1 /* 2 * Copyright (c) 1988, 1990 Regents of the University of California. 3 * All rights reserved. 4 * 5 * %sccs.include.redist.c% 6 */ 7 8 #ifndef lint 9 static char sccsid[] = "@(#)commands.c 5.2 (Berkeley) 09/19/90"; 10 #endif /* not lint */ 11 12 #if defined(unix) 13 #include <sys/param.h> 14 #include <sys/file.h> 15 #else 16 #include <sys/types.h> 17 #endif /* defined(unix) */ 18 19 #include <sys/socket.h> 20 #include <netinet/in.h> 21 #ifdef CRAY 22 #include <sys/fcntl.h> 23 #endif /* CRAY */ 24 25 #include <signal.h> 26 #include <netdb.h> 27 #include <ctype.h> 28 #include <pwd.h> 29 #include <varargs.h> 30 31 #include <arpa/telnet.h> 32 33 #include "general.h" 34 35 #include "ring.h" 36 37 #include "externs.h" 38 #include "defines.h" 39 #include "types.h" 40 41 #ifdef SRCRT 42 # ifndef CRAY 43 # include <netinet/in_systm.h> 44 # endif /* CRAY */ 45 #include <netinet/ip.h> 46 #endif /* SRCRT */ 47 48 #if defined(CRAY) && defined(IP_TOS) && !defined(HAS_IP_TOS) 49 # define HAS_IP_TOS 50 #endif 51 52 53 char *hostname; 54 extern char *getenv(); 55 56 #define Ambiguous(s) ((char **)s == &ambiguous) 57 static char *ambiguous; /* special return value for command routines */ 58 static call(); 59 60 typedef struct { 61 char *name; /* command name */ 62 char *help; /* help string (NULL for no help) */ 63 int (*handler)(); /* routine which executes command */ 64 int needconnect; /* Do we need to be connected to execute? */ 65 } Command; 66 67 static char line[256]; 68 static char saveline[256]; 69 static int margc; 70 static char *margv[20]; 71 72 /* 73 * Various utility routines. 74 */ 75 76 #if !defined(BSD) || (BSD <= 43) 77 78 char *h_errlist[] = { 79 "Error 0", 80 "Unknown host", /* 1 HOST_NOT_FOUND */ 81 "Host name lookup failure", /* 2 TRY_AGAIN */ 82 "Unknown server error", /* 3 NO_RECOVERY */ 83 "No address associated with name", /* 4 NO_ADDRESS */ 84 }; 85 int h_nerr = { sizeof(h_errlist)/sizeof(h_errlist[0]) }; 86 87 int h_errno; /* In some version of SunOS this is necessary */ 88 89 /* 90 * herror -- 91 * print the error indicated by the h_errno value. 92 */ 93 herror(s) 94 char *s; 95 { 96 if (s && *s) { 97 fprintf(stderr, "%s: ", s); 98 } 99 if ((h_errno < 0) || (h_errno >= h_nerr)) { 100 fprintf(stderr, "Unknown error\n"); 101 } else if (h_errno == 0) { 102 #if defined(sun) 103 fprintf(stderr, "Host unknown\n"); 104 #endif /* defined(sun) */ 105 } else { 106 fprintf(stderr, "%s\n", h_errlist[h_errno]); 107 } 108 } 109 #endif /* !define(BSD) || (BSD <= 43) */ 110 111 static void 112 makeargv() 113 { 114 register char *cp, *cp2, c; 115 register char **argp = margv; 116 117 margc = 0; 118 cp = line; 119 if (*cp == '!') { /* Special case shell escape */ 120 strcpy(saveline, line); /* save for shell command */ 121 *argp++ = "!"; /* No room in string to get this */ 122 margc++; 123 cp++; 124 } 125 while (c = *cp) { 126 register int inquote = 0; 127 while (isspace(c)) 128 c = *++cp; 129 if (c == '\0') 130 break; 131 *argp++ = cp; 132 margc += 1; 133 for (cp2 = cp; c != '\0'; c = *++cp) { 134 if (inquote) { 135 if (c == inquote) { 136 inquote = 0; 137 continue; 138 } 139 } else { 140 if (c == '\\') { 141 if ((c = *++cp) == '\0') 142 break; 143 } else if (c == '"') { 144 inquote = '"'; 145 continue; 146 } else if (c == '\'') { 147 inquote = '\''; 148 continue; 149 } else if (isspace(c)) 150 break; 151 } 152 *cp2++ = c; 153 } 154 *cp2 = '\0'; 155 if (c == '\0') 156 break; 157 cp++; 158 } 159 *argp++ = 0; 160 } 161 162 163 static char ** 164 genget(name, table, next) 165 char *name; /* name to match */ 166 char **table; /* name entry in table */ 167 char **(*next)(); /* routine to return next entry in table */ 168 { 169 register char *p, *q; 170 register char **c, **found; 171 register int nmatches, longest; 172 173 if (name == 0) { 174 return 0; 175 } 176 longest = 0; 177 nmatches = 0; 178 found = 0; 179 for (c = table; (p = *c) != 0; c = (*next)(c)) { 180 for (q = name; 181 (*q == *p) || (isupper(*q) && tolower(*q) == *p); p++, q++) 182 if (*q == 0) /* exact match? */ 183 return (c); 184 if (!*q) { /* the name was a prefix */ 185 if (q - name > longest) { 186 longest = q - name; 187 nmatches = 1; 188 found = c; 189 } else if (q - name == longest) 190 nmatches++; 191 } 192 } 193 if (nmatches > 1) 194 return &ambiguous; 195 return (found); 196 } 197 198 /* 199 * Make a character string into a number. 200 * 201 * Todo: 1. Could take random integers (12, 0x12, 012, 0b1). 202 */ 203 204 static 205 special(s) 206 register char *s; 207 { 208 register char c; 209 char b; 210 211 switch (*s) { 212 case '^': 213 b = *++s; 214 if (b == '?') { 215 c = b | 0x40; /* DEL */ 216 } else { 217 c = b & 0x1f; 218 } 219 break; 220 default: 221 c = *s; 222 break; 223 } 224 return c; 225 } 226 227 /* 228 * Construct a control character sequence 229 * for a special character. 230 */ 231 static char * 232 control(c) 233 register cc_t c; 234 { 235 static char buf[5]; 236 237 if (c == 0x7f) 238 return ("^?"); 239 if (c == (cc_t)_POSIX_VDISABLE) { 240 return "off"; 241 } 242 if ((unsigned int)c >= 0x80) { 243 buf[0] = '\\'; 244 buf[1] = ((c>>6)&07) + '0'; 245 buf[2] = ((c>>3)&07) + '0'; 246 buf[3] = (c&07) + '0'; 247 buf[4] = 0; 248 } else if ((unsigned int)c >= 0x20) { 249 buf[0] = c; 250 buf[1] = 0; 251 } else { 252 buf[0] = '^'; 253 buf[1] = '@'+c; 254 buf[2] = 0; 255 } 256 return (buf); 257 } 258 259 260 261 /* 262 * The following are data structures and routines for 263 * the "send" command. 264 * 265 */ 266 267 struct sendlist { 268 char *name; /* How user refers to it (case independent) */ 269 char *help; /* Help information (0 ==> no help) */ 270 #if defined(NOT43) 271 int (*handler)(); /* Routine to perform (for special ops) */ 272 #else /* defined(NOT43) */ 273 void (*handler)(); /* Routine to perform (for special ops) */ 274 #endif /* defined(NOT43) */ 275 int what; /* Character to be sent (<0 ==> special) */ 276 }; 277 278 #define SENDQUESTION -1 279 #define SENDESCAPE -3 280 281 static struct sendlist Sendlist[] = { 282 { "ao", "Send Telnet Abort output", 0, AO }, 283 { "ayt", "Send Telnet 'Are You There'", 0, AYT }, 284 { "brk", "Send Telnet Break", 0, BREAK }, 285 { "ec", "Send Telnet Erase Character", 0, EC }, 286 { "el", "Send Telnet Erase Line", 0, EL }, 287 { "escape", "Send current escape character", 0, SENDESCAPE }, 288 { "ga", "Send Telnet 'Go Ahead' sequence", 0, GA }, 289 { "ip", "Send Telnet Interrupt Process", 0, IP }, 290 { "nop", "Send Telnet 'No operation'", 0, NOP }, 291 { "eor", "Send Telnet 'End of Record'", 0, EOR }, 292 { "abort", "Send Telnet 'Abort Process'", 0, ABORT }, 293 { "susp", "Send Telnet 'Suspend Process'", 0, SUSP }, 294 { "eof", "Send Telnet End of File Character", 0, xEOF }, 295 { "synch", "Perform Telnet 'Synch operation'", dosynch, SYNCH }, 296 { "getstatus", "Send request for STATUS", get_status, 0 }, 297 { "?", "Display send options", 0, SENDQUESTION }, 298 { 0 } 299 }; 300 301 static struct sendlist Sendlist2[] = { /* some synonyms */ 302 { "break", 0, 0, BREAK }, 303 304 { "intp", 0, 0, IP }, 305 { "interrupt", 0, 0, IP }, 306 { "intr", 0, 0, IP }, 307 308 { "help", 0, 0, SENDQUESTION }, 309 310 { 0 } 311 }; 312 313 static char ** 314 getnextsend(name) 315 char *name; 316 { 317 struct sendlist *c = (struct sendlist *) name; 318 319 return (char **) (c+1); 320 } 321 322 static struct sendlist * 323 getsend(name) 324 char *name; 325 { 326 struct sendlist *sl; 327 328 if ((sl = (struct sendlist *) 329 genget(name, (char **) Sendlist, getnextsend)) != 0) { 330 return sl; 331 } else { 332 return (struct sendlist *) 333 genget(name, (char **) Sendlist2, getnextsend); 334 } 335 } 336 337 static 338 sendcmd(argc, argv) 339 int argc; 340 char **argv; 341 { 342 int what; /* what we are sending this time */ 343 int count; /* how many bytes we are going to need to send */ 344 int i; 345 int question = 0; /* was at least one argument a question */ 346 struct sendlist *s; /* pointer to current command */ 347 348 if (argc < 2) { 349 printf("need at least one argument for 'send' command\n"); 350 printf("'send ?' for help\n"); 351 return 0; 352 } 353 /* 354 * First, validate all the send arguments. 355 * In addition, we see how much space we are going to need, and 356 * whether or not we will be doing a "SYNCH" operation (which 357 * flushes the network queue). 358 */ 359 count = 0; 360 for (i = 1; i < argc; i++) { 361 s = getsend(argv[i]); 362 if (s == 0) { 363 printf("Unknown send argument '%s'\n'send ?' for help.\n", 364 argv[i]); 365 return 0; 366 } else if (Ambiguous(s)) { 367 printf("Ambiguous send argument '%s'\n'send ?' for help.\n", 368 argv[i]); 369 return 0; 370 } 371 switch (s->what) { 372 case SENDQUESTION: 373 question = 1; 374 break; 375 case SENDESCAPE: 376 count += 1; 377 break; 378 case SYNCH: 379 count += 2; 380 break; 381 default: 382 count += 2; 383 break; 384 } 385 } 386 if (!connected) { 387 if (count) 388 printf("?Need to be connected first.\n"); 389 if (question) { 390 for (s = Sendlist; s->name; s++) 391 if (s->help) 392 printf("%-15s %s\n", s->name, s->help); 393 } else 394 printf("'send ?' for help\n"); 395 return !question; 396 } 397 /* Now, do we have enough room? */ 398 if (NETROOM() < count) { 399 printf("There is not enough room in the buffer TO the network\n"); 400 printf("to process your request. Nothing will be done.\n"); 401 printf("('send synch' will throw away most data in the network\n"); 402 printf("buffer, if this might help.)\n"); 403 return 0; 404 } 405 /* OK, they are all OK, now go through again and actually send */ 406 for (i = 1; i < argc; i++) { 407 if ((s = getsend(argv[i])) == 0) { 408 fprintf(stderr, "Telnet 'send' error - argument disappeared!\n"); 409 (void) quit(); 410 /*NOTREACHED*/ 411 } 412 if (s->handler) { 413 (*s->handler)(s); 414 } else { 415 switch (what = s->what) { 416 case SYNCH: 417 dosynch(); 418 break; 419 case SENDQUESTION: 420 for (s = Sendlist; s->name; s++) { 421 if (s->help) 422 printf("%-15s %s\n", s->name, s->help); 423 } 424 question = 1; 425 break; 426 case SENDESCAPE: 427 NETADD(escape); 428 break; 429 default: 430 NET2ADD(IAC, what); 431 printoption("SENT", "IAC", what); 432 break; 433 } 434 } 435 } 436 return !question; 437 } 438 439 /* 440 * The following are the routines and data structures referred 441 * to by the arguments to the "toggle" command. 442 */ 443 444 static 445 lclchars() 446 { 447 donelclchars = 1; 448 return 1; 449 } 450 451 static 452 togdebug() 453 { 454 #ifndef NOT43 455 if (net > 0 && 456 (SetSockOpt(net, SOL_SOCKET, SO_DEBUG, debug)) < 0) { 457 perror("setsockopt (SO_DEBUG)"); 458 } 459 #else /* NOT43 */ 460 if (debug) { 461 if (net > 0 && SetSockOpt(net, SOL_SOCKET, SO_DEBUG, 0, 0) < 0) 462 perror("setsockopt (SO_DEBUG)"); 463 } else 464 printf("Cannot turn off socket debugging\n"); 465 #endif /* NOT43 */ 466 return 1; 467 } 468 469 470 static int 471 togcrlf() 472 { 473 if (crlf) { 474 printf("Will send carriage returns as telnet <CR><LF>.\n"); 475 } else { 476 printf("Will send carriage returns as telnet <CR><NUL>.\n"); 477 } 478 return 1; 479 } 480 481 int binmode; 482 483 static int 484 togbinary(val) 485 int val; 486 { 487 donebinarytoggle = 1; 488 489 if (val >= 0) { 490 binmode = val; 491 } else { 492 if (my_want_state_is_will(TELOPT_BINARY) && 493 my_want_state_is_do(TELOPT_BINARY)) { 494 binmode = 1; 495 } else if (my_want_state_is_wont(TELOPT_BINARY) && 496 my_want_state_is_dont(TELOPT_BINARY)) { 497 binmode = 0; 498 } 499 val = binmode ? 0 : 1; 500 } 501 502 if (val == 1) { 503 if (my_want_state_is_will(TELOPT_BINARY) && 504 my_want_state_is_do(TELOPT_BINARY)) { 505 printf("Already operating in binary mode with remote host.\n"); 506 } else { 507 printf("Negotiating binary mode with remote host.\n"); 508 tel_enter_binary(3); 509 } 510 } else { 511 if (my_want_state_is_wont(TELOPT_BINARY) && 512 my_want_state_is_dont(TELOPT_BINARY)) { 513 printf("Already in network ascii mode with remote host.\n"); 514 } else { 515 printf("Negotiating network ascii mode with remote host.\n"); 516 tel_leave_binary(3); 517 } 518 } 519 return 1; 520 } 521 522 static int 523 togrbinary(val) 524 int val; 525 { 526 donebinarytoggle = 1; 527 528 if (val == -1) 529 val = my_want_state_is_do(TELOPT_BINARY) ? 0 : 1; 530 531 if (val == 1) { 532 if (my_want_state_is_do(TELOPT_BINARY)) { 533 printf("Already receiving in binary mode.\n"); 534 } else { 535 printf("Negotiating binary mode on input.\n"); 536 tel_enter_binary(1); 537 } 538 } else { 539 if (my_want_state_is_dont(TELOPT_BINARY)) { 540 printf("Already receiving in network ascii mode.\n"); 541 } else { 542 printf("Negotiating network ascii mode on input.\n"); 543 tel_leave_binary(1); 544 } 545 } 546 return 1; 547 } 548 549 static int 550 togxbinary(val) 551 int val; 552 { 553 donebinarytoggle = 1; 554 555 if (val == -1) 556 val = my_want_state_is_will(TELOPT_BINARY) ? 0 : 1; 557 558 if (val == 1) { 559 if (my_want_state_is_will(TELOPT_BINARY)) { 560 printf("Already transmitting in binary mode.\n"); 561 } else { 562 printf("Negotiating binary mode on output.\n"); 563 tel_enter_binary(2); 564 } 565 } else { 566 if (my_want_state_is_wont(TELOPT_BINARY)) { 567 printf("Already transmitting in network ascii mode.\n"); 568 } else { 569 printf("Negotiating network ascii mode on output.\n"); 570 tel_leave_binary(2); 571 } 572 } 573 return 1; 574 } 575 576 577 extern int togglehelp(); 578 extern int slc_check(); 579 580 struct togglelist { 581 char *name; /* name of toggle */ 582 char *help; /* help message */ 583 int (*handler)(); /* routine to do actual setting */ 584 int *variable; 585 char *actionexplanation; 586 }; 587 588 static struct togglelist Togglelist[] = { 589 { "autoflush", 590 "flushing of output when sending interrupt characters", 591 0, 592 &autoflush, 593 "flush output when sending interrupt characters" }, 594 { "autosynch", 595 "automatic sending of interrupt characters in urgent mode", 596 0, 597 &autosynch, 598 "send interrupt characters in urgent mode" }, 599 { "binary", 600 "sending and receiving of binary data", 601 togbinary, 602 0, 603 0 }, 604 { "inbinary", 605 "receiving of binary data", 606 togrbinary, 607 0, 608 0 }, 609 { "outbinary", 610 "sending of binary data", 611 togxbinary, 612 0, 613 0 }, 614 { "crlf", 615 "sending carriage returns as telnet <CR><LF>", 616 togcrlf, 617 &crlf, 618 0 }, 619 { "crmod", 620 "mapping of received carriage returns", 621 0, 622 &crmod, 623 "map carriage return on output" }, 624 { "localchars", 625 "local recognition of certain control characters", 626 lclchars, 627 &localchars, 628 "recognize certain control characters" }, 629 #ifdef KERBEROS 630 { "kerberos", 631 "toggle use of Kerberos authentication", 632 0, 633 &kerberized, 634 "use Kerberos authentication" }, 635 #endif 636 { " ", "", 0 }, /* empty line */ 637 #if defined(unix) && defined(TN3270) 638 { "apitrace", 639 "(debugging) toggle tracing of API transactions", 640 0, 641 &apitrace, 642 "trace API transactions" }, 643 { "cursesdata", 644 "(debugging) toggle printing of hexadecimal curses data", 645 0, 646 &cursesdata, 647 "print hexadecimal representation of curses data" }, 648 #endif /* defined(unix) && defined(TN3270) */ 649 { "debug", 650 "debugging", 651 togdebug, 652 &debug, 653 "turn on socket level debugging" }, 654 { "netdata", 655 "printing of hexadecimal network data (debugging)", 656 0, 657 &netdata, 658 "print hexadecimal representation of network traffic" }, 659 { "prettydump", 660 "output of \"netdata\" to user readable format (debugging)", 661 0, 662 &prettydump, 663 "print user readable output for \"netdata\"" }, 664 { "options", 665 "viewing of options processing (debugging)", 666 0, 667 &showoptions, 668 "show option processing" }, 669 #if defined(unix) 670 { "termdata", 671 "(debugging) toggle printing of hexadecimal terminal data", 672 0, 673 &termdata, 674 "print hexadecimal representation of terminal traffic" }, 675 #endif /* defined(unix) */ 676 { "?", 677 0, 678 togglehelp }, 679 { "help", 680 0, 681 togglehelp }, 682 { 0 } 683 }; 684 685 static 686 togglehelp() 687 { 688 struct togglelist *c; 689 690 for (c = Togglelist; c->name; c++) { 691 if (c->help) { 692 if (*c->help) 693 printf("%-15s toggle %s\n", c->name, c->help); 694 else 695 printf("\n"); 696 } 697 } 698 printf("\n"); 699 printf("%-15s %s\n", "?", "display help information"); 700 return 0; 701 } 702 703 static 704 settogglehelp(set) 705 int set; 706 { 707 struct togglelist *c; 708 709 for (c = Togglelist; c->name; c++) { 710 if (c->help) { 711 if (*c->help) 712 printf("%-15s %s %s\n", c->name, set ? "enable" : "disable", 713 c->help); 714 else 715 printf("\n"); 716 } 717 } 718 } 719 720 static char ** 721 getnexttoggle(name) 722 char *name; 723 { 724 struct togglelist *c = (struct togglelist *) name; 725 726 return (char **) (c+1); 727 } 728 729 static struct togglelist * 730 gettoggle(name) 731 char *name; 732 { 733 return (struct togglelist *) 734 genget(name, (char **) Togglelist, getnexttoggle); 735 } 736 737 static 738 toggle(argc, argv) 739 int argc; 740 char *argv[]; 741 { 742 int retval = 1; 743 char *name; 744 struct togglelist *c; 745 746 if (argc < 2) { 747 fprintf(stderr, 748 "Need an argument to 'toggle' command. 'toggle ?' for help.\n"); 749 return 0; 750 } 751 argc--; 752 argv++; 753 while (argc--) { 754 name = *argv++; 755 c = gettoggle(name); 756 if (Ambiguous(c)) { 757 fprintf(stderr, "'%s': ambiguous argument ('toggle ?' for help).\n", 758 name); 759 return 0; 760 } else if (c == 0) { 761 fprintf(stderr, "'%s': unknown argument ('toggle ?' for help).\n", 762 name); 763 return 0; 764 } else { 765 if (c->variable) { 766 *c->variable = !*c->variable; /* invert it */ 767 if (c->actionexplanation) { 768 printf("%s %s.\n", *c->variable? "Will" : "Won't", 769 c->actionexplanation); 770 } 771 } 772 if (c->handler) { 773 retval &= (*c->handler)(-1); 774 } 775 } 776 } 777 return retval; 778 } 779 780 /* 781 * The following perform the "set" command. 782 */ 783 784 #ifdef USE_TERMIO 785 struct termio new_tc = { 0 }; 786 #endif 787 788 struct setlist { 789 char *name; /* name */ 790 char *help; /* help information */ 791 void (*handler)(); 792 cc_t *charp; /* where it is located at */ 793 }; 794 795 static struct setlist Setlist[] = { 796 #ifdef KLUDGELINEMODE 797 { "echo", "character to toggle local echoing on/off", 0, &echoc }, 798 #endif 799 { "escape", "character to escape back to telnet command mode", 0, &escape }, 800 { "tracefile", "file to write trace information to", SetNetTrace, (cc_t *)NetTraceFile}, 801 { " ", "" }, 802 { " ", "The following need 'localchars' to be toggled true", 0, 0 }, 803 { "flushoutput", "character to cause an Abort Output", 0, termFlushCharp }, 804 { "interrupt", "character to cause an Interrupt Process", 0, termIntCharp }, 805 { "quit", "character to cause an Abort process", 0, termQuitCharp }, 806 { "eof", "character to cause an EOF ", 0, termEofCharp }, 807 { " ", "" }, 808 { " ", "The following are for local editing in linemode", 0, 0 }, 809 { "erase", "character to use to erase a character", 0, termEraseCharp }, 810 { "kill", "character to use to erase a line", 0, termKillCharp }, 811 { "lnext", "character to use for literal next", 0, termLiteralNextCharp }, 812 { "susp", "character to cause a Suspend Process", 0, termSuspCharp }, 813 { "reprint", "character to use for line reprint", 0, termRprntCharp }, 814 { "worderase", "character to use to erase a word", 0, termWerasCharp }, 815 { "start", "character to use for XON", 0, termStartCharp }, 816 { "stop", "character to use for XOFF", 0, termStopCharp }, 817 { "forw1", "alternate end of line character", 0, termForw1Charp }, 818 { "forw2", "alternate end of line character", 0, termForw2Charp }, 819 { "ayt", "alternate AYT character", 0, termAytCharp }, 820 { 0 } 821 }; 822 823 #if defined(CRAY) && !defined(__STDC__) 824 /* Work around compiler bug in pcc 4.1.5 */ 825 _setlist_init() 826 { 827 #ifndef KLUDGELINEMODE 828 #define N 4 829 #else 830 #define N 5 831 #endif 832 Setlist[N+0].charp = &termFlushChar; 833 Setlist[N+1].charp = &termIntChar; 834 Setlist[N+2].charp = &termQuitChar; 835 Setlist[N+3].charp = &termEofChar; 836 Setlist[N+6].charp = &termEraseChar; 837 Setlist[N+7].charp = &termKillChar; 838 Setlist[N+8].charp = &termLiteralNextChar; 839 Setlist[N+9].charp = &termSuspChar; 840 Setlist[N+10].charp = &termRprntChar; 841 Setlist[N+11].charp = &termWerasChar; 842 Setlist[N+12].charp = &termStartChar; 843 Setlist[N+13].charp = &termStopChar; 844 Setlist[N+14].charp = &termForw1Char; 845 Setlist[N+15].charp = &termForw2Char; 846 Setlist[N+16].charp = &termAytChar; 847 #undef N 848 } 849 #endif /* defined(CRAY) && !defined(__STDC__) */ 850 851 static char ** 852 getnextset(name) 853 char *name; 854 { 855 struct setlist *c = (struct setlist *)name; 856 857 return (char **) (c+1); 858 } 859 860 static struct setlist * 861 getset(name) 862 char *name; 863 { 864 return (struct setlist *) genget(name, (char **) Setlist, getnextset); 865 } 866 867 set_escape_char(s) 868 char *s; 869 { 870 escape = (s && *s) ? special(s) : _POSIX_VDISABLE; 871 printf("escape character is '%s'.\n", control(escape)); 872 } 873 874 static 875 setcmd(argc, argv) 876 int argc; 877 char *argv[]; 878 { 879 int value; 880 struct setlist *ct; 881 struct togglelist *c; 882 883 if (argc < 2 || argc > 3) { 884 printf("Format is 'set Name Value'\n'set ?' for help.\n"); 885 return 0; 886 } 887 if ((argc == 2) && 888 ((!strcmp(argv[1], "?")) || (!strcmp(argv[1], "help")))) { 889 for (ct = Setlist; ct->name; ct++) 890 printf("%-15s %s\n", ct->name, ct->help); 891 printf("\n"); 892 settogglehelp(1); 893 printf("%-15s %s\n", "?", "display help information"); 894 return 0; 895 } 896 897 ct = getset(argv[1]); 898 if (ct == 0) { 899 c = gettoggle(argv[1]); 900 if (c == 0) { 901 fprintf(stderr, "'%s': unknown argument ('set ?' for help).\n", 902 argv[1]); 903 return 0; 904 } else if (Ambiguous(c)) { 905 fprintf(stderr, "'%s': ambiguous argument ('set ?' for help).\n", 906 argv[1]); 907 return 0; 908 } 909 if (c->variable) { 910 if ((argc == 2) || (strcmp("on", argv[2]) == 0)) 911 *c->variable = 1; 912 else if (strcmp("off", argv[2]) == 0) 913 *c->variable = 0; 914 else { 915 printf("Format is 'set togglename [on|off]'\n'set ?' for help.\n"); 916 return 0; 917 } 918 if (c->actionexplanation) { 919 printf("%s %s.\n", *c->variable? "Will" : "Won't", 920 c->actionexplanation); 921 } 922 } 923 if (c->handler) 924 (*c->handler)(1); 925 } else if (argc != 3) { 926 printf("Format is 'set Name Value'\n'set ?' for help.\n"); 927 return 0; 928 } else if (Ambiguous(ct)) { 929 fprintf(stderr, "'%s': ambiguous argument ('set ?' for help).\n", 930 argv[1]); 931 return 0; 932 } else if (ct->handler) { 933 (*ct->handler)(argv[2]); 934 printf("%s set to \"%s\".\n", ct->name, (char *)ct->charp); 935 } else { 936 if (strcmp("off", argv[2])) { 937 value = special(argv[2]); 938 } else { 939 value = _POSIX_VDISABLE; 940 } 941 *(ct->charp) = (cc_t)value; 942 printf("%s character is '%s'.\n", ct->name, control(*(ct->charp))); 943 } 944 slc_check(); 945 return 1; 946 } 947 948 static 949 unsetcmd(argc, argv) 950 int argc; 951 char *argv[]; 952 { 953 struct setlist *ct; 954 struct togglelist *c; 955 register char *name; 956 957 if (argc < 2) { 958 fprintf(stderr, 959 "Need an argument to 'unset' command. 'unset ?' for help.\n"); 960 return 0; 961 } 962 if ((!strcmp(argv[1], "?")) || (!strcmp(argv[1], "help"))) { 963 for (ct = Setlist; ct->name; ct++) 964 printf("%-15s %s\n", ct->name, ct->help); 965 printf("\n"); 966 settogglehelp(0); 967 printf("%-15s %s\n", "?", "display help information"); 968 return 0; 969 } 970 971 argc--; 972 argv++; 973 while (argc--) { 974 name = *argv++; 975 ct = getset(name); 976 if (ct == 0) { 977 c = gettoggle(name); 978 if (c == 0) { 979 fprintf(stderr, "'%s': unknown argument ('unset ?' for help).\n", 980 name); 981 return 0; 982 } else if (Ambiguous(c)) { 983 fprintf(stderr, "'%s': ambiguous argument ('unset ?' for help).\n", 984 name); 985 return 0; 986 } 987 if (c->variable) { 988 *c->variable = 0; 989 if (c->actionexplanation) { 990 printf("%s %s.\n", *c->variable? "Will" : "Won't", 991 c->actionexplanation); 992 } 993 } 994 if (c->handler) 995 (*c->handler)(0); 996 } else if (Ambiguous(ct)) { 997 fprintf(stderr, "'%s': ambiguous argument ('unset ?' for help).\n", 998 name); 999 return 0; 1000 } else if (ct->handler) { 1001 (*ct->handler)(0); 1002 printf("%s reset to \"%s\".\n", ct->name, (char *)ct->charp); 1003 } else { 1004 *(ct->charp) = _POSIX_VDISABLE; 1005 printf("%s character is '%s'.\n", ct->name, control(*(ct->charp))); 1006 } 1007 } 1008 return 1; 1009 } 1010 1011 /* 1012 * The following are the data structures and routines for the 1013 * 'mode' command. 1014 */ 1015 #ifdef KLUDGELINEMODE 1016 extern int kludgelinemode; 1017 1018 dokludgemode() 1019 { 1020 kludgelinemode = 1; 1021 send_wont(TELOPT_LINEMODE, 1); 1022 send_dont(TELOPT_SGA, 1); 1023 send_dont(TELOPT_ECHO, 1); 1024 } 1025 #endif 1026 1027 static 1028 dolinemode() 1029 { 1030 #ifdef KLUDGELINEMODE 1031 if (kludgelinemode) 1032 send_dont(TELOPT_SGA, 1); 1033 #endif 1034 send_will(TELOPT_LINEMODE, 1); 1035 send_dont(TELOPT_ECHO, 1); 1036 return 1; 1037 } 1038 1039 static 1040 docharmode() 1041 { 1042 #ifdef KLUDGELINEMODE 1043 if (kludgelinemode) 1044 send_do(TELOPT_SGA, 1); 1045 else 1046 #endif 1047 send_wont(TELOPT_LINEMODE, 1); 1048 send_do(TELOPT_ECHO, 1); 1049 return 1; 1050 } 1051 1052 setmode(bit) 1053 { 1054 return dolmmode(bit, 1); 1055 } 1056 1057 clearmode(bit) 1058 { 1059 return dolmmode(bit, 0); 1060 } 1061 1062 dolmmode(bit, on) 1063 int bit, on; 1064 { 1065 char c; 1066 extern int linemode; 1067 1068 if (my_want_state_is_wont(TELOPT_LINEMODE)) { 1069 printf("?Need to have LINEMODE option enabled first.\n"); 1070 printf("'mode ?' for help.\n"); 1071 return 0; 1072 } 1073 1074 if (on) 1075 c = (linemode | bit); 1076 else 1077 c = (linemode & ~bit); 1078 lm_mode(&c, 1, 1); 1079 return 1; 1080 } 1081 1082 struct modelist { 1083 char *name; /* command name */ 1084 char *help; /* help string */ 1085 int (*handler)(); /* routine which executes command */ 1086 int needconnect; /* Do we need to be connected to execute? */ 1087 int arg1; 1088 }; 1089 1090 extern int modehelp(); 1091 1092 static struct modelist ModeList[] = { 1093 { "character", "Disable LINEMODE option", docharmode, 1 }, 1094 #ifdef KLUDGELINEMODE 1095 { "", "(or disable obsolete line-by-line mode)", 0 }, 1096 #endif 1097 { "line", "Enable LINEMODE option", dolinemode, 1 }, 1098 #ifdef KLUDGELINEMODE 1099 { "", "(or enable obsolete line-by-line mode)", 0 }, 1100 #endif 1101 { "", "", 0 }, 1102 { "", "These require the LINEMODE option to be enabled", 0 }, 1103 { "isig", "Enable signal trapping", setmode, 1, MODE_TRAPSIG }, 1104 { "+isig", 0, setmode, 1, MODE_TRAPSIG }, 1105 { "-isig", "Disable signal trapping", clearmode, 1, MODE_TRAPSIG }, 1106 { "edit", "Enable character editing", setmode, 1, MODE_EDIT }, 1107 { "+edit", 0, setmode, 1, MODE_EDIT }, 1108 { "-edit", "Disable character editing", clearmode, 1, MODE_EDIT }, 1109 { "softtabs", "Enable tab expansion", setmode, 1, MODE_SOFT_TAB }, 1110 { "+softtabs", 0, setmode, 1, MODE_SOFT_TAB }, 1111 { "-softtabs", "Disable character editing", clearmode, 1, MODE_SOFT_TAB }, 1112 { "litecho", "Enable literal character echo", setmode, 1, MODE_LIT_ECHO }, 1113 { "+litecho", 0, setmode, 1, MODE_LIT_ECHO }, 1114 { "-litecho", "Disable literal character echo", clearmode, 1, MODE_LIT_ECHO }, 1115 { "help", 0, modehelp, 0 }, 1116 #ifdef KLUDGELINEMODE 1117 { "kludgeline", 0, dokludgemode, 1 }, 1118 #endif 1119 { "", "", 0 }, 1120 { "?", "Print help information", modehelp, 0 }, 1121 { 0 }, 1122 }; 1123 1124 static char ** 1125 getnextmode(name) 1126 char *name; 1127 { 1128 return (char **) (((struct modelist *)name)+1); 1129 } 1130 1131 static struct modelist * 1132 getmodecmd(name) 1133 char *name; 1134 { 1135 return (struct modelist *) genget(name, (char **) ModeList, getnextmode); 1136 } 1137 1138 modehelp() 1139 { 1140 struct modelist *mt; 1141 1142 printf("format is: 'mode Mode', where 'Mode' is one of:\n\n"); 1143 for (mt = ModeList; mt->name; mt++) { 1144 if (mt->help) { 1145 if (*mt->help) 1146 printf("%-15s %s\n", mt->name, mt->help); 1147 else 1148 printf("\n"); 1149 } 1150 } 1151 return 0; 1152 } 1153 1154 static 1155 modecmd(argc, argv) 1156 int argc; 1157 char *argv[]; 1158 { 1159 struct modelist *mt; 1160 1161 if (argc != 2) { 1162 printf("'mode' command requires an argument\n"); 1163 printf("'mode ?' for help.\n"); 1164 } else if ((mt = getmodecmd(argv[1])) == 0) { 1165 fprintf(stderr, "Unknown mode '%s' ('mode ?' for help).\n", argv[1]); 1166 } else if (Ambiguous(mt)) { 1167 fprintf(stderr, "Ambiguous mode '%s' ('mode ?' for help).\n", argv[1]); 1168 } else if (mt->needconnect && !connected) { 1169 printf("?Need to be connected first.\n"); 1170 printf("'mode ?' for help.\n"); 1171 } else if (mt->handler) { 1172 return (*mt->handler)(mt->arg1); 1173 } 1174 return 0; 1175 } 1176 1177 /* 1178 * The following data structures and routines implement the 1179 * "display" command. 1180 */ 1181 1182 static 1183 display(argc, argv) 1184 int argc; 1185 char *argv[]; 1186 { 1187 #define dotog(tl) if (tl->variable && tl->actionexplanation) { \ 1188 if (*tl->variable) { \ 1189 printf("will"); \ 1190 } else { \ 1191 printf("won't"); \ 1192 } \ 1193 printf(" %s.\n", tl->actionexplanation); \ 1194 } 1195 1196 #define doset(sl) if (sl->name && *sl->name != ' ') { \ 1197 if (sl->handler == 0) \ 1198 printf("%-15s [%s]\n", sl->name, control(*sl->charp)); \ 1199 else \ 1200 printf("%-15s \"%s\"\n", sl->name, (char *)sl->charp); \ 1201 } 1202 1203 struct togglelist *tl; 1204 struct setlist *sl; 1205 1206 if (argc == 1) { 1207 for (tl = Togglelist; tl->name; tl++) { 1208 dotog(tl); 1209 } 1210 printf("\n"); 1211 for (sl = Setlist; sl->name; sl++) { 1212 doset(sl); 1213 } 1214 } else { 1215 int i; 1216 1217 for (i = 1; i < argc; i++) { 1218 sl = getset(argv[i]); 1219 tl = gettoggle(argv[i]); 1220 if (Ambiguous(sl) || Ambiguous(tl)) { 1221 printf("?Ambiguous argument '%s'.\n", argv[i]); 1222 return 0; 1223 } else if (!sl && !tl) { 1224 printf("?Unknown argument '%s'.\n", argv[i]); 1225 return 0; 1226 } else { 1227 if (tl) { 1228 dotog(tl); 1229 } 1230 if (sl) { 1231 doset(sl); 1232 } 1233 } 1234 } 1235 } 1236 /*@*/optionstatus(); 1237 return 1; 1238 #undef doset 1239 #undef dotog 1240 } 1241 1242 /* 1243 * The following are the data structures, and many of the routines, 1244 * relating to command processing. 1245 */ 1246 1247 /* 1248 * Set the escape character. 1249 */ 1250 static 1251 setescape(argc, argv) 1252 int argc; 1253 char *argv[]; 1254 { 1255 register char *arg; 1256 char buf[50]; 1257 1258 printf( 1259 "Deprecated usage - please use 'set escape%s%s' in the future.\n", 1260 (argc > 2)? " ":"", (argc > 2)? argv[1]: ""); 1261 if (argc > 2) 1262 arg = argv[1]; 1263 else { 1264 printf("new escape character: "); 1265 (void) gets(buf); 1266 arg = buf; 1267 } 1268 if (arg[0] != '\0') 1269 escape = arg[0]; 1270 if (!In3270) { 1271 printf("Escape character is '%s'.\n", control(escape)); 1272 } 1273 (void) fflush(stdout); 1274 return 1; 1275 } 1276 1277 /*VARARGS*/ 1278 static 1279 togcrmod() 1280 { 1281 crmod = !crmod; 1282 printf("Deprecated usage - please use 'toggle crmod' in the future.\n"); 1283 printf("%s map carriage return on output.\n", crmod ? "Will" : "Won't"); 1284 (void) fflush(stdout); 1285 return 1; 1286 } 1287 1288 /*VARARGS*/ 1289 suspend() 1290 { 1291 #ifdef SIGTSTP 1292 setcommandmode(); 1293 { 1294 long oldrows, oldcols, newrows, newcols, err; 1295 1296 err = TerminalWindowSize(&oldrows, &oldcols); 1297 (void) kill(0, SIGTSTP); 1298 err += TerminalWindowSize(&newrows, &newcols); 1299 if (connected && !err && 1300 ((oldrows != newrows) || (oldcols != newcols))) { 1301 sendnaws(); 1302 } 1303 } 1304 /* reget parameters in case they were changed */ 1305 TerminalSaveState(); 1306 setconnmode(0); 1307 #else 1308 printf("Suspend is not supported. Try the '!' command instead\n"); 1309 #endif 1310 return 1; 1311 } 1312 1313 #if !defined(TN3270) 1314 /*ARGSUSED*/ 1315 shell(argc, argv) 1316 int argc; 1317 char *argv[]; 1318 { 1319 extern char *rindex(); 1320 1321 setcommandmode(); 1322 switch(vfork()) { 1323 case -1: 1324 perror("Fork failed\n"); 1325 break; 1326 1327 case 0: 1328 { 1329 /* 1330 * Fire up the shell in the child. 1331 */ 1332 register char *shell, *shellname; 1333 1334 shell = getenv("SHELL"); 1335 if (shell == NULL) 1336 shell = "/bin/sh"; 1337 if ((shellname = rindex(shell, '/')) == 0) 1338 shellname = shell; 1339 else 1340 shellname++; 1341 if (argc > 1) 1342 execl(shell, shellname, "-c", &saveline[1], 0); 1343 else 1344 execl(shell, shellname, 0); 1345 perror("Execl"); 1346 _exit(1); 1347 } 1348 default: 1349 (void)wait((int *)0); /* Wait for the shell to complete */ 1350 } 1351 } 1352 #endif /* !defined(TN3270) */ 1353 1354 /*VARARGS*/ 1355 static 1356 bye(argc, argv) 1357 int argc; /* Number of arguments */ 1358 char *argv[]; /* arguments */ 1359 { 1360 if (connected) { 1361 (void) shutdown(net, 2); 1362 printf("Connection closed.\n"); 1363 (void) NetClose(net); 1364 connected = 0; 1365 /* reset options */ 1366 tninit(); 1367 #if defined(TN3270) 1368 SetIn3270(); /* Get out of 3270 mode */ 1369 #endif /* defined(TN3270) */ 1370 } 1371 if ((argc != 2) || (strcmp(argv[1], "fromquit") != 0)) { 1372 longjmp(toplevel, 1); 1373 /* NOTREACHED */ 1374 } 1375 return 1; /* Keep lint, etc., happy */ 1376 } 1377 1378 /*VARARGS*/ 1379 quit() 1380 { 1381 (void) call(bye, "bye", "fromquit", 0); 1382 Exit(0); 1383 /*NOTREACHED*/ 1384 } 1385 1386 /* 1387 * The SLC command. 1388 */ 1389 1390 struct slclist { 1391 char *name; 1392 char *help; 1393 int (*handler)(); 1394 int arg; 1395 }; 1396 1397 extern int slc_help(); 1398 extern int slc_mode_export(), slc_mode_import(), slcstate(); 1399 1400 struct slclist SlcList[] = { 1401 { "export", "Use local special character definitions", 1402 slc_mode_export, 0 }, 1403 { "import", "Use remote special character definitions", 1404 slc_mode_import, 1 }, 1405 { "check", "Verify remote special character definitions", 1406 slc_mode_import, 0 }, 1407 { "help", 0, slc_help, 0 }, 1408 { "?", "Print help information", slc_help, 0 }, 1409 { 0 }, 1410 }; 1411 1412 static 1413 slc_help() 1414 { 1415 struct slclist *c; 1416 1417 for (c = SlcList; c->name; c++) { 1418 if (c->help) { 1419 if (*c->help) 1420 printf("%-15s %s\n", c->name, c->help); 1421 else 1422 printf("\n"); 1423 } 1424 } 1425 } 1426 1427 static char ** 1428 getnextslc(name) 1429 char *name; 1430 { 1431 return (char **)(((struct slclist *)name)+1); 1432 } 1433 1434 static struct slclist * 1435 getslc(name) 1436 char *name; 1437 { 1438 return (struct slclist *)genget(name, (char **) SlcList, getnextslc); 1439 } 1440 1441 static 1442 slccmd(argc, argv) 1443 int argc; 1444 char *argv[]; 1445 { 1446 struct slclist *c; 1447 1448 if (argc != 2) { 1449 fprintf(stderr, 1450 "Need an argument to 'slc' command. 'slc ?' for help.\n"); 1451 return 0; 1452 } 1453 c = getslc(argv[1]); 1454 if (c == 0) { 1455 fprintf(stderr, "'%s': unknown argument ('slc ?' for help).\n", 1456 argv[1]); 1457 return 0; 1458 } 1459 if (Ambiguous(c)) { 1460 fprintf(stderr, "'%s': ambiguous argument ('slc ?' for help).\n", 1461 argv[1]); 1462 return 0; 1463 } 1464 (*c->handler)(c->arg); 1465 slcstate(); 1466 return 1; 1467 } 1468 1469 /* 1470 * The ENVIRON command. 1471 */ 1472 1473 struct envlist { 1474 char *name; 1475 char *help; 1476 int (*handler)(); 1477 int narg; 1478 }; 1479 1480 extern struct env_lst *env_define(); 1481 extern int env_undefine(); 1482 extern int env_export(), env_unexport(); 1483 extern int env_send(), env_list(), env_help(); 1484 1485 struct envlist EnvList[] = { 1486 { "define", "Define an environment variable", 1487 (int (*)())env_define, 2 }, 1488 { "undefine", "Undefine an environment variable", 1489 env_undefine, 1 }, 1490 { "export", "Mark an environment variable for automatic export", 1491 env_export, 1 }, 1492 { "unexport", "Dont mark an environment variable for automatic export", 1493 env_unexport, 1 }, 1494 { "send", "Send an environment variable", env_send, 1 }, 1495 { "list", "List the current environment variables", 1496 env_list, 0 }, 1497 { "help", 0, env_help, 0 }, 1498 { "?", "Print help information", env_help, 0 }, 1499 { 0 }, 1500 }; 1501 1502 static 1503 env_help() 1504 { 1505 struct envlist *c; 1506 1507 for (c = EnvList; c->name; c++) { 1508 if (c->help) { 1509 if (*c->help) 1510 printf("%-15s %s\n", c->name, c->help); 1511 else 1512 printf("\n"); 1513 } 1514 } 1515 } 1516 1517 static char ** 1518 getnextenv(name) 1519 char *name; 1520 { 1521 return (char **)(((struct envlist *)name)+1); 1522 } 1523 1524 static struct envlist * 1525 getenvcmd(name) 1526 char *name; 1527 { 1528 return (struct envlist *)genget(name, (char **) EnvList, getnextenv); 1529 } 1530 1531 env_cmd(argc, argv) 1532 int argc; 1533 char *argv[]; 1534 { 1535 struct envlist *c; 1536 1537 if (argc < 2) { 1538 fprintf(stderr, 1539 "Need an argument to 'environ' command. 'environ ?' for help.\n"); 1540 return 0; 1541 } 1542 c = getenvcmd(argv[1]); 1543 if (c == 0) { 1544 fprintf(stderr, "'%s': unknown argument ('environ ?' for help).\n", 1545 argv[1]); 1546 return 0; 1547 } 1548 if (Ambiguous(c)) { 1549 fprintf(stderr, "'%s': ambiguous argument ('environ ?' for help).\n", 1550 argv[1]); 1551 return 0; 1552 } 1553 if (c->narg + 2 != argc) { 1554 fprintf(stderr, 1555 "Need %s%d argument%s to 'environ %s' command. 'environ ?' for help.\n", 1556 c->narg < argc + 2 ? "only " : "", 1557 c->narg, c->narg == 1 ? "" : "s", c->name); 1558 return 0; 1559 } 1560 (void)(*c->handler)(argv[2], argv[3]); 1561 return 1; 1562 } 1563 1564 struct env_lst { 1565 struct env_lst *next; /* pointer to next structure */ 1566 struct env_lst *prev; /* pointer to next structure */ 1567 char *var; /* pointer to variable name */ 1568 char *value; /* pointer to varialbe value */ 1569 int export; /* 1 -> export with default list of variables */ 1570 }; 1571 1572 struct env_lst envlisthead; 1573 1574 struct env_lst * 1575 env_find(var) 1576 char *var; 1577 { 1578 register struct env_lst *ep; 1579 1580 for (ep = envlisthead.next; ep; ep = ep->next) { 1581 if (strcmp(ep->var, var) == 0) 1582 return(ep); 1583 } 1584 return(NULL); 1585 } 1586 1587 env_init() 1588 { 1589 extern char **environ, *index(); 1590 register char **epp, *cp; 1591 register struct env_lst *ep; 1592 1593 for (epp = environ; *epp; epp++) { 1594 if (cp = index(*epp, '=')) { 1595 *cp = '\0'; 1596 ep = env_define(*epp, cp+1); 1597 ep->export = 0; 1598 *cp = '='; 1599 } 1600 } 1601 /* 1602 * Special case for DISPLAY variable. If it is ":0.0" or 1603 * "unix:0.0", we have to get rid of "unix" and insert our 1604 * hostname. 1605 */ 1606 if ((ep = env_find("DISPLAY")) && 1607 ((*ep->value == ':') || (strncmp(ep->value, "unix:", 5) == 0))) { 1608 char hbuf[256+1]; 1609 char *cp2 = index(ep->value, ':'); 1610 1611 gethostname(hbuf, 256); 1612 hbuf[256] = '\0'; 1613 cp = (char *)malloc(strlen(hbuf) + strlen(cp2) + 1); 1614 sprintf(cp, "%s%s", hbuf, cp2); 1615 free(ep->value); 1616 ep->value = cp; 1617 } 1618 /* 1619 * If USER is not defined, but LOGNAME is, then add 1620 * USER with the value from LOGNAME. By default, we 1621 * don't export the USER variable. 1622 */ 1623 if ((env_find("USER") == NULL) && (ep = env_find("LOGNAME"))) { 1624 env_define("USER", ep->value); 1625 env_unexport("USER"); 1626 } 1627 env_export("DISPLAY"); 1628 env_export("PRINTER"); 1629 } 1630 1631 struct env_lst * 1632 env_define(var, value) 1633 char *var, *value; 1634 { 1635 register struct env_lst *ep; 1636 extern char *strdup(); 1637 1638 if (ep = env_find(var)) { 1639 if (ep->var) 1640 free(ep->var); 1641 if (ep->value) 1642 free(ep->value); 1643 } else { 1644 ep = (struct env_lst *)malloc(sizeof(struct env_lst)); 1645 ep->next = envlisthead.next; 1646 envlisthead.next = ep; 1647 ep->prev = &envlisthead; 1648 if (ep->next) 1649 ep->next->prev = ep; 1650 } 1651 ep->export = 1; 1652 ep->var = strdup(var); 1653 ep->value = strdup(value); 1654 return(ep); 1655 } 1656 1657 env_undefine(var) 1658 char *var; 1659 { 1660 register struct env_lst *ep; 1661 1662 if (ep = env_find(var)) { 1663 ep->prev->next = ep->next; 1664 if (ep->next) 1665 ep->next->prev = ep->prev; 1666 if (ep->var) 1667 free(ep->var); 1668 if (ep->value) 1669 free(ep->value); 1670 free(ep); 1671 } 1672 } 1673 1674 env_export(var) 1675 char *var; 1676 { 1677 register struct env_lst *ep; 1678 1679 if (ep = env_find(var)) 1680 ep->export = 1; 1681 } 1682 1683 env_unexport(var) 1684 char *var; 1685 { 1686 register struct env_lst *ep; 1687 1688 if (ep = env_find(var)) 1689 ep->export = 0; 1690 } 1691 1692 env_send(var) 1693 char *var; 1694 { 1695 register struct env_lst *ep; 1696 1697 if (my_state_is_wont(TELOPT_ENVIRON)) { 1698 fprintf(stderr, 1699 "Cannot send '%s': Telnet ENVIRON option not enabled\n", 1700 var); 1701 return; 1702 } 1703 ep = env_find(var); 1704 if (ep == 0) { 1705 fprintf(stderr, "Cannot send '%s': variable not defined\n", 1706 var); 1707 return; 1708 } 1709 env_opt_start_info(); 1710 env_opt_add(ep->var); 1711 env_opt_end(0); 1712 } 1713 1714 env_list() 1715 { 1716 register struct env_lst *ep; 1717 1718 for (ep = envlisthead.next; ep; ep = ep->next) { 1719 printf("%c %-20s %s\n", ep->export ? '*' : ' ', 1720 ep->var, ep->value); 1721 } 1722 } 1723 1724 char * 1725 env_default(init) 1726 { 1727 static struct env_lst *nep = NULL; 1728 1729 if (init) { 1730 nep = &envlisthead; 1731 return; 1732 } 1733 if (nep) { 1734 while (nep = nep->next) { 1735 if (nep->export) 1736 return(nep->var); 1737 } 1738 } 1739 return(NULL); 1740 } 1741 1742 char * 1743 env_getvalue(var) 1744 char *var; 1745 { 1746 register struct env_lst *ep; 1747 1748 if (ep = env_find(var)) 1749 return(ep->value); 1750 return(NULL); 1751 } 1752 1753 #ifdef NO_STRDUP 1754 char * 1755 strdup(s) 1756 register char *s; 1757 { 1758 register char *ret; 1759 if (ret = (char *)malloc(strlen(s)+1)) 1760 strcpy(ret, s); 1761 return(ret); 1762 } 1763 #endif 1764 1765 #if defined(unix) 1766 #ifdef notdef 1767 /* 1768 * Some information about our file descriptors. 1769 */ 1770 1771 char * 1772 decodeflags(mask) 1773 int mask; 1774 { 1775 static char buffer[100]; 1776 #define do(m,s) \ 1777 if (mask&(m)) { \ 1778 strcat(buffer, (s)); \ 1779 } 1780 1781 buffer[0] = 0; /* Terminate it */ 1782 1783 #ifdef FREAD 1784 do(FREAD, " FREAD"); 1785 #endif 1786 #ifdef FWRITE 1787 do(FWRITE, " FWRITE"); 1788 #endif 1789 #ifdef F_DUPFP 1790 do(F_DUPFD, " F_DUPFD"); 1791 #endif 1792 #ifdef FNDELAY 1793 do(FNDELAY, " FNDELAY"); 1794 #endif 1795 #ifdef FAPPEND 1796 do(FAPPEND, " FAPPEND"); 1797 #endif 1798 #ifdef FMARK 1799 do(FMARK, " FMARK"); 1800 #endif 1801 #ifdef FDEFER 1802 do(FDEFER, " FDEFER"); 1803 #endif 1804 #ifdef FASYNC 1805 do(FASYNC, " FASYNC"); 1806 #endif 1807 #ifdef FSHLOCK 1808 do(FSHLOCK, " FSHLOCK"); 1809 #endif 1810 #ifdef FEXLOCK 1811 do(FEXLOCK, " FEXLOCK"); 1812 #endif 1813 #ifdef FCREAT 1814 do(FCREAT, " FCREAT"); 1815 #endif 1816 #ifdef FTRUNC 1817 do(FTRUNC, " FTRUNC"); 1818 #endif 1819 #ifdef FEXCL 1820 do(FEXCL, " FEXCL"); 1821 #endif 1822 1823 return buffer; 1824 } 1825 #undef do 1826 #endif /* notdef */ 1827 1828 #if defined(TN3270) 1829 static void 1830 filestuff(fd) 1831 int fd; 1832 { 1833 int res; 1834 1835 #ifdef F_GETOWN 1836 setconnmode(0); 1837 res = fcntl(fd, F_GETOWN, 0); 1838 setcommandmode(); 1839 1840 if (res == -1) { 1841 perror("fcntl"); 1842 return; 1843 } 1844 printf("\tOwner is %d.\n", res); 1845 #endif 1846 1847 setconnmode(0); 1848 res = fcntl(fd, F_GETFL, 0); 1849 setcommandmode(); 1850 1851 if (res == -1) { 1852 perror("fcntl"); 1853 return; 1854 } 1855 printf("\tFlags are 0x%x: %s\n", res, decodeflags(res)); 1856 } 1857 #endif /* defined(TN3270) */ 1858 1859 1860 #endif /* defined(unix) */ 1861 1862 /* 1863 * Print status about the connection. 1864 */ 1865 /*ARGSUSED*/ 1866 static 1867 status(argc, argv) 1868 int argc; 1869 char *argv[]; 1870 { 1871 if (connected) { 1872 printf("Connected to %s.\n", hostname); 1873 if ((argc < 2) || strcmp(argv[1], "notmuch")) { 1874 int mode = getconnmode(); 1875 1876 if (my_want_state_is_will(TELOPT_LINEMODE)) { 1877 printf("Operating with LINEMODE option\n"); 1878 printf("%s line editing\n", (mode&MODE_EDIT) ? "Local" : "No"); 1879 printf("%s catching of signals\n", 1880 (mode&MODE_TRAPSIG) ? "Local" : "No"); 1881 slcstate(); 1882 #ifdef KLUDGELINEMODE 1883 } else if (kludgelinemode && my_want_state_is_dont(TELOPT_SGA)) { 1884 printf("Operating in obsolete linemode\n"); 1885 #endif 1886 } else { 1887 printf("Operating in single character mode\n"); 1888 if (localchars) 1889 printf("Catching signals locally\n"); 1890 } 1891 printf("%s character echo\n", (mode&MODE_ECHO) ? "Local" : "Remote"); 1892 if (my_want_state_is_will(TELOPT_LFLOW)) 1893 printf("%s flow control\n", (mode&MODE_FLOW) ? "Local" : "No"); 1894 } 1895 } else { 1896 printf("No connection.\n"); 1897 } 1898 # if !defined(TN3270) 1899 printf("Escape character is '%s'.\n", control(escape)); 1900 (void) fflush(stdout); 1901 # else /* !defined(TN3270) */ 1902 if ((!In3270) && ((argc < 2) || strcmp(argv[1], "notmuch"))) { 1903 printf("Escape character is '%s'.\n", control(escape)); 1904 } 1905 # if defined(unix) 1906 if ((argc >= 2) && !strcmp(argv[1], "everything")) { 1907 printf("SIGIO received %d time%s.\n", 1908 sigiocount, (sigiocount == 1)? "":"s"); 1909 if (In3270) { 1910 printf("Process ID %d, process group %d.\n", 1911 getpid(), getpgrp(getpid())); 1912 printf("Terminal input:\n"); 1913 filestuff(tin); 1914 printf("Terminal output:\n"); 1915 filestuff(tout); 1916 printf("Network socket:\n"); 1917 filestuff(net); 1918 } 1919 } 1920 if (In3270 && transcom) { 1921 printf("Transparent mode command is '%s'.\n", transcom); 1922 } 1923 # endif /* defined(unix) */ 1924 (void) fflush(stdout); 1925 if (In3270) { 1926 return 0; 1927 } 1928 # endif /* defined(TN3270) */ 1929 return 1; 1930 } 1931 1932 #ifdef SIGINFO 1933 /* 1934 * Function that gets called when SIGINFO is received. 1935 */ 1936 ayt_status() 1937 { 1938 (void) call(status, "status", "notmuch", 0); 1939 } 1940 #endif 1941 1942 #if defined(NEED_GETTOS) 1943 struct tosent { 1944 char *t_name; /* name */ 1945 char **t_aliases; /* alias list */ 1946 char *t_proto; /* protocol */ 1947 int t_tos; /* Type Of Service bits */ 1948 }; 1949 1950 struct tosent * 1951 gettosbyname(name, proto) 1952 char *name, *proto; 1953 { 1954 static struct tosent te; 1955 static char *aliasp = 0; 1956 1957 te.t_name = name; 1958 te.t_aliases = &aliasp; 1959 te.t_proto = proto; 1960 te.t_tos = 020; /* Low Delay bit */ 1961 return(&te); 1962 } 1963 #endif 1964 1965 extern int autologin; 1966 1967 int 1968 tn(argc, argv) 1969 int argc; 1970 char *argv[]; 1971 { 1972 register struct hostent *host = 0; 1973 struct sockaddr_in sin; 1974 struct servent *sp = 0; 1975 static char hnamebuf[32]; 1976 unsigned long temp, inet_addr(); 1977 extern char *inet_ntoa(); 1978 #if defined(SRCRT) && defined(IPPROTO_IP) 1979 char *srp = 0, *strrchr(); 1980 unsigned long sourceroute(), srlen; 1981 #endif 1982 #if defined(HAS_IP_TOS) || defined(NEED_GETTOS) 1983 struct tosent *tp; 1984 #endif /* defined(HAS_IP_TOS) || defined(NEED_GETTOS) */ 1985 char *cmd, *hostp = 0, *portp = 0, *user = 0; 1986 1987 /* clear the socket address prior to use */ 1988 bzero((char *)&sin, sizeof(sin)); 1989 1990 if (connected) { 1991 printf("?Already connected to %s\n", hostname); 1992 return 0; 1993 } 1994 if (argc < 2) { 1995 (void) strcpy(line, "Connect "); 1996 printf("(to) "); 1997 (void) gets(&line[strlen(line)]); 1998 makeargv(); 1999 argc = margc; 2000 argv = margv; 2001 } 2002 cmd = *argv; 2003 --argc; ++argv; 2004 while (argc) { 2005 if (strcmp(*argv, "-l") == 0) { 2006 --argc; ++argv; 2007 if (argc == 0) 2008 goto usage; 2009 user = *argv++; 2010 --argc; 2011 continue; 2012 } 2013 if (strcmp(*argv, "-a") == 0) { 2014 --argc; ++argv; 2015 autologin = 1; 2016 continue; 2017 } 2018 if (hostp == 0) { 2019 hostp = *argv++; 2020 --argc; 2021 continue; 2022 } 2023 if (portp == 0) { 2024 portp = *argv++; 2025 --argc; 2026 continue; 2027 } 2028 usage: 2029 printf("usage: %s [-l user] [-a] host-name [port]\n", cmd); 2030 return 0; 2031 } 2032 #if defined(SRCRT) && defined(IPPROTO_IP) 2033 if (hostp[0] == '@' || hostp[0] == '!') { 2034 if ((hostname = strrchr(hostp, ':')) == NULL) 2035 hostname = strrchr(hostp, '@'); 2036 hostname++; 2037 srp = 0; 2038 temp = sourceroute(hostp, &srp, &srlen); 2039 if (temp == 0) { 2040 herror(srp); 2041 return 0; 2042 } else if (temp == -1) { 2043 printf("Bad source route option: %s\n", hostp); 2044 return 0; 2045 } else { 2046 sin.sin_addr.s_addr = temp; 2047 sin.sin_family = AF_INET; 2048 } 2049 } else { 2050 #endif 2051 temp = inet_addr(hostp); 2052 if (temp != (unsigned long) -1) { 2053 sin.sin_addr.s_addr = temp; 2054 sin.sin_family = AF_INET; 2055 (void) strcpy(hnamebuf, hostp); 2056 hostname = hnamebuf; 2057 } else { 2058 host = gethostbyname(hostp); 2059 if (host) { 2060 sin.sin_family = host->h_addrtype; 2061 #if defined(h_addr) /* In 4.3, this is a #define */ 2062 memcpy((caddr_t)&sin.sin_addr, 2063 host->h_addr_list[0], host->h_length); 2064 #else /* defined(h_addr) */ 2065 memcpy((caddr_t)&sin.sin_addr, host->h_addr, host->h_length); 2066 #endif /* defined(h_addr) */ 2067 hostname = host->h_name; 2068 } else { 2069 herror(hostp); 2070 return 0; 2071 } 2072 } 2073 #if defined(SRCRT) && defined(IPPROTO_IP) 2074 } 2075 #endif 2076 if (portp) { 2077 if (*portp == '-') { 2078 portp++; 2079 telnetport = 1; 2080 } else 2081 telnetport = 0; 2082 sin.sin_port = atoi(portp); 2083 if (sin.sin_port == 0) { 2084 sp = getservbyname(portp, "tcp"); 2085 if (sp) 2086 sin.sin_port = sp->s_port; 2087 else { 2088 printf("%s: bad port number\n", portp); 2089 return 0; 2090 } 2091 } else { 2092 #if !defined(htons) 2093 u_short htons(); 2094 #endif /* !defined(htons) */ 2095 sin.sin_port = htons(sin.sin_port); 2096 } 2097 } else { 2098 if (sp == 0) { 2099 sp = getservbyname("telnet", "tcp"); 2100 if (sp == 0) { 2101 fprintf(stderr, "telnet: tcp/telnet: unknown service\n"); 2102 return 0; 2103 } 2104 sin.sin_port = sp->s_port; 2105 } 2106 telnetport = 1; 2107 } 2108 printf("Trying %s...\n", inet_ntoa(sin.sin_addr)); 2109 do { 2110 net = socket(AF_INET, SOCK_STREAM, 0); 2111 if (net < 0) { 2112 perror("telnet: socket"); 2113 return 0; 2114 } 2115 #if defined(SRCRT) && defined(IPPROTO_IP) 2116 if (srp && setsockopt(net, IPPROTO_IP, IP_OPTIONS, (char *)srp, srlen) < 0) 2117 perror("setsockopt (IP_OPTIONS)"); 2118 #endif 2119 #if defined(HAS_IP_TOS) || defined(NEED_GETTOS) 2120 if ((tp = gettosbyname("telnet", "tcp")) && 2121 (setsockopt(net, IPPROTO_IP, IP_TOS, &tp->t_tos, sizeof(int)) < 0)) 2122 perror("telnet: setsockopt TOS (ignored)"); 2123 #endif /* defined(HAS_IP_TOS) || defined(NEED_GETTOS) */ 2124 2125 if (debug && SetSockOpt(net, SOL_SOCKET, SO_DEBUG, 1) < 0) { 2126 perror("setsockopt (SO_DEBUG)"); 2127 } 2128 2129 if (connect(net, (struct sockaddr *)&sin, sizeof (sin)) < 0) { 2130 #if defined(h_addr) /* In 4.3, this is a #define */ 2131 if (host && host->h_addr_list[1]) { 2132 int oerrno = errno; 2133 2134 fprintf(stderr, "telnet: connect to address %s: ", 2135 inet_ntoa(sin.sin_addr)); 2136 errno = oerrno; 2137 perror((char *)0); 2138 host->h_addr_list++; 2139 memcpy((caddr_t)&sin.sin_addr, 2140 host->h_addr_list[0], host->h_length); 2141 (void) NetClose(net); 2142 continue; 2143 } 2144 #endif /* defined(h_addr) */ 2145 perror("telnet: Unable to connect to remote host"); 2146 return 0; 2147 } 2148 connected++; 2149 } while (connected == 0); 2150 cmdrc(hostp, hostname); 2151 if (autologin && user == NULL) { 2152 struct passwd *pw; 2153 2154 user = getenv("USER"); 2155 if (user == NULL || 2156 (pw = getpwnam(user)) && pw->pw_uid != getuid()) { 2157 if (pw = getpwuid(getuid())) 2158 user = pw->pw_name; 2159 else 2160 user = NULL; 2161 } 2162 } 2163 if (user) { 2164 env_define("USER", user); 2165 env_export("USER"); 2166 } 2167 (void) call(status, "status", "notmuch", 0); 2168 if (setjmp(peerdied) == 0) 2169 telnet(); 2170 (void) NetClose(net); 2171 ExitString("Connection closed by foreign host.\n",1); 2172 /*NOTREACHED*/ 2173 } 2174 2175 2176 #define HELPINDENT (sizeof ("connect")) 2177 2178 static char 2179 openhelp[] = "connect to a site", 2180 closehelp[] = "close current connection", 2181 quithelp[] = "exit telnet", 2182 statushelp[] = "print status information", 2183 helphelp[] = "print help information", 2184 sendhelp[] = "transmit special characters ('send ?' for more)", 2185 sethelp[] = "set operating parameters ('set ?' for more)", 2186 unsethelp[] = "unset operating parameters ('unset ?' for more)", 2187 togglestring[] ="toggle operating parameters ('toggle ?' for more)", 2188 slchelp[] = "change state of special charaters ('slc ?' for more)", 2189 displayhelp[] = "display operating parameters", 2190 #if defined(TN3270) && defined(unix) 2191 transcomhelp[] = "specify Unix command for transparent mode pipe", 2192 #endif /* defined(TN3270) && defined(unix) */ 2193 #if defined(unix) 2194 zhelp[] = "suspend telnet", 2195 #endif /* defined(unix) */ 2196 shellhelp[] = "invoke a subshell", 2197 envhelp[] = "change environment variables ('environ ?' for more)", 2198 modestring[] = "try to enter line or character mode ('mode ?' for more)"; 2199 2200 extern int help(), shell(); 2201 2202 static Command cmdtab[] = { 2203 { "close", closehelp, bye, 1 }, 2204 { "display", displayhelp, display, 0 }, 2205 { "mode", modestring, modecmd, 0 }, 2206 { "open", openhelp, tn, 0 }, 2207 { "quit", quithelp, quit, 0 }, 2208 { "send", sendhelp, sendcmd, 0 }, 2209 { "set", sethelp, setcmd, 0 }, 2210 { "unset", unsethelp, unsetcmd, 0 }, 2211 { "status", statushelp, status, 0 }, 2212 { "toggle", togglestring, toggle, 0 }, 2213 { "slc", slchelp, slccmd, 0 }, 2214 #if defined(TN3270) && defined(unix) 2215 { "transcom", transcomhelp, settranscom, 0 }, 2216 #endif /* defined(TN3270) && defined(unix) */ 2217 #if defined(unix) 2218 { "z", zhelp, suspend, 0 }, 2219 #endif /* defined(unix) */ 2220 #if defined(TN3270) 2221 { "!", shellhelp, shell, 1 }, 2222 #else 2223 { "!", shellhelp, shell, 0 }, 2224 #endif 2225 { "environ", envhelp, env_cmd, 0 }, 2226 { "?", helphelp, help, 0 }, 2227 0 2228 }; 2229 2230 static char crmodhelp[] = "deprecated command -- use 'toggle crmod' instead"; 2231 static char escapehelp[] = "deprecated command -- use 'set escape' instead"; 2232 2233 static Command cmdtab2[] = { 2234 { "help", 0, help, 0 }, 2235 { "escape", escapehelp, setescape, 0 }, 2236 { "crmod", crmodhelp, togcrmod, 0 }, 2237 0 2238 }; 2239 2240 2241 /* 2242 * Call routine with argc, argv set from args (terminated by 0). 2243 */ 2244 2245 /*VARARGS1*/ 2246 static 2247 call(va_alist) 2248 va_dcl 2249 { 2250 va_list ap; 2251 typedef int (*intrtn_t)(); 2252 intrtn_t routine; 2253 char *args[100]; 2254 int argno = 0; 2255 2256 va_start(ap); 2257 routine = (va_arg(ap, intrtn_t)); 2258 while ((args[argno++] = va_arg(ap, char *)) != 0) { 2259 ; 2260 } 2261 va_end(ap); 2262 return (*routine)(argno-1, args); 2263 } 2264 2265 2266 static char ** 2267 getnextcmd(name) 2268 char *name; 2269 { 2270 Command *c = (Command *) name; 2271 2272 return (char **) (c+1); 2273 } 2274 2275 static Command * 2276 getcmd(name) 2277 char *name; 2278 { 2279 Command *cm; 2280 2281 if ((cm = (Command *) genget(name, (char **) cmdtab, getnextcmd)) != 0) { 2282 return cm; 2283 } else { 2284 return (Command *) genget(name, (char **) cmdtab2, getnextcmd); 2285 } 2286 } 2287 2288 void 2289 command(top, tbuf, cnt) 2290 int top; 2291 char *tbuf; 2292 int cnt; 2293 { 2294 register Command *c; 2295 2296 setcommandmode(); 2297 if (!top) { 2298 putchar('\n'); 2299 #if defined(unix) 2300 } else { 2301 (void) signal(SIGINT, SIG_DFL); 2302 (void) signal(SIGQUIT, SIG_DFL); 2303 #endif /* defined(unix) */ 2304 } 2305 for (;;) { 2306 printf("%s> ", prompt); 2307 if (tbuf) { 2308 register char *cp; 2309 cp = line; 2310 while (cnt > 0 && (*cp++ = *tbuf++) != '\n') 2311 cnt--; 2312 tbuf = 0; 2313 if (cp == line || *--cp != '\n' || cp == line) 2314 goto getline; 2315 *cp = '\0'; 2316 printf("%s\n", line); 2317 } else { 2318 getline: 2319 if (gets(line) == NULL) { 2320 if (feof(stdin) || ferror(stdin)) { 2321 (void) quit(); 2322 /*NOTREACHED*/ 2323 } 2324 break; 2325 } 2326 } 2327 if (line[0] == 0) 2328 break; 2329 makeargv(); 2330 if (margv[0] == 0) { 2331 break; 2332 } 2333 c = getcmd(margv[0]); 2334 if (Ambiguous(c)) { 2335 printf("?Ambiguous command\n"); 2336 continue; 2337 } 2338 if (c == 0) { 2339 printf("?Invalid command\n"); 2340 continue; 2341 } 2342 if (c->needconnect && !connected) { 2343 printf("?Need to be connected first.\n"); 2344 continue; 2345 } 2346 if ((*c->handler)(margc, margv)) { 2347 break; 2348 } 2349 } 2350 if (!top) { 2351 if (!connected) { 2352 longjmp(toplevel, 1); 2353 /*NOTREACHED*/ 2354 } 2355 #if defined(TN3270) 2356 if (shell_active == 0) { 2357 setconnmode(0); 2358 } 2359 #else /* defined(TN3270) */ 2360 setconnmode(0); 2361 #endif /* defined(TN3270) */ 2362 } 2363 } 2364 2365 /* 2366 * Help command. 2367 */ 2368 static 2369 help(argc, argv) 2370 int argc; 2371 char *argv[]; 2372 { 2373 register Command *c; 2374 2375 if (argc == 1) { 2376 printf("Commands may be abbreviated. Commands are:\n\n"); 2377 for (c = cmdtab; c->name; c++) 2378 if (c->help) { 2379 printf("%-*s\t%s\n", HELPINDENT, c->name, 2380 c->help); 2381 } 2382 return 0; 2383 } 2384 while (--argc > 0) { 2385 register char *arg; 2386 arg = *++argv; 2387 c = getcmd(arg); 2388 if (Ambiguous(c)) 2389 printf("?Ambiguous help command %s\n", arg); 2390 else if (c == (Command *)0) 2391 printf("?Invalid help command %s\n", arg); 2392 else 2393 printf("%s\n", c->help); 2394 } 2395 return 0; 2396 } 2397 2398 static char *rcname = 0; 2399 static char rcbuf[128]; 2400 2401 cmdrc(m1, m2) 2402 char *m1, *m2; 2403 { 2404 register Command *c; 2405 FILE *rcfile; 2406 int gotmachine = 0; 2407 int l1 = strlen(m1); 2408 int l2 = strlen(m2); 2409 char m1save[64]; 2410 2411 strcpy(m1save, m1); 2412 m1 = m1save; 2413 2414 if (rcname == 0) { 2415 rcname = getenv("HOME"); 2416 if (rcname) 2417 strcpy(rcbuf, rcname); 2418 else 2419 rcbuf[0] = '\0'; 2420 strcat(rcbuf, "/.telnetrc"); 2421 rcname = rcbuf; 2422 } 2423 2424 if ((rcfile = fopen(rcname, "r")) == 0) { 2425 return; 2426 } 2427 2428 for (;;) { 2429 if (fgets(line, sizeof(line), rcfile) == NULL) 2430 break; 2431 if (line[0] == 0) 2432 break; 2433 if (line[0] == '#') 2434 continue; 2435 if (gotmachine == 0) { 2436 if (isspace(line[0])) 2437 continue; 2438 if (strncasecmp(line, m1, l1) == 0) 2439 strncpy(line, &line[l1], sizeof(line) - l1); 2440 else if (strncasecmp(line, m2, l2) == 0) 2441 strncpy(line, &line[l2], sizeof(line) - l2); 2442 else 2443 continue; 2444 gotmachine = 1; 2445 } else { 2446 if (!isspace(line[0])) { 2447 gotmachine = 0; 2448 continue; 2449 } 2450 } 2451 makeargv(); 2452 if (margv[0] == 0) 2453 continue; 2454 c = getcmd(margv[0]); 2455 if (Ambiguous(c)) { 2456 printf("?Ambiguous command: %s\n", margv[0]); 2457 continue; 2458 } 2459 if (c == 0) { 2460 printf("?Invalid command: %s\n", margv[0]); 2461 continue; 2462 } 2463 /* 2464 * This should never happen... 2465 */ 2466 if (c->needconnect && !connected) { 2467 printf("?Need to be connected first for %s.\n", margv[0]); 2468 continue; 2469 } 2470 (*c->handler)(margc, margv); 2471 } 2472 fclose(rcfile); 2473 } 2474 2475 #if defined(SRCRT) && defined(IPPROTO_IP) 2476 2477 /* 2478 * Source route is handed in as 2479 * [!]@hop1@hop2...[@|:]dst 2480 * If the leading ! is present, it is a 2481 * strict source route, otherwise it is 2482 * assmed to be a loose source route. 2483 * 2484 * We fill in the source route option as 2485 * hop1,hop2,hop3...dest 2486 * and return a pointer to hop1, which will 2487 * be the address to connect() to. 2488 * 2489 * Arguments: 2490 * arg: pointer to route list to decipher 2491 * 2492 * cpp: If *cpp is not equal to NULL, this is a 2493 * pointer to a pointer to a character array 2494 * that should be filled in with the option. 2495 * 2496 * lenp: pointer to an integer that contains the 2497 * length of *cpp if *cpp != NULL. 2498 * 2499 * Return values: 2500 * 2501 * Returns the address of the host to connect to. If the 2502 * return value is -1, there was a syntax error in the 2503 * option, either unknown characters, or too many hosts. 2504 * If the return value is 0, one of the hostnames in the 2505 * path is unknown, and *cpp is set to point to the bad 2506 * hostname. 2507 * 2508 * *cpp: If *cpp was equal to NULL, it will be filled 2509 * in with a pointer to our static area that has 2510 * the option filled in. This will be 32bit aligned. 2511 * 2512 * *lenp: This will be filled in with how long the option 2513 * pointed to by *cpp is. 2514 * 2515 */ 2516 unsigned long 2517 sourceroute(arg, cpp, lenp) 2518 char *arg; 2519 char **cpp; 2520 int *lenp; 2521 { 2522 static char lsr[44]; 2523 char *cp, *cp2, *lsrp, *lsrep, *index(); 2524 register int tmp; 2525 struct in_addr sin_addr; 2526 register struct hostent *host = 0; 2527 register char c; 2528 2529 /* 2530 * Verify the arguments, and make sure we have 2531 * at least 7 bytes for the option. 2532 */ 2533 if (cpp == NULL || lenp == NULL) 2534 return((unsigned long)-1); 2535 if (*cpp != NULL && *lenp < 7) 2536 return((unsigned long)-1); 2537 /* 2538 * Decide whether we have a buffer passed to us, 2539 * or if we need to use our own static buffer. 2540 */ 2541 if (*cpp) { 2542 lsrp = *cpp; 2543 lsrep = lsrp + *lenp; 2544 } else { 2545 *cpp = lsrp = lsr; 2546 lsrep = lsrp + 44; 2547 } 2548 2549 cp = arg; 2550 2551 /* 2552 * Next, decide whether we have a loose source 2553 * route or a strict source route, and fill in 2554 * the begining of the option. 2555 */ 2556 if (*cp == '!') { 2557 cp++; 2558 *lsrp++ = IPOPT_SSRR; 2559 } else 2560 *lsrp++ = IPOPT_LSRR; 2561 2562 if (*cp != '@') 2563 return((unsigned long)-1); 2564 2565 lsrp++; /* skip over length, we'll fill it in later */ 2566 *lsrp++ = 4; 2567 2568 cp++; 2569 2570 sin_addr.s_addr = 0; 2571 2572 for (c = 0;;) { 2573 if (c == ':') 2574 cp2 = 0; 2575 else for (cp2 = cp; c = *cp2; cp2++) { 2576 if (c == ',') { 2577 *cp2++ = '\0'; 2578 if (*cp2 == '@') 2579 cp2++; 2580 } else if (c == '@') { 2581 *cp2++ = '\0'; 2582 } else if (c == ':') { 2583 *cp2++ = '\0'; 2584 } else 2585 continue; 2586 break; 2587 } 2588 if (!c) 2589 cp2 = 0; 2590 2591 if ((tmp = inet_addr(cp)) != -1) { 2592 sin_addr.s_addr = tmp; 2593 } else if (host = gethostbyname(cp)) { 2594 #if defined(h_addr) 2595 memcpy((caddr_t)&sin_addr, 2596 host->h_addr_list[0], host->h_length); 2597 #else 2598 memcpy((caddr_t)&sin_addr, host->h_addr, host->h_length); 2599 #endif 2600 } else { 2601 *cpp = cp; 2602 return(0); 2603 } 2604 memcpy(lsrp, (char *)&sin_addr, 4); 2605 lsrp += 4; 2606 if (cp2) 2607 cp = cp2; 2608 else 2609 break; 2610 /* 2611 * Check to make sure there is space for next address 2612 */ 2613 if (lsrp + 4 > lsrep) 2614 return((unsigned long)-1); 2615 } 2616 if ((*(*cpp+IPOPT_OLEN) = lsrp - *cpp) <= 7) { 2617 *cpp = 0; 2618 *lenp = 0; 2619 return((unsigned long)-1); 2620 } 2621 *lsrp++ = IPOPT_NOP; /* 32 bit word align it */ 2622 *lenp = lsrp - *cpp; 2623 return(sin_addr.s_addr); 2624 } 2625 #endif 2626 2627 #if defined(NOSTRNCASECMP) 2628 strncasecmp(p1, p2, len) 2629 register char *p1, *p2; 2630 int len; 2631 { 2632 while (len--) { 2633 if (tolower(*p1) != tolower(*p2)) 2634 return(tolower(*p1) - tolower(*p2)); 2635 if (*p1 == '\0') 2636 return(0); 2637 p1++, p2++; 2638 } 2639 return(0); 2640 } 2641 #endif 2642