 132 #include <varargs.h> 133 #define __V(x) (va_alist) va_dcl 134 #define __P(x) () 135 #define const 136 #endif 137 138 #ifndef O_NONBLOCK 139 #define O_NONBLOCK O_NDELAY 140 #endif 141 142 #ifdef SUNOS 143 extern int sys_nerr; 144 extern char *sys_errlist[]; 145 #define memmove(to, from, n) bcopy(from, to, n) 146 #define strerror(n) ((unsigned)(n) < sys_nerr? sys_errlist[(n)] :\ 147 "unknown error") 148 #endif 149 150 /*************** Micro getopt() *********************************************/ 151 #define OPTION(c,v) (_O&2&&**v?*(*v)++:!c||_O&4?0:(!(_O&1)&& \ 152 (--c,++v),_O=4,c&&**v=='-'&&v[0][1]?*++*v=='-'\ 153 &&!v[0][1]?(--c,++v,0):(_O=2,*(*v)++):0)) 154 #define OPTARG(c,v) (_O&2?**v||(++v,--c)?(_O=1,--c,*v++): \ 155 (_O=4,(char*)0):(char*)0) 156 #define OPTONLYARG(c,v) (_O&2&&**v?(_O=1,--c,*v++):(char*)0) 157 #define ARG(c,v) (c?(--c,*v++):(char*)0) 158 159 static int _O = 0; /* Internal state */ 160 /*************** Micro getopt() *********************************************/ 161 162 char *program_name; 163 164 #define MAX_ABORTS 50 165 #define MAX_REPORTS 50 166 #define DEFAULT_CHAT_TIMEOUT 45 167 168 int echo = 0; 169 int verbose = 0; 170 int to_log = 1; 171 int to_stderr = 0; 172 int Verbose = 0; 173 int quiet = 0; 174 int report = 0; 175 int use_env = 0; 176 int exit_code = 0; 177 FILE* report_fp = (FILE *) 0; 178 char *report_file = (char *) 0; 179 char *chat_file = (char *) 0; 180 char *phone_num = (char *) 0; 181 char *phone_num2 = (char *) 0; 182 int timeout = DEFAULT_CHAT_TIMEOUT; 183 184 int have_tty_parameters = 0; 185 186 #ifdef TERMIO 187 #define term_parms struct termio 188 #define get_term_param(param) ioctl(0, TCGETA, param) 189 #define set_term_param(param) ioctl(0, TCSETA, param) 190 struct termio saved_tty_parameters; 191 #endif 192 193 #ifdef TERMIOS 194 #define term_parms struct termios 195 #define get_term_param(param) tcgetattr(0, param) 196 #define set_term_param(param) tcsetattr(0, TCSANOW, param) 197 struct termios saved_tty_parameters; 198 #endif 199 200 char *abort_string[MAX_ABORTS], *fail_reason = (char *)0, 201 fail_buffer[50]; 202 int n_aborts = 0, abort_next = 0, timeout_next = 0, echo_next = 0; 203 int clear_abort_next = 0; 204 205 char *report_string[MAX_REPORTS] ; 206 char report_buffer[50] ; 207 int n_reports = 0, report_next = 0, report_gathering = 0 ; 208 int clear_report_next = 0; 209 210 int say_next = 0, hup_next = 0; 211 212 void *dup_mem __P((void *b, size_t c)); 213 void *copy_of __P((char *s)); 214 void usage __P((void)); 215 void logf __P((const char *fmt, ...)); 216 void fatal __P((int code, const char *fmt, ...)); 217 SIGTYPE sigalrm __P((int signo)); 218 SIGTYPE sigint __P((int signo)); 219 SIGTYPE sigterm __P((int signo)); 220 SIGTYPE sighup __P((int signo)); 221 void unalarm __P((void)); 222 void init __P((void)); 223 void set_tty_parameters __P((void)); 224 void echo_stderr __P((int)); 225 void break_sequence __P((void)); 226 void terminate __P((int status)); 227 void do_file __P((char *chat_file)); 228 int get_string __P((register char *string)); 229 int put_string __P((register char *s)); 230 int write_char __P((int c)); 231 int put_char __P((int c)); 232 int get_char __P((void)); 233 void chat_send __P((register char *s)); 234 char *character __P((int c)); 235 void chat_expect __P((register char *s)); 236 char *clean __P((register char *s, int sending)); 237 void break_sequence __P((void)); 238 void terminate __P((int status)); 239 void pack_array __P((char **array, int end)); 240 char *expect_strtok __P((char *, char *)); 241 int vfmtmsg __P((char *, int, const char *, va_list)); /* vsprintf++ */ 242 243 int main __P((int, char *[])); 244 245 void *dup_mem(b, c) 246 void *b; 247 size_t c; 248 { 249 void *ans = malloc (c); 250 if (!ans) 251 fatal(2, "memory error!"); 252 253 memcpy (ans, b, c); 254 return ans; 255 } 256 257 void *copy_of (s) 258 char *s; 259 { 260 return dup_mem (s, strlen (s) + 1); 261 } 262 263 /* 264 * chat [ -v ] [ -E ] [ -T number ] [ -U number ] [ -t timeout ] [ -f chat-file ] \ 265 * [ -r report-file ] \ 266 * [...[[expect[-say[-expect...]] say expect[-say[-expect]] ...]]] 267 * 268 * Perform a UUCP-dialer-like chat script on stdin and stdout. 269 */ 270 int 271 main(argc, argv) 272 int argc; 273 char **argv; 274 { 275 int option; 276 char *arg; 277 278 program_name = *argv; 279 tzset(); 280 281 while ((option = OPTION(argc, argv)) != 0) { 282 switch (option) { 283 case 'e': 284 ++echo; 285 break; 286 287 case 'E': 288 ++use_env; 289 break; 290 291 case 'v': 292 ++verbose; 293 break; 294 295 case 'V': 296 ++Verbose; 297 break; 298 299 case 's': 300 ++to_stderr; 301 break; 302 303 case 'S': 304 to_log = 0; 305 break; 306 307 case 'f': 308 if ((arg = OPTARG(argc, argv)) != NULL) 309 chat_file = copy_of(arg); 310 else 311 usage(); 312 break; 313 314 case 't': 315 if ((arg = OPTARG(argc, argv)) != NULL) 316 timeout = atoi(arg); 317 else 318 usage(); 319 break; 320 321 case 'r': 322 arg = OPTARG (argc, argv); 323 if (arg) { 324 if (report_fp != NULL) 325 fclose (report_fp); 326 report_file = copy_of (arg); 327 report_fp = fopen (report_file, "a"); 328 if (report_fp != NULL) { 329 if (verbose) 330 fprintf (report_fp, "Opening \"%s\"...\n", 331 report_file); 332 report = 1; 333 } 334 } 335 break; 336 337 case 'T': 338 if ((arg = OPTARG(argc, argv)) != NULL) 339 phone_num = copy_of(arg); 340 else 341 usage(); 342 break; 343 344 case 'U': 345 if ((arg = OPTARG(argc, argv)) != NULL) 346 phone_num2 = copy_of(arg); 347 else 348 usage(); 349 break; 350 351 default: 352 usage(); 353 break; 354 } 355 } 356 /* 357 * Default the report file to the stderr location 358 */ 359 if (report_fp == NULL) 360 report_fp = stderr; 361 362 if (to_log) { 363 #ifdef ultrix 364 openlog("chat", LOG_PID); 365 #else 366 openlog("chat", LOG_PID | LOG_NDELAY, LOG_LOCAL2); 367 368 if (verbose) 369 setlogmask(LOG_UPTO(LOG_INFO)); 370 else 371 setlogmask(LOG_UPTO(LOG_WARNING)); 372 #endif 373 } 374 375 init(); 376 377 if (chat_file != NULL) { 378 arg = ARG(argc, argv); 379 if (arg != NULL) 380 usage(); 381 else 382 do_file (chat_file); 383 } else { 384 while ((arg = ARG(argc, argv)) != NULL) { 385 chat_expect(arg); 386 387 if ((arg = ARG(argc, argv)) != NULL) 388 chat_send(arg); 389 } 390 } 391 392 terminate(0); 393 return 0; 394 } 395 396 /* 397 * Process a chat script when read from a file. 398 */ 399 400 void do_file (chat_file) 401 char *chat_file; 402 { 403 int linect, sendflg; 404 char *sp, *arg, quote; 405 char buf [STR_LEN]; 406 FILE *cfp; 407 408 cfp = fopen (chat_file, "r"); 409 if (cfp == NULL) 410 fatal(1, "%s -- open failed: %m", chat_file); 411 412 linect = 0; 413 sendflg = 0; 414 415 while (fgets(buf, STR_LEN, cfp) != NULL) { 416 sp = strchr (buf, '\n'); 417 if (sp) 418 *sp = '\0'; 419 420 linect++; 421 sp = buf; 422 423 /* lines starting with '#' are comments. If a real '#' 424 is to be expected, it should be quoted .... */ 425 if ( *sp == '#' ) 426 continue; 427 428 while (*sp != '\0') { 429 if (*sp == ' ' || *sp == '\t') { 430 ++sp; 431 continue; 432 } 433 434 if (*sp == '"' || *sp == '\'') { 435 quote = *sp++; 436 arg = sp; 437 while (*sp != quote) { 438 if (*sp == '\0') 439 fatal(1, "unterminated quote (line %d)", linect); 440 441 if (*sp++ == '\\') { 442 if (*sp != '\0') 443 ++sp; 444 } 445 } 446 } 447 else { 448 arg = sp; 449 while (*sp != '\0' && *sp != ' ' && *sp != '\t') 450 ++sp; 451 } 452 453 if (*sp != '\0') 454 *sp++ = '\0'; 455 456 if (sendflg) 457 chat_send (arg); 458 else 459 chat_expect (arg); 460 sendflg = !sendflg; 461 } 462 } 463 fclose (cfp); 464 } 465 466 /* 467 * We got an error parsing the command line. 468 */ 469 void usage() 470 { 471 fprintf(stderr, "\ 472 Usage: %s [-e] [-E] [-v] [-V] [-t timeout] [-r report-file]\n\ 473 [-T phone-number] [-U phone-number2] {-f chat-file | chat-script}\n", program_name); 474 exit(1); 475 } 476 477 char line[1024]; 478 479 /* 480 * Send a message to syslog and/or stderr. 481 */ 482 void logf __V((const char *fmt, ...)) 483 { 484 va_list args; 485 486 #ifdef __STDC__ 487 va_start(args, fmt); 488 #else 489 char *fmt; 490 va_start(args); 491 fmt = va_arg(args, char *); 492 #endif 493 494 vfmtmsg(line, sizeof(line), fmt, args); 495 if (to_log) 496 syslog(LOG_INFO, "%s", line); 497 if (to_stderr) 498 fprintf(stderr, "%s\n", line); 499 } 500 501 /* 502 * Print an error message and terminate. 503 */ 504 505 void fatal __V((int code, const char *fmt, ...)) 506 { 507 va_list args; 508 509 #ifdef __STDC__ 510 va_start(args, fmt); 511 #else 512 int code; 513 char *fmt; 514 va_start(args); 515 code = va_arg(args, int); 516 fmt = va_arg(args, char *); 517 #endif 518 519 vfmtmsg(line, sizeof(line), fmt, args); 520 if (to_log) 521 syslog(LOG_ERR, "%s", line); 522 if (to_stderr) 523 fprintf(stderr, "%s\n", line); 524 terminate(code); 525 } 526 527 int alarmed = 0; 528 529 SIGTYPE sigalrm(signo) 530 int signo; 531 { 532 int flags; 533 534 alarm(1); 535 alarmed = 1; /* Reset alarm to avoid race window */ 536 signal(SIGALRM, sigalrm); /* that can cause hanging in read() */ 537 538 if ((flags = fcntl(0, F_GETFL, 0)) == -1) 539 fatal(2, "Can't get file mode flags on stdin: %m"); 540 541 if (fcntl(0, F_SETFL, flags | O_NONBLOCK) == -1) 542 fatal(2, "Can't set file mode flags on stdin: %m"); 543 544 if (verbose) 545 logf("alarm"); 546 } 547 548 void unalarm() 549 { 550 int flags; 551 552 if ((flags = fcntl(0, F_GETFL, 0)) == -1) 553 fatal(2, "Can't get file mode flags on stdin: %m"); 554 555 if (fcntl(0, F_SETFL, flags & ~O_NONBLOCK) == -1) 556 fatal(2, "Can't set file mode flags on stdin: %m"); 557 } 558 559 SIGTYPE sigint(signo) 560 int signo; 561 { 562 fatal(2, "SIGINT"); 563 } 564 565 SIGTYPE sigterm(signo) 566 int signo; 567 { 568 fatal(2, "SIGTERM"); 569 } 570 571 SIGTYPE sighup(signo) 572 int signo; 573 { 574 fatal(2, "SIGHUP"); 575 } 576 577 void init() 578 { 579 signal(SIGINT, sigint); 580 signal(SIGTERM, sigterm); 581 signal(SIGHUP, sighup); 582 583 set_tty_parameters(); 584 signal(SIGALRM, sigalrm); 585 alarm(0); 586 alarmed = 0; 587 } 588 589 void set_tty_parameters() 590 { 591 #if defined(get_term_param) 592 term_parms t; 593 594 if (get_term_param (&t) < 0) 595 fatal(2, "Can't get terminal parameters: %m"); 596 597 saved_tty_parameters = t; 598 have_tty_parameters = 1; 599 600 t.c_iflag |= IGNBRK | ISTRIP | IGNPAR; 601 t.c_oflag = 0; 602 t.c_lflag = 0; 603 t.c_cc[VERASE] = 604 t.c_cc[VKILL] = 0; 605 t.c_cc[VMIN] = 1; 606 t.c_cc[VTIME] = 0; 607 608 if (set_term_param (&t) < 0) 609 fatal(2, "Can't set terminal parameters: %m"); 610 #endif 611 } 612 613 void break_sequence() 614 { 615 #ifdef TERMIOS 616 tcsendbreak (0, 0); 617 #endif 618 } 619 620 void terminate(status) 621 int status; 622 { 623 static int terminating = 0; 624 625 if (terminating) 626 exit(status); 627 terminating = 1; 628 echo_stderr(-1); 629 /* 630 * Allow the last of the report string to be gathered before we terminate. 631 */ 632 if (report_gathering) { 633 int c, rep_len; 634 635 rep_len = strlen(report_buffer); 636 while (rep_len + 1 <= sizeof(report_buffer)) { 637 alarm(1); 638 c = get_char(); 639 alarm(0); 640 if (c < 0 || iscntrl(c)) 641 break; 642 report_buffer[rep_len] = c; 643 ++rep_len; 644 } 645 report_buffer[rep_len] = 0; 646 fprintf (report_fp, "chat: %s\n", report_buffer); 647 } 648 if (report_file != (char *) 0 && report_fp != (FILE *) NULL) { 649 if (verbose) 650 fprintf (report_fp, "Closing \"%s\".\n", report_file); 651 fclose (report_fp); 652 report_fp = (FILE *) NULL; 653 } 654 655 #if defined(get_term_param) 656 if (have_tty_parameters) { 657 if (set_term_param (&saved_tty_parameters) < 0) 658 fatal(2, "Can't restore terminal parameters: %m"); 659 } 660 #endif 661 662 exit(status); 663 } 664 665 /* 666 * 'Clean up' this string. 667 */ 668 char *clean(s, sending) 669 register char *s; 670 int sending; /* set to 1 when sending (putting) this string. */ 671 { 672 char temp[STR_LEN], env_str[STR_LEN], cur_chr; 673 register char *s1, *phchar; 674 int add_return = sending; 675 #define isoctal(chr) (((chr) >= '0') && ((chr) <= '7')) 676 #define isalnumx(chr) ((((chr) >= '0') && ((chr) <= '9')) \ 677 || (((chr) >= 'a') && ((chr) <= 'z')) \ 678 || (((chr) >= 'A') && ((chr) <= 'Z')) \ 679 || (chr) == '_') 680 681 s1 = temp; 682 while (*s) { 683 cur_chr = *s++; 684 if (cur_chr == '^') { 685 cur_chr = *s++; 686 if (cur_chr == '\0') { 687 *s1++ = '^'; 688 break; 689 } 690 cur_chr &= 0x1F; 691 if (cur_chr != 0) { 692 *s1++ = cur_chr; 693 } 694 continue; 695 } 696 697 if (use_env && cur_chr == '$') { /* ARI */ 698 phchar = env_str; 699 while (isalnumx(*s)) 700 *phchar++ = *s++; 701 *phchar = '\0'; 702 phchar = getenv(env_str); 703 if (phchar) 704 while (*phchar) 705 *s1++ = *phchar++; 706 continue; 707 } 708 709 if (cur_chr != '\\') { 710 *s1++ = cur_chr; 711 continue; 712 } 713 714 cur_chr = *s++; 715 if (cur_chr == '\0') { 716 if (sending) { 717 *s1++ = '\\'; 718 *s1++ = '\\'; 719 } 720 break; 721 } 722 723 switch (cur_chr) { 724 case 'b': 725 *s1++ = '\b'; 726 break; 727 728 case 'c': 729 if (sending && *s == '\0') 730 add_return = 0; 731 else 732 *s1++ = cur_chr; 733 break; 734 735 case '\\': 736 case 'K': 737 case 'p': 738 case 'd': 739 if (sending) 740 *s1++ = '\\'; 741 *s1++ = cur_chr; 742 break; 743 744 case 'T': 745 if (sending && phone_num) { 746 for (phchar = phone_num; *phchar != '\0'; phchar++) 747 *s1++ = *phchar; 748 } 749 else { 750 *s1++ = '\\'; 751 *s1++ = 'T'; 752 } 753 break; 754 755 case 'U': 756 if (sending && phone_num2) { 757 for (phchar = phone_num2; *phchar != '\0'; phchar++) 758 *s1++ = *phchar; 759 } 760 else { 761 *s1++ = '\\'; 762 *s1++ = 'U'; 763 } 764 break; 765 766 case 'q': 767 quiet = 1; 768 break; 769 770 case 'r': 771 *s1++ = '\r'; 772 break; 773 774 case 'n': 775 *s1++ = '\n'; 776 break; 777 778 case 's': 779 *s1++ = ' '; 780 break; 781 782 case 't': 783 *s1++ = '\t'; 784 break; 785 786 case 'N': 787 if (sending) { 788 *s1++ = '\\'; 789 *s1++ = '\0'; 790 } 791 else 792 *s1++ = 'N'; 793 break; 794 795 case '$': /* ARI */ 796 if (use_env) { 797 *s1++ = cur_chr; 798 break; 799 } 800 /* FALL THROUGH */ 801 802 default: 803 if (isoctal (cur_chr)) { 804 cur_chr &= 0x07; 805 if (isoctal (*s)) { 806 cur_chr <<= 3; 807 cur_chr |= *s++ - '0'; 808 if (isoctal (*s)) { 809 cur_chr <<= 3; 810 cur_chr |= *s++ - '0'; 811 } 812 } 813 814 if (cur_chr != 0 || sending) { 815 if (sending && (cur_chr == '\\' || cur_chr == 0)) 816 *s1++ = '\\'; 817 *s1++ = cur_chr; 818 } 819 break; 820 } 821 822 if (sending) 823 *s1++ = '\\'; 824 *s1++ = cur_chr; 825 break; 826 } 827 } 828 829 if (add_return) 830 *s1++ = '\r'; 831 832 *s1++ = '\0'; /* guarantee closure */ 833 *s1++ = '\0'; /* terminate the string */ 834 return dup_mem (temp, (size_t) (s1 - temp)); /* may have embedded nuls */ 835 } 836 837 /* 838 * A modified version of 'strtok'. This version skips \ sequences. 839 */ 840 841 char *expect_strtok (s, term) 842 char *s, *term; 843 { 844 static char *str = ""; 845 int escape_flag = 0; 846 char *result; 847 848 /* 849 * If a string was specified then do initial processing. 850 */ 851 if (s) 852 str = s; 853 854 /* 855 * If this is the escape flag then reset it and ignore the character. 856 */ 857 if (*str) 858 result = str; 859 else 860 result = (char *) 0; 861 862 while (*str) { 863 if (escape_flag) { 864 escape_flag = 0; 865 ++str; 866 continue; 867 } 868 869 if (*str == '\\') { 870 ++str; 871 escape_flag = 1; 872 continue; 873 } 874 875 /* 876 * If this is not in the termination string, continue. 877 */ 878 if (strchr (term, *str) == (char *) 0) { 879 ++str; 880 continue; 881 } 882 883 /* 884 * This is the terminator. Mark the end of the string and stop. 885 */ 886 *str++ = '\0'; 887 break; 888 } 889 return (result); 890 } 891 892 /* 893 * Process the expect string 894 */ 895 896 void chat_expect (s) 897 char *s; 898 { 899 char *expect; 900 char *reply; 901 902 if (strcmp(s, "HANGUP") == 0) { 903 ++hup_next; 904 return; 905 } 906 907 if (strcmp(s, "ABORT") == 0) { 908 ++abort_next; 909 return; 910 } 911 912 if (strcmp(s, "CLR_ABORT") == 0) { 913 ++clear_abort_next; 914 return; 915 } 916 917 if (strcmp(s, "REPORT") == 0) { 918 ++report_next; 919 return; 920 } 921 922 if (strcmp(s, "CLR_REPORT") == 0) { 923 ++clear_report_next; 924 return; 925 } 926 927 if (strcmp(s, "TIMEOUT") == 0) { 928 ++timeout_next; 929 return; 930 } 931 932 if (strcmp(s, "ECHO") == 0) { 933 ++echo_next; 934 return; 935 } 936 937 if (strcmp(s, "SAY") == 0) { 938 ++say_next; 939 return; 940 } 941 942 /* 943 * Fetch the expect and reply string. 944 */ 945 for (;;) { 946 expect = expect_strtok (s, "-"); 947 s = (char *) 0; 948 949 if (expect == (char *) 0) 950 return; 951 952 reply = expect_strtok (s, "-"); 953 954 /* 955 * Handle the expect string. If successful then exit. 956 */ 957 if (get_string (expect)) 958 return; 959 960 /* 961 * If there is a sub-reply string then send it. Otherwise any condition 962 * is terminal. 963 */ 964 if (reply == (char *) 0 || exit_code != 3) 965 break; 966 967 chat_send (reply); 968 } 969 970 /* 971 * The expectation did not occur. This is terminal. 972 */ 973 if (fail_reason) 974 logf("Failed (%s)", fail_reason); 975 else 976 logf("Failed"); 977 terminate(exit_code); 978 } 979 980 /* 981 * Translate the input character to the appropriate string for printing 982 * the data. 983 */ 984 985 char *character(c) 986 int c; 987 { 988 static char string[10]; 989 char *meta; 990 991 meta = (c & 0x80) ? "M-" : ""; 992 c &= 0x7F; 993 994 if (c < 32) 995 sprintf(string, "%s^%c", meta, (int)c + '@'); 996 else if (c == 127) 997 sprintf(string, "%s^?", meta); 998 else 999 sprintf(string, "%s%c", meta, c); 1000 1001 return (string); 1002 } 1003 1004 /* 1005 * process the reply string 1006 */ 1007 void chat_send (s) 1008 register char *s; 1009 { 1010 char file_data[STR_LEN]; 1011 1012 if (say_next) { 1013 say_next = 0; 1014 s = clean(s, 1); 1015 write(2, s, strlen(s)); 1016 free(s); 1017 return; 1018 } 1019 1020 if (hup_next) { 1021 hup_next = 0; 1022 if (strcmp(s, "OFF") == 0) 1023 signal(SIGHUP, SIG_IGN); 1024 else 1025 signal(SIGHUP, sighup); 1026 return; 1027 } 1028 1029 if (echo_next) { 1030 echo_next = 0; 1031 echo = (strcmp(s, "ON") == 0); 1032 return; 1033 } 1034 1035 if (abort_next) { 1036 char *s1; 1037 1038 abort_next = 0; 1039 1040 if (n_aborts >= MAX_ABORTS) 1041 fatal(2, "Too many ABORT strings"); 1042 1043 s1 = clean(s, 0); 1044 1045 if (strlen(s1) > strlen(s) 1046 || strlen(s1) + 1 > sizeof(fail_buffer)) 1047 fatal(1, "Illegal or too-long ABORT string ('%v')", s); 1048 1049 abort_string[n_aborts++] = s1; 1050 1051 if (verbose) 1052 logf("abort on (%v)", s); 1053 return; 1054 } 1055 1056 if (clear_abort_next) { 1057 char *s1; 1058 int i; 1059 int old_max; 1060 int pack = 0; 1061 1062 clear_abort_next = 0; 1063 1064 s1 = clean(s, 0); 1065 1066 if (strlen(s1) > strlen(s) 1067 || strlen(s1) + 1 > sizeof(fail_buffer)) 1068 fatal(1, "Illegal or too-long CLR_ABORT string ('%v')", s); 1069 1070 old_max = n_aborts; 1071 for (i=0; i < n_aborts; i++) { 1072 if ( strcmp(s1,abort_string[i]) == 0 ) { 1073 free(abort_string[i]); 1074 abort_string[i] = NULL; 1075 pack++; 1076 n_aborts--; 1077 if (verbose) 1078 logf("clear abort on (%v)", s); 1079 } 1080 } 1081 free(s1); 1082 if (pack) 1083 pack_array(abort_string,old_max); 1084 return; 1085 } 1086 1087 if (report_next) { 1088 char *s1; 1089 1090 report_next = 0; 1091 if (n_reports >= MAX_REPORTS) 1092 fatal(2, "Too many REPORT strings"); 1093 1094 s1 = clean(s, 0); 1095 1096 if (strlen(s1) > strlen(s) || strlen(s1) > sizeof fail_buffer - 1) 1097 fatal(1, "Illegal or too-long REPORT string ('%v')", s); 1098 1099 report_string[n_reports++] = s1; 1100 1101 if (verbose) 1102 logf("report (%v)", s); 1103 return; 1104 } 1105 1106 if (clear_report_next) { 1107 char *s1; 1108 int i; 1109 int old_max; 1110 int pack = 0; 1111 1112 clear_report_next = 0; 1113 1114 s1 = clean(s, 0); 1115 1116 if (strlen(s1) > strlen(s) || strlen(s1) > sizeof fail_buffer - 1) 1117 fatal(1, "Illegal or too-long REPORT string ('%v')", s); 1118 1119 old_max = n_reports; 1120 for (i=0; i < n_reports; i++) { 1121 if ( strcmp(s1,report_string[i]) == 0 ) { 1122 free(report_string[i]); 1123 report_string[i] = NULL; 1124 pack++; 1125 n_reports--; 1126 if (verbose) 1127 logf("clear report (%v)", s); 1128 } 1129 } 1130 free(s1); 1131 if (pack) 1132 pack_array(report_string,old_max); 1133 1134 return; 1135 } 1136 1137 if (timeout_next) { 1138 timeout_next = 0; 1139 timeout = atoi(s); 1140 1141 if (timeout <= 0) 1142 timeout = DEFAULT_CHAT_TIMEOUT; 1143 1144 if (verbose) 1145 logf("timeout set to %d seconds", timeout); 1146 1147 return; 1148 } 1149 1150 /* 1151 * The syntax @filename means read the string to send from the 1152 * file `filename'. 1153 */ 1154 if (s[0] == '@') { 1155 /* skip the @ and any following white-space */ 1156 char *fn = s; 1157 while (*++fn == ' ' || *fn == '\t') 1158 ; 1159 1160 if (*fn != 0) { 1161 FILE *f; 1162 int n = 0; 1163 1164 /* open the file and read until STR_LEN-1 bytes or end-of-file */ 1165 f = fopen(fn, "r"); 1166 if (f == NULL) 1167 fatal(1, "%s -- open failed: %m", fn); 1168 while (n < STR_LEN - 1) { 1169 int nr = fread(&file_data[n], 1, STR_LEN - 1 - n, f); 1170 if (nr < 0) 1171 fatal(1, "%s -- read error", fn); 1172 if (nr == 0) 1173 break; 1174 n += nr; 1175 } 1176 fclose(f); 1177 1178 /* use the string we got as the string to send, 1179 but trim off the final newline if any. */ 1180 if (n > 0 && file_data[n-1] == '\n') 1181 --n; 1182 file_data[n] = 0; 1183 s = file_data; 1184 } 1185 } 1186 1187 if (strcmp(s, "EOT") == 0) 1188 s = "^D\\c"; 1189 else if (strcmp(s, "BREAK") == 0) 1190 s = "\\K\\c"; 1191 1192 if (!put_string(s)) 1193 fatal(1, "Failed"); 1194 } 1195 1196 int get_char() 1197 { 1198 int status; 1199 char c; 1200 1201 status = read(0, &c, 1); 1202 1203 switch (status) { 1204 case 1: 1205 return ((int)c & 0x7F); 1206 1207 default: 1208 logf("warning: read() on stdin returned %d", status); 1209 /* FALLTHROUGH */ 1210 1211 case -1: 1212 if ((status = fcntl(0, F_GETFL, 0)) == -1) 1213 fatal(2, "Can't get file mode flags on stdin: %m"); 1214 1215 if (fcntl(0, F_SETFL, status & ~O_NONBLOCK) == -1) 1216 fatal(2, "Can't set file mode flags on stdin: %m"); 1217 1218 return (-1); 1219 } 1220 } 1221 1222 int put_char(c) 1223 int c; 1224 { 1225 int status; 1226 char ch = c; 1227 1228 usleep(10000); /* inter-character typing delay (?) */ 1229 1230 status = write(1, &ch, 1); 1231 1232 switch (status) { 1233 case 1: 1234 return (0); 1235 1236 default: 1237 logf("warning: write() on stdout returned %d", status); 1238 /* FALLTHROUGH */ 1239 1240 case -1: 1241 if ((status = fcntl(0, F_GETFL, 0)) == -1) 1242 fatal(2, "Can't get file mode flags on stdin, %m"); 1243 1244 if (fcntl(0, F_SETFL, status & ~O_NONBLOCK) == -1) 1245 fatal(2, "Can't set file mode flags on stdin: %m"); 1246 1247 return (-1); 1248 } 1249 } 1250 1251 int write_char (c) 1252 int c; 1253 { 1254 if (alarmed || put_char(c) < 0) { 1255 alarm(0); 1256 alarmed = 0; 1257 1258 if (verbose) { 1259 if (errno == EINTR || errno == EWOULDBLOCK) 1260 logf(" -- write timed out"); 1261 else 1262 logf(" -- write failed: %m"); 1263 } 1264 return (0); 1265 } 1266 return (1); 1267 } 1268 1269 int put_string (s) 1270 register char *s; 1271 { 1272 quiet = 0; 1273 s = clean(s, 1); 1274 1275 if (verbose) { 1276 if (quiet) 1277 logf("send (??????)"); 1278 else 1279 logf("send (%v)", s); 1280 } 1281 1282 alarm(timeout); alarmed = 0; 1283 1284 while (*s) { 1285 register char c = *s++; 1286 1287 if (c != '\\') { 1288 if (!write_char (c)) 1289 return 0; 1290 continue; 1291 } 1292 1293 c = *s++; 1294 switch (c) { 1295 case 'd': 1296 sleep(1); 1297 break; 1298 1299 case 'K': 1300 break_sequence(); 1301 break; 1302 1303 case 'p': 1304 usleep(10000); /* 1/100th of a second (arg is microseconds) */ 1305 break; 1306 1307 default: 1308 if (!write_char (c)) 1309 return 0; 1310 break; 1311 } 1312 } 1313 1314 alarm(0); 1315 alarmed = 0; 1316 return (1); 1317 } 1318 1319 /* 1320 * Echo a character to stderr. 1321 * When called with -1, a '\n' character is generated when 1322 * the cursor is not at the beginning of a line. 1323 */ 1324 void echo_stderr(n) 1325 int n; 1326 { 1327 static int need_lf; 1328 char *s; 1329 1330 switch (n) { 1331 case '\r': /* ignore '\r' */ 1332 break; 1333 case -1: 1334 if (need_lf == 0) 1335 break; 1336 /* fall through */ 1337 case '\n': 1338 write(2, "\n", 1); 1339 need_lf = 0; 1340 break; 1341 default: 1342 s = character(n); 1343 write(2, s, strlen(s)); 1344 need_lf = 1; 1345 break; 1346 } 1347 } 1348 1349 /* 1350 * 'Wait for' this string to appear on this file descriptor. 1351 */ 1352 int get_string(string) 1353 register char *string; 1354 { 1355 char temp[STR_LEN]; 1356 int c, printed = 0, len, minlen; 1357 register char *s = temp, *end = s + STR_LEN; 1358 char *logged = temp; 1359 1360 fail_reason = (char *)0; 1361 string = clean(string, 0); 1362 len = strlen(string); 1363 minlen = (len > sizeof(fail_buffer)? len: sizeof(fail_buffer)) - 1; 1364 1365 if (verbose) 1366 logf("expect (%v)", string); 1367 1368 if (len > STR_LEN) { 1369 logf("expect string is too long"); 1370 exit_code = 1; 1371 return 0; 1372 } 1373 1374 if (len == 0) { 1375 if (verbose) 1376 logf("got it"); 1377 return (1); 1378 } 1379 1380 alarm(timeout); 1381 alarmed = 0; 1382 1383 while ( ! alarmed && (c = get_char()) >= 0) { 1384 int n, abort_len, report_len; 1385 1386 if (echo) 1387 echo_stderr(c); 1388 if (verbose && c == '\n') { 1389 if (s == logged) 1390 logf(""); /* blank line */ 1391 else 1392 logf("%0.*v", s - logged, logged); 1393 logged = s + 1; 1394 } 1395 1396 *s++ = c; 1397 1398 if (verbose && s >= logged + 80) { 1399 logf("%0.*v", s - logged, logged); 1400 logged = s; 1401 } 1402 1403 if (Verbose) { 1404 if (c == '\n') 1405 fputc( '\n', stderr ); 1406 else if (c != '\r') 1407 fprintf( stderr, "%s", character(c) ); 1408 } 1409 1410 if (!report_gathering) { 1411 for (n = 0; n < n_reports; ++n) { 1412 if ((report_string[n] != (char*) NULL) && 1413 s - temp >= (report_len = strlen(report_string[n])) && 1414 strncmp(s - report_len, report_string[n], report_len) == 0) { 1415 time_t time_now = time ((time_t*) NULL); 1416 struct tm* tm_now = localtime (&time_now); 1417 1418 strftime (report_buffer, 20, "%b %d %H:%M:%S ", tm_now); 1419 strcat (report_buffer, report_string[n]); 1420 1421 report_string[n] = (char *) NULL; 1422 report_gathering = 1; 1423 break; 1424 } 1425 } 1426 } 1427 else { 1428 if (!iscntrl (c)) { 1429 int rep_len = strlen (report_buffer); 1430 report_buffer[rep_len] = c; 1431 report_buffer[rep_len + 1] = '\0'; 1432 } 1433 else { 1434 report_gathering = 0; 1435 fprintf (report_fp, "chat: %s\n", report_buffer); 1436 } 1437 } 1438 1439 if (s - temp >= len && 1440 c == string[len - 1] && 1441 strncmp(s - len, string, len) == 0) { 1442 if (verbose) { 1443 if (s > logged) 1444 logf("%0.*v", s - logged, logged); 1445 logf(" -- got it\n"); 1446 } 1447 1448 alarm(0); 1449 alarmed = 0; 1450 return (1); 1451 } 1452 1453 for (n = 0; n < n_aborts; ++n) { 1454 if (s - temp >= (abort_len = strlen(abort_string[n])) && 1455 strncmp(s - abort_len, abort_string[n], abort_len) == 0) { 1456 if (verbose) { 1457 if (s > logged) 1458 logf("%0.*v", s - logged, logged); 1459 logf(" -- failed"); 1460 } 1461 1462 alarm(0); 1463 alarmed = 0; 1464 exit_code = n + 4; 1465 strcpy(fail_reason = fail_buffer, abort_string[n]); 1466 return (0); 1467 } 1468 } 1469 1470 if (s >= end) { 1471 if (logged < s - minlen) { 1472 if (verbose) 1473 logf("%0.*v", s - logged, logged); 1474 logged = s; 1475 } 1476 s -= minlen; 1477 memmove(temp, s, minlen); 1478 logged = temp + (logged - s); 1479 s = temp + minlen; 1480 } 1481 1482 if (alarmed && verbose) 1483 logf("warning: alarm synchronization problem"); 1484 } 1485 1486 alarm(0); 1487 1488 if (verbose && printed) { 1489 if (alarmed) 1490 logf(" -- read timed out"); 1491 else 1492 logf(" -- read failed: %m"); 1493 } 1494 1495 exit_code = 3; 1496 alarmed = 0; 1497 return (0); 1498 } 1499 1500 /* 1501 * Gross kludge to handle Solaris versions >= 2.6 having usleep. 1502 */ 1503 #ifdef SOL2 1504 #include <sys/param.h> 1505 #if MAXUID > 65536 /* then this is Solaris 2.6 or later */ 1506 #undef NO_USLEEP 1507 #endif 1508 #endif /* SOL2 */ 1509 1510 #ifdef NO_USLEEP 1511 #include <sys/types.h> 1512 #include <sys/time.h> 1513 1514 /* 1515 usleep -- support routine for 4.2BSD system call emulations 1516 last edit: 29-Oct-1984 D A Gwyn 1517 */ 1518 1519 extern int select(); 1520 1521 int 1522 usleep( usec ) /* returns 0 if ok, else -1 */ 1523 long usec; /* delay in microseconds */ 1524 { 1525 static struct { /* `timeval' */ 1526 long tv_sec; /* seconds */ 1527 long tv_usec; /* microsecs */ 1528 } delay; /* _select() timeout */ 1529 1530 delay.tv_sec = usec / 1000000L; 1531 delay.tv_usec = usec % 1000000L; 1532 1533 return select(0, (long *)0, (long *)0, (long *)0, &delay); 1534 } 1535 #endif 1536 1537 void 1538 pack_array (array, end) 1539 char **array; /* The address of the array of string pointers */ 1540 int end; /* The index of the next free entry before CLR_ */ 1541 { 1542 int i, j; 1543 1544 for (i = 0; i < end; i++) { 1545 if (array[i] == NULL) { 1546 for (j = i+1; j < end; ++j) 1547 if (array[j] != NULL) 1548 array[i++] = array[j]; 1549 for (; i < end; ++i) 1550 array[i] = NULL; 1551 break; 1552 } 1553 } 1554 } 1555 1556 /* 1557 * vfmtmsg - format a message into a buffer. Like vsprintf except we 1558 * also specify the length of the output buffer, and we handle the 1559 * %m (error message) format. 1560 * Doesn't do floating-point formats. 1561 * Returns the number of chars put into buf. 1562 */ 1563 #define OUTCHAR(c) (buflen > 0? (--buflen, *buf++ = (c)): 0) 1564 1565 int 1566 vfmtmsg(buf, buflen, fmt, args) 1567 char *buf; 1568 int buflen; 1569 const char *fmt; 1570 va_list args; 1571 { 1572 int c, i, n; 1573 int width, prec, fillch; 1574 int base, len, neg, quoted; 1575 unsigned long val = 0; 1576 char *str, *buf0; 1577 const char *f; 1578 unsigned char *p; 1579 char num[32]; 1580 static char hexchars[] = "0123456789abcdef"; 1581 1582 buf0 = buf; 1583 --buflen; 1584 while (buflen > 0) { 1585 for (f = fmt; *f != '%' && *f != 0; ++f) 1586 ; 1587 if (f > fmt) { 1588 len = f - fmt; 1589 if (len > buflen) 1590 len = buflen; 1591 memcpy(buf, fmt, len); 1592 buf += len; 1593 buflen -= len; 1594 fmt = f; 1595 } 1596 if (*fmt == 0) 1597 break; 1598 c = *++fmt; 1599 width = prec = 0; 1600 fillch = ' '; 1601 if (c == '0') { 1602 fillch = '0'; 1603 c = *++fmt; 1604 } 1605 if (c == '*') { 1606 width = va_arg(args, int); 1607 c = *++fmt; 1608 } else { 1609 while (isdigit(c)) { 1610 width = width * 10 + c - '0'; 1611 c = *++fmt; 1612 } 1613 } 1614 if (c == '.') { 1615 c = *++fmt; 1616 if (c == '*') { 1617 prec = va_arg(args, int); 1618 c = *++fmt; 1619 } else { 1620 while (isdigit(c)) { 1621 prec = prec * 10 + c - '0'; 1622 c = *++fmt; 1623 } 1624 } 1625 } 1626 str = 0; 1627 base = 0; 1628 neg = 0; 1629 ++fmt; 1630 switch (c) { 1631 case 'd': 1632 i = va_arg(args, int); 1633 if (i < 0) { 1634 neg = 1; 1635 val = -i; 1636 } else 1637 val = i; 1638 base = 10; 1639 break; 1640 case 'o': 1641 val = va_arg(args, unsigned int); 1642 base = 8; 1643 break; 1644 case 'x': 1645 val = va_arg(args, unsigned int); 1646 base = 16; 1647 break; 1648 case 'p': 1649 val = (unsigned long) va_arg(args, void *); 1650 base = 16; 1651 neg = 2; 1652 break; 1653 case 's': 1654 str = va_arg(args, char *); 1655 break; 1656 case 'c': 1657 num[0] = va_arg(args, int); 1658 num[1] = 0; 1659 str = num; 1660 break; 1661 case 'm': 1662 str = strerror(errno); 1663 break; 1664 case 'v': /* "visible" string */ 1665 case 'q': /* quoted string */ 1666 quoted = c == 'q'; 1667 p = va_arg(args, unsigned char *); 1668 if (fillch == '0' && prec > 0) { 1669 n = prec; 1670 } else { 1671 n = strlen((char *)p); 1672 if (prec > 0 && prec < n) 1673 n = prec; 1674 } 1675 while (n > 0 && buflen > 0) { 1676 c = *p++; 1677 --n; 1678 if (!quoted && c >= 0x80) { 1679 OUTCHAR('M'); 1680 OUTCHAR('-'); 1681 c -= 0x80; 1682 } 1683 if (quoted && (c == '"' || c == '\\')) 1684 OUTCHAR('\\'); 1685 if (c < 0x20 || (0x7f <= c && c < 0xa0)) { 1686 if (quoted) { 1687 OUTCHAR('\\'); 1688 switch (c) { 1689 case '\t': OUTCHAR('t'); break; 1690 case '\n': OUTCHAR('n'); break; 1691 case '\b': OUTCHAR('b'); break; 1692 case '\f': OUTCHAR('f'); break; 1693 default: 1694 OUTCHAR('x'); 1695 OUTCHAR(hexchars[c >> 4]); 1696 OUTCHAR(hexchars[c & 0xf]); 1697 } 1698 } else { 1699 if (c == '\t') 1700 OUTCHAR(c); 1701 else { 1702 OUTCHAR('^'); 1703 OUTCHAR(c ^ 0x40); 1704 } 1705 } 1706 } else 1707 OUTCHAR(c); 1708 } 1709 continue; 1710 default: 1711 *buf++ = '%'; 1712 if (c != '%') 1713 --fmt; /* so %z outputs %z etc. */ 1714 --buflen; 1715 continue; 1716 } 1717 if (base != 0) { 1718 str = num + sizeof(num); 1719 *--str = 0; 1720 while (str > num + neg) { 1721 *--str = hexchars[val % base]; 1722 val = val / base; 1723 if (--prec <= 0 && val == 0) 1724 break; 1725 } 1726 switch (neg) { 1727 case 1: 1728 *--str = '-'; 1729 break; 1730 case 2: 1731 *--str = 'x'; 1732 *--str = '0'; 1733 break; 1734 } 1735 len = num + sizeof(num) - 1 - str; 1736 } else { 1737 len = strlen(str); 1738 if (prec > 0 && len > prec) 1739 len = prec; 1740 } 1741 if (width > 0) { 1742 if (width > buflen) 1743 width = buflen; 1744 if ((n = width - len) > 0) { 1745 buflen -= n; 1746 for (; n > 0; --n) 1747 *buf++ = fillch; 1748 } 1749 } 1750 if (len > buflen) 1751 len = buflen; 1752 memcpy(buf, str, len); 1753 buf += len; 1754 buflen -= len; 1755 } 1756 *buf = 0; 1757 return buf - buf0; 1758 } 1759