1 /* 2 * Copyright (c) 1988, 1990, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 #ifndef lint 35 /* from: static char sccsid[] = "@(#)commands.c 8.1 (Berkeley) 6/6/93"; */ 36 static char *rcsid = "$Id: commands.c,v 1.6 1994/05/08 20:42:26 mycroft Exp $"; 37 #endif /* not lint */ 38 39 #if defined(unix) 40 #include <sys/param.h> 41 #if defined(CRAY) || defined(sysV88) 42 #include <sys/types.h> 43 #endif 44 #include <sys/file.h> 45 #else 46 #include <sys/types.h> 47 #endif /* defined(unix) */ 48 #include <sys/socket.h> 49 #include <netinet/in.h> 50 #ifdef CRAY 51 #include <fcntl.h> 52 #endif /* CRAY */ 53 54 #include <signal.h> 55 #include <netdb.h> 56 #include <ctype.h> 57 #include <pwd.h> 58 #include <varargs.h> 59 #include <errno.h> 60 61 #include <arpa/telnet.h> 62 63 #include "general.h" 64 65 #include "ring.h" 66 67 #include "externs.h" 68 #include "defines.h" 69 #include "types.h" 70 71 #if !defined(CRAY) && !defined(sysV88) 72 #include <netinet/in_systm.h> 73 # if (defined(vax) || defined(tahoe) || defined(hp300)) && !defined(ultrix) 74 # include <machine/endian.h> 75 # endif /* vax */ 76 #endif /* !defined(CRAY) && !defined(sysV88) */ 77 #include <netinet/ip.h> 78 79 80 #ifndef MAXHOSTNAMELEN 81 #define MAXHOSTNAMELEN 64 82 #endif MAXHOSTNAMELEN 83 84 #if defined(IPPROTO_IP) && defined(IP_TOS) 85 int tos = -1; 86 #endif /* defined(IPPROTO_IP) && defined(IP_TOS) */ 87 88 char *hostname; 89 static char _hostname[MAXHOSTNAMELEN]; 90 91 extern char *getenv(); 92 93 extern int isprefix(); 94 extern char **genget(); 95 extern int Ambiguous(); 96 97 static call(); 98 99 typedef struct { 100 char *name; /* command name */ 101 char *help; /* help string (NULL for no help) */ 102 int (*handler)(); /* routine which executes command */ 103 int needconnect; /* Do we need to be connected to execute? */ 104 } Command; 105 106 static char line[256]; 107 static char saveline[256]; 108 static int margc; 109 static char *margv[20]; 110 111 static void 112 makeargv() 113 { 114 register char *cp, *cp2, c; 115 register char **argp = margv; 116 117 margc = 0; 118 cp = line; 119 if (*cp == '!') { /* Special case shell escape */ 120 strcpy(saveline, line); /* save for shell command */ 121 *argp++ = "!"; /* No room in string to get this */ 122 margc++; 123 cp++; 124 } 125 while (c = *cp) { 126 register int inquote = 0; 127 while (isspace(c)) 128 c = *++cp; 129 if (c == '\0') 130 break; 131 *argp++ = cp; 132 margc += 1; 133 for (cp2 = cp; c != '\0'; c = *++cp) { 134 if (inquote) { 135 if (c == inquote) { 136 inquote = 0; 137 continue; 138 } 139 } else { 140 if (c == '\\') { 141 if ((c = *++cp) == '\0') 142 break; 143 } else if (c == '"') { 144 inquote = '"'; 145 continue; 146 } else if (c == '\'') { 147 inquote = '\''; 148 continue; 149 } else if (isspace(c)) 150 break; 151 } 152 *cp2++ = c; 153 } 154 *cp2 = '\0'; 155 if (c == '\0') 156 break; 157 cp++; 158 } 159 *argp++ = 0; 160 } 161 162 /* 163 * Make a character string into a number. 164 * 165 * Todo: 1. Could take random integers (12, 0x12, 012, 0b1). 166 */ 167 168 static 169 special(s) 170 register char *s; 171 { 172 register char c; 173 char b; 174 175 switch (*s) { 176 case '^': 177 b = *++s; 178 if (b == '?') { 179 c = b | 0x40; /* DEL */ 180 } else { 181 c = b & 0x1f; 182 } 183 break; 184 default: 185 c = *s; 186 break; 187 } 188 return c; 189 } 190 191 /* 192 * Construct a control character sequence 193 * for a special character. 194 */ 195 static char * 196 control(c) 197 register cc_t c; 198 { 199 static char buf[5]; 200 /* 201 * The only way I could get the Sun 3.5 compiler 202 * to shut up about 203 * if ((unsigned int)c >= 0x80) 204 * was to assign "c" to an unsigned int variable... 205 * Arggg.... 206 */ 207 register unsigned int uic = (unsigned int)c; 208 209 if (uic == 0x7f) 210 return ("^?"); 211 if (c == (cc_t)_POSIX_VDISABLE) { 212 return "off"; 213 } 214 if (uic >= 0x80) { 215 buf[0] = '\\'; 216 buf[1] = ((c>>6)&07) + '0'; 217 buf[2] = ((c>>3)&07) + '0'; 218 buf[3] = (c&07) + '0'; 219 buf[4] = 0; 220 } else if (uic >= 0x20) { 221 buf[0] = c; 222 buf[1] = 0; 223 } else { 224 buf[0] = '^'; 225 buf[1] = '@'+c; 226 buf[2] = 0; 227 } 228 return (buf); 229 } 230 231 232 233 /* 234 * The following are data structures and routines for 235 * the "send" command. 236 * 237 */ 238 239 struct sendlist { 240 char *name; /* How user refers to it (case independent) */ 241 char *help; /* Help information (0 ==> no help) */ 242 int needconnect; /* Need to be connected */ 243 int narg; /* Number of arguments */ 244 int (*handler)(); /* Routine to perform (for special ops) */ 245 int nbyte; /* Number of bytes to send this command */ 246 int what; /* Character to be sent (<0 ==> special) */ 247 }; 248 249 250 static int 251 send_esc P((void)), 252 send_help P((void)), 253 send_docmd P((char *)), 254 send_dontcmd P((char *)), 255 send_willcmd P((char *)), 256 send_wontcmd P((char *)); 257 258 static struct sendlist Sendlist[] = { 259 { "ao", "Send Telnet Abort output", 1, 0, 0, 2, AO }, 260 { "ayt", "Send Telnet 'Are You There'", 1, 0, 0, 2, AYT }, 261 { "brk", "Send Telnet Break", 1, 0, 0, 2, BREAK }, 262 { "break", 0, 1, 0, 0, 2, BREAK }, 263 { "ec", "Send Telnet Erase Character", 1, 0, 0, 2, EC }, 264 { "el", "Send Telnet Erase Line", 1, 0, 0, 2, EL }, 265 { "escape", "Send current escape character", 1, 0, send_esc, 1, 0 }, 266 { "ga", "Send Telnet 'Go Ahead' sequence", 1, 0, 0, 2, GA }, 267 { "ip", "Send Telnet Interrupt Process", 1, 0, 0, 2, IP }, 268 { "intp", 0, 1, 0, 0, 2, IP }, 269 { "interrupt", 0, 1, 0, 0, 2, IP }, 270 { "intr", 0, 1, 0, 0, 2, IP }, 271 { "nop", "Send Telnet 'No operation'", 1, 0, 0, 2, NOP }, 272 { "eor", "Send Telnet 'End of Record'", 1, 0, 0, 2, EOR }, 273 { "abort", "Send Telnet 'Abort Process'", 1, 0, 0, 2, ABORT }, 274 { "susp", "Send Telnet 'Suspend Process'", 1, 0, 0, 2, SUSP }, 275 { "eof", "Send Telnet End of File Character", 1, 0, 0, 2, xEOF }, 276 { "synch", "Perform Telnet 'Synch operation'", 1, 0, dosynch, 2, 0 }, 277 { "getstatus", "Send request for STATUS", 1, 0, get_status, 6, 0 }, 278 { "?", "Display send options", 0, 0, send_help, 0, 0 }, 279 { "help", 0, 0, 0, send_help, 0, 0 }, 280 { "do", 0, 0, 1, send_docmd, 3, 0 }, 281 { "dont", 0, 0, 1, send_dontcmd, 3, 0 }, 282 { "will", 0, 0, 1, send_willcmd, 3, 0 }, 283 { "wont", 0, 0, 1, send_wontcmd, 3, 0 }, 284 { 0 } 285 }; 286 287 #define GETSEND(name) ((struct sendlist *) genget(name, (char **) Sendlist, \ 288 sizeof(struct sendlist))) 289 290 static int 291 sendcmd(argc, argv) 292 int argc; 293 char **argv; 294 { 295 int count; /* how many bytes we are going to need to send */ 296 int i; 297 int question = 0; /* was at least one argument a question */ 298 struct sendlist *s; /* pointer to current command */ 299 int success = 0; 300 int needconnect = 0; 301 302 if (argc < 2) { 303 printf("need at least one argument for 'send' command\n"); 304 printf("'send ?' for help\n"); 305 return 0; 306 } 307 /* 308 * First, validate all the send arguments. 309 * In addition, we see how much space we are going to need, and 310 * whether or not we will be doing a "SYNCH" operation (which 311 * flushes the network queue). 312 */ 313 count = 0; 314 for (i = 1; i < argc; i++) { 315 s = GETSEND(argv[i]); 316 if (s == 0) { 317 printf("Unknown send argument '%s'\n'send ?' for help.\n", 318 argv[i]); 319 return 0; 320 } else if (Ambiguous(s)) { 321 printf("Ambiguous send argument '%s'\n'send ?' for help.\n", 322 argv[i]); 323 return 0; 324 } 325 if (i + s->narg >= argc) { 326 fprintf(stderr, 327 "Need %d argument%s to 'send %s' command. 'send %s ?' for help.\n", 328 s->narg, s->narg == 1 ? "" : "s", s->name, s->name); 329 return 0; 330 } 331 count += s->nbyte; 332 if (s->handler == send_help) { 333 send_help(); 334 return 0; 335 } 336 337 i += s->narg; 338 needconnect += s->needconnect; 339 } 340 if (!connected && needconnect) { 341 printf("?Need to be connected first.\n"); 342 printf("'send ?' for help\n"); 343 return 0; 344 } 345 /* Now, do we have enough room? */ 346 if (NETROOM() < count) { 347 printf("There is not enough room in the buffer TO the network\n"); 348 printf("to process your request. Nothing will be done.\n"); 349 printf("('send synch' will throw away most data in the network\n"); 350 printf("buffer, if this might help.)\n"); 351 return 0; 352 } 353 /* OK, they are all OK, now go through again and actually send */ 354 count = 0; 355 for (i = 1; i < argc; i++) { 356 if ((s = GETSEND(argv[i])) == 0) { 357 fprintf(stderr, "Telnet 'send' error - argument disappeared!\n"); 358 (void) quit(); 359 /*NOTREACHED*/ 360 } 361 if (s->handler) { 362 count++; 363 success += (*s->handler)((s->narg > 0) ? argv[i+1] : 0, 364 (s->narg > 1) ? argv[i+2] : 0); 365 i += s->narg; 366 } else { 367 NET2ADD(IAC, s->what); 368 printoption("SENT", IAC, s->what); 369 } 370 } 371 return (count == success); 372 } 373 374 static int 375 send_esc() 376 { 377 NETADD(escape); 378 return 1; 379 } 380 381 static int 382 send_docmd(name) 383 char *name; 384 { 385 return(send_tncmd(send_do, "do", name)); 386 } 387 388 static int 389 send_dontcmd(name) 390 char *name; 391 { 392 return(send_tncmd(send_dont, "dont", name)); 393 } 394 static int 395 send_willcmd(name) 396 char *name; 397 { 398 return(send_tncmd(send_will, "will", name)); 399 } 400 static int 401 send_wontcmd(name) 402 char *name; 403 { 404 return(send_tncmd(send_wont, "wont", name)); 405 } 406 407 int 408 send_tncmd(func, cmd, name) 409 void (*func)(); 410 char *cmd, *name; 411 { 412 char **cpp; 413 extern char *telopts[]; 414 register int val = 0; 415 416 if (isprefix(name, "help") || isprefix(name, "?")) { 417 register int col, len; 418 419 printf("Usage: send %s <value|option>\n", cmd); 420 printf("\"value\" must be from 0 to 255\n"); 421 printf("Valid options are:\n\t"); 422 423 col = 8; 424 for (cpp = telopts; *cpp; cpp++) { 425 len = strlen(*cpp) + 3; 426 if (col + len > 65) { 427 printf("\n\t"); 428 col = 8; 429 } 430 printf(" \"%s\"", *cpp); 431 col += len; 432 } 433 printf("\n"); 434 return 0; 435 } 436 cpp = (char **)genget(name, telopts, sizeof(char *)); 437 if (Ambiguous(cpp)) { 438 fprintf(stderr,"'%s': ambiguous argument ('send %s ?' for help).\n", 439 name, cmd); 440 return 0; 441 } 442 if (cpp) { 443 val = cpp - telopts; 444 } else { 445 register char *cp = name; 446 447 while (*cp >= '0' && *cp <= '9') { 448 val *= 10; 449 val += *cp - '0'; 450 cp++; 451 } 452 if (*cp != 0) { 453 fprintf(stderr, "'%s': unknown argument ('send %s ?' for help).\n", 454 name, cmd); 455 return 0; 456 } else if (val < 0 || val > 255) { 457 fprintf(stderr, "'%s': bad value ('send %s ?' for help).\n", 458 name, cmd); 459 return 0; 460 } 461 } 462 if (!connected) { 463 printf("?Need to be connected first.\n"); 464 return 0; 465 } 466 (*func)(val, 1); 467 return 1; 468 } 469 470 static int 471 send_help() 472 { 473 struct sendlist *s; /* pointer to current command */ 474 for (s = Sendlist; s->name; s++) { 475 if (s->help) 476 printf("%-15s %s\n", s->name, s->help); 477 } 478 return(0); 479 } 480 481 /* 482 * The following are the routines and data structures referred 483 * to by the arguments to the "toggle" command. 484 */ 485 486 static int 487 lclchars() 488 { 489 donelclchars = 1; 490 return 1; 491 } 492 493 static int 494 togdebug() 495 { 496 #ifndef NOT43 497 if (net > 0 && 498 (SetSockOpt(net, SOL_SOCKET, SO_DEBUG, debug)) < 0) { 499 perror("setsockopt (SO_DEBUG)"); 500 } 501 #else /* NOT43 */ 502 if (debug) { 503 if (net > 0 && SetSockOpt(net, SOL_SOCKET, SO_DEBUG, 0, 0) < 0) 504 perror("setsockopt (SO_DEBUG)"); 505 } else 506 printf("Cannot turn off socket debugging\n"); 507 #endif /* NOT43 */ 508 return 1; 509 } 510 511 512 static int 513 togcrlf() 514 { 515 if (crlf) { 516 printf("Will send carriage returns as telnet <CR><LF>.\n"); 517 } else { 518 printf("Will send carriage returns as telnet <CR><NUL>.\n"); 519 } 520 return 1; 521 } 522 523 int binmode; 524 525 static int 526 togbinary(val) 527 int val; 528 { 529 donebinarytoggle = 1; 530 531 if (val >= 0) { 532 binmode = val; 533 } else { 534 if (my_want_state_is_will(TELOPT_BINARY) && 535 my_want_state_is_do(TELOPT_BINARY)) { 536 binmode = 1; 537 } else if (my_want_state_is_wont(TELOPT_BINARY) && 538 my_want_state_is_dont(TELOPT_BINARY)) { 539 binmode = 0; 540 } 541 val = binmode ? 0 : 1; 542 } 543 544 if (val == 1) { 545 if (my_want_state_is_will(TELOPT_BINARY) && 546 my_want_state_is_do(TELOPT_BINARY)) { 547 printf("Already operating in binary mode with remote host.\n"); 548 } else { 549 printf("Negotiating binary mode with remote host.\n"); 550 tel_enter_binary(3); 551 } 552 } else { 553 if (my_want_state_is_wont(TELOPT_BINARY) && 554 my_want_state_is_dont(TELOPT_BINARY)) { 555 printf("Already in network ascii mode with remote host.\n"); 556 } else { 557 printf("Negotiating network ascii mode with remote host.\n"); 558 tel_leave_binary(3); 559 } 560 } 561 return 1; 562 } 563 564 static int 565 togrbinary(val) 566 int val; 567 { 568 donebinarytoggle = 1; 569 570 if (val == -1) 571 val = my_want_state_is_do(TELOPT_BINARY) ? 0 : 1; 572 573 if (val == 1) { 574 if (my_want_state_is_do(TELOPT_BINARY)) { 575 printf("Already receiving in binary mode.\n"); 576 } else { 577 printf("Negotiating binary mode on input.\n"); 578 tel_enter_binary(1); 579 } 580 } else { 581 if (my_want_state_is_dont(TELOPT_BINARY)) { 582 printf("Already receiving in network ascii mode.\n"); 583 } else { 584 printf("Negotiating network ascii mode on input.\n"); 585 tel_leave_binary(1); 586 } 587 } 588 return 1; 589 } 590 591 static int 592 togxbinary(val) 593 int val; 594 { 595 donebinarytoggle = 1; 596 597 if (val == -1) 598 val = my_want_state_is_will(TELOPT_BINARY) ? 0 : 1; 599 600 if (val == 1) { 601 if (my_want_state_is_will(TELOPT_BINARY)) { 602 printf("Already transmitting in binary mode.\n"); 603 } else { 604 printf("Negotiating binary mode on output.\n"); 605 tel_enter_binary(2); 606 } 607 } else { 608 if (my_want_state_is_wont(TELOPT_BINARY)) { 609 printf("Already transmitting in network ascii mode.\n"); 610 } else { 611 printf("Negotiating network ascii mode on output.\n"); 612 tel_leave_binary(2); 613 } 614 } 615 return 1; 616 } 617 618 619 static int togglehelp P((void)); 620 #if defined(AUTHENTICATION) 621 extern int auth_togdebug P((int)); 622 #endif 623 624 struct togglelist { 625 char *name; /* name of toggle */ 626 char *help; /* help message */ 627 int (*handler)(); /* routine to do actual setting */ 628 int *variable; 629 char *actionexplanation; 630 }; 631 632 static struct togglelist Togglelist[] = { 633 { "autoflush", 634 "flushing of output when sending interrupt characters", 635 0, 636 &autoflush, 637 "flush output when sending interrupt characters" }, 638 { "autosynch", 639 "automatic sending of interrupt characters in urgent mode", 640 0, 641 &autosynch, 642 "send interrupt characters in urgent mode" }, 643 #if defined(AUTHENTICATION) 644 { "autologin", 645 "automatic sending of login and/or authentication info", 646 0, 647 &autologin, 648 "send login name and/or authentication information" }, 649 { "authdebug", 650 "Toggle authentication debugging", 651 auth_togdebug, 652 0, 653 "print authentication debugging information" }, 654 #endif 655 { "skiprc", 656 "don't read ~/.telnetrc file", 657 0, 658 &skiprc, 659 "skip reading of ~/.telnetrc file" }, 660 { "binary", 661 "sending and receiving of binary data", 662 togbinary, 663 0, 664 0 }, 665 { "inbinary", 666 "receiving of binary data", 667 togrbinary, 668 0, 669 0 }, 670 { "outbinary", 671 "sending of binary data", 672 togxbinary, 673 0, 674 0 }, 675 { "crlf", 676 "sending carriage returns as telnet <CR><LF>", 677 togcrlf, 678 &crlf, 679 0 }, 680 { "crmod", 681 "mapping of received carriage returns", 682 0, 683 &crmod, 684 "map carriage return on output" }, 685 { "localchars", 686 "local recognition of certain control characters", 687 lclchars, 688 &localchars, 689 "recognize certain control characters" }, 690 { " ", "", 0 }, /* empty line */ 691 #if defined(unix) && defined(TN3270) 692 { "apitrace", 693 "(debugging) toggle tracing of API transactions", 694 0, 695 &apitrace, 696 "trace API transactions" }, 697 { "cursesdata", 698 "(debugging) toggle printing of hexadecimal curses data", 699 0, 700 &cursesdata, 701 "print hexadecimal representation of curses data" }, 702 #endif /* defined(unix) && defined(TN3270) */ 703 { "debug", 704 "debugging", 705 togdebug, 706 &debug, 707 "turn on socket level debugging" }, 708 { "netdata", 709 "printing of hexadecimal network data (debugging)", 710 0, 711 &netdata, 712 "print hexadecimal representation of network traffic" }, 713 { "prettydump", 714 "output of \"netdata\" to user readable format (debugging)", 715 0, 716 &prettydump, 717 "print user readable output for \"netdata\"" }, 718 { "options", 719 "viewing of options processing (debugging)", 720 0, 721 &showoptions, 722 "show option processing" }, 723 #if defined(unix) 724 { "termdata", 725 "(debugging) toggle printing of hexadecimal terminal data", 726 0, 727 &termdata, 728 "print hexadecimal representation of terminal traffic" }, 729 #endif /* defined(unix) */ 730 { "?", 731 0, 732 togglehelp }, 733 { "help", 734 0, 735 togglehelp }, 736 { 0 } 737 }; 738 739 static int 740 togglehelp() 741 { 742 struct togglelist *c; 743 744 for (c = Togglelist; c->name; c++) { 745 if (c->help) { 746 if (*c->help) 747 printf("%-15s toggle %s\n", c->name, c->help); 748 else 749 printf("\n"); 750 } 751 } 752 printf("\n"); 753 printf("%-15s %s\n", "?", "display help information"); 754 return 0; 755 } 756 757 static void 758 settogglehelp(set) 759 int set; 760 { 761 struct togglelist *c; 762 763 for (c = Togglelist; c->name; c++) { 764 if (c->help) { 765 if (*c->help) 766 printf("%-15s %s %s\n", c->name, set ? "enable" : "disable", 767 c->help); 768 else 769 printf("\n"); 770 } 771 } 772 } 773 774 #define GETTOGGLE(name) (struct togglelist *) \ 775 genget(name, (char **) Togglelist, sizeof(struct togglelist)) 776 777 static int 778 toggle(argc, argv) 779 int argc; 780 char *argv[]; 781 { 782 int retval = 1; 783 char *name; 784 struct togglelist *c; 785 786 if (argc < 2) { 787 fprintf(stderr, 788 "Need an argument to 'toggle' command. 'toggle ?' for help.\n"); 789 return 0; 790 } 791 argc--; 792 argv++; 793 while (argc--) { 794 name = *argv++; 795 c = GETTOGGLE(name); 796 if (Ambiguous(c)) { 797 fprintf(stderr, "'%s': ambiguous argument ('toggle ?' for help).\n", 798 name); 799 return 0; 800 } else if (c == 0) { 801 fprintf(stderr, "'%s': unknown argument ('toggle ?' for help).\n", 802 name); 803 return 0; 804 } else { 805 if (c->variable) { 806 *c->variable = !*c->variable; /* invert it */ 807 if (c->actionexplanation) { 808 printf("%s %s.\n", *c->variable? "Will" : "Won't", 809 c->actionexplanation); 810 } 811 } 812 if (c->handler) { 813 retval &= (*c->handler)(-1); 814 } 815 } 816 } 817 return retval; 818 } 819 820 /* 821 * The following perform the "set" command. 822 */ 823 824 #ifdef USE_TERMIO 825 struct termio new_tc = { 0 }; 826 #endif 827 828 struct setlist { 829 char *name; /* name */ 830 char *help; /* help information */ 831 void (*handler)(); 832 cc_t *charp; /* where it is located at */ 833 }; 834 835 static struct setlist Setlist[] = { 836 #ifdef KLUDGELINEMODE 837 { "echo", "character to toggle local echoing on/off", 0, &echoc }, 838 #endif 839 { "escape", "character to escape back to telnet command mode", 0, &escape }, 840 { "rlogin", "rlogin escape character", 0, &rlogin }, 841 { "tracefile", "file to write trace information to", SetNetTrace, (cc_t *)NetTraceFile}, 842 { " ", "" }, 843 { " ", "The following need 'localchars' to be toggled true", 0, 0 }, 844 { "flushoutput", "character to cause an Abort Output", 0, termFlushCharp }, 845 { "interrupt", "character to cause an Interrupt Process", 0, termIntCharp }, 846 { "quit", "character to cause an Abort process", 0, termQuitCharp }, 847 { "eof", "character to cause an EOF ", 0, termEofCharp }, 848 { " ", "" }, 849 { " ", "The following are for local editing in linemode", 0, 0 }, 850 { "erase", "character to use to erase a character", 0, termEraseCharp }, 851 { "kill", "character to use to erase a line", 0, termKillCharp }, 852 { "lnext", "character to use for literal next", 0, termLiteralNextCharp }, 853 { "susp", "character to cause a Suspend Process", 0, termSuspCharp }, 854 { "reprint", "character to use for line reprint", 0, termRprntCharp }, 855 { "worderase", "character to use to erase a word", 0, termWerasCharp }, 856 { "start", "character to use for XON", 0, termStartCharp }, 857 { "stop", "character to use for XOFF", 0, termStopCharp }, 858 { "forw1", "alternate end of line character", 0, termForw1Charp }, 859 { "forw2", "alternate end of line character", 0, termForw2Charp }, 860 { "ayt", "alternate AYT character", 0, termAytCharp }, 861 { 0 } 862 }; 863 864 #if defined(CRAY) && !defined(__STDC__) 865 /* Work around compiler bug in pcc 4.1.5 */ 866 void 867 _setlist_init() 868 { 869 #ifndef KLUDGELINEMODE 870 #define N 5 871 #else 872 #define N 6 873 #endif 874 Setlist[N+0].charp = &termFlushChar; 875 Setlist[N+1].charp = &termIntChar; 876 Setlist[N+2].charp = &termQuitChar; 877 Setlist[N+3].charp = &termEofChar; 878 Setlist[N+6].charp = &termEraseChar; 879 Setlist[N+7].charp = &termKillChar; 880 Setlist[N+8].charp = &termLiteralNextChar; 881 Setlist[N+9].charp = &termSuspChar; 882 Setlist[N+10].charp = &termRprntChar; 883 Setlist[N+11].charp = &termWerasChar; 884 Setlist[N+12].charp = &termStartChar; 885 Setlist[N+13].charp = &termStopChar; 886 Setlist[N+14].charp = &termForw1Char; 887 Setlist[N+15].charp = &termForw2Char; 888 Setlist[N+16].charp = &termAytChar; 889 #undef N 890 } 891 #endif /* defined(CRAY) && !defined(__STDC__) */ 892 893 static struct setlist * 894 getset(name) 895 char *name; 896 { 897 return (struct setlist *) 898 genget(name, (char **) Setlist, sizeof(struct setlist)); 899 } 900 901 void 902 set_escape_char(s) 903 char *s; 904 { 905 if (rlogin != _POSIX_VDISABLE) { 906 rlogin = (s && *s) ? special(s) : _POSIX_VDISABLE; 907 printf("Telnet rlogin escape character is '%s'.\n", 908 control(rlogin)); 909 } else { 910 escape = (s && *s) ? special(s) : _POSIX_VDISABLE; 911 printf("Telnet escape character is '%s'.\n", control(escape)); 912 } 913 } 914 915 static int 916 setcmd(argc, argv) 917 int argc; 918 char *argv[]; 919 { 920 int value; 921 struct setlist *ct; 922 struct togglelist *c; 923 924 if (argc < 2 || argc > 3) { 925 printf("Format is 'set Name Value'\n'set ?' for help.\n"); 926 return 0; 927 } 928 if ((argc == 2) && (isprefix(argv[1], "?") || isprefix(argv[1], "help"))) { 929 for (ct = Setlist; ct->name; ct++) 930 printf("%-15s %s\n", ct->name, ct->help); 931 printf("\n"); 932 settogglehelp(1); 933 printf("%-15s %s\n", "?", "display help information"); 934 return 0; 935 } 936 937 ct = getset(argv[1]); 938 if (ct == 0) { 939 c = GETTOGGLE(argv[1]); 940 if (c == 0) { 941 fprintf(stderr, "'%s': unknown argument ('set ?' for help).\n", 942 argv[1]); 943 return 0; 944 } else if (Ambiguous(c)) { 945 fprintf(stderr, "'%s': ambiguous argument ('set ?' for help).\n", 946 argv[1]); 947 return 0; 948 } 949 if (c->variable) { 950 if ((argc == 2) || (strcmp("on", argv[2]) == 0)) 951 *c->variable = 1; 952 else if (strcmp("off", argv[2]) == 0) 953 *c->variable = 0; 954 else { 955 printf("Format is 'set togglename [on|off]'\n'set ?' for help.\n"); 956 return 0; 957 } 958 if (c->actionexplanation) { 959 printf("%s %s.\n", *c->variable? "Will" : "Won't", 960 c->actionexplanation); 961 } 962 } 963 if (c->handler) 964 (*c->handler)(1); 965 } else if (argc != 3) { 966 printf("Format is 'set Name Value'\n'set ?' for help.\n"); 967 return 0; 968 } else if (Ambiguous(ct)) { 969 fprintf(stderr, "'%s': ambiguous argument ('set ?' for help).\n", 970 argv[1]); 971 return 0; 972 } else if (ct->handler) { 973 (*ct->handler)(argv[2]); 974 printf("%s set to \"%s\".\n", ct->name, (char *)ct->charp); 975 } else { 976 if (strcmp("off", argv[2])) { 977 value = special(argv[2]); 978 } else { 979 value = _POSIX_VDISABLE; 980 } 981 *(ct->charp) = (cc_t)value; 982 printf("%s character is '%s'.\n", ct->name, control(*(ct->charp))); 983 } 984 slc_check(); 985 return 1; 986 } 987 988 static int 989 unsetcmd(argc, argv) 990 int argc; 991 char *argv[]; 992 { 993 struct setlist *ct; 994 struct togglelist *c; 995 register char *name; 996 997 if (argc < 2) { 998 fprintf(stderr, 999 "Need an argument to 'unset' command. 'unset ?' for help.\n"); 1000 return 0; 1001 } 1002 if (isprefix(argv[1], "?") || isprefix(argv[1], "help")) { 1003 for (ct = Setlist; ct->name; ct++) 1004 printf("%-15s %s\n", ct->name, ct->help); 1005 printf("\n"); 1006 settogglehelp(0); 1007 printf("%-15s %s\n", "?", "display help information"); 1008 return 0; 1009 } 1010 1011 argc--; 1012 argv++; 1013 while (argc--) { 1014 name = *argv++; 1015 ct = getset(name); 1016 if (ct == 0) { 1017 c = GETTOGGLE(name); 1018 if (c == 0) { 1019 fprintf(stderr, "'%s': unknown argument ('unset ?' for help).\n", 1020 name); 1021 return 0; 1022 } else if (Ambiguous(c)) { 1023 fprintf(stderr, "'%s': ambiguous argument ('unset ?' for help).\n", 1024 name); 1025 return 0; 1026 } 1027 if (c->variable) { 1028 *c->variable = 0; 1029 if (c->actionexplanation) { 1030 printf("%s %s.\n", *c->variable? "Will" : "Won't", 1031 c->actionexplanation); 1032 } 1033 } 1034 if (c->handler) 1035 (*c->handler)(0); 1036 } else if (Ambiguous(ct)) { 1037 fprintf(stderr, "'%s': ambiguous argument ('unset ?' for help).\n", 1038 name); 1039 return 0; 1040 } else if (ct->handler) { 1041 (*ct->handler)(0); 1042 printf("%s reset to \"%s\".\n", ct->name, (char *)ct->charp); 1043 } else { 1044 *(ct->charp) = _POSIX_VDISABLE; 1045 printf("%s character is '%s'.\n", ct->name, control(*(ct->charp))); 1046 } 1047 } 1048 return 1; 1049 } 1050 1051 /* 1052 * The following are the data structures and routines for the 1053 * 'mode' command. 1054 */ 1055 #ifdef KLUDGELINEMODE 1056 extern int kludgelinemode; 1057 1058 static int 1059 dokludgemode() 1060 { 1061 kludgelinemode = 1; 1062 send_wont(TELOPT_LINEMODE, 1); 1063 send_dont(TELOPT_SGA, 1); 1064 send_dont(TELOPT_ECHO, 1); 1065 } 1066 #endif 1067 1068 static int 1069 dolinemode() 1070 { 1071 #ifdef KLUDGELINEMODE 1072 if (kludgelinemode) 1073 send_dont(TELOPT_SGA, 1); 1074 #endif 1075 send_will(TELOPT_LINEMODE, 1); 1076 send_dont(TELOPT_ECHO, 1); 1077 return 1; 1078 } 1079 1080 static int 1081 docharmode() 1082 { 1083 #ifdef KLUDGELINEMODE 1084 if (kludgelinemode) 1085 send_do(TELOPT_SGA, 1); 1086 else 1087 #endif 1088 send_wont(TELOPT_LINEMODE, 1); 1089 send_do(TELOPT_ECHO, 1); 1090 return 1; 1091 } 1092 1093 static int 1094 dolmmode(bit, on) 1095 int bit, on; 1096 { 1097 unsigned char c; 1098 extern int linemode; 1099 1100 if (my_want_state_is_wont(TELOPT_LINEMODE)) { 1101 printf("?Need to have LINEMODE option enabled first.\n"); 1102 printf("'mode ?' for help.\n"); 1103 return 0; 1104 } 1105 1106 if (on) 1107 c = (linemode | bit); 1108 else 1109 c = (linemode & ~bit); 1110 lm_mode(&c, 1, 1); 1111 return 1; 1112 } 1113 1114 int 1115 setmode(bit) 1116 { 1117 return dolmmode(bit, 1); 1118 } 1119 1120 int 1121 clearmode(bit) 1122 { 1123 return dolmmode(bit, 0); 1124 } 1125 1126 struct modelist { 1127 char *name; /* command name */ 1128 char *help; /* help string */ 1129 int (*handler)(); /* routine which executes command */ 1130 int needconnect; /* Do we need to be connected to execute? */ 1131 int arg1; 1132 }; 1133 1134 extern int modehelp(); 1135 1136 static struct modelist ModeList[] = { 1137 { "character", "Disable LINEMODE option", docharmode, 1 }, 1138 #ifdef KLUDGELINEMODE 1139 { "", "(or disable obsolete line-by-line mode)", 0 }, 1140 #endif 1141 { "line", "Enable LINEMODE option", dolinemode, 1 }, 1142 #ifdef KLUDGELINEMODE 1143 { "", "(or enable obsolete line-by-line mode)", 0 }, 1144 #endif 1145 { "", "", 0 }, 1146 { "", "These require the LINEMODE option to be enabled", 0 }, 1147 { "isig", "Enable signal trapping", setmode, 1, MODE_TRAPSIG }, 1148 { "+isig", 0, setmode, 1, MODE_TRAPSIG }, 1149 { "-isig", "Disable signal trapping", clearmode, 1, MODE_TRAPSIG }, 1150 { "edit", "Enable character editing", setmode, 1, MODE_EDIT }, 1151 { "+edit", 0, setmode, 1, MODE_EDIT }, 1152 { "-edit", "Disable character editing", clearmode, 1, MODE_EDIT }, 1153 { "softtabs", "Enable tab expansion", setmode, 1, MODE_SOFT_TAB }, 1154 { "+softtabs", 0, setmode, 1, MODE_SOFT_TAB }, 1155 { "-softtabs", "Disable character editing", clearmode, 1, MODE_SOFT_TAB }, 1156 { "litecho", "Enable literal character echo", setmode, 1, MODE_LIT_ECHO }, 1157 { "+litecho", 0, setmode, 1, MODE_LIT_ECHO }, 1158 { "-litecho", "Disable literal character echo", clearmode, 1, MODE_LIT_ECHO }, 1159 { "help", 0, modehelp, 0 }, 1160 #ifdef KLUDGELINEMODE 1161 { "kludgeline", 0, dokludgemode, 1 }, 1162 #endif 1163 { "", "", 0 }, 1164 { "?", "Print help information", modehelp, 0 }, 1165 { 0 }, 1166 }; 1167 1168 1169 int 1170 modehelp() 1171 { 1172 struct modelist *mt; 1173 1174 printf("format is: 'mode Mode', where 'Mode' is one of:\n\n"); 1175 for (mt = ModeList; mt->name; mt++) { 1176 if (mt->help) { 1177 if (*mt->help) 1178 printf("%-15s %s\n", mt->name, mt->help); 1179 else 1180 printf("\n"); 1181 } 1182 } 1183 return 0; 1184 } 1185 1186 #define GETMODECMD(name) (struct modelist *) \ 1187 genget(name, (char **) ModeList, sizeof(struct modelist)) 1188 1189 static int 1190 modecmd(argc, argv) 1191 int argc; 1192 char *argv[]; 1193 { 1194 struct modelist *mt; 1195 1196 if (argc != 2) { 1197 printf("'mode' command requires an argument\n"); 1198 printf("'mode ?' for help.\n"); 1199 } else if ((mt = GETMODECMD(argv[1])) == 0) { 1200 fprintf(stderr, "Unknown mode '%s' ('mode ?' for help).\n", argv[1]); 1201 } else if (Ambiguous(mt)) { 1202 fprintf(stderr, "Ambiguous mode '%s' ('mode ?' for help).\n", argv[1]); 1203 } else if (mt->needconnect && !connected) { 1204 printf("?Need to be connected first.\n"); 1205 printf("'mode ?' for help.\n"); 1206 } else if (mt->handler) { 1207 return (*mt->handler)(mt->arg1); 1208 } 1209 return 0; 1210 } 1211 1212 /* 1213 * The following data structures and routines implement the 1214 * "display" command. 1215 */ 1216 1217 static int 1218 display(argc, argv) 1219 int argc; 1220 char *argv[]; 1221 { 1222 struct togglelist *tl; 1223 struct setlist *sl; 1224 1225 #define dotog(tl) if (tl->variable && tl->actionexplanation) { \ 1226 if (*tl->variable) { \ 1227 printf("will"); \ 1228 } else { \ 1229 printf("won't"); \ 1230 } \ 1231 printf(" %s.\n", tl->actionexplanation); \ 1232 } 1233 1234 #define doset(sl) if (sl->name && *sl->name != ' ') { \ 1235 if (sl->handler == 0) \ 1236 printf("%-15s [%s]\n", sl->name, control(*sl->charp)); \ 1237 else \ 1238 printf("%-15s \"%s\"\n", sl->name, (char *)sl->charp); \ 1239 } 1240 1241 if (argc == 1) { 1242 for (tl = Togglelist; tl->name; tl++) { 1243 dotog(tl); 1244 } 1245 printf("\n"); 1246 for (sl = Setlist; sl->name; sl++) { 1247 doset(sl); 1248 } 1249 } else { 1250 int i; 1251 1252 for (i = 1; i < argc; i++) { 1253 sl = getset(argv[i]); 1254 tl = GETTOGGLE(argv[i]); 1255 if (Ambiguous(sl) || Ambiguous(tl)) { 1256 printf("?Ambiguous argument '%s'.\n", argv[i]); 1257 return 0; 1258 } else if (!sl && !tl) { 1259 printf("?Unknown argument '%s'.\n", argv[i]); 1260 return 0; 1261 } else { 1262 if (tl) { 1263 dotog(tl); 1264 } 1265 if (sl) { 1266 doset(sl); 1267 } 1268 } 1269 } 1270 } 1271 /*@*/optionstatus(); 1272 return 1; 1273 #undef doset 1274 #undef dotog 1275 } 1276 1277 /* 1278 * The following are the data structures, and many of the routines, 1279 * relating to command processing. 1280 */ 1281 1282 /* 1283 * Set the escape character. 1284 */ 1285 static int 1286 setescape(argc, argv) 1287 int argc; 1288 char *argv[]; 1289 { 1290 register char *arg; 1291 char buf[50]; 1292 1293 printf( 1294 "Deprecated usage - please use 'set escape%s%s' in the future.\n", 1295 (argc > 2)? " ":"", (argc > 2)? argv[1]: ""); 1296 if (argc > 2) 1297 arg = argv[1]; 1298 else { 1299 printf("new escape character: "); 1300 (void) fgets(buf, sizeof(buf), stdin); 1301 arg = buf; 1302 } 1303 if (arg[0] != '\0') 1304 escape = arg[0]; 1305 if (!In3270) { 1306 printf("Escape character is '%s'.\n", control(escape)); 1307 } 1308 (void) fflush(stdout); 1309 return 1; 1310 } 1311 1312 /*VARARGS*/ 1313 static int 1314 togcrmod() 1315 { 1316 crmod = !crmod; 1317 printf("Deprecated usage - please use 'toggle crmod' in the future.\n"); 1318 printf("%s map carriage return on output.\n", crmod ? "Will" : "Won't"); 1319 (void) fflush(stdout); 1320 return 1; 1321 } 1322 1323 /*VARARGS*/ 1324 int 1325 suspend() 1326 { 1327 #ifdef SIGTSTP 1328 setcommandmode(); 1329 { 1330 long oldrows, oldcols, newrows, newcols, err; 1331 1332 err = (TerminalWindowSize(&oldrows, &oldcols) == 0) ? 1 : 0; 1333 (void) kill(0, SIGTSTP); 1334 /* 1335 * If we didn't get the window size before the SUSPEND, but we 1336 * can get them now (???), then send the NAWS to make sure that 1337 * we are set up for the right window size. 1338 */ 1339 if (TerminalWindowSize(&newrows, &newcols) && connected && 1340 (err || ((oldrows != newrows) || (oldcols != newcols)))) { 1341 sendnaws(); 1342 } 1343 } 1344 /* reget parameters in case they were changed */ 1345 TerminalSaveState(); 1346 setconnmode(0); 1347 #else 1348 printf("Suspend is not supported. Try the '!' command instead\n"); 1349 #endif 1350 return 1; 1351 } 1352 1353 #if !defined(TN3270) 1354 /*ARGSUSED*/ 1355 int 1356 shell(argc, argv) 1357 int argc; 1358 char *argv[]; 1359 { 1360 long oldrows, oldcols, newrows, newcols, err; 1361 1362 setcommandmode(); 1363 1364 err = (TerminalWindowSize(&oldrows, &oldcols) == 0) ? 1 : 0; 1365 switch(vfork()) { 1366 case -1: 1367 perror("Fork failed\n"); 1368 break; 1369 1370 case 0: 1371 { 1372 /* 1373 * Fire up the shell in the child. 1374 */ 1375 register char *shellp, *shellname; 1376 extern char *rindex(); 1377 1378 shellp = getenv("SHELL"); 1379 if (shellp == NULL) 1380 shellp = "/bin/sh"; 1381 if ((shellname = rindex(shellp, '/')) == 0) 1382 shellname = shellp; 1383 else 1384 shellname++; 1385 if (argc > 1) 1386 execl(shellp, shellname, "-c", &saveline[1], 0); 1387 else 1388 execl(shellp, shellname, 0); 1389 perror("Execl"); 1390 _exit(1); 1391 } 1392 default: 1393 (void)wait((int *)0); /* Wait for the shell to complete */ 1394 1395 if (TerminalWindowSize(&newrows, &newcols) && connected && 1396 (err || ((oldrows != newrows) || (oldcols != newcols)))) { 1397 sendnaws(); 1398 } 1399 break; 1400 } 1401 return 1; 1402 } 1403 #else /* !defined(TN3270) */ 1404 extern int shell(); 1405 #endif /* !defined(TN3270) */ 1406 1407 /*VARARGS*/ 1408 static 1409 bye(argc, argv) 1410 int argc; /* Number of arguments */ 1411 char *argv[]; /* arguments */ 1412 { 1413 extern int resettermname; 1414 1415 if (connected) { 1416 (void) shutdown(net, 2); 1417 printf("Connection closed.\n"); 1418 (void) NetClose(net); 1419 connected = 0; 1420 resettermname = 1; 1421 #if defined(AUTHENTICATION) 1422 auth_encrypt_connect(connected); 1423 #endif /* defined(AUTHENTICATION) */ 1424 /* reset options */ 1425 tninit(); 1426 #if defined(TN3270) 1427 SetIn3270(); /* Get out of 3270 mode */ 1428 #endif /* defined(TN3270) */ 1429 } 1430 if ((argc != 2) || (strcmp(argv[1], "fromquit") != 0)) { 1431 longjmp(toplevel, 1); 1432 /* NOTREACHED */ 1433 } 1434 return 1; /* Keep lint, etc., happy */ 1435 } 1436 1437 /*VARARGS*/ 1438 quit() 1439 { 1440 (void) call(bye, "bye", "fromquit", 0); 1441 Exit(0); 1442 /*NOTREACHED*/ 1443 } 1444 1445 /*VARARGS*/ 1446 int 1447 logout() 1448 { 1449 send_do(TELOPT_LOGOUT, 1); 1450 (void) netflush(); 1451 return 1; 1452 } 1453 1454 1455 /* 1456 * The SLC command. 1457 */ 1458 1459 struct slclist { 1460 char *name; 1461 char *help; 1462 void (*handler)(); 1463 int arg; 1464 }; 1465 1466 static void slc_help(); 1467 1468 struct slclist SlcList[] = { 1469 { "export", "Use local special character definitions", 1470 slc_mode_export, 0 }, 1471 { "import", "Use remote special character definitions", 1472 slc_mode_import, 1 }, 1473 { "check", "Verify remote special character definitions", 1474 slc_mode_import, 0 }, 1475 { "help", 0, slc_help, 0 }, 1476 { "?", "Print help information", slc_help, 0 }, 1477 { 0 }, 1478 }; 1479 1480 static void 1481 slc_help() 1482 { 1483 struct slclist *c; 1484 1485 for (c = SlcList; c->name; c++) { 1486 if (c->help) { 1487 if (*c->help) 1488 printf("%-15s %s\n", c->name, c->help); 1489 else 1490 printf("\n"); 1491 } 1492 } 1493 } 1494 1495 static struct slclist * 1496 getslc(name) 1497 char *name; 1498 { 1499 return (struct slclist *) 1500 genget(name, (char **) SlcList, sizeof(struct slclist)); 1501 } 1502 1503 static 1504 slccmd(argc, argv) 1505 int argc; 1506 char *argv[]; 1507 { 1508 struct slclist *c; 1509 1510 if (argc != 2) { 1511 fprintf(stderr, 1512 "Need an argument to 'slc' command. 'slc ?' for help.\n"); 1513 return 0; 1514 } 1515 c = getslc(argv[1]); 1516 if (c == 0) { 1517 fprintf(stderr, "'%s': unknown argument ('slc ?' for help).\n", 1518 argv[1]); 1519 return 0; 1520 } 1521 if (Ambiguous(c)) { 1522 fprintf(stderr, "'%s': ambiguous argument ('slc ?' for help).\n", 1523 argv[1]); 1524 return 0; 1525 } 1526 (*c->handler)(c->arg); 1527 slcstate(); 1528 return 1; 1529 } 1530 1531 /* 1532 * The ENVIRON command. 1533 */ 1534 1535 struct envlist { 1536 char *name; 1537 char *help; 1538 void (*handler)(); 1539 int narg; 1540 }; 1541 1542 extern struct env_lst * 1543 env_define P((unsigned char *, unsigned char *)); 1544 extern void 1545 env_undefine P((unsigned char *)), 1546 env_export P((unsigned char *)), 1547 env_unexport P((unsigned char *)), 1548 env_send P((unsigned char *)), 1549 #if defined(OLD_ENVIRON) && defined(ENV_HACK) 1550 env_varval P((unsigned char *)), 1551 #endif 1552 env_list P((void)); 1553 static void 1554 env_help P((void)); 1555 1556 struct envlist EnvList[] = { 1557 { "define", "Define an environment variable", 1558 (void (*)())env_define, 2 }, 1559 { "undefine", "Undefine an environment variable", 1560 env_undefine, 1 }, 1561 { "export", "Mark an environment variable for automatic export", 1562 env_export, 1 }, 1563 { "unexport", "Don't mark an environment variable for automatic export", 1564 env_unexport, 1 }, 1565 { "send", "Send an environment variable", env_send, 1 }, 1566 { "list", "List the current environment variables", 1567 env_list, 0 }, 1568 #if defined(OLD_ENVIRON) && defined(ENV_HACK) 1569 { "varval", "Reverse VAR and VALUE (auto, right, wrong, status)", 1570 env_varval, 1 }, 1571 #endif 1572 { "help", 0, env_help, 0 }, 1573 { "?", "Print help information", env_help, 0 }, 1574 { 0 }, 1575 }; 1576 1577 static void 1578 env_help() 1579 { 1580 struct envlist *c; 1581 1582 for (c = EnvList; c->name; c++) { 1583 if (c->help) { 1584 if (*c->help) 1585 printf("%-15s %s\n", c->name, c->help); 1586 else 1587 printf("\n"); 1588 } 1589 } 1590 } 1591 1592 static struct envlist * 1593 getenvcmd(name) 1594 char *name; 1595 { 1596 return (struct envlist *) 1597 genget(name, (char **) EnvList, sizeof(struct envlist)); 1598 } 1599 1600 env_cmd(argc, argv) 1601 int argc; 1602 char *argv[]; 1603 { 1604 struct envlist *c; 1605 1606 if (argc < 2) { 1607 fprintf(stderr, 1608 "Need an argument to 'environ' command. 'environ ?' for help.\n"); 1609 return 0; 1610 } 1611 c = getenvcmd(argv[1]); 1612 if (c == 0) { 1613 fprintf(stderr, "'%s': unknown argument ('environ ?' for help).\n", 1614 argv[1]); 1615 return 0; 1616 } 1617 if (Ambiguous(c)) { 1618 fprintf(stderr, "'%s': ambiguous argument ('environ ?' for help).\n", 1619 argv[1]); 1620 return 0; 1621 } 1622 if (c->narg + 2 != argc) { 1623 fprintf(stderr, 1624 "Need %s%d argument%s to 'environ %s' command. 'environ ?' for help.\n", 1625 c->narg < argc + 2 ? "only " : "", 1626 c->narg, c->narg == 1 ? "" : "s", c->name); 1627 return 0; 1628 } 1629 (*c->handler)(argv[2], argv[3]); 1630 return 1; 1631 } 1632 1633 struct env_lst { 1634 struct env_lst *next; /* pointer to next structure */ 1635 struct env_lst *prev; /* pointer to previous structure */ 1636 unsigned char *var; /* pointer to variable name */ 1637 unsigned char *value; /* pointer to variable value */ 1638 int export; /* 1 -> export with default list of variables */ 1639 int welldefined; /* A well defined variable */ 1640 }; 1641 1642 struct env_lst envlisthead; 1643 1644 struct env_lst * 1645 env_find(var) 1646 unsigned char *var; 1647 { 1648 register struct env_lst *ep; 1649 1650 for (ep = envlisthead.next; ep; ep = ep->next) { 1651 if (strcmp((char *)ep->var, (char *)var) == 0) 1652 return(ep); 1653 } 1654 return(NULL); 1655 } 1656 1657 void 1658 env_init() 1659 { 1660 extern char **environ; 1661 register char **epp, *cp; 1662 register struct env_lst *ep; 1663 extern char *index(); 1664 1665 for (epp = environ; *epp; epp++) { 1666 if (cp = index(*epp, '=')) { 1667 *cp = '\0'; 1668 ep = env_define((unsigned char *)*epp, 1669 (unsigned char *)cp+1); 1670 ep->export = 0; 1671 *cp = '='; 1672 } 1673 } 1674 /* 1675 * Special case for DISPLAY variable. If it is ":0.0" or 1676 * "unix:0.0", we have to get rid of "unix" and insert our 1677 * hostname. 1678 */ 1679 if ((ep = env_find("DISPLAY")) 1680 && ((*ep->value == ':') 1681 || (strncmp((char *)ep->value, "unix:", 5) == 0))) { 1682 char hbuf[256+1]; 1683 char *cp2 = index((char *)ep->value, ':'); 1684 1685 gethostname(hbuf, 256); 1686 hbuf[256] = '\0'; 1687 cp = (char *)malloc(strlen(hbuf) + strlen(cp2) + 1); 1688 sprintf((char *)cp, "%s%s", hbuf, cp2); 1689 free(ep->value); 1690 ep->value = (unsigned char *)cp; 1691 } 1692 /* 1693 * If USER is not defined, but LOGNAME is, then add 1694 * USER with the value from LOGNAME. By default, we 1695 * don't export the USER variable. 1696 */ 1697 if ((env_find("USER") == NULL) && (ep = env_find("LOGNAME"))) { 1698 env_define((unsigned char *)"USER", ep->value); 1699 env_unexport((unsigned char *)"USER"); 1700 } 1701 env_export((unsigned char *)"DISPLAY"); 1702 env_export((unsigned char *)"PRINTER"); 1703 } 1704 1705 struct env_lst * 1706 env_define(var, value) 1707 unsigned char *var, *value; 1708 { 1709 register struct env_lst *ep; 1710 1711 if (ep = env_find(var)) { 1712 if (ep->var) 1713 free(ep->var); 1714 if (ep->value) 1715 free(ep->value); 1716 } else { 1717 ep = (struct env_lst *)malloc(sizeof(struct env_lst)); 1718 ep->next = envlisthead.next; 1719 envlisthead.next = ep; 1720 ep->prev = &envlisthead; 1721 if (ep->next) 1722 ep->next->prev = ep; 1723 } 1724 ep->welldefined = opt_welldefined(var); 1725 ep->export = 1; 1726 ep->var = (unsigned char *)strdup((char *)var); 1727 ep->value = (unsigned char *)strdup((char *)value); 1728 return(ep); 1729 } 1730 1731 void 1732 env_undefine(var) 1733 unsigned char *var; 1734 { 1735 register struct env_lst *ep; 1736 1737 if (ep = env_find(var)) { 1738 ep->prev->next = ep->next; 1739 if (ep->next) 1740 ep->next->prev = ep->prev; 1741 if (ep->var) 1742 free(ep->var); 1743 if (ep->value) 1744 free(ep->value); 1745 free(ep); 1746 } 1747 } 1748 1749 void 1750 env_export(var) 1751 unsigned char *var; 1752 { 1753 register struct env_lst *ep; 1754 1755 if (ep = env_find(var)) 1756 ep->export = 1; 1757 } 1758 1759 void 1760 env_unexport(var) 1761 unsigned char *var; 1762 { 1763 register struct env_lst *ep; 1764 1765 if (ep = env_find(var)) 1766 ep->export = 0; 1767 } 1768 1769 void 1770 env_send(var) 1771 unsigned char *var; 1772 { 1773 register struct env_lst *ep; 1774 1775 if (my_state_is_wont(TELOPT_NEW_ENVIRON) 1776 #ifdef OLD_ENVIRON 1777 && my_state_is_wont(TELOPT_OLD_ENVIRON) 1778 #endif 1779 ) { 1780 fprintf(stderr, 1781 "Cannot send '%s': Telnet ENVIRON option not enabled\n", 1782 var); 1783 return; 1784 } 1785 ep = env_find(var); 1786 if (ep == 0) { 1787 fprintf(stderr, "Cannot send '%s': variable not defined\n", 1788 var); 1789 return; 1790 } 1791 env_opt_start_info(); 1792 env_opt_add(ep->var); 1793 env_opt_end(0); 1794 } 1795 1796 void 1797 env_list() 1798 { 1799 register struct env_lst *ep; 1800 1801 for (ep = envlisthead.next; ep; ep = ep->next) { 1802 printf("%c %-20s %s\n", ep->export ? '*' : ' ', 1803 ep->var, ep->value); 1804 } 1805 } 1806 1807 unsigned char * 1808 env_default(init, welldefined) 1809 int init; 1810 { 1811 static struct env_lst *nep = NULL; 1812 1813 if (init) { 1814 nep = &envlisthead; 1815 return; 1816 } 1817 if (nep) { 1818 while (nep = nep->next) { 1819 if (nep->export && (nep->welldefined == welldefined)) 1820 return(nep->var); 1821 } 1822 } 1823 return(NULL); 1824 } 1825 1826 unsigned char * 1827 env_getvalue(var) 1828 unsigned char *var; 1829 { 1830 register struct env_lst *ep; 1831 1832 if (ep = env_find(var)) 1833 return(ep->value); 1834 return(NULL); 1835 } 1836 1837 #if defined(OLD_ENVIRON) && defined(ENV_HACK) 1838 void 1839 env_varval(what) 1840 unsigned char *what; 1841 { 1842 extern int old_env_var, old_env_value, env_auto; 1843 int len = strlen((char *)what); 1844 1845 if (len == 0) 1846 goto unknown; 1847 1848 if (strncasecmp((char *)what, "status", len) == 0) { 1849 if (env_auto) 1850 printf("%s%s", "VAR and VALUE are/will be ", 1851 "determined automatically\n"); 1852 if (old_env_var == OLD_ENV_VAR) 1853 printf("VAR and VALUE set to correct definitions\n"); 1854 else 1855 printf("VAR and VALUE definitions are reversed\n"); 1856 } else if (strncasecmp((char *)what, "auto", len) == 0) { 1857 env_auto = 1; 1858 old_env_var = OLD_ENV_VALUE; 1859 old_env_value = OLD_ENV_VAR; 1860 } else if (strncasecmp((char *)what, "right", len) == 0) { 1861 env_auto = 0; 1862 old_env_var = OLD_ENV_VAR; 1863 old_env_value = OLD_ENV_VALUE; 1864 } else if (strncasecmp((char *)what, "wrong", len) == 0) { 1865 env_auto = 0; 1866 old_env_var = OLD_ENV_VALUE; 1867 old_env_value = OLD_ENV_VAR; 1868 } else { 1869 unknown: 1870 printf("Unknown \"varval\" command. (\"auto\", \"right\", \"wrong\", \"status\")\n"); 1871 } 1872 } 1873 #endif 1874 1875 #if defined(AUTHENTICATION) 1876 /* 1877 * The AUTHENTICATE command. 1878 */ 1879 1880 struct authlist { 1881 char *name; 1882 char *help; 1883 int (*handler)(); 1884 int narg; 1885 }; 1886 1887 extern int 1888 auth_enable P((int)), 1889 auth_disable P((int)), 1890 auth_status P((void)); 1891 static int 1892 auth_help P((void)); 1893 1894 struct authlist AuthList[] = { 1895 { "status", "Display current status of authentication information", 1896 auth_status, 0 }, 1897 { "disable", "Disable an authentication type ('auth disable ?' for more)", 1898 auth_disable, 1 }, 1899 { "enable", "Enable an authentication type ('auth enable ?' for more)", 1900 auth_enable, 1 }, 1901 { "help", 0, auth_help, 0 }, 1902 { "?", "Print help information", auth_help, 0 }, 1903 { 0 }, 1904 }; 1905 1906 static int 1907 auth_help() 1908 { 1909 struct authlist *c; 1910 1911 for (c = AuthList; c->name; c++) { 1912 if (c->help) { 1913 if (*c->help) 1914 printf("%-15s %s\n", c->name, c->help); 1915 else 1916 printf("\n"); 1917 } 1918 } 1919 return 0; 1920 } 1921 1922 auth_cmd(argc, argv) 1923 int argc; 1924 char *argv[]; 1925 { 1926 struct authlist *c; 1927 1928 c = (struct authlist *) 1929 genget(argv[1], (char **) AuthList, sizeof(struct authlist)); 1930 if (c == 0) { 1931 fprintf(stderr, "'%s': unknown argument ('auth ?' for help).\n", 1932 argv[1]); 1933 return 0; 1934 } 1935 if (Ambiguous(c)) { 1936 fprintf(stderr, "'%s': ambiguous argument ('auth ?' for help).\n", 1937 argv[1]); 1938 return 0; 1939 } 1940 if (c->narg + 2 != argc) { 1941 fprintf(stderr, 1942 "Need %s%d argument%s to 'auth %s' command. 'auth ?' for help.\n", 1943 c->narg < argc + 2 ? "only " : "", 1944 c->narg, c->narg == 1 ? "" : "s", c->name); 1945 return 0; 1946 } 1947 return((*c->handler)(argv[2], argv[3])); 1948 } 1949 #endif 1950 1951 1952 #if defined(unix) && defined(TN3270) 1953 static void 1954 filestuff(fd) 1955 int fd; 1956 { 1957 int res; 1958 1959 #ifdef F_GETOWN 1960 setconnmode(0); 1961 res = fcntl(fd, F_GETOWN, 0); 1962 setcommandmode(); 1963 1964 if (res == -1) { 1965 perror("fcntl"); 1966 return; 1967 } 1968 printf("\tOwner is %d.\n", res); 1969 #endif 1970 1971 setconnmode(0); 1972 res = fcntl(fd, F_GETFL, 0); 1973 setcommandmode(); 1974 1975 if (res == -1) { 1976 perror("fcntl"); 1977 return; 1978 } 1979 #ifdef notdef 1980 printf("\tFlags are 0x%x: %s\n", res, decodeflags(res)); 1981 #endif 1982 } 1983 #endif /* defined(unix) && defined(TN3270) */ 1984 1985 /* 1986 * Print status about the connection. 1987 */ 1988 /*ARGSUSED*/ 1989 static 1990 status(argc, argv) 1991 int argc; 1992 char *argv[]; 1993 { 1994 if (connected) { 1995 printf("Connected to %s.\n", hostname); 1996 if ((argc < 2) || strcmp(argv[1], "notmuch")) { 1997 int mode = getconnmode(); 1998 1999 if (my_want_state_is_will(TELOPT_LINEMODE)) { 2000 printf("Operating with LINEMODE option\n"); 2001 printf("%s line editing\n", (mode&MODE_EDIT) ? "Local" : "No"); 2002 printf("%s catching of signals\n", 2003 (mode&MODE_TRAPSIG) ? "Local" : "No"); 2004 slcstate(); 2005 #ifdef KLUDGELINEMODE 2006 } else if (kludgelinemode && my_want_state_is_dont(TELOPT_SGA)) { 2007 printf("Operating in obsolete linemode\n"); 2008 #endif 2009 } else { 2010 printf("Operating in single character mode\n"); 2011 if (localchars) 2012 printf("Catching signals locally\n"); 2013 } 2014 printf("%s character echo\n", (mode&MODE_ECHO) ? "Local" : "Remote"); 2015 if (my_want_state_is_will(TELOPT_LFLOW)) 2016 printf("%s flow control\n", (mode&MODE_FLOW) ? "Local" : "No"); 2017 } 2018 } else { 2019 printf("No connection.\n"); 2020 } 2021 # if !defined(TN3270) 2022 printf("Escape character is '%s'.\n", control(escape)); 2023 (void) fflush(stdout); 2024 # else /* !defined(TN3270) */ 2025 if ((!In3270) && ((argc < 2) || strcmp(argv[1], "notmuch"))) { 2026 printf("Escape character is '%s'.\n", control(escape)); 2027 } 2028 # if defined(unix) 2029 if ((argc >= 2) && !strcmp(argv[1], "everything")) { 2030 printf("SIGIO received %d time%s.\n", 2031 sigiocount, (sigiocount == 1)? "":"s"); 2032 if (In3270) { 2033 printf("Process ID %d, process group %d.\n", 2034 getpid(), getpgrp(getpid())); 2035 printf("Terminal input:\n"); 2036 filestuff(tin); 2037 printf("Terminal output:\n"); 2038 filestuff(tout); 2039 printf("Network socket:\n"); 2040 filestuff(net); 2041 } 2042 } 2043 if (In3270 && transcom) { 2044 printf("Transparent mode command is '%s'.\n", transcom); 2045 } 2046 # endif /* defined(unix) */ 2047 (void) fflush(stdout); 2048 if (In3270) { 2049 return 0; 2050 } 2051 # endif /* defined(TN3270) */ 2052 return 1; 2053 } 2054 2055 #ifdef SIGINFO 2056 /* 2057 * Function that gets called when SIGINFO is received. 2058 */ 2059 ayt_status() 2060 { 2061 (void) call(status, "status", "notmuch", 0); 2062 } 2063 #endif 2064 2065 unsigned long inet_addr(); 2066 2067 int 2068 tn(argc, argv) 2069 int argc; 2070 char *argv[]; 2071 { 2072 register struct hostent *host = 0; 2073 struct sockaddr_in sin; 2074 struct servent *sp = 0; 2075 unsigned long temp; 2076 extern char *inet_ntoa(); 2077 #if defined(IP_OPTIONS) && defined(IPPROTO_IP) 2078 char *srp = 0, *strrchr(); 2079 unsigned long sourceroute(), srlen; 2080 #endif 2081 char *cmd, *hostp = 0, *portp = 0, *user = 0; 2082 2083 /* clear the socket address prior to use */ 2084 bzero((char *)&sin, sizeof(sin)); 2085 2086 if (connected) { 2087 printf("?Already connected to %s\n", hostname); 2088 setuid(getuid()); 2089 return 0; 2090 } 2091 if (argc < 2) { 2092 (void) strcpy(line, "open "); 2093 printf("(to) "); 2094 (void) fgets(&line[strlen(line)], sizeof(line) - strlen(line), stdin); 2095 makeargv(); 2096 argc = margc; 2097 argv = margv; 2098 } 2099 cmd = *argv; 2100 --argc; ++argv; 2101 while (argc) { 2102 if (isprefix(*argv, "help") || isprefix(*argv, "?")) 2103 goto usage; 2104 if (strcmp(*argv, "-l") == 0) { 2105 --argc; ++argv; 2106 if (argc == 0) 2107 goto usage; 2108 user = *argv++; 2109 --argc; 2110 continue; 2111 } 2112 if (strcmp(*argv, "-a") == 0) { 2113 --argc; ++argv; 2114 autologin = 1; 2115 continue; 2116 } 2117 if (hostp == 0) { 2118 hostp = *argv++; 2119 --argc; 2120 continue; 2121 } 2122 if (portp == 0) { 2123 portp = *argv++; 2124 --argc; 2125 continue; 2126 } 2127 usage: 2128 printf("usage: %s [-l user] [-a] host-name [port]\n", cmd); 2129 setuid(getuid()); 2130 return 0; 2131 } 2132 if (hostp == 0) 2133 goto usage; 2134 2135 #if defined(IP_OPTIONS) && defined(IPPROTO_IP) 2136 if (hostp[0] == '@' || hostp[0] == '!') { 2137 if ((hostname = strrchr(hostp, ':')) == NULL) 2138 hostname = strrchr(hostp, '@'); 2139 hostname++; 2140 srp = 0; 2141 temp = sourceroute(hostp, &srp, &srlen); 2142 if (temp == 0) { 2143 herror(srp); 2144 setuid(getuid()); 2145 return 0; 2146 } else if (temp == -1) { 2147 printf("Bad source route option: %s\n", hostp); 2148 setuid(getuid()); 2149 return 0; 2150 } else { 2151 sin.sin_addr.s_addr = temp; 2152 sin.sin_family = AF_INET; 2153 } 2154 } else { 2155 #endif 2156 temp = inet_addr(hostp); 2157 if (temp != (unsigned long) -1) { 2158 sin.sin_addr.s_addr = temp; 2159 sin.sin_family = AF_INET; 2160 (void) strcpy(_hostname, hostp); 2161 hostname = _hostname; 2162 } else { 2163 host = gethostbyname(hostp); 2164 if (host) { 2165 sin.sin_family = host->h_addrtype; 2166 #if defined(h_addr) /* In 4.3, this is a #define */ 2167 memcpy((caddr_t)&sin.sin_addr, 2168 host->h_addr_list[0], host->h_length); 2169 #else /* defined(h_addr) */ 2170 memcpy((caddr_t)&sin.sin_addr, host->h_addr, host->h_length); 2171 #endif /* defined(h_addr) */ 2172 strncpy(_hostname, host->h_name, sizeof(_hostname)); 2173 _hostname[sizeof(_hostname)-1] = '\0'; 2174 hostname = _hostname; 2175 } else { 2176 herror(hostp); 2177 setuid(getuid()); 2178 return 0; 2179 } 2180 } 2181 #if defined(IP_OPTIONS) && defined(IPPROTO_IP) 2182 } 2183 #endif 2184 if (portp) { 2185 if (*portp == '-') { 2186 portp++; 2187 telnetport = 1; 2188 } else 2189 telnetport = 0; 2190 sin.sin_port = atoi(portp); 2191 if (sin.sin_port == 0) { 2192 sp = getservbyname(portp, "tcp"); 2193 if (sp) 2194 sin.sin_port = sp->s_port; 2195 else { 2196 printf("%s: bad port number\n", portp); 2197 setuid(getuid()); 2198 return 0; 2199 } 2200 } else { 2201 #if !defined(htons) 2202 u_short htons P((unsigned short)); 2203 #endif /* !defined(htons) */ 2204 sin.sin_port = htons(sin.sin_port); 2205 } 2206 } else { 2207 if (sp == 0) { 2208 sp = getservbyname("telnet", "tcp"); 2209 if (sp == 0) { 2210 fprintf(stderr, "telnet: tcp/telnet: unknown service\n"); 2211 setuid(getuid()); 2212 return 0; 2213 } 2214 sin.sin_port = sp->s_port; 2215 } 2216 telnetport = 1; 2217 } 2218 printf("Trying %s...\n", inet_ntoa(sin.sin_addr)); 2219 do { 2220 net = socket(AF_INET, SOCK_STREAM, 0); 2221 setuid(getuid()); 2222 if (net < 0) { 2223 perror("telnet: socket"); 2224 return 0; 2225 } 2226 #if defined(IP_OPTIONS) && defined(IPPROTO_IP) 2227 if (srp && setsockopt(net, IPPROTO_IP, IP_OPTIONS, (char *)srp, srlen) < 0) 2228 perror("setsockopt (IP_OPTIONS)"); 2229 #endif 2230 #if defined(IPPROTO_IP) && defined(IP_TOS) 2231 { 2232 # if defined(HAS_GETTOS) 2233 struct tosent *tp; 2234 if (tos < 0 && (tp = gettosbyname("telnet", "tcp"))) 2235 tos = tp->t_tos; 2236 # endif 2237 if (tos < 0) 2238 tos = IPTOS_LOWDELAY; 2239 if (tos 2240 && (setsockopt(net, IPPROTO_IP, IP_TOS, 2241 (char *)&tos, sizeof(int)) < 0) 2242 && (errno != ENOPROTOOPT)) 2243 perror("telnet: setsockopt (IP_TOS) (ignored)"); 2244 } 2245 #endif /* defined(IPPROTO_IP) && defined(IP_TOS) */ 2246 2247 if (debug && SetSockOpt(net, SOL_SOCKET, SO_DEBUG, 1) < 0) { 2248 perror("setsockopt (SO_DEBUG)"); 2249 } 2250 2251 if (connect(net, (struct sockaddr *)&sin, sizeof (sin)) < 0) { 2252 #if defined(h_addr) /* In 4.3, this is a #define */ 2253 if (host && host->h_addr_list[1]) { 2254 int oerrno = errno; 2255 2256 fprintf(stderr, "telnet: connect to address %s: ", 2257 inet_ntoa(sin.sin_addr)); 2258 errno = oerrno; 2259 perror((char *)0); 2260 host->h_addr_list++; 2261 memcpy((caddr_t)&sin.sin_addr, 2262 host->h_addr_list[0], host->h_length); 2263 (void) NetClose(net); 2264 continue; 2265 } 2266 #endif /* defined(h_addr) */ 2267 perror("telnet: Unable to connect to remote host"); 2268 return 0; 2269 } 2270 connected++; 2271 #if defined(AUTHENTICATION) 2272 auth_encrypt_connect(connected); 2273 #endif /* defined(AUTHENTICATION) */ 2274 } while (connected == 0); 2275 cmdrc(hostp, hostname); 2276 if (autologin && user == NULL) { 2277 struct passwd *pw; 2278 2279 user = getenv("USER"); 2280 if (user == NULL || 2281 (pw = getpwnam(user)) && pw->pw_uid != getuid()) { 2282 if (pw = getpwuid(getuid())) 2283 user = pw->pw_name; 2284 else 2285 user = NULL; 2286 } 2287 } 2288 if (user) { 2289 env_define((unsigned char *)"USER", (unsigned char *)user); 2290 env_export((unsigned char *)"USER"); 2291 } 2292 (void) call(status, "status", "notmuch", 0); 2293 if (setjmp(peerdied) == 0) 2294 telnet(user); 2295 (void) NetClose(net); 2296 ExitString("Connection closed by foreign host.\n",1); 2297 /*NOTREACHED*/ 2298 } 2299 2300 #define HELPINDENT (sizeof ("connect")) 2301 2302 static char 2303 openhelp[] = "connect to a site", 2304 closehelp[] = "close current connection", 2305 logouthelp[] = "forcibly logout remote user and close the connection", 2306 quithelp[] = "exit telnet", 2307 statushelp[] = "print status information", 2308 helphelp[] = "print help information", 2309 sendhelp[] = "transmit special characters ('send ?' for more)", 2310 sethelp[] = "set operating parameters ('set ?' for more)", 2311 unsethelp[] = "unset operating parameters ('unset ?' for more)", 2312 togglestring[] ="toggle operating parameters ('toggle ?' for more)", 2313 slchelp[] = "change state of special charaters ('slc ?' for more)", 2314 displayhelp[] = "display operating parameters", 2315 #if defined(TN3270) && defined(unix) 2316 transcomhelp[] = "specify Unix command for transparent mode pipe", 2317 #endif /* defined(TN3270) && defined(unix) */ 2318 #if defined(AUTHENTICATION) 2319 authhelp[] = "turn on (off) authentication ('auth ?' for more)", 2320 #endif 2321 #if defined(unix) 2322 zhelp[] = "suspend telnet", 2323 #endif /* defined(unix) */ 2324 shellhelp[] = "invoke a subshell", 2325 envhelp[] = "change environment variables ('environ ?' for more)", 2326 modestring[] = "try to enter line or character mode ('mode ?' for more)"; 2327 2328 static int help(); 2329 2330 static Command cmdtab[] = { 2331 { "close", closehelp, bye, 1 }, 2332 { "logout", logouthelp, logout, 1 }, 2333 { "display", displayhelp, display, 0 }, 2334 { "mode", modestring, modecmd, 0 }, 2335 { "open", openhelp, tn, 0 }, 2336 { "quit", quithelp, quit, 0 }, 2337 { "send", sendhelp, sendcmd, 0 }, 2338 { "set", sethelp, setcmd, 0 }, 2339 { "unset", unsethelp, unsetcmd, 0 }, 2340 { "status", statushelp, status, 0 }, 2341 { "toggle", togglestring, toggle, 0 }, 2342 { "slc", slchelp, slccmd, 0 }, 2343 #if defined(TN3270) && defined(unix) 2344 { "transcom", transcomhelp, settranscom, 0 }, 2345 #endif /* defined(TN3270) && defined(unix) */ 2346 #if defined(AUTHENTICATION) 2347 { "auth", authhelp, auth_cmd, 0 }, 2348 #endif 2349 #if defined(unix) 2350 { "z", zhelp, suspend, 0 }, 2351 #endif /* defined(unix) */ 2352 #if defined(TN3270) 2353 { "!", shellhelp, shell, 1 }, 2354 #else 2355 { "!", shellhelp, shell, 0 }, 2356 #endif 2357 { "environ", envhelp, env_cmd, 0 }, 2358 { "?", helphelp, help, 0 }, 2359 0 2360 }; 2361 2362 static char crmodhelp[] = "deprecated command -- use 'toggle crmod' instead"; 2363 static char escapehelp[] = "deprecated command -- use 'set escape' instead"; 2364 2365 static Command cmdtab2[] = { 2366 { "help", 0, help, 0 }, 2367 { "escape", escapehelp, setescape, 0 }, 2368 { "crmod", crmodhelp, togcrmod, 0 }, 2369 0 2370 }; 2371 2372 2373 /* 2374 * Call routine with argc, argv set from args (terminated by 0). 2375 */ 2376 2377 /*VARARGS1*/ 2378 static 2379 call(va_alist) 2380 va_dcl 2381 { 2382 va_list ap; 2383 typedef int (*intrtn_t)(); 2384 intrtn_t routine; 2385 char *args[100]; 2386 int argno = 0; 2387 2388 va_start(ap); 2389 routine = (va_arg(ap, intrtn_t)); 2390 while ((args[argno++] = va_arg(ap, char *)) != 0) { 2391 ; 2392 } 2393 va_end(ap); 2394 return (*routine)(argno-1, args); 2395 } 2396 2397 2398 static Command * 2399 getcmd(name) 2400 char *name; 2401 { 2402 Command *cm; 2403 2404 if (cm = (Command *) genget(name, (char **) cmdtab, sizeof(Command))) 2405 return cm; 2406 return (Command *) genget(name, (char **) cmdtab2, sizeof(Command)); 2407 } 2408 2409 void 2410 command(top, tbuf, cnt) 2411 int top; 2412 char *tbuf; 2413 int cnt; 2414 { 2415 register Command *c; 2416 2417 setcommandmode(); 2418 if (!top) { 2419 putchar('\n'); 2420 #if defined(unix) 2421 } else { 2422 (void) signal(SIGINT, SIG_DFL); 2423 (void) signal(SIGQUIT, SIG_DFL); 2424 #endif /* defined(unix) */ 2425 } 2426 for (;;) { 2427 if (rlogin == _POSIX_VDISABLE) 2428 printf("%s> ", prompt); 2429 if (tbuf) { 2430 register char *cp; 2431 cp = line; 2432 while (cnt > 0 && (*cp++ = *tbuf++) != '\n') 2433 cnt--; 2434 tbuf = 0; 2435 if (cp == line || *--cp != '\n' || cp == line) 2436 goto getline; 2437 *cp = '\0'; 2438 if (rlogin == _POSIX_VDISABLE) 2439 printf("%s\n", line); 2440 } else { 2441 getline: 2442 if (rlogin != _POSIX_VDISABLE) 2443 printf("%s> ", prompt); 2444 if (fgets(line, sizeof(line), stdin) == NULL) { 2445 if (feof(stdin) || ferror(stdin)) { 2446 (void) quit(); 2447 /*NOTREACHED*/ 2448 } 2449 break; 2450 } 2451 } 2452 if (line[0] == 0) 2453 break; 2454 makeargv(); 2455 if (margv[0] == 0) { 2456 break; 2457 } 2458 c = getcmd(margv[0]); 2459 if (Ambiguous(c)) { 2460 printf("?Ambiguous command\n"); 2461 continue; 2462 } 2463 if (c == 0) { 2464 printf("?Invalid command\n"); 2465 continue; 2466 } 2467 if (c->needconnect && !connected) { 2468 printf("?Need to be connected first.\n"); 2469 continue; 2470 } 2471 if ((*c->handler)(margc, margv)) { 2472 break; 2473 } 2474 } 2475 if (!top) { 2476 if (!connected) { 2477 longjmp(toplevel, 1); 2478 /*NOTREACHED*/ 2479 } 2480 #if defined(TN3270) 2481 if (shell_active == 0) { 2482 setconnmode(0); 2483 } 2484 #else /* defined(TN3270) */ 2485 setconnmode(0); 2486 #endif /* defined(TN3270) */ 2487 } 2488 } 2489 2490 /* 2491 * Help command. 2492 */ 2493 static 2494 help(argc, argv) 2495 int argc; 2496 char *argv[]; 2497 { 2498 register Command *c; 2499 2500 if (argc == 1) { 2501 printf("Commands may be abbreviated. Commands are:\n\n"); 2502 for (c = cmdtab; c->name; c++) 2503 if (c->help) { 2504 printf("%-*s\t%s\n", HELPINDENT, c->name, 2505 c->help); 2506 } 2507 return 0; 2508 } 2509 while (--argc > 0) { 2510 register char *arg; 2511 arg = *++argv; 2512 c = getcmd(arg); 2513 if (Ambiguous(c)) 2514 printf("?Ambiguous help command %s\n", arg); 2515 else if (c == (Command *)0) 2516 printf("?Invalid help command %s\n", arg); 2517 else 2518 printf("%s\n", c->help); 2519 } 2520 return 0; 2521 } 2522 2523 static char *rcname = 0; 2524 static char rcbuf[128]; 2525 2526 cmdrc(m1, m2) 2527 char *m1, *m2; 2528 { 2529 register Command *c; 2530 FILE *rcfile; 2531 int gotmachine = 0; 2532 int l1 = strlen(m1); 2533 int l2 = strlen(m2); 2534 char m1save[64]; 2535 2536 if (skiprc) 2537 return; 2538 2539 strcpy(m1save, m1); 2540 m1 = m1save; 2541 2542 if (rcname == 0) { 2543 rcname = getenv("HOME"); 2544 if (rcname) 2545 strcpy(rcbuf, rcname); 2546 else 2547 rcbuf[0] = '\0'; 2548 strcat(rcbuf, "/.telnetrc"); 2549 rcname = rcbuf; 2550 } 2551 2552 if ((rcfile = fopen(rcname, "r")) == 0) { 2553 return; 2554 } 2555 2556 for (;;) { 2557 if (fgets(line, sizeof(line), rcfile) == NULL) 2558 break; 2559 if (line[0] == 0) 2560 break; 2561 if (line[0] == '#') 2562 continue; 2563 if (gotmachine) { 2564 if (!isspace(line[0])) 2565 gotmachine = 0; 2566 } 2567 if (gotmachine == 0) { 2568 if (isspace(line[0])) 2569 continue; 2570 if (strncasecmp(line, m1, l1) == 0) 2571 strncpy(line, &line[l1], sizeof(line) - l1); 2572 else if (strncasecmp(line, m2, l2) == 0) 2573 strncpy(line, &line[l2], sizeof(line) - l2); 2574 else if (strncasecmp(line, "DEFAULT", 7) == 0) 2575 strncpy(line, &line[7], sizeof(line) - 7); 2576 else 2577 continue; 2578 if (line[0] != ' ' && line[0] != '\t' && line[0] != '\n') 2579 continue; 2580 gotmachine = 1; 2581 } 2582 makeargv(); 2583 if (margv[0] == 0) 2584 continue; 2585 c = getcmd(margv[0]); 2586 if (Ambiguous(c)) { 2587 printf("?Ambiguous command: %s\n", margv[0]); 2588 continue; 2589 } 2590 if (c == 0) { 2591 printf("?Invalid command: %s\n", margv[0]); 2592 continue; 2593 } 2594 /* 2595 * This should never happen... 2596 */ 2597 if (c->needconnect && !connected) { 2598 printf("?Need to be connected first for %s.\n", margv[0]); 2599 continue; 2600 } 2601 (*c->handler)(margc, margv); 2602 } 2603 fclose(rcfile); 2604 } 2605 2606 #if defined(IP_OPTIONS) && defined(IPPROTO_IP) 2607 2608 /* 2609 * Source route is handed in as 2610 * [!]@hop1@hop2...[@|:]dst 2611 * If the leading ! is present, it is a 2612 * strict source route, otherwise it is 2613 * assmed to be a loose source route. 2614 * 2615 * We fill in the source route option as 2616 * hop1,hop2,hop3...dest 2617 * and return a pointer to hop1, which will 2618 * be the address to connect() to. 2619 * 2620 * Arguments: 2621 * arg: pointer to route list to decipher 2622 * 2623 * cpp: If *cpp is not equal to NULL, this is a 2624 * pointer to a pointer to a character array 2625 * that should be filled in with the option. 2626 * 2627 * lenp: pointer to an integer that contains the 2628 * length of *cpp if *cpp != NULL. 2629 * 2630 * Return values: 2631 * 2632 * Returns the address of the host to connect to. If the 2633 * return value is -1, there was a syntax error in the 2634 * option, either unknown characters, or too many hosts. 2635 * If the return value is 0, one of the hostnames in the 2636 * path is unknown, and *cpp is set to point to the bad 2637 * hostname. 2638 * 2639 * *cpp: If *cpp was equal to NULL, it will be filled 2640 * in with a pointer to our static area that has 2641 * the option filled in. This will be 32bit aligned. 2642 * 2643 * *lenp: This will be filled in with how long the option 2644 * pointed to by *cpp is. 2645 * 2646 */ 2647 unsigned long 2648 sourceroute(arg, cpp, lenp) 2649 char *arg; 2650 char **cpp; 2651 int *lenp; 2652 { 2653 static char lsr[44]; 2654 #ifdef sysV88 2655 static IOPTN ipopt; 2656 #endif 2657 char *cp, *cp2, *lsrp, *lsrep; 2658 register int tmp; 2659 struct in_addr sin_addr; 2660 register struct hostent *host = 0; 2661 register char c; 2662 2663 /* 2664 * Verify the arguments, and make sure we have 2665 * at least 7 bytes for the option. 2666 */ 2667 if (cpp == NULL || lenp == NULL) 2668 return((unsigned long)-1); 2669 if (*cpp != NULL && *lenp < 7) 2670 return((unsigned long)-1); 2671 /* 2672 * Decide whether we have a buffer passed to us, 2673 * or if we need to use our own static buffer. 2674 */ 2675 if (*cpp) { 2676 lsrp = *cpp; 2677 lsrep = lsrp + *lenp; 2678 } else { 2679 *cpp = lsrp = lsr; 2680 lsrep = lsrp + 44; 2681 } 2682 2683 cp = arg; 2684 2685 /* 2686 * Next, decide whether we have a loose source 2687 * route or a strict source route, and fill in 2688 * the begining of the option. 2689 */ 2690 #ifndef sysV88 2691 if (*cp == '!') { 2692 cp++; 2693 *lsrp++ = IPOPT_SSRR; 2694 } else 2695 *lsrp++ = IPOPT_LSRR; 2696 #else 2697 if (*cp == '!') { 2698 cp++; 2699 ipopt.io_type = IPOPT_SSRR; 2700 } else 2701 ipopt.io_type = IPOPT_LSRR; 2702 #endif 2703 2704 if (*cp != '@') 2705 return((unsigned long)-1); 2706 2707 #ifndef sysV88 2708 lsrp++; /* skip over length, we'll fill it in later */ 2709 *lsrp++ = 4; 2710 #endif 2711 2712 cp++; 2713 2714 sin_addr.s_addr = 0; 2715 2716 for (c = 0;;) { 2717 if (c == ':') 2718 cp2 = 0; 2719 else for (cp2 = cp; c = *cp2; cp2++) { 2720 if (c == ',') { 2721 *cp2++ = '\0'; 2722 if (*cp2 == '@') 2723 cp2++; 2724 } else if (c == '@') { 2725 *cp2++ = '\0'; 2726 } else if (c == ':') { 2727 *cp2++ = '\0'; 2728 } else 2729 continue; 2730 break; 2731 } 2732 if (!c) 2733 cp2 = 0; 2734 2735 if ((tmp = inet_addr(cp)) != -1) { 2736 sin_addr.s_addr = tmp; 2737 } else if (host = gethostbyname(cp)) { 2738 #if defined(h_addr) 2739 memcpy((caddr_t)&sin_addr, 2740 host->h_addr_list[0], host->h_length); 2741 #else 2742 memcpy((caddr_t)&sin_addr, host->h_addr, host->h_length); 2743 #endif 2744 } else { 2745 *cpp = cp; 2746 return(0); 2747 } 2748 memcpy(lsrp, (char *)&sin_addr, 4); 2749 lsrp += 4; 2750 if (cp2) 2751 cp = cp2; 2752 else 2753 break; 2754 /* 2755 * Check to make sure there is space for next address 2756 */ 2757 if (lsrp + 4 > lsrep) 2758 return((unsigned long)-1); 2759 } 2760 #ifndef sysV88 2761 if ((*(*cpp+IPOPT_OLEN) = lsrp - *cpp) <= 7) { 2762 *cpp = 0; 2763 *lenp = 0; 2764 return((unsigned long)-1); 2765 } 2766 *lsrp++ = IPOPT_NOP; /* 32 bit word align it */ 2767 *lenp = lsrp - *cpp; 2768 #else 2769 ipopt.io_len = lsrp - *cpp; 2770 if (ipopt.io_len <= 5) { /* Is 3 better ? */ 2771 *cpp = 0; 2772 *lenp = 0; 2773 return((unsigned long)-1); 2774 } 2775 *lenp = sizeof(ipopt); 2776 *cpp = (char *) &ipopt; 2777 #endif 2778 return(sin_addr.s_addr); 2779 } 2780 #endif 2781