main.c revision 1.51
1 /* $NetBSD: main.c,v 1.51 1999/09/24 06:14:40 lukem Exp $ */ 2 3 /* 4 * Copyright (C) 1997 and 1998 WIDE Project. 5 * 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. Neither the name of the project nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 /* 33 * Copyright (c) 1985, 1989, 1993, 1994 34 * The Regents of the University of California. All rights reserved. 35 * 36 * Redistribution and use in source and binary forms, with or without 37 * modification, are permitted provided that the following conditions 38 * are met: 39 * 1. Redistributions of source code must retain the above copyright 40 * notice, this list of conditions and the following disclaimer. 41 * 2. Redistributions in binary form must reproduce the above copyright 42 * notice, this list of conditions and the following disclaimer in the 43 * documentation and/or other materials provided with the distribution. 44 * 3. All advertising materials mentioning features or use of this software 45 * must display the following acknowledgement: 46 * This product includes software developed by the University of 47 * California, Berkeley and its contributors. 48 * 4. Neither the name of the University nor the names of its contributors 49 * may be used to endorse or promote products derived from this software 50 * without specific prior written permission. 51 * 52 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 53 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 54 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 55 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 56 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 57 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 58 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 59 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 60 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 61 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 62 * SUCH DAMAGE. 63 */ 64 65 #include <sys/cdefs.h> 66 #ifndef lint 67 __COPYRIGHT("@(#) Copyright (c) 1985, 1989, 1993, 1994\n\ 68 The Regents of the University of California. All rights reserved.\n"); 69 #endif /* not lint */ 70 71 #ifndef lint 72 #if 0 73 static char sccsid[] = "@(#)main.c 8.6 (Berkeley) 10/9/94"; 74 #else 75 __RCSID("$NetBSD: main.c,v 1.51 1999/09/24 06:14:40 lukem Exp $"); 76 #endif 77 #endif /* not lint */ 78 79 /* 80 * FTP User Program -- Command Interface. 81 */ 82 #include <sys/types.h> 83 #include <sys/socket.h> 84 85 #include <err.h> 86 #include <netdb.h> 87 #include <pwd.h> 88 #include <signal.h> 89 #include <stdio.h> 90 #include <stdlib.h> 91 #include <string.h> 92 #include <unistd.h> 93 94 #include "ftp_var.h" 95 #include "pathnames.h" 96 97 #define FTP_PROXY "ftp_proxy" /* env var with FTP proxy location */ 98 #define HTTP_PROXY "http_proxy" /* env var with HTTP proxy location */ 99 #define NO_PROXY "no_proxy" /* env var with list of non-proxied 100 * hosts, comma or space separated */ 101 102 int main __P((int, char **)); 103 104 int 105 main(argc, argv) 106 int argc; 107 char *argv[]; 108 { 109 int ch, top, rval; 110 struct passwd *pw = NULL; 111 char *cp, *ep, homedir[MAXPATHLEN]; 112 int dumbterm, s, len; 113 114 ftpport = "ftp"; 115 httpport = "http"; 116 ftpproxy = getenv(FTP_PROXY); 117 httpproxy = getenv(HTTP_PROXY); 118 no_proxy = getenv(NO_PROXY); 119 gateport = NULL; 120 cp = getenv("FTPSERVERPORT"); 121 if (cp != NULL) 122 gateport = cp; 123 else 124 gateport = "ftpgate"; 125 doglob = 1; 126 interactive = 1; 127 autologin = 1; 128 passivemode = 1; 129 activefallback = 1; 130 preserve = 1; 131 verbose = 0; 132 progress = 0; 133 gatemode = 0; 134 outfile = NULL; 135 restartautofetch = 0; 136 #ifndef NO_EDITCOMPLETE 137 editing = 0; 138 el = NULL; 139 hist = NULL; 140 #endif 141 mark = HASHBYTES; 142 rate_get = 0; 143 rate_get_incr = DEFAULTINCR; 144 rate_put = 0; 145 rate_put_incr = DEFAULTINCR; 146 #ifdef INET6 147 epsv4 = 1; 148 #else 149 epsv4 = 0; 150 #endif 151 152 /* 153 * Get the default socket buffer sizes if we don't already have them. 154 * It doesn't matter which socket we do this to, because on the first 155 * call no socket buffer sizes will have been modified, so we are 156 * guaranteed to get the system defaults. 157 */ 158 s = socket(AF_INET, SOCK_STREAM, 0); 159 if (s == -1) 160 err(1, "can't create socket"); 161 len = sizeof(rcvbuf_size); 162 if (getsockopt(s, SOL_SOCKET, SO_RCVBUF, (void *) &rcvbuf_size, &len) 163 < 0) 164 err(1, "unable to get default rcvbuf size"); 165 len = sizeof(sndbuf_size); 166 if (getsockopt(s, SOL_SOCKET, SO_SNDBUF, (void *) &sndbuf_size, &len) 167 < 0) 168 err(1, "unable to get default sndbuf size"); 169 (void)close(s); 170 /* sanity check returned buffer sizes */ 171 if (rcvbuf_size <= 0) 172 rcvbuf_size = 8192; 173 if (sndbuf_size <= 0) 174 sndbuf_size = 8192; 175 176 marg_sl = sl_init(); 177 if ((tmpdir = getenv("TMPDIR")) == NULL) 178 tmpdir = _PATH_TMP; 179 180 /* Set default operation mode based on FTPMODE environment variable */ 181 if ((cp = getenv("FTPMODE")) != NULL) { 182 if (strcmp(cp, "passive") == 0) { 183 passivemode = 1; 184 activefallback = 0; 185 } else if (strcmp(cp, "active") == 0) { 186 passivemode = 0; 187 activefallback = 0; 188 } else if (strcmp(cp, "gate") == 0) { 189 gatemode = 1; 190 } else if (strcmp(cp, "auto") == 0) { 191 passivemode = 1; 192 activefallback = 1; 193 } else 194 warnx("unknown $FTPMODE '%s'; using defaults", cp); 195 } 196 197 if (strcmp(__progname, "pftp") == 0) { 198 passivemode = 1; 199 activefallback = 0; 200 } else if (strcmp(__progname, "gate-ftp") == 0) 201 gatemode = 1; 202 203 gateserver = getenv("FTPSERVER"); 204 if (gateserver == NULL || *gateserver == '\0') 205 gateserver = GATE_SERVER; 206 if (gatemode) { 207 if (*gateserver == '\0') { 208 warnx( 209 "Neither $FTPSERVER nor GATE_SERVER is defined; disabling gate-ftp"); 210 gatemode = 0; 211 } 212 } 213 214 cp = getenv("TERM"); 215 if (cp == NULL || strcmp(cp, "dumb") == 0) 216 dumbterm = 1; 217 else 218 dumbterm = 0; 219 fromatty = isatty(fileno(stdin)); 220 ttyout = stdout; 221 if (isatty(fileno(ttyout))) { 222 verbose = 1; /* verbose if to a tty */ 223 if (! dumbterm) { 224 #ifndef NO_EDITCOMPLETE 225 if (fromatty) /* editing mode on if tty is usable */ 226 editing = 1; 227 #endif 228 #ifndef NO_PROGRESS 229 if (foregroundproc()) 230 progress = 1; /* progress bar on if fg */ 231 #endif 232 } 233 } 234 235 while ((ch = getopt(argc, argv, "Aadefgino:pP:r:RtT:vV")) != -1) { 236 switch (ch) { 237 case 'A': 238 activefallback = 0; 239 passivemode = 0; 240 break; 241 242 case 'a': 243 anonftp = 1; 244 break; 245 246 case 'd': 247 options |= SO_DEBUG; 248 debug++; 249 break; 250 251 case 'e': 252 #ifndef NO_EDITCOMPLETE 253 editing = 0; 254 #endif 255 break; 256 257 case 'f': 258 flushcache = 1; 259 break; 260 261 case 'g': 262 doglob = 0; 263 break; 264 265 case 'i': 266 interactive = 0; 267 break; 268 269 case 'n': 270 autologin = 0; 271 break; 272 273 case 'o': 274 outfile = optarg; 275 if (strcmp(outfile, "-") == 0) 276 ttyout = stderr; 277 break; 278 279 case 'p': 280 passivemode = 1; 281 activefallback = 0; 282 break; 283 284 case 'P': 285 ftpport = optarg; 286 break; 287 288 case 'r': 289 retry_connect = strtol(optarg, &ep, 10); 290 if (retry_connect < 1 || *ep != '\0') 291 errx(1, "bad retry value: %s", optarg); 292 break; 293 294 case 'R': 295 restartautofetch = 1; 296 break; 297 298 case 't': 299 trace = 1; 300 break; 301 302 case 'T': 303 { 304 int targc; 305 char *targv[6], *oac; 306 307 /* look for `dir,max[,incr]' */ 308 targc = 0; 309 targv[targc++] = "-T"; 310 oac = xstrdup(optarg); 311 312 while ((cp = strsep(&oac, ",")) != NULL) { 313 if (*cp == '\0') { 314 warnx("bad throttle value: %s", optarg); 315 usage(); 316 /* NOTREACHED */ 317 } 318 targv[targc++] = cp; 319 if (targc >= 5) 320 break; 321 } 322 if (parserate(targc, targv, 1) == -1) 323 usage(); 324 free(oac); 325 break; 326 } 327 328 case 'v': 329 progress = verbose = 1; 330 break; 331 332 case 'V': 333 progress = verbose = 0; 334 break; 335 336 default: 337 usage(); 338 } 339 } 340 /* set line buffering on ttyout */ 341 setvbuf(ttyout, NULL, _IOLBF, 0); 342 argc -= optind; 343 argv += optind; 344 345 cpend = 0; /* no pending replies */ 346 proxy = 0; /* proxy not active */ 347 crflag = 1; /* strip c.r. on ascii gets */ 348 sendport = -1; /* not using ports */ 349 /* 350 * Set up the home directory in case we're globbing. 351 */ 352 cp = getlogin(); 353 if (cp != NULL) { 354 pw = getpwnam(cp); 355 } 356 if (pw == NULL) 357 pw = getpwuid(getuid()); 358 if (pw != NULL) { 359 home = homedir; 360 (void)strcpy(home, pw->pw_dir); 361 } 362 363 setttywidth(0); 364 (void)xsignal(SIGWINCH, setttywidth); 365 (void)xsignal(SIGUSR1, crankrate); 366 (void)xsignal(SIGUSR2, crankrate); 367 368 #ifdef __GNUC__ /* to shut up gcc warnings */ 369 (void)&argc; 370 (void)&argv; 371 #endif 372 373 if (argc > 0) { 374 if (strchr(argv[0], ':') != NULL && ! isipv6addr(argv[0])) { 375 rval = auto_fetch(argc, argv); 376 if (rval >= 0) /* -1 == connected and cd-ed */ 377 exit(rval); 378 } else { 379 char *xargv[5]; 380 381 if (setjmp(toplevel)) 382 exit(0); 383 (void)signal(SIGINT, (sig_t)intr); 384 (void)signal(SIGPIPE, (sig_t)lostpeer); 385 xargv[0] = __progname; 386 xargv[1] = argv[0]; 387 xargv[2] = argv[1]; 388 xargv[3] = argv[2]; 389 xargv[4] = NULL; 390 do { 391 setpeer(argc+1, xargv); 392 if (!retry_connect) 393 break; 394 if (!connected) { 395 macnum = 0; 396 fprintf(ttyout, 397 "Retrying in %d seconds...\n", 398 retry_connect); 399 sleep(retry_connect); 400 } 401 } while (!connected); 402 retry_connect = 0; /* connected, stop hiding msgs */ 403 } 404 } 405 #ifndef NO_EDITCOMPLETE 406 controlediting(); 407 #endif /* !NO_EDITCOMPLETE */ 408 top = setjmp(toplevel) == 0; 409 if (top) { 410 (void)signal(SIGINT, (sig_t)intr); 411 (void)signal(SIGPIPE, (sig_t)lostpeer); 412 } 413 for (;;) { 414 cmdscanner(top); 415 top = 1; 416 } 417 } 418 419 void 420 intr() 421 { 422 423 alarmtimer(0); 424 longjmp(toplevel, 1); 425 } 426 427 void 428 lostpeer() 429 { 430 431 alarmtimer(0); 432 if (connected) { 433 if (cout != NULL) { 434 (void)shutdown(fileno(cout), 1+1); 435 (void)fclose(cout); 436 cout = NULL; 437 } 438 if (data >= 0) { 439 (void)shutdown(data, 1+1); 440 (void)close(data); 441 data = -1; 442 } 443 connected = 0; 444 } 445 pswitch(1); 446 if (connected) { 447 if (cout != NULL) { 448 (void)shutdown(fileno(cout), 1+1); 449 (void)fclose(cout); 450 cout = NULL; 451 } 452 connected = 0; 453 } 454 proxflag = 0; 455 pswitch(0); 456 } 457 458 /* 459 * Generate a prompt 460 */ 461 char * 462 prompt() 463 { 464 return ("ftp> "); 465 } 466 467 /* 468 * Command parser. 469 */ 470 void 471 cmdscanner(top) 472 int top; 473 { 474 struct cmd *c; 475 int num; 476 477 if (!top 478 #ifndef NO_EDITCOMPLETE 479 && !editing 480 #endif /* !NO_EDITCOMPLETE */ 481 ) 482 (void)putc('\n', ttyout); 483 for (;;) { 484 #ifndef NO_EDITCOMPLETE 485 if (!editing) { 486 #endif /* !NO_EDITCOMPLETE */ 487 if (fromatty) { 488 fputs(prompt(), ttyout); 489 (void)fflush(ttyout); 490 } 491 if (fgets(line, sizeof(line), stdin) == NULL) 492 quit(0, 0); 493 num = strlen(line); 494 if (num == 0) 495 break; 496 if (line[--num] == '\n') { 497 if (num == 0) 498 break; 499 line[num] = '\0'; 500 } else if (num == sizeof(line) - 2) { 501 fputs("sorry, input line too long.\n", ttyout); 502 while ((num = getchar()) != '\n' && num != EOF) 503 /* void */; 504 break; 505 } /* else it was a line without a newline */ 506 #ifndef NO_EDITCOMPLETE 507 } else { 508 const char *buf; 509 HistEvent ev; 510 cursor_pos = NULL; 511 512 if ((buf = el_gets(el, &num)) == NULL || num == 0) 513 quit(0, 0); 514 if (buf[--num] == '\n') { 515 if (num == 0) 516 break; 517 } else if (num >= sizeof(line)) { 518 fputs("sorry, input line too long.\n", ttyout); 519 break; 520 } 521 memcpy(line, buf, num); 522 line[num] = '\0'; 523 history(hist, &ev, H_ENTER, buf); 524 } 525 #endif /* !NO_EDITCOMPLETE */ 526 527 makeargv(); 528 if (margc == 0) 529 continue; 530 c = getcmd(margv[0]); 531 if (c == (struct cmd *)-1) { 532 fputs("?Ambiguous command.\n", ttyout); 533 continue; 534 } 535 if (c == NULL) { 536 #if !defined(NO_EDITCOMPLETE) 537 /* 538 * attempt to el_parse() unknown commands. 539 * any command containing a ':' would be parsed 540 * as "[prog:]cmd ...", and will result in a 541 * false positive if prog != "ftp", so treat 542 * such commands as invalid. 543 */ 544 if (strchr(margv[0], ':') != NULL || 545 el_parse(el, margc, margv) != 0) 546 #endif /* !NO_EDITCOMPLETE */ 547 fputs("?Invalid command.\n", ttyout); 548 continue; 549 } 550 if (c->c_conn && !connected) { 551 fputs("Not connected.\n", ttyout); 552 continue; 553 } 554 confirmrest = 0; 555 (*c->c_handler)(margc, margv); 556 if (bell && c->c_bell) 557 (void)putc('\007', ttyout); 558 if (c->c_handler != help) 559 break; 560 } 561 (void)signal(SIGINT, (sig_t)intr); 562 (void)signal(SIGPIPE, (sig_t)lostpeer); 563 } 564 565 struct cmd * 566 getcmd(name) 567 const char *name; 568 { 569 const char *p, *q; 570 struct cmd *c, *found; 571 int nmatches, longest; 572 573 if (name == NULL) 574 return (0); 575 576 longest = 0; 577 nmatches = 0; 578 found = 0; 579 for (c = cmdtab; (p = c->c_name) != NULL; c++) { 580 for (q = name; *q == *p++; q++) 581 if (*q == 0) /* exact match? */ 582 return (c); 583 if (!*q) { /* the name was a prefix */ 584 if (q - name > longest) { 585 longest = q - name; 586 nmatches = 1; 587 found = c; 588 } else if (q - name == longest) 589 nmatches++; 590 } 591 } 592 if (nmatches > 1) 593 return ((struct cmd *)-1); 594 return (found); 595 } 596 597 /* 598 * Slice a string up into argc/argv. 599 */ 600 601 int slrflag; 602 603 void 604 makeargv() 605 { 606 char *argp; 607 608 stringbase = line; /* scan from first of buffer */ 609 argbase = argbuf; /* store from first of buffer */ 610 slrflag = 0; 611 marg_sl->sl_cur = 0; /* reset to start of marg_sl */ 612 for (margc = 0; ; margc++) { 613 argp = slurpstring(); 614 sl_add(marg_sl, argp); 615 if (argp == NULL) 616 break; 617 } 618 #ifndef NO_EDITCOMPLETE 619 if (cursor_pos == line) { 620 cursor_argc = 0; 621 cursor_argo = 0; 622 } else if (cursor_pos != NULL) { 623 cursor_argc = margc; 624 cursor_argo = strlen(margv[margc-1]); 625 } 626 #endif /* !NO_EDITCOMPLETE */ 627 } 628 629 #ifdef NO_EDITCOMPLETE 630 #define INC_CHKCURSOR(x) (x)++ 631 #else /* !NO_EDITCOMPLETE */ 632 #define INC_CHKCURSOR(x) { (x)++ ; \ 633 if (x == cursor_pos) { \ 634 cursor_argc = margc; \ 635 cursor_argo = ap-argbase; \ 636 cursor_pos = NULL; \ 637 } } 638 639 #endif /* !NO_EDITCOMPLETE */ 640 641 /* 642 * Parse string into argbuf; 643 * implemented with FSM to 644 * handle quoting and strings 645 */ 646 char * 647 slurpstring() 648 { 649 int got_one = 0; 650 char *sb = stringbase; 651 char *ap = argbase; 652 char *tmp = argbase; /* will return this if token found */ 653 654 if (*sb == '!' || *sb == '$') { /* recognize ! as a token for shell */ 655 switch (slrflag) { /* and $ as token for macro invoke */ 656 case 0: 657 slrflag++; 658 INC_CHKCURSOR(stringbase); 659 return ((*sb == '!') ? "!" : "$"); 660 /* NOTREACHED */ 661 case 1: 662 slrflag++; 663 altarg = stringbase; 664 break; 665 default: 666 break; 667 } 668 } 669 670 S0: 671 switch (*sb) { 672 673 case '\0': 674 goto OUT; 675 676 case ' ': 677 case '\t': 678 INC_CHKCURSOR(sb); 679 goto S0; 680 681 default: 682 switch (slrflag) { 683 case 0: 684 slrflag++; 685 break; 686 case 1: 687 slrflag++; 688 altarg = sb; 689 break; 690 default: 691 break; 692 } 693 goto S1; 694 } 695 696 S1: 697 switch (*sb) { 698 699 case ' ': 700 case '\t': 701 case '\0': 702 goto OUT; /* end of token */ 703 704 case '\\': 705 INC_CHKCURSOR(sb); 706 goto S2; /* slurp next character */ 707 708 case '"': 709 INC_CHKCURSOR(sb); 710 goto S3; /* slurp quoted string */ 711 712 default: 713 *ap = *sb; /* add character to token */ 714 ap++; 715 INC_CHKCURSOR(sb); 716 got_one = 1; 717 goto S1; 718 } 719 720 S2: 721 switch (*sb) { 722 723 case '\0': 724 goto OUT; 725 726 default: 727 *ap = *sb; 728 ap++; 729 INC_CHKCURSOR(sb); 730 got_one = 1; 731 goto S1; 732 } 733 734 S3: 735 switch (*sb) { 736 737 case '\0': 738 goto OUT; 739 740 case '"': 741 INC_CHKCURSOR(sb); 742 goto S1; 743 744 default: 745 *ap = *sb; 746 ap++; 747 INC_CHKCURSOR(sb); 748 got_one = 1; 749 goto S3; 750 } 751 752 OUT: 753 if (got_one) 754 *ap++ = '\0'; 755 argbase = ap; /* update storage pointer */ 756 stringbase = sb; /* update scan pointer */ 757 if (got_one) { 758 return (tmp); 759 } 760 switch (slrflag) { 761 case 0: 762 slrflag++; 763 break; 764 case 1: 765 slrflag++; 766 altarg = NULL; 767 break; 768 default: 769 break; 770 } 771 return (NULL); 772 } 773 774 /* 775 * Help command. 776 * Call each command handler with argc == 0 and argv[0] == name. 777 */ 778 void 779 help(argc, argv) 780 int argc; 781 char *argv[]; 782 { 783 struct cmd *c; 784 785 if (argc == 1) { 786 StringList *buf; 787 788 buf = sl_init(); 789 fprintf(ttyout, 790 "%sommands may be abbreviated. Commands are:\n\n", 791 proxy ? "Proxy c" : "C"); 792 for (c = cmdtab; c < &cmdtab[NCMDS]; c++) 793 if (c->c_name && (!proxy || c->c_proxy)) 794 sl_add(buf, c->c_name); 795 list_vertical(buf); 796 sl_free(buf, 0); 797 return; 798 } 799 800 #define HELPINDENT ((int) sizeof("disconnect")) 801 802 while (--argc > 0) { 803 char *arg; 804 805 arg = *++argv; 806 c = getcmd(arg); 807 if (c == (struct cmd *)-1) 808 fprintf(ttyout, "?Ambiguous help command %s\n", arg); 809 else if (c == NULL) 810 fprintf(ttyout, "?Invalid help command %s\n", arg); 811 else 812 fprintf(ttyout, "%-*s\t%s\n", HELPINDENT, 813 c->c_name, c->c_help); 814 } 815 } 816 817 void 818 usage() 819 { 820 (void)fprintf(stderr, 821 "usage: %s [-AadefginpRtvV] [-r retry] [-o outfile] [-P port] [-T dir,max[,inc]\n" 822 " [host [port]] [file:///file] [ftp://[user[:pass]@]host[:port]/path[/]]\n" 823 " [http://[user[:pass]@]host[:port]/path] [host:path[/]]\n", __progname); 824 exit(1); 825 } 826
Indexes created Mon Oct 20 20:10:13 GMT 2025