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, URL->doc); 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 warnx("tmppath: %s", tmppath); 485 of = fopen(tmppath, "w"); 486 } else { 487 of = fopen(path, "w"); 488 } 489 490 if (of == NULL) { 491 warn("%s: open()", path); 492 goto failure; 493 } 494 } 495 count = url->offset; 496 497 /* start the counter */ 498 stat_start(&xs, path, us.size, count); 499 500 sigalrm = siginfo = sigint = 0; 501 502 /* suck in the data */ 503 signal(SIGINFO, sig_handler); 504 while (!sigint && !sigalrm) { 505 if (us.size != -1 && us.size - count < B_size) 506 size = us.size - count; 507 else 508 size = B_size; 509 if (timeout) 510 alarm(timeout); 511 if (siginfo) { 512 stat_end(&xs); 513 siginfo = 0; 514 } 515 if ((size = fread(buf, 1, size, f)) == 0) { 516 if (ferror(f) && errno == EINTR && !sigalrm && !sigint) 517 clearerr(f); 518 else 519 break; 520 } 521 if (timeout) 522 alarm(0); 523 stat_update(&xs, count += size); 524 for (ptr = buf; size > 0; ptr += wr, size -= wr) 525 if ((wr = fwrite(ptr, 1, size, of)) < size) { 526 if (ferror(of) && errno == EINTR && 527 !sigalrm && !sigint) 528 clearerr(of); 529 else 530 break; 531 } 532 if (size != 0) 533 break; 534 } 535 signal(SIGINFO, SIG_DFL); 536 537 if (timeout) 538 alarm(0); 539 540 stat_end(&xs); 541 542 /* set mtime of local file */ 543 if (!n_flag && us.mtime && !o_stdout 544 && (stat(path, &sb) != -1) && sb.st_mode & S_IFREG) { 545 struct timeval tv[2]; 546 547 fflush(of); 548 tv[0].tv_sec = (long)(us.atime ? us.atime : us.mtime); 549 tv[1].tv_sec = (long)us.mtime; 550 tv[0].tv_usec = tv[1].tv_usec = 0; 551 if (utimes(path, tv)) 552 warn("%s: utimes()", path); 553 } 554 555 /* timed out or interrupted? */ 556 signal: 557 if (sigalrm) 558 warnx("transfer timed out"); 559 if (sigint) { 560 warnx("transfer interrupted"); 561 goto failure; 562 } 563 564 if (!sigalrm) { 565 /* check the status of our files */ 566 if (ferror(f)) 567 warn("%s", URL); 568 if (ferror(of)) 569 warn("%s", path); 570 if (ferror(f) || ferror(of)) 571 goto failure; 572 } 573 574 /* did the transfer complete normally? */ 575 if (us.size != -1 && count < us.size) { 576 warnx("%s appears to be truncated: %lld/%lld bytes", 577 path, (long long)count, (long long)us.size); 578 goto failure_keep; 579 } 580 581 /* 582 * If the transfer timed out and we didn't know how much to 583 * expect, assume the worst (i.e. we didn't get all of it) 584 */ 585 if (sigalrm && us.size == -1) { 586 warnx("%s may be truncated", path); 587 goto failure_keep; 588 } 589 590 success: 591 r = 0; 592 if (tmppath != NULL && rename(tmppath, path) == -1) { 593 warn("%s: rename()", path); 594 goto failure_keep; 595 } 596 goto done; 597 failure: 598 if (of && of != stdout && !R_flag && !r_flag) 599 if (stat(path, &sb) != -1 && (sb.st_mode & S_IFREG)) 600 unlink(tmppath ? tmppath : path); 601 if (R_flag && tmppath != NULL && sb.st_size == -1) 602 rename(tmppath, path); /* ignore errors here */ 603 failure_keep: 604 r = -1; 605 goto done; 606 done: 607 if (f) 608 fclose(f); 609 if (of && of != stdout) 610 fclose(of); 611 if (url) 612 fetchFreeURL(url); 613 if (tmppath != NULL) 614 free(tmppath); 615 return r; 616 } 617 618 static void 619 usage(void) 620 { 621 fprintf(stderr, "%s\n%s\n%s\n", 622 "Usage: fetch [-146AFMPRUadlmnpqrsv] [-o outputfile] [-S bytes]", 623 " [-B bytes] [-T seconds] [-w seconds]", 624 " [-h host -f file [-c dir] | URL ...]"); 625 } 626 627 628 #define PARSENUM(NAME, TYPE) \ 629 static int \ 630 NAME(const char *s, TYPE *v) \ 631 { \ 632 *v = 0; \ 633 for (*v = 0; *s; s++) \ 634 if (isdigit(*s)) \ 635 *v = *v * 10 + *s - '0'; \ 636 else \ 637 return -1; \ 638 return 0; \ 639 } 640 641 PARSENUM(parseint, u_int); 642 PARSENUM(parseoff, off_t); 643 644 /* 645 * Entry point 646 */ 647 int 648 main(int argc, char *argv[]) 649 { 650 struct stat sb; 651 struct sigaction sa; 652 const char *p, *s; 653 char *q; 654 int c, e, r; 655 656 while ((c = getopt(argc, argv, 657 "146AaB:bc:dFf:Hh:lMmnPpo:qRrS:sT:tUvw:")) != EOF) 658 switch (c) { 659 case '1': 660 once_flag = 1; 661 break; 662 case '4': 663 family = PF_INET; 664 break; 665 case '6': 666 family = PF_INET6; 667 break; 668 case 'A': 669 A_flag = 1; 670 break; 671 case 'a': 672 a_flag = 1; 673 break; 674 case 'B': 675 if (parseoff(optarg, &B_size) == -1) 676 errx(1, "invalid buffer size (%s)", optarg); 677 break; 678 case 'b': 679 warnx("warning: the -b option is deprecated"); 680 b_flag = 1; 681 break; 682 case 'c': 683 c_dirname = optarg; 684 break; 685 case 'd': 686 d_flag = 1; 687 break; 688 case 'F': 689 F_flag = 1; 690 break; 691 case 'f': 692 f_filename = optarg; 693 break; 694 case 'H': 695 warnx("The -H option is now implicit, " 696 "use -U to disable"); 697 break; 698 case 'h': 699 h_hostname = optarg; 700 break; 701 case 'l': 702 l_flag = 1; 703 break; 704 case 'o': 705 o_flag = 1; 706 o_filename = optarg; 707 break; 708 case 'M': 709 case 'm': 710 if (r_flag) 711 errx(1, "the -m and -r flags " 712 "are mutually exclusive"); 713 m_flag = 1; 714 break; 715 case 'n': 716 n_flag = 1; 717 break; 718 case 'P': 719 case 'p': 720 p_flag = 1; 721 break; 722 case 'q': 723 v_level = 0; 724 break; 725 case 'R': 726 R_flag = 1; 727 break; 728 case 'r': 729 if (m_flag) 730 errx(1, "the -m and -r flags " 731 "are mutually exclusive"); 732 r_flag = 1; 733 break; 734 case 'S': 735 if (parseoff(optarg, &S_size) == -1) 736 errx(1, "invalid size (%s)", optarg); 737 break; 738 case 's': 739 s_flag = 1; 740 break; 741 case 'T': 742 if (parseint(optarg, &T_secs) == -1) 743 errx(1, "invalid timeout (%s)", optarg); 744 break; 745 case 't': 746 t_flag = 1; 747 warnx("warning: the -t option is deprecated"); 748 break; 749 case 'U': 750 U_flag = 1; 751 break; 752 case 'v': 753 v_level++; 754 break; 755 case 'w': 756 a_flag = 1; 757 if (parseint(optarg, &w_secs) == -1) 758 errx(1, "invalid delay (%s)", optarg); 759 break; 760 default: 761 usage(); 762 exit(EX_USAGE); 763 } 764 765 argc -= optind; 766 argv += optind; 767 768 if (h_hostname || f_filename || c_dirname) { 769 if (!h_hostname || !f_filename || argc) { 770 usage(); 771 exit(EX_USAGE); 772 } 773 /* XXX this is a hack. */ 774 if (strcspn(h_hostname, "@:/") != strlen(h_hostname)) 775 errx(1, "invalid hostname"); 776 if (asprintf(argv, "ftp://%s/%s/%s", h_hostname, 777 c_dirname ? c_dirname : "", f_filename) == -1) 778 errx(1, "%s", strerror(ENOMEM)); 779 argc++; 780 } 781 782 if (!argc) { 783 usage(); 784 exit(EX_USAGE); 785 } 786 787 /* allocate buffer */ 788 if (B_size < MINBUFSIZE) 789 B_size = MINBUFSIZE; 790 if ((buf = malloc(B_size)) == NULL) 791 errx(1, "%s", strerror(ENOMEM)); 792 793 /* timeouts */ 794 if ((s = getenv("FTP_TIMEOUT")) != NULL) { 795 if (parseint(s, &ftp_timeout) == -1) { 796 warnx("FTP_TIMEOUT (%s) is not a positive integer", 797 optarg); 798 ftp_timeout = 0; 799 } 800 } 801 if ((s = getenv("HTTP_TIMEOUT")) != NULL) { 802 if (parseint(s, &http_timeout) == -1) { 803 warnx("HTTP_TIMEOUT (%s) is not a positive integer", 804 optarg); 805 http_timeout = 0; 806 } 807 } 808 809 /* signal handling */ 810 sa.sa_flags = 0; 811 sa.sa_handler = sig_handler; 812 sigemptyset(&sa.sa_mask); 813 sigaction(SIGALRM, &sa, NULL); 814 sa.sa_flags = SA_RESETHAND; 815 sigaction(SIGINT, &sa, NULL); 816 fetchRestartCalls = 0; 817 818 /* output file */ 819 if (o_flag) { 820 if (strcmp(o_filename, "-") == 0) { 821 o_stdout = 1; 822 } else if (stat(o_filename, &sb) == -1) { 823 if (errno == ENOENT) { 824 if (argc > 1) 825 errx(EX_USAGE, "%s is not a directory", 826 o_filename); 827 } else { 828 err(EX_IOERR, "%s", o_filename); 829 } 830 } else { 831 if (sb.st_mode & S_IFDIR) 832 o_directory = 1; 833 } 834 } 835 836 /* check if output is to a tty (for progress report) */ 837 v_tty = isatty(STDERR_FILENO); 838 if (v_tty) 839 pgrp = getpgrp(); 840 841 r = 0; 842 843 /* authentication */ 844 if (v_tty) 845 fetchAuthMethod = query_auth; 846 847 while (argc) { 848 if ((p = strrchr(*argv, '/')) == NULL) 849 p = *argv; 850 else 851 p++; 852 853 if (!*p) 854 p = "fetch.out"; 855 856 fetchLastErrCode = 0; 857 858 if (o_flag) { 859 if (o_stdout) { 860 e = fetch(*argv, "-"); 861 } else if (o_directory) { 862 asprintf(&q, "%s/%s", o_filename, p); 863 e = fetch(*argv, q); 864 free(q); 865 } else { 866 e = fetch(*argv, o_filename); 867 } 868 } else { 869 e = fetch(*argv, p); 870 } 871 872 if (sigint) 873 kill(getpid(), SIGINT); 874 875 if (e == 0 && once_flag) 876 exit(0); 877 878 if (e) { 879 r = 1; 880 if ((fetchLastErrCode 881 && fetchLastErrCode != FETCH_UNAVAIL 882 && fetchLastErrCode != FETCH_MOVED 883 && fetchLastErrCode != FETCH_URL 884 && fetchLastErrCode != FETCH_RESOLV 885 && fetchLastErrCode != FETCH_UNKNOWN)) { 886 if (w_secs && v_level) 887 fprintf(stderr, "Waiting %d seconds " 888 "before retrying\n", w_secs); 889 if (w_secs) 890 sleep(w_secs); 891 if (a_flag) 892 continue; 893 } 894 } 895 896 argc--, argv++; 897 } 898 899 exit(r); 900 } 901