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