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 1210 case -1: 1211 if ((status = fcntl(0, F_GETFL, 0)) == -1) 1212 fatal(2, "Can't get file mode flags on stdin: %m"); 1213 1214 if (fcntl(0, F_SETFL, status & ~O_NONBLOCK) == -1) 1215 fatal(2, "Can't set file mode flags on stdin: %m"); 1216 1217 return (-1); 1218 } 1219 } 1220 1221 int put_char(c) 1222 int c; 1223 { 1224 int status; 1225 char ch = c; 1226 1227 usleep(10000); /* inter-character typing delay (?) */ 1228 1229 status = write(1, &ch, 1); 1230 1231 switch (status) { 1232 case 1: 1233 return (0); 1234 1235 default: 1236 logf("warning: write() on stdout returned %d", status); 1237 1238 case -1: 1239 if ((status = fcntl(0, F_GETFL, 0)) == -1) 1240 fatal(2, "Can't get file mode flags on stdin, %m"); 1241 1242 if (fcntl(0, F_SETFL, status & ~O_NONBLOCK) == -1) 1243 fatal(2, "Can't set file mode flags on stdin: %m"); 1244 1245 return (-1); 1246 } 1247 } 1248 1249 int write_char (c) 1250 int c; 1251 { 1252 if (alarmed || put_char(c) < 0) { 1253 alarm(0); 1254 alarmed = 0; 1255 1256 if (verbose) { 1257 if (errno == EINTR || errno == EWOULDBLOCK) 1258 logf(" -- write timed out"); 1259 else 1260 logf(" -- write failed: %m"); 1261 } 1262 return (0); 1263 } 1264 return (1); 1265 } 1266 1267 int put_string (s) 1268 register char *s; 1269 { 1270 quiet = 0; 1271 s = clean(s, 1); 1272 1273 if (verbose) { 1274 if (quiet) 1275 logf("send (??????)"); 1276 else 1277 logf("send (%v)", s); 1278 } 1279 1280 alarm(timeout); alarmed = 0; 1281 1282 while (*s) { 1283 register char c = *s++; 1284 1285 if (c != '\\') { 1286 if (!write_char (c)) 1287 return 0; 1288 continue; 1289 } 1290 1291 c = *s++; 1292 switch (c) { 1293 case 'd': 1294 sleep(1); 1295 break; 1296 1297 case 'K': 1298 break_sequence(); 1299 break; 1300 1301 case 'p': 1302 usleep(10000); /* 1/100th of a second (arg is microseconds) */ 1303 break; 1304 1305 default: 1306 if (!write_char (c)) 1307 return 0; 1308 break; 1309 } 1310 } 1311 1312 alarm(0); 1313 alarmed = 0; 1314 return (1); 1315 } 1316 1317 /* 1318 * Echo a character to stderr. 1319 * When called with -1, a '\n' character is generated when 1320 * the cursor is not at the beginning of a line. 1321 */ 1322 void echo_stderr(n) 1323 int n; 1324 { 1325 static int need_lf; 1326 char *s; 1327 1328 switch (n) { 1329 case '\r': /* ignore '\r' */ 1330 break; 1331 case -1: 1332 if (need_lf == 0) 1333 break; 1334 /* fall through */ 1335 case '\n': 1336 write(2, "\n", 1); 1337 need_lf = 0; 1338 break; 1339 default: 1340 s = character(n); 1341 write(2, s, strlen(s)); 1342 need_lf = 1; 1343 break; 1344 } 1345 } 1346 1347 /* 1348 * 'Wait for' this string to appear on this file descriptor. 1349 */ 1350 int get_string(string) 1351 register char *string; 1352 { 1353 char temp[STR_LEN]; 1354 int c, printed = 0, len, minlen; 1355 register char *s = temp, *end = s + STR_LEN; 1356 char *logged = temp; 1357 1358 fail_reason = (char *)0; 1359 string = clean(string, 0); 1360 len = strlen(string); 1361 minlen = (len > sizeof(fail_buffer)? len: sizeof(fail_buffer)) - 1; 1362 1363 if (verbose) 1364 logf("expect (%v)", string); 1365 1366 if (len > STR_LEN) { 1367 logf("expect string is too long"); 1368 exit_code = 1; 1369 return 0; 1370 } 1371 1372 if (len == 0) { 1373 if (verbose) 1374 logf("got it"); 1375 return (1); 1376 } 1377 1378 alarm(timeout); 1379 alarmed = 0; 1380 1381 while ( ! alarmed && (c = get_char()) >= 0) { 1382 int n, abort_len, report_len; 1383 1384 if (echo) 1385 echo_stderr(c); 1386 if (verbose && c == '\n') { 1387 if (s == logged) 1388 logf(""); /* blank line */ 1389 else 1390 logf("%0.*v", s - logged, logged); 1391 logged = s + 1; 1392 } 1393 1394 *s++ = c; 1395 1396 if (verbose && s >= logged + 80) { 1397 logf("%0.*v", s - logged, logged); 1398 logged = s; 1399 } 1400 1401 if (Verbose) { 1402 if (c == '\n') 1403 fputc( '\n', stderr ); 1404 else if (c != '\r') 1405 fprintf( stderr, "%s", character(c) ); 1406 } 1407 1408 if (!report_gathering) { 1409 for (n = 0; n < n_reports; ++n) { 1410 if ((report_string[n] != (char*) NULL) && 1411 s - temp >= (report_len = strlen(report_string[n])) && 1412 strncmp(s - report_len, report_string[n], report_len) == 0) { 1413 time_t time_now = time ((time_t*) NULL); 1414 struct tm* tm_now = localtime (&time_now); 1415 1416 strftime (report_buffer, 20, "%b %d %H:%M:%S ", tm_now); 1417 strcat (report_buffer, report_string[n]); 1418 1419 report_string[n] = (char *) NULL; 1420 report_gathering = 1; 1421 break; 1422 } 1423 } 1424 } 1425 else { 1426 if (!iscntrl (c)) { 1427 int rep_len = strlen (report_buffer); 1428 report_buffer[rep_len] = c; 1429 report_buffer[rep_len + 1] = '\0'; 1430 } 1431 else { 1432 report_gathering = 0; 1433 fprintf (report_fp, "chat: %s\n", report_buffer); 1434 } 1435 } 1436 1437 if (s - temp >= len && 1438 c == string[len - 1] && 1439 strncmp(s - len, string, len) == 0) { 1440 if (verbose) { 1441 if (s > logged) 1442 logf("%0.*v", s - logged, logged); 1443 logf(" -- got it\n"); 1444 } 1445 1446 alarm(0); 1447 alarmed = 0; 1448 return (1); 1449 } 1450 1451 for (n = 0; n < n_aborts; ++n) { 1452 if (s - temp >= (abort_len = strlen(abort_string[n])) && 1453 strncmp(s - abort_len, abort_string[n], abort_len) == 0) { 1454 if (verbose) { 1455 if (s > logged) 1456 logf("%0.*v", s - logged, logged); 1457 logf(" -- failed"); 1458 } 1459 1460 alarm(0); 1461 alarmed = 0; 1462 exit_code = n + 4; 1463 strcpy(fail_reason = fail_buffer, abort_string[n]); 1464 return (0); 1465 } 1466 } 1467 1468 if (s >= end) { 1469 if (logged < s - minlen) { 1470 if (verbose) 1471 logf("%0.*v", s - logged, logged); 1472 logged = s; 1473 } 1474 s -= minlen; 1475 memmove(temp, s, minlen); 1476 logged = temp + (logged - s); 1477 s = temp + minlen; 1478 } 1479 1480 if (alarmed && verbose) 1481 logf("warning: alarm synchronization problem"); 1482 } 1483 1484 alarm(0); 1485 1486 if (verbose && printed) { 1487 if (alarmed) 1488 logf(" -- read timed out"); 1489 else 1490 logf(" -- read failed: %m"); 1491 } 1492 1493 exit_code = 3; 1494 alarmed = 0; 1495 return (0); 1496 } 1497 1498 /* 1499 * Gross kludge to handle Solaris versions >= 2.6 having usleep. 1500 */ 1501 #ifdef SOL2 1502 #include <sys/param.h> 1503 #if MAXUID > 65536 /* then this is Solaris 2.6 or later */ 1504 #undef NO_USLEEP 1505 #endif 1506 #endif /* SOL2 */ 1507 1508 #ifdef NO_USLEEP 1509 #include <sys/types.h> 1510 #include <sys/time.h> 1511 1512 /* 1513 usleep -- support routine for 4.2BSD system call emulations 1514 last edit: 29-Oct-1984 D A Gwyn 1515 */ 1516 1517 extern int select(); 1518 1519 int 1520 usleep( usec ) /* returns 0 if ok, else -1 */ 1521 long usec; /* delay in microseconds */ 1522 { 1523 static struct { /* `timeval' */ 1524 long tv_sec; /* seconds */ 1525 long tv_usec; /* microsecs */ 1526 } delay; /* _select() timeout */ 1527 1528 delay.tv_sec = usec / 1000000L; 1529 delay.tv_usec = usec % 1000000L; 1530 1531 return select(0, (long *)0, (long *)0, (long *)0, &delay); 1532 } 1533 #endif 1534 1535 void 1536 pack_array (array, end) 1537 char **array; /* The address of the array of string pointers */ 1538 int end; /* The index of the next free entry before CLR_ */ 1539 { 1540 int i, j; 1541 1542 for (i = 0; i < end; i++) { 1543 if (array[i] == NULL) { 1544 for (j = i+1; j < end; ++j) 1545 if (array[j] != NULL) 1546 array[i++] = array[j]; 1547 for (; i < end; ++i) 1548 array[i] = NULL; 1549 break; 1550 } 1551 } 1552 } 1553 1554 /* 1555 * vfmtmsg - format a message into a buffer. Like vsprintf except we 1556 * also specify the length of the output buffer, and we handle the 1557 * %m (error message) format. 1558 * Doesn't do floating-point formats. 1559 * Returns the number of chars put into buf. 1560 */ 1561 #define OUTCHAR(c) (buflen > 0? (--buflen, *buf++ = (c)): 0) 1562 1563 int 1564 vfmtmsg(buf, buflen, fmt, args) 1565 char *buf; 1566 int buflen; 1567 const char *fmt; 1568 va_list args; 1569 { 1570 int c, i, n; 1571 int width, prec, fillch; 1572 int base, len, neg, quoted; 1573 unsigned long val = 0; 1574 char *str, *buf0; 1575 const char *f; 1576 unsigned char *p; 1577 char num[32]; 1578 static char hexchars[] = "0123456789abcdef"; 1579 1580 buf0 = buf; 1581 --buflen; 1582 while (buflen > 0) { 1583 for (f = fmt; *f != '%' && *f != 0; ++f) 1584 ; 1585 if (f > fmt) { 1586 len = f - fmt; 1587 if (len > buflen) 1588 len = buflen; 1589 memcpy(buf, fmt, len); 1590 buf += len; 1591 buflen -= len; 1592 fmt = f; 1593 } 1594 if (*fmt == 0) 1595 break; 1596 c = *++fmt; 1597 width = prec = 0; 1598 fillch = ' '; 1599 if (c == '0') { 1600 fillch = '0'; 1601 c = *++fmt; 1602 } 1603 if (c == '*') { 1604 width = va_arg(args, int); 1605 c = *++fmt; 1606 } else { 1607 while (isdigit(c)) { 1608 width = width * 10 + c - '0'; 1609 c = *++fmt; 1610 } 1611 } 1612 if (c == '.') { 1613 c = *++fmt; 1614 if (c == '*') { 1615 prec = va_arg(args, int); 1616 c = *++fmt; 1617 } else { 1618 while (isdigit(c)) { 1619 prec = prec * 10 + c - '0'; 1620 c = *++fmt; 1621 } 1622 } 1623 } 1624 str = 0; 1625 base = 0; 1626 neg = 0; 1627 ++fmt; 1628 switch (c) { 1629 case 'd': 1630 i = va_arg(args, int); 1631 if (i < 0) { 1632 neg = 1; 1633 val = -i; 1634 } else 1635 val = i; 1636 base = 10; 1637 break; 1638 case 'o': 1639 val = va_arg(args, unsigned int); 1640 base = 8; 1641 break; 1642 case 'x': 1643 val = va_arg(args, unsigned int); 1644 base = 16; 1645 break; 1646 case 'p': 1647 val = (unsigned long) va_arg(args, void *); 1648 base = 16; 1649 neg = 2; 1650 break; 1651 case 's': 1652 str = va_arg(args, char *); 1653 break; 1654 case 'c': 1655 num[0] = va_arg(args, int); 1656 num[1] = 0; 1657 str = num; 1658 break; 1659 case 'm': 1660 str = strerror(errno); 1661 break; 1662 case 'v': /* "visible" string */ 1663 case 'q': /* quoted string */ 1664 quoted = c == 'q'; 1665 p = va_arg(args, unsigned char *); 1666 if (fillch == '0' && prec > 0) { 1667 n = prec; 1668 } else { 1669 n = strlen((char *)p); 1670 if (prec > 0 && prec < n) 1671 n = prec; 1672 } 1673 while (n > 0 && buflen > 0) { 1674 c = *p++; 1675 --n; 1676 if (!quoted && c >= 0x80) { 1677 OUTCHAR('M'); 1678 OUTCHAR('-'); 1679 c -= 0x80; 1680 } 1681 if (quoted && (c == '"' || c == '\\')) 1682 OUTCHAR('\\'); 1683 if (c < 0x20 || (0x7f <= c && c < 0xa0)) { 1684 if (quoted) { 1685 OUTCHAR('\\'); 1686 switch (c) { 1687 case '\t': OUTCHAR('t'); break; 1688 case '\n': OUTCHAR('n'); break; 1689 case '\b': OUTCHAR('b'); break; 1690 case '\f': OUTCHAR('f'); break; 1691 default: 1692 OUTCHAR('x'); 1693 OUTCHAR(hexchars[c >> 4]); 1694 OUTCHAR(hexchars[c & 0xf]); 1695 } 1696 } else { 1697 if (c == '\t') 1698 OUTCHAR(c); 1699 else { 1700 OUTCHAR('^'); 1701 OUTCHAR(c ^ 0x40); 1702 } 1703 } 1704 } else 1705 OUTCHAR(c); 1706 } 1707 continue; 1708 default: 1709 *buf++ = '%'; 1710 if (c != '%') 1711 --fmt; /* so %z outputs %z etc. */ 1712 --buflen; 1713 continue; 1714 } 1715 if (base != 0) { 1716 str = num + sizeof(num); 1717 *--str = 0; 1718 while (str > num + neg) { 1719 *--str = hexchars[val % base]; 1720 val = val / base; 1721 if (--prec <= 0 && val == 0) 1722 break; 1723 } 1724 switch (neg) { 1725 case 1: 1726 *--str = '-'; 1727 break; 1728 case 2: 1729 *--str = 'x'; 1730 *--str = '0'; 1731 break; 1732 } 1733 len = num + sizeof(num) - 1 - str; 1734 } else { 1735 len = strlen(str); 1736 if (prec > 0 && len > prec) 1737 len = prec; 1738 } 1739 if (width > 0) { 1740 if (width > buflen) 1741 width = buflen; 1742 if ((n = width - len) > 0) { 1743 buflen -= n; 1744 for (; n > 0; --n) 1745 *buf++ = fillch; 1746 } 1747 } 1748 if (len > buflen) 1749 len = buflen; 1750 memcpy(buf, str, len); 1751 buf += len; 1752 buflen -= len; 1753 } 1754 *buf = 0; 1755 return buf - buf0; 1756 } 1757