main.c revision 1.40
1 /* $NetBSD: main.c,v 1.40 1999/03/31 02:00:42 lukem Exp $ */ 2 3 /* 4 * Copyright (c) 1985, 1989, 1993, 1994 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #include <sys/cdefs.h> 37 #ifndef lint 38 __COPYRIGHT("@(#) Copyright (c) 1985, 1989, 1993, 1994\n\ 39 The Regents of the University of California. All rights reserved.\n"); 40 #endif /* not lint */ 41 42 #ifndef lint 43 #if 0 44 static char sccsid[] = "@(#)main.c 8.6 (Berkeley) 10/9/94"; 45 #else 46 __RCSID("$NetBSD: main.c,v 1.40 1999/03/31 02:00:42 lukem Exp $"); 47 #endif 48 #endif /* not lint */ 49 50 /* 51 * FTP User Program -- Command Interface. 52 */ 53 #include <sys/types.h> 54 #include <sys/socket.h> 55 56 #include <err.h> 57 #include <netdb.h> 58 #include <pwd.h> 59 #include <signal.h> 60 #include <stdio.h> 61 #include <stdlib.h> 62 #include <string.h> 63 #include <unistd.h> 64 65 #include "ftp_var.h" 66 #include "pathnames.h" 67 68 #define FTP_PROXY "ftp_proxy" /* env var with FTP proxy location */ 69 #define HTTP_PROXY "http_proxy" /* env var with HTTP proxy location */ 70 #define NO_PROXY "no_proxy" /* env var with list of non-proxied 71 * hosts, comma or space separated */ 72 73 int main __P((int, char **)); 74 75 int 76 main(argc, argv) 77 int argc; 78 char *argv[]; 79 { 80 struct servent *sp; 81 int ch, top, rval; 82 long port; 83 struct passwd *pw = NULL; 84 char *cp, *ep, homedir[MAXPATHLEN]; 85 int dumbterm; 86 87 sp = getservbyname("ftp", "tcp"); 88 if (sp == 0) 89 ftpport = htons(FTP_PORT); /* good fallback */ 90 else 91 ftpport = sp->s_port; 92 sp = getservbyname("http", "tcp"); 93 if (sp == 0) 94 httpport = htons(HTTP_PORT); /* good fallback */ 95 else 96 httpport = sp->s_port; 97 ftpproxy = getenv(FTP_PROXY); 98 httpproxy = getenv(HTTP_PROXY); 99 no_proxy = getenv(NO_PROXY); 100 gateport = 0; 101 cp = getenv("FTPSERVERPORT"); 102 if (cp != NULL) { 103 port = strtol(cp, &ep, 10); 104 if (port < 1 || port > MAX_IN_PORT_T || *ep != '\0') 105 warnx("bad $FTPSERVERPORT port number: %s (ignored)", 106 cp); 107 else 108 gateport = htons(port); 109 } 110 if (gateport == 0) { 111 sp = getservbyname("ftpgate", "tcp"); 112 if (sp == 0) 113 gateport = htons(GATE_PORT); 114 else 115 gateport = sp->s_port; 116 } 117 doglob = 1; 118 interactive = 1; 119 autologin = 1; 120 passivemode = 1; 121 activefallback = 1; 122 preserve = 1; 123 verbose = 0; 124 progress = 0; 125 gatemode = 0; 126 outfile = NULL; 127 restartautofetch = 0; 128 #ifndef SMALL 129 editing = 0; 130 el = NULL; 131 hist = NULL; 132 #endif 133 mark = HASHBYTES; 134 marg_sl = sl_init(); 135 if ((tmpdir = getenv("TMPDIR")) == NULL) 136 tmpdir = _PATH_TMP; 137 138 /* Set default operation mode based on FTPMODE environment variable */ 139 if ((cp = getenv("FTPMODE")) != NULL) { 140 if (strcmp(cp, "passive") == 0) { 141 passivemode = 1; 142 activefallback = 0; 143 } else if (strcmp(cp, "active") == 0) { 144 passivemode = 0; 145 activefallback = 0; 146 } else if (strcmp(cp, "gate") == 0) { 147 gatemode = 1; 148 } else if (strcmp(cp, "auto") == 0) { 149 passivemode = 1; 150 activefallback = 1; 151 } else 152 warnx("unknown $FTPMODE '%s'; using defaults", cp); 153 } 154 155 if (strcmp(__progname, "pftp") == 0) { 156 passivemode = 1; 157 activefallback = 0; 158 } else if (strcmp(__progname, "gate-ftp") == 0) 159 gatemode = 1; 160 161 gateserver = getenv("FTPSERVER"); 162 if (gateserver == NULL || *gateserver == '\0') 163 gateserver = GATE_SERVER; 164 if (gatemode) { 165 if (*gateserver == '\0') { 166 warnx( 167 "Neither $FTPSERVER nor $GATE_SERVER is defined; disabling gate-ftp"); 168 gatemode = 0; 169 } 170 } 171 172 cp = getenv("TERM"); 173 if (cp == NULL || strcmp(cp, "dumb") == 0) 174 dumbterm = 1; 175 else 176 dumbterm = 0; 177 fromatty = isatty(fileno(stdin)); 178 ttyout = stdout; 179 if (isatty(fileno(ttyout))) { 180 verbose = 1; /* verbose if from a tty */ 181 #ifndef SMALL 182 if (! dumbterm) { 183 editing = 1; /* editing mode on if tty is usable */ 184 if (foregroundproc()) 185 progress = 1; /* progress bar on if fg */ 186 } 187 #endif 188 } 189 190 while ((ch = getopt(argc, argv, "Aadefgino:pP:r:RtvV")) != -1) { 191 switch (ch) { 192 case 'A': 193 activefallback = 0; 194 passivemode = 0; 195 break; 196 197 case 'a': 198 anonftp = 1; 199 break; 200 201 case 'd': 202 options |= SO_DEBUG; 203 debug++; 204 break; 205 206 case 'e': 207 #ifndef SMALL 208 editing = 0; 209 #endif 210 break; 211 212 case 'f': 213 flushcache = 1; 214 break; 215 216 case 'g': 217 doglob = 0; 218 break; 219 220 case 'i': 221 interactive = 0; 222 break; 223 224 case 'n': 225 autologin = 0; 226 break; 227 228 case 'o': 229 outfile = optarg; 230 if (strcmp(outfile, "-") == 0) 231 ttyout = stderr; 232 break; 233 234 case 'p': 235 passivemode = 1; 236 activefallback = 0; 237 break; 238 239 case 'P': 240 port = strtol(optarg, &ep, 10); 241 if (port < 1 || port > MAX_IN_PORT_T || *ep != '\0') 242 warnx("bad port number: %s (ignored)", optarg); 243 else 244 ftpport = htons((in_port_t)port); 245 break; 246 247 case 'r': 248 retry_connect = strtol(optarg, &ep, 10); 249 if (retry_connect < 1 || *ep != '\0') 250 errx(1, "bad retry value: %s", optarg); 251 break; 252 253 case 'R': 254 restartautofetch = 1; 255 break; 256 257 case 't': 258 trace = 1; 259 break; 260 261 case 'v': 262 progress = verbose = 1; 263 break; 264 265 case 'V': 266 progress = verbose = 0; 267 break; 268 269 default: 270 usage(); 271 } 272 } 273 /* set line buffering on ttyout */ 274 setvbuf(ttyout, NULL, _IOLBF, 0); 275 argc -= optind; 276 argv += optind; 277 278 cpend = 0; /* no pending replies */ 279 proxy = 0; /* proxy not active */ 280 crflag = 1; /* strip c.r. on ascii gets */ 281 sendport = -1; /* not using ports */ 282 /* 283 * Set up the home directory in case we're globbing. 284 */ 285 cp = getlogin(); 286 if (cp != NULL) { 287 pw = getpwnam(cp); 288 } 289 if (pw == NULL) 290 pw = getpwuid(getuid()); 291 if (pw != NULL) { 292 home = homedir; 293 (void)strcpy(home, pw->pw_dir); 294 } 295 296 setttywidth(0); 297 (void)xsignal(SIGWINCH, setttywidth); 298 299 #ifdef __GNUC__ /* to shut up gcc warnings */ 300 (void)&argc; 301 (void)&argv; 302 #endif 303 304 if (argc > 0) { 305 if (strchr(argv[0], ':') != NULL) { 306 rval = auto_fetch(argc, argv); 307 if (rval >= 0) /* -1 == connected and cd-ed */ 308 exit(rval); 309 } else { 310 char *xargv[5]; 311 312 if (setjmp(toplevel)) 313 exit(0); 314 (void)signal(SIGINT, (sig_t)intr); 315 (void)signal(SIGPIPE, (sig_t)lostpeer); 316 xargv[0] = __progname; 317 xargv[1] = argv[0]; 318 xargv[2] = argv[1]; 319 xargv[3] = argv[2]; 320 xargv[4] = NULL; 321 do { 322 setpeer(argc+1, xargv); 323 if (!retry_connect) 324 break; 325 if (!connected) { 326 macnum = 0; 327 fprintf(ttyout, 328 "Retrying in %d seconds...\n", 329 retry_connect); 330 sleep(retry_connect); 331 } 332 } while (!connected); 333 retry_connect = 0; /* connected, stop hiding msgs */ 334 } 335 } 336 #ifndef SMALL 337 controlediting(); 338 #endif /* !SMALL */ 339 top = setjmp(toplevel) == 0; 340 if (top) { 341 (void)signal(SIGINT, (sig_t)intr); 342 (void)signal(SIGPIPE, (sig_t)lostpeer); 343 } 344 for (;;) { 345 cmdscanner(top); 346 top = 1; 347 } 348 } 349 350 void 351 intr() 352 { 353 354 alarmtimer(0); 355 longjmp(toplevel, 1); 356 } 357 358 void 359 lostpeer() 360 { 361 362 alarmtimer(0); 363 if (connected) { 364 if (cout != NULL) { 365 (void)shutdown(fileno(cout), 1+1); 366 (void)fclose(cout); 367 cout = NULL; 368 } 369 if (data >= 0) { 370 (void)shutdown(data, 1+1); 371 (void)close(data); 372 data = -1; 373 } 374 connected = 0; 375 } 376 pswitch(1); 377 if (connected) { 378 if (cout != NULL) { 379 (void)shutdown(fileno(cout), 1+1); 380 (void)fclose(cout); 381 cout = NULL; 382 } 383 connected = 0; 384 } 385 proxflag = 0; 386 pswitch(0); 387 } 388 389 /* 390 * Generate a prompt 391 */ 392 char * 393 prompt() 394 { 395 return ("ftp> "); 396 } 397 398 /* 399 * Command parser. 400 */ 401 void 402 cmdscanner(top) 403 int top; 404 { 405 struct cmd *c; 406 int num; 407 408 if (!top 409 #ifndef SMALL 410 && !editing 411 #endif /* !SMALL */ 412 ) 413 (void)putc('\n', ttyout); 414 for (;;) { 415 #ifndef SMALL 416 if (!editing) { 417 #endif /* !SMALL */ 418 if (fromatty) { 419 fputs(prompt(), ttyout); 420 (void)fflush(ttyout); 421 } 422 if (fgets(line, sizeof(line), stdin) == NULL) 423 quit(0, 0); 424 num = strlen(line); 425 if (num == 0) 426 break; 427 if (line[--num] == '\n') { 428 if (num == 0) 429 break; 430 line[num] = '\0'; 431 } else if (num == sizeof(line) - 2) { 432 fputs("sorry, input line too long.\n", ttyout); 433 while ((num = getchar()) != '\n' && num != EOF) 434 /* void */; 435 break; 436 } /* else it was a line without a newline */ 437 #ifndef SMALL 438 } else { 439 const char *buf; 440 HistEvent ev; 441 cursor_pos = NULL; 442 443 if ((buf = el_gets(el, &num)) == NULL || num == 0) 444 quit(0, 0); 445 if (buf[--num] == '\n') { 446 if (num == 0) 447 break; 448 } else if (num >= sizeof(line)) { 449 fputs("sorry, input line too long.\n", ttyout); 450 break; 451 } 452 memcpy(line, buf, num); 453 line[num] = '\0'; 454 history(hist, &ev, H_ENTER, buf); 455 } 456 #endif /* !SMALL */ 457 458 makeargv(); 459 if (margc == 0) 460 continue; 461 c = getcmd(margv[0]); 462 if (c == (struct cmd *)-1) { 463 fputs("?Ambiguous command.\n", ttyout); 464 continue; 465 } 466 if (c == NULL) { 467 #if !defined(SMALL) 468 /* 469 * attempt to el_parse() unknown commands. 470 * any command containing a ':' would be parsed 471 * as "[prog:]cmd ...", and will result in a 472 * false positive if prog != "ftp", so treat 473 * such commands as invalid. 474 */ 475 if (strchr(margv[0], ':') != NULL || 476 el_parse(el, margc, margv) != 0) 477 #endif /* !SMALL */ 478 fputs("?Invalid command.\n", ttyout); 479 continue; 480 } 481 if (c->c_conn && !connected) { 482 fputs("Not connected.\n", ttyout); 483 continue; 484 } 485 confirmrest = 0; 486 (*c->c_handler)(margc, margv); 487 if (bell && c->c_bell) 488 (void)putc('\007', ttyout); 489 if (c->c_handler != help) 490 break; 491 } 492 (void)signal(SIGINT, (sig_t)intr); 493 (void)signal(SIGPIPE, (sig_t)lostpeer); 494 } 495 496 struct cmd * 497 getcmd(name) 498 const char *name; 499 { 500 const char *p, *q; 501 struct cmd *c, *found; 502 int nmatches, longest; 503 504 if (name == NULL) 505 return (0); 506 507 longest = 0; 508 nmatches = 0; 509 found = 0; 510 for (c = cmdtab; (p = c->c_name) != NULL; c++) { 511 for (q = name; *q == *p++; q++) 512 if (*q == 0) /* exact match? */ 513 return (c); 514 if (!*q) { /* the name was a prefix */ 515 if (q - name > longest) { 516 longest = q - name; 517 nmatches = 1; 518 found = c; 519 } else if (q - name == longest) 520 nmatches++; 521 } 522 } 523 if (nmatches > 1) 524 return ((struct cmd *)-1); 525 return (found); 526 } 527 528 /* 529 * Slice a string up into argc/argv. 530 */ 531 532 int slrflag; 533 534 void 535 makeargv() 536 { 537 char *argp; 538 539 stringbase = line; /* scan from first of buffer */ 540 argbase = argbuf; /* store from first of buffer */ 541 slrflag = 0; 542 marg_sl->sl_cur = 0; /* reset to start of marg_sl */ 543 for (margc = 0; ; margc++) { 544 argp = slurpstring(); 545 sl_add(marg_sl, argp); 546 if (argp == NULL) 547 break; 548 } 549 #ifndef SMALL 550 if (cursor_pos == line) { 551 cursor_argc = 0; 552 cursor_argo = 0; 553 } else if (cursor_pos != NULL) { 554 cursor_argc = margc; 555 cursor_argo = strlen(margv[margc-1]); 556 } 557 #endif /* !SMALL */ 558 } 559 560 #ifdef SMALL 561 #define INC_CHKCURSOR(x) (x)++ 562 #else /* !SMALL */ 563 #define INC_CHKCURSOR(x) { (x)++ ; \ 564 if (x == cursor_pos) { \ 565 cursor_argc = margc; \ 566 cursor_argo = ap-argbase; \ 567 cursor_pos = NULL; \ 568 } } 569 570 #endif /* !SMALL */ 571 572 /* 573 * Parse string into argbuf; 574 * implemented with FSM to 575 * handle quoting and strings 576 */ 577 char * 578 slurpstring() 579 { 580 int got_one = 0; 581 char *sb = stringbase; 582 char *ap = argbase; 583 char *tmp = argbase; /* will return this if token found */ 584 585 if (*sb == '!' || *sb == '$') { /* recognize ! as a token for shell */ 586 switch (slrflag) { /* and $ as token for macro invoke */ 587 case 0: 588 slrflag++; 589 INC_CHKCURSOR(stringbase); 590 return ((*sb == '!') ? "!" : "$"); 591 /* NOTREACHED */ 592 case 1: 593 slrflag++; 594 altarg = stringbase; 595 break; 596 default: 597 break; 598 } 599 } 600 601 S0: 602 switch (*sb) { 603 604 case '\0': 605 goto OUT; 606 607 case ' ': 608 case '\t': 609 INC_CHKCURSOR(sb); 610 goto S0; 611 612 default: 613 switch (slrflag) { 614 case 0: 615 slrflag++; 616 break; 617 case 1: 618 slrflag++; 619 altarg = sb; 620 break; 621 default: 622 break; 623 } 624 goto S1; 625 } 626 627 S1: 628 switch (*sb) { 629 630 case ' ': 631 case '\t': 632 case '\0': 633 goto OUT; /* end of token */ 634 635 case '\\': 636 INC_CHKCURSOR(sb); 637 goto S2; /* slurp next character */ 638 639 case '"': 640 INC_CHKCURSOR(sb); 641 goto S3; /* slurp quoted string */ 642 643 default: 644 *ap = *sb; /* add character to token */ 645 ap++; 646 INC_CHKCURSOR(sb); 647 got_one = 1; 648 goto S1; 649 } 650 651 S2: 652 switch (*sb) { 653 654 case '\0': 655 goto OUT; 656 657 default: 658 *ap = *sb; 659 ap++; 660 INC_CHKCURSOR(sb); 661 got_one = 1; 662 goto S1; 663 } 664 665 S3: 666 switch (*sb) { 667 668 case '\0': 669 goto OUT; 670 671 case '"': 672 INC_CHKCURSOR(sb); 673 goto S1; 674 675 default: 676 *ap = *sb; 677 ap++; 678 INC_CHKCURSOR(sb); 679 got_one = 1; 680 goto S3; 681 } 682 683 OUT: 684 if (got_one) 685 *ap++ = '\0'; 686 argbase = ap; /* update storage pointer */ 687 stringbase = sb; /* update scan pointer */ 688 if (got_one) { 689 return (tmp); 690 } 691 switch (slrflag) { 692 case 0: 693 slrflag++; 694 break; 695 case 1: 696 slrflag++; 697 altarg = NULL; 698 break; 699 default: 700 break; 701 } 702 return (NULL); 703 } 704 705 /* 706 * Help command. 707 * Call each command handler with argc == 0 and argv[0] == name. 708 */ 709 void 710 help(argc, argv) 711 int argc; 712 char *argv[]; 713 { 714 struct cmd *c; 715 716 if (argc == 1) { 717 StringList *buf; 718 719 buf = sl_init(); 720 fprintf(ttyout, 721 "%sommands may be abbreviated. Commands are:\n\n", 722 proxy ? "Proxy c" : "C"); 723 for (c = cmdtab; c < &cmdtab[NCMDS]; c++) 724 if (c->c_name && (!proxy || c->c_proxy)) 725 sl_add(buf, c->c_name); 726 list_vertical(buf); 727 sl_free(buf, 0); 728 return; 729 } 730 731 #define HELPINDENT ((int) sizeof("disconnect")) 732 733 while (--argc > 0) { 734 char *arg; 735 736 arg = *++argv; 737 c = getcmd(arg); 738 if (c == (struct cmd *)-1) 739 fprintf(ttyout, "?Ambiguous help command %s\n", arg); 740 else if (c == NULL) 741 fprintf(ttyout, "?Invalid help command %s\n", arg); 742 else 743 fprintf(ttyout, "%-*s\t%s\n", HELPINDENT, 744 c->c_name, c->c_help); 745 } 746 } 747 748 void 749 usage() 750 { 751 (void)fprintf(stderr, 752 "usage: %s [-AadeginptvV] [-r retry] [-P port] [host [port]]\n" 753 " %s [-f] [-o outfile] file:///file\n" 754 " %s [-fR] [-o outfile] ftp://[user[:pass]@]host[:port]/path[/]\n" 755 " %s [-f] [-o outfile] http://host[:port]/path\n" 756 " %s [-fR] [-o outfile] host:path[/]\n", 757 __progname, __progname, __progname, __progname, __progname); 758 exit(1); 759 } 760
Indexes created Thu Sep 25 16:09:42 GMT 2025