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 <stdint.h> 42 #include <stdio.h> 43 #include <stdlib.h> 44 #include <string.h> 45 #include <sysexits.h> 46 #include <termios.h> 47 #include <unistd.h> 48 49 #include <fetch.h> 50 51 #define MINBUFSIZE 4096 52 53 /* Option flags */ 54 int A_flag; /* -A: do not follow 302 redirects */ 55 int a_flag; /* -a: auto retry */ 56 off_t B_size; /* -B: buffer size */ 57 int b_flag; /*! -b: workaround TCP bug */ 58 char *c_dirname; /* -c: remote directory */ 59 int d_flag; /* -d: direct connection */ 60 int F_flag; /* -F: restart without checking mtime */ 61 char *f_filename; /* -f: file to fetch */ 62 char *h_hostname; /* -h: host to fetch from */ 63 int l_flag; /* -l: link rather than copy file: URLs */ 64 int m_flag; /* -[Mm]: mirror mode */ 65 char *N_filename; /* -N: netrc file name */ 66 int n_flag; /* -n: do not preserve modification time */ 67 int o_flag; /* -o: specify output file */ 68 int o_directory; /* output file is a directory */ 69 char *o_filename; /* name of output file */ 70 int o_stdout; /* output file is stdout */ 71 int once_flag; /* -1: stop at first successful file */ 72 int p_flag; /* -[Pp]: use passive FTP */ 73 int R_flag; /* -R: don't delete partially transferred files */ 74 int r_flag; /* -r: restart previously interrupted transfer */ 75 off_t S_size; /* -S: require size to match */ 76 int s_flag; /* -s: show size, don't fetch */ 77 long T_secs = 120; /* -T: transfer timeout in seconds */ 78 int t_flag; /*! -t: workaround TCP bug */ 79 int U_flag; /* -U: do not use high ports */ 80 int v_level = 1; /* -v: verbosity level */ 81 int v_tty; /* stdout is a tty */ 82 pid_t pgrp; /* our process group */ 83 long w_secs; /* -w: retry delay */ 84 int family = PF_UNSPEC; /* -[46]: address family to use */ 85 86 int sigalrm; /* SIGALRM received */ 87 int siginfo; /* SIGINFO received */ 88 int sigint; /* SIGINT received */ 89 90 long ftp_timeout; /* default timeout for FTP transfers */ 91 long http_timeout; /* default timeout for HTTP transfers */ 92 char *buf; /* transfer buffer */ 93 94 95 /* 96 * Signal handler 97 */ 98 static void 99 sig_handler(int sig) 100 { 101 switch (sig) { 102 case SIGALRM: 103 sigalrm = 1; 104 break; 105 case SIGINFO: 106 siginfo = 1; 107 break; 108 case SIGINT: 109 sigint = 1; 110 break; 111 } 112 } 113 114 struct xferstat { 115 char name[64]; 116 struct timeval start; 117 struct timeval last; 118 off_t size; 119 off_t offset; 120 off_t rcvd; 121 }; 122 123 /* 124 * Compute and display ETA 125 */ 126 static const char * 127 stat_eta(struct xferstat *xs) 128 { 129 static char str[16]; 130 long elapsed, eta; 131 off_t received, expected; 132 133 elapsed = xs->last.tv_sec - xs->start.tv_sec; 134 received = xs->rcvd - xs->offset; 135 expected = xs->size - xs->rcvd; 136 eta = (long)((double)elapsed * expected / received); 137 if (eta > 3600) 138 snprintf(str, sizeof str, "%02ldh%02ldm", 139 eta / 3600, (eta % 3600) / 60); 140 else 141 snprintf(str, sizeof str, "%02ldm%02lds", 142 eta / 60, eta % 60); 143 return (str); 144 } 145 146 /* 147 * Format a number as "xxxx YB" where Y is ' ', 'k', 'M'... 148 */ 149 static const char *prefixes = " kMGTP"; 150 static const char * 151 stat_bytes(size_t bytes) 152 { 153 static char str[16]; 154 const char *prefix = prefixes; 155 156 while (bytes > 9999 && prefix[1] != '\0') { 157 bytes /= 1024; 158 prefix++; 159 } 160 snprintf(str, sizeof str, "%4zu %cB", bytes, *prefix); 161 return (str); 162 } 163 164 /* 165 * Compute and display transfer rate 166 */ 167 static const char * 168 stat_bps(struct xferstat *xs) 169 { 170 static char str[16]; 171 double delta, bps; 172 173 delta = (xs->last.tv_sec + (xs->last.tv_usec / 1.e6)) 174 - (xs->start.tv_sec + (xs->start.tv_usec / 1.e6)); 175 if (delta == 0.0) { 176 snprintf(str, sizeof str, "?? Bps"); 177 } else { 178 bps = (xs->rcvd - xs->offset) / delta; 179 snprintf(str, sizeof str, "%sps", stat_bytes((size_t)bps)); 180 } 181 return (str); 182 } 183 184 /* 185 * Update the stats display 186 */ 187 static void 188 stat_display(struct xferstat *xs, int force) 189 { 190 struct timeval now; 191 int ctty_pgrp; 192 193 /* check if we're the foreground process */ 194 if (ioctl(STDERR_FILENO, TIOCGPGRP, &ctty_pgrp) == -1 || 195 (pid_t)ctty_pgrp != pgrp) 196 return; 197 198 gettimeofday(&now, NULL); 199 if (!force && now.tv_sec <= xs->last.tv_sec) 200 return; 201 xs->last = now; 202 203 fprintf(stderr, "\r%-46s", xs->name); 204 if (xs->size <= 0) { 205 fprintf(stderr, " %s", stat_bytes(xs->rcvd)); 206 } else { 207 fprintf(stderr, "%3d%% of %s", 208 (int)((100.0 * xs->rcvd) / xs->size), 209 stat_bytes(xs->size)); 210 } 211 fprintf(stderr, " %s", stat_bps(xs)); 212 if (xs->size > 0 && xs->rcvd > 0 && 213 xs->last.tv_sec >= xs->start.tv_sec + 10) 214 fprintf(stderr, " %s", stat_eta(xs)); 215 } 216 217 /* 218 * Initialize the transfer statistics 219 */ 220 static void 221 stat_start(struct xferstat *xs, const char *name, off_t size, off_t offset) 222 { 223 snprintf(xs->name, sizeof xs->name, "%s", name); 224 gettimeofday(&xs->start, NULL); 225 xs->last.tv_sec = xs->last.tv_usec = 0; 226 xs->size = size; 227 xs->offset = offset; 228 xs->rcvd = offset; 229 if (v_tty && v_level > 0) 230 stat_display(xs, 1); 231 else if (v_level > 0) 232 fprintf(stderr, "%-46s", xs->name); 233 } 234 235 /* 236 * Update the transfer statistics 237 */ 238 static void 239 stat_update(struct xferstat *xs, off_t rcvd) 240 { 241 xs->rcvd = rcvd; 242 if (v_tty && v_level > 0) 243 stat_display(xs, 0); 244 } 245 246 /* 247 * Finalize the transfer statistics 248 */ 249 static void 250 stat_end(struct xferstat *xs) 251 { 252 gettimeofday(&xs->last, NULL); 253 if (v_tty && v_level > 0) { 254 stat_display(xs, 1); 255 putc('\n', stderr); 256 } else if (v_level > 0) { 257 fprintf(stderr, " %s %s\n", 258 stat_bytes(xs->size), stat_bps(xs)); 259 } 260 } 261 262 /* 263 * Ask the user for authentication details 264 */ 265 static int 266 query_auth(struct url *URL) 267 { 268 struct termios tios; 269 tcflag_t saved_flags; 270 int i, nopwd; 271 272 273 fprintf(stderr, "Authentication required for <%s://%s:%d/>!\n", 274 URL->scheme, URL->host, URL->port); 275 276 fprintf(stderr, "Login: "); 277 if (fgets(URL->user, sizeof URL->user, stdin) == NULL) 278 return -1; 279 for (i = 0; URL->user[i]; ++i) 280 if (isspace(URL->user[i])) 281 URL->user[i] = '\0'; 282 283 fprintf(stderr, "Password: "); 284 if (tcgetattr(STDIN_FILENO, &tios) == 0) { 285 saved_flags = tios.c_lflag; 286 tios.c_lflag &= ~ECHO; 287 tios.c_lflag |= ECHONL|ICANON; 288 tcsetattr(STDIN_FILENO, TCSAFLUSH|TCSASOFT, &tios); 289 nopwd = (fgets(URL->pwd, sizeof URL->pwd, stdin) == NULL); 290 tios.c_lflag = saved_flags; 291 tcsetattr(STDIN_FILENO, TCSANOW|TCSASOFT, &tios); 292 } else { 293 nopwd = (fgets(URL->pwd, sizeof URL->pwd, stdin) == NULL); 294 } 295 if (nopwd) 296 return -1; 297 298 for (i = 0; URL->pwd[i]; ++i) 299 if (isspace(URL->pwd[i])) 300 URL->pwd[i] = '\0'; 301 return 0; 302 } 303 304 /* 305 * Fetch a file 306 */ 307 static int 308 fetch(char *URL, const char *path) 309 { 310 struct url *url; 311 struct url_stat us; 312 struct stat sb, nsb; 313 struct xferstat xs; 314 FILE *f, *of; 315 size_t size, wr; 316 off_t count; 317 char flags[8]; 318 const char *slash; 319 char *tmppath; 320 int r; 321 unsigned timeout; 322 char *ptr; 323 324 f = of = NULL; 325 tmppath = NULL; 326 327 timeout = 0; 328 *flags = 0; 329 count = 0; 330 331 /* set verbosity level */ 332 if (v_level > 1) 333 strcat(flags, "v"); 334 if (v_level > 2) 335 fetchDebug = 1; 336 337 /* parse URL */ 338 if ((url = fetchParseURL(URL)) == NULL) { 339 warnx("%s: parse error", URL); 340 goto failure; 341 } 342 343 /* if no scheme was specified, take a guess */ 344 if (!*url->scheme) { 345 if (!*url->host) 346 strcpy(url->scheme, SCHEME_FILE); 347 else if (strncasecmp(url->host, "ftp.", 4) == 0) 348 strcpy(url->scheme, SCHEME_FTP); 349 else if (strncasecmp(url->host, "www.", 4) == 0) 350 strcpy(url->scheme, SCHEME_HTTP); 351 } 352 353 /* common flags */ 354 switch (family) { 355 case PF_INET: 356 strcat(flags, "4"); 357 break; 358 case PF_INET6: 359 strcat(flags, "6"); 360 break; 361 } 362 363 /* FTP specific flags */ 364 if (strcmp(url->scheme, "ftp") == 0) { 365 if (p_flag) 366 strcat(flags, "p"); 367 if (d_flag) 368 strcat(flags, "d"); 369 if (U_flag) 370 strcat(flags, "l"); 371 timeout = T_secs ? T_secs : ftp_timeout; 372 } 373 374 /* HTTP specific flags */ 375 if (strcmp(url->scheme, "http") == 0) { 376 if (d_flag) 377 strcat(flags, "d"); 378 if (A_flag) 379 strcat(flags, "A"); 380 timeout = T_secs ? T_secs : http_timeout; 381 } 382 383 /* set the protocol timeout. */ 384 fetchTimeout = timeout; 385 386 /* just print size */ 387 if (s_flag) { 388 if (timeout) 389 alarm(timeout); 390 r = fetchStat(url, &us, flags); 391 if (timeout) 392 alarm(0); 393 if (sigalrm || sigint) 394 goto signal; 395 if (r == -1) { 396 warnx("%s", fetchLastErrString); 397 goto failure; 398 } 399 if (us.size == -1) 400 printf("Unknown\n"); 401 else 402 printf("%jd\n", (intmax_t)us.size); 403 goto success; 404 } 405 406 /* 407 * If the -r flag was specified, we have to compare the local 408 * and remote files, so we should really do a fetchStat() 409 * first, but I know of at least one HTTP server that only 410 * sends the content size in response to GET requests, and 411 * leaves it out of replies to HEAD requests. Also, in the 412 * (frequent) case that the local and remote files match but 413 * the local file is truncated, we have sufficient information 414 * before the compare to issue a correct request. Therefore, 415 * we always issue a GET request as if we were sure the local 416 * file was a truncated copy of the remote file; we can drop 417 * the connection later if we change our minds. 418 */ 419 sb.st_size = -1; 420 if (!o_stdout && stat(path, &sb) == -1 && errno != ENOENT) { 421 warnx("%s: stat()", path); 422 goto failure; 423 } 424 if (!o_stdout && r_flag && S_ISREG(sb.st_mode)) 425 url->offset = sb.st_size; 426 427 /* start the transfer */ 428 if (timeout) 429 alarm(timeout); 430 f = fetchXGet(url, &us, flags); 431 if (timeout) 432 alarm(0); 433 if (sigalrm || sigint) 434 goto signal; 435 if (f == NULL) { 436 warnx("%s: %s", URL, fetchLastErrString); 437 goto failure; 438 } 439 if (sigint) 440 goto signal; 441 442 /* check that size is as expected */ 443 if (S_size) { 444 if (us.size == -1) { 445 warnx("%s: size unknown", URL); 446 goto failure; 447 } else if (us.size != S_size) { 448 warnx("%s: size mismatch: expected %jd, actual %jd", 449 URL, (intmax_t)S_size, (intmax_t)us.size); 450 goto failure; 451 } 452 } 453 454 /* symlink instead of copy */ 455 if (l_flag && strcmp(url->scheme, "file") == 0 && !o_stdout) { 456 if (symlink(url->doc, path) == -1) { 457 warn("%s: symlink()", path); 458 goto failure; 459 } 460 goto success; 461 } 462 463 if (us.size == -1 && !o_stdout && v_level > 0) 464 warnx("%s: size of remote file is not known", URL); 465 if (v_level > 1) { 466 if (sb.st_size != -1) 467 fprintf(stderr, "local size / mtime: %jd / %ld\n", 468 (intmax_t)sb.st_size, (long)sb.st_mtime); 469 if (us.size != -1) 470 fprintf(stderr, "remote size / mtime: %jd / %ld\n", 471 (intmax_t)us.size, (long)us.mtime); 472 } 473 474 /* open output file */ 475 if (o_stdout) { 476 /* output to stdout */ 477 of = stdout; 478 } else if (r_flag && sb.st_size != -1) { 479 /* resume mode, local file exists */ 480 if (!F_flag && us.mtime && sb.st_mtime != us.mtime) { 481 /* no match! have to refetch */ 482 fclose(f); 483 /* if precious, warn the user and give up */ 484 if (R_flag) { 485 warnx("%s: local modification time " 486 "does not match remote", path); 487 goto failure_keep; 488 } 489 } else if (us.size != -1) { 490 if (us.size == sb.st_size) 491 /* nothing to do */ 492 goto success; 493 if (sb.st_size > us.size) { 494 /* local file too long! */ 495 warnx("%s: local file (%jd bytes) is longer " 496 "than remote file (%jd bytes)", path, 497 (intmax_t)sb.st_size, (intmax_t)us.size); 498 goto failure; 499 } 500 /* we got it, open local file */ 501 if ((of = fopen(path, "a")) == NULL) { 502 warn("%s: fopen()", path); 503 goto failure; 504 } 505 /* check that it didn't move under our feet */ 506 if (fstat(fileno(of), &nsb) == -1) { 507 /* can't happen! */ 508 warn("%s: fstat()", path); 509 goto failure; 510 } 511 if (nsb.st_dev != sb.st_dev || 512 nsb.st_ino != nsb.st_ino || 513 nsb.st_size != sb.st_size) { 514 warnx("%s: file has changed", URL); 515 fclose(of); 516 of = NULL; 517 sb = nsb; 518 } 519 } 520 } else if (m_flag && sb.st_size != -1) { 521 /* mirror mode, local file exists */ 522 if (sb.st_size == us.size && sb.st_mtime == us.mtime) 523 goto success; 524 } 525 526 if (of == NULL) { 527 /* 528 * We don't yet have an output file; either this is a 529 * vanilla run with no special flags, or the local and 530 * remote files didn't match. 531 */ 532 533 if (url->offset > 0) { 534 /* 535 * We tried to restart a transfer, but for 536 * some reason gave up - so we have to restart 537 * from scratch if we want the whole file 538 */ 539 url->offset = 0; 540 if ((f = fetchXGet(url, &us, flags)) == NULL) { 541 warnx("%s: %s", URL, fetchLastErrString); 542 goto failure; 543 } 544 if (sigint) 545 goto signal; 546 } 547 548 /* construct a temp file name */ 549 if (sb.st_size != -1 && S_ISREG(sb.st_mode)) { 550 if ((slash = strrchr(path, '/')) == NULL) 551 slash = path; 552 else 553 ++slash; 554 asprintf(&tmppath, "%.*s.fetch.XXXXXX.%s", 555 (int)(slash - path), path, slash); 556 if (tmppath != NULL) { 557 mkstemps(tmppath, strlen(slash) + 1); 558 of = fopen(tmppath, "w"); 559 } 560 } 561 if (of == NULL) 562 of = fopen(path, "w"); 563 if (of == NULL) { 564 warn("%s: open()", path); 565 goto failure; 566 } 567 } 568 count = url->offset; 569 570 /* start the counter */ 571 stat_start(&xs, path, us.size, count); 572 573 sigalrm = siginfo = sigint = 0; 574 575 /* suck in the data */ 576 signal(SIGINFO, sig_handler); 577 while (!sigint) { 578 if (us.size != -1 && us.size - count < B_size) 579 size = us.size - count; 580 else 581 size = B_size; 582 if (siginfo) { 583 stat_end(&xs); 584 siginfo = 0; 585 } 586 if ((size = fread(buf, 1, size, f)) == 0) { 587 if (ferror(f) && errno == EINTR && !sigint) 588 clearerr(f); 589 else 590 break; 591 } 592 stat_update(&xs, count += size); 593 for (ptr = buf; size > 0; ptr += wr, size -= wr) 594 if ((wr = fwrite(ptr, 1, size, of)) < size) { 595 if (ferror(of) && errno == EINTR && !sigint) 596 clearerr(of); 597 else 598 break; 599 } 600 if (size != 0) 601 break; 602 } 603 if (!sigalrm) 604 sigalrm = ferror(f) && errno == ETIMEDOUT; 605 signal(SIGINFO, SIG_DFL); 606 607 stat_end(&xs); 608 609 /* 610 * If the transfer timed out or was interrupted, we still want to 611 * set the mtime in case the file is not removed (-r or -R) and 612 * the user later restarts the transfer. 613 */ 614 signal: 615 /* set mtime of local file */ 616 if (!n_flag && us.mtime && !o_stdout && of != NULL && 617 (stat(path, &sb) != -1) && sb.st_mode & S_IFREG) { 618 struct timeval tv[2]; 619 620 fflush(of); 621 tv[0].tv_sec = (long)(us.atime ? us.atime : us.mtime); 622 tv[1].tv_sec = (long)us.mtime; 623 tv[0].tv_usec = tv[1].tv_usec = 0; 624 if (utimes(tmppath ? tmppath : path, tv)) 625 warn("%s: utimes()", tmppath ? tmppath : path); 626 } 627 628 /* timed out or interrupted? */ 629 if (sigalrm) 630 warnx("transfer timed out"); 631 if (sigint) { 632 warnx("transfer interrupted"); 633 goto failure; 634 } 635 636 /* timeout / interrupt before connection completley established? */ 637 if (f == NULL) 638 goto failure; 639 640 if (!sigalrm) { 641 /* check the status of our files */ 642 if (ferror(f)) 643 warn("%s", URL); 644 if (ferror(of)) 645 warn("%s", path); 646 if (ferror(f) || ferror(of)) 647 goto failure; 648 } 649 650 /* did the transfer complete normally? */ 651 if (us.size != -1 && count < us.size) { 652 warnx("%s appears to be truncated: %jd/%jd bytes", 653 path, (intmax_t)count, (intmax_t)us.size); 654 goto failure_keep; 655 } 656 657 /* 658 * If the transfer timed out and we didn't know how much to 659 * expect, assume the worst (i.e. we didn't get all of it) 660 */ 661 if (sigalrm && us.size == -1) { 662 warnx("%s may be truncated", path); 663 goto failure_keep; 664 } 665 666 success: 667 r = 0; 668 if (tmppath != NULL && rename(tmppath, path) == -1) { 669 warn("%s: rename()", path); 670 goto failure_keep; 671 } 672 goto done; 673 failure: 674 if (of && of != stdout && !R_flag && !r_flag) 675 if (stat(path, &sb) != -1 && (sb.st_mode & S_IFREG)) 676 unlink(tmppath ? tmppath : path); 677 if (R_flag && tmppath != NULL && sb.st_size == -1) 678 rename(tmppath, path); /* ignore errors here */ 679 failure_keep: 680 r = -1; 681 goto done; 682 done: 683 if (f) 684 fclose(f); 685 if (of && of != stdout) 686 fclose(of); 687 if (url) 688 fetchFreeURL(url); 689 if (tmppath != NULL) 690 free(tmppath); 691 return r; 692 } 693 694 static void 695 usage(void) 696 { 697 fprintf(stderr, "%s\n%s\n%s\n", 698 "usage: fetch [-146AFMPRUadlmnpqrsv] [-N netrc] [-o outputfile]", 699 " [-S bytes] [-B bytes] [-T seconds] [-w seconds]", 700 " [-h host -f file [-c dir] | URL ...]"); 701 } 702 703 704 /* 705 * Entry point 706 */ 707 int 708 main(int argc, char *argv[]) 709 { 710 struct stat sb; 711 struct sigaction sa; 712 const char *p, *s; 713 char *end, *q; 714 int c, e, r; 715 716 while ((c = getopt(argc, argv, 717 "146AaB:bc:dFf:Hh:lMmN:nPpo:qRrS:sT:tUvw:")) != -1) 718 switch (c) { 719 case '1': 720 once_flag = 1; 721 break; 722 case '4': 723 family = PF_INET; 724 break; 725 case '6': 726 family = PF_INET6; 727 break; 728 case 'A': 729 A_flag = 1; 730 break; 731 case 'a': 732 a_flag = 1; 733 break; 734 case 'B': 735 B_size = (off_t)strtol(optarg, &end, 10); 736 if (*optarg == '\0' || *end != '\0') 737 errx(1, "invalid buffer size (%s)", optarg); 738 break; 739 case 'b': 740 warnx("warning: the -b option is deprecated"); 741 b_flag = 1; 742 break; 743 case 'c': 744 c_dirname = optarg; 745 break; 746 case 'd': 747 d_flag = 1; 748 break; 749 case 'F': 750 F_flag = 1; 751 break; 752 case 'f': 753 f_filename = optarg; 754 break; 755 case 'H': 756 warnx("the -H option is now implicit, " 757 "use -U to disable"); 758 break; 759 case 'h': 760 h_hostname = optarg; 761 break; 762 case 'l': 763 l_flag = 1; 764 break; 765 case 'o': 766 o_flag = 1; 767 o_filename = optarg; 768 break; 769 case 'M': 770 case 'm': 771 if (r_flag) 772 errx(1, "the -m and -r flags " 773 "are mutually exclusive"); 774 m_flag = 1; 775 break; 776 case 'N': 777 N_filename = optarg; 778 break; 779 case 'n': 780 n_flag = 1; 781 break; 782 case 'P': 783 case 'p': 784 p_flag = 1; 785 break; 786 case 'q': 787 v_level = 0; 788 break; 789 case 'R': 790 R_flag = 1; 791 break; 792 case 'r': 793 if (m_flag) 794 errx(1, "the -m and -r flags " 795 "are mutually exclusive"); 796 r_flag = 1; 797 break; 798 case 'S': 799 S_size = (off_t)strtol(optarg, &end, 10); 800 if (*optarg == '\0' || *end != '\0') 801 errx(1, "invalid size (%s)", optarg); 802 break; 803 case 's': 804 s_flag = 1; 805 break; 806 case 'T': 807 T_secs = strtol(optarg, &end, 10); 808 if (*optarg == '\0' || *end != '\0') 809 errx(1, "invalid timeout (%s)", optarg); 810 break; 811 case 't': 812 t_flag = 1; 813 warnx("warning: the -t option is deprecated"); 814 break; 815 case 'U': 816 U_flag = 1; 817 break; 818 case 'v': 819 v_level++; 820 break; 821 case 'w': 822 a_flag = 1; 823 w_secs = strtol(optarg, &end, 10); 824 if (*optarg == '\0' || *end != '\0') 825 errx(1, "invalid delay (%s)", optarg); 826 break; 827 default: 828 usage(); 829 exit(EX_USAGE); 830 } 831 832 argc -= optind; 833 argv += optind; 834 835 if (h_hostname || f_filename || c_dirname) { 836 if (!h_hostname || !f_filename || argc) { 837 usage(); 838 exit(EX_USAGE); 839 } 840 /* XXX this is a hack. */ 841 if (strcspn(h_hostname, "@:/") != strlen(h_hostname)) 842 errx(1, "invalid hostname"); 843 if (asprintf(argv, "ftp://%s/%s/%s", h_hostname, 844 c_dirname ? c_dirname : "", f_filename) == -1) 845 errx(1, "%s", strerror(ENOMEM)); 846 argc++; 847 } 848 849 if (!argc) { 850 usage(); 851 exit(EX_USAGE); 852 } 853 854 /* allocate buffer */ 855 if (B_size < MINBUFSIZE) 856 B_size = MINBUFSIZE; 857 if ((buf = malloc(B_size)) == NULL) 858 errx(1, "%s", strerror(ENOMEM)); 859 860 /* timeouts */ 861 if ((s = getenv("FTP_TIMEOUT")) != NULL) { 862 ftp_timeout = strtol(s, &end, 10); 863 if (*s == '\0' || *end != '\0' || ftp_timeout < 0) { 864 warnx("FTP_TIMEOUT (%s) is not a positive integer", s); 865 ftp_timeout = 0; 866 } 867 } 868 if ((s = getenv("HTTP_TIMEOUT")) != NULL) { 869 http_timeout = strtol(s, &end, 10); 870 if (*s == '\0' || *end != '\0' || http_timeout < 0) { 871 warnx("HTTP_TIMEOUT (%s) is not a positive integer", s); 872 http_timeout = 0; 873 } 874 } 875 876 /* signal handling */ 877 sa.sa_flags = 0; 878 sa.sa_handler = sig_handler; 879 sigemptyset(&sa.sa_mask); 880 sigaction(SIGALRM, &sa, NULL); 881 sa.sa_flags = SA_RESETHAND; 882 sigaction(SIGINT, &sa, NULL); 883 fetchRestartCalls = 0; 884 885 /* output file */ 886 if (o_flag) { 887 if (strcmp(o_filename, "-") == 0) { 888 o_stdout = 1; 889 } else if (stat(o_filename, &sb) == -1) { 890 if (errno == ENOENT) { 891 if (argc > 1) 892 errx(EX_USAGE, "%s is not a directory", 893 o_filename); 894 } else { 895 err(EX_IOERR, "%s", o_filename); 896 } 897 } else { 898 if (sb.st_mode & S_IFDIR) 899 o_directory = 1; 900 } 901 } 902 903 /* check if output is to a tty (for progress report) */ 904 v_tty = isatty(STDERR_FILENO); 905 if (v_tty) 906 pgrp = getpgrp(); 907 908 r = 0; 909 910 /* authentication */ 911 if (v_tty) 912 fetchAuthMethod = query_auth; 913 if (N_filename != NULL) 914 setenv("NETRC", N_filename, 1); 915 916 while (argc) { 917 if ((p = strrchr(*argv, '/')) == NULL) 918 p = *argv; 919 else 920 p++; 921 922 if (!*p) 923 p = "fetch.out"; 924 925 fetchLastErrCode = 0; 926 927 if (o_flag) { 928 if (o_stdout) { 929 e = fetch(*argv, "-"); 930 } else if (o_directory) { 931 asprintf(&q, "%s/%s", o_filename, p); 932 e = fetch(*argv, q); 933 free(q); 934 } else { 935 e = fetch(*argv, o_filename); 936 } 937 } else { 938 e = fetch(*argv, p); 939 } 940 941 if (sigint) 942 kill(getpid(), SIGINT); 943 944 if (e == 0 && once_flag) 945 exit(0); 946 947 if (e) { 948 r = 1; 949 if ((fetchLastErrCode 950 && fetchLastErrCode != FETCH_UNAVAIL 951 && fetchLastErrCode != FETCH_MOVED 952 && fetchLastErrCode != FETCH_URL 953 && fetchLastErrCode != FETCH_RESOLV 954 && fetchLastErrCode != FETCH_UNKNOWN)) { 955 if (w_secs && v_level) 956 fprintf(stderr, "Waiting %ld seconds " 957 "before retrying\n", w_secs); 958 if (w_secs) 959 sleep(w_secs); 960 if (a_flag) 961 continue; 962 } 963 } 964 965 argc--, argv++; 966 } 967 968 exit(r); 969 } 970