commands.c revision 29089
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 35static char sccsid[] = "@(#)commands.c 8.4 (Berkeley) 5/30/95"; 36#endif /* not lint */ 37 38#if defined(unix) 39#include <sys/param.h> 40#if defined(CRAY) || defined(sysV88) 41#include <sys/types.h> 42#endif 43#include <sys/file.h> 44#else 45#include <sys/types.h> 46#endif /* defined(unix) */ 47#include <sys/socket.h> 48#include <netinet/in.h> 49#ifdef CRAY 50#include <fcntl.h> 51#endif /* CRAY */ 52 53#include <signal.h> 54#include <netdb.h> 55#include <ctype.h> 56#include <pwd.h> 57#include <varargs.h> 58#include <errno.h> 59 60#include <arpa/telnet.h> 61 62#include "general.h" 63 64#include "ring.h" 65 66#include "externs.h" 67#include "defines.h" 68#include "types.h" 69 70#if !defined(CRAY) && !defined(sysV88) 71#include <netinet/in_systm.h> 72# if (defined(vax) || defined(tahoe) || defined(hp300)) && !defined(ultrix) 73# include <machine/endian.h> 74# endif /* vax */ 75#endif /* !defined(CRAY) && !defined(sysV88) */ 76#include <netinet/ip.h> 77 78 79#ifndef MAXHOSTNAMELEN 80#define MAXHOSTNAMELEN 64 81#endif MAXHOSTNAMELEN 82 83#if defined(IPPROTO_IP) && defined(IP_TOS) 84int tos = -1; 85#endif /* defined(IPPROTO_IP) && defined(IP_TOS) */ 86 87char *hostname; 88static char _hostname[MAXHOSTNAMELEN]; 89 90extern char *getenv(); 91 92extern int isprefix(); 93extern char **genget(); 94extern int Ambiguous(); 95 96static call(); 97 98typedef struct { 99 char *name; /* command name */ 100 char *help; /* help string (NULL for no help) */ 101 int (*handler)(); /* routine which executes command */ 102 int needconnect; /* Do we need to be connected to execute? */ 103} Command; 104 105static char line[256]; 106static char saveline[256]; 107static int margc; 108static char *margv[20]; 109 110 static void 111makeargv() 112{ 113 register char *cp, *cp2, c; 114 register char **argp = margv; 115 116 margc = 0; 117 cp = line; 118 if (*cp == '!') { /* Special case shell escape */ 119 strcpy(saveline, line); /* save for shell command */ 120 *argp++ = "!"; /* No room in string to get this */ 121 margc++; 122 cp++; 123 } 124 while (c = *cp) { 125 register int inquote = 0; 126 while (isspace(c)) 127 c = *++cp; 128 if (c == '\0') 129 break; 130 *argp++ = cp; 131 margc += 1; 132 for (cp2 = cp; c != '\0'; c = *++cp) { 133 if (inquote) { 134 if (c == inquote) { 135 inquote = 0; 136 continue; 137 } 138 } else { 139 if (c == '\\') { 140 if ((c = *++cp) == '\0') 141 break; 142 } else if (c == '"') { 143 inquote = '"'; 144 continue; 145 } else if (c == '\'') { 146 inquote = '\''; 147 continue; 148 } else if (isspace(c)) 149 break; 150 } 151 *cp2++ = c; 152 } 153 *cp2 = '\0'; 154 if (c == '\0') 155 break; 156 cp++; 157 } 158 *argp++ = 0; 159} 160 161/* 162 * Make a character string into a number. 163 * 164 * Todo: 1. Could take random integers (12, 0x12, 012, 0b1). 165 */ 166 167 static 168special(s) 169 register char *s; 170{ 171 register char c; 172 char b; 173 174 switch (*s) { 175 case '^': 176 b = *++s; 177 if (b == '?') { 178 c = b | 0x40; /* DEL */ 179 } else { 180 c = b & 0x1f; 181 } 182 break; 183 default: 184 c = *s; 185 break; 186 } 187 return c; 188} 189 190/* 191 * Construct a control character sequence 192 * for a special character. 193 */ 194 static char * 195control(c) 196 register cc_t c; 197{ 198 static char buf[5]; 199 /* 200 * The only way I could get the Sun 3.5 compiler 201 * to shut up about 202 * if ((unsigned int)c >= 0x80) 203 * was to assign "c" to an unsigned int variable... 204 * Arggg.... 205 */ 206 register unsigned int uic = (unsigned int)c; 207 208 if (uic == 0x7f) 209 return ("^?"); 210 if (c == (cc_t)_POSIX_VDISABLE) { 211 return "off"; 212 } 213 if (uic >= 0x80) { 214 buf[0] = '\\'; 215 buf[1] = ((c>>6)&07) + '0'; 216 buf[2] = ((c>>3)&07) + '0'; 217 buf[3] = (c&07) + '0'; 218 buf[4] = 0; 219 } else if (uic >= 0x20) { 220 buf[0] = c; 221 buf[1] = 0; 222 } else { 223 buf[0] = '^'; 224 buf[1] = '@'+c; 225 buf[2] = 0; 226 } 227 return (buf); 228} 229 230 231 232/* 233 * The following are data structures and routines for 234 * the "send" command. 235 * 236 */ 237 238struct sendlist { 239 char *name; /* How user refers to it (case independent) */ 240 char *help; /* Help information (0 ==> no help) */ 241 int needconnect; /* Need to be connected */ 242 int narg; /* Number of arguments */ 243 int (*handler)(); /* Routine to perform (for special ops) */ 244 int nbyte; /* Number of bytes to send this command */ 245 int what; /* Character to be sent (<0 ==> special) */ 246}; 247 248 249static int 250 send_esc P((void)), 251 send_help P((void)), 252 send_docmd P((char *)), 253 send_dontcmd P((char *)), 254 send_willcmd P((char *)), 255 send_wontcmd P((char *)); 256 257static struct sendlist Sendlist[] = { 258 { "ao", "Send Telnet Abort output", 1, 0, 0, 2, AO }, 259 { "ayt", "Send Telnet 'Are You There'", 1, 0, 0, 2, AYT }, 260 { "brk", "Send Telnet Break", 1, 0, 0, 2, BREAK }, 261 { "break", 0, 1, 0, 0, 2, BREAK }, 262 { "ec", "Send Telnet Erase Character", 1, 0, 0, 2, EC }, 263 { "el", "Send Telnet Erase Line", 1, 0, 0, 2, EL }, 264 { "escape", "Send current escape character", 1, 0, send_esc, 1, 0 }, 265 { "ga", "Send Telnet 'Go Ahead' sequence", 1, 0, 0, 2, GA }, 266 { "ip", "Send Telnet Interrupt Process", 1, 0, 0, 2, IP }, 267 { "intp", 0, 1, 0, 0, 2, IP }, 268 { "interrupt", 0, 1, 0, 0, 2, IP }, 269 { "intr", 0, 1, 0, 0, 2, IP }, 270 { "nop", "Send Telnet 'No operation'", 1, 0, 0, 2, NOP }, 271 { "eor", "Send Telnet 'End of Record'", 1, 0, 0, 2, EOR }, 272 { "abort", "Send Telnet 'Abort Process'", 1, 0, 0, 2, ABORT }, 273 { "susp", "Send Telnet 'Suspend Process'", 1, 0, 0, 2, SUSP }, 274 { "eof", "Send Telnet End of File Character", 1, 0, 0, 2, xEOF }, 275 { "synch", "Perform Telnet 'Synch operation'", 1, 0, dosynch, 2, 0 }, 276 { "getstatus", "Send request for STATUS", 1, 0, get_status, 6, 0 }, 277 { "?", "Display send options", 0, 0, send_help, 0, 0 }, 278 { "help", 0, 0, 0, send_help, 0, 0 }, 279 { "do", 0, 0, 1, send_docmd, 3, 0 }, 280 { "dont", 0, 0, 1, send_dontcmd, 3, 0 }, 281 { "will", 0, 0, 1, send_willcmd, 3, 0 }, 282 { "wont", 0, 0, 1, send_wontcmd, 3, 0 }, 283 { 0 } 284}; 285 286#define GETSEND(name) ((struct sendlist *) genget(name, (char **) Sendlist, \ 287 sizeof(struct sendlist))) 288 289 static int 290sendcmd(argc, argv) 291 int argc; 292 char **argv; 293{ 294 int count; /* how many bytes we are going to need to send */ 295 int i; 296 int question = 0; /* was at least one argument a question */ 297 struct sendlist *s; /* pointer to current command */ 298 int success = 0; 299 int needconnect = 0; 300 301 if (argc < 2) { 302 printf("need at least one argument for 'send' command\n"); 303 printf("'send ?' for help\n"); 304 return 0; 305 } 306 /* 307 * First, validate all the send arguments. 308 * In addition, we see how much space we are going to need, and 309 * whether or not we will be doing a "SYNCH" operation (which 310 * flushes the network queue). 311 */ 312 count = 0; 313 for (i = 1; i < argc; i++) { 314 s = GETSEND(argv[i]); 315 if (s == 0) { 316 printf("Unknown send argument '%s'\n'send ?' for help.\n", 317 argv[i]); 318 return 0; 319 } else if (Ambiguous(s)) { 320 printf("Ambiguous send argument '%s'\n'send ?' for help.\n", 321 argv[i]); 322 return 0; 323 } 324 if (i + s->narg >= argc) { 325 fprintf(stderr, 326 "Need %d argument%s to 'send %s' command. 'send %s ?' for help.\n", 327 s->narg, s->narg == 1 ? "" : "s", s->name, s->name); 328 return 0; 329 } 330 count += s->nbyte; 331 if (s->handler == send_help) { 332 send_help(); 333 return 0; 334 } 335 336 i += s->narg; 337 needconnect += s->needconnect; 338 } 339 if (!connected && needconnect) { 340 printf("?Need to be connected first.\n"); 341 printf("'send ?' for help\n"); 342 return 0; 343 } 344 /* Now, do we have enough room? */ 345 if (NETROOM() < count) { 346 printf("There is not enough room in the buffer TO the network\n"); 347 printf("to process your request. Nothing will be done.\n"); 348 printf("('send synch' will throw away most data in the network\n"); 349 printf("buffer, if this might help.)\n"); 350 return 0; 351 } 352 /* OK, they are all OK, now go through again and actually send */ 353 count = 0; 354 for (i = 1; i < argc; i++) { 355 if ((s = GETSEND(argv[i])) == 0) { 356 fprintf(stderr, "Telnet 'send' error - argument disappeared!\n"); 357 (void) quit(); 358 /*NOTREACHED*/ 359 } 360 if (s->handler) { 361 count++; 362 success += (*s->handler)((s->narg > 0) ? argv[i+1] : 0, 363 (s->narg > 1) ? argv[i+2] : 0); 364 i += s->narg; 365 } else { 366 NET2ADD(IAC, s->what); 367 printoption("SENT", IAC, s->what); 368 } 369 } 370 return (count == success); 371} 372 373 static int 374send_esc() 375{ 376 NETADD(escape); 377 return 1; 378} 379 380 static int 381send_docmd(name) 382 char *name; 383{ 384 return(send_tncmd(send_do, "do", name)); 385} 386 387 static int 388send_dontcmd(name) 389 char *name; 390{ 391 return(send_tncmd(send_dont, "dont", name)); 392} 393 static int 394send_willcmd(name) 395 char *name; 396{ 397 return(send_tncmd(send_will, "will", name)); 398} 399 static int 400send_wontcmd(name) 401 char *name; 402{ 403 return(send_tncmd(send_wont, "wont", name)); 404} 405 406 int 407send_tncmd(func, cmd, name) 408 void (*func)(); 409 char *cmd, *name; 410{ 411 char **cpp; 412 extern char *telopts[]; 413 register int val = 0; 414 415 if (isprefix(name, "help") || isprefix(name, "?")) { 416 register int col, len; 417 418 printf("Usage: send %s <value|option>\n", cmd); 419 printf("\"value\" must be from 0 to 255\n"); 420 printf("Valid options are:\n\t"); 421 422 col = 8; 423 for (cpp = telopts; *cpp; cpp++) { 424 len = strlen(*cpp) + 3; 425 if (col + len > 65) { 426 printf("\n\t"); 427 col = 8; 428 } 429 printf(" \"%s\"", *cpp); 430 col += len; 431 } 432 printf("\n"); 433 return 0; 434 } 435 cpp = (char **)genget(name, telopts, sizeof(char *)); 436 if (Ambiguous(cpp)) { 437 fprintf(stderr,"'%s': ambiguous argument ('send %s ?' for help).\n", 438 name, cmd); 439 return 0; 440 } 441 if (cpp) { 442 val = cpp - telopts; 443 } else { 444 register char *cp = name; 445 446 while (*cp >= '0' && *cp <= '9') { 447 val *= 10; 448 val += *cp - '0'; 449 cp++; 450 } 451 if (*cp != 0) { 452 fprintf(stderr, "'%s': unknown argument ('send %s ?' for help).\n", 453 name, cmd); 454 return 0; 455 } else if (val < 0 || val > 255) { 456 fprintf(stderr, "'%s': bad value ('send %s ?' for help).\n", 457 name, cmd); 458 return 0; 459 } 460 } 461 if (!connected) { 462 printf("?Need to be connected first.\n"); 463 return 0; 464 } 465 (*func)(val, 1); 466 return 1; 467} 468 469 static int 470send_help() 471{ 472 struct sendlist *s; /* pointer to current command */ 473 for (s = Sendlist; s->name; s++) { 474 if (s->help) 475 printf("%-15s %s\n", s->name, s->help); 476 } 477 return(0); 478} 479 480/* 481 * The following are the routines and data structures referred 482 * to by the arguments to the "toggle" command. 483 */ 484 485 static int 486lclchars() 487{ 488 donelclchars = 1; 489 return 1; 490} 491 492 static int 493togdebug() 494{ 495#ifndef NOT43 496 if (net > 0 && 497 (SetSockOpt(net, SOL_SOCKET, SO_DEBUG, debug)) < 0) { 498 perror("setsockopt (SO_DEBUG)"); 499 } 500#else /* NOT43 */ 501 if (debug) { 502 if (net > 0 && SetSockOpt(net, SOL_SOCKET, SO_DEBUG, 0, 0) < 0) 503 perror("setsockopt (SO_DEBUG)"); 504 } else 505 printf("Cannot turn off socket debugging\n"); 506#endif /* NOT43 */ 507 return 1; 508} 509 510 511 static int 512togcrlf() 513{ 514 if (crlf) { 515 printf("Will send carriage returns as telnet <CR><LF>.\n"); 516 } else { 517 printf("Will send carriage returns as telnet <CR><NUL>.\n"); 518 } 519 return 1; 520} 521 522int binmode; 523 524 static int 525togbinary(val) 526 int val; 527{ 528 donebinarytoggle = 1; 529 530 if (val >= 0) { 531 binmode = val; 532 } else { 533 if (my_want_state_is_will(TELOPT_BINARY) && 534 my_want_state_is_do(TELOPT_BINARY)) { 535 binmode = 1; 536 } else if (my_want_state_is_wont(TELOPT_BINARY) && 537 my_want_state_is_dont(TELOPT_BINARY)) { 538 binmode = 0; 539 } 540 val = binmode ? 0 : 1; 541 } 542 543 if (val == 1) { 544 if (my_want_state_is_will(TELOPT_BINARY) && 545 my_want_state_is_do(TELOPT_BINARY)) { 546 printf("Already operating in binary mode with remote host.\n"); 547 } else { 548 printf("Negotiating binary mode with remote host.\n"); 549 tel_enter_binary(3); 550 } 551 } else { 552 if (my_want_state_is_wont(TELOPT_BINARY) && 553 my_want_state_is_dont(TELOPT_BINARY)) { 554 printf("Already in network ascii mode with remote host.\n"); 555 } else { 556 printf("Negotiating network ascii mode with remote host.\n"); 557 tel_leave_binary(3); 558 } 559 } 560 return 1; 561} 562 563 static int 564togrbinary(val) 565 int val; 566{ 567 donebinarytoggle = 1; 568 569 if (val == -1) 570 val = my_want_state_is_do(TELOPT_BINARY) ? 0 : 1; 571 572 if (val == 1) { 573 if (my_want_state_is_do(TELOPT_BINARY)) { 574 printf("Already receiving in binary mode.\n"); 575 } else { 576 printf("Negotiating binary mode on input.\n"); 577 tel_enter_binary(1); 578 } 579 } else { 580 if (my_want_state_is_dont(TELOPT_BINARY)) { 581 printf("Already receiving in network ascii mode.\n"); 582 } else { 583 printf("Negotiating network ascii mode on input.\n"); 584 tel_leave_binary(1); 585 } 586 } 587 return 1; 588} 589 590 static int 591togxbinary(val) 592 int val; 593{ 594 donebinarytoggle = 1; 595 596 if (val == -1) 597 val = my_want_state_is_will(TELOPT_BINARY) ? 0 : 1; 598 599 if (val == 1) { 600 if (my_want_state_is_will(TELOPT_BINARY)) { 601 printf("Already transmitting in binary mode.\n"); 602 } else { 603 printf("Negotiating binary mode on output.\n"); 604 tel_enter_binary(2); 605 } 606 } else { 607 if (my_want_state_is_wont(TELOPT_BINARY)) { 608 printf("Already transmitting in network ascii mode.\n"); 609 } else { 610 printf("Negotiating network ascii mode on output.\n"); 611 tel_leave_binary(2); 612 } 613 } 614 return 1; 615} 616 617 618static int togglehelp P((void)); 619#if defined(AUTHENTICATION) 620extern int auth_togdebug P((int)); 621#endif 622#ifdef ENCRYPTION 623extern int EncryptAutoEnc P((int)); 624extern int EncryptAutoDec P((int)); 625extern int EncryptDebug P((int)); 626extern int EncryptVerbose P((int)); 627#endif /* ENCRYPTION */ 628 629struct togglelist { 630 char *name; /* name of toggle */ 631 char *help; /* help message */ 632 int (*handler)(); /* routine to do actual setting */ 633 int *variable; 634 char *actionexplanation; 635}; 636 637static struct togglelist Togglelist[] = { 638 { "autoflush", 639 "flushing of output when sending interrupt characters", 640 0, 641 &autoflush, 642 "flush output when sending interrupt characters" }, 643 { "autosynch", 644 "automatic sending of interrupt characters in urgent mode", 645 0, 646 &autosynch, 647 "send interrupt characters in urgent mode" }, 648#if defined(AUTHENTICATION) 649 { "autologin", 650 "automatic sending of login and/or authentication info", 651 0, 652 &autologin, 653 "send login name and/or authentication information" }, 654 { "authdebug", 655 "Toggle authentication debugging", 656 auth_togdebug, 657 0, 658 "print authentication debugging information" }, 659#endif 660#ifdef ENCRYPTION 661 { "autoencrypt", 662 "automatic encryption of data stream", 663 EncryptAutoEnc, 664 0, 665 "automatically encrypt output" }, 666 { "autodecrypt", 667 "automatic decryption of data stream", 668 EncryptAutoDec, 669 0, 670 "automatically decrypt input" }, 671 { "verbose_encrypt", 672 "Toggle verbose encryption output", 673 EncryptVerbose, 674 0, 675 "print verbose encryption output" }, 676 { "encdebug", 677 "Toggle encryption debugging", 678 EncryptDebug, 679 0, 680 "print encryption debugging information" }, 681#endif /* ENCRYPTION */ 682 { "skiprc", 683 "don't read ~/.telnetrc file", 684 0, 685 &skiprc, 686 "skip reading of ~/.telnetrc file" }, 687 { "binary", 688 "sending and receiving of binary data", 689 togbinary, 690 0, 691 0 }, 692 { "inbinary", 693 "receiving of binary data", 694 togrbinary, 695 0, 696 0 }, 697 { "outbinary", 698 "sending of binary data", 699 togxbinary, 700 0, 701 0 }, 702 { "crlf", 703 "sending carriage returns as telnet <CR><LF>", 704 togcrlf, 705 &crlf, 706 0 }, 707 { "crmod", 708 "mapping of received carriage returns", 709 0, 710 &crmod, 711 "map carriage return on output" }, 712 { "localchars", 713 "local recognition of certain control characters", 714 lclchars, 715 &localchars, 716 "recognize certain control characters" }, 717 { " ", "", 0 }, /* empty line */ 718#if defined(unix) && defined(TN3270) 719 { "apitrace", 720 "(debugging) toggle tracing of API transactions", 721 0, 722 &apitrace, 723 "trace API transactions" }, 724 { "cursesdata", 725 "(debugging) toggle printing of hexadecimal curses data", 726 0, 727 &cursesdata, 728 "print hexadecimal representation of curses data" }, 729#endif /* defined(unix) && defined(TN3270) */ 730 { "debug", 731 "debugging", 732 togdebug, 733 &debug, 734 "turn on socket level debugging" }, 735 { "netdata", 736 "printing of hexadecimal network data (debugging)", 737 0, 738 &netdata, 739 "print hexadecimal representation of network traffic" }, 740 { "prettydump", 741 "output of \"netdata\" to user readable format (debugging)", 742 0, 743 &prettydump, 744 "print user readable output for \"netdata\"" }, 745 { "options", 746 "viewing of options processing (debugging)", 747 0, 748 &showoptions, 749 "show option processing" }, 750#if defined(unix) 751 { "termdata", 752 "(debugging) toggle printing of hexadecimal terminal data", 753 0, 754 &termdata, 755 "print hexadecimal representation of terminal traffic" }, 756#endif /* defined(unix) */ 757 { "?", 758 0, 759 togglehelp }, 760 { "help", 761 0, 762 togglehelp }, 763 { 0 } 764}; 765 766 static int 767togglehelp() 768{ 769 struct togglelist *c; 770 771 for (c = Togglelist; c->name; c++) { 772 if (c->help) { 773 if (*c->help) 774 printf("%-15s toggle %s\n", c->name, c->help); 775 else 776 printf("\n"); 777 } 778 } 779 printf("\n"); 780 printf("%-15s %s\n", "?", "display help information"); 781 return 0; 782} 783 784 static void 785settogglehelp(set) 786 int set; 787{ 788 struct togglelist *c; 789 790 for (c = Togglelist; c->name; c++) { 791 if (c->help) { 792 if (*c->help) 793 printf("%-15s %s %s\n", c->name, set ? "enable" : "disable", 794 c->help); 795 else 796 printf("\n"); 797 } 798 } 799} 800 801#define GETTOGGLE(name) (struct togglelist *) \ 802 genget(name, (char **) Togglelist, sizeof(struct togglelist)) 803 804 static int 805toggle(argc, argv) 806 int argc; 807 char *argv[]; 808{ 809 int retval = 1; 810 char *name; 811 struct togglelist *c; 812 813 if (argc < 2) { 814 fprintf(stderr, 815 "Need an argument to 'toggle' command. 'toggle ?' for help.\n"); 816 return 0; 817 } 818 argc--; 819 argv++; 820 while (argc--) { 821 name = *argv++; 822 c = GETTOGGLE(name); 823 if (Ambiguous(c)) { 824 fprintf(stderr, "'%s': ambiguous argument ('toggle ?' for help).\n", 825 name); 826 return 0; 827 } else if (c == 0) { 828 fprintf(stderr, "'%s': unknown argument ('toggle ?' for help).\n", 829 name); 830 return 0; 831 } else { 832 if (c->variable) { 833 *c->variable = !*c->variable; /* invert it */ 834 if (c->actionexplanation) { 835 printf("%s %s.\n", *c->variable? "Will" : "Won't", 836 c->actionexplanation); 837 } 838 } 839 if (c->handler) { 840 retval &= (*c->handler)(-1); 841 } 842 } 843 } 844 return retval; 845} 846 847/* 848 * The following perform the "set" command. 849 */ 850 851#ifdef USE_TERMIO 852struct termio new_tc = { 0 }; 853#endif 854 855struct setlist { 856 char *name; /* name */ 857 char *help; /* help information */ 858 void (*handler)(); 859 cc_t *charp; /* where it is located at */ 860}; 861 862static struct setlist Setlist[] = { 863#ifdef KLUDGELINEMODE 864 { "echo", "character to toggle local echoing on/off", 0, &echoc }, 865#endif 866 { "escape", "character to escape back to telnet command mode", 0, &escape }, 867 { "rlogin", "rlogin escape character", 0, &rlogin }, 868 { "tracefile", "file to write trace information to", SetNetTrace, (cc_t *)NetTraceFile}, 869 { " ", "" }, 870 { " ", "The following need 'localchars' to be toggled true", 0, 0 }, 871 { "flushoutput", "character to cause an Abort Output", 0, termFlushCharp }, 872 { "interrupt", "character to cause an Interrupt Process", 0, termIntCharp }, 873 { "quit", "character to cause an Abort process", 0, termQuitCharp }, 874 { "eof", "character to cause an EOF ", 0, termEofCharp }, 875 { " ", "" }, 876 { " ", "The following are for local editing in linemode", 0, 0 }, 877 { "erase", "character to use to erase a character", 0, termEraseCharp }, 878 { "kill", "character to use to erase a line", 0, termKillCharp }, 879 { "lnext", "character to use for literal next", 0, termLiteralNextCharp }, 880 { "susp", "character to cause a Suspend Process", 0, termSuspCharp }, 881 { "reprint", "character to use for line reprint", 0, termRprntCharp }, 882 { "worderase", "character to use to erase a word", 0, termWerasCharp }, 883 { "start", "character to use for XON", 0, termStartCharp }, 884 { "stop", "character to use for XOFF", 0, termStopCharp }, 885 { "forw1", "alternate end of line character", 0, termForw1Charp }, 886 { "forw2", "alternate end of line character", 0, termForw2Charp }, 887 { "ayt", "alternate AYT character", 0, termAytCharp }, 888 { 0 } 889}; 890 891#if defined(CRAY) && !defined(__STDC__) 892/* Work around compiler bug in pcc 4.1.5 */ 893 void 894_setlist_init() 895{ 896#ifndef KLUDGELINEMODE 897#define N 5 898#else 899#define N 6 900#endif 901 Setlist[N+0].charp = &termFlushChar; 902 Setlist[N+1].charp = &termIntChar; 903 Setlist[N+2].charp = &termQuitChar; 904 Setlist[N+3].charp = &termEofChar; 905 Setlist[N+6].charp = &termEraseChar; 906 Setlist[N+7].charp = &termKillChar; 907 Setlist[N+8].charp = &termLiteralNextChar; 908 Setlist[N+9].charp = &termSuspChar; 909 Setlist[N+10].charp = &termRprntChar; 910 Setlist[N+11].charp = &termWerasChar; 911 Setlist[N+12].charp = &termStartChar; 912 Setlist[N+13].charp = &termStopChar; 913 Setlist[N+14].charp = &termForw1Char; 914 Setlist[N+15].charp = &termForw2Char; 915 Setlist[N+16].charp = &termAytChar; 916#undef N 917} 918#endif /* defined(CRAY) && !defined(__STDC__) */ 919 920 static struct setlist * 921getset(name) 922 char *name; 923{ 924 return (struct setlist *) 925 genget(name, (char **) Setlist, sizeof(struct setlist)); 926} 927 928 void 929set_escape_char(s) 930 char *s; 931{ 932 if (rlogin != _POSIX_VDISABLE) { 933 rlogin = (s && *s) ? special(s) : _POSIX_VDISABLE; 934 printf("Telnet rlogin escape character is '%s'.\n", 935 control(rlogin)); 936 } else { 937 escape = (s && *s) ? special(s) : _POSIX_VDISABLE; 938 printf("Telnet escape character is '%s'.\n", control(escape)); 939 } 940} 941 942 static int 943setcmd(argc, argv) 944 int argc; 945 char *argv[]; 946{ 947 int value; 948 struct setlist *ct; 949 struct togglelist *c; 950 951 if (argc < 2 || argc > 3) { 952 printf("Format is 'set Name Value'\n'set ?' for help.\n"); 953 return 0; 954 } 955 if ((argc == 2) && (isprefix(argv[1], "?") || isprefix(argv[1], "help"))) { 956 for (ct = Setlist; ct->name; ct++) 957 printf("%-15s %s\n", ct->name, ct->help); 958 printf("\n"); 959 settogglehelp(1); 960 printf("%-15s %s\n", "?", "display help information"); 961 return 0; 962 } 963 964 ct = getset(argv[1]); 965 if (ct == 0) { 966 c = GETTOGGLE(argv[1]); 967 if (c == 0) { 968 fprintf(stderr, "'%s': unknown argument ('set ?' for help).\n", 969 argv[1]); 970 return 0; 971 } else if (Ambiguous(c)) { 972 fprintf(stderr, "'%s': ambiguous argument ('set ?' for help).\n", 973 argv[1]); 974 return 0; 975 } 976 if (c->variable) { 977 if ((argc == 2) || (strcmp("on", argv[2]) == 0)) 978 *c->variable = 1; 979 else if (strcmp("off", argv[2]) == 0) 980 *c->variable = 0; 981 else { 982 printf("Format is 'set togglename [on|off]'\n'set ?' for help.\n"); 983 return 0; 984 } 985 if (c->actionexplanation) { 986 printf("%s %s.\n", *c->variable? "Will" : "Won't", 987 c->actionexplanation); 988 } 989 } 990 if (c->handler) 991 (*c->handler)(1); 992 } else if (argc != 3) { 993 printf("Format is 'set Name Value'\n'set ?' for help.\n"); 994 return 0; 995 } else if (Ambiguous(ct)) { 996 fprintf(stderr, "'%s': ambiguous argument ('set ?' for help).\n", 997 argv[1]); 998 return 0; 999 } else if (ct->handler) { 1000 (*ct->handler)(argv[2]); 1001 printf("%s set to \"%s\".\n", ct->name, (char *)ct->charp); 1002 } else { 1003 if (strcmp("off", argv[2])) { 1004 value = special(argv[2]); 1005 } else { 1006 value = _POSIX_VDISABLE; 1007 } 1008 *(ct->charp) = (cc_t)value; 1009 printf("%s character is '%s'.\n", ct->name, control(*(ct->charp))); 1010 } 1011 slc_check(); 1012 return 1; 1013} 1014 1015 static int 1016unsetcmd(argc, argv) 1017 int argc; 1018 char *argv[]; 1019{ 1020 struct setlist *ct; 1021 struct togglelist *c; 1022 register char *name; 1023 1024 if (argc < 2) { 1025 fprintf(stderr, 1026 "Need an argument to 'unset' command. 'unset ?' for help.\n"); 1027 return 0; 1028 } 1029 if (isprefix(argv[1], "?") || isprefix(argv[1], "help")) { 1030 for (ct = Setlist; ct->name; ct++) 1031 printf("%-15s %s\n", ct->name, ct->help); 1032 printf("\n"); 1033 settogglehelp(0); 1034 printf("%-15s %s\n", "?", "display help information"); 1035 return 0; 1036 } 1037 1038 argc--; 1039 argv++; 1040 while (argc--) { 1041 name = *argv++; 1042 ct = getset(name); 1043 if (ct == 0) { 1044 c = GETTOGGLE(name); 1045 if (c == 0) { 1046 fprintf(stderr, "'%s': unknown argument ('unset ?' for help).\n", 1047 name); 1048 return 0; 1049 } else if (Ambiguous(c)) { 1050 fprintf(stderr, "'%s': ambiguous argument ('unset ?' for help).\n", 1051 name); 1052 return 0; 1053 } 1054 if (c->variable) { 1055 *c->variable = 0; 1056 if (c->actionexplanation) { 1057 printf("%s %s.\n", *c->variable? "Will" : "Won't", 1058 c->actionexplanation); 1059 } 1060 } 1061 if (c->handler) 1062 (*c->handler)(0); 1063 } else if (Ambiguous(ct)) { 1064 fprintf(stderr, "'%s': ambiguous argument ('unset ?' for help).\n", 1065 name); 1066 return 0; 1067 } else if (ct->handler) { 1068 (*ct->handler)(0); 1069 printf("%s reset to \"%s\".\n", ct->name, (char *)ct->charp); 1070 } else { 1071 *(ct->charp) = _POSIX_VDISABLE; 1072 printf("%s character is '%s'.\n", ct->name, control(*(ct->charp))); 1073 } 1074 } 1075 return 1; 1076} 1077 1078/* 1079 * The following are the data structures and routines for the 1080 * 'mode' command. 1081 */ 1082#ifdef KLUDGELINEMODE 1083extern int kludgelinemode; 1084 1085 static int 1086dokludgemode() 1087{ 1088 kludgelinemode = 1; 1089 send_wont(TELOPT_LINEMODE, 1); 1090 send_dont(TELOPT_SGA, 1); 1091 send_dont(TELOPT_ECHO, 1); 1092} 1093#endif 1094 1095 static int 1096dolinemode() 1097{ 1098#ifdef KLUDGELINEMODE 1099 if (kludgelinemode) 1100 send_dont(TELOPT_SGA, 1); 1101#endif 1102 send_will(TELOPT_LINEMODE, 1); 1103 send_dont(TELOPT_ECHO, 1); 1104 return 1; 1105} 1106 1107 static int 1108docharmode() 1109{ 1110#ifdef KLUDGELINEMODE 1111 if (kludgelinemode) 1112 send_do(TELOPT_SGA, 1); 1113 else 1114#endif 1115 send_wont(TELOPT_LINEMODE, 1); 1116 send_do(TELOPT_ECHO, 1); 1117 return 1; 1118} 1119 1120 static int 1121dolmmode(bit, on) 1122 int bit, on; 1123{ 1124 unsigned char c; 1125 extern int linemode; 1126 1127 if (my_want_state_is_wont(TELOPT_LINEMODE)) { 1128 printf("?Need to have LINEMODE option enabled first.\n"); 1129 printf("'mode ?' for help.\n"); 1130 return 0; 1131 } 1132 1133 if (on) 1134 c = (linemode | bit); 1135 else 1136 c = (linemode & ~bit); 1137 lm_mode(&c, 1, 1); 1138 return 1; 1139} 1140 1141 int 1142setmode(bit) 1143{ 1144 return dolmmode(bit, 1); 1145} 1146 1147 int 1148clearmode(bit) 1149{ 1150 return dolmmode(bit, 0); 1151} 1152 1153struct modelist { 1154 char *name; /* command name */ 1155 char *help; /* help string */ 1156 int (*handler)(); /* routine which executes command */ 1157 int needconnect; /* Do we need to be connected to execute? */ 1158 int arg1; 1159}; 1160 1161extern int modehelp(); 1162 1163static struct modelist ModeList[] = { 1164 { "character", "Disable LINEMODE option", docharmode, 1 }, 1165#ifdef KLUDGELINEMODE 1166 { "", "(or disable obsolete line-by-line mode)", 0 }, 1167#endif 1168 { "line", "Enable LINEMODE option", dolinemode, 1 }, 1169#ifdef KLUDGELINEMODE 1170 { "", "(or enable obsolete line-by-line mode)", 0 }, 1171#endif 1172 { "", "", 0 }, 1173 { "", "These require the LINEMODE option to be enabled", 0 }, 1174 { "isig", "Enable signal trapping", setmode, 1, MODE_TRAPSIG }, 1175 { "+isig", 0, setmode, 1, MODE_TRAPSIG }, 1176 { "-isig", "Disable signal trapping", clearmode, 1, MODE_TRAPSIG }, 1177 { "edit", "Enable character editing", setmode, 1, MODE_EDIT }, 1178 { "+edit", 0, setmode, 1, MODE_EDIT }, 1179 { "-edit", "Disable character editing", clearmode, 1, MODE_EDIT }, 1180 { "softtabs", "Enable tab expansion", setmode, 1, MODE_SOFT_TAB }, 1181 { "+softtabs", 0, setmode, 1, MODE_SOFT_TAB }, 1182 { "-softtabs", "Disable character editing", clearmode, 1, MODE_SOFT_TAB }, 1183 { "litecho", "Enable literal character echo", setmode, 1, MODE_LIT_ECHO }, 1184 { "+litecho", 0, setmode, 1, MODE_LIT_ECHO }, 1185 { "-litecho", "Disable literal character echo", clearmode, 1, MODE_LIT_ECHO }, 1186 { "help", 0, modehelp, 0 }, 1187#ifdef KLUDGELINEMODE 1188 { "kludgeline", 0, dokludgemode, 1 }, 1189#endif 1190 { "", "", 0 }, 1191 { "?", "Print help information", modehelp, 0 }, 1192 { 0 }, 1193}; 1194 1195 1196 int 1197modehelp() 1198{ 1199 struct modelist *mt; 1200 1201 printf("format is: 'mode Mode', where 'Mode' is one of:\n\n"); 1202 for (mt = ModeList; mt->name; mt++) { 1203 if (mt->help) { 1204 if (*mt->help) 1205 printf("%-15s %s\n", mt->name, mt->help); 1206 else 1207 printf("\n"); 1208 } 1209 } 1210 return 0; 1211} 1212 1213#define GETMODECMD(name) (struct modelist *) \ 1214 genget(name, (char **) ModeList, sizeof(struct modelist)) 1215 1216 static int 1217modecmd(argc, argv) 1218 int argc; 1219 char *argv[]; 1220{ 1221 struct modelist *mt; 1222 1223 if (argc != 2) { 1224 printf("'mode' command requires an argument\n"); 1225 printf("'mode ?' for help.\n"); 1226 } else if ((mt = GETMODECMD(argv[1])) == 0) { 1227 fprintf(stderr, "Unknown mode '%s' ('mode ?' for help).\n", argv[1]); 1228 } else if (Ambiguous(mt)) { 1229 fprintf(stderr, "Ambiguous mode '%s' ('mode ?' for help).\n", argv[1]); 1230 } else if (mt->needconnect && !connected) { 1231 printf("?Need to be connected first.\n"); 1232 printf("'mode ?' for help.\n"); 1233 } else if (mt->handler) { 1234 return (*mt->handler)(mt->arg1); 1235 } 1236 return 0; 1237} 1238 1239/* 1240 * The following data structures and routines implement the 1241 * "display" command. 1242 */ 1243 1244 static int 1245display(argc, argv) 1246 int argc; 1247 char *argv[]; 1248{ 1249 struct togglelist *tl; 1250 struct setlist *sl; 1251 1252#define dotog(tl) if (tl->variable && tl->actionexplanation) { \ 1253 if (*tl->variable) { \ 1254 printf("will"); \ 1255 } else { \ 1256 printf("won't"); \ 1257 } \ 1258 printf(" %s.\n", tl->actionexplanation); \ 1259 } 1260 1261#define doset(sl) if (sl->name && *sl->name != ' ') { \ 1262 if (sl->handler == 0) \ 1263 printf("%-15s [%s]\n", sl->name, control(*sl->charp)); \ 1264 else \ 1265 printf("%-15s \"%s\"\n", sl->name, (char *)sl->charp); \ 1266 } 1267 1268 if (argc == 1) { 1269 for (tl = Togglelist; tl->name; tl++) { 1270 dotog(tl); 1271 } 1272 printf("\n"); 1273 for (sl = Setlist; sl->name; sl++) { 1274 doset(sl); 1275 } 1276 } else { 1277 int i; 1278 1279 for (i = 1; i < argc; i++) { 1280 sl = getset(argv[i]); 1281 tl = GETTOGGLE(argv[i]); 1282 if (Ambiguous(sl) || Ambiguous(tl)) { 1283 printf("?Ambiguous argument '%s'.\n", argv[i]); 1284 return 0; 1285 } else if (!sl && !tl) { 1286 printf("?Unknown argument '%s'.\n", argv[i]); 1287 return 0; 1288 } else { 1289 if (tl) { 1290 dotog(tl); 1291 } 1292 if (sl) { 1293 doset(sl); 1294 } 1295 } 1296 } 1297 } 1298/*@*/optionstatus(); 1299#ifdef ENCRYPTION 1300 EncryptStatus(); 1301#endif /* ENCRYPTION */ 1302 return 1; 1303#undef doset 1304#undef dotog 1305} 1306 1307/* 1308 * The following are the data structures, and many of the routines, 1309 * relating to command processing. 1310 */ 1311 1312/* 1313 * Set the escape character. 1314 */ 1315 static int 1316setescape(argc, argv) 1317 int argc; 1318 char *argv[]; 1319{ 1320 register char *arg; 1321 char buf[50]; 1322 1323 printf( 1324 "Deprecated usage - please use 'set escape%s%s' in the future.\n", 1325 (argc > 2)? " ":"", (argc > 2)? argv[1]: ""); 1326 if (argc > 2) 1327 arg = argv[1]; 1328 else { 1329 printf("new escape character: "); 1330 (void) fgets(buf, sizeof(buf), stdin); 1331 arg = buf; 1332 } 1333 if (arg[0] != '\0') 1334 escape = arg[0]; 1335 if (!In3270) { 1336 printf("Escape character is '%s'.\n", control(escape)); 1337 } 1338 (void) fflush(stdout); 1339 return 1; 1340} 1341 1342 /*VARARGS*/ 1343 static int 1344togcrmod() 1345{ 1346 crmod = !crmod; 1347 printf("Deprecated usage - please use 'toggle crmod' in the future.\n"); 1348 printf("%s map carriage return on output.\n", crmod ? "Will" : "Won't"); 1349 (void) fflush(stdout); 1350 return 1; 1351} 1352 1353 /*VARARGS*/ 1354 int 1355suspend() 1356{ 1357#ifdef SIGTSTP 1358 setcommandmode(); 1359 { 1360 long oldrows, oldcols, newrows, newcols, err; 1361 1362 err = (TerminalWindowSize(&oldrows, &oldcols) == 0) ? 1 : 0; 1363 (void) kill(0, SIGTSTP); 1364 /* 1365 * If we didn't get the window size before the SUSPEND, but we 1366 * can get them now (?), then send the NAWS to make sure that 1367 * we are set up for the right window size. 1368 */ 1369 if (TerminalWindowSize(&newrows, &newcols) && connected && 1370 (err || ((oldrows != newrows) || (oldcols != newcols)))) { 1371 sendnaws(); 1372 } 1373 } 1374 /* reget parameters in case they were changed */ 1375 TerminalSaveState(); 1376 setconnmode(0); 1377#else 1378 printf("Suspend is not supported. Try the '!' command instead\n"); 1379#endif 1380 return 1; 1381} 1382 1383#if !defined(TN3270) 1384 /*ARGSUSED*/ 1385 int 1386shell(argc, argv) 1387 int argc; 1388 char *argv[]; 1389{ 1390 long oldrows, oldcols, newrows, newcols, err; 1391 1392 setcommandmode(); 1393 1394 err = (TerminalWindowSize(&oldrows, &oldcols) == 0) ? 1 : 0; 1395 switch(vfork()) { 1396 case -1: 1397 perror("Fork failed\n"); 1398 break; 1399 1400 case 0: 1401 { 1402 /* 1403 * Fire up the shell in the child. 1404 */ 1405 register char *shellp, *shellname; 1406 extern char *strrchr(); 1407 1408 shellp = getenv("SHELL"); 1409 if (shellp == NULL) 1410 shellp = "/bin/sh"; 1411 if ((shellname = strrchr(shellp, '/')) == 0) 1412 shellname = shellp; 1413 else 1414 shellname++; 1415 if (argc > 1) 1416 execl(shellp, shellname, "-c", &saveline[1], 0); 1417 else 1418 execl(shellp, shellname, 0); 1419 perror("Execl"); 1420 _exit(1); 1421 } 1422 default: 1423 (void)wait((int *)0); /* Wait for the shell to complete */ 1424 1425 if (TerminalWindowSize(&newrows, &newcols) && connected && 1426 (err || ((oldrows != newrows) || (oldcols != newcols)))) { 1427 sendnaws(); 1428 } 1429 break; 1430 } 1431 return 1; 1432} 1433#else /* !defined(TN3270) */ 1434extern int shell(); 1435#endif /* !defined(TN3270) */ 1436 1437 /*VARARGS*/ 1438 static 1439bye(argc, argv) 1440 int argc; /* Number of arguments */ 1441 char *argv[]; /* arguments */ 1442{ 1443 extern int resettermname; 1444 1445 if (connected) { 1446 (void) shutdown(net, 2); 1447 printf("Connection closed.\n"); 1448 (void) NetClose(net); 1449 connected = 0; 1450 resettermname = 1; 1451#if defined(AUTHENTICATION) || defined(ENCRYPTION) 1452 auth_encrypt_connect(connected); 1453#endif /* defined(AUTHENTICATION) || defined(ENCRYPTION) */ 1454 /* reset options */ 1455 tninit(); 1456#if defined(TN3270) 1457 SetIn3270(); /* Get out of 3270 mode */ 1458#endif /* defined(TN3270) */ 1459 } 1460 if ((argc != 2) || (strcmp(argv[1], "fromquit") != 0)) { 1461 longjmp(toplevel, 1); 1462 /* NOTREACHED */ 1463 } 1464 return 1; /* Keep lint, etc., happy */ 1465} 1466 1467/*VARARGS*/ 1468quit() 1469{ 1470 (void) call(bye, "bye", "fromquit", 0); 1471 Exit(0); 1472 /*NOTREACHED*/ 1473} 1474 1475/*VARARGS*/ 1476 int 1477logout() 1478{ 1479 send_do(TELOPT_LOGOUT, 1); 1480 (void) netflush(); 1481 return 1; 1482} 1483 1484 1485/* 1486 * The SLC command. 1487 */ 1488 1489struct slclist { 1490 char *name; 1491 char *help; 1492 void (*handler)(); 1493 int arg; 1494}; 1495 1496static void slc_help(); 1497 1498struct slclist SlcList[] = { 1499 { "export", "Use local special character definitions", 1500 slc_mode_export, 0 }, 1501 { "import", "Use remote special character definitions", 1502 slc_mode_import, 1 }, 1503 { "check", "Verify remote special character definitions", 1504 slc_mode_import, 0 }, 1505 { "help", 0, slc_help, 0 }, 1506 { "?", "Print help information", slc_help, 0 }, 1507 { 0 }, 1508}; 1509 1510 static void 1511slc_help() 1512{ 1513 struct slclist *c; 1514 1515 for (c = SlcList; c->name; c++) { 1516 if (c->help) { 1517 if (*c->help) 1518 printf("%-15s %s\n", c->name, c->help); 1519 else 1520 printf("\n"); 1521 } 1522 } 1523} 1524 1525 static struct slclist * 1526getslc(name) 1527 char *name; 1528{ 1529 return (struct slclist *) 1530 genget(name, (char **) SlcList, sizeof(struct slclist)); 1531} 1532 1533 static 1534slccmd(argc, argv) 1535 int argc; 1536 char *argv[]; 1537{ 1538 struct slclist *c; 1539 1540 if (argc != 2) { 1541 fprintf(stderr, 1542 "Need an argument to 'slc' command. 'slc ?' for help.\n"); 1543 return 0; 1544 } 1545 c = getslc(argv[1]); 1546 if (c == 0) { 1547 fprintf(stderr, "'%s': unknown argument ('slc ?' for help).\n", 1548 argv[1]); 1549 return 0; 1550 } 1551 if (Ambiguous(c)) { 1552 fprintf(stderr, "'%s': ambiguous argument ('slc ?' for help).\n", 1553 argv[1]); 1554 return 0; 1555 } 1556 (*c->handler)(c->arg); 1557 slcstate(); 1558 return 1; 1559} 1560 1561/* 1562 * The ENVIRON command. 1563 */ 1564 1565struct envlist { 1566 char *name; 1567 char *help; 1568 void (*handler)(); 1569 int narg; 1570}; 1571 1572extern struct env_lst * 1573 env_define P((unsigned char *, unsigned char *)); 1574extern void 1575 env_undefine P((unsigned char *)), 1576 env_export P((unsigned char *)), 1577 env_unexport P((unsigned char *)), 1578 env_send P((unsigned char *)), 1579#if defined(OLD_ENVIRON) && defined(ENV_HACK) 1580 env_varval P((unsigned char *)), 1581#endif 1582 env_list P((void)); 1583static void 1584 env_help P((void)); 1585 1586struct envlist EnvList[] = { 1587 { "define", "Define an environment variable", 1588 (void (*)())env_define, 2 }, 1589 { "undefine", "Undefine an environment variable", 1590 env_undefine, 1 }, 1591 { "export", "Mark an environment variable for automatic export", 1592 env_export, 1 }, 1593 { "unexport", "Don't mark an environment variable for automatic export", 1594 env_unexport, 1 }, 1595 { "send", "Send an environment variable", env_send, 1 }, 1596 { "list", "List the current environment variables", 1597 env_list, 0 }, 1598#if defined(OLD_ENVIRON) && defined(ENV_HACK) 1599 { "varval", "Reverse VAR and VALUE (auto, right, wrong, status)", 1600 env_varval, 1 }, 1601#endif 1602 { "help", 0, env_help, 0 }, 1603 { "?", "Print help information", env_help, 0 }, 1604 { 0 }, 1605}; 1606 1607 static void 1608env_help() 1609{ 1610 struct envlist *c; 1611 1612 for (c = EnvList; c->name; c++) { 1613 if (c->help) { 1614 if (*c->help) 1615 printf("%-15s %s\n", c->name, c->help); 1616 else 1617 printf("\n"); 1618 } 1619 } 1620} 1621 1622 static struct envlist * 1623getenvcmd(name) 1624 char *name; 1625{ 1626 return (struct envlist *) 1627 genget(name, (char **) EnvList, sizeof(struct envlist)); 1628} 1629 1630env_cmd(argc, argv) 1631 int argc; 1632 char *argv[]; 1633{ 1634 struct envlist *c; 1635 1636 if (argc < 2) { 1637 fprintf(stderr, 1638 "Need an argument to 'environ' command. 'environ ?' for help.\n"); 1639 return 0; 1640 } 1641 c = getenvcmd(argv[1]); 1642 if (c == 0) { 1643 fprintf(stderr, "'%s': unknown argument ('environ ?' for help).\n", 1644 argv[1]); 1645 return 0; 1646 } 1647 if (Ambiguous(c)) { 1648 fprintf(stderr, "'%s': ambiguous argument ('environ ?' for help).\n", 1649 argv[1]); 1650 return 0; 1651 } 1652 if (c->narg + 2 != argc) { 1653 fprintf(stderr, 1654 "Need %s%d argument%s to 'environ %s' command. 'environ ?' for help.\n", 1655 c->narg < argc + 2 ? "only " : "", 1656 c->narg, c->narg == 1 ? "" : "s", c->name); 1657 return 0; 1658 } 1659 (*c->handler)(argv[2], argv[3]); 1660 return 1; 1661} 1662 1663struct env_lst { 1664 struct env_lst *next; /* pointer to next structure */ 1665 struct env_lst *prev; /* pointer to previous structure */ 1666 unsigned char *var; /* pointer to variable name */ 1667 unsigned char *value; /* pointer to variable value */ 1668 int export; /* 1 -> export with default list of variables */ 1669 int welldefined; /* A well defined variable */ 1670}; 1671 1672struct env_lst envlisthead; 1673 1674 struct env_lst * 1675env_find(var) 1676 unsigned char *var; 1677{ 1678 register struct env_lst *ep; 1679 1680 for (ep = envlisthead.next; ep; ep = ep->next) { 1681 if (strcmp((char *)ep->var, (char *)var) == 0) 1682 return(ep); 1683 } 1684 return(NULL); 1685} 1686 1687 void 1688env_init() 1689{ 1690 extern char **environ; 1691 register char **epp, *cp; 1692 register struct env_lst *ep; 1693 extern char *strchr(); 1694 1695 for (epp = environ; *epp; epp++) { 1696 if (cp = strchr(*epp, '=')) { 1697 *cp = '\0'; 1698 ep = env_define((unsigned char *)*epp, 1699 (unsigned char *)cp+1); 1700 ep->export = 0; 1701 *cp = '='; 1702 } 1703 } 1704 /* 1705 * Special case for DISPLAY variable. If it is ":0.0" or 1706 * "unix:0.0", we have to get rid of "unix" and insert our 1707 * hostname. 1708 */ 1709 if ((ep = env_find("DISPLAY")) 1710 && ((*ep->value == ':') 1711 || (strncmp((char *)ep->value, "unix:", 5) == 0))) { 1712 char hbuf[256+1]; 1713 char *cp2 = strchr((char *)ep->value, ':'); 1714 1715 gethostname(hbuf, 256); 1716 hbuf[256] = '\0'; 1717 cp = (char *)malloc(strlen(hbuf) + strlen(cp2) + 1); 1718 sprintf((char *)cp, "%s%s", hbuf, cp2); 1719 free(ep->value); 1720 ep->value = (unsigned char *)cp; 1721 } 1722 /* 1723 * If USER is not defined, but LOGNAME is, then add 1724 * USER with the value from LOGNAME. By default, we 1725 * don't export the USER variable. 1726 */ 1727 if ((env_find("USER") == NULL) && (ep = env_find("LOGNAME"))) { 1728 env_define((unsigned char *)"USER", ep->value); 1729 env_unexport((unsigned char *)"USER"); 1730 } 1731 env_export((unsigned char *)"DISPLAY"); 1732 env_export((unsigned char *)"PRINTER"); 1733} 1734 1735 struct env_lst * 1736env_define(var, value) 1737 unsigned char *var, *value; 1738{ 1739 register struct env_lst *ep; 1740 1741 if (ep = env_find(var)) { 1742 if (ep->var) 1743 free(ep->var); 1744 if (ep->value) 1745 free(ep->value); 1746 } else { 1747 ep = (struct env_lst *)malloc(sizeof(struct env_lst)); 1748 ep->next = envlisthead.next; 1749 envlisthead.next = ep; 1750 ep->prev = &envlisthead; 1751 if (ep->next) 1752 ep->next->prev = ep; 1753 } 1754 ep->welldefined = opt_welldefined(var); 1755 ep->export = 1; 1756 ep->var = (unsigned char *)strdup((char *)var); 1757 ep->value = (unsigned char *)strdup((char *)value); 1758 return(ep); 1759} 1760 1761 void 1762env_undefine(var) 1763 unsigned char *var; 1764{ 1765 register struct env_lst *ep; 1766 1767 if (ep = env_find(var)) { 1768 ep->prev->next = ep->next; 1769 if (ep->next) 1770 ep->next->prev = ep->prev; 1771 if (ep->var) 1772 free(ep->var); 1773 if (ep->value) 1774 free(ep->value); 1775 free(ep); 1776 } 1777} 1778 1779 void 1780env_export(var) 1781 unsigned char *var; 1782{ 1783 register struct env_lst *ep; 1784 1785 if (ep = env_find(var)) 1786 ep->export = 1; 1787} 1788 1789 void 1790env_unexport(var) 1791 unsigned char *var; 1792{ 1793 register struct env_lst *ep; 1794 1795 if (ep = env_find(var)) 1796 ep->export = 0; 1797} 1798 1799 void 1800env_send(var) 1801 unsigned char *var; 1802{ 1803 register struct env_lst *ep; 1804 1805 if (my_state_is_wont(TELOPT_NEW_ENVIRON) 1806#ifdef OLD_ENVIRON 1807 && my_state_is_wont(TELOPT_OLD_ENVIRON) 1808#endif 1809 ) { 1810 fprintf(stderr, 1811 "Cannot send '%s': Telnet ENVIRON option not enabled\n", 1812 var); 1813 return; 1814 } 1815 ep = env_find(var); 1816 if (ep == 0) { 1817 fprintf(stderr, "Cannot send '%s': variable not defined\n", 1818 var); 1819 return; 1820 } 1821 env_opt_start_info(); 1822 env_opt_add(ep->var); 1823 env_opt_end(0); 1824} 1825 1826 void 1827env_list() 1828{ 1829 register struct env_lst *ep; 1830 1831 for (ep = envlisthead.next; ep; ep = ep->next) { 1832 printf("%c %-20s %s\n", ep->export ? '*' : ' ', 1833 ep->var, ep->value); 1834 } 1835} 1836 1837 unsigned char * 1838env_default(init, welldefined) 1839 int init; 1840{ 1841 static struct env_lst *nep = NULL; 1842 1843 if (init) { 1844 nep = &envlisthead; 1845 return; 1846 } 1847 if (nep) { 1848 while (nep = nep->next) { 1849 if (nep->export && (nep->welldefined == welldefined)) 1850 return(nep->var); 1851 } 1852 } 1853 return(NULL); 1854} 1855 1856 unsigned char * 1857env_getvalue(var) 1858 unsigned char *var; 1859{ 1860 register struct env_lst *ep; 1861 1862 if (ep = env_find(var)) 1863 return(ep->value); 1864 return(NULL); 1865} 1866 1867#if defined(OLD_ENVIRON) && defined(ENV_HACK) 1868 void 1869env_varval(what) 1870 unsigned char *what; 1871{ 1872 extern int old_env_var, old_env_value, env_auto; 1873 int len = strlen((char *)what); 1874 1875 if (len == 0) 1876 goto unknown; 1877 1878 if (strncasecmp((char *)what, "status", len) == 0) { 1879 if (env_auto) 1880 printf("%s%s", "VAR and VALUE are/will be ", 1881 "determined automatically\n"); 1882 if (old_env_var == OLD_ENV_VAR) 1883 printf("VAR and VALUE set to correct definitions\n"); 1884 else 1885 printf("VAR and VALUE definitions are reversed\n"); 1886 } else if (strncasecmp((char *)what, "auto", len) == 0) { 1887 env_auto = 1; 1888 old_env_var = OLD_ENV_VALUE; 1889 old_env_value = OLD_ENV_VAR; 1890 } else if (strncasecmp((char *)what, "right", len) == 0) { 1891 env_auto = 0; 1892 old_env_var = OLD_ENV_VAR; 1893 old_env_value = OLD_ENV_VALUE; 1894 } else if (strncasecmp((char *)what, "wrong", len) == 0) { 1895 env_auto = 0; 1896 old_env_var = OLD_ENV_VALUE; 1897 old_env_value = OLD_ENV_VAR; 1898 } else { 1899unknown: 1900 printf("Unknown \"varval\" command. (\"auto\", \"right\", \"wrong\", \"status\")\n"); 1901 } 1902} 1903#endif 1904 1905#if defined(AUTHENTICATION) 1906/* 1907 * The AUTHENTICATE command. 1908 */ 1909 1910struct authlist { 1911 char *name; 1912 char *help; 1913 int (*handler)(); 1914 int narg; 1915}; 1916 1917extern int 1918 auth_enable P((char *)), 1919 auth_disable P((char *)), 1920 auth_status P((void)); 1921static int 1922 auth_help P((void)); 1923 1924struct authlist AuthList[] = { 1925 { "status", "Display current status of authentication information", 1926 auth_status, 0 }, 1927 { "disable", "Disable an authentication type ('auth disable ?' for more)", 1928 auth_disable, 1 }, 1929 { "enable", "Enable an authentication type ('auth enable ?' for more)", 1930 auth_enable, 1 }, 1931 { "help", 0, auth_help, 0 }, 1932 { "?", "Print help information", auth_help, 0 }, 1933 { 0 }, 1934}; 1935 1936 static int 1937auth_help() 1938{ 1939 struct authlist *c; 1940 1941 for (c = AuthList; c->name; c++) { 1942 if (c->help) { 1943 if (*c->help) 1944 printf("%-15s %s\n", c->name, c->help); 1945 else 1946 printf("\n"); 1947 } 1948 } 1949 return 0; 1950} 1951 1952auth_cmd(argc, argv) 1953 int argc; 1954 char *argv[]; 1955{ 1956 struct authlist *c; 1957 1958 if (argc < 2) { 1959 fprintf(stderr, 1960 "Need an argument to 'auth' command. 'auth ?' for help.\n"); 1961 return 0; 1962 } 1963 1964 c = (struct authlist *) 1965 genget(argv[1], (char **) AuthList, sizeof(struct authlist)); 1966 if (c == 0) { 1967 fprintf(stderr, "'%s': unknown argument ('auth ?' for help).\n", 1968 argv[1]); 1969 return 0; 1970 } 1971 if (Ambiguous(c)) { 1972 fprintf(stderr, "'%s': ambiguous argument ('auth ?' for help).\n", 1973 argv[1]); 1974 return 0; 1975 } 1976 if (c->narg + 2 != argc) { 1977 fprintf(stderr, 1978 "Need %s%d argument%s to 'auth %s' command. 'auth ?' for help.\n", 1979 c->narg < argc + 2 ? "only " : "", 1980 c->narg, c->narg == 1 ? "" : "s", c->name); 1981 return 0; 1982 } 1983 return((*c->handler)(argv[2], argv[3])); 1984} 1985#endif 1986 1987#ifdef ENCRYPTION 1988/* 1989 * The ENCRYPT command. 1990 */ 1991 1992struct encryptlist { 1993 char *name; 1994 char *help; 1995 int (*handler)(); 1996 int needconnect; 1997 int minarg; 1998 int maxarg; 1999}; 2000 2001extern int 2002 EncryptEnable P((char *, char *)), 2003 EncryptDisable P((char *, char *)), 2004 EncryptType P((char *, char *)), 2005 EncryptStart P((char *)), 2006 EncryptStartInput P((void)), 2007 EncryptStartOutput P((void)), 2008 EncryptStop P((char *)), 2009 EncryptStopInput P((void)), 2010 EncryptStopOutput P((void)), 2011 EncryptStatus P((void)); 2012static int 2013 EncryptHelp P((void)); 2014 2015struct encryptlist EncryptList[] = { 2016 { "enable", "Enable encryption. ('encrypt enable ?' for more)", 2017 EncryptEnable, 1, 1, 2 }, 2018 { "disable", "Disable encryption. ('encrypt enable ?' for more)", 2019 EncryptDisable, 0, 1, 2 }, 2020 { "type", "Set encryption type. ('encrypt type ?' for more)", 2021 EncryptType, 0, 1, 1 }, 2022 { "start", "Start encryption. ('encrypt start ?' for more)", 2023 EncryptStart, 1, 0, 1 }, 2024 { "stop", "Stop encryption. ('encrypt stop ?' for more)", 2025 EncryptStop, 1, 0, 1 }, 2026 { "input", "Start encrypting the input stream", 2027 EncryptStartInput, 1, 0, 0 }, 2028 { "-input", "Stop encrypting the input stream", 2029 EncryptStopInput, 1, 0, 0 }, 2030 { "output", "Start encrypting the output stream", 2031 EncryptStartOutput, 1, 0, 0 }, 2032 { "-output", "Stop encrypting the output stream", 2033 EncryptStopOutput, 1, 0, 0 }, 2034 2035 { "status", "Display current status of authentication information", 2036 EncryptStatus, 0, 0, 0 }, 2037 { "help", 0, EncryptHelp, 0, 0, 0 }, 2038 { "?", "Print help information", EncryptHelp, 0, 0, 0 }, 2039 { 0 }, 2040}; 2041 2042 static int 2043EncryptHelp() 2044{ 2045 struct encryptlist *c; 2046 2047 for (c = EncryptList; c->name; c++) { 2048 if (c->help) { 2049 if (*c->help) 2050 printf("%-15s %s\n", c->name, c->help); 2051 else 2052 printf("\n"); 2053 } 2054 } 2055 return 0; 2056} 2057 2058encrypt_cmd(argc, argv) 2059 int argc; 2060 char *argv[]; 2061{ 2062 struct encryptlist *c; 2063 2064 if (argc < 2) { 2065 fprintf(stderr, 2066 "Need an argument to 'encrypt' command. 'encrypt ?' for help.\n"); 2067 return 0; 2068 } 2069 2070 c = (struct encryptlist *) 2071 genget(argv[1], (char **) EncryptList, sizeof(struct encryptlist)); 2072 if (c == 0) { 2073 fprintf(stderr, "'%s': unknown argument ('encrypt ?' for help).\n", 2074 argv[1]); 2075 return 0; 2076 } 2077 if (Ambiguous(c)) { 2078 fprintf(stderr, "'%s': ambiguous argument ('encrypt ?' for help).\n", 2079 argv[1]); 2080 return 0; 2081 } 2082 argc -= 2; 2083 if (argc < c->minarg || argc > c->maxarg) { 2084 if (c->minarg == c->maxarg) { 2085 fprintf(stderr, "Need %s%d argument%s ", 2086 c->minarg < argc ? "only " : "", c->minarg, 2087 c->minarg == 1 ? "" : "s"); 2088 } else { 2089 fprintf(stderr, "Need %s%d-%d arguments ", 2090 c->maxarg < argc ? "only " : "", c->minarg, c->maxarg); 2091 } 2092 fprintf(stderr, "to 'encrypt %s' command. 'encrypt ?' for help.\n", 2093 c->name); 2094 return 0; 2095 } 2096 if (c->needconnect && !connected) { 2097 if (!(argc && (isprefix(argv[2], "help") || isprefix(argv[2], "?")))) { 2098 printf("?Need to be connected first.\n"); 2099 return 0; 2100 } 2101 } 2102 return ((*c->handler)(argc > 0 ? argv[2] : 0, 2103 argc > 1 ? argv[3] : 0, 2104 argc > 2 ? argv[4] : 0)); 2105} 2106#endif /* ENCRYPTION */ 2107 2108#if defined(unix) && defined(TN3270) 2109 static void 2110filestuff(fd) 2111 int fd; 2112{ 2113 int res; 2114 2115#ifdef F_GETOWN 2116 setconnmode(0); 2117 res = fcntl(fd, F_GETOWN, 0); 2118 setcommandmode(); 2119 2120 if (res == -1) { 2121 perror("fcntl"); 2122 return; 2123 } 2124 printf("\tOwner is %d.\n", res); 2125#endif 2126 2127 setconnmode(0); 2128 res = fcntl(fd, F_GETFL, 0); 2129 setcommandmode(); 2130 2131 if (res == -1) { 2132 perror("fcntl"); 2133 return; 2134 } 2135#ifdef notdef 2136 printf("\tFlags are 0x%x: %s\n", res, decodeflags(res)); 2137#endif 2138} 2139#endif /* defined(unix) && defined(TN3270) */ 2140 2141/* 2142 * Print status about the connection. 2143 */ 2144 /*ARGSUSED*/ 2145 static 2146status(argc, argv) 2147 int argc; 2148 char *argv[]; 2149{ 2150 if (connected) { 2151 printf("Connected to %s.\n", hostname); 2152 if ((argc < 2) || strcmp(argv[1], "notmuch")) { 2153 int mode = getconnmode(); 2154 2155 if (my_want_state_is_will(TELOPT_LINEMODE)) { 2156 printf("Operating with LINEMODE option\n"); 2157 printf("%s line editing\n", (mode&MODE_EDIT) ? "Local" : "No"); 2158 printf("%s catching of signals\n", 2159 (mode&MODE_TRAPSIG) ? "Local" : "No"); 2160 slcstate(); 2161#ifdef KLUDGELINEMODE 2162 } else if (kludgelinemode && my_want_state_is_dont(TELOPT_SGA)) { 2163 printf("Operating in obsolete linemode\n"); 2164#endif 2165 } else { 2166 printf("Operating in single character mode\n"); 2167 if (localchars) 2168 printf("Catching signals locally\n"); 2169 } 2170 printf("%s character echo\n", (mode&MODE_ECHO) ? "Local" : "Remote"); 2171 if (my_want_state_is_will(TELOPT_LFLOW)) 2172 printf("%s flow control\n", (mode&MODE_FLOW) ? "Local" : "No"); 2173#ifdef ENCRYPTION 2174 encrypt_display(); 2175#endif /* ENCRYPTION */ 2176 } 2177 } else { 2178 printf("No connection.\n"); 2179 } 2180# if !defined(TN3270) 2181 printf("Escape character is '%s'.\n", control(escape)); 2182 (void) fflush(stdout); 2183# else /* !defined(TN3270) */ 2184 if ((!In3270) && ((argc < 2) || strcmp(argv[1], "notmuch"))) { 2185 printf("Escape character is '%s'.\n", control(escape)); 2186 } 2187# if defined(unix) 2188 if ((argc >= 2) && !strcmp(argv[1], "everything")) { 2189 printf("SIGIO received %d time%s.\n", 2190 sigiocount, (sigiocount == 1)? "":"s"); 2191 if (In3270) { 2192 printf("Process ID %d, process group %d.\n", 2193 getpid(), getpgrp(getpid())); 2194 printf("Terminal input:\n"); 2195 filestuff(tin); 2196 printf("Terminal output:\n"); 2197 filestuff(tout); 2198 printf("Network socket:\n"); 2199 filestuff(net); 2200 } 2201 } 2202 if (In3270 && transcom) { 2203 printf("Transparent mode command is '%s'.\n", transcom); 2204 } 2205# endif /* defined(unix) */ 2206 (void) fflush(stdout); 2207 if (In3270) { 2208 return 0; 2209 } 2210# endif /* defined(TN3270) */ 2211 return 1; 2212} 2213 2214#ifdef SIGINFO 2215/* 2216 * Function that gets called when SIGINFO is received. 2217 */ 2218ayt_status() 2219{ 2220 (void) call(status, "status", "notmuch", 0); 2221} 2222#endif 2223 2224unsigned long inet_addr(); 2225 2226 int 2227tn(argc, argv) 2228 int argc; 2229 char *argv[]; 2230{ 2231 register struct hostent *host = 0; 2232 struct sockaddr_in sin; 2233 struct servent *sp = 0; 2234 unsigned long temp; 2235 extern char *inet_ntoa(); 2236#if defined(IP_OPTIONS) && defined(IPPROTO_IP) 2237 char *srp = 0, *strrchr(); 2238 unsigned long sourceroute(), srlen; 2239#endif 2240 char *cmd, *hostp = 0, *portp = 0, *user = 0; 2241 2242 /* clear the socket address prior to use */ 2243 memset((char *)&sin, 0, sizeof(sin)); 2244 2245 if (connected) { 2246 printf("?Already connected to %s\n", hostname); 2247 setuid(getuid()); 2248 return 0; 2249 } 2250 if (argc < 2) { 2251 (void) strcpy(line, "open "); 2252 printf("(to) "); 2253 (void) fgets(&line[strlen(line)], sizeof(line) - strlen(line), stdin); 2254 makeargv(); 2255 argc = margc; 2256 argv = margv; 2257 } 2258 cmd = *argv; 2259 --argc; ++argv; 2260 while (argc) { 2261 if (strcmp(*argv, "help") == 0 || isprefix(*argv, "?")) 2262 goto usage; 2263 if (strcmp(*argv, "-l") == 0) { 2264 --argc; ++argv; 2265 if (argc == 0) 2266 goto usage; 2267 user = *argv++; 2268 --argc; 2269 continue; 2270 } 2271 if (strcmp(*argv, "-a") == 0) { 2272 --argc; ++argv; 2273 autologin = 1; 2274 continue; 2275 } 2276 if (hostp == 0) { 2277 hostp = *argv++; 2278 --argc; 2279 continue; 2280 } 2281 if (portp == 0) { 2282 portp = *argv++; 2283 --argc; 2284 continue; 2285 } 2286 usage: 2287 printf("usage: %s [-l user] [-a] host-name [port]\n", cmd); 2288 setuid(getuid()); 2289 return 0; 2290 } 2291 if (hostp == 0) 2292 goto usage; 2293 2294#if defined(IP_OPTIONS) && defined(IPPROTO_IP) 2295 if (hostp[0] == '@' || hostp[0] == '!') { 2296 if ((hostname = strrchr(hostp, ':')) == NULL) 2297 hostname = strrchr(hostp, '@'); 2298 hostname++; 2299 srp = 0; 2300 temp = sourceroute(hostp, &srp, &srlen); 2301 if (temp == 0) { 2302 herror(srp); 2303 setuid(getuid()); 2304 return 0; 2305 } else if (temp == -1) { 2306 printf("Bad source route option: %s\n", hostp); 2307 setuid(getuid()); 2308 return 0; 2309 } else { 2310 sin.sin_addr.s_addr = temp; 2311 sin.sin_family = AF_INET; 2312 } 2313 } else { 2314#endif 2315 temp = inet_addr(hostp); 2316 if (temp != (unsigned long) -1) { 2317 sin.sin_addr.s_addr = temp; 2318 sin.sin_family = AF_INET; 2319 (void) strcpy(_hostname, hostp); 2320 hostname = _hostname; 2321 } else { 2322 host = gethostbyname(hostp); 2323 if (host) { 2324 sin.sin_family = host->h_addrtype; 2325#if defined(h_addr) /* In 4.3, this is a #define */ 2326 memmove((caddr_t)&sin.sin_addr, 2327 host->h_addr_list[0], host->h_length); 2328#else /* defined(h_addr) */ 2329 memmove((caddr_t)&sin.sin_addr, host->h_addr, host->h_length); 2330#endif /* defined(h_addr) */ 2331 strncpy(_hostname, host->h_name, sizeof(_hostname)); 2332 _hostname[sizeof(_hostname)-1] = '\0'; 2333 hostname = _hostname; 2334 } else { 2335 herror(hostp); 2336 setuid(getuid()); 2337 return 0; 2338 } 2339 } 2340#if defined(IP_OPTIONS) && defined(IPPROTO_IP) 2341 } 2342#endif 2343 if (portp) { 2344 if (*portp == '-') { 2345 portp++; 2346 telnetport = 1; 2347 } else 2348 telnetport = 0; 2349 sin.sin_port = atoi(portp); 2350 if (sin.sin_port == 0) { 2351 sp = getservbyname(portp, "tcp"); 2352 if (sp) 2353 sin.sin_port = sp->s_port; 2354 else { 2355 printf("%s: bad port number\n", portp); 2356 setuid(getuid()); 2357 return 0; 2358 } 2359 } else { 2360#if !defined(htons) 2361 u_short htons P((unsigned short)); 2362#endif /* !defined(htons) */ 2363 sin.sin_port = htons(sin.sin_port); 2364 } 2365 } else { 2366 if (sp == 0) { 2367 sp = getservbyname("telnet", "tcp"); 2368 if (sp == 0) { 2369 fprintf(stderr, "telnet: tcp/telnet: unknown service\n"); 2370 setuid(getuid()); 2371 return 0; 2372 } 2373 sin.sin_port = sp->s_port; 2374 } 2375 telnetport = 1; 2376 } 2377 printf("Trying %s...\n", inet_ntoa(sin.sin_addr)); 2378 do { 2379 net = socket(AF_INET, SOCK_STREAM, 0); 2380 setuid(getuid()); 2381 if (net < 0) { 2382 perror("telnet: socket"); 2383 return 0; 2384 } 2385#if defined(IP_OPTIONS) && defined(IPPROTO_IP) 2386 if (srp && setsockopt(net, IPPROTO_IP, IP_OPTIONS, (char *)srp, srlen) < 0) 2387 perror("setsockopt (IP_OPTIONS)"); 2388#endif 2389#if defined(IPPROTO_IP) && defined(IP_TOS) 2390 { 2391# if defined(HAS_GETTOS) 2392 struct tosent *tp; 2393 if (tos < 0 && (tp = gettosbyname("telnet", "tcp"))) 2394 tos = tp->t_tos; 2395# endif 2396 if (tos < 0) 2397 tos = 020; /* Low Delay bit */ 2398 if (tos 2399 && (setsockopt(net, IPPROTO_IP, IP_TOS, 2400 (char *)&tos, sizeof(int)) < 0) 2401 && (errno != ENOPROTOOPT)) 2402 perror("telnet: setsockopt (IP_TOS) (ignored)"); 2403 } 2404#endif /* defined(IPPROTO_IP) && defined(IP_TOS) */ 2405 2406 if (debug && SetSockOpt(net, SOL_SOCKET, SO_DEBUG, 1) < 0) { 2407 perror("setsockopt (SO_DEBUG)"); 2408 } 2409 2410 if (connect(net, (struct sockaddr *)&sin, sizeof (sin)) < 0) { 2411#if defined(h_addr) /* In 4.3, this is a #define */ 2412 if (host && host->h_addr_list[1]) { 2413 int oerrno = errno; 2414 2415 fprintf(stderr, "telnet: connect to address %s: ", 2416 inet_ntoa(sin.sin_addr)); 2417 errno = oerrno; 2418 perror((char *)0); 2419 host->h_addr_list++; 2420 memmove((caddr_t)&sin.sin_addr, 2421 host->h_addr_list[0], host->h_length); 2422 (void) NetClose(net); 2423 continue; 2424 } 2425#endif /* defined(h_addr) */ 2426 perror("telnet: Unable to connect to remote host"); 2427 return 0; 2428 } 2429 connected++; 2430#if defined(AUTHENTICATION) || defined(ENCRYPTION) 2431 auth_encrypt_connect(connected); 2432#endif /* defined(AUTHENTICATION) || defined(ENCRYPTION) */ 2433 } while (connected == 0); 2434 cmdrc(hostp, hostname); 2435 if (autologin && user == NULL) { 2436 struct passwd *pw; 2437 2438 user = getenv("USER"); 2439 if (user == NULL || 2440 (pw = getpwnam(user)) && pw->pw_uid != getuid()) { 2441 if (pw = getpwuid(getuid())) 2442 user = pw->pw_name; 2443 else 2444 user = NULL; 2445 } 2446 } 2447 if (user) { 2448 env_define((unsigned char *)"USER", (unsigned char *)user); 2449 env_export((unsigned char *)"USER"); 2450 } 2451 (void) call(status, "status", "notmuch", 0); 2452 if (setjmp(peerdied) == 0) 2453 telnet(user); 2454 (void) NetClose(net); 2455 ExitString("Connection closed by foreign host.\n",1); 2456 /*NOTREACHED*/ 2457} 2458 2459#define HELPINDENT (sizeof ("connect")) 2460 2461static char 2462 openhelp[] = "connect to a site", 2463 closehelp[] = "close current connection", 2464 logouthelp[] = "forcibly logout remote user and close the connection", 2465 quithelp[] = "exit telnet", 2466 statushelp[] = "print status information", 2467 helphelp[] = "print help information", 2468 sendhelp[] = "transmit special characters ('send ?' for more)", 2469 sethelp[] = "set operating parameters ('set ?' for more)", 2470 unsethelp[] = "unset operating parameters ('unset ?' for more)", 2471 togglestring[] ="toggle operating parameters ('toggle ?' for more)", 2472 slchelp[] = "change state of special charaters ('slc ?' for more)", 2473 displayhelp[] = "display operating parameters", 2474#if defined(TN3270) && defined(unix) 2475 transcomhelp[] = "specify Unix command for transparent mode pipe", 2476#endif /* defined(TN3270) && defined(unix) */ 2477#if defined(AUTHENTICATION) 2478 authhelp[] = "turn on (off) authentication ('auth ?' for more)", 2479#endif 2480#ifdef ENCRYPTION 2481 encrypthelp[] = "turn on (off) encryption ('encrypt ?' for more)", 2482#endif /* ENCRYPTION */ 2483#if defined(unix) 2484 zhelp[] = "suspend telnet", 2485#endif /* defined(unix) */ 2486 shellhelp[] = "invoke a subshell", 2487 envhelp[] = "change environment variables ('environ ?' for more)", 2488 modestring[] = "try to enter line or character mode ('mode ?' for more)"; 2489 2490static int help(); 2491 2492static Command cmdtab[] = { 2493 { "close", closehelp, bye, 1 }, 2494 { "logout", logouthelp, logout, 1 }, 2495 { "display", displayhelp, display, 0 }, 2496 { "mode", modestring, modecmd, 0 }, 2497 { "open", openhelp, tn, 0 }, 2498 { "quit", quithelp, quit, 0 }, 2499 { "send", sendhelp, sendcmd, 0 }, 2500 { "set", sethelp, setcmd, 0 }, 2501 { "unset", unsethelp, unsetcmd, 0 }, 2502 { "status", statushelp, status, 0 }, 2503 { "toggle", togglestring, toggle, 0 }, 2504 { "slc", slchelp, slccmd, 0 }, 2505#if defined(TN3270) && defined(unix) 2506 { "transcom", transcomhelp, settranscom, 0 }, 2507#endif /* defined(TN3270) && defined(unix) */ 2508#if defined(AUTHENTICATION) 2509 { "auth", authhelp, auth_cmd, 0 }, 2510#endif 2511#ifdef ENCRYPTION 2512 { "encrypt", encrypthelp, encrypt_cmd, 0 }, 2513#endif /* ENCRYPTION */ 2514#if defined(unix) 2515 { "z", zhelp, suspend, 0 }, 2516#endif /* defined(unix) */ 2517#if defined(TN3270) 2518 { "!", shellhelp, shell, 1 }, 2519#else 2520 { "!", shellhelp, shell, 0 }, 2521#endif 2522 { "environ", envhelp, env_cmd, 0 }, 2523 { "?", helphelp, help, 0 }, 2524 0 2525}; 2526 2527static char crmodhelp[] = "deprecated command -- use 'toggle crmod' instead"; 2528static char escapehelp[] = "deprecated command -- use 'set escape' instead"; 2529 2530static Command cmdtab2[] = { 2531 { "help", 0, help, 0 }, 2532 { "escape", escapehelp, setescape, 0 }, 2533 { "crmod", crmodhelp, togcrmod, 0 }, 2534 0 2535}; 2536 2537 2538/* 2539 * Call routine with argc, argv set from args (terminated by 0). 2540 */ 2541 2542 /*VARARGS1*/ 2543 static 2544call(va_alist) 2545 va_dcl 2546{ 2547 va_list ap; 2548 typedef int (*intrtn_t)(); 2549 intrtn_t routine; 2550 char *args[100]; 2551 int argno = 0; 2552 2553 va_start(ap); 2554 routine = (va_arg(ap, intrtn_t)); 2555 while ((args[argno++] = va_arg(ap, char *)) != 0) { 2556 ; 2557 } 2558 va_end(ap); 2559 return (*routine)(argno-1, args); 2560} 2561 2562 2563 static Command * 2564getcmd(name) 2565 char *name; 2566{ 2567 Command *cm; 2568 2569 if (cm = (Command *) genget(name, (char **) cmdtab, sizeof(Command))) 2570 return cm; 2571 return (Command *) genget(name, (char **) cmdtab2, sizeof(Command)); 2572} 2573 2574 void 2575command(top, tbuf, cnt) 2576 int top; 2577 char *tbuf; 2578 int cnt; 2579{ 2580 register Command *c; 2581 2582 setcommandmode(); 2583 if (!top) { 2584 putchar('\n'); 2585#if defined(unix) 2586 } else { 2587 (void) signal(SIGINT, SIG_DFL); 2588 (void) signal(SIGQUIT, SIG_DFL); 2589#endif /* defined(unix) */ 2590 } 2591 for (;;) { 2592 if (rlogin == _POSIX_VDISABLE) 2593 printf("%s> ", prompt); 2594 if (tbuf) { 2595 register char *cp; 2596 cp = line; 2597 while (cnt > 0 && (*cp++ = *tbuf++) != '\n') 2598 cnt--; 2599 tbuf = 0; 2600 if (cp == line || *--cp != '\n' || cp == line) 2601 goto getline; 2602 *cp = '\0'; 2603 if (rlogin == _POSIX_VDISABLE) 2604 printf("%s\n", line); 2605 } else { 2606 getline: 2607 if (rlogin != _POSIX_VDISABLE) 2608 printf("%s> ", prompt); 2609 if (fgets(line, sizeof(line), stdin) == NULL) { 2610 if (feof(stdin) || ferror(stdin)) { 2611 (void) quit(); 2612 /*NOTREACHED*/ 2613 } 2614 break; 2615 } 2616 } 2617 if (line[0] == 0) 2618 break; 2619 makeargv(); 2620 if (margv[0] == 0) { 2621 break; 2622 } 2623 c = getcmd(margv[0]); 2624 if (Ambiguous(c)) { 2625 printf("?Ambiguous command\n"); 2626 continue; 2627 } 2628 if (c == 0) { 2629 printf("?Invalid command\n"); 2630 continue; 2631 } 2632 if (c->needconnect && !connected) { 2633 printf("?Need to be connected first.\n"); 2634 continue; 2635 } 2636 if ((*c->handler)(margc, margv)) { 2637 break; 2638 } 2639 } 2640 if (!top) { 2641 if (!connected) { 2642 longjmp(toplevel, 1); 2643 /*NOTREACHED*/ 2644 } 2645#if defined(TN3270) 2646 if (shell_active == 0) { 2647 setconnmode(0); 2648 } 2649#else /* defined(TN3270) */ 2650 setconnmode(0); 2651#endif /* defined(TN3270) */ 2652 } 2653} 2654 2655/* 2656 * Help command. 2657 */ 2658 static 2659help(argc, argv) 2660 int argc; 2661 char *argv[]; 2662{ 2663 register Command *c; 2664 2665 if (argc == 1) { 2666 printf("Commands may be abbreviated. Commands are:\n\n"); 2667 for (c = cmdtab; c->name; c++) 2668 if (c->help) { 2669 printf("%-*s\t%s\n", HELPINDENT, c->name, 2670 c->help); 2671 } 2672 return 0; 2673 } 2674 while (--argc > 0) { 2675 register char *arg; 2676 arg = *++argv; 2677 c = getcmd(arg); 2678 if (Ambiguous(c)) 2679 printf("?Ambiguous help command %s\n", arg); 2680 else if (c == (Command *)0) 2681 printf("?Invalid help command %s\n", arg); 2682 else 2683 printf("%s\n", c->help); 2684 } 2685 return 0; 2686} 2687 2688static char *rcname = 0; 2689static char rcbuf[128]; 2690 2691cmdrc(m1, m2) 2692 char *m1, *m2; 2693{ 2694 register Command *c; 2695 FILE *rcfile; 2696 int gotmachine = 0; 2697 int l1 = strlen(m1); 2698 int l2 = strlen(m2); 2699 char m1save[64]; 2700 2701 if (skiprc) 2702 return; 2703 2704 strcpy(m1save, m1); 2705 m1 = m1save; 2706 2707 if (rcname == 0) { 2708 rcname = getenv("HOME"); 2709 if (rcname) 2710 strcpy(rcbuf, rcname); 2711 else 2712 rcbuf[0] = '\0'; 2713 strcat(rcbuf, "/.telnetrc"); 2714 rcname = rcbuf; 2715 } 2716 2717 if ((rcfile = fopen(rcname, "r")) == 0) { 2718 return; 2719 } 2720 2721 for (;;) { 2722 if (fgets(line, sizeof(line), rcfile) == NULL) 2723 break; 2724 if (line[0] == 0) 2725 break; 2726 if (line[0] == '#') 2727 continue; 2728 if (gotmachine) { 2729 if (!isspace(line[0])) 2730 gotmachine = 0; 2731 } 2732 if (gotmachine == 0) { 2733 if (isspace(line[0])) 2734 continue; 2735 if (strncasecmp(line, m1, l1) == 0) 2736 strncpy(line, &line[l1], sizeof(line) - l1); 2737 else if (strncasecmp(line, m2, l2) == 0) 2738 strncpy(line, &line[l2], sizeof(line) - l2); 2739 else if (strncasecmp(line, "DEFAULT", 7) == 0) 2740 strncpy(line, &line[7], sizeof(line) - 7); 2741 else 2742 continue; 2743 if (line[0] != ' ' && line[0] != '\t' && line[0] != '\n') 2744 continue; 2745 gotmachine = 1; 2746 } 2747 makeargv(); 2748 if (margv[0] == 0) 2749 continue; 2750 c = getcmd(margv[0]); 2751 if (Ambiguous(c)) { 2752 printf("?Ambiguous command: %s\n", margv[0]); 2753 continue; 2754 } 2755 if (c == 0) { 2756 printf("?Invalid command: %s\n", margv[0]); 2757 continue; 2758 } 2759 /* 2760 * This should never happen... 2761 */ 2762 if (c->needconnect && !connected) { 2763 printf("?Need to be connected first for %s.\n", margv[0]); 2764 continue; 2765 } 2766 (*c->handler)(margc, margv); 2767 } 2768 fclose(rcfile); 2769} 2770 2771#if defined(IP_OPTIONS) && defined(IPPROTO_IP) 2772 2773/* 2774 * Source route is handed in as 2775 * [!]@hop1@hop2...[@|:]dst 2776 * If the leading ! is present, it is a 2777 * strict source route, otherwise it is 2778 * assmed to be a loose source route. 2779 * 2780 * We fill in the source route option as 2781 * hop1,hop2,hop3...dest 2782 * and return a pointer to hop1, which will 2783 * be the address to connect() to. 2784 * 2785 * Arguments: 2786 * arg: pointer to route list to decipher 2787 * 2788 * cpp: If *cpp is not equal to NULL, this is a 2789 * pointer to a pointer to a character array 2790 * that should be filled in with the option. 2791 * 2792 * lenp: pointer to an integer that contains the 2793 * length of *cpp if *cpp != NULL. 2794 * 2795 * Return values: 2796 * 2797 * Returns the address of the host to connect to. If the 2798 * return value is -1, there was a syntax error in the 2799 * option, either unknown characters, or too many hosts. 2800 * If the return value is 0, one of the hostnames in the 2801 * path is unknown, and *cpp is set to point to the bad 2802 * hostname. 2803 * 2804 * *cpp: If *cpp was equal to NULL, it will be filled 2805 * in with a pointer to our static area that has 2806 * the option filled in. This will be 32bit aligned. 2807 * 2808 * *lenp: This will be filled in with how long the option 2809 * pointed to by *cpp is. 2810 * 2811 */ 2812 unsigned long 2813sourceroute(arg, cpp, lenp) 2814 char *arg; 2815 char **cpp; 2816 int *lenp; 2817{ 2818 static char lsr[44]; 2819#ifdef sysV88 2820 static IOPTN ipopt; 2821#endif 2822 char *cp, *cp2, *lsrp, *lsrep; 2823 register int tmp; 2824 struct in_addr sin_addr; 2825 register struct hostent *host = 0; 2826 register char c; 2827 2828 /* 2829 * Verify the arguments, and make sure we have 2830 * at least 7 bytes for the option. 2831 */ 2832 if (cpp == NULL || lenp == NULL) 2833 return((unsigned long)-1); 2834 if (*cpp != NULL && *lenp < 7) 2835 return((unsigned long)-1); 2836 /* 2837 * Decide whether we have a buffer passed to us, 2838 * or if we need to use our own static buffer. 2839 */ 2840 if (*cpp) { 2841 lsrp = *cpp; 2842 lsrep = lsrp + *lenp; 2843 } else { 2844 *cpp = lsrp = lsr; 2845 lsrep = lsrp + 44; 2846 } 2847 2848 cp = arg; 2849 2850 /* 2851 * Next, decide whether we have a loose source 2852 * route or a strict source route, and fill in 2853 * the begining of the option. 2854 */ 2855#ifndef sysV88 2856 if (*cp == '!') { 2857 cp++; 2858 *lsrp++ = IPOPT_SSRR; 2859 } else 2860 *lsrp++ = IPOPT_LSRR; 2861#else 2862 if (*cp == '!') { 2863 cp++; 2864 ipopt.io_type = IPOPT_SSRR; 2865 } else 2866 ipopt.io_type = IPOPT_LSRR; 2867#endif 2868 2869 if (*cp != '@') 2870 return((unsigned long)-1); 2871 2872#ifndef sysV88 2873 lsrp++; /* skip over length, we'll fill it in later */ 2874 *lsrp++ = 4; 2875#endif 2876 2877 cp++; 2878 2879 sin_addr.s_addr = 0; 2880 2881 for (c = 0;;) { 2882 if (c == ':') 2883 cp2 = 0; 2884 else for (cp2 = cp; c = *cp2; cp2++) { 2885 if (c == ',') { 2886 *cp2++ = '\0'; 2887 if (*cp2 == '@') 2888 cp2++; 2889 } else if (c == '@') { 2890 *cp2++ = '\0'; 2891 } else if (c == ':') { 2892 *cp2++ = '\0'; 2893 } else 2894 continue; 2895 break; 2896 } 2897 if (!c) 2898 cp2 = 0; 2899 2900 if ((tmp = inet_addr(cp)) != -1) { 2901 sin_addr.s_addr = tmp; 2902 } else if (host = gethostbyname(cp)) { 2903#if defined(h_addr) 2904 memmove((caddr_t)&sin_addr, 2905 host->h_addr_list[0], host->h_length); 2906#else 2907 memmove((caddr_t)&sin_addr, host->h_addr, host->h_length); 2908#endif 2909 } else { 2910 *cpp = cp; 2911 return(0); 2912 } 2913 memmove(lsrp, (char *)&sin_addr, 4); 2914 lsrp += 4; 2915 if (cp2) 2916 cp = cp2; 2917 else 2918 break; 2919 /* 2920 * Check to make sure there is space for next address 2921 */ 2922 if (lsrp + 4 > lsrep) 2923 return((unsigned long)-1); 2924 } 2925#ifndef sysV88 2926 if ((*(*cpp+IPOPT_OLEN) = lsrp - *cpp) <= 7) { 2927 *cpp = 0; 2928 *lenp = 0; 2929 return((unsigned long)-1); 2930 } 2931 *lsrp++ = IPOPT_NOP; /* 32 bit word align it */ 2932 *lenp = lsrp - *cpp; 2933#else 2934 ipopt.io_len = lsrp - *cpp; 2935 if (ipopt.io_len <= 5) { /* Is 3 better ? */ 2936 *cpp = 0; 2937 *lenp = 0; 2938 return((unsigned long)-1); 2939 } 2940 *lenp = sizeof(ipopt); 2941 *cpp = (char *) &ipopt; 2942#endif 2943 return(sin_addr.s_addr); 2944} 2945#endif 2946