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 5.7 (Berkeley) 11/16/92"; 10 #endif /* not lint */ 11 12 #if defined(unix) 13 #include <sys/param.h> 14 #ifdef CRAY 15 #include <sys/types.h> 16 #endif 17 #include <sys/file.h> 18 #else 19 #include <sys/types.h> 20 #endif /* defined(unix) */ 21 #include <sys/socket.h> 22 #include <netinet/in.h> 23 #ifdef CRAY 24 #include <fcntl.h> 25 #endif /* CRAY */ 26 27 #include <signal.h> 28 #include <netdb.h> 29 #include <ctype.h> 30 #include <pwd.h> 31 #include <varargs.h> 32 #include <errno.h> 33 34 #include <arpa/telnet.h> 35 36 #include "general.h" 37 38 #include "ring.h" 39 40 #include "externs.h" 41 #include "defines.h" 42 #include "types.h" 43 44 #ifndef CRAY 45 #include <netinet/in_systm.h> 46 # if (defined(vax) || defined(tahoe) || defined(hp300)) && !defined(ultrix) 47 # include <machine/endian.h> 48 # endif /* vax */ 49 #endif /* CRAY */ 50 #include <netinet/ip.h> 51 52 53 #ifndef MAXHOSTNAMELEN 54 #define MAXHOSTNAMELEN 64 55 #endif MAXHOSTNAMELEN 56 57 #if defined(IPPROTO_IP) && defined(IP_TOS) 58 int tos = -1; 59 #endif /* defined(IPPROTO_IP) && defined(IP_TOS) */ 60 61 char *hostname; 62 static char _hostname[MAXHOSTNAMELEN]; 63 64 extern char *getenv(); 65 66 extern int isprefix(); 67 extern char **genget(); 68 extern int Ambiguous(); 69 70 static call(); 71 72 typedef struct { 73 char *name; /* command name */ 74 char *help; /* help string (NULL for no help) */ 75 int (*handler)(); /* routine which executes command */ 76 int needconnect; /* Do we need to be connected to execute? */ 77 } Command; 78 79 static char line[256]; 80 static char saveline[256]; 81 static int margc; 82 static char *margv[20]; 83 84 static void 85 makeargv() 86 { 87 register char *cp, *cp2, c; 88 register char **argp = margv; 89 90 margc = 0; 91 cp = line; 92 if (*cp == '!') { /* Special case shell escape */ 93 strcpy(saveline, line); /* save for shell command */ 94 *argp++ = "!"; /* No room in string to get this */ 95 margc++; 96 cp++; 97 } 98 while (c = *cp) { 99 register int inquote = 0; 100 while (isspace(c)) 101 c = *++cp; 102 if (c == '\0') 103 break; 104 *argp++ = cp; 105 margc += 1; 106 for (cp2 = cp; c != '\0'; c = *++cp) { 107 if (inquote) { 108 if (c == inquote) { 109 inquote = 0; 110 continue; 111 } 112 } else { 113 if (c == '\\') { 114 if ((c = *++cp) == '\0') 115 break; 116 } else if (c == '"') { 117 inquote = '"'; 118 continue; 119 } else if (c == '\'') { 120 inquote = '\''; 121 continue; 122 } else if (isspace(c)) 123 break; 124 } 125 *cp2++ = c; 126 } 127 *cp2 = '\0'; 128 if (c == '\0') 129 break; 130 cp++; 131 } 132 *argp++ = 0; 133 } 134 135 /* 136 * Make a character string into a number. 137 * 138 * Todo: 1. Could take random integers (12, 0x12, 012, 0b1). 139 */ 140 141 static 142 special(s) 143 register char *s; 144 { 145 register char c; 146 char b; 147 148 switch (*s) { 149 case '^': 150 b = *++s; 151 if (b == '?') { 152 c = b | 0x40; /* DEL */ 153 } else { 154 c = b & 0x1f; 155 } 156 break; 157 default: 158 c = *s; 159 break; 160 } 161 return c; 162 } 163 164 /* 165 * Construct a control character sequence 166 * for a special character. 167 */ 168 static char * 169 control(c) 170 register cc_t c; 171 { 172 static char buf[5]; 173 /* 174 * The only way I could get the Sun 3.5 compiler 175 * to shut up about 176 * if ((unsigned int)c >= 0x80) 177 * was to assign "c" to an unsigned int variable... 178 * Arggg.... 179 */ 180 register unsigned int uic = (unsigned int)c; 181 182 if (uic == 0x7f) 183 return ("^?"); 184 if (c == (cc_t)_POSIX_VDISABLE) { 185 return "off"; 186 } 187 if (uic >= 0x80) { 188 buf[0] = '\\'; 189 buf[1] = ((c>>6)&07) + '0'; 190 buf[2] = ((c>>3)&07) + '0'; 191 buf[3] = (c&07) + '0'; 192 buf[4] = 0; 193 } else if (uic >= 0x20) { 194 buf[0] = c; 195 buf[1] = 0; 196 } else { 197 buf[0] = '^'; 198 buf[1] = '@'+c; 199 buf[2] = 0; 200 } 201 return (buf); 202 } 203 204 205 206 /* 207 * The following are data structures and routines for 208 * the "send" command. 209 * 210 */ 211 212 struct sendlist { 213 char *name; /* How user refers to it (case independent) */ 214 char *help; /* Help information (0 ==> no help) */ 215 int needconnect; /* Need to be connected */ 216 int narg; /* Number of arguments */ 217 int (*handler)(); /* Routine to perform (for special ops) */ 218 int nbyte; /* Number of bytes to send this command */ 219 int what; /* Character to be sent (<0 ==> special) */ 220 }; 221 222 223 static int 224 send_esc P((void)), 225 send_help P((void)), 226 send_docmd P((char *)), 227 send_dontcmd P((char *)), 228 send_willcmd P((char *)), 229 send_wontcmd P((char *)); 230 231 static struct sendlist Sendlist[] = { 232 { "ao", "Send Telnet Abort output", 1, 0, 0, 2, AO }, 233 { "ayt", "Send Telnet 'Are You There'", 1, 0, 0, 2, AYT }, 234 { "brk", "Send Telnet Break", 1, 0, 0, 2, BREAK }, 235 { "break", 0, 1, 0, 0, 2, BREAK }, 236 { "ec", "Send Telnet Erase Character", 1, 0, 0, 2, EC }, 237 { "el", "Send Telnet Erase Line", 1, 0, 0, 2, EL }, 238 { "escape", "Send current escape character", 1, 0, send_esc, 1, 0 }, 239 { "ga", "Send Telnet 'Go Ahead' sequence", 1, 0, 0, 2, GA }, 240 { "ip", "Send Telnet Interrupt Process", 1, 0, 0, 2, IP }, 241 { "intp", 0, 1, 0, 0, 2, IP }, 242 { "interrupt", 0, 1, 0, 0, 2, IP }, 243 { "intr", 0, 1, 0, 0, 2, IP }, 244 { "nop", "Send Telnet 'No operation'", 1, 0, 0, 2, NOP }, 245 { "eor", "Send Telnet 'End of Record'", 1, 0, 0, 2, EOR }, 246 { "abort", "Send Telnet 'Abort Process'", 1, 0, 0, 2, ABORT }, 247 { "susp", "Send Telnet 'Suspend Process'", 1, 0, 0, 2, SUSP }, 248 { "eof", "Send Telnet End of File Character", 1, 0, 0, 2, xEOF }, 249 { "synch", "Perform Telnet 'Synch operation'", 1, 0, dosynch, 2, 0 }, 250 { "getstatus", "Send request for STATUS", 1, 0, get_status, 6, 0 }, 251 { "?", "Display send options", 0, 0, send_help, 0, 0 }, 252 { "help", 0, 0, 0, send_help, 0, 0 }, 253 { "do", 0, 0, 1, send_docmd, 3, 0 }, 254 { "dont", 0, 0, 1, send_dontcmd, 3, 0 }, 255 { "will", 0, 0, 1, send_willcmd, 3, 0 }, 256 { "wont", 0, 0, 1, send_wontcmd, 3, 0 }, 257 { 0 } 258 }; 259 260 #define GETSEND(name) ((struct sendlist *) genget(name, (char **) Sendlist, \ 261 sizeof(struct sendlist))) 262 263 static int 264 sendcmd(argc, argv) 265 int argc; 266 char **argv; 267 { 268 int count; /* how many bytes we are going to need to send */ 269 int i; 270 int question = 0; /* was at least one argument a question */ 271 struct sendlist *s; /* pointer to current command */ 272 int success = 0; 273 int needconnect = 0; 274 275 if (argc < 2) { 276 printf("need at least one argument for 'send' command\n"); 277 printf("'send ?' for help\n"); 278 return 0; 279 } 280 /* 281 * First, validate all the send arguments. 282 * In addition, we see how much space we are going to need, and 283 * whether or not we will be doing a "SYNCH" operation (which 284 * flushes the network queue). 285 */ 286 count = 0; 287 for (i = 1; i < argc; i++) { 288 s = GETSEND(argv[i]); 289 if (s == 0) { 290 printf("Unknown send argument '%s'\n'send ?' for help.\n", 291 argv[i]); 292 return 0; 293 } else if (Ambiguous(s)) { 294 printf("Ambiguous send argument '%s'\n'send ?' for help.\n", 295 argv[i]); 296 return 0; 297 } 298 if (i + s->narg >= argc) { 299 fprintf(stderr, 300 "Need %d argument%s to 'send %s' command. 'send %s ?' for help.\n", 301 s->narg, s->narg == 1 ? "" : "s", s->name, s->name); 302 return 0; 303 } 304 count += s->nbyte; 305 if (s->handler == send_help) { 306 send_help(); 307 return 0; 308 } 309 310 i += s->narg; 311 needconnect += s->needconnect; 312 } 313 if (!connected && needconnect) { 314 printf("?Need to be connected first.\n"); 315 printf("'send ?' for help\n"); 316 return 0; 317 } 318 /* Now, do we have enough room? */ 319 if (NETROOM() < count) { 320 printf("There is not enough room in the buffer TO the network\n"); 321 printf("to process your request. Nothing will be done.\n"); 322 printf("('send synch' will throw away most data in the network\n"); 323 printf("buffer, if this might help.)\n"); 324 return 0; 325 } 326 /* OK, they are all OK, now go through again and actually send */ 327 count = 0; 328 for (i = 1; i < argc; i++) { 329 if ((s = GETSEND(argv[i])) == 0) { 330 fprintf(stderr, "Telnet 'send' error - argument disappeared!\n"); 331 (void) quit(); 332 /*NOTREACHED*/ 333 } 334 if (s->handler) { 335 count++; 336 success += (*s->handler)((s->narg > 0) ? argv[i+1] : 0, 337 (s->narg > 1) ? argv[i+2] : 0); 338 i += s->narg; 339 } else { 340 NET2ADD(IAC, s->what); 341 printoption("SENT", IAC, s->what); 342 } 343 } 344 return (count == success); 345 } 346 347 static int 348 send_esc() 349 { 350 NETADD(escape); 351 return 1; 352 } 353 354 static int 355 send_docmd(name) 356 char *name; 357 { 358 void send_do(); 359 return(send_tncmd(send_do, "do", name)); 360 } 361 362 static int 363 send_dontcmd(name) 364 char *name; 365 { 366 void send_dont(); 367 return(send_tncmd(send_dont, "dont", name)); 368 } 369 static int 370 send_willcmd(name) 371 char *name; 372 { 373 void send_will(); 374 return(send_tncmd(send_will, "will", name)); 375 } 376 static int 377 send_wontcmd(name) 378 char *name; 379 { 380 void send_wont(); 381 return(send_tncmd(send_wont, "wont", name)); 382 } 383 384 int 385 send_tncmd(func, cmd, name) 386 void (*func)(); 387 char *cmd, *name; 388 { 389 char **cpp; 390 extern char *telopts[]; 391 392 if (isprefix(name, "help") || isprefix(name, "?")) { 393 register int col, len; 394 395 printf("Usage: send %s <option>\n", cmd); 396 printf("Valid options are:\n\t"); 397 398 col = 8; 399 for (cpp = telopts; *cpp; cpp++) { 400 len = strlen(*cpp) + 1; 401 if (col + len > 65) { 402 printf("\n\t"); 403 col = 8; 404 } 405 printf(" %s", *cpp); 406 col += len; 407 } 408 printf("\n"); 409 return 0; 410 } 411 cpp = (char **)genget(name, telopts, sizeof(char *)); 412 if (Ambiguous(cpp)) { 413 fprintf(stderr,"'%s': ambiguous argument ('send %s ?' for help).\n", 414 name, cmd); 415 return 0; 416 } 417 if (cpp == 0) { 418 fprintf(stderr, "'%s': unknown argument ('send %s ?' for help).\n", 419 name, cmd); 420 return 0; 421 } 422 if (!connected) { 423 printf("?Need to be connected first.\n"); 424 return 0; 425 } 426 (*func)(cpp - telopts, 1); 427 return 1; 428 } 429 430 static int 431 send_help() 432 { 433 struct sendlist *s; /* pointer to current command */ 434 for (s = Sendlist; s->name; s++) { 435 if (s->help) 436 printf("%-15s %s\n", s->name, s->help); 437 } 438 return(0); 439 } 440 441 /* 442 * The following are the routines and data structures referred 443 * to by the arguments to the "toggle" command. 444 */ 445 446 static int 447 lclchars() 448 { 449 donelclchars = 1; 450 return 1; 451 } 452 453 static int 454 togdebug() 455 { 456 #ifndef NOT43 457 if (net > 0 && 458 (SetSockOpt(net, SOL_SOCKET, SO_DEBUG, debug)) < 0) { 459 perror("setsockopt (SO_DEBUG)"); 460 } 461 #else /* NOT43 */ 462 if (debug) { 463 if (net > 0 && SetSockOpt(net, SOL_SOCKET, SO_DEBUG, 0, 0) < 0) 464 perror("setsockopt (SO_DEBUG)"); 465 } else 466 printf("Cannot turn off socket debugging\n"); 467 #endif /* NOT43 */ 468 return 1; 469 } 470 471 472 static int 473 togcrlf() 474 { 475 if (crlf) { 476 printf("Will send carriage returns as telnet <CR><LF>.\n"); 477 } else { 478 printf("Will send carriage returns as telnet <CR><NUL>.\n"); 479 } 480 return 1; 481 } 482 483 int binmode; 484 485 static int 486 togbinary(val) 487 int val; 488 { 489 donebinarytoggle = 1; 490 491 if (val >= 0) { 492 binmode = val; 493 } else { 494 if (my_want_state_is_will(TELOPT_BINARY) && 495 my_want_state_is_do(TELOPT_BINARY)) { 496 binmode = 1; 497 } else if (my_want_state_is_wont(TELOPT_BINARY) && 498 my_want_state_is_dont(TELOPT_BINARY)) { 499 binmode = 0; 500 } 501 val = binmode ? 0 : 1; 502 } 503 504 if (val == 1) { 505 if (my_want_state_is_will(TELOPT_BINARY) && 506 my_want_state_is_do(TELOPT_BINARY)) { 507 printf("Already operating in binary mode with remote host.\n"); 508 } else { 509 printf("Negotiating binary mode with remote host.\n"); 510 tel_enter_binary(3); 511 } 512 } else { 513 if (my_want_state_is_wont(TELOPT_BINARY) && 514 my_want_state_is_dont(TELOPT_BINARY)) { 515 printf("Already in network ascii mode with remote host.\n"); 516 } else { 517 printf("Negotiating network ascii mode with remote host.\n"); 518 tel_leave_binary(3); 519 } 520 } 521 return 1; 522 } 523 524 static int 525 togrbinary(val) 526 int val; 527 { 528 donebinarytoggle = 1; 529 530 if (val == -1) 531 val = my_want_state_is_do(TELOPT_BINARY) ? 0 : 1; 532 533 if (val == 1) { 534 if (my_want_state_is_do(TELOPT_BINARY)) { 535 printf("Already receiving in binary mode.\n"); 536 } else { 537 printf("Negotiating binary mode on input.\n"); 538 tel_enter_binary(1); 539 } 540 } else { 541 if (my_want_state_is_dont(TELOPT_BINARY)) { 542 printf("Already receiving in network ascii mode.\n"); 543 } else { 544 printf("Negotiating network ascii mode on input.\n"); 545 tel_leave_binary(1); 546 } 547 } 548 return 1; 549 } 550 551 static int 552 togxbinary(val) 553 int val; 554 { 555 donebinarytoggle = 1; 556 557 if (val == -1) 558 val = my_want_state_is_will(TELOPT_BINARY) ? 0 : 1; 559 560 if (val == 1) { 561 if (my_want_state_is_will(TELOPT_BINARY)) { 562 printf("Already transmitting in binary mode.\n"); 563 } else { 564 printf("Negotiating binary mode on output.\n"); 565 tel_enter_binary(2); 566 } 567 } else { 568 if (my_want_state_is_wont(TELOPT_BINARY)) { 569 printf("Already transmitting in network ascii mode.\n"); 570 } else { 571 printf("Negotiating network ascii mode on output.\n"); 572 tel_leave_binary(2); 573 } 574 } 575 return 1; 576 } 577 578 579 static int togglehelp P((void)); 580 #if defined(AUTHENTICATE) 581 extern int auth_togdebug P((int)); 582 #endif 583 #if defined(ENCRYPT) 584 extern int EncryptAutoEnc P((int)); 585 extern int EncryptAutoDec P((int)); 586 extern int EncryptDebug P((int)); 587 extern int EncryptVerbose P((int)); 588 #endif 589 590 struct togglelist { 591 char *name; /* name of toggle */ 592 char *help; /* help message */ 593 int (*handler)(); /* routine to do actual setting */ 594 int *variable; 595 char *actionexplanation; 596 }; 597 598 static struct togglelist Togglelist[] = { 599 { "autoflush", 600 "flushing of output when sending interrupt characters", 601 0, 602 &autoflush, 603 "flush output when sending interrupt characters" }, 604 { "autosynch", 605 "automatic sending of interrupt characters in urgent mode", 606 0, 607 &autosynch, 608 "send interrupt characters in urgent mode" }, 609 #if defined(AUTHENTICATE) 610 { "autologin", 611 "automatic sending of login and/or authentication info", 612 0, 613 &autologin, 614 "send login name and/or authentication information" }, 615 { "authdebug", 616 "Toggle authentication debugging", 617 auth_togdebug, 618 0, 619 "print authentication debugging information" }, 620 #endif 621 #if defined(ENCRYPT) 622 { "autoencrypt", 623 "automatic encryption of data stream", 624 EncryptAutoEnc, 625 0, 626 "automatically encrypt output" }, 627 { "autodecrypt", 628 "automatic decryption of data stream", 629 EncryptAutoDec, 630 0, 631 "automatically decrypt input" }, 632 { "verbose_encrypt", 633 "Toggle verbose encryption output", 634 EncryptVerbose, 635 0, 636 "print verbose encryption output" }, 637 { "encdebug", 638 "Toggle encryption debugging", 639 EncryptDebug, 640 0, 641 "print encryption debugging information" }, 642 #endif 643 { "skiprc", 644 "don't read ~/.telnetrc file", 645 0, 646 &skiprc, 647 "read ~/.telnetrc file" }, 648 { "binary", 649 "sending and receiving of binary data", 650 togbinary, 651 0, 652 0 }, 653 { "inbinary", 654 "receiving of binary data", 655 togrbinary, 656 0, 657 0 }, 658 { "outbinary", 659 "sending of binary data", 660 togxbinary, 661 0, 662 0 }, 663 { "crlf", 664 "sending carriage returns as telnet <CR><LF>", 665 togcrlf, 666 &crlf, 667 0 }, 668 { "crmod", 669 "mapping of received carriage returns", 670 0, 671 &crmod, 672 "map carriage return on output" }, 673 { "localchars", 674 "local recognition of certain control characters", 675 lclchars, 676 &localchars, 677 "recognize certain control characters" }, 678 { " ", "", 0 }, /* empty line */ 679 #if defined(unix) && defined(TN3270) 680 { "apitrace", 681 "(debugging) toggle tracing of API transactions", 682 0, 683 &apitrace, 684 "trace API transactions" }, 685 { "cursesdata", 686 "(debugging) toggle printing of hexadecimal curses data", 687 0, 688 &cursesdata, 689 "print hexadecimal representation of curses data" }, 690 #endif /* defined(unix) && defined(TN3270) */ 691 { "debug", 692 "debugging", 693 togdebug, 694 &debug, 695 "turn on socket level debugging" }, 696 { "netdata", 697 "printing of hexadecimal network data (debugging)", 698 0, 699 &netdata, 700 "print hexadecimal representation of network traffic" }, 701 { "prettydump", 702 "output of \"netdata\" to user readable format (debugging)", 703 0, 704 &prettydump, 705 "print user readable output for \"netdata\"" }, 706 { "options", 707 "viewing of options processing (debugging)", 708 0, 709 &showoptions, 710 "show option processing" }, 711 #if defined(unix) 712 { "termdata", 713 "(debugging) toggle printing of hexadecimal terminal data", 714 0, 715 &termdata, 716 "print hexadecimal representation of terminal traffic" }, 717 #endif /* defined(unix) */ 718 { "?", 719 0, 720 togglehelp }, 721 { "help", 722 0, 723 togglehelp }, 724 { 0 } 725 }; 726 727 static int 728 togglehelp() 729 { 730 struct togglelist *c; 731 732 for (c = Togglelist; c->name; c++) { 733 if (c->help) { 734 if (*c->help) 735 printf("%-15s toggle %s\n", c->name, c->help); 736 else 737 printf("\n"); 738 } 739 } 740 printf("\n"); 741 printf("%-15s %s\n", "?", "display help information"); 742 return 0; 743 } 744 745 static void 746 settogglehelp(set) 747 int set; 748 { 749 struct togglelist *c; 750 751 for (c = Togglelist; c->name; c++) { 752 if (c->help) { 753 if (*c->help) 754 printf("%-15s %s %s\n", c->name, set ? "enable" : "disable", 755 c->help); 756 else 757 printf("\n"); 758 } 759 } 760 } 761 762 #define GETTOGGLE(name) (struct togglelist *) \ 763 genget(name, (char **) Togglelist, sizeof(struct togglelist)) 764 765 static int 766 toggle(argc, argv) 767 int argc; 768 char *argv[]; 769 { 770 int retval = 1; 771 char *name; 772 struct togglelist *c; 773 774 if (argc < 2) { 775 fprintf(stderr, 776 "Need an argument to 'toggle' command. 'toggle ?' for help.\n"); 777 return 0; 778 } 779 argc--; 780 argv++; 781 while (argc--) { 782 name = *argv++; 783 c = GETTOGGLE(name); 784 if (Ambiguous(c)) { 785 fprintf(stderr, "'%s': ambiguous argument ('toggle ?' for help).\n", 786 name); 787 return 0; 788 } else if (c == 0) { 789 fprintf(stderr, "'%s': unknown argument ('toggle ?' for help).\n", 790 name); 791 return 0; 792 } else { 793 if (c->variable) { 794 *c->variable = !*c->variable; /* invert it */ 795 if (c->actionexplanation) { 796 printf("%s %s.\n", *c->variable? "Will" : "Won't", 797 c->actionexplanation); 798 } 799 } 800 if (c->handler) { 801 retval &= (*c->handler)(-1); 802 } 803 } 804 } 805 return retval; 806 } 807 808 /* 809 * The following perform the "set" command. 810 */ 811 812 #ifdef USE_TERMIO 813 struct termio new_tc = { 0 }; 814 #endif 815 816 struct setlist { 817 char *name; /* name */ 818 char *help; /* help information */ 819 void (*handler)(); 820 cc_t *charp; /* where it is located at */ 821 }; 822 823 static struct setlist Setlist[] = { 824 #ifdef KLUDGELINEMODE 825 { "echo", "character to toggle local echoing on/off", 0, &echoc }, 826 #endif 827 { "escape", "character to escape back to telnet command mode", 0, &escape }, 828 { "rlogin", "rlogin escape character", 0, &rlogin }, 829 { "tracefile", "file to write trace information to", SetNetTrace, (cc_t *)NetTraceFile}, 830 { " ", "" }, 831 { " ", "The following need 'localchars' to be toggled true", 0, 0 }, 832 { "flushoutput", "character to cause an Abort Output", 0, termFlushCharp }, 833 { "interrupt", "character to cause an Interrupt Process", 0, termIntCharp }, 834 { "quit", "character to cause an Abort process", 0, termQuitCharp }, 835 { "eof", "character to cause an EOF ", 0, termEofCharp }, 836 { " ", "" }, 837 { " ", "The following are for local editing in linemode", 0, 0 }, 838 { "erase", "character to use to erase a character", 0, termEraseCharp }, 839 { "kill", "character to use to erase a line", 0, termKillCharp }, 840 { "lnext", "character to use for literal next", 0, termLiteralNextCharp }, 841 { "susp", "character to cause a Suspend Process", 0, termSuspCharp }, 842 { "reprint", "character to use for line reprint", 0, termRprntCharp }, 843 { "worderase", "character to use to erase a word", 0, termWerasCharp }, 844 { "start", "character to use for XON", 0, termStartCharp }, 845 { "stop", "character to use for XOFF", 0, termStopCharp }, 846 { "forw1", "alternate end of line character", 0, termForw1Charp }, 847 { "forw2", "alternate end of line character", 0, termForw2Charp }, 848 { "ayt", "alternate AYT character", 0, termAytCharp }, 849 { 0 } 850 }; 851 852 #if defined(CRAY) && !defined(__STDC__) 853 /* Work around compiler bug in pcc 4.1.5 */ 854 void 855 _setlist_init() 856 { 857 #ifndef KLUDGELINEMODE 858 #define N 5 859 #else 860 #define N 6 861 #endif 862 Setlist[N+0].charp = &termFlushChar; 863 Setlist[N+1].charp = &termIntChar; 864 Setlist[N+2].charp = &termQuitChar; 865 Setlist[N+3].charp = &termEofChar; 866 Setlist[N+6].charp = &termEraseChar; 867 Setlist[N+7].charp = &termKillChar; 868 Setlist[N+8].charp = &termLiteralNextChar; 869 Setlist[N+9].charp = &termSuspChar; 870 Setlist[N+10].charp = &termRprntChar; 871 Setlist[N+11].charp = &termWerasChar; 872 Setlist[N+12].charp = &termStartChar; 873 Setlist[N+13].charp = &termStopChar; 874 Setlist[N+14].charp = &termForw1Char; 875 Setlist[N+15].charp = &termForw2Char; 876 Setlist[N+16].charp = &termAytChar; 877 #undef N 878 } 879 #endif /* defined(CRAY) && !defined(__STDC__) */ 880 881 static struct setlist * 882 getset(name) 883 char *name; 884 { 885 return (struct setlist *) 886 genget(name, (char **) Setlist, sizeof(struct setlist)); 887 } 888 889 void 890 set_escape_char(s) 891 char *s; 892 { 893 if (rlogin != _POSIX_VDISABLE) { 894 rlogin = (s && *s) ? special(s) : _POSIX_VDISABLE; 895 printf("Telnet rlogin escape character is '%s'.\n", 896 control(rlogin)); 897 } else { 898 escape = (s && *s) ? special(s) : _POSIX_VDISABLE; 899 printf("Telnet escape character is '%s'.\n", control(escape)); 900 } 901 } 902 903 static int 904 setcmd(argc, argv) 905 int argc; 906 char *argv[]; 907 { 908 int value; 909 struct setlist *ct; 910 struct togglelist *c; 911 912 if (argc < 2 || argc > 3) { 913 printf("Format is 'set Name Value'\n'set ?' for help.\n"); 914 return 0; 915 } 916 if ((argc == 2) && (isprefix(argv[1], "?") || isprefix(argv[1], "help"))) { 917 for (ct = Setlist; ct->name; ct++) 918 printf("%-15s %s\n", ct->name, ct->help); 919 printf("\n"); 920 settogglehelp(1); 921 printf("%-15s %s\n", "?", "display help information"); 922 return 0; 923 } 924 925 ct = getset(argv[1]); 926 if (ct == 0) { 927 c = GETTOGGLE(argv[1]); 928 if (c == 0) { 929 fprintf(stderr, "'%s': unknown argument ('set ?' for help).\n", 930 argv[1]); 931 return 0; 932 } else if (Ambiguous(c)) { 933 fprintf(stderr, "'%s': ambiguous argument ('set ?' for help).\n", 934 argv[1]); 935 return 0; 936 } 937 if (c->variable) { 938 if ((argc == 2) || (strcmp("on", argv[2]) == 0)) 939 *c->variable = 1; 940 else if (strcmp("off", argv[2]) == 0) 941 *c->variable = 0; 942 else { 943 printf("Format is 'set togglename [on|off]'\n'set ?' for help.\n"); 944 return 0; 945 } 946 if (c->actionexplanation) { 947 printf("%s %s.\n", *c->variable? "Will" : "Won't", 948 c->actionexplanation); 949 } 950 } 951 if (c->handler) 952 (*c->handler)(1); 953 } else if (argc != 3) { 954 printf("Format is 'set Name Value'\n'set ?' for help.\n"); 955 return 0; 956 } else if (Ambiguous(ct)) { 957 fprintf(stderr, "'%s': ambiguous argument ('set ?' for help).\n", 958 argv[1]); 959 return 0; 960 } else if (ct->handler) { 961 (*ct->handler)(argv[2]); 962 printf("%s set to \"%s\".\n", ct->name, (char *)ct->charp); 963 } else { 964 if (strcmp("off", argv[2])) { 965 value = special(argv[2]); 966 } else { 967 value = _POSIX_VDISABLE; 968 } 969 *(ct->charp) = (cc_t)value; 970 printf("%s character is '%s'.\n", ct->name, control(*(ct->charp))); 971 } 972 slc_check(); 973 return 1; 974 } 975 976 static int 977 unsetcmd(argc, argv) 978 int argc; 979 char *argv[]; 980 { 981 struct setlist *ct; 982 struct togglelist *c; 983 register char *name; 984 985 if (argc < 2) { 986 fprintf(stderr, 987 "Need an argument to 'unset' command. 'unset ?' for help.\n"); 988 return 0; 989 } 990 if (isprefix(argv[1], "?") || isprefix(argv[1], "help")) { 991 for (ct = Setlist; ct->name; ct++) 992 printf("%-15s %s\n", ct->name, ct->help); 993 printf("\n"); 994 settogglehelp(0); 995 printf("%-15s %s\n", "?", "display help information"); 996 return 0; 997 } 998 999 argc--; 1000 argv++; 1001 while (argc--) { 1002 name = *argv++; 1003 ct = getset(name); 1004 if (ct == 0) { 1005 c = GETTOGGLE(name); 1006 if (c == 0) { 1007 fprintf(stderr, "'%s': unknown argument ('unset ?' for help).\n", 1008 name); 1009 return 0; 1010 } else if (Ambiguous(c)) { 1011 fprintf(stderr, "'%s': ambiguous argument ('unset ?' for help).\n", 1012 name); 1013 return 0; 1014 } 1015 if (c->variable) { 1016 *c->variable = 0; 1017 if (c->actionexplanation) { 1018 printf("%s %s.\n", *c->variable? "Will" : "Won't", 1019 c->actionexplanation); 1020 } 1021 } 1022 if (c->handler) 1023 (*c->handler)(0); 1024 } else if (Ambiguous(ct)) { 1025 fprintf(stderr, "'%s': ambiguous argument ('unset ?' for help).\n", 1026 name); 1027 return 0; 1028 } else if (ct->handler) { 1029 (*ct->handler)(0); 1030 printf("%s reset to \"%s\".\n", ct->name, (char *)ct->charp); 1031 } else { 1032 *(ct->charp) = _POSIX_VDISABLE; 1033 printf("%s character is '%s'.\n", ct->name, control(*(ct->charp))); 1034 } 1035 } 1036 return 1; 1037 } 1038 1039 /* 1040 * The following are the data structures and routines for the 1041 * 'mode' command. 1042 */ 1043 #ifdef KLUDGELINEMODE 1044 extern int kludgelinemode; 1045 1046 static int 1047 dokludgemode() 1048 { 1049 kludgelinemode = 1; 1050 send_wont(TELOPT_LINEMODE, 1); 1051 send_dont(TELOPT_SGA, 1); 1052 send_dont(TELOPT_ECHO, 1); 1053 } 1054 #endif 1055 1056 static int 1057 dolinemode() 1058 { 1059 #ifdef KLUDGELINEMODE 1060 if (kludgelinemode) 1061 send_dont(TELOPT_SGA, 1); 1062 #endif 1063 send_will(TELOPT_LINEMODE, 1); 1064 send_dont(TELOPT_ECHO, 1); 1065 return 1; 1066 } 1067 1068 static int 1069 docharmode() 1070 { 1071 #ifdef KLUDGELINEMODE 1072 if (kludgelinemode) 1073 send_do(TELOPT_SGA, 1); 1074 else 1075 #endif 1076 send_wont(TELOPT_LINEMODE, 1); 1077 send_do(TELOPT_ECHO, 1); 1078 return 1; 1079 } 1080 1081 static int 1082 dolmmode(bit, on) 1083 int bit, on; 1084 { 1085 unsigned char c; 1086 extern int linemode; 1087 1088 if (my_want_state_is_wont(TELOPT_LINEMODE)) { 1089 printf("?Need to have LINEMODE option enabled first.\n"); 1090 printf("'mode ?' for help.\n"); 1091 return 0; 1092 } 1093 1094 if (on) 1095 c = (linemode | bit); 1096 else 1097 c = (linemode & ~bit); 1098 lm_mode(&c, 1, 1); 1099 return 1; 1100 } 1101 1102 int 1103 setmode(bit) 1104 { 1105 return dolmmode(bit, 1); 1106 } 1107 1108 int 1109 clearmode(bit) 1110 { 1111 return dolmmode(bit, 0); 1112 } 1113 1114 struct modelist { 1115 char *name; /* command name */ 1116 char *help; /* help string */ 1117 int (*handler)(); /* routine which executes command */ 1118 int needconnect; /* Do we need to be connected to execute? */ 1119 int arg1; 1120 }; 1121 1122 extern int modehelp(); 1123 1124 static struct modelist ModeList[] = { 1125 { "character", "Disable LINEMODE option", docharmode, 1 }, 1126 #ifdef KLUDGELINEMODE 1127 { "", "(or disable obsolete line-by-line mode)", 0 }, 1128 #endif 1129 { "line", "Enable LINEMODE option", dolinemode, 1 }, 1130 #ifdef KLUDGELINEMODE 1131 { "", "(or enable obsolete line-by-line mode)", 0 }, 1132 #endif 1133 { "", "", 0 }, 1134 { "", "These require the LINEMODE option to be enabled", 0 }, 1135 { "isig", "Enable signal trapping", setmode, 1, MODE_TRAPSIG }, 1136 { "+isig", 0, setmode, 1, MODE_TRAPSIG }, 1137 { "-isig", "Disable signal trapping", clearmode, 1, MODE_TRAPSIG }, 1138 { "edit", "Enable character editing", setmode, 1, MODE_EDIT }, 1139 { "+edit", 0, setmode, 1, MODE_EDIT }, 1140 { "-edit", "Disable character editing", clearmode, 1, MODE_EDIT }, 1141 { "softtabs", "Enable tab expansion", setmode, 1, MODE_SOFT_TAB }, 1142 { "+softtabs", 0, setmode, 1, MODE_SOFT_TAB }, 1143 { "-softtabs", "Disable character editing", clearmode, 1, MODE_SOFT_TAB }, 1144 { "litecho", "Enable literal character echo", setmode, 1, MODE_LIT_ECHO }, 1145 { "+litecho", 0, setmode, 1, MODE_LIT_ECHO }, 1146 { "-litecho", "Disable literal character echo", clearmode, 1, MODE_LIT_ECHO }, 1147 { "help", 0, modehelp, 0 }, 1148 #ifdef KLUDGELINEMODE 1149 { "kludgeline", 0, dokludgemode, 1 }, 1150 #endif 1151 { "", "", 0 }, 1152 { "?", "Print help information", modehelp, 0 }, 1153 { 0 }, 1154 }; 1155 1156 1157 int 1158 modehelp() 1159 { 1160 struct modelist *mt; 1161 1162 printf("format is: 'mode Mode', where 'Mode' is one of:\n\n"); 1163 for (mt = ModeList; mt->name; mt++) { 1164 if (mt->help) { 1165 if (*mt->help) 1166 printf("%-15s %s\n", mt->name, mt->help); 1167 else 1168 printf("\n"); 1169 } 1170 } 1171 return 0; 1172 } 1173 1174 #define GETMODECMD(name) (struct modelist *) \ 1175 genget(name, (char **) ModeList, sizeof(struct modelist)) 1176 1177 static int 1178 modecmd(argc, argv) 1179 int argc; 1180 char *argv[]; 1181 { 1182 struct modelist *mt; 1183 1184 if (argc != 2) { 1185 printf("'mode' command requires an argument\n"); 1186 printf("'mode ?' for help.\n"); 1187 } else if ((mt = GETMODECMD(argv[1])) == 0) { 1188 fprintf(stderr, "Unknown mode '%s' ('mode ?' for help).\n", argv[1]); 1189 } else if (Ambiguous(mt)) { 1190 fprintf(stderr, "Ambiguous mode '%s' ('mode ?' for help).\n", argv[1]); 1191 } else if (mt->needconnect && !connected) { 1192 printf("?Need to be connected first.\n"); 1193 printf("'mode ?' for help.\n"); 1194 } else if (mt->handler) { 1195 return (*mt->handler)(mt->arg1); 1196 } 1197 return 0; 1198 } 1199 1200 /* 1201 * The following data structures and routines implement the 1202 * "display" command. 1203 */ 1204 1205 static int 1206 display(argc, argv) 1207 int argc; 1208 char *argv[]; 1209 { 1210 struct togglelist *tl; 1211 struct setlist *sl; 1212 1213 #define dotog(tl) if (tl->variable && tl->actionexplanation) { \ 1214 if (*tl->variable) { \ 1215 printf("will"); \ 1216 } else { \ 1217 printf("won't"); \ 1218 } \ 1219 printf(" %s.\n", tl->actionexplanation); \ 1220 } 1221 1222 #define doset(sl) if (sl->name && *sl->name != ' ') { \ 1223 if (sl->handler == 0) \ 1224 printf("%-15s [%s]\n", sl->name, control(*sl->charp)); \ 1225 else \ 1226 printf("%-15s \"%s\"\n", sl->name, (char *)sl->charp); \ 1227 } 1228 1229 if (argc == 1) { 1230 for (tl = Togglelist; tl->name; tl++) { 1231 dotog(tl); 1232 } 1233 printf("\n"); 1234 for (sl = Setlist; sl->name; sl++) { 1235 doset(sl); 1236 } 1237 } else { 1238 int i; 1239 1240 for (i = 1; i < argc; i++) { 1241 sl = getset(argv[i]); 1242 tl = GETTOGGLE(argv[i]); 1243 if (Ambiguous(sl) || Ambiguous(tl)) { 1244 printf("?Ambiguous argument '%s'.\n", argv[i]); 1245 return 0; 1246 } else if (!sl && !tl) { 1247 printf("?Unknown argument '%s'.\n", argv[i]); 1248 return 0; 1249 } else { 1250 if (tl) { 1251 dotog(tl); 1252 } 1253 if (sl) { 1254 doset(sl); 1255 } 1256 } 1257 } 1258 } 1259 /*@*/optionstatus(); 1260 #if defined(ENCRYPT) 1261 EncryptStatus(); 1262 #endif 1263 return 1; 1264 #undef doset 1265 #undef dotog 1266 } 1267 1268 /* 1269 * The following are the data structures, and many of the routines, 1270 * relating to command processing. 1271 */ 1272 1273 /* 1274 * Set the escape character. 1275 */ 1276 static int 1277 setescape(argc, argv) 1278 int argc; 1279 char *argv[]; 1280 { 1281 register char *arg; 1282 char buf[50]; 1283 1284 printf( 1285 "Deprecated usage - please use 'set escape%s%s' in the future.\n", 1286 (argc > 2)? " ":"", (argc > 2)? argv[1]: ""); 1287 if (argc > 2) 1288 arg = argv[1]; 1289 else { 1290 printf("new escape character: "); 1291 (void) fgets(buf, sizeof(buf), stdin); 1292 arg = buf; 1293 } 1294 if (arg[0] != '\0') 1295 escape = arg[0]; 1296 if (!In3270) { 1297 printf("Escape character is '%s'.\n", control(escape)); 1298 } 1299 (void) fflush(stdout); 1300 return 1; 1301 } 1302 1303 /*VARARGS*/ 1304 static int 1305 togcrmod() 1306 { 1307 crmod = !crmod; 1308 printf("Deprecated usage - please use 'toggle crmod' in the future.\n"); 1309 printf("%s map carriage return on output.\n", crmod ? "Will" : "Won't"); 1310 (void) fflush(stdout); 1311 return 1; 1312 } 1313 1314 /*VARARGS*/ 1315 int 1316 suspend() 1317 { 1318 #ifdef SIGTSTP 1319 setcommandmode(); 1320 { 1321 long oldrows, oldcols, newrows, newcols, err; 1322 1323 err = TerminalWindowSize(&oldrows, &oldcols); 1324 (void) kill(0, SIGTSTP); 1325 err += TerminalWindowSize(&newrows, &newcols); 1326 if (connected && !err && 1327 ((oldrows != newrows) || (oldcols != newcols))) { 1328 sendnaws(); 1329 } 1330 } 1331 /* reget parameters in case they were changed */ 1332 TerminalSaveState(); 1333 setconnmode(0); 1334 #else 1335 printf("Suspend is not supported. Try the '!' command instead\n"); 1336 #endif 1337 return 1; 1338 } 1339 1340 #if !defined(TN3270) 1341 /*ARGSUSED*/ 1342 int 1343 shell(argc, argv) 1344 int argc; 1345 char *argv[]; 1346 { 1347 setcommandmode(); 1348 switch(vfork()) { 1349 case -1: 1350 perror("Fork failed\n"); 1351 break; 1352 1353 case 0: 1354 { 1355 /* 1356 * Fire up the shell in the child. 1357 */ 1358 register char *shellp, *shellname; 1359 extern char *rindex(); 1360 1361 shellp = getenv("SHELL"); 1362 if (shellp == NULL) 1363 shellp = "/bin/sh"; 1364 if ((shellname = rindex(shellp, '/')) == 0) 1365 shellname = shellp; 1366 else 1367 shellname++; 1368 if (argc > 1) 1369 execl(shellp, shellname, "-c", &saveline[1], 0); 1370 else 1371 execl(shellp, shellname, 0); 1372 perror("Execl"); 1373 _exit(1); 1374 } 1375 default: 1376 (void)wait((int *)0); /* Wait for the shell to complete */ 1377 } 1378 return 1; 1379 } 1380 #endif /* !defined(TN3270) */ 1381 1382 /*VARARGS*/ 1383 static 1384 bye(argc, argv) 1385 int argc; /* Number of arguments */ 1386 char *argv[]; /* arguments */ 1387 { 1388 extern int resettermname; 1389 1390 if (connected) { 1391 (void) shutdown(net, 2); 1392 printf("Connection closed.\n"); 1393 (void) NetClose(net); 1394 connected = 0; 1395 resettermname = 1; 1396 #if defined(AUTHENTICATE) || defined(ENCRYPT) 1397 auth_encrypt_connect(connected); 1398 #endif 1399 /* reset options */ 1400 tninit(); 1401 #if defined(TN3270) 1402 SetIn3270(); /* Get out of 3270 mode */ 1403 #endif /* defined(TN3270) */ 1404 } 1405 if ((argc != 2) || (strcmp(argv[1], "fromquit") != 0)) { 1406 longjmp(toplevel, 1); 1407 /* NOTREACHED */ 1408 } 1409 return 1; /* Keep lint, etc., happy */ 1410 } 1411 1412 /*VARARGS*/ 1413 quit() 1414 { 1415 (void) call(bye, "bye", "fromquit", 0); 1416 Exit(0); 1417 /*NOTREACHED*/ 1418 } 1419 1420 /*VARARGS*/ 1421 int 1422 logout() 1423 { 1424 send_do(TELOPT_LOGOUT, 1); 1425 (void) netflush(); 1426 return 1; 1427 } 1428 1429 1430 /* 1431 * The SLC command. 1432 */ 1433 1434 struct slclist { 1435 char *name; 1436 char *help; 1437 void (*handler)(); 1438 int arg; 1439 }; 1440 1441 static void slc_help(); 1442 1443 struct slclist SlcList[] = { 1444 { "export", "Use local special character definitions", 1445 slc_mode_export, 0 }, 1446 { "import", "Use remote special character definitions", 1447 slc_mode_import, 1 }, 1448 { "check", "Verify remote special character definitions", 1449 slc_mode_import, 0 }, 1450 { "help", 0, slc_help, 0 }, 1451 { "?", "Print help information", slc_help, 0 }, 1452 { 0 }, 1453 }; 1454 1455 static void 1456 slc_help() 1457 { 1458 struct slclist *c; 1459 1460 for (c = SlcList; c->name; c++) { 1461 if (c->help) { 1462 if (*c->help) 1463 printf("%-15s %s\n", c->name, c->help); 1464 else 1465 printf("\n"); 1466 } 1467 } 1468 } 1469 1470 static struct slclist * 1471 getslc(name) 1472 char *name; 1473 { 1474 return (struct slclist *) 1475 genget(name, (char **) SlcList, sizeof(struct slclist)); 1476 } 1477 1478 static 1479 slccmd(argc, argv) 1480 int argc; 1481 char *argv[]; 1482 { 1483 struct slclist *c; 1484 1485 if (argc != 2) { 1486 fprintf(stderr, 1487 "Need an argument to 'slc' command. 'slc ?' for help.\n"); 1488 return 0; 1489 } 1490 c = getslc(argv[1]); 1491 if (c == 0) { 1492 fprintf(stderr, "'%s': unknown argument ('slc ?' for help).\n", 1493 argv[1]); 1494 return 0; 1495 } 1496 if (Ambiguous(c)) { 1497 fprintf(stderr, "'%s': ambiguous argument ('slc ?' for help).\n", 1498 argv[1]); 1499 return 0; 1500 } 1501 (*c->handler)(c->arg); 1502 slcstate(); 1503 return 1; 1504 } 1505 1506 /* 1507 * The ENVIRON command. 1508 */ 1509 1510 struct envlist { 1511 char *name; 1512 char *help; 1513 void (*handler)(); 1514 int narg; 1515 }; 1516 1517 extern struct env_lst * 1518 env_define P((unsigned char *, unsigned char *)); 1519 extern void 1520 env_undefine P((unsigned char *)), 1521 env_export P((unsigned char *)), 1522 env_unexport P((unsigned char *)), 1523 env_send P((unsigned char *)), 1524 env_list P((void)); 1525 static void 1526 env_help P((void)); 1527 1528 struct envlist EnvList[] = { 1529 { "define", "Define an environment variable", 1530 (void (*)())env_define, 2 }, 1531 { "undefine", "Undefine an environment variable", 1532 env_undefine, 1 }, 1533 { "export", "Mark an environment variable for automatic export", 1534 env_export, 1 }, 1535 { "unexport", "Don't mark an environment variable for automatic export", 1536 env_unexport, 1 }, 1537 { "send", "Send an environment variable", env_send, 1 }, 1538 { "list", "List the current environment variables", 1539 env_list, 0 }, 1540 { "help", 0, env_help, 0 }, 1541 { "?", "Print help information", env_help, 0 }, 1542 { 0 }, 1543 }; 1544 1545 static void 1546 env_help() 1547 { 1548 struct envlist *c; 1549 1550 for (c = EnvList; c->name; c++) { 1551 if (c->help) { 1552 if (*c->help) 1553 printf("%-15s %s\n", c->name, c->help); 1554 else 1555 printf("\n"); 1556 } 1557 } 1558 } 1559 1560 static struct envlist * 1561 getenvcmd(name) 1562 char *name; 1563 { 1564 return (struct envlist *) 1565 genget(name, (char **) EnvList, sizeof(struct envlist)); 1566 } 1567 1568 env_cmd(argc, argv) 1569 int argc; 1570 char *argv[]; 1571 { 1572 struct envlist *c; 1573 1574 if (argc < 2) { 1575 fprintf(stderr, 1576 "Need an argument to 'environ' command. 'environ ?' for help.\n"); 1577 return 0; 1578 } 1579 c = getenvcmd(argv[1]); 1580 if (c == 0) { 1581 fprintf(stderr, "'%s': unknown argument ('environ ?' for help).\n", 1582 argv[1]); 1583 return 0; 1584 } 1585 if (Ambiguous(c)) { 1586 fprintf(stderr, "'%s': ambiguous argument ('environ ?' for help).\n", 1587 argv[1]); 1588 return 0; 1589 } 1590 if (c->narg + 2 != argc) { 1591 fprintf(stderr, 1592 "Need %s%d argument%s to 'environ %s' command. 'environ ?' for help.\n", 1593 c->narg < argc + 2 ? "only " : "", 1594 c->narg, c->narg == 1 ? "" : "s", c->name); 1595 return 0; 1596 } 1597 (*c->handler)(argv[2], argv[3]); 1598 return 1; 1599 } 1600 1601 struct env_lst { 1602 struct env_lst *next; /* pointer to next structure */ 1603 struct env_lst *prev; /* pointer to next structure */ 1604 unsigned char *var; /* pointer to variable name */ 1605 unsigned char *value; /* pointer to varialbe value */ 1606 int export; /* 1 -> export with default list of variables */ 1607 }; 1608 1609 struct env_lst envlisthead; 1610 1611 struct env_lst * 1612 env_find(var) 1613 unsigned char *var; 1614 { 1615 register struct env_lst *ep; 1616 1617 for (ep = envlisthead.next; ep; ep = ep->next) { 1618 if (strcmp((char *)ep->var, (char *)var) == 0) 1619 return(ep); 1620 } 1621 return(NULL); 1622 } 1623 1624 void 1625 env_init() 1626 { 1627 extern char **environ; 1628 register char **epp, *cp; 1629 register struct env_lst *ep; 1630 extern char *index(); 1631 1632 for (epp = environ; *epp; epp++) { 1633 if (cp = index(*epp, '=')) { 1634 *cp = '\0'; 1635 ep = env_define((unsigned char *)*epp, 1636 (unsigned char *)cp+1); 1637 ep->export = 0; 1638 *cp = '='; 1639 } 1640 } 1641 /* 1642 * Special case for DISPLAY variable. If it is ":0.0" or 1643 * "unix:0.0", we have to get rid of "unix" and insert our 1644 * hostname. 1645 */ 1646 if ((ep = env_find("DISPLAY")) 1647 && ((*ep->value == ':') 1648 || (strncmp((char *)ep->value, "unix:", 5) == 0))) { 1649 char hbuf[256+1]; 1650 char *cp2 = index((char *)ep->value, ':'); 1651 1652 gethostname(hbuf, 256); 1653 hbuf[256] = '\0'; 1654 cp = (char *)malloc(strlen(hbuf) + strlen(cp2) + 1); 1655 sprintf((char *)cp, "%s%s", hbuf, cp2); 1656 free(ep->value); 1657 ep->value = (unsigned char *)cp; 1658 } 1659 /* 1660 * If USER is not defined, but LOGNAME is, then add 1661 * USER with the value from LOGNAME. By default, we 1662 * don't export the USER variable. 1663 */ 1664 if ((env_find("USER") == NULL) && (ep = env_find("LOGNAME"))) { 1665 env_define((unsigned char *)"USER", ep->value); 1666 env_unexport((unsigned char *)"USER"); 1667 } 1668 env_export((unsigned char *)"DISPLAY"); 1669 env_export((unsigned char *)"PRINTER"); 1670 } 1671 1672 struct env_lst * 1673 env_define(var, value) 1674 unsigned char *var, *value; 1675 { 1676 register struct env_lst *ep; 1677 1678 if (ep = env_find(var)) { 1679 if (ep->var) 1680 free(ep->var); 1681 if (ep->value) 1682 free(ep->value); 1683 } else { 1684 ep = (struct env_lst *)malloc(sizeof(struct env_lst)); 1685 ep->next = envlisthead.next; 1686 envlisthead.next = ep; 1687 ep->prev = &envlisthead; 1688 if (ep->next) 1689 ep->next->prev = ep; 1690 } 1691 ep->export = 1; 1692 ep->var = (unsigned char *)strdup((char *)var); 1693 ep->value = (unsigned char *)strdup((char *)value); 1694 return(ep); 1695 } 1696 1697 void 1698 env_undefine(var) 1699 unsigned char *var; 1700 { 1701 register struct env_lst *ep; 1702 1703 if (ep = env_find(var)) { 1704 ep->prev->next = ep->next; 1705 if (ep->next) 1706 ep->next->prev = ep->prev; 1707 if (ep->var) 1708 free(ep->var); 1709 if (ep->value) 1710 free(ep->value); 1711 free(ep); 1712 } 1713 } 1714 1715 void 1716 env_export(var) 1717 unsigned char *var; 1718 { 1719 register struct env_lst *ep; 1720 1721 if (ep = env_find(var)) 1722 ep->export = 1; 1723 } 1724 1725 void 1726 env_unexport(var) 1727 unsigned char *var; 1728 { 1729 register struct env_lst *ep; 1730 1731 if (ep = env_find(var)) 1732 ep->export = 0; 1733 } 1734 1735 void 1736 env_send(var) 1737 unsigned char *var; 1738 { 1739 register struct env_lst *ep; 1740 1741 if (my_state_is_wont(TELOPT_ENVIRON)) { 1742 fprintf(stderr, 1743 "Cannot send '%s': Telnet ENVIRON option not enabled\n", 1744 var); 1745 return; 1746 } 1747 ep = env_find(var); 1748 if (ep == 0) { 1749 fprintf(stderr, "Cannot send '%s': variable not defined\n", 1750 var); 1751 return; 1752 } 1753 env_opt_start_info(); 1754 env_opt_add(ep->var); 1755 env_opt_end(0); 1756 } 1757 1758 void 1759 env_list() 1760 { 1761 register struct env_lst *ep; 1762 1763 for (ep = envlisthead.next; ep; ep = ep->next) { 1764 printf("%c %-20s %s\n", ep->export ? '*' : ' ', 1765 ep->var, ep->value); 1766 } 1767 } 1768 1769 unsigned char * 1770 env_default(init) 1771 int init; 1772 { 1773 static struct env_lst *nep = NULL; 1774 1775 if (init) { 1776 nep = &envlisthead; 1777 return; 1778 } 1779 if (nep) { 1780 while (nep = nep->next) { 1781 if (nep->export) 1782 return(nep->var); 1783 } 1784 } 1785 return(NULL); 1786 } 1787 1788 unsigned char * 1789 env_getvalue(var) 1790 unsigned char *var; 1791 { 1792 register struct env_lst *ep; 1793 1794 if (ep = env_find(var)) 1795 return(ep->value); 1796 return(NULL); 1797 } 1798 1799 #if defined(AUTHENTICATE) 1800 /* 1801 * The AUTHENTICATE command. 1802 */ 1803 1804 struct authlist { 1805 char *name; 1806 char *help; 1807 int (*handler)(); 1808 int narg; 1809 }; 1810 1811 extern int 1812 auth_enable P((int)), 1813 auth_disable P((int)), 1814 auth_status P((void)); 1815 static int 1816 auth_help P((void)); 1817 1818 struct authlist AuthList[] = { 1819 { "status", "Display current status of authentication information", 1820 auth_status, 0 }, 1821 { "disable", "Disable an authentication type ('auth disable ?' for more)", 1822 auth_disable, 1 }, 1823 { "enable", "Enable an authentication type ('auth enable ?' for more)", 1824 auth_enable, 1 }, 1825 { "help", 0, auth_help, 0 }, 1826 { "?", "Print help information", auth_help, 0 }, 1827 { 0 }, 1828 }; 1829 1830 static int 1831 auth_help() 1832 { 1833 struct authlist *c; 1834 1835 for (c = AuthList; c->name; c++) { 1836 if (c->help) { 1837 if (*c->help) 1838 printf("%-15s %s\n", c->name, c->help); 1839 else 1840 printf("\n"); 1841 } 1842 } 1843 return 0; 1844 } 1845 1846 auth_cmd(argc, argv) 1847 int argc; 1848 char *argv[]; 1849 { 1850 struct authlist *c; 1851 1852 c = (struct authlist *) 1853 genget(argv[1], (char **) AuthList, sizeof(struct authlist)); 1854 if (c == 0) { 1855 fprintf(stderr, "'%s': unknown argument ('auth ?' for help).\n", 1856 argv[1]); 1857 return 0; 1858 } 1859 if (Ambiguous(c)) { 1860 fprintf(stderr, "'%s': ambiguous argument ('auth ?' for help).\n", 1861 argv[1]); 1862 return 0; 1863 } 1864 if (c->narg + 2 != argc) { 1865 fprintf(stderr, 1866 "Need %s%d argument%s to 'auth %s' command. 'auth ?' for help.\n", 1867 c->narg < argc + 2 ? "only " : "", 1868 c->narg, c->narg == 1 ? "" : "s", c->name); 1869 return 0; 1870 } 1871 return((*c->handler)(argv[2], argv[3])); 1872 } 1873 #endif 1874 1875 #if defined(ENCRYPT) 1876 /* 1877 * The ENCRYPT command. 1878 */ 1879 1880 struct encryptlist { 1881 char *name; 1882 char *help; 1883 int (*handler)(); 1884 int needconnect; 1885 int minarg; 1886 int maxarg; 1887 }; 1888 1889 extern int 1890 EncryptEnable P((char *, char *)), 1891 EncryptDisable P((char *, char *)), 1892 EncryptType P((char *, char *)), 1893 EncryptStart P((char *)), 1894 EncryptStartInput P((void)), 1895 EncryptStartOutput P((void)), 1896 EncryptStop P((char *)), 1897 EncryptStopInput P((void)), 1898 EncryptStopOutput P((void)), 1899 EncryptStatus P((void)); 1900 static int 1901 EncryptHelp P((void)); 1902 1903 struct encryptlist EncryptList[] = { 1904 { "enable", "Enable encryption. ('encrypt enable ?' for more)", 1905 EncryptEnable, 1, 1, 2 }, 1906 { "disable", "Disable encryption. ('encrypt enable ?' for more)", 1907 EncryptDisable, 0, 1, 2 }, 1908 { "type", "Set encryptiong type. ('encrypt type ?' for more)", 1909 EncryptType, 0, 1, 1 }, 1910 { "start", "Start encryption. ('encrypt start ?' for more)", 1911 EncryptStart, 1, 0, 1 }, 1912 { "stop", "Stop encryption. ('encrypt stop ?' for more)", 1913 EncryptStop, 1, 0, 1 }, 1914 { "input", "Start encrypting the input stream", 1915 EncryptStartInput, 1, 0, 0 }, 1916 { "-input", "Stop encrypting the input stream", 1917 EncryptStopInput, 1, 0, 0 }, 1918 { "output", "Start encrypting the output stream", 1919 EncryptStartOutput, 1, 0, 0 }, 1920 { "-output", "Stop encrypting the output stream", 1921 EncryptStopOutput, 1, 0, 0 }, 1922 1923 { "status", "Display current status of authentication information", 1924 EncryptStatus, 0, 0, 0 }, 1925 { "help", 0, EncryptHelp, 0, 0, 0 }, 1926 { "?", "Print help information", EncryptHelp, 0, 0, 0 }, 1927 { 0 }, 1928 }; 1929 1930 static int 1931 EncryptHelp() 1932 { 1933 struct encryptlist *c; 1934 1935 for (c = EncryptList; c->name; c++) { 1936 if (c->help) { 1937 if (*c->help) 1938 printf("%-15s %s\n", c->name, c->help); 1939 else 1940 printf("\n"); 1941 } 1942 } 1943 return 0; 1944 } 1945 1946 encrypt_cmd(argc, argv) 1947 int argc; 1948 char *argv[]; 1949 { 1950 struct encryptlist *c; 1951 1952 c = (struct encryptlist *) 1953 genget(argv[1], (char **) EncryptList, sizeof(struct encryptlist)); 1954 if (c == 0) { 1955 fprintf(stderr, "'%s': unknown argument ('encrypt ?' for help).\n", 1956 argv[1]); 1957 return 0; 1958 } 1959 if (Ambiguous(c)) { 1960 fprintf(stderr, "'%s': ambiguous argument ('encrypt ?' for help).\n", 1961 argv[1]); 1962 return 0; 1963 } 1964 argc -= 2; 1965 if (argc < c->minarg || argc > c->maxarg) { 1966 if (c->minarg == c->maxarg) { 1967 fprintf(stderr, "Need %s%d argument%s ", 1968 c->minarg < argc ? "only " : "", c->minarg, 1969 c->minarg == 1 ? "" : "s"); 1970 } else { 1971 fprintf(stderr, "Need %s%d-%d arguments ", 1972 c->maxarg < argc ? "only " : "", c->minarg, c->maxarg); 1973 } 1974 fprintf(stderr, "to 'encrypt %s' command. 'encrypt ?' for help.\n", 1975 c->name); 1976 return 0; 1977 } 1978 if (c->needconnect && !connected) { 1979 if (!(argc && (isprefix(argv[2], "help") || isprefix(argv[2], "?")))) { 1980 printf("?Need to be connected first.\n"); 1981 return 0; 1982 } 1983 } 1984 return ((*c->handler)(argc > 0 ? argv[2] : 0, 1985 argc > 1 ? argv[3] : 0, 1986 argc > 2 ? argv[4] : 0)); 1987 } 1988 #endif 1989 1990 #if defined(unix) && defined(TN3270) 1991 static void 1992 filestuff(fd) 1993 int fd; 1994 { 1995 int res; 1996 1997 #ifdef F_GETOWN 1998 setconnmode(0); 1999 res = fcntl(fd, F_GETOWN, 0); 2000 setcommandmode(); 2001 2002 if (res == -1) { 2003 perror("fcntl"); 2004 return; 2005 } 2006 printf("\tOwner is %d.\n", res); 2007 #endif 2008 2009 setconnmode(0); 2010 res = fcntl(fd, F_GETFL, 0); 2011 setcommandmode(); 2012 2013 if (res == -1) { 2014 perror("fcntl"); 2015 return; 2016 } 2017 printf("\tFlags are 0x%x: %s\n", res, decodeflags(res)); 2018 } 2019 #endif /* defined(unix) && defined(TN3270) */ 2020 2021 /* 2022 * Print status about the connection. 2023 */ 2024 /*ARGSUSED*/ 2025 static 2026 status(argc, argv) 2027 int argc; 2028 char *argv[]; 2029 { 2030 if (connected) { 2031 printf("Connected to %s.\n", hostname); 2032 if ((argc < 2) || strcmp(argv[1], "notmuch")) { 2033 int mode = getconnmode(); 2034 2035 if (my_want_state_is_will(TELOPT_LINEMODE)) { 2036 printf("Operating with LINEMODE option\n"); 2037 printf("%s line editing\n", (mode&MODE_EDIT) ? "Local" : "No"); 2038 printf("%s catching of signals\n", 2039 (mode&MODE_TRAPSIG) ? "Local" : "No"); 2040 slcstate(); 2041 #ifdef KLUDGELINEMODE 2042 } else if (kludgelinemode && my_want_state_is_dont(TELOPT_SGA)) { 2043 printf("Operating in obsolete linemode\n"); 2044 #endif 2045 } else { 2046 printf("Operating in single character mode\n"); 2047 if (localchars) 2048 printf("Catching signals locally\n"); 2049 } 2050 printf("%s character echo\n", (mode&MODE_ECHO) ? "Local" : "Remote"); 2051 if (my_want_state_is_will(TELOPT_LFLOW)) 2052 printf("%s flow control\n", (mode&MODE_FLOW) ? "Local" : "No"); 2053 #if defined(ENCRYPT) 2054 encrypt_display(); 2055 #endif 2056 } 2057 } else { 2058 printf("No connection.\n"); 2059 } 2060 # if !defined(TN3270) 2061 printf("Escape character is '%s'.\n", control(escape)); 2062 (void) fflush(stdout); 2063 # else /* !defined(TN3270) */ 2064 if ((!In3270) && ((argc < 2) || strcmp(argv[1], "notmuch"))) { 2065 printf("Escape character is '%s'.\n", control(escape)); 2066 } 2067 # if defined(unix) 2068 if ((argc >= 2) && !strcmp(argv[1], "everything")) { 2069 printf("SIGIO received %d time%s.\n", 2070 sigiocount, (sigiocount == 1)? "":"s"); 2071 if (In3270) { 2072 printf("Process ID %d, process group %d.\n", 2073 getpid(), getpgrp(getpid())); 2074 printf("Terminal input:\n"); 2075 filestuff(tin); 2076 printf("Terminal output:\n"); 2077 filestuff(tout); 2078 printf("Network socket:\n"); 2079 filestuff(net); 2080 } 2081 } 2082 if (In3270 && transcom) { 2083 printf("Transparent mode command is '%s'.\n", transcom); 2084 } 2085 # endif /* defined(unix) */ 2086 (void) fflush(stdout); 2087 if (In3270) { 2088 return 0; 2089 } 2090 # endif /* defined(TN3270) */ 2091 return 1; 2092 } 2093 2094 #ifdef SIGINFO 2095 /* 2096 * Function that gets called when SIGINFO is received. 2097 */ 2098 ayt_status() 2099 { 2100 (void) call(status, "status", "notmuch", 0); 2101 } 2102 #endif 2103 2104 int 2105 tn(argc, argv) 2106 int argc; 2107 char *argv[]; 2108 { 2109 register struct hostent *host = 0; 2110 struct sockaddr_in sin; 2111 struct servent *sp = 0; 2112 unsigned long temp, inet_addr(); 2113 extern char *inet_ntoa(); 2114 #if defined(IP_OPTIONS) && defined(IPPROTO_IP) 2115 char *srp = 0, *strrchr(); 2116 unsigned long sourceroute(), srlen; 2117 #endif 2118 char *cmd, *hostp = 0, *portp = 0, *user = 0; 2119 2120 /* clear the socket address prior to use */ 2121 bzero((char *)&sin, sizeof(sin)); 2122 2123 if (connected) { 2124 printf("?Already connected to %s\n", hostname); 2125 setuid(getuid()); 2126 return 0; 2127 } 2128 if (argc < 2) { 2129 (void) strcpy(line, "open "); 2130 printf("(to) "); 2131 (void) fgets(&line[strlen(line)], sizeof(line) - strlen(line), stdin); 2132 makeargv(); 2133 argc = margc; 2134 argv = margv; 2135 } 2136 cmd = *argv; 2137 --argc; ++argv; 2138 while (argc) { 2139 if (isprefix(*argv, "help") || isprefix(*argv, "?")) 2140 goto usage; 2141 if (strcmp(*argv, "-l") == 0) { 2142 --argc; ++argv; 2143 if (argc == 0) 2144 goto usage; 2145 user = *argv++; 2146 --argc; 2147 continue; 2148 } 2149 if (strcmp(*argv, "-a") == 0) { 2150 --argc; ++argv; 2151 autologin = 1; 2152 continue; 2153 } 2154 if (hostp == 0) { 2155 hostp = *argv++; 2156 --argc; 2157 continue; 2158 } 2159 if (portp == 0) { 2160 portp = *argv++; 2161 --argc; 2162 continue; 2163 } 2164 usage: 2165 printf("usage: %s [-l user] [-a] host-name [port]\n", cmd); 2166 setuid(getuid()); 2167 return 0; 2168 } 2169 if (hostp == 0) 2170 goto usage; 2171 2172 #if defined(IP_OPTIONS) && defined(IPPROTO_IP) 2173 if (hostp[0] == '@' || hostp[0] == '!') { 2174 if ((hostname = strrchr(hostp, ':')) == NULL) 2175 hostname = strrchr(hostp, '@'); 2176 hostname++; 2177 srp = 0; 2178 temp = sourceroute(hostp, &srp, &srlen); 2179 if (temp == 0) { 2180 herror(srp); 2181 setuid(getuid()); 2182 return 0; 2183 } else if (temp == -1) { 2184 printf("Bad source route option: %s\n", hostp); 2185 setuid(getuid()); 2186 return 0; 2187 } else { 2188 sin.sin_addr.s_addr = temp; 2189 sin.sin_family = AF_INET; 2190 } 2191 } else { 2192 #endif 2193 temp = inet_addr(hostp); 2194 if (temp != (unsigned long) -1) { 2195 sin.sin_addr.s_addr = temp; 2196 sin.sin_family = AF_INET; 2197 (void) strcpy(_hostname, hostp); 2198 hostname = _hostname; 2199 } else { 2200 host = gethostbyname(hostp); 2201 if (host) { 2202 sin.sin_family = host->h_addrtype; 2203 #if defined(h_addr) /* In 4.3, this is a #define */ 2204 memcpy((caddr_t)&sin.sin_addr, 2205 host->h_addr_list[0], host->h_length); 2206 #else /* defined(h_addr) */ 2207 memcpy((caddr_t)&sin.sin_addr, host->h_addr, host->h_length); 2208 #endif /* defined(h_addr) */ 2209 strncpy(_hostname, host->h_name, sizeof(_hostname)); 2210 _hostname[sizeof(_hostname)-1] = '\0'; 2211 hostname = _hostname; 2212 } else { 2213 herror(hostp); 2214 setuid(getuid()); 2215 return 0; 2216 } 2217 } 2218 #if defined(IP_OPTIONS) && defined(IPPROTO_IP) 2219 } 2220 #endif 2221 if (portp) { 2222 if (*portp == '-') { 2223 portp++; 2224 telnetport = 1; 2225 } else 2226 telnetport = 0; 2227 sin.sin_port = atoi(portp); 2228 if (sin.sin_port == 0) { 2229 sp = getservbyname(portp, "tcp"); 2230 if (sp) 2231 sin.sin_port = sp->s_port; 2232 else { 2233 printf("%s: bad port number\n", portp); 2234 setuid(getuid()); 2235 return 0; 2236 } 2237 } else { 2238 sin.sin_port = htons(sin.sin_port); 2239 } 2240 } else { 2241 if (sp == 0) { 2242 sp = getservbyname("telnet", "tcp"); 2243 if (sp == 0) { 2244 fprintf(stderr, "telnet: tcp/telnet: unknown service\n"); 2245 setuid(getuid()); 2246 return 0; 2247 } 2248 sin.sin_port = sp->s_port; 2249 } 2250 telnetport = 1; 2251 } 2252 printf("Trying %s...\n", inet_ntoa(sin.sin_addr)); 2253 do { 2254 net = socket(AF_INET, SOCK_STREAM, 0); 2255 setuid(getuid()); 2256 if (net < 0) { 2257 perror("telnet: socket"); 2258 return 0; 2259 } 2260 #if defined(IP_OPTIONS) && defined(IPPROTO_IP) 2261 if (srp && setsockopt(net, IPPROTO_IP, IP_OPTIONS, (char *)srp, srlen) < 0) 2262 perror("setsockopt (IP_OPTIONS)"); 2263 #endif 2264 #if defined(IPPROTO_IP) && defined(IP_TOS) 2265 { 2266 # if defined(HAS_GETTOS) 2267 struct tosent *tp; 2268 if (tos < 0 && (tp = gettosbyname("telnet", "tcp"))) 2269 tos = tp->t_tos; 2270 # endif 2271 if (tos < 0) 2272 tos = 020; /* Low Delay bit */ 2273 if (tos 2274 && (setsockopt(net, IPPROTO_IP, IP_TOS, &tos, sizeof(int)) < 0) 2275 && (errno != ENOPROTOOPT)) 2276 perror("telnet: setsockopt (IP_TOS) (ignored)"); 2277 } 2278 #endif /* defined(IPPROTO_IP) && defined(IP_TOS) */ 2279 2280 if (debug && SetSockOpt(net, SOL_SOCKET, SO_DEBUG, 1) < 0) { 2281 perror("setsockopt (SO_DEBUG)"); 2282 } 2283 2284 if (connect(net, (struct sockaddr *)&sin, sizeof (sin)) < 0) { 2285 #if defined(h_addr) /* In 4.3, this is a #define */ 2286 if (host && host->h_addr_list[1]) { 2287 int oerrno = errno; 2288 2289 fprintf(stderr, "telnet: connect to address %s: ", 2290 inet_ntoa(sin.sin_addr)); 2291 errno = oerrno; 2292 perror((char *)0); 2293 host->h_addr_list++; 2294 memcpy((caddr_t)&sin.sin_addr, 2295 host->h_addr_list[0], host->h_length); 2296 (void) NetClose(net); 2297 continue; 2298 } 2299 #endif /* defined(h_addr) */ 2300 perror("telnet: Unable to connect to remote host"); 2301 return 0; 2302 } 2303 connected++; 2304 #if defined(AUTHENTICATE) || defined(ENCRYPT) 2305 auth_encrypt_connect(connected); 2306 #endif 2307 } while (connected == 0); 2308 cmdrc(hostp, hostname); 2309 if (autologin && user == NULL) { 2310 struct passwd *pw; 2311 2312 user = getenv("USER"); 2313 if (user == NULL || 2314 (pw = getpwnam(user)) && pw->pw_uid != getuid()) { 2315 if (pw = getpwuid(getuid())) 2316 user = pw->pw_name; 2317 else 2318 user = NULL; 2319 } 2320 } 2321 if (user) { 2322 env_define((unsigned char *)"USER", (unsigned char *)user); 2323 env_export((unsigned char *)"USER"); 2324 } 2325 (void) call(status, "status", "notmuch", 0); 2326 if (setjmp(peerdied) == 0) 2327 telnet(user); 2328 (void) NetClose(net); 2329 ExitString("Connection closed by foreign host.\n",1); 2330 /*NOTREACHED*/ 2331 } 2332 2333 #define HELPINDENT (sizeof ("connect")) 2334 2335 static char 2336 openhelp[] = "connect to a site", 2337 closehelp[] = "close current connection", 2338 logouthelp[] = "forcibly logout remote user and close the connection", 2339 quithelp[] = "exit telnet", 2340 statushelp[] = "print status information", 2341 helphelp[] = "print help information", 2342 sendhelp[] = "transmit special characters ('send ?' for more)", 2343 sethelp[] = "set operating parameters ('set ?' for more)", 2344 unsethelp[] = "unset operating parameters ('unset ?' for more)", 2345 togglestring[] ="toggle operating parameters ('toggle ?' for more)", 2346 slchelp[] = "change state of special charaters ('slc ?' for more)", 2347 displayhelp[] = "display operating parameters", 2348 #if defined(TN3270) && defined(unix) 2349 transcomhelp[] = "specify Unix command for transparent mode pipe", 2350 #endif /* defined(TN3270) && defined(unix) */ 2351 #if defined(AUTHENTICATE) 2352 authhelp[] = "turn on (off) authentication ('auth ?' for more)", 2353 #endif 2354 #if defined(ENCRYPT) 2355 encrypthelp[] = "turn on (off) encryption ('encrypt ?' for more)", 2356 #endif 2357 #if defined(unix) 2358 zhelp[] = "suspend telnet", 2359 #endif /* defined(unix) */ 2360 shellhelp[] = "invoke a subshell", 2361 envhelp[] = "change environment variables ('environ ?' for more)", 2362 modestring[] = "try to enter line or character mode ('mode ?' for more)"; 2363 2364 static int help(); 2365 2366 static Command cmdtab[] = { 2367 { "close", closehelp, bye, 1 }, 2368 { "logout", logouthelp, logout, 1 }, 2369 { "display", displayhelp, display, 0 }, 2370 { "mode", modestring, modecmd, 0 }, 2371 { "open", openhelp, tn, 0 }, 2372 { "quit", quithelp, quit, 0 }, 2373 { "send", sendhelp, sendcmd, 0 }, 2374 { "set", sethelp, setcmd, 0 }, 2375 { "unset", unsethelp, unsetcmd, 0 }, 2376 { "status", statushelp, status, 0 }, 2377 { "toggle", togglestring, toggle, 0 }, 2378 { "slc", slchelp, slccmd, 0 }, 2379 #if defined(TN3270) && defined(unix) 2380 { "transcom", transcomhelp, settranscom, 0 }, 2381 #endif /* defined(TN3270) && defined(unix) */ 2382 #if defined(AUTHENTICATE) 2383 { "auth", authhelp, auth_cmd, 0 }, 2384 #endif 2385 #if defined(ENCRYPT) 2386 { "encrypt", encrypthelp, encrypt_cmd, 0 }, 2387 #endif 2388 #if defined(unix) 2389 { "z", zhelp, suspend, 0 }, 2390 #endif /* defined(unix) */ 2391 #if defined(TN3270) 2392 { "!", shellhelp, shell, 1 }, 2393 #else 2394 { "!", shellhelp, shell, 0 }, 2395 #endif 2396 { "environ", envhelp, env_cmd, 0 }, 2397 { "?", helphelp, help, 0 }, 2398 0 2399 }; 2400 2401 static char crmodhelp[] = "deprecated command -- use 'toggle crmod' instead"; 2402 static char escapehelp[] = "deprecated command -- use 'set escape' instead"; 2403 2404 static Command cmdtab2[] = { 2405 { "help", 0, help, 0 }, 2406 { "escape", escapehelp, setescape, 0 }, 2407 { "crmod", crmodhelp, togcrmod, 0 }, 2408 0 2409 }; 2410 2411 2412 /* 2413 * Call routine with argc, argv set from args (terminated by 0). 2414 */ 2415 2416 /*VARARGS1*/ 2417 static 2418 call(va_alist) 2419 va_dcl 2420 { 2421 va_list ap; 2422 typedef int (*intrtn_t)(); 2423 intrtn_t routine; 2424 char *args[100]; 2425 int argno = 0; 2426 2427 va_start(ap); 2428 routine = (va_arg(ap, intrtn_t)); 2429 while ((args[argno++] = va_arg(ap, char *)) != 0) { 2430 ; 2431 } 2432 va_end(ap); 2433 return (*routine)(argno-1, args); 2434 } 2435 2436 2437 static Command * 2438 getcmd(name) 2439 char *name; 2440 { 2441 Command *cm; 2442 2443 if (cm = (Command *) genget(name, (char **) cmdtab, sizeof(Command))) 2444 return cm; 2445 return (Command *) genget(name, (char **) cmdtab2, sizeof(Command)); 2446 } 2447 2448 void 2449 command(top, tbuf, cnt) 2450 int top; 2451 char *tbuf; 2452 int cnt; 2453 { 2454 register Command *c; 2455 2456 setcommandmode(); 2457 if (!top) { 2458 putchar('\n'); 2459 #if defined(unix) 2460 } else { 2461 (void) signal(SIGINT, SIG_DFL); 2462 (void) signal(SIGQUIT, SIG_DFL); 2463 #endif /* defined(unix) */ 2464 } 2465 for (;;) { 2466 if (rlogin == _POSIX_VDISABLE) 2467 printf("%s> ", prompt); 2468 if (tbuf) { 2469 register char *cp; 2470 cp = line; 2471 while (cnt > 0 && (*cp++ = *tbuf++) != '\n') 2472 cnt--; 2473 tbuf = 0; 2474 if (cp == line || *--cp != '\n' || cp == line) 2475 goto getline; 2476 *cp = '\0'; 2477 if (rlogin == _POSIX_VDISABLE) 2478 printf("%s\n", line); 2479 } else { 2480 getline: 2481 if (rlogin != _POSIX_VDISABLE) 2482 printf("%s> ", prompt); 2483 if (fgets(line, sizeof(line), stdin) == NULL) { 2484 if (feof(stdin) || ferror(stdin)) { 2485 (void) quit(); 2486 /*NOTREACHED*/ 2487 } 2488 break; 2489 } 2490 } 2491 if (line[0] == 0) 2492 break; 2493 makeargv(); 2494 if (margv[0] == 0) { 2495 break; 2496 } 2497 c = getcmd(margv[0]); 2498 if (Ambiguous(c)) { 2499 printf("?Ambiguous command\n"); 2500 continue; 2501 } 2502 if (c == 0) { 2503 printf("?Invalid command\n"); 2504 continue; 2505 } 2506 if (c->needconnect && !connected) { 2507 printf("?Need to be connected first.\n"); 2508 continue; 2509 } 2510 if ((*c->handler)(margc, margv)) { 2511 break; 2512 } 2513 } 2514 if (!top) { 2515 if (!connected) { 2516 longjmp(toplevel, 1); 2517 /*NOTREACHED*/ 2518 } 2519 #if defined(TN3270) 2520 if (shell_active == 0) { 2521 setconnmode(0); 2522 } 2523 #else /* defined(TN3270) */ 2524 setconnmode(0); 2525 #endif /* defined(TN3270) */ 2526 } 2527 } 2528 2529 /* 2530 * Help command. 2531 */ 2532 static 2533 help(argc, argv) 2534 int argc; 2535 char *argv[]; 2536 { 2537 register Command *c; 2538 2539 if (argc == 1) { 2540 printf("Commands may be abbreviated. Commands are:\n\n"); 2541 for (c = cmdtab; c->name; c++) 2542 if (c->help) { 2543 printf("%-*s\t%s\n", HELPINDENT, c->name, 2544 c->help); 2545 } 2546 return 0; 2547 } 2548 while (--argc > 0) { 2549 register char *arg; 2550 arg = *++argv; 2551 c = getcmd(arg); 2552 if (Ambiguous(c)) 2553 printf("?Ambiguous help command %s\n", arg); 2554 else if (c == (Command *)0) 2555 printf("?Invalid help command %s\n", arg); 2556 else 2557 printf("%s\n", c->help); 2558 } 2559 return 0; 2560 } 2561 2562 static char *rcname = 0; 2563 static char rcbuf[128]; 2564 2565 cmdrc(m1, m2) 2566 char *m1, *m2; 2567 { 2568 register Command *c; 2569 FILE *rcfile; 2570 int gotmachine = 0; 2571 int l1 = strlen(m1); 2572 int l2 = strlen(m2); 2573 char m1save[64]; 2574 2575 if (skiprc) 2576 return; 2577 2578 strcpy(m1save, m1); 2579 m1 = m1save; 2580 2581 if (rcname == 0) { 2582 rcname = getenv("HOME"); 2583 if (rcname) 2584 strcpy(rcbuf, rcname); 2585 else 2586 rcbuf[0] = '\0'; 2587 strcat(rcbuf, "/.telnetrc"); 2588 rcname = rcbuf; 2589 } 2590 2591 if ((rcfile = fopen(rcname, "r")) == 0) { 2592 return; 2593 } 2594 2595 for (;;) { 2596 if (fgets(line, sizeof(line), rcfile) == NULL) 2597 break; 2598 if (line[0] == 0) 2599 break; 2600 if (line[0] == '#') 2601 continue; 2602 if (gotmachine) { 2603 if (!isspace(line[0])) 2604 gotmachine = 0; 2605 } 2606 if (gotmachine == 0) { 2607 if (isspace(line[0])) 2608 continue; 2609 if (strncasecmp(line, m1, l1) == 0) 2610 strncpy(line, &line[l1], sizeof(line) - l1); 2611 else if (strncasecmp(line, m2, l2) == 0) 2612 strncpy(line, &line[l2], sizeof(line) - l2); 2613 else if (strncasecmp(line, "DEFAULT", 7) == 0) 2614 strncpy(line, &line[7], sizeof(line) - 7); 2615 else 2616 continue; 2617 if (line[0] != ' ' && line[0] != '\t' && line[0] != '\n') 2618 continue; 2619 gotmachine = 1; 2620 } 2621 makeargv(); 2622 if (margv[0] == 0) 2623 continue; 2624 c = getcmd(margv[0]); 2625 if (Ambiguous(c)) { 2626 printf("?Ambiguous command: %s\n", margv[0]); 2627 continue; 2628 } 2629 if (c == 0) { 2630 printf("?Invalid command: %s\n", margv[0]); 2631 continue; 2632 } 2633 /* 2634 * This should never happen... 2635 */ 2636 if (c->needconnect && !connected) { 2637 printf("?Need to be connected first for %s.\n", margv[0]); 2638 continue; 2639 } 2640 (*c->handler)(margc, margv); 2641 } 2642 fclose(rcfile); 2643 } 2644 2645 #if defined(IP_OPTIONS) && defined(IPPROTO_IP) 2646 2647 /* 2648 * Source route is handed in as 2649 * [!]@hop1@hop2...[@|:]dst 2650 * If the leading ! is present, it is a 2651 * strict source route, otherwise it is 2652 * assmed to be a loose source route. 2653 * 2654 * We fill in the source route option as 2655 * hop1,hop2,hop3...dest 2656 * and return a pointer to hop1, which will 2657 * be the address to connect() to. 2658 * 2659 * Arguments: 2660 * arg: pointer to route list to decipher 2661 * 2662 * cpp: If *cpp is not equal to NULL, this is a 2663 * pointer to a pointer to a character array 2664 * that should be filled in with the option. 2665 * 2666 * lenp: pointer to an integer that contains the 2667 * length of *cpp if *cpp != NULL. 2668 * 2669 * Return values: 2670 * 2671 * Returns the address of the host to connect to. If the 2672 * return value is -1, there was a syntax error in the 2673 * option, either unknown characters, or too many hosts. 2674 * If the return value is 0, one of the hostnames in the 2675 * path is unknown, and *cpp is set to point to the bad 2676 * hostname. 2677 * 2678 * *cpp: If *cpp was equal to NULL, it will be filled 2679 * in with a pointer to our static area that has 2680 * the option filled in. This will be 32bit aligned. 2681 * 2682 * *lenp: This will be filled in with how long the option 2683 * pointed to by *cpp is. 2684 * 2685 */ 2686 unsigned long 2687 sourceroute(arg, cpp, lenp) 2688 char *arg; 2689 char **cpp; 2690 int *lenp; 2691 { 2692 static char lsr[44]; 2693 char *cp, *cp2, *lsrp, *lsrep; 2694 register int tmp; 2695 struct in_addr sin_addr; 2696 register struct hostent *host = 0; 2697 register char c; 2698 2699 /* 2700 * Verify the arguments, and make sure we have 2701 * at least 7 bytes for the option. 2702 */ 2703 if (cpp == NULL || lenp == NULL) 2704 return((unsigned long)-1); 2705 if (*cpp != NULL && *lenp < 7) 2706 return((unsigned long)-1); 2707 /* 2708 * Decide whether we have a buffer passed to us, 2709 * or if we need to use our own static buffer. 2710 */ 2711 if (*cpp) { 2712 lsrp = *cpp; 2713 lsrep = lsrp + *lenp; 2714 } else { 2715 *cpp = lsrp = lsr; 2716 lsrep = lsrp + 44; 2717 } 2718 2719 cp = arg; 2720 2721 /* 2722 * Next, decide whether we have a loose source 2723 * route or a strict source route, and fill in 2724 * the begining of the option. 2725 */ 2726 if (*cp == '!') { 2727 cp++; 2728 *lsrp++ = IPOPT_SSRR; 2729 } else 2730 *lsrp++ = IPOPT_LSRR; 2731 2732 if (*cp != '@') 2733 return((unsigned long)-1); 2734 2735 lsrp++; /* skip over length, we'll fill it in later */ 2736 *lsrp++ = 4; 2737 2738 cp++; 2739 2740 sin_addr.s_addr = 0; 2741 2742 for (c = 0;;) { 2743 if (c == ':') 2744 cp2 = 0; 2745 else for (cp2 = cp; c = *cp2; cp2++) { 2746 if (c == ',') { 2747 *cp2++ = '\0'; 2748 if (*cp2 == '@') 2749 cp2++; 2750 } else if (c == '@') { 2751 *cp2++ = '\0'; 2752 } else if (c == ':') { 2753 *cp2++ = '\0'; 2754 } else 2755 continue; 2756 break; 2757 } 2758 if (!c) 2759 cp2 = 0; 2760 2761 if ((tmp = inet_addr(cp)) != -1) { 2762 sin_addr.s_addr = tmp; 2763 } else if (host = gethostbyname(cp)) { 2764 #if defined(h_addr) 2765 memcpy((caddr_t)&sin_addr, 2766 host->h_addr_list[0], host->h_length); 2767 #else 2768 memcpy((caddr_t)&sin_addr, host->h_addr, host->h_length); 2769 #endif 2770 } else { 2771 *cpp = cp; 2772 return(0); 2773 } 2774 memcpy(lsrp, (char *)&sin_addr, 4); 2775 lsrp += 4; 2776 if (cp2) 2777 cp = cp2; 2778 else 2779 break; 2780 /* 2781 * Check to make sure there is space for next address 2782 */ 2783 if (lsrp + 4 > lsrep) 2784 return((unsigned long)-1); 2785 } 2786 if ((*(*cpp+IPOPT_OLEN) = lsrp - *cpp) <= 7) { 2787 *cpp = 0; 2788 *lenp = 0; 2789 return((unsigned long)-1); 2790 } 2791 *lsrp++ = IPOPT_NOP; /* 32 bit word align it */ 2792 *lenp = lsrp - *cpp; 2793 return(sin_addr.s_addr); 2794 } 2795 #endif 2796