main.c revision 1.34
1 /* $NetBSD: main.c,v 1.34 1998/09/28 09:03:22 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 1.34 1998/09/28 09:03:22 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 int main __P((int, char **)); 69 70 int 71 main(argc, argv) 72 int argc; 73 char *argv[]; 74 { 75 struct servent *sp; 76 int ch, top, rval; 77 long port; 78 struct passwd *pw = NULL; 79 char *cp, *ep, homedir[MAXPATHLEN]; 80 char *outfile = NULL; 81 int dumbterm; 82 83 sp = getservbyname("ftp", "tcp"); 84 if (sp == 0) 85 ftpport = htons(FTP_PORT); /* good fallback */ 86 else 87 ftpport = sp->s_port; 88 sp = getservbyname("http", "tcp"); 89 if (sp == 0) 90 httpport = htons(HTTP_PORT); /* good fallback */ 91 else 92 httpport = sp->s_port; 93 gateport = 0; 94 cp = getenv("FTPSERVERPORT"); 95 if (cp != NULL) { 96 port = strtol(cp, &ep, 10); 97 if (port < 1 || port > MAX_IN_PORT_T || *ep != '\0') 98 warnx("bad $FTPSERVERPORT port number: %s (ignored)", 99 cp); 100 else 101 gateport = htons(port); 102 } 103 if (gateport == 0) { 104 sp = getservbyname("ftpgate", "tcp"); 105 if (sp == 0) 106 gateport = htons(GATE_PORT); 107 else 108 gateport = sp->s_port; 109 } 110 doglob = 1; 111 interactive = 1; 112 autologin = 1; 113 passivemode = 1; 114 activefallback = 1; 115 preserve = 1; 116 verbose = 0; 117 progress = 0; 118 gatemode = 0; 119 #ifndef SMALL 120 editing = 0; 121 el = NULL; 122 hist = NULL; 123 #endif 124 mark = HASHBYTES; 125 marg_sl = sl_init(); 126 if ((tmpdir = getenv("TMPDIR")) == NULL) 127 tmpdir = _PATH_TMP; 128 129 /* Set default operation mode based on FTPMODE environment variable */ 130 if ((cp = getenv("FTPMODE")) != NULL) { 131 if (strcmp(cp, "passive") == 0) { 132 passivemode = 1; 133 activefallback = 0; 134 } else if (strcmp(cp, "active") == 0) { 135 passivemode = 0; 136 activefallback = 0; 137 } else if (strcmp(cp, "gate") == 0) { 138 gatemode = 1; 139 } else if (strcmp(cp, "auto") == 0) { 140 passivemode = 1; 141 activefallback = 1; 142 } else 143 warnx("unknown $FTPMODE '%s'; using defaults", cp); 144 } 145 146 if (strcmp(__progname, "pftp") == 0) { 147 passivemode = 1; 148 activefallback = 0; 149 } else if (strcmp(__progname, "gate-ftp") == 0) 150 gatemode = 1; 151 152 gateserver = getenv("FTPSERVER"); 153 if (gateserver == NULL || *gateserver == '\0') 154 gateserver = GATE_SERVER; 155 if (gatemode) { 156 if (*gateserver == '\0') { 157 warnx( 158 "Neither $FTPSERVER nor $GATE_SERVER is defined; disabling gate-ftp"); 159 gatemode = 0; 160 } 161 } 162 163 cp = getenv("TERM"); 164 if (cp == NULL || strcmp(cp, "dumb") == 0) 165 dumbterm = 1; 166 else 167 dumbterm = 0; 168 fromatty = isatty(fileno(stdin)); 169 if (fromatty) { 170 verbose = 1; /* verbose if from a tty */ 171 #ifndef SMALL 172 if (! dumbterm) 173 editing = 1; /* editing mode on if tty is usable */ 174 #endif 175 } 176 ttyout = stdout; 177 #ifndef SMALL 178 if (isatty(fileno(ttyout)) && !dumbterm && foregroundproc()) 179 progress = 1; /* progress bar on if tty is usable */ 180 #endif 181 182 while ((ch = getopt(argc, argv, "Aadegino:pP:r:tvV")) != -1) { 183 switch (ch) { 184 case 'A': 185 activefallback = 0; 186 passivemode = 0; 187 break; 188 189 case 'a': 190 anonftp = 1; 191 break; 192 193 case 'd': 194 options |= SO_DEBUG; 195 debug++; 196 break; 197 198 case 'e': 199 #ifndef SMALL 200 editing = 0; 201 #endif 202 break; 203 204 case 'g': 205 doglob = 0; 206 break; 207 208 case 'i': 209 interactive = 0; 210 break; 211 212 case 'n': 213 autologin = 0; 214 break; 215 216 case 'o': 217 outfile = optarg; 218 if (strcmp(outfile, "-") == 0) 219 ttyout = stderr; 220 break; 221 222 case 'p': 223 passivemode = 1; 224 activefallback = 0; 225 break; 226 227 case 'P': 228 port = strtol(optarg, &ep, 10); 229 if (port < 1 || port > MAX_IN_PORT_T || *ep != '\0') 230 warnx("bad port number: %s (ignored)", optarg); 231 else 232 ftpport = htons((in_port_t)port); 233 break; 234 235 case 'r': 236 retry_connect = strtol(optarg, &ep, 10); 237 if (retry_connect < 1 || retry_connect > MAX_IN_PORT_T 238 || *ep != '\0') 239 errx(1, "bad retry value: %s", optarg); 240 break; 241 242 case 't': 243 trace = 1; 244 break; 245 246 case 'v': 247 verbose = 1; 248 break; 249 250 case 'V': 251 verbose = 0; 252 break; 253 254 default: 255 usage(); 256 } 257 } 258 argc -= optind; 259 argv += optind; 260 261 cpend = 0; /* no pending replies */ 262 proxy = 0; /* proxy not active */ 263 crflag = 1; /* strip c.r. on ascii gets */ 264 sendport = -1; /* not using ports */ 265 /* 266 * Set up the home directory in case we're globbing. 267 */ 268 cp = getlogin(); 269 if (cp != NULL) { 270 pw = getpwnam(cp); 271 } 272 if (pw == NULL) 273 pw = getpwuid(getuid()); 274 if (pw != NULL) { 275 home = homedir; 276 (void)strcpy(home, pw->pw_dir); 277 } 278 279 setttywidth(0); 280 (void)xsignal(SIGWINCH, setttywidth); 281 282 #ifdef __GNUC__ /* to shut up gcc warnings */ 283 (void)&argc; 284 (void)&argv; 285 #endif 286 287 if (argc > 0) { 288 if (strchr(argv[0], ':') != NULL) { 289 anonftp = 1; /* Handle "automatic" transfers. */ 290 rval = auto_fetch(argc, argv, outfile); 291 if (rval >= 0) /* -1 == connected and cd-ed */ 292 exit(rval); 293 } else { 294 char *xargv[5]; 295 296 if (setjmp(toplevel)) 297 exit(0); 298 (void)signal(SIGINT, (sig_t)intr); 299 (void)signal(SIGPIPE, (sig_t)lostpeer); 300 xargv[0] = __progname; 301 xargv[1] = argv[0]; 302 xargv[2] = argv[1]; 303 xargv[3] = argv[2]; 304 xargv[4] = NULL; 305 do { 306 setpeer(argc+1, xargv); 307 if (!retry_connect) 308 break; 309 if (!connected) { 310 macnum = 0; 311 fprintf(ttyout, 312 "Retrying in %d seconds...\n", 313 retry_connect); 314 sleep(retry_connect); 315 } 316 } while (!connected); 317 retry_connect = 0; /* connected, stop hiding msgs */ 318 } 319 } 320 #ifndef SMALL 321 controlediting(); 322 #endif /* !SMALL */ 323 top = setjmp(toplevel) == 0; 324 if (top) { 325 (void)signal(SIGINT, (sig_t)intr); 326 (void)signal(SIGPIPE, (sig_t)lostpeer); 327 } 328 for (;;) { 329 cmdscanner(top); 330 top = 1; 331 } 332 } 333 334 void 335 intr() 336 { 337 338 alarmtimer(0); 339 longjmp(toplevel, 1); 340 } 341 342 void 343 lostpeer() 344 { 345 346 alarmtimer(0); 347 if (connected) { 348 if (cout != NULL) { 349 (void)shutdown(fileno(cout), 1+1); 350 (void)fclose(cout); 351 cout = NULL; 352 } 353 if (data >= 0) { 354 (void)shutdown(data, 1+1); 355 (void)close(data); 356 data = -1; 357 } 358 connected = 0; 359 } 360 pswitch(1); 361 if (connected) { 362 if (cout != NULL) { 363 (void)shutdown(fileno(cout), 1+1); 364 (void)fclose(cout); 365 cout = NULL; 366 } 367 connected = 0; 368 } 369 proxflag = 0; 370 pswitch(0); 371 } 372 373 /* 374 * Generate a prompt 375 */ 376 char * 377 prompt() 378 { 379 return ("ftp> "); 380 } 381 382 /* 383 * Command parser. 384 */ 385 void 386 cmdscanner(top) 387 int top; 388 { 389 struct cmd *c; 390 int num; 391 392 if (!top 393 #ifndef SMALL 394 && !editing 395 #endif /* !SMALL */ 396 ) 397 (void)putc('\n', ttyout); 398 for (;;) { 399 #ifndef SMALL 400 if (!editing) { 401 #endif /* !SMALL */ 402 if (fromatty) { 403 fputs(prompt(), ttyout); 404 (void)fflush(ttyout); 405 } 406 if (fgets(line, sizeof(line), stdin) == NULL) 407 quit(0, 0); 408 num = strlen(line); 409 if (num == 0) 410 break; 411 if (line[--num] == '\n') { 412 if (num == 0) 413 break; 414 line[num] = '\0'; 415 } else if (num == sizeof(line) - 2) { 416 fputs("sorry, input line too long.\n", ttyout); 417 while ((num = getchar()) != '\n' && num != EOF) 418 /* void */; 419 break; 420 } /* else it was a line without a newline */ 421 #ifndef SMALL 422 } else { 423 const char *buf; 424 HistEvent ev; 425 cursor_pos = NULL; 426 427 if ((buf = el_gets(el, &num)) == NULL || num == 0) 428 quit(0, 0); 429 if (line[--num] == '\n') { 430 if (num == 0) 431 break; 432 } else if (num >= sizeof(line)) { 433 fputs("sorry, input line too long.\n", ttyout); 434 break; 435 } 436 memcpy(line, buf, num); 437 line[num] = '\0'; 438 history(hist, &ev, H_ENTER, buf); 439 } 440 #endif /* !SMALL */ 441 442 makeargv(); 443 if (margc == 0) 444 continue; 445 c = getcmd(margv[0]); 446 if (c == (struct cmd *)-1) { 447 fputs("?Ambiguous command.\n", ttyout); 448 continue; 449 } 450 if (c == NULL) { 451 #if !defined(SMALL) 452 /* 453 * attempt to el_parse() unknown commands. 454 * any command containing a ':' would be parsed 455 * as "[prog:]cmd ...", and will result in a 456 * false positive if prog != "ftp", so treat 457 * such commands as invalid. 458 */ 459 if (strchr(margv[0], ':') != NULL || 460 el_parse(el, margc, margv) != 0) 461 #endif /* !SMALL */ 462 fputs("?Invalid command.\n", ttyout); 463 continue; 464 } 465 if (c->c_conn && !connected) { 466 fputs("Not connected.\n", ttyout); 467 continue; 468 } 469 confirmrest = 0; 470 (*c->c_handler)(margc, margv); 471 if (bell && c->c_bell) 472 (void)putc('\007', ttyout); 473 if (c->c_handler != help) 474 break; 475 } 476 (void)signal(SIGINT, (sig_t)intr); 477 (void)signal(SIGPIPE, (sig_t)lostpeer); 478 } 479 480 struct cmd * 481 getcmd(name) 482 const char *name; 483 { 484 const char *p, *q; 485 struct cmd *c, *found; 486 int nmatches, longest; 487 488 if (name == NULL) 489 return (0); 490 491 longest = 0; 492 nmatches = 0; 493 found = 0; 494 for (c = cmdtab; (p = c->c_name) != NULL; c++) { 495 for (q = name; *q == *p++; q++) 496 if (*q == 0) /* exact match? */ 497 return (c); 498 if (!*q) { /* the name was a prefix */ 499 if (q - name > longest) { 500 longest = q - name; 501 nmatches = 1; 502 found = c; 503 } else if (q - name == longest) 504 nmatches++; 505 } 506 } 507 if (nmatches > 1) 508 return ((struct cmd *)-1); 509 return (found); 510 } 511 512 /* 513 * Slice a string up into argc/argv. 514 */ 515 516 int slrflag; 517 518 void 519 makeargv() 520 { 521 char *argp; 522 523 stringbase = line; /* scan from first of buffer */ 524 argbase = argbuf; /* store from first of buffer */ 525 slrflag = 0; 526 marg_sl->sl_cur = 0; /* reset to start of marg_sl */ 527 for (margc = 0; ; margc++) { 528 argp = slurpstring(); 529 sl_add(marg_sl, argp); 530 if (argp == NULL) 531 break; 532 } 533 #ifndef SMALL 534 if (cursor_pos == line) { 535 cursor_argc = 0; 536 cursor_argo = 0; 537 } else if (cursor_pos != NULL) { 538 cursor_argc = margc; 539 cursor_argo = strlen(margv[margc-1]); 540 } 541 #endif /* !SMALL */ 542 } 543 544 #ifdef SMALL 545 #define INC_CHKCURSOR(x) (x)++ 546 #else /* !SMALL */ 547 #define INC_CHKCURSOR(x) { (x)++ ; \ 548 if (x == cursor_pos) { \ 549 cursor_argc = margc; \ 550 cursor_argo = ap-argbase; \ 551 cursor_pos = NULL; \ 552 } } 553 554 #endif /* !SMALL */ 555 556 /* 557 * Parse string into argbuf; 558 * implemented with FSM to 559 * handle quoting and strings 560 */ 561 char * 562 slurpstring() 563 { 564 int got_one = 0; 565 char *sb = stringbase; 566 char *ap = argbase; 567 char *tmp = argbase; /* will return this if token found */ 568 569 if (*sb == '!' || *sb == '$') { /* recognize ! as a token for shell */ 570 switch (slrflag) { /* and $ as token for macro invoke */ 571 case 0: 572 slrflag++; 573 INC_CHKCURSOR(stringbase); 574 return ((*sb == '!') ? "!" : "$"); 575 /* NOTREACHED */ 576 case 1: 577 slrflag++; 578 altarg = stringbase; 579 break; 580 default: 581 break; 582 } 583 } 584 585 S0: 586 switch (*sb) { 587 588 case '\0': 589 goto OUT; 590 591 case ' ': 592 case '\t': 593 INC_CHKCURSOR(sb); 594 goto S0; 595 596 default: 597 switch (slrflag) { 598 case 0: 599 slrflag++; 600 break; 601 case 1: 602 slrflag++; 603 altarg = sb; 604 break; 605 default: 606 break; 607 } 608 goto S1; 609 } 610 611 S1: 612 switch (*sb) { 613 614 case ' ': 615 case '\t': 616 case '\0': 617 goto OUT; /* end of token */ 618 619 case '\\': 620 INC_CHKCURSOR(sb); 621 goto S2; /* slurp next character */ 622 623 case '"': 624 INC_CHKCURSOR(sb); 625 goto S3; /* slurp quoted string */ 626 627 default: 628 *ap = *sb; /* add character to token */ 629 ap++; 630 INC_CHKCURSOR(sb); 631 got_one = 1; 632 goto S1; 633 } 634 635 S2: 636 switch (*sb) { 637 638 case '\0': 639 goto OUT; 640 641 default: 642 *ap = *sb; 643 ap++; 644 INC_CHKCURSOR(sb); 645 got_one = 1; 646 goto S1; 647 } 648 649 S3: 650 switch (*sb) { 651 652 case '\0': 653 goto OUT; 654 655 case '"': 656 INC_CHKCURSOR(sb); 657 goto S1; 658 659 default: 660 *ap = *sb; 661 ap++; 662 INC_CHKCURSOR(sb); 663 got_one = 1; 664 goto S3; 665 } 666 667 OUT: 668 if (got_one) 669 *ap++ = '\0'; 670 argbase = ap; /* update storage pointer */ 671 stringbase = sb; /* update scan pointer */ 672 if (got_one) { 673 return (tmp); 674 } 675 switch (slrflag) { 676 case 0: 677 slrflag++; 678 break; 679 case 1: 680 slrflag++; 681 altarg = NULL; 682 break; 683 default: 684 break; 685 } 686 return (NULL); 687 } 688 689 /* 690 * Help command. 691 * Call each command handler with argc == 0 and argv[0] == name. 692 */ 693 void 694 help(argc, argv) 695 int argc; 696 char *argv[]; 697 { 698 struct cmd *c; 699 700 if (argc == 1) { 701 StringList *buf; 702 703 buf = sl_init(); 704 fprintf(ttyout, 705 "%sommands may be abbreviated. Commands are:\n\n", 706 proxy ? "Proxy c" : "C"); 707 for (c = cmdtab; c < &cmdtab[NCMDS]; c++) 708 if (c->c_name && (!proxy || c->c_proxy)) 709 sl_add(buf, c->c_name); 710 list_vertical(buf); 711 sl_free(buf, 0); 712 return; 713 } 714 715 #define HELPINDENT ((int) sizeof("disconnect")) 716 717 while (--argc > 0) { 718 char *arg; 719 720 arg = *++argv; 721 c = getcmd(arg); 722 if (c == (struct cmd *)-1) 723 fprintf(ttyout, "?Ambiguous help command %s\n", arg); 724 else if (c == NULL) 725 fprintf(ttyout, "?Invalid help command %s\n", arg); 726 else 727 fprintf(ttyout, "%-*s\t%s\n", HELPINDENT, 728 c->c_name, c->c_help); 729 } 730 } 731 732 void 733 usage() 734 { 735 (void)fprintf(stderr, 736 "usage: %s [-AadeginptvV] [-r retry] [-P port] [host [port]]\n" 737 " %s [-o outfile] host:path[/]\n" 738 " %s [-o outfile] ftp://host[:port]/path[/]\n" 739 " %s [-o outfile] http://host[:port]/file\n", 740 __progname, __progname, __progname, __progname); 741 exit(1); 742 } 743
Indexes created Thu Sep 25 16:09:42 GMT 2025