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