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 5.5 (Berkeley) 03/22/91"; 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 extern 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 what; /* what we are sending this time */ 269 int count; /* how many bytes we are going to need to send */ 270 int i; 271 int question = 0; /* was at least one argument a question */ 272 struct sendlist *s; /* pointer to current command */ 273 int success = 0; 274 int needconnect = 0; 275 276 if (argc < 2) { 277 printf("need at least one argument for 'send' command\n"); 278 printf("'send ?' for help\n"); 279 return 0; 280 } 281 /* 282 * First, validate all the send arguments. 283 * In addition, we see how much space we are going to need, and 284 * whether or not we will be doing a "SYNCH" operation (which 285 * flushes the network queue). 286 */ 287 count = 0; 288 for (i = 1; i < argc; i++) { 289 s = GETSEND(argv[i]); 290 if (s == 0) { 291 printf("Unknown send argument '%s'\n'send ?' for help.\n", 292 argv[i]); 293 return 0; 294 } else if (Ambiguous(s)) { 295 printf("Ambiguous send argument '%s'\n'send ?' for help.\n", 296 argv[i]); 297 return 0; 298 } 299 if (i + s->narg >= argc) { 300 fprintf(stderr, 301 "Need %d argument%s to 'send %s' command. 'send %s ?' for help.\n", 302 s->narg, s->narg == 1 ? "" : "s", s->name, s->name); 303 return 0; 304 } 305 count += s->nbyte; 306 if (s->handler == send_help) { 307 send_help(); 308 return 0; 309 } 310 311 i += s->narg; 312 needconnect += s->needconnect; 313 } 314 if (!connected && needconnect) { 315 printf("?Need to be connected first.\n"); 316 printf("'send ?' for help\n"); 317 return 0; 318 } 319 /* Now, do we have enough room? */ 320 if (NETROOM() < count) { 321 printf("There is not enough room in the buffer TO the network\n"); 322 printf("to process your request. Nothing will be done.\n"); 323 printf("('send synch' will throw away most data in the network\n"); 324 printf("buffer, if this might help.)\n"); 325 return 0; 326 } 327 /* OK, they are all OK, now go through again and actually send */ 328 count = 0; 329 for (i = 1; i < argc; i++) { 330 if ((s = GETSEND(argv[i])) == 0) { 331 fprintf(stderr, "Telnet 'send' error - argument disappeared!\n"); 332 (void) quit(); 333 /*NOTREACHED*/ 334 } 335 if (s->handler) { 336 count++; 337 success += (*s->handler)((s->narg > 0) ? argv[i+1] : 0, 338 (s->narg > 1) ? argv[i+2] : 0); 339 i += s->narg; 340 } else { 341 NET2ADD(IAC, what); 342 printoption("SENT", IAC, what); 343 } 344 } 345 return (count == success); 346 } 347 348 static int 349 send_esc() 350 { 351 NETADD(escape); 352 return 1; 353 } 354 355 static int 356 send_docmd(name) 357 char *name; 358 { 359 void send_do(); 360 return(send_tncmd(send_do, "do", name)); 361 } 362 363 static int 364 send_dontcmd(name) 365 char *name; 366 { 367 void send_dont(); 368 return(send_tncmd(send_dont, "dont", name)); 369 } 370 static int 371 send_willcmd(name) 372 char *name; 373 { 374 void send_will(); 375 return(send_tncmd(send_will, "will", name)); 376 } 377 static int 378 send_wontcmd(name) 379 char *name; 380 { 381 void send_wont(); 382 return(send_tncmd(send_wont, "wont", name)); 383 } 384 385 int 386 send_tncmd(func, cmd, name) 387 void (*func)(); 388 char *cmd, *name; 389 { 390 char **cpp; 391 extern char *telopts[]; 392 393 if (isprefix(name, "help") || isprefix(name, "?")) { 394 register int col, len; 395 396 printf("Usage: send %s <option>\n", cmd); 397 printf("Valid options are:\n\t"); 398 399 col = 8; 400 for (cpp = telopts; *cpp; cpp++) { 401 len = strlen(*cpp) + 1; 402 if (col + len > 65) { 403 printf("\n\t"); 404 col = 8; 405 } 406 printf(" %s", *cpp); 407 col += len; 408 } 409 printf("\n"); 410 return 0; 411 } 412 cpp = (char **)genget(name, telopts, sizeof(char *)); 413 if (Ambiguous(cpp)) { 414 fprintf(stderr,"'%s': ambiguous argument ('send %s ?' for help).\n", 415 name, cmd); 416 return 0; 417 } 418 if (cpp == 0) { 419 fprintf(stderr, "'%s': unknown argument ('send %s ?' for help).\n", 420 name, cmd); 421 return 0; 422 } 423 if (!connected) { 424 printf("?Need to be connected first.\n"); 425 return 0; 426 } 427 (*func)(cpp - telopts, 1); 428 return 1; 429 } 430 431 static int 432 send_help() 433 { 434 struct sendlist *s; /* pointer to current command */ 435 for (s = Sendlist; s->name; s++) { 436 if (s->help) 437 printf("%-15s %s\n", s->name, s->help); 438 } 439 return(0); 440 } 441 442 /* 443 * The following are the routines and data structures referred 444 * to by the arguments to the "toggle" command. 445 */ 446 447 static int 448 lclchars() 449 { 450 donelclchars = 1; 451 return 1; 452 } 453 454 static int 455 togdebug() 456 { 457 #ifndef NOT43 458 if (net > 0 && 459 (SetSockOpt(net, SOL_SOCKET, SO_DEBUG, debug)) < 0) { 460 perror("setsockopt (SO_DEBUG)"); 461 } 462 #else /* NOT43 */ 463 if (debug) { 464 if (net > 0 && SetSockOpt(net, SOL_SOCKET, SO_DEBUG, 0, 0) < 0) 465 perror("setsockopt (SO_DEBUG)"); 466 } else 467 printf("Cannot turn off socket debugging\n"); 468 #endif /* NOT43 */ 469 return 1; 470 } 471 472 473 static int 474 togcrlf() 475 { 476 if (crlf) { 477 printf("Will send carriage returns as telnet <CR><LF>.\n"); 478 } else { 479 printf("Will send carriage returns as telnet <CR><NUL>.\n"); 480 } 481 return 1; 482 } 483 484 int binmode; 485 486 static int 487 togbinary(val) 488 int val; 489 { 490 donebinarytoggle = 1; 491 492 if (val >= 0) { 493 binmode = val; 494 } else { 495 if (my_want_state_is_will(TELOPT_BINARY) && 496 my_want_state_is_do(TELOPT_BINARY)) { 497 binmode = 1; 498 } else if (my_want_state_is_wont(TELOPT_BINARY) && 499 my_want_state_is_dont(TELOPT_BINARY)) { 500 binmode = 0; 501 } 502 val = binmode ? 0 : 1; 503 } 504 505 if (val == 1) { 506 if (my_want_state_is_will(TELOPT_BINARY) && 507 my_want_state_is_do(TELOPT_BINARY)) { 508 printf("Already operating in binary mode with remote host.\n"); 509 } else { 510 printf("Negotiating binary mode with remote host.\n"); 511 tel_enter_binary(3); 512 } 513 } else { 514 if (my_want_state_is_wont(TELOPT_BINARY) && 515 my_want_state_is_dont(TELOPT_BINARY)) { 516 printf("Already in network ascii mode with remote host.\n"); 517 } else { 518 printf("Negotiating network ascii mode with remote host.\n"); 519 tel_leave_binary(3); 520 } 521 } 522 return 1; 523 } 524 525 static int 526 togrbinary(val) 527 int val; 528 { 529 donebinarytoggle = 1; 530 531 if (val == -1) 532 val = my_want_state_is_do(TELOPT_BINARY) ? 0 : 1; 533 534 if (val == 1) { 535 if (my_want_state_is_do(TELOPT_BINARY)) { 536 printf("Already receiving in binary mode.\n"); 537 } else { 538 printf("Negotiating binary mode on input.\n"); 539 tel_enter_binary(1); 540 } 541 } else { 542 if (my_want_state_is_dont(TELOPT_BINARY)) { 543 printf("Already receiving in network ascii mode.\n"); 544 } else { 545 printf("Negotiating network ascii mode on input.\n"); 546 tel_leave_binary(1); 547 } 548 } 549 return 1; 550 } 551 552 static int 553 togxbinary(val) 554 int val; 555 { 556 donebinarytoggle = 1; 557 558 if (val == -1) 559 val = my_want_state_is_will(TELOPT_BINARY) ? 0 : 1; 560 561 if (val == 1) { 562 if (my_want_state_is_will(TELOPT_BINARY)) { 563 printf("Already transmitting in binary mode.\n"); 564 } else { 565 printf("Negotiating binary mode on output.\n"); 566 tel_enter_binary(2); 567 } 568 } else { 569 if (my_want_state_is_wont(TELOPT_BINARY)) { 570 printf("Already transmitting in network ascii mode.\n"); 571 } else { 572 printf("Negotiating network ascii mode on output.\n"); 573 tel_leave_binary(2); 574 } 575 } 576 return 1; 577 } 578 579 580 extern int togglehelp P((void)); 581 #if defined(AUTHENTICATE) 582 extern int auth_togdebug P((int)); 583 #endif 584 #if defined(ENCRYPT) 585 extern int EncryptAutoEnc P((int)); 586 extern int EncryptAutoDec P((int)); 587 extern int EncryptDebug P((int)); 588 extern int EncryptVerbose P((int)); 589 #endif 590 591 struct togglelist { 592 char *name; /* name of toggle */ 593 char *help; /* help message */ 594 int (*handler)(); /* routine to do actual setting */ 595 int *variable; 596 char *actionexplanation; 597 }; 598 599 static struct togglelist Togglelist[] = { 600 { "autoflush", 601 "flushing of output when sending interrupt characters", 602 0, 603 &autoflush, 604 "flush output when sending interrupt characters" }, 605 { "autosynch", 606 "automatic sending of interrupt characters in urgent mode", 607 0, 608 &autosynch, 609 "send interrupt characters in urgent mode" }, 610 #if defined(AUTHENTICATE) 611 { "autologin", 612 "automatic sending of login and/or authentication info", 613 0, 614 &autologin, 615 "send login name and/or authentication information" }, 616 { "authdebug", 617 "Toggle authentication debugging", 618 auth_togdebug, 619 0, 620 "print authentication debugging information" }, 621 #endif 622 #if defined(ENCRYPT) 623 { "autoencrypt", 624 "automatic encryption of data stream", 625 EncryptAutoEnc, 626 0, 627 "automatically encrypt output" }, 628 { "autodecrypt", 629 "automatic decryption of data stream", 630 EncryptAutoDec, 631 0, 632 "automatically decrypt input" }, 633 { "verbose_encrypt", 634 "Toggle verbose encryption output", 635 EncryptVerbose, 636 0, 637 "print verbose encryption output" }, 638 { "encdebug", 639 "Toggle encryption debugging", 640 EncryptDebug, 641 0, 642 "print encryption debugging information" }, 643 #endif 644 { "skiprc", 645 "don't read ~/.telnetrc file", 646 0, 647 &skiprc, 648 "read ~/.telnetrc file" }, 649 { "binary", 650 "sending and receiving of binary data", 651 togbinary, 652 0, 653 0 }, 654 { "inbinary", 655 "receiving of binary data", 656 togrbinary, 657 0, 658 0 }, 659 { "outbinary", 660 "sending of binary data", 661 togxbinary, 662 0, 663 0 }, 664 { "crlf", 665 "sending carriage returns as telnet <CR><LF>", 666 togcrlf, 667 &crlf, 668 0 }, 669 { "crmod", 670 "mapping of received carriage returns", 671 0, 672 &crmod, 673 "map carriage return on output" }, 674 { "localchars", 675 "local recognition of certain control characters", 676 lclchars, 677 &localchars, 678 "recognize certain control characters" }, 679 { " ", "", 0 }, /* empty line */ 680 #if defined(unix) && defined(TN3270) 681 { "apitrace", 682 "(debugging) toggle tracing of API transactions", 683 0, 684 &apitrace, 685 "trace API transactions" }, 686 { "cursesdata", 687 "(debugging) toggle printing of hexadecimal curses data", 688 0, 689 &cursesdata, 690 "print hexadecimal representation of curses data" }, 691 #endif /* defined(unix) && defined(TN3270) */ 692 { "debug", 693 "debugging", 694 togdebug, 695 &debug, 696 "turn on socket level debugging" }, 697 { "netdata", 698 "printing of hexadecimal network data (debugging)", 699 0, 700 &netdata, 701 "print hexadecimal representation of network traffic" }, 702 { "prettydump", 703 "output of \"netdata\" to user readable format (debugging)", 704 0, 705 &prettydump, 706 "print user readable output for \"netdata\"" }, 707 { "options", 708 "viewing of options processing (debugging)", 709 0, 710 &showoptions, 711 "show option processing" }, 712 #if defined(unix) 713 { "termdata", 714 "(debugging) toggle printing of hexadecimal terminal data", 715 0, 716 &termdata, 717 "print hexadecimal representation of terminal traffic" }, 718 #endif /* defined(unix) */ 719 { "?", 720 0, 721 togglehelp }, 722 { "help", 723 0, 724 togglehelp }, 725 { 0 } 726 }; 727 728 static int 729 togglehelp() 730 { 731 struct togglelist *c; 732 733 for (c = Togglelist; c->name; c++) { 734 if (c->help) { 735 if (*c->help) 736 printf("%-15s toggle %s\n", c->name, c->help); 737 else 738 printf("\n"); 739 } 740 } 741 printf("\n"); 742 printf("%-15s %s\n", "?", "display help information"); 743 return 0; 744 } 745 746 static void 747 settogglehelp(set) 748 int set; 749 { 750 struct togglelist *c; 751 752 for (c = Togglelist; c->name; c++) { 753 if (c->help) { 754 if (*c->help) 755 printf("%-15s %s %s\n", c->name, set ? "enable" : "disable", 756 c->help); 757 else 758 printf("\n"); 759 } 760 } 761 } 762 763 #define GETTOGGLE(name) (struct togglelist *) \ 764 genget(name, (char **) Togglelist, sizeof(struct togglelist)) 765 766 static int 767 toggle(argc, argv) 768 int argc; 769 char *argv[]; 770 { 771 int retval = 1; 772 char *name; 773 struct togglelist *c; 774 775 if (argc < 2) { 776 fprintf(stderr, 777 "Need an argument to 'toggle' command. 'toggle ?' for help.\n"); 778 return 0; 779 } 780 argc--; 781 argv++; 782 while (argc--) { 783 name = *argv++; 784 c = GETTOGGLE(name); 785 if (Ambiguous(c)) { 786 fprintf(stderr, "'%s': ambiguous argument ('toggle ?' for help).\n", 787 name); 788 return 0; 789 } else if (c == 0) { 790 fprintf(stderr, "'%s': unknown argument ('toggle ?' for help).\n", 791 name); 792 return 0; 793 } else { 794 if (c->variable) { 795 *c->variable = !*c->variable; /* invert it */ 796 if (c->actionexplanation) { 797 printf("%s %s.\n", *c->variable? "Will" : "Won't", 798 c->actionexplanation); 799 } 800 } 801 if (c->handler) { 802 retval &= (*c->handler)(-1); 803 } 804 } 805 } 806 return retval; 807 } 808 809 /* 810 * The following perform the "set" command. 811 */ 812 813 #ifdef USE_TERMIO 814 struct termio new_tc = { 0 }; 815 #endif 816 817 struct setlist { 818 char *name; /* name */ 819 char *help; /* help information */ 820 void (*handler)(); 821 cc_t *charp; /* where it is located at */ 822 }; 823 824 static struct setlist Setlist[] = { 825 #ifdef KLUDGELINEMODE 826 { "echo", "character to toggle local echoing on/off", 0, &echoc }, 827 #endif 828 { "escape", "character to escape back to telnet command mode", 0, &escape }, 829 { "rlogin", "rlogin escape character", 0, &rlogin }, 830 { "tracefile", "file to write trace information to", SetNetTrace, (cc_t *)NetTraceFile}, 831 { " ", "" }, 832 { " ", "The following need 'localchars' to be toggled true", 0, 0 }, 833 { "flushoutput", "character to cause an Abort Output", 0, termFlushCharp }, 834 { "interrupt", "character to cause an Interrupt Process", 0, termIntCharp }, 835 { "quit", "character to cause an Abort process", 0, termQuitCharp }, 836 { "eof", "character to cause an EOF ", 0, termEofCharp }, 837 { " ", "" }, 838 { " ", "The following are for local editing in linemode", 0, 0 }, 839 { "erase", "character to use to erase a character", 0, termEraseCharp }, 840 { "kill", "character to use to erase a line", 0, termKillCharp }, 841 { "lnext", "character to use for literal next", 0, termLiteralNextCharp }, 842 { "susp", "character to cause a Suspend Process", 0, termSuspCharp }, 843 { "reprint", "character to use for line reprint", 0, termRprntCharp }, 844 { "worderase", "character to use to erase a word", 0, termWerasCharp }, 845 { "start", "character to use for XON", 0, termStartCharp }, 846 { "stop", "character to use for XOFF", 0, termStopCharp }, 847 { "forw1", "alternate end of line character", 0, termForw1Charp }, 848 { "forw2", "alternate end of line character", 0, termForw2Charp }, 849 { "ayt", "alternate AYT character", 0, termAytCharp }, 850 { 0 } 851 }; 852 853 #if defined(CRAY) && !defined(__STDC__) 854 /* Work around compiler bug in pcc 4.1.5 */ 855 void 856 _setlist_init() 857 { 858 #ifndef KLUDGELINEMODE 859 #define N 5 860 #else 861 #define N 6 862 #endif 863 Setlist[N+0].charp = &termFlushChar; 864 Setlist[N+1].charp = &termIntChar; 865 Setlist[N+2].charp = &termQuitChar; 866 Setlist[N+3].charp = &termEofChar; 867 Setlist[N+6].charp = &termEraseChar; 868 Setlist[N+7].charp = &termKillChar; 869 Setlist[N+8].charp = &termLiteralNextChar; 870 Setlist[N+9].charp = &termSuspChar; 871 Setlist[N+10].charp = &termRprntChar; 872 Setlist[N+11].charp = &termWerasChar; 873 Setlist[N+12].charp = &termStartChar; 874 Setlist[N+13].charp = &termStopChar; 875 Setlist[N+14].charp = &termForw1Char; 876 Setlist[N+15].charp = &termForw2Char; 877 Setlist[N+16].charp = &termAytChar; 878 #undef N 879 } 880 #endif /* defined(CRAY) && !defined(__STDC__) */ 881 882 static struct setlist * 883 getset(name) 884 char *name; 885 { 886 return (struct setlist *) 887 genget(name, (char **) Setlist, sizeof(struct setlist)); 888 } 889 890 void 891 set_escape_char(s) 892 char *s; 893 { 894 if (rlogin != _POSIX_VDISABLE) { 895 rlogin = (s && *s) ? special(s) : _POSIX_VDISABLE; 896 printf("Telnet rlogin escape character is '%s'.\n", 897 control(rlogin)); 898 } else { 899 escape = (s && *s) ? special(s) : _POSIX_VDISABLE; 900 printf("Telnet escape character is '%s'.\n", control(escape)); 901 } 902 } 903 904 static int 905 setcmd(argc, argv) 906 int argc; 907 char *argv[]; 908 { 909 int value; 910 struct setlist *ct; 911 struct togglelist *c; 912 913 if (argc < 2 || argc > 3) { 914 printf("Format is 'set Name Value'\n'set ?' for help.\n"); 915 return 0; 916 } 917 if ((argc == 2) && (isprefix(argv[1], "?") || isprefix(argv[1], "help"))) { 918 for (ct = Setlist; ct->name; ct++) 919 printf("%-15s %s\n", ct->name, ct->help); 920 printf("\n"); 921 settogglehelp(1); 922 printf("%-15s %s\n", "?", "display help information"); 923 return 0; 924 } 925 926 ct = getset(argv[1]); 927 if (ct == 0) { 928 c = GETTOGGLE(argv[1]); 929 if (c == 0) { 930 fprintf(stderr, "'%s': unknown argument ('set ?' for help).\n", 931 argv[1]); 932 return 0; 933 } else if (Ambiguous(c)) { 934 fprintf(stderr, "'%s': ambiguous argument ('set ?' for help).\n", 935 argv[1]); 936 return 0; 937 } 938 if (c->variable) { 939 if ((argc == 2) || (strcmp("on", argv[2]) == 0)) 940 *c->variable = 1; 941 else if (strcmp("off", argv[2]) == 0) 942 *c->variable = 0; 943 else { 944 printf("Format is 'set togglename [on|off]'\n'set ?' for help.\n"); 945 return 0; 946 } 947 if (c->actionexplanation) { 948 printf("%s %s.\n", *c->variable? "Will" : "Won't", 949 c->actionexplanation); 950 } 951 } 952 if (c->handler) 953 (*c->handler)(1); 954 } else if (argc != 3) { 955 printf("Format is 'set Name Value'\n'set ?' for help.\n"); 956 return 0; 957 } else if (Ambiguous(ct)) { 958 fprintf(stderr, "'%s': ambiguous argument ('set ?' for help).\n", 959 argv[1]); 960 return 0; 961 } else if (ct->handler) { 962 (*ct->handler)(argv[2]); 963 printf("%s set to \"%s\".\n", ct->name, (char *)ct->charp); 964 } else { 965 if (strcmp("off", argv[2])) { 966 value = special(argv[2]); 967 } else { 968 value = _POSIX_VDISABLE; 969 } 970 *(ct->charp) = (cc_t)value; 971 printf("%s character is '%s'.\n", ct->name, control(*(ct->charp))); 972 } 973 slc_check(); 974 return 1; 975 } 976 977 static int 978 unsetcmd(argc, argv) 979 int argc; 980 char *argv[]; 981 { 982 struct setlist *ct; 983 struct togglelist *c; 984 register char *name; 985 986 if (argc < 2) { 987 fprintf(stderr, 988 "Need an argument to 'unset' command. 'unset ?' for help.\n"); 989 return 0; 990 } 991 if (isprefix(argv[1], "?") || isprefix(argv[1], "help")) { 992 for (ct = Setlist; ct->name; ct++) 993 printf("%-15s %s\n", ct->name, ct->help); 994 printf("\n"); 995 settogglehelp(0); 996 printf("%-15s %s\n", "?", "display help information"); 997 return 0; 998 } 999 1000 argc--; 1001 argv++; 1002 while (argc--) { 1003 name = *argv++; 1004 ct = getset(name); 1005 if (ct == 0) { 1006 c = GETTOGGLE(name); 1007 if (c == 0) { 1008 fprintf(stderr, "'%s': unknown argument ('unset ?' for help).\n", 1009 name); 1010 return 0; 1011 } else if (Ambiguous(c)) { 1012 fprintf(stderr, "'%s': ambiguous argument ('unset ?' for help).\n", 1013 name); 1014 return 0; 1015 } 1016 if (c->variable) { 1017 *c->variable = 0; 1018 if (c->actionexplanation) { 1019 printf("%s %s.\n", *c->variable? "Will" : "Won't", 1020 c->actionexplanation); 1021 } 1022 } 1023 if (c->handler) 1024 (*c->handler)(0); 1025 } else if (Ambiguous(ct)) { 1026 fprintf(stderr, "'%s': ambiguous argument ('unset ?' for help).\n", 1027 name); 1028 return 0; 1029 } else if (ct->handler) { 1030 (*ct->handler)(0); 1031 printf("%s reset to \"%s\".\n", ct->name, (char *)ct->charp); 1032 } else { 1033 *(ct->charp) = _POSIX_VDISABLE; 1034 printf("%s character is '%s'.\n", ct->name, control(*(ct->charp))); 1035 } 1036 } 1037 return 1; 1038 } 1039 1040 /* 1041 * The following are the data structures and routines for the 1042 * 'mode' command. 1043 */ 1044 #ifdef KLUDGELINEMODE 1045 extern int kludgelinemode; 1046 1047 static int 1048 dokludgemode() 1049 { 1050 kludgelinemode = 1; 1051 send_wont(TELOPT_LINEMODE, 1); 1052 send_dont(TELOPT_SGA, 1); 1053 send_dont(TELOPT_ECHO, 1); 1054 } 1055 #endif 1056 1057 static int 1058 dolinemode() 1059 { 1060 #ifdef KLUDGELINEMODE 1061 if (kludgelinemode) 1062 send_dont(TELOPT_SGA, 1); 1063 #endif 1064 send_will(TELOPT_LINEMODE, 1); 1065 send_dont(TELOPT_ECHO, 1); 1066 return 1; 1067 } 1068 1069 static int 1070 docharmode() 1071 { 1072 #ifdef KLUDGELINEMODE 1073 if (kludgelinemode) 1074 send_do(TELOPT_SGA, 1); 1075 else 1076 #endif 1077 send_wont(TELOPT_LINEMODE, 1); 1078 send_do(TELOPT_ECHO, 1); 1079 return 1; 1080 } 1081 1082 static int 1083 dolmmode(bit, on) 1084 int bit, on; 1085 { 1086 unsigned char c; 1087 extern int linemode; 1088 1089 if (my_want_state_is_wont(TELOPT_LINEMODE)) { 1090 printf("?Need to have LINEMODE option enabled first.\n"); 1091 printf("'mode ?' for help.\n"); 1092 return 0; 1093 } 1094 1095 if (on) 1096 c = (linemode | bit); 1097 else 1098 c = (linemode & ~bit); 1099 lm_mode(&c, 1, 1); 1100 return 1; 1101 } 1102 1103 int 1104 setmode(bit) 1105 { 1106 return dolmmode(bit, 1); 1107 } 1108 1109 int 1110 clearmode(bit) 1111 { 1112 return dolmmode(bit, 0); 1113 } 1114 1115 struct modelist { 1116 char *name; /* command name */ 1117 char *help; /* help string */ 1118 int (*handler)(); /* routine which executes command */ 1119 int needconnect; /* Do we need to be connected to execute? */ 1120 int arg1; 1121 }; 1122 1123 extern int modehelp(); 1124 1125 static struct modelist ModeList[] = { 1126 { "character", "Disable LINEMODE option", docharmode, 1 }, 1127 #ifdef KLUDGELINEMODE 1128 { "", "(or disable obsolete line-by-line mode)", 0 }, 1129 #endif 1130 { "line", "Enable LINEMODE option", dolinemode, 1 }, 1131 #ifdef KLUDGELINEMODE 1132 { "", "(or enable obsolete line-by-line mode)", 0 }, 1133 #endif 1134 { "", "", 0 }, 1135 { "", "These require the LINEMODE option to be enabled", 0 }, 1136 { "isig", "Enable signal trapping", setmode, 1, MODE_TRAPSIG }, 1137 { "+isig", 0, setmode, 1, MODE_TRAPSIG }, 1138 { "-isig", "Disable signal trapping", clearmode, 1, MODE_TRAPSIG }, 1139 { "edit", "Enable character editing", setmode, 1, MODE_EDIT }, 1140 { "+edit", 0, setmode, 1, MODE_EDIT }, 1141 { "-edit", "Disable character editing", clearmode, 1, MODE_EDIT }, 1142 { "softtabs", "Enable tab expansion", setmode, 1, MODE_SOFT_TAB }, 1143 { "+softtabs", 0, setmode, 1, MODE_SOFT_TAB }, 1144 { "-softtabs", "Disable character editing", clearmode, 1, MODE_SOFT_TAB }, 1145 { "litecho", "Enable literal character echo", setmode, 1, MODE_LIT_ECHO }, 1146 { "+litecho", 0, setmode, 1, MODE_LIT_ECHO }, 1147 { "-litecho", "Disable literal character echo", clearmode, 1, MODE_LIT_ECHO }, 1148 { "help", 0, modehelp, 0 }, 1149 #ifdef KLUDGELINEMODE 1150 { "kludgeline", 0, dokludgemode, 1 }, 1151 #endif 1152 { "", "", 0 }, 1153 { "?", "Print help information", modehelp, 0 }, 1154 { 0 }, 1155 }; 1156 1157 1158 int 1159 modehelp() 1160 { 1161 struct modelist *mt; 1162 1163 printf("format is: 'mode Mode', where 'Mode' is one of:\n\n"); 1164 for (mt = ModeList; mt->name; mt++) { 1165 if (mt->help) { 1166 if (*mt->help) 1167 printf("%-15s %s\n", mt->name, mt->help); 1168 else 1169 printf("\n"); 1170 } 1171 } 1172 return 0; 1173 } 1174 1175 #define GETMODECMD(name) (struct modelist *) \ 1176 genget(name, (char **) ModeList, sizeof(struct modelist)) 1177 1178 static int 1179 modecmd(argc, argv) 1180 int argc; 1181 char *argv[]; 1182 { 1183 struct modelist *mt; 1184 1185 if (argc != 2) { 1186 printf("'mode' command requires an argument\n"); 1187 printf("'mode ?' for help.\n"); 1188 } else if ((mt = GETMODECMD(argv[1])) == 0) { 1189 fprintf(stderr, "Unknown mode '%s' ('mode ?' for help).\n", argv[1]); 1190 } else if (Ambiguous(mt)) { 1191 fprintf(stderr, "Ambiguous mode '%s' ('mode ?' for help).\n", argv[1]); 1192 } else if (mt->needconnect && !connected) { 1193 printf("?Need to be connected first.\n"); 1194 printf("'mode ?' for help.\n"); 1195 } else if (mt->handler) { 1196 return (*mt->handler)(mt->arg1); 1197 } 1198 return 0; 1199 } 1200 1201 /* 1202 * The following data structures and routines implement the 1203 * "display" command. 1204 */ 1205 1206 static int 1207 display(argc, argv) 1208 int argc; 1209 char *argv[]; 1210 { 1211 struct togglelist *tl; 1212 struct setlist *sl; 1213 1214 #define dotog(tl) if (tl->variable && tl->actionexplanation) { \ 1215 if (*tl->variable) { \ 1216 printf("will"); \ 1217 } else { \ 1218 printf("won't"); \ 1219 } \ 1220 printf(" %s.\n", tl->actionexplanation); \ 1221 } 1222 1223 #define doset(sl) if (sl->name && *sl->name != ' ') { \ 1224 if (sl->handler == 0) \ 1225 printf("%-15s [%s]\n", sl->name, control(*sl->charp)); \ 1226 else \ 1227 printf("%-15s \"%s\"\n", sl->name, (char *)sl->charp); \ 1228 } 1229 1230 if (argc == 1) { 1231 for (tl = Togglelist; tl->name; tl++) { 1232 dotog(tl); 1233 } 1234 printf("\n"); 1235 for (sl = Setlist; sl->name; sl++) { 1236 doset(sl); 1237 } 1238 } else { 1239 int i; 1240 1241 for (i = 1; i < argc; i++) { 1242 sl = getset(argv[i]); 1243 tl = GETTOGGLE(argv[i]); 1244 if (Ambiguous(sl) || Ambiguous(tl)) { 1245 printf("?Ambiguous argument '%s'.\n", argv[i]); 1246 return 0; 1247 } else if (!sl && !tl) { 1248 printf("?Unknown argument '%s'.\n", argv[i]); 1249 return 0; 1250 } else { 1251 if (tl) { 1252 dotog(tl); 1253 } 1254 if (sl) { 1255 doset(sl); 1256 } 1257 } 1258 } 1259 } 1260 /*@*/optionstatus(); 1261 #if defined(ENCRYPT) 1262 EncryptStatus(); 1263 #endif 1264 return 1; 1265 #undef doset 1266 #undef dotog 1267 } 1268 1269 /* 1270 * The following are the data structures, and many of the routines, 1271 * relating to command processing. 1272 */ 1273 1274 /* 1275 * Set the escape character. 1276 */ 1277 static int 1278 setescape(argc, argv) 1279 int argc; 1280 char *argv[]; 1281 { 1282 register char *arg; 1283 char buf[50]; 1284 1285 printf( 1286 "Deprecated usage - please use 'set escape%s%s' in the future.\n", 1287 (argc > 2)? " ":"", (argc > 2)? argv[1]: ""); 1288 if (argc > 2) 1289 arg = argv[1]; 1290 else { 1291 printf("new escape character: "); 1292 (void) fgets(buf, sizeof(buf), stdin); 1293 arg = buf; 1294 } 1295 if (arg[0] != '\0') 1296 escape = arg[0]; 1297 if (!In3270) { 1298 printf("Escape character is '%s'.\n", control(escape)); 1299 } 1300 (void) fflush(stdout); 1301 return 1; 1302 } 1303 1304 /*VARARGS*/ 1305 static int 1306 togcrmod() 1307 { 1308 crmod = !crmod; 1309 printf("Deprecated usage - please use 'toggle crmod' in the future.\n"); 1310 printf("%s map carriage return on output.\n", crmod ? "Will" : "Won't"); 1311 (void) fflush(stdout); 1312 return 1; 1313 } 1314 1315 /*VARARGS*/ 1316 int 1317 suspend() 1318 { 1319 #ifdef SIGTSTP 1320 setcommandmode(); 1321 { 1322 long oldrows, oldcols, newrows, newcols, err; 1323 1324 err = TerminalWindowSize(&oldrows, &oldcols); 1325 (void) kill(0, SIGTSTP); 1326 err += TerminalWindowSize(&newrows, &newcols); 1327 if (connected && !err && 1328 ((oldrows != newrows) || (oldcols != newcols))) { 1329 sendnaws(); 1330 } 1331 } 1332 /* reget parameters in case they were changed */ 1333 TerminalSaveState(); 1334 setconnmode(0); 1335 #else 1336 printf("Suspend is not supported. Try the '!' command instead\n"); 1337 #endif 1338 return 1; 1339 } 1340 1341 #if !defined(TN3270) 1342 /*ARGSUSED*/ 1343 int 1344 shell(argc, argv) 1345 int argc; 1346 char *argv[]; 1347 { 1348 setcommandmode(); 1349 switch(vfork()) { 1350 case -1: 1351 perror("Fork failed\n"); 1352 break; 1353 1354 case 0: 1355 { 1356 /* 1357 * Fire up the shell in the child. 1358 */ 1359 register char *shellp, *shellname; 1360 extern char *rindex(); 1361 1362 shellp = getenv("SHELL"); 1363 if (shellp == NULL) 1364 shellp = "/bin/sh"; 1365 if ((shellname = rindex(shellp, '/')) == 0) 1366 shellname = shellp; 1367 else 1368 shellname++; 1369 if (argc > 1) 1370 execl(shellp, shellname, "-c", &saveline[1], 0); 1371 else 1372 execl(shellp, shellname, 0); 1373 perror("Execl"); 1374 _exit(1); 1375 } 1376 default: 1377 (void)wait((int *)0); /* Wait for the shell to complete */ 1378 } 1379 return 1; 1380 } 1381 #endif /* !defined(TN3270) */ 1382 1383 /*VARARGS*/ 1384 static 1385 bye(argc, argv) 1386 int argc; /* Number of arguments */ 1387 char *argv[]; /* arguments */ 1388 { 1389 extern int resettermname; 1390 1391 if (connected) { 1392 (void) shutdown(net, 2); 1393 printf("Connection closed.\n"); 1394 (void) NetClose(net); 1395 connected = 0; 1396 resettermname = 1; 1397 #if defined(AUTHENTICATE) || defined(ENCRYPT) 1398 auth_encrypt_connect(connected); 1399 #endif 1400 /* reset options */ 1401 tninit(); 1402 #if defined(TN3270) 1403 SetIn3270(); /* Get out of 3270 mode */ 1404 #endif /* defined(TN3270) */ 1405 } 1406 if ((argc != 2) || (strcmp(argv[1], "fromquit") != 0)) { 1407 longjmp(toplevel, 1); 1408 /* NOTREACHED */ 1409 } 1410 return 1; /* Keep lint, etc., happy */ 1411 } 1412 1413 /*VARARGS*/ 1414 quit() 1415 { 1416 (void) call(bye, "bye", "fromquit", 0); 1417 Exit(0); 1418 /*NOTREACHED*/ 1419 } 1420 1421 /*VARARGS*/ 1422 int 1423 logout() 1424 { 1425 send_do(TELOPT_LOGOUT, 1); 1426 (void) netflush(); 1427 return 1; 1428 } 1429 1430 1431 /* 1432 * The SLC command. 1433 */ 1434 1435 struct slclist { 1436 char *name; 1437 char *help; 1438 void (*handler)(); 1439 int arg; 1440 }; 1441 1442 extern void slc_help(); 1443 1444 struct slclist SlcList[] = { 1445 { "export", "Use local special character definitions", 1446 slc_mode_export, 0 }, 1447 { "import", "Use remote special character definitions", 1448 slc_mode_import, 1 }, 1449 { "check", "Verify remote special character definitions", 1450 slc_mode_import, 0 }, 1451 { "help", 0, slc_help, 0 }, 1452 { "?", "Print help information", slc_help, 0 }, 1453 { 0 }, 1454 }; 1455 1456 static void 1457 slc_help() 1458 { 1459 struct slclist *c; 1460 1461 for (c = SlcList; c->name; c++) { 1462 if (c->help) { 1463 if (*c->help) 1464 printf("%-15s %s\n", c->name, c->help); 1465 else 1466 printf("\n"); 1467 } 1468 } 1469 } 1470 1471 static struct slclist * 1472 getslc(name) 1473 char *name; 1474 { 1475 return (struct slclist *) 1476 genget(name, (char **) SlcList, sizeof(struct slclist)); 1477 } 1478 1479 static 1480 slccmd(argc, argv) 1481 int argc; 1482 char *argv[]; 1483 { 1484 struct slclist *c; 1485 1486 if (argc != 2) { 1487 fprintf(stderr, 1488 "Need an argument to 'slc' command. 'slc ?' for help.\n"); 1489 return 0; 1490 } 1491 c = getslc(argv[1]); 1492 if (c == 0) { 1493 fprintf(stderr, "'%s': unknown argument ('slc ?' for help).\n", 1494 argv[1]); 1495 return 0; 1496 } 1497 if (Ambiguous(c)) { 1498 fprintf(stderr, "'%s': ambiguous argument ('slc ?' for help).\n", 1499 argv[1]); 1500 return 0; 1501 } 1502 (*c->handler)(c->arg); 1503 slcstate(); 1504 return 1; 1505 } 1506 1507 /* 1508 * The ENVIRON command. 1509 */ 1510 1511 struct envlist { 1512 char *name; 1513 char *help; 1514 void (*handler)(); 1515 int narg; 1516 }; 1517 1518 extern struct env_lst * 1519 env_define P((unsigned char *, unsigned char *)); 1520 extern void 1521 env_undefine P((unsigned char *)), 1522 env_export P((unsigned char *)), 1523 env_unexport P((unsigned char *)), 1524 env_send P((unsigned char *)), 1525 env_list P((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 auth_help P((void)); 1816 1817 struct authlist AuthList[] = { 1818 { "status", "Display current status of authentication information", 1819 auth_status, 0 }, 1820 { "disable", "Disable an authentication type ('auth disable ?' for more)", 1821 auth_disable, 1 }, 1822 { "enable", "Enable an authentication type ('auth enable ?' for more)", 1823 auth_enable, 1 }, 1824 { "help", 0, auth_help, 0 }, 1825 { "?", "Print help information", auth_help, 0 }, 1826 { 0 }, 1827 }; 1828 1829 static int 1830 auth_help() 1831 { 1832 struct authlist *c; 1833 1834 for (c = AuthList; c->name; c++) { 1835 if (c->help) { 1836 if (*c->help) 1837 printf("%-15s %s\n", c->name, c->help); 1838 else 1839 printf("\n"); 1840 } 1841 } 1842 return 0; 1843 } 1844 1845 auth_cmd(argc, argv) 1846 int argc; 1847 char *argv[]; 1848 { 1849 struct authlist *c; 1850 1851 c = (struct authlist *) 1852 genget(argv[1], (char **) AuthList, sizeof(struct authlist)); 1853 if (c == 0) { 1854 fprintf(stderr, "'%s': unknown argument ('auth ?' for help).\n", 1855 argv[1]); 1856 return 0; 1857 } 1858 if (Ambiguous(c)) { 1859 fprintf(stderr, "'%s': ambiguous argument ('auth ?' for help).\n", 1860 argv[1]); 1861 return 0; 1862 } 1863 if (c->narg + 2 != argc) { 1864 fprintf(stderr, 1865 "Need %s%d argument%s to 'auth %s' command. 'auth ?' for help.\n", 1866 c->narg < argc + 2 ? "only " : "", 1867 c->narg, c->narg == 1 ? "" : "s", c->name); 1868 return 0; 1869 } 1870 return((*c->handler)(argv[2], argv[3])); 1871 } 1872 #endif 1873 1874 #if defined(ENCRYPT) 1875 /* 1876 * The ENCRYPT command. 1877 */ 1878 1879 struct encryptlist { 1880 char *name; 1881 char *help; 1882 int (*handler)(); 1883 int needconnect; 1884 int minarg; 1885 int maxarg; 1886 }; 1887 1888 extern int 1889 EncryptEnable P((char *, char *)), 1890 EncryptDisable P((char *, char *)), 1891 EncryptType P((char *, char *)), 1892 EncryptStart P((char *)), 1893 EncryptStartInput P((void)), 1894 EncryptStartOutput P((void)), 1895 EncryptStop P((char *)), 1896 EncryptStopInput P((void)), 1897 EncryptStopOutput P((void)), 1898 EncryptStatus P((void)), 1899 EncryptHelp P((void)); 1900 1901 struct encryptlist EncryptList[] = { 1902 { "enable", "Enable encryption. ('encrypt enable ?' for more)", 1903 EncryptEnable, 1, 1, 2 }, 1904 { "disable", "Disable encryption. ('encrypt enable ?' for more)", 1905 EncryptDisable, 0, 1, 2 }, 1906 { "type", "Set encryptiong type. ('encrypt type ?' for more)", 1907 EncryptType, 0, 1, 1 }, 1908 { "start", "Start encryption. ('encrypt start ?' for more)", 1909 EncryptStart, 1, 0, 1 }, 1910 { "stop", "Stop encryption. ('encrypt stop ?' for more)", 1911 EncryptStop, 1, 0, 1 }, 1912 { "input", "Start encrypting the input stream", 1913 EncryptStartInput, 1, 0, 0 }, 1914 { "-input", "Stop encrypting the input stream", 1915 EncryptStopInput, 1, 0, 0 }, 1916 { "output", "Start encrypting the output stream", 1917 EncryptStartOutput, 1, 0, 0 }, 1918 { "-output", "Stop encrypting the output stream", 1919 EncryptStopOutput, 1, 0, 0 }, 1920 1921 { "status", "Display current status of authentication information", 1922 EncryptStatus, 0, 0, 0 }, 1923 { "help", 0, EncryptHelp, 0, 0, 0 }, 1924 { "?", "Print help information", EncryptHelp, 0, 0, 0 }, 1925 { 0 }, 1926 }; 1927 1928 static int 1929 EncryptHelp() 1930 { 1931 struct encryptlist *c; 1932 1933 for (c = EncryptList; c->name; c++) { 1934 if (c->help) { 1935 if (*c->help) 1936 printf("%-15s %s\n", c->name, c->help); 1937 else 1938 printf("\n"); 1939 } 1940 } 1941 return 0; 1942 } 1943 1944 encrypt_cmd(argc, argv) 1945 int argc; 1946 char *argv[]; 1947 { 1948 struct encryptlist *c; 1949 1950 c = (struct encryptlist *) 1951 genget(argv[1], (char **) EncryptList, sizeof(struct encryptlist)); 1952 if (c == 0) { 1953 fprintf(stderr, "'%s': unknown argument ('encrypt ?' for help).\n", 1954 argv[1]); 1955 return 0; 1956 } 1957 if (Ambiguous(c)) { 1958 fprintf(stderr, "'%s': ambiguous argument ('encrypt ?' for help).\n", 1959 argv[1]); 1960 return 0; 1961 } 1962 argc -= 2; 1963 if (argc < c->minarg || argc > c->maxarg) { 1964 if (c->minarg == c->maxarg) { 1965 fprintf(stderr, "Need %s%d argument%s ", 1966 c->minarg < argc ? "only " : "", c->minarg, 1967 c->minarg == 1 ? "" : "s"); 1968 } else { 1969 fprintf(stderr, "Need %s%d-%d arguments ", 1970 c->maxarg < argc ? "only " : "", c->minarg, c->maxarg); 1971 } 1972 fprintf(stderr, "to 'encrypt %s' command. 'encrypt ?' for help.\n", 1973 c->name); 1974 return 0; 1975 } 1976 if (c->needconnect && !connected) { 1977 if (!(argc && (isprefix(argv[2], "help") || isprefix(argv[2], "?")))) { 1978 printf("?Need to be connected first.\n"); 1979 return 0; 1980 } 1981 } 1982 return ((*c->handler)(argc > 0 ? argv[2] : 0, 1983 argc > 1 ? argv[3] : 0, 1984 argc > 2 ? argv[4] : 0)); 1985 } 1986 #endif 1987 1988 #if defined(unix) && defined(TN3270) 1989 static void 1990 filestuff(fd) 1991 int fd; 1992 { 1993 int res; 1994 1995 #ifdef F_GETOWN 1996 setconnmode(0); 1997 res = fcntl(fd, F_GETOWN, 0); 1998 setcommandmode(); 1999 2000 if (res == -1) { 2001 perror("fcntl"); 2002 return; 2003 } 2004 printf("\tOwner is %d.\n", res); 2005 #endif 2006 2007 setconnmode(0); 2008 res = fcntl(fd, F_GETFL, 0); 2009 setcommandmode(); 2010 2011 if (res == -1) { 2012 perror("fcntl"); 2013 return; 2014 } 2015 printf("\tFlags are 0x%x: %s\n", res, decodeflags(res)); 2016 } 2017 #endif /* defined(unix) && defined(TN3270) */ 2018 2019 /* 2020 * Print status about the connection. 2021 */ 2022 /*ARGSUSED*/ 2023 static 2024 status(argc, argv) 2025 int argc; 2026 char *argv[]; 2027 { 2028 if (connected) { 2029 printf("Connected to %s.\n", hostname); 2030 if ((argc < 2) || strcmp(argv[1], "notmuch")) { 2031 int mode = getconnmode(); 2032 2033 if (my_want_state_is_will(TELOPT_LINEMODE)) { 2034 printf("Operating with LINEMODE option\n"); 2035 printf("%s line editing\n", (mode&MODE_EDIT) ? "Local" : "No"); 2036 printf("%s catching of signals\n", 2037 (mode&MODE_TRAPSIG) ? "Local" : "No"); 2038 slcstate(); 2039 #ifdef KLUDGELINEMODE 2040 } else if (kludgelinemode && my_want_state_is_dont(TELOPT_SGA)) { 2041 printf("Operating in obsolete linemode\n"); 2042 #endif 2043 } else { 2044 printf("Operating in single character mode\n"); 2045 if (localchars) 2046 printf("Catching signals locally\n"); 2047 } 2048 printf("%s character echo\n", (mode&MODE_ECHO) ? "Local" : "Remote"); 2049 if (my_want_state_is_will(TELOPT_LFLOW)) 2050 printf("%s flow control\n", (mode&MODE_FLOW) ? "Local" : "No"); 2051 #if defined(ENCRYPT) 2052 encrypt_display(); 2053 #endif 2054 } 2055 } else { 2056 printf("No connection.\n"); 2057 } 2058 # if !defined(TN3270) 2059 printf("Escape character is '%s'.\n", control(escape)); 2060 (void) fflush(stdout); 2061 # else /* !defined(TN3270) */ 2062 if ((!In3270) && ((argc < 2) || strcmp(argv[1], "notmuch"))) { 2063 printf("Escape character is '%s'.\n", control(escape)); 2064 } 2065 # if defined(unix) 2066 if ((argc >= 2) && !strcmp(argv[1], "everything")) { 2067 printf("SIGIO received %d time%s.\n", 2068 sigiocount, (sigiocount == 1)? "":"s"); 2069 if (In3270) { 2070 printf("Process ID %d, process group %d.\n", 2071 getpid(), getpgrp(getpid())); 2072 printf("Terminal input:\n"); 2073 filestuff(tin); 2074 printf("Terminal output:\n"); 2075 filestuff(tout); 2076 printf("Network socket:\n"); 2077 filestuff(net); 2078 } 2079 } 2080 if (In3270 && transcom) { 2081 printf("Transparent mode command is '%s'.\n", transcom); 2082 } 2083 # endif /* defined(unix) */ 2084 (void) fflush(stdout); 2085 if (In3270) { 2086 return 0; 2087 } 2088 # endif /* defined(TN3270) */ 2089 return 1; 2090 } 2091 2092 #ifdef SIGINFO 2093 /* 2094 * Function that gets called when SIGINFO is received. 2095 */ 2096 ayt_status() 2097 { 2098 (void) call(status, "status", "notmuch", 0); 2099 } 2100 #endif 2101 2102 int 2103 tn(argc, argv) 2104 int argc; 2105 char *argv[]; 2106 { 2107 register struct hostent *host = 0; 2108 struct sockaddr_in sin; 2109 struct servent *sp = 0; 2110 unsigned long temp, inet_addr(); 2111 extern char *inet_ntoa(); 2112 #if defined(IP_OPTIONS) && defined(IPPROTO_IP) 2113 char *srp = 0, *strrchr(); 2114 unsigned long sourceroute(), srlen; 2115 #endif 2116 char *cmd, *hostp = 0, *portp = 0, *user = 0; 2117 2118 /* clear the socket address prior to use */ 2119 bzero((char *)&sin, sizeof(sin)); 2120 2121 if (connected) { 2122 printf("?Already connected to %s\n", hostname); 2123 setuid(getuid()); 2124 return 0; 2125 } 2126 if (argc < 2) { 2127 (void) strcpy(line, "open "); 2128 printf("(to) "); 2129 (void) fgets(&line[strlen(line)], sizeof(line) - strlen(line), stdin); 2130 makeargv(); 2131 argc = margc; 2132 argv = margv; 2133 } 2134 cmd = *argv; 2135 --argc; ++argv; 2136 while (argc) { 2137 if (isprefix(*argv, "help") || isprefix(*argv, "?")) 2138 goto usage; 2139 if (strcmp(*argv, "-l") == 0) { 2140 --argc; ++argv; 2141 if (argc == 0) 2142 goto usage; 2143 user = *argv++; 2144 --argc; 2145 continue; 2146 } 2147 if (strcmp(*argv, "-a") == 0) { 2148 --argc; ++argv; 2149 autologin = 1; 2150 continue; 2151 } 2152 if (hostp == 0) { 2153 hostp = *argv++; 2154 --argc; 2155 continue; 2156 } 2157 if (portp == 0) { 2158 portp = *argv++; 2159 --argc; 2160 continue; 2161 } 2162 usage: 2163 printf("usage: %s [-l user] [-a] host-name [port]\n", cmd); 2164 setuid(getuid()); 2165 return 0; 2166 } 2167 if (hostp == 0) 2168 goto usage; 2169 2170 #if defined(IP_OPTIONS) && defined(IPPROTO_IP) 2171 if (hostp[0] == '@' || hostp[0] == '!') { 2172 if ((hostname = strrchr(hostp, ':')) == NULL) 2173 hostname = strrchr(hostp, '@'); 2174 hostname++; 2175 srp = 0; 2176 temp = sourceroute(hostp, &srp, &srlen); 2177 if (temp == 0) { 2178 herror(srp); 2179 setuid(getuid()); 2180 return 0; 2181 } else if (temp == -1) { 2182 printf("Bad source route option: %s\n", hostp); 2183 setuid(getuid()); 2184 return 0; 2185 } else { 2186 sin.sin_addr.s_addr = temp; 2187 sin.sin_family = AF_INET; 2188 } 2189 } else { 2190 #endif 2191 temp = inet_addr(hostp); 2192 if (temp != (unsigned long) -1) { 2193 sin.sin_addr.s_addr = temp; 2194 sin.sin_family = AF_INET; 2195 (void) strcpy(_hostname, hostp); 2196 hostname = _hostname; 2197 } else { 2198 host = gethostbyname(hostp); 2199 if (host) { 2200 sin.sin_family = host->h_addrtype; 2201 #if defined(h_addr) /* In 4.3, this is a #define */ 2202 memcpy((caddr_t)&sin.sin_addr, 2203 host->h_addr_list[0], host->h_length); 2204 #else /* defined(h_addr) */ 2205 memcpy((caddr_t)&sin.sin_addr, host->h_addr, host->h_length); 2206 #endif /* defined(h_addr) */ 2207 strncpy(_hostname, host->h_name, sizeof(_hostname)); 2208 _hostname[sizeof(_hostname)-1] = '\0'; 2209 hostname = _hostname; 2210 } else { 2211 herror(hostp); 2212 setuid(getuid()); 2213 return 0; 2214 } 2215 } 2216 #if defined(IP_OPTIONS) && defined(IPPROTO_IP) 2217 } 2218 #endif 2219 if (portp) { 2220 if (*portp == '-') { 2221 portp++; 2222 telnetport = 1; 2223 } else 2224 telnetport = 0; 2225 sin.sin_port = atoi(portp); 2226 if (sin.sin_port == 0) { 2227 sp = getservbyname(portp, "tcp"); 2228 if (sp) 2229 sin.sin_port = sp->s_port; 2230 else { 2231 printf("%s: bad port number\n", portp); 2232 setuid(getuid()); 2233 return 0; 2234 } 2235 } else { 2236 #if !defined(htons) 2237 u_short htons(); 2238 #endif /* !defined(htons) */ 2239 sin.sin_port = htons(sin.sin_port); 2240 } 2241 } else { 2242 if (sp == 0) { 2243 sp = getservbyname("telnet", "tcp"); 2244 if (sp == 0) { 2245 fprintf(stderr, "telnet: tcp/telnet: unknown service\n"); 2246 setuid(getuid()); 2247 return 0; 2248 } 2249 sin.sin_port = sp->s_port; 2250 } 2251 telnetport = 1; 2252 } 2253 printf("Trying %s...\n", inet_ntoa(sin.sin_addr)); 2254 do { 2255 net = socket(AF_INET, SOCK_STREAM, 0); 2256 setuid(getuid()); 2257 if (net < 0) { 2258 perror("telnet: socket"); 2259 return 0; 2260 } 2261 #if defined(IP_OPTIONS) && defined(IPPROTO_IP) 2262 if (srp && setsockopt(net, IPPROTO_IP, IP_OPTIONS, (char *)srp, srlen) < 0) 2263 perror("setsockopt (IP_OPTIONS)"); 2264 #endif 2265 #if defined(IPPROTO_IP) && defined(IP_TOS) 2266 { 2267 # if defined(HAS_GETTOS) 2268 struct tosent *tp; 2269 if (tos < 0 && (tp = gettosbyname("telnet", "tcp"))) 2270 tos = tp->t_tos; 2271 # endif 2272 if (tos < 0) 2273 tos = 020; /* Low Delay bit */ 2274 if (tos 2275 && (setsockopt(net, IPPROTO_IP, IP_TOS, &tos, sizeof(int)) < 0) 2276 && (errno != ENOPROTOOPT)) 2277 perror("telnet: setsockopt (IP_TOS) (ignored)"); 2278 } 2279 #endif /* defined(IPPROTO_IP) && defined(IP_TOS) */ 2280 2281 if (debug && SetSockOpt(net, SOL_SOCKET, SO_DEBUG, 1) < 0) { 2282 perror("setsockopt (SO_DEBUG)"); 2283 } 2284 2285 if (connect(net, (struct sockaddr *)&sin, sizeof (sin)) < 0) { 2286 #if defined(h_addr) /* In 4.3, this is a #define */ 2287 if (host && host->h_addr_list[1]) { 2288 int oerrno = errno; 2289 2290 fprintf(stderr, "telnet: connect to address %s: ", 2291 inet_ntoa(sin.sin_addr)); 2292 errno = oerrno; 2293 perror((char *)0); 2294 host->h_addr_list++; 2295 memcpy((caddr_t)&sin.sin_addr, 2296 host->h_addr_list[0], host->h_length); 2297 (void) NetClose(net); 2298 continue; 2299 } 2300 #endif /* defined(h_addr) */ 2301 perror("telnet: Unable to connect to remote host"); 2302 return 0; 2303 } 2304 connected++; 2305 #if defined(AUTHENTICATE) || defined(ENCRYPT) 2306 auth_encrypt_connect(connected); 2307 #endif 2308 } while (connected == 0); 2309 cmdrc(hostp, hostname); 2310 if (autologin && user == NULL) { 2311 struct passwd *pw; 2312 2313 user = getenv("USER"); 2314 if (user == NULL || 2315 (pw = getpwnam(user)) && pw->pw_uid != getuid()) { 2316 if (pw = getpwuid(getuid())) 2317 user = pw->pw_name; 2318 else 2319 user = NULL; 2320 } 2321 } 2322 if (user) { 2323 env_define((unsigned char *)"USER", (unsigned char *)user); 2324 env_export((unsigned char *)"USER"); 2325 } 2326 (void) call(status, "status", "notmuch", 0); 2327 if (setjmp(peerdied) == 0) 2328 telnet(user); 2329 (void) NetClose(net); 2330 ExitString("Connection closed by foreign host.\n",1); 2331 /*NOTREACHED*/ 2332 } 2333 2334 #define HELPINDENT (sizeof ("connect")) 2335 2336 static char 2337 openhelp[] = "connect to a site", 2338 closehelp[] = "close current connection", 2339 logouthelp[] = "forcibly logout remote user and close the connection", 2340 quithelp[] = "exit telnet", 2341 statushelp[] = "print status information", 2342 helphelp[] = "print help information", 2343 sendhelp[] = "transmit special characters ('send ?' for more)", 2344 sethelp[] = "set operating parameters ('set ?' for more)", 2345 unsethelp[] = "unset operating parameters ('unset ?' for more)", 2346 togglestring[] ="toggle operating parameters ('toggle ?' for more)", 2347 slchelp[] = "change state of special charaters ('slc ?' for more)", 2348 displayhelp[] = "display operating parameters", 2349 #if defined(TN3270) && defined(unix) 2350 transcomhelp[] = "specify Unix command for transparent mode pipe", 2351 #endif /* defined(TN3270) && defined(unix) */ 2352 #if defined(AUTHENTICATE) 2353 authhelp[] = "turn on (off) authentication ('auth ?' for more)", 2354 #endif 2355 #if defined(ENCRYPT) 2356 encrypthelp[] = "turn on (off) encryption ('encrypt ?' for more)", 2357 #endif 2358 #if defined(unix) 2359 zhelp[] = "suspend telnet", 2360 #endif /* defined(unix) */ 2361 shellhelp[] = "invoke a subshell", 2362 envhelp[] = "change environment variables ('environ ?' for more)", 2363 modestring[] = "try to enter line or character mode ('mode ?' for more)"; 2364 2365 extern int help(); 2366 2367 static Command cmdtab[] = { 2368 { "close", closehelp, bye, 1 }, 2369 { "logout", logouthelp, logout, 1 }, 2370 { "display", displayhelp, display, 0 }, 2371 { "mode", modestring, modecmd, 0 }, 2372 { "open", openhelp, tn, 0 }, 2373 { "quit", quithelp, quit, 0 }, 2374 { "send", sendhelp, sendcmd, 0 }, 2375 { "set", sethelp, setcmd, 0 }, 2376 { "unset", unsethelp, unsetcmd, 0 }, 2377 { "status", statushelp, status, 0 }, 2378 { "toggle", togglestring, toggle, 0 }, 2379 { "slc", slchelp, slccmd, 0 }, 2380 #if defined(TN3270) && defined(unix) 2381 { "transcom", transcomhelp, settranscom, 0 }, 2382 #endif /* defined(TN3270) && defined(unix) */ 2383 #if defined(AUTHENTICATE) 2384 { "auth", authhelp, auth_cmd, 0 }, 2385 #endif 2386 #if defined(ENCRYPT) 2387 { "encrypt", encrypthelp, encrypt_cmd, 0 }, 2388 #endif 2389 #if defined(unix) 2390 { "z", zhelp, suspend, 0 }, 2391 #endif /* defined(unix) */ 2392 #if defined(TN3270) 2393 { "!", shellhelp, shell, 1 }, 2394 #else 2395 { "!", shellhelp, shell, 0 }, 2396 #endif 2397 { "environ", envhelp, env_cmd, 0 }, 2398 { "?", helphelp, help, 0 }, 2399 0 2400 }; 2401 2402 static char crmodhelp[] = "deprecated command -- use 'toggle crmod' instead"; 2403 static char escapehelp[] = "deprecated command -- use 'set escape' instead"; 2404 2405 static Command cmdtab2[] = { 2406 { "help", 0, help, 0 }, 2407 { "escape", escapehelp, setescape, 0 }, 2408 { "crmod", crmodhelp, togcrmod, 0 }, 2409 0 2410 }; 2411 2412 2413 /* 2414 * Call routine with argc, argv set from args (terminated by 0). 2415 */ 2416 2417 /*VARARGS1*/ 2418 static 2419 call(va_alist) 2420 va_dcl 2421 { 2422 va_list ap; 2423 typedef int (*intrtn_t)(); 2424 intrtn_t routine; 2425 char *args[100]; 2426 int argno = 0; 2427 2428 va_start(ap); 2429 routine = (va_arg(ap, intrtn_t)); 2430 while ((args[argno++] = va_arg(ap, char *)) != 0) { 2431 ; 2432 } 2433 va_end(ap); 2434 return (*routine)(argno-1, args); 2435 } 2436 2437 2438 static Command * 2439 getcmd(name) 2440 char *name; 2441 { 2442 Command *cm; 2443 2444 if (cm = (Command *) genget(name, (char **) cmdtab, sizeof(Command))) 2445 return cm; 2446 return (Command *) genget(name, (char **) cmdtab2, sizeof(Command)); 2447 } 2448 2449 void 2450 command(top, tbuf, cnt) 2451 int top; 2452 char *tbuf; 2453 int cnt; 2454 { 2455 register Command *c; 2456 2457 setcommandmode(); 2458 if (!top) { 2459 putchar('\n'); 2460 #if defined(unix) 2461 } else { 2462 (void) signal(SIGINT, SIG_DFL); 2463 (void) signal(SIGQUIT, SIG_DFL); 2464 #endif /* defined(unix) */ 2465 } 2466 for (;;) { 2467 if (rlogin == _POSIX_VDISABLE) 2468 printf("%s> ", prompt); 2469 if (tbuf) { 2470 register char *cp; 2471 cp = line; 2472 while (cnt > 0 && (*cp++ = *tbuf++) != '\n') 2473 cnt--; 2474 tbuf = 0; 2475 if (cp == line || *--cp != '\n' || cp == line) 2476 goto getline; 2477 *cp = '\0'; 2478 if (rlogin == _POSIX_VDISABLE) 2479 printf("%s\n", line); 2480 } else { 2481 getline: 2482 if (rlogin != _POSIX_VDISABLE) 2483 printf("%s> ", prompt); 2484 if (fgets(line, sizeof(line), stdin) == NULL) { 2485 if (feof(stdin) || ferror(stdin)) { 2486 (void) quit(); 2487 /*NOTREACHED*/ 2488 } 2489 break; 2490 } 2491 } 2492 if (line[0] == 0) 2493 break; 2494 makeargv(); 2495 if (margv[0] == 0) { 2496 break; 2497 } 2498 c = getcmd(margv[0]); 2499 if (Ambiguous(c)) { 2500 printf("?Ambiguous command\n"); 2501 continue; 2502 } 2503 if (c == 0) { 2504 printf("?Invalid command\n"); 2505 continue; 2506 } 2507 if (c->needconnect && !connected) { 2508 printf("?Need to be connected first.\n"); 2509 continue; 2510 } 2511 if ((*c->handler)(margc, margv)) { 2512 break; 2513 } 2514 } 2515 if (!top) { 2516 if (!connected) { 2517 longjmp(toplevel, 1); 2518 /*NOTREACHED*/ 2519 } 2520 #if defined(TN3270) 2521 if (shell_active == 0) { 2522 setconnmode(0); 2523 } 2524 #else /* defined(TN3270) */ 2525 setconnmode(0); 2526 #endif /* defined(TN3270) */ 2527 } 2528 } 2529 2530 /* 2531 * Help command. 2532 */ 2533 static 2534 help(argc, argv) 2535 int argc; 2536 char *argv[]; 2537 { 2538 register Command *c; 2539 2540 if (argc == 1) { 2541 printf("Commands may be abbreviated. Commands are:\n\n"); 2542 for (c = cmdtab; c->name; c++) 2543 if (c->help) { 2544 printf("%-*s\t%s\n", HELPINDENT, c->name, 2545 c->help); 2546 } 2547 return 0; 2548 } 2549 while (--argc > 0) { 2550 register char *arg; 2551 arg = *++argv; 2552 c = getcmd(arg); 2553 if (Ambiguous(c)) 2554 printf("?Ambiguous help command %s\n", arg); 2555 else if (c == (Command *)0) 2556 printf("?Invalid help command %s\n", arg); 2557 else 2558 printf("%s\n", c->help); 2559 } 2560 return 0; 2561 } 2562 2563 static char *rcname = 0; 2564 static char rcbuf[128]; 2565 2566 cmdrc(m1, m2) 2567 char *m1, *m2; 2568 { 2569 register Command *c; 2570 FILE *rcfile; 2571 int gotmachine = 0; 2572 int l1 = strlen(m1); 2573 int l2 = strlen(m2); 2574 char m1save[64]; 2575 2576 if (skiprc) 2577 return; 2578 2579 strcpy(m1save, m1); 2580 m1 = m1save; 2581 2582 if (rcname == 0) { 2583 rcname = getenv("HOME"); 2584 if (rcname) 2585 strcpy(rcbuf, rcname); 2586 else 2587 rcbuf[0] = '\0'; 2588 strcat(rcbuf, "/.telnetrc"); 2589 rcname = rcbuf; 2590 } 2591 2592 if ((rcfile = fopen(rcname, "r")) == 0) { 2593 return; 2594 } 2595 2596 for (;;) { 2597 if (fgets(line, sizeof(line), rcfile) == NULL) 2598 break; 2599 if (line[0] == 0) 2600 break; 2601 if (line[0] == '#') 2602 continue; 2603 if (gotmachine) { 2604 if (!isspace(line[0])) 2605 gotmachine = 0; 2606 } 2607 if (gotmachine == 0) { 2608 if (isspace(line[0])) 2609 continue; 2610 if (strncasecmp(line, m1, l1) == 0) 2611 strncpy(line, &line[l1], sizeof(line) - l1); 2612 else if (strncasecmp(line, m2, l2) == 0) 2613 strncpy(line, &line[l2], sizeof(line) - l2); 2614 else if (strncasecmp(line, "DEFAULT", 7) == 0) 2615 strncpy(line, &line[7], sizeof(line) - 7); 2616 else 2617 continue; 2618 if (line[0] != ' ' && line[0] != '\t' && line[0] != '\n') 2619 continue; 2620 gotmachine = 1; 2621 } 2622 makeargv(); 2623 if (margv[0] == 0) 2624 continue; 2625 c = getcmd(margv[0]); 2626 if (Ambiguous(c)) { 2627 printf("?Ambiguous command: %s\n", margv[0]); 2628 continue; 2629 } 2630 if (c == 0) { 2631 printf("?Invalid command: %s\n", margv[0]); 2632 continue; 2633 } 2634 /* 2635 * This should never happen... 2636 */ 2637 if (c->needconnect && !connected) { 2638 printf("?Need to be connected first for %s.\n", margv[0]); 2639 continue; 2640 } 2641 (*c->handler)(margc, margv); 2642 } 2643 fclose(rcfile); 2644 } 2645 2646 #if defined(IP_OPTIONS) && defined(IPPROTO_IP) 2647 2648 /* 2649 * Source route is handed in as 2650 * [!]@hop1@hop2...[@|:]dst 2651 * If the leading ! is present, it is a 2652 * strict source route, otherwise it is 2653 * assmed to be a loose source route. 2654 * 2655 * We fill in the source route option as 2656 * hop1,hop2,hop3...dest 2657 * and return a pointer to hop1, which will 2658 * be the address to connect() to. 2659 * 2660 * Arguments: 2661 * arg: pointer to route list to decipher 2662 * 2663 * cpp: If *cpp is not equal to NULL, this is a 2664 * pointer to a pointer to a character array 2665 * that should be filled in with the option. 2666 * 2667 * lenp: pointer to an integer that contains the 2668 * length of *cpp if *cpp != NULL. 2669 * 2670 * Return values: 2671 * 2672 * Returns the address of the host to connect to. If the 2673 * return value is -1, there was a syntax error in the 2674 * option, either unknown characters, or too many hosts. 2675 * If the return value is 0, one of the hostnames in the 2676 * path is unknown, and *cpp is set to point to the bad 2677 * hostname. 2678 * 2679 * *cpp: If *cpp was equal to NULL, it will be filled 2680 * in with a pointer to our static area that has 2681 * the option filled in. This will be 32bit aligned. 2682 * 2683 * *lenp: This will be filled in with how long the option 2684 * pointed to by *cpp is. 2685 * 2686 */ 2687 unsigned long 2688 sourceroute(arg, cpp, lenp) 2689 char *arg; 2690 char **cpp; 2691 int *lenp; 2692 { 2693 static char lsr[44]; 2694 char *cp, *cp2, *lsrp, *lsrep; 2695 register int tmp; 2696 struct in_addr sin_addr; 2697 register struct hostent *host = 0; 2698 register char c; 2699 2700 /* 2701 * Verify the arguments, and make sure we have 2702 * at least 7 bytes for the option. 2703 */ 2704 if (cpp == NULL || lenp == NULL) 2705 return((unsigned long)-1); 2706 if (*cpp != NULL && *lenp < 7) 2707 return((unsigned long)-1); 2708 /* 2709 * Decide whether we have a buffer passed to us, 2710 * or if we need to use our own static buffer. 2711 */ 2712 if (*cpp) { 2713 lsrp = *cpp; 2714 lsrep = lsrp + *lenp; 2715 } else { 2716 *cpp = lsrp = lsr; 2717 lsrep = lsrp + 44; 2718 } 2719 2720 cp = arg; 2721 2722 /* 2723 * Next, decide whether we have a loose source 2724 * route or a strict source route, and fill in 2725 * the begining of the option. 2726 */ 2727 if (*cp == '!') { 2728 cp++; 2729 *lsrp++ = IPOPT_SSRR; 2730 } else 2731 *lsrp++ = IPOPT_LSRR; 2732 2733 if (*cp != '@') 2734 return((unsigned long)-1); 2735 2736 lsrp++; /* skip over length, we'll fill it in later */ 2737 *lsrp++ = 4; 2738 2739 cp++; 2740 2741 sin_addr.s_addr = 0; 2742 2743 for (c = 0;;) { 2744 if (c == ':') 2745 cp2 = 0; 2746 else for (cp2 = cp; c = *cp2; cp2++) { 2747 if (c == ',') { 2748 *cp2++ = '\0'; 2749 if (*cp2 == '@') 2750 cp2++; 2751 } else if (c == '@') { 2752 *cp2++ = '\0'; 2753 } else if (c == ':') { 2754 *cp2++ = '\0'; 2755 } else 2756 continue; 2757 break; 2758 } 2759 if (!c) 2760 cp2 = 0; 2761 2762 if ((tmp = inet_addr(cp)) != -1) { 2763 sin_addr.s_addr = tmp; 2764 } else if (host = gethostbyname(cp)) { 2765 #if defined(h_addr) 2766 memcpy((caddr_t)&sin_addr, 2767 host->h_addr_list[0], host->h_length); 2768 #else 2769 memcpy((caddr_t)&sin_addr, host->h_addr, host->h_length); 2770 #endif 2771 } else { 2772 *cpp = cp; 2773 return(0); 2774 } 2775 memcpy(lsrp, (char *)&sin_addr, 4); 2776 lsrp += 4; 2777 if (cp2) 2778 cp = cp2; 2779 else 2780 break; 2781 /* 2782 * Check to make sure there is space for next address 2783 */ 2784 if (lsrp + 4 > lsrep) 2785 return((unsigned long)-1); 2786 } 2787 if ((*(*cpp+IPOPT_OLEN) = lsrp - *cpp) <= 7) { 2788 *cpp = 0; 2789 *lenp = 0; 2790 return((unsigned long)-1); 2791 } 2792 *lsrp++ = IPOPT_NOP; /* 32 bit word align it */ 2793 *lenp = lsrp - *cpp; 2794 return(sin_addr.s_addr); 2795 } 2796 #endif 2797