1 /*- 2 * Copyright (c) 2000 Dag-Erling Co�dan Sm�rgrav 3 * 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 * in this position and unchanged. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. The name of the author may not be used to endorse or promote products 15 * derived from this software without specific prior written permission 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 * 28 * $FreeBSD: src/usr.bin/fetch/fetch.c,v 1.10.2.21 2003/06/06 06:48:42 des Exp $ 29 * $DragonFly: src/usr.bin/fetch/fetch.c,v 1.5 2005/01/04 23:08:13 dillon Exp $ 30 */ 31 32 #include <sys/param.h> 33 #include <sys/socket.h> 34 #include <sys/stat.h> 35 #include <sys/time.h> 36 37 #include <ctype.h> 38 #include <err.h> 39 #include <errno.h> 40 #include <signal.h> 41 #include <stdio.h> 42 #include <stdlib.h> 43 #include <string.h> 44 #include <sysexits.h> 45 #include <termios.h> 46 #include <unistd.h> 47 48 #include <fetch.h> 49 50 #define MINBUFSIZE 4096 51 52 /* Option flags */ 53 int A_flag; /* -A: do not follow 302 redirects */ 54 int a_flag; /* -a: auto retry */ 55 off_t B_size; /* -B: buffer size */ 56 int b_flag; /*! -b: workaround TCP bug */ 57 char *c_dirname; /* -c: remote directory */ 58 int d_flag; /* -d: direct connection */ 59 int F_flag; /* -F: restart without checking mtime */ 60 char *f_filename; /* -f: file to fetch */ 61 char *h_hostname; /* -h: host to fetch from */ 62 int l_flag; /* -l: link rather than copy file: URLs */ 63 int m_flag; /* -[Mm]: mirror mode */ 64 char *N_filename; /* -N: netrc file name */ 65 int n_flag; /* -n: do not preserve modification time */ 66 int o_flag; /* -o: specify output file */ 67 int o_directory; /* output file is a directory */ 68 char *o_filename; /* name of output file */ 69 int o_stdout; /* output file is stdout */ 70 int once_flag; /* -1: stop at first successful file */ 71 int p_flag; /* -[Pp]: use passive FTP */ 72 int R_flag; /* -R: don't delete partially transferred files */ 73 int r_flag; /* -r: restart previously interrupted transfer */ 74 off_t S_size; /* -S: require size to match */ 75 int s_flag; /* -s: show size, don't fetch */ 76 long T_secs = 120; /* -T: transfer timeout in seconds */ 77 int t_flag; /*! -t: workaround TCP bug */ 78 int U_flag; /* -U: do not use high ports */ 79 int v_level = 1; /* -v: verbosity level */ 80 int v_tty; /* stdout is a tty */ 81 pid_t pgrp; /* our process group */ 82 long w_secs; /* -w: retry delay */ 83 int family = PF_UNSPEC; /* -[46]: address family to use */ 84 85 int sigalrm; /* SIGALRM received */ 86 int siginfo; /* SIGINFO received */ 87 int sigint; /* SIGINT received */ 88 89 long ftp_timeout; /* default timeout for FTP transfers */ 90 long http_timeout; /* default timeout for HTTP transfers */ 91 u_char *buf; /* transfer buffer */ 92 93 94 /* 95 * Signal handler 96 */ 97 static void 98 sig_handler(int sig) 99 { 100 switch (sig) { 101 case SIGALRM: 102 sigalrm = 1; 103 break; 104 case SIGINFO: 105 siginfo = 1; 106 break; 107 case SIGINT: 108 sigint = 1; 109 break; 110 } 111 } 112 113 struct xferstat { 114 char name[40]; 115 struct timeval start; 116 struct timeval last; 117 off_t size; 118 off_t offset; 119 off_t rcvd; 120 }; 121 122 /* 123 * Compute and display ETA 124 */ 125 static void 126 stat_eta(struct xferstat *xs) 127 { 128 long elapsed, received, expected, eta; 129 130 elapsed = xs->last.tv_sec - xs->start.tv_sec; 131 received = xs->rcvd - xs->offset; 132 expected = xs->size - xs->rcvd; 133 eta = (long)((double)elapsed * expected / received); 134 if (eta > 3600) { 135 fprintf(stderr, "%02ld:", eta / 3600); 136 eta %= 3600; 137 } 138 fprintf(stderr, "%02ld:%02ld", eta / 60, eta % 60); 139 } 140 141 /* 142 * Compute and display transfer rate 143 */ 144 static void 145 stat_bps(struct xferstat *xs) 146 { 147 double delta, bps; 148 149 delta = (xs->last.tv_sec + (xs->last.tv_usec / 1.e6)) 150 - (xs->start.tv_sec + (xs->start.tv_usec / 1.e6)); 151 if (delta == 0.0) { 152 fprintf(stderr, "?? Bps"); 153 return; 154 } 155 bps = (xs->rcvd - xs->offset) / delta; 156 if (bps > 1024*1024) 157 fprintf(stderr, "%.2f MBps", bps / (1024*1024)); 158 else if (bps > 1024) 159 fprintf(stderr, "%.2f kBps", bps / 1024); 160 else 161 fprintf(stderr, "%.2f Bps", bps); 162 } 163 164 /* 165 * Update the stats display 166 */ 167 static void 168 stat_display(struct xferstat *xs, int force) 169 { 170 struct timeval now; 171 int ctty_pgrp; 172 173 if (!v_tty || !v_level) 174 return; 175 176 /* check if we're the foreground process */ 177 if (ioctl(STDERR_FILENO, TIOCGPGRP, &ctty_pgrp) == -1 || 178 (pid_t)ctty_pgrp != pgrp) 179 return; 180 181 gettimeofday(&now, NULL); 182 if (!force && now.tv_sec <= xs->last.tv_sec) 183 return; 184 xs->last = now; 185 186 fprintf(stderr, "\rReceiving %s", xs->name); 187 if (xs->size <= 0) { 188 fprintf(stderr, ": %lld bytes", (long long)xs->rcvd); 189 } else { 190 fprintf(stderr, " (%lld bytes): %d%%", (long long)xs->size, 191 (int)((100.0 * xs->rcvd) / xs->size)); 192 if (xs->rcvd > 0 && xs->last.tv_sec >= xs->start.tv_sec + 30) { 193 fprintf(stderr, " (ETA "); 194 stat_eta(xs); 195 if (v_level > 1) { 196 fprintf(stderr, " at "); 197 stat_bps(xs); 198 } 199 fprintf(stderr, ") "); 200 } 201 } 202 } 203 204 /* 205 * Initialize the transfer statistics 206 */ 207 static void 208 stat_start(struct xferstat *xs, const char *name, off_t size, off_t offset) 209 { 210 snprintf(xs->name, sizeof xs->name, "%s", name); 211 gettimeofday(&xs->start, NULL); 212 xs->last.tv_sec = xs->last.tv_usec = 0; 213 xs->size = size; 214 xs->offset = offset; 215 xs->rcvd = offset; 216 stat_display(xs, 1); 217 } 218 219 /* 220 * Update the transfer statistics 221 */ 222 static void 223 stat_update(struct xferstat *xs, off_t rcvd) 224 { 225 xs->rcvd = rcvd; 226 stat_display(xs, 0); 227 } 228 229 /* 230 * Finalize the transfer statistics 231 */ 232 static void 233 stat_end(struct xferstat *xs) 234 { 235 double delta; 236 237 if (!v_level) 238 return; 239 240 gettimeofday(&xs->last, NULL); 241 242 stat_display(xs, 1); 243 fputc('\n', stderr); 244 delta = (xs->last.tv_sec + (xs->last.tv_usec / 1.e6)) 245 - (xs->start.tv_sec + (xs->start.tv_usec / 1.e6)); 246 fprintf(stderr, "%lld bytes transferred in %.1f seconds (", 247 (long long)(xs->rcvd - xs->offset), delta); 248 stat_bps(xs); 249 fprintf(stderr, ")\n"); 250 } 251 252 /* 253 * Ask the user for authentication details 254 */ 255 static int 256 query_auth(struct url *URL) 257 { 258 struct termios tios; 259 tcflag_t saved_flags; 260 int i, nopwd; 261 262 263 fprintf(stderr, "Authentication required for <%s://%s:%d/>!\n", 264 URL->scheme, URL->host, URL->port); 265 266 fprintf(stderr, "Login: "); 267 if (fgets(URL->user, sizeof URL->user, stdin) == NULL) 268 return -1; 269 for (i = 0; URL->user[i]; ++i) 270 if (isspace(URL->user[i])) 271 URL->user[i] = '\0'; 272 273 fprintf(stderr, "Password: "); 274 if (tcgetattr(STDIN_FILENO, &tios) == 0) { 275 saved_flags = tios.c_lflag; 276 tios.c_lflag &= ~ECHO; 277 tios.c_lflag |= ECHONL|ICANON; 278 tcsetattr(STDIN_FILENO, TCSAFLUSH|TCSASOFT, &tios); 279 nopwd = (fgets(URL->pwd, sizeof URL->pwd, stdin) == NULL); 280 tios.c_lflag = saved_flags; 281 tcsetattr(STDIN_FILENO, TCSANOW|TCSASOFT, &tios); 282 } else { 283 nopwd = (fgets(URL->pwd, sizeof URL->pwd, stdin) == NULL); 284 } 285 if (nopwd) 286 return -1; 287 288 for (i = 0; URL->pwd[i]; ++i) 289 if (isspace(URL->pwd[i])) 290 URL->pwd[i] = '\0'; 291 return 0; 292 } 293 294 /* 295 * Fetch a file 296 */ 297 static int 298 fetch(char *URL, const char *path) 299 { 300 struct url *url; 301 struct url_stat us; 302 struct stat sb, nsb; 303 struct xferstat xs; 304 FILE *f, *of; 305 size_t size, wr; 306 off_t count; 307 char flags[8]; 308 const char *slash; 309 char *tmppath; 310 int r; 311 u_int timeout; 312 u_char *ptr; 313 314 f = of = NULL; 315 tmppath = NULL; 316 317 timeout = 0; 318 *flags = 0; 319 count = 0; 320 321 /* set verbosity level */ 322 if (v_level > 1) 323 strcat(flags, "v"); 324 if (v_level > 2) 325 fetchDebug = 1; 326 327 /* parse URL */ 328 if ((url = fetchParseURL(URL)) == NULL) { 329 warnx("%s: parse error", URL); 330 goto failure; 331 } 332 333 /* if no scheme was specified, take a guess */ 334 if (*url->scheme == 0) { 335 if (*url->host == 0) 336 strcpy(url->scheme, SCHEME_FILE); 337 else if (strncasecmp(url->host, "ftp.", 4) == 0) 338 strcpy(url->scheme, SCHEME_FTP); 339 else if (strncasecmp(url->host, "www.", 4) == 0) 340 strcpy(url->scheme, SCHEME_HTTP); 341 } 342 343 /* common flags */ 344 switch (family) { 345 case PF_INET: 346 strcat(flags, "4"); 347 break; 348 case PF_INET6: 349 strcat(flags, "6"); 350 break; 351 } 352 353 /* FTP specific flags */ 354 if (strcmp(url->scheme, "ftp") == 0) { 355 if (p_flag) 356 strcat(flags, "p"); 357 if (d_flag) 358 strcat(flags, "d"); 359 if (U_flag) 360 strcat(flags, "l"); 361 timeout = T_secs ? T_secs : ftp_timeout; 362 } 363 364 /* HTTP specific flags */ 365 if (strcmp(url->scheme, "http") == 0) { 366 if (d_flag) 367 strcat(flags, "d"); 368 if (A_flag) 369 strcat(flags, "A"); 370 timeout = T_secs ? T_secs : http_timeout; 371 } 372 373 /* set the protocol timeout. */ 374 fetchTimeout = timeout; 375 376 /* just print size */ 377 if (s_flag) { 378 if (timeout) 379 alarm(timeout); 380 r = fetchStat(url, &us, flags); 381 if (timeout) 382 alarm(0); 383 if (sigalrm || sigint) 384 goto signal; 385 if (r == -1) { 386 warnx("%s", fetchLastErrString); 387 goto failure; 388 } 389 if (us.size == -1) 390 printf("Unknown\n"); 391 else 392 printf("%lld\n", (long long)us.size); 393 goto success; 394 } 395 396 /* 397 * If the -r flag was specified, we have to compare the local 398 * and remote files, so we should really do a fetchStat() 399 * first, but I know of at least one HTTP server that only 400 * sends the content size in response to GET requests, and 401 * leaves it out of replies to HEAD requests. Also, in the 402 * (frequent) case that the local and remote files match but 403 * the local file is truncated, we have sufficient information 404 * before the compare to issue a correct request. Therefore, 405 * we always issue a GET request as if we were sure the local 406 * file was a truncated copy of the remote file; we can drop 407 * the connection later if we change our minds. 408 */ 409 sb.st_size = -1; 410 if (!o_stdout && stat(path, &sb) == -1 && errno != ENOENT) { 411 warnx("%s: stat()", path); 412 goto failure; 413 } 414 if (!o_stdout && r_flag && S_ISREG(sb.st_mode)) 415 url->offset = sb.st_size; 416 417 /* start the transfer */ 418 if (timeout) 419 alarm(timeout); 420 f = fetchXGet(url, &us, flags); 421 if (timeout) 422 alarm(0); 423 if (sigalrm || sigint) 424 goto signal; 425 if (f == NULL) { 426 warnx("%s: %s", URL, fetchLastErrString); 427 goto failure; 428 } 429 if (sigint) 430 goto signal; 431 432 /* check that size is as expected */ 433 if (S_size) { 434 if (us.size == -1) { 435 warnx("%s: size unknown", URL); 436 goto failure; 437 } else if (us.size != S_size) { 438 warnx("%s: size mismatch: expected %lld, actual %lld", 439 URL, (long long)S_size, (long long)us.size); 440 goto failure; 441 } 442 } 443 444 /* symlink instead of copy */ 445 if (l_flag && strcmp(url->scheme, "file") == 0 && !o_stdout) { 446 if (symlink(url->doc, path) == -1) { 447 warn("%s: symlink()", path); 448 goto failure; 449 } 450 goto success; 451 } 452 453 if (us.size == -1 && !o_stdout && v_level > 0) 454 warnx("%s: size of remote file is not known", URL); 455 if (v_level > 1) { 456 if (sb.st_size != -1) 457 fprintf(stderr, "local size / mtime: %lld / %ld\n", 458 (long long)sb.st_size, (long)sb.st_mtime); 459 if (us.size != -1) 460 fprintf(stderr, "remote size / mtime: %lld / %ld\n", 461 (long long)us.size, (long)us.mtime); 462 } 463 464 /* open output file */ 465 if (o_stdout) { 466 /* output to stdout */ 467 of = stdout; 468 } else if (r_flag && sb.st_size != -1) { 469 /* resume mode, local file exists */ 470 if (!F_flag && us.mtime && sb.st_mtime != us.mtime) { 471 /* no match! have to refetch */ 472 fclose(f); 473 /* if precious, warn the user and give up */ 474 if (R_flag) { 475 warnx("%s: local modification time " 476 "does not match remote", path); 477 goto failure_keep; 478 } 479 } else { 480 if (us.size == sb.st_size) 481 /* nothing to do */ 482 goto success; 483 if (sb.st_size > us.size) { 484 /* local file too long! */ 485 warnx("%s: local file (%lld bytes) is longer " 486 "than remote file (%lld bytes)", path, 487 (long long)sb.st_size, (long long)us.size); 488 goto failure; 489 } 490 /* we got it, open local file */ 491 if ((of = fopen(path, "a")) == NULL) { 492 warn("%s: fopen()", path); 493 goto failure; 494 } 495 /* check that it didn't move under our feet */ 496 if (fstat(fileno(of), &nsb) == -1) { 497 /* can't happen! */ 498 warn("%s: fstat()", path); 499 goto failure; 500 } 501 if (nsb.st_dev != sb.st_dev || 502 nsb.st_ino != nsb.st_ino || 503 nsb.st_size != sb.st_size) { 504 warnx("%s: file has changed", URL); 505 fclose(of); 506 of = NULL; 507 sb = nsb; 508 } 509 } 510 } else if (m_flag && sb.st_size != -1) { 511 /* mirror mode, local file exists */ 512 if (sb.st_size == us.size && sb.st_mtime == us.mtime) 513 goto success; 514 } 515 516 if (of == NULL) { 517 /* 518 * We don't yet have an output file; either this is a 519 * vanilla run with no special flags, or the local and 520 * remote files didn't match. 521 */ 522 523 if (url->offset > 0) { 524 /* 525 * We tried to restart a transfer, but for 526 * some reason gave up - so we have to restart 527 * from scratch if we want the whole file 528 */ 529 url->offset = 0; 530 if ((f = fetchXGet(url, &us, flags)) == NULL) { 531 warnx("%s: %s", URL, fetchLastErrString); 532 goto failure; 533 } 534 if (sigint) 535 goto signal; 536 } 537 538 /* construct a temporary file name */ 539 if (sb.st_size != -1 && S_ISREG(sb.st_mode)) { 540 if ((slash = strrchr(path, '/')) == NULL) 541 slash = path; 542 else 543 ++slash; 544 asprintf(&tmppath, "%.*s.fetch.XXXXXX.%s", 545 (int)(slash - path), path, slash); 546 if (tmppath != NULL) { 547 if (mkstemps(tmppath, strlen(slash)+1) == -1) { 548 warn("%s: mkstemps()", path); 549 goto failure; 550 } 551 552 of = fopen(tmppath, "w"); 553 } 554 } 555 556 if (of == NULL) 557 if ((of = fopen(path, "w")) == NULL) { 558 warn("%s: fopen()", path); 559 goto failure; 560 } 561 } 562 count = url->offset; 563 564 /* start the counter */ 565 stat_start(&xs, path, us.size, count); 566 567 sigalrm = siginfo = sigint = 0; 568 569 /* suck in the data */ 570 signal(SIGINFO, sig_handler); 571 while (!sigint) { 572 if (us.size != -1 && us.size - count < B_size && 573 us.size - count >= 0) 574 size = us.size - count; 575 else 576 size = B_size; 577 if (siginfo) { 578 stat_end(&xs); 579 siginfo = 0; 580 } 581 if ((size = fread(buf, 1, size, f)) == 0) { 582 if (ferror(f) && errno == EINTR && !sigint) 583 clearerr(f); 584 else 585 break; 586 } 587 stat_update(&xs, count += size); 588 for (ptr = buf; size > 0; ptr += wr, size -= wr) 589 if ((wr = fwrite(ptr, 1, size, of)) < size) { 590 if (ferror(of) && errno == EINTR && !sigint) 591 clearerr(of); 592 else 593 break; 594 } 595 if (size != 0) 596 break; 597 } 598 if (!sigalrm) 599 sigalrm = ferror(f) && errno == ETIMEDOUT; 600 signal(SIGINFO, SIG_DFL); 601 602 stat_end(&xs); 603 604 /* 605 * If the transfer timed out or was interrupted, we still want to 606 * set the mtime in case the file is not removed (-r or -R) and 607 * the user later restarts the transfer. 608 */ 609 signal: 610 /* set mtime of local file */ 611 if (!n_flag && us.mtime && !o_stdout && of != NULL && 612 (stat(path, &sb) != -1) && sb.st_mode & S_IFREG) { 613 struct timeval tv[2]; 614 615 fflush(of); 616 tv[0].tv_sec = (long)(us.atime ? us.atime : us.mtime); 617 tv[1].tv_sec = (long)us.mtime; 618 tv[0].tv_usec = tv[1].tv_usec = 0; 619 if (utimes(tmppath ? tmppath : path, tv)) 620 warn("%s: utimes()", tmppath ? tmppath : path); 621 } 622 623 /* timed out or interrupted? */ 624 if (sigalrm) 625 warnx("transfer timed out"); 626 if (sigint) { 627 warnx("transfer interrupted"); 628 goto failure; 629 } 630 631 /* timeout / interrupt before connection completley established? */ 632 if (f == NULL) 633 goto failure; 634 635 if (!sigalrm) { 636 /* check the status of our files */ 637 if (ferror(f)) 638 warn("%s", URL); 639 if (ferror(of)) 640 warn("%s", path); 641 if (ferror(f) || ferror(of)) 642 goto failure; 643 } 644 645 /* did the transfer complete normally? */ 646 if (us.size != -1 && count < us.size) { 647 warnx("%s appears to be truncated: %lld/%lld bytes", 648 path, (long long)count, (long long)us.size); 649 goto failure_keep; 650 } 651 652 /* 653 * If the transfer timed out and we didn't know how much to 654 * expect, assume the worst (i.e. we didn't get all of it) 655 */ 656 if (sigalrm && us.size == -1) { 657 warnx("%s may be truncated", path); 658 goto failure_keep; 659 } 660 661 success: 662 r = 0; 663 if (tmppath != NULL && rename(tmppath, path) == -1) { 664 warn("%s: rename()", path); 665 goto failure_keep; 666 } 667 goto done; 668 failure: 669 if (of && of != stdout && !R_flag && !r_flag) 670 if (stat(path, &sb) != -1 && (sb.st_mode & S_IFREG)) 671 unlink(tmppath ? tmppath : path); 672 if (R_flag && tmppath != NULL && sb.st_size == -1) 673 rename(tmppath, path); /* ignore errors here */ 674 failure_keep: 675 r = -1; 676 goto done; 677 done: 678 if (f) 679 fclose(f); 680 if (of && of != stdout) 681 fclose(of); 682 if (url) 683 fetchFreeURL(url); 684 if (tmppath != NULL) 685 free(tmppath); 686 return r; 687 } 688 689 static void 690 usage(void) 691 { 692 fprintf(stderr, "%s\n%s\n%s\n", 693 "usage: fetch [-146AFMPRUadlmnpqrsv] [-N netrc] [-o outputfile]", 694 " [-S bytes] [-B bytes] [-T seconds] [-w seconds]", 695 " [-h host -f file [-c dir] | URL ...]"); 696 } 697 698 699 /* 700 * Entry point 701 */ 702 int 703 main(int argc, char *argv[]) 704 { 705 struct stat sb; 706 struct sigaction sa; 707 const char *p, *s; 708 char *end, *q; 709 int c, e, r; 710 711 while ((c = getopt(argc, argv, 712 "146AaB:bc:dFf:Hh:lMmN:nPpo:qRrS:sT:tUvw:")) != -1) 713 switch (c) { 714 case '1': 715 once_flag = 1; 716 break; 717 case '4': 718 family = PF_INET; 719 break; 720 case '6': 721 family = PF_INET6; 722 break; 723 case 'A': 724 A_flag = 1; 725 break; 726 case 'a': 727 a_flag = 1; 728 break; 729 case 'B': 730 B_size = (off_t)strtol(optarg, &end, 10); 731 if (*optarg == '\0' || *end != '\0') 732 errx(1, "invalid buffer size (%s)", optarg); 733 break; 734 case 'b': 735 warnx("warning: the -b option is deprecated"); 736 b_flag = 1; 737 break; 738 case 'c': 739 c_dirname = optarg; 740 break; 741 case 'd': 742 d_flag = 1; 743 break; 744 case 'F': 745 F_flag = 1; 746 break; 747 case 'f': 748 f_filename = optarg; 749 break; 750 case 'H': 751 warnx("the -H option is now implicit, " 752 "use -U to disable"); 753 break; 754 case 'h': 755 h_hostname = optarg; 756 break; 757 case 'l': 758 l_flag = 1; 759 break; 760 case 'o': 761 o_flag = 1; 762 o_filename = optarg; 763 break; 764 case 'M': 765 case 'm': 766 if (r_flag) 767 errx(1, "the -m and -r flags " 768 "are mutually exclusive"); 769 m_flag = 1; 770 break; 771 case 'N': 772 N_filename = optarg; 773 break; 774 case 'n': 775 n_flag = 1; 776 break; 777 case 'P': 778 case 'p': 779 p_flag = 1; 780 break; 781 case 'q': 782 v_level = 0; 783 break; 784 case 'R': 785 R_flag = 1; 786 break; 787 case 'r': 788 if (m_flag) 789 errx(1, "the -m and -r flags " 790 "are mutually exclusive"); 791 r_flag = 1; 792 break; 793 case 'S': 794 S_size = (off_t)strtol(optarg, &end, 10); 795 if (*optarg == '\0' || *end != '\0') 796 errx(1, "invalid size (%s)", optarg); 797 break; 798 case 's': 799 s_flag = 1; 800 break; 801 case 'T': 802 T_secs = strtol(optarg, &end, 10); 803 if (*optarg == '\0' || *end != '\0') 804 errx(1, "invalid timeout (%s)", optarg); 805 break; 806 case 't': 807 t_flag = 1; 808 warnx("warning: the -t option is deprecated"); 809 break; 810 case 'U': 811 U_flag = 1; 812 break; 813 case 'v': 814 v_level++; 815 break; 816 case 'w': 817 a_flag = 1; 818 w_secs = strtol(optarg, &end, 10); 819 if (*optarg == '\0' || *end != '\0') 820 errx(1, "invalid delay (%s)", optarg); 821 break; 822 default: 823 usage(); 824 exit(EX_USAGE); 825 } 826 827 argc -= optind; 828 argv += optind; 829 830 if (h_hostname || f_filename || c_dirname) { 831 if (!h_hostname || !f_filename || argc) { 832 usage(); 833 exit(EX_USAGE); 834 } 835 /* XXX this is a hack. */ 836 if (strcspn(h_hostname, "@:/") != strlen(h_hostname)) 837 errx(1, "invalid hostname"); 838 if (asprintf(argv, "ftp://%s/%s/%s", h_hostname, 839 c_dirname ? c_dirname : "", f_filename) == -1) 840 errx(1, "%s", strerror(ENOMEM)); 841 argc++; 842 } 843 844 if (!argc) { 845 usage(); 846 exit(EX_USAGE); 847 } 848 849 /* allocate buffer */ 850 if (B_size < MINBUFSIZE) 851 B_size = MINBUFSIZE; 852 if ((buf = malloc(B_size)) == NULL) 853 errx(1, "%s", strerror(ENOMEM)); 854 855 /* timeouts */ 856 if ((s = getenv("FTP_TIMEOUT")) != NULL) { 857 ftp_timeout = strtol(s, &end, 10); 858 if (*s == '\0' || *end != '\0' || ftp_timeout < 0) { 859 warnx("FTP_TIMEOUT (%s) is not a positive integer", s); 860 ftp_timeout = 0; 861 } 862 } 863 if ((s = getenv("HTTP_TIMEOUT")) != NULL) { 864 http_timeout = strtol(s, &end, 10); 865 if (*s == '\0' || *end != '\0' || http_timeout < 0) { 866 warnx("HTTP_TIMEOUT (%s) is not a positive integer", s); 867 http_timeout = 0; 868 } 869 } 870 871 /* signal handling */ 872 sa.sa_flags = 0; 873 sa.sa_handler = sig_handler; 874 sigemptyset(&sa.sa_mask); 875 sigaction(SIGALRM, &sa, NULL); 876 sa.sa_flags = SA_RESETHAND; 877 sigaction(SIGINT, &sa, NULL); 878 fetchRestartCalls = 0; 879 880 /* output file */ 881 if (o_flag) { 882 if (strcmp(o_filename, "-") == 0) { 883 o_stdout = 1; 884 } else if (stat(o_filename, &sb) == -1) { 885 if (errno == ENOENT) { 886 if (argc > 1) 887 errx(EX_USAGE, "%s is not a directory", 888 o_filename); 889 } else { 890 err(EX_IOERR, "%s", o_filename); 891 } 892 } else { 893 if (sb.st_mode & S_IFDIR) 894 o_directory = 1; 895 } 896 } 897 898 /* check if output is to a tty (for progress report) */ 899 v_tty = isatty(STDERR_FILENO); 900 if (v_tty) 901 pgrp = getpgrp(); 902 903 r = 0; 904 905 /* authentication */ 906 if (v_tty) 907 fetchAuthMethod = query_auth; 908 if (N_filename != NULL) 909 setenv("NETRC", N_filename, 1); 910 911 while (argc) { 912 if ((p = strrchr(*argv, '/')) == NULL) 913 p = *argv; 914 else 915 p++; 916 917 if (!*p) 918 p = "fetch.out"; 919 920 fetchLastErrCode = 0; 921 922 if (o_flag) { 923 if (o_stdout) { 924 e = fetch(*argv, "-"); 925 } else if (o_directory) { 926 asprintf(&q, "%s/%s", o_filename, p); 927 e = fetch(*argv, q); 928 free(q); 929 } else { 930 e = fetch(*argv, o_filename); 931 } 932 } else { 933 e = fetch(*argv, p); 934 } 935 936 if (sigint) 937 kill(getpid(), SIGINT); 938 939 if (e == 0 && once_flag) 940 exit(0); 941 942 if (e) { 943 r = 1; 944 if ((fetchLastErrCode 945 && fetchLastErrCode != FETCH_UNAVAIL 946 && fetchLastErrCode != FETCH_MOVED 947 && fetchLastErrCode != FETCH_URL 948 && fetchLastErrCode != FETCH_RESOLV 949 && fetchLastErrCode != FETCH_UNKNOWN)) { 950 if (w_secs && v_level) 951 fprintf(stderr, "Waiting %ld seconds " 952 "before retrying\n", w_secs); 953 if (w_secs) 954 sleep(w_secs); 955 if (a_flag) 956 continue; 957 } 958 } 959 960 argc--, argv++; 961 } 962 963 exit(r); 964 } 965