1 /*- 2 * Copyright (c) 2000-2004 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(off_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, "%4jd %cB", (intmax_t)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((off_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%-46.46s", 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 fprintf(stderr, "Authentication required for <%s://%s:%d/>!\n", 273 URL->scheme, URL->host, URL->port); 274 275 fprintf(stderr, "Login: "); 276 if (fgets(URL->user, sizeof URL->user, stdin) == NULL) 277 return (-1); 278 for (i = strlen(URL->user); i >= 0; --i) 279 if (URL->user[i] == '\r' || URL->user[i] == '\n') 280 URL->user[i] = '\0'; 281 282 fprintf(stderr, "Password: "); 283 if (tcgetattr(STDIN_FILENO, &tios) == 0) { 284 saved_flags = tios.c_lflag; 285 tios.c_lflag &= ~ECHO; 286 tios.c_lflag |= ECHONL|ICANON; 287 tcsetattr(STDIN_FILENO, TCSAFLUSH|TCSASOFT, &tios); 288 nopwd = (fgets(URL->pwd, sizeof URL->pwd, stdin) == NULL); 289 tios.c_lflag = saved_flags; 290 tcsetattr(STDIN_FILENO, TCSANOW|TCSASOFT, &tios); 291 } else { 292 nopwd = (fgets(URL->pwd, sizeof URL->pwd, stdin) == NULL); 293 } 294 if (nopwd) 295 return (-1); 296 for (i = strlen(URL->pwd); i >= 0; --i) 297 if (URL->pwd[i] == '\r' || URL->pwd[i] == '\n') 298 URL->pwd[i] = '\0'; 299 300 return (0); 301 } 302 303 /* 304 * Fetch a file 305 */ 306 static int 307 fetch(char *URL, const char *path) 308 { 309 struct url *url; 310 struct url_stat us; 311 struct stat sb, nsb; 312 struct xferstat xs; 313 FILE *f, *of; 314 size_t size, wr; 315 off_t count; 316 char flags[8]; 317 const char *slash; 318 char *tmppath; 319 int r; 320 unsigned timeout; 321 char *ptr; 322 323 f = of = NULL; 324 tmppath = NULL; 325 326 timeout = 0; 327 *flags = 0; 328 count = 0; 329 330 /* set verbosity level */ 331 if (v_level > 1) 332 strcat(flags, "v"); 333 if (v_level > 2) 334 fetchDebug = 1; 335 336 /* parse URL */ 337 if ((url = fetchParseURL(URL)) == NULL) { 338 warnx("%s: parse error", URL); 339 goto failure; 340 } 341 342 /* if no scheme was specified, take a guess */ 343 if (!*url->scheme) { 344 if (!*url->host) 345 strcpy(url->scheme, SCHEME_FILE); 346 else if (strncasecmp(url->host, "ftp.", 4) == 0) 347 strcpy(url->scheme, SCHEME_FTP); 348 else if (strncasecmp(url->host, "www.", 4) == 0) 349 strcpy(url->scheme, SCHEME_HTTP); 350 } 351 352 /* common flags */ 353 switch (family) { 354 case PF_INET: 355 strcat(flags, "4"); 356 break; 357 case PF_INET6: 358 strcat(flags, "6"); 359 break; 360 } 361 362 /* FTP specific flags */ 363 if (strcmp(url->scheme, "ftp") == 0) { 364 if (p_flag) 365 strcat(flags, "p"); 366 if (d_flag) 367 strcat(flags, "d"); 368 if (U_flag) 369 strcat(flags, "l"); 370 timeout = T_secs ? T_secs : ftp_timeout; 371 } 372 373 /* HTTP specific flags */ 374 if (strcmp(url->scheme, "http") == 0) { 375 if (d_flag) 376 strcat(flags, "d"); 377 if (A_flag) 378 strcat(flags, "A"); 379 timeout = T_secs ? T_secs : http_timeout; 380 } 381 382 /* set the protocol timeout. */ 383 fetchTimeout = timeout; 384 385 /* just print size */ 386 if (s_flag) { 387 if (timeout) 388 alarm(timeout); 389 r = fetchStat(url, &us, flags); 390 if (timeout) 391 alarm(0); 392 if (sigalrm || sigint) 393 goto signal; 394 if (r == -1) { 395 warnx("%s", fetchLastErrString); 396 goto failure; 397 } 398 if (us.size == -1) 399 printf("Unknown\n"); 400 else 401 printf("%jd\n", (intmax_t)us.size); 402 goto success; 403 } 404 405 /* 406 * If the -r flag was specified, we have to compare the local 407 * and remote files, so we should really do a fetchStat() 408 * first, but I know of at least one HTTP server that only 409 * sends the content size in response to GET requests, and 410 * leaves it out of replies to HEAD requests. Also, in the 411 * (frequent) case that the local and remote files match but 412 * the local file is truncated, we have sufficient information 413 * before the compare to issue a correct request. Therefore, 414 * we always issue a GET request as if we were sure the local 415 * file was a truncated copy of the remote file; we can drop 416 * the connection later if we change our minds. 417 */ 418 sb.st_size = -1; 419 if (!o_stdout) { 420 r = stat(path, &sb); 421 if (r == 0 && r_flag && S_ISREG(sb.st_mode)) { 422 url->offset = sb.st_size; 423 } else { 424 /* 425 * Whatever value sb.st_size has now is either 426 * wrong (if stat(2) failed) or irrelevant (if the 427 * path does not refer to a regular file) 428 */ 429 sb.st_size = -1; 430 if (r == -1 && errno != ENOENT) { 431 warnx("%s: stat()", path); 432 goto failure; 433 } 434 } 435 } 436 437 /* start the transfer */ 438 if (timeout) 439 alarm(timeout); 440 f = fetchXGet(url, &us, flags); 441 if (timeout) 442 alarm(0); 443 if (sigalrm || sigint) 444 goto signal; 445 if (f == NULL) { 446 warnx("%s: %s", URL, fetchLastErrString); 447 goto failure; 448 } 449 if (sigint) 450 goto signal; 451 452 /* check that size is as expected */ 453 if (S_size) { 454 if (us.size == -1) { 455 warnx("%s: size unknown", URL); 456 } else if (us.size != S_size) { 457 warnx("%s: size mismatch: expected %jd, actual %jd", 458 URL, (intmax_t)S_size, (intmax_t)us.size); 459 goto failure; 460 } 461 } 462 463 /* symlink instead of copy */ 464 if (l_flag && strcmp(url->scheme, "file") == 0 && !o_stdout) { 465 if (symlink(url->doc, path) == -1) { 466 warn("%s: symlink()", path); 467 goto failure; 468 } 469 goto success; 470 } 471 472 if (us.size == -1 && !o_stdout && v_level > 0) 473 warnx("%s: size of remote file is not known", URL); 474 if (v_level > 1) { 475 if (sb.st_size != -1) 476 fprintf(stderr, "local size / mtime: %jd / %ld\n", 477 (intmax_t)sb.st_size, (long)sb.st_mtime); 478 if (us.size != -1) 479 fprintf(stderr, "remote size / mtime: %jd / %ld\n", 480 (intmax_t)us.size, (long)us.mtime); 481 } 482 483 /* open output file */ 484 if (o_stdout) { 485 /* output to stdout */ 486 of = stdout; 487 } else if (r_flag && sb.st_size != -1) { 488 /* resume mode, local file exists */ 489 if (!F_flag && us.mtime && sb.st_mtime != us.mtime) { 490 /* no match! have to refetch */ 491 fclose(f); 492 /* if precious, warn the user and give up */ 493 if (R_flag) { 494 warnx("%s: local modification time " 495 "does not match remote", path); 496 goto failure_keep; 497 } 498 } else if (us.size != -1) { 499 if (us.size == sb.st_size) 500 /* nothing to do */ 501 goto success; 502 if (sb.st_size > us.size) { 503 /* local file too long! */ 504 warnx("%s: local file (%jd bytes) is longer " 505 "than remote file (%jd bytes)", path, 506 (intmax_t)sb.st_size, (intmax_t)us.size); 507 goto failure; 508 } 509 /* we got it, open local file */ 510 if ((of = fopen(path, "a")) == NULL) { 511 warn("%s: fopen()", path); 512 goto failure; 513 } 514 /* check that it didn't move under our feet */ 515 if (fstat(fileno(of), &nsb) == -1) { 516 /* can't happen! */ 517 warn("%s: fstat()", path); 518 goto failure; 519 } 520 if (nsb.st_dev != sb.st_dev || 521 nsb.st_ino != nsb.st_ino || 522 nsb.st_size != sb.st_size) { 523 warnx("%s: file has changed", URL); 524 fclose(of); 525 of = NULL; 526 sb = nsb; 527 } 528 } 529 } else if (m_flag && sb.st_size != -1) { 530 /* mirror mode, local file exists */ 531 if (sb.st_size == us.size && sb.st_mtime == us.mtime) 532 goto success; 533 } 534 535 if (of == NULL) { 536 /* 537 * We don't yet have an output file; either this is a 538 * vanilla run with no special flags, or the local and 539 * remote files didn't match. 540 */ 541 542 if (url->offset > 0) { 543 /* 544 * We tried to restart a transfer, but for 545 * some reason gave up - so we have to restart 546 * from scratch if we want the whole file 547 */ 548 url->offset = 0; 549 if ((f = fetchXGet(url, &us, flags)) == NULL) { 550 warnx("%s: %s", URL, fetchLastErrString); 551 goto failure; 552 } 553 if (sigint) 554 goto signal; 555 } 556 557 /* construct a temp file name */ 558 if (sb.st_size != -1 && S_ISREG(sb.st_mode)) { 559 if ((slash = strrchr(path, '/')) == NULL) 560 slash = path; 561 else 562 ++slash; 563 asprintf(&tmppath, "%.*s.fetch.XXXXXX.%s", 564 (int)(slash - path), path, slash); 565 if (tmppath != NULL) { 566 mkstemps(tmppath, strlen(slash) + 1); 567 of = fopen(tmppath, "w"); 568 } 569 } 570 if (of == NULL) 571 of = fopen(path, "w"); 572 if (of == NULL) { 573 warn("%s: open()", path); 574 goto failure; 575 } 576 } 577 count = url->offset; 578 579 /* start the counter */ 580 stat_start(&xs, path, us.size, count); 581 582 sigalrm = siginfo = sigint = 0; 583 584 /* suck in the data */ 585 signal(SIGINFO, sig_handler); 586 while (!sigint) { 587 if (us.size != -1 && us.size - count < B_size) 588 size = us.size - count; 589 else 590 size = B_size; 591 if (siginfo) { 592 stat_end(&xs); 593 siginfo = 0; 594 } 595 if ((size = fread(buf, 1, size, f)) == 0) { 596 if (ferror(f) && errno == EINTR && !sigint) 597 clearerr(f); 598 else 599 break; 600 } 601 stat_update(&xs, count += size); 602 for (ptr = buf; size > 0; ptr += wr, size -= wr) 603 if ((wr = fwrite(ptr, 1, size, of)) < size) { 604 if (ferror(of) && errno == EINTR && !sigint) 605 clearerr(of); 606 else 607 break; 608 } 609 if (size != 0) 610 break; 611 } 612 if (!sigalrm) 613 sigalrm = ferror(f) && errno == ETIMEDOUT; 614 signal(SIGINFO, SIG_DFL); 615 616 stat_end(&xs); 617 618 /* 619 * If the transfer timed out or was interrupted, we still want to 620 * set the mtime in case the file is not removed (-r or -R) and 621 * the user later restarts the transfer. 622 */ 623 signal: 624 /* set mtime of local file */ 625 if (!n_flag && us.mtime && !o_stdout && of != NULL && 626 (stat(path, &sb) != -1) && sb.st_mode & S_IFREG) { 627 struct timeval tv[2]; 628 629 fflush(of); 630 tv[0].tv_sec = (long)(us.atime ? us.atime : us.mtime); 631 tv[1].tv_sec = (long)us.mtime; 632 tv[0].tv_usec = tv[1].tv_usec = 0; 633 if (utimes(tmppath ? tmppath : path, tv)) 634 warn("%s: utimes()", tmppath ? tmppath : path); 635 } 636 637 /* timed out or interrupted? */ 638 if (sigalrm) 639 warnx("transfer timed out"); 640 if (sigint) { 641 warnx("transfer interrupted"); 642 goto failure; 643 } 644 645 /* timeout / interrupt before connection completley established? */ 646 if (f == NULL) 647 goto failure; 648 649 if (!sigalrm) { 650 /* check the status of our files */ 651 if (ferror(f)) 652 warn("%s", URL); 653 if (ferror(of)) 654 warn("%s", path); 655 if (ferror(f) || ferror(of)) 656 goto failure; 657 } 658 659 /* did the transfer complete normally? */ 660 if (us.size != -1 && count < us.size) { 661 warnx("%s appears to be truncated: %jd/%jd bytes", 662 path, (intmax_t)count, (intmax_t)us.size); 663 goto failure_keep; 664 } 665 666 /* 667 * If the transfer timed out and we didn't know how much to 668 * expect, assume the worst (i.e. we didn't get all of it) 669 */ 670 if (sigalrm && us.size == -1) { 671 warnx("%s may be truncated", path); 672 goto failure_keep; 673 } 674 675 success: 676 r = 0; 677 if (tmppath != NULL && rename(tmppath, path) == -1) { 678 warn("%s: rename()", path); 679 goto failure_keep; 680 } 681 goto done; 682 failure: 683 if (of && of != stdout && !R_flag && !r_flag) 684 if (stat(path, &sb) != -1 && (sb.st_mode & S_IFREG)) 685 unlink(tmppath ? tmppath : path); 686 if (R_flag && tmppath != NULL && sb.st_size == -1) 687 rename(tmppath, path); /* ignore errors here */ 688 failure_keep: 689 r = -1; 690 goto done; 691 done: 692 if (f) 693 fclose(f); 694 if (of && of != stdout) 695 fclose(of); 696 if (url) 697 fetchFreeURL(url); 698 if (tmppath != NULL) 699 free(tmppath); 700 return (r); 701 } 702 703 static void 704 usage(void) 705 { 706 fprintf(stderr, "%s\n%s\n%s\n", 707 "usage: fetch [-146AFMPRUadlmnpqrsv] [-N netrc] [-o outputfile]", 708 " [-S bytes] [-B bytes] [-T seconds] [-w seconds]", 709 " [-h host -f file [-c dir] | URL ...]"); 710 } 711 712 713 /* 714 * Entry point 715 */ 716 int 717 main(int argc, char *argv[]) 718 { 719 struct stat sb; 720 struct sigaction sa; 721 const char *p, *s; 722 char *end, *q; 723 int c, e, r; 724 725 while ((c = getopt(argc, argv, 726 "146AaB:bc:dFf:Hh:lMmN:nPpo:qRrS:sT:tUvw:")) != -1) 727 switch (c) { 728 case '1': 729 once_flag = 1; 730 break; 731 case '4': 732 family = PF_INET; 733 break; 734 case '6': 735 family = PF_INET6; 736 break; 737 case 'A': 738 A_flag = 1; 739 break; 740 case 'a': 741 a_flag = 1; 742 break; 743 case 'B': 744 B_size = (off_t)strtol(optarg, &end, 10); 745 if (*optarg == '\0' || *end != '\0') 746 errx(1, "invalid buffer size (%s)", optarg); 747 break; 748 case 'b': 749 warnx("warning: the -b option is deprecated"); 750 b_flag = 1; 751 break; 752 case 'c': 753 c_dirname = optarg; 754 break; 755 case 'd': 756 d_flag = 1; 757 break; 758 case 'F': 759 F_flag = 1; 760 break; 761 case 'f': 762 f_filename = optarg; 763 break; 764 case 'H': 765 warnx("the -H option is now implicit, " 766 "use -U to disable"); 767 break; 768 case 'h': 769 h_hostname = optarg; 770 break; 771 case 'l': 772 l_flag = 1; 773 break; 774 case 'o': 775 o_flag = 1; 776 o_filename = optarg; 777 break; 778 case 'M': 779 case 'm': 780 if (r_flag) 781 errx(1, "the -m and -r flags " 782 "are mutually exclusive"); 783 m_flag = 1; 784 break; 785 case 'N': 786 N_filename = optarg; 787 break; 788 case 'n': 789 n_flag = 1; 790 break; 791 case 'P': 792 case 'p': 793 p_flag = 1; 794 break; 795 case 'q': 796 v_level = 0; 797 break; 798 case 'R': 799 R_flag = 1; 800 break; 801 case 'r': 802 if (m_flag) 803 errx(1, "the -m and -r flags " 804 "are mutually exclusive"); 805 r_flag = 1; 806 break; 807 case 'S': 808 S_size = (off_t)strtol(optarg, &end, 10); 809 if (*optarg == '\0' || *end != '\0') 810 errx(1, "invalid size (%s)", optarg); 811 break; 812 case 's': 813 s_flag = 1; 814 break; 815 case 'T': 816 T_secs = strtol(optarg, &end, 10); 817 if (*optarg == '\0' || *end != '\0') 818 errx(1, "invalid timeout (%s)", optarg); 819 break; 820 case 't': 821 t_flag = 1; 822 warnx("warning: the -t option is deprecated"); 823 break; 824 case 'U': 825 U_flag = 1; 826 break; 827 case 'v': 828 v_level++; 829 break; 830 case 'w': 831 a_flag = 1; 832 w_secs = strtol(optarg, &end, 10); 833 if (*optarg == '\0' || *end != '\0') 834 errx(1, "invalid delay (%s)", optarg); 835 break; 836 default: 837 usage(); 838 exit(EX_USAGE); 839 } 840 841 argc -= optind; 842 argv += optind; 843 844 if (h_hostname || f_filename || c_dirname) { 845 if (!h_hostname || !f_filename || argc) { 846 usage(); 847 exit(EX_USAGE); 848 } 849 /* XXX this is a hack. */ 850 if (strcspn(h_hostname, "@:/") != strlen(h_hostname)) 851 errx(1, "invalid hostname"); 852 if (asprintf(argv, "ftp://%s/%s/%s", h_hostname, 853 c_dirname ? c_dirname : "", f_filename) == -1) 854 errx(1, "%s", strerror(ENOMEM)); 855 argc++; 856 } 857 858 if (!argc) { 859 usage(); 860 exit(EX_USAGE); 861 } 862 863 /* allocate buffer */ 864 if (B_size < MINBUFSIZE) 865 B_size = MINBUFSIZE; 866 if ((buf = malloc(B_size)) == NULL) 867 errx(1, "%s", strerror(ENOMEM)); 868 869 /* timeouts */ 870 if ((s = getenv("FTP_TIMEOUT")) != NULL) { 871 ftp_timeout = strtol(s, &end, 10); 872 if (*s == '\0' || *end != '\0' || ftp_timeout < 0) { 873 warnx("FTP_TIMEOUT (%s) is not a positive integer", s); 874 ftp_timeout = 0; 875 } 876 } 877 if ((s = getenv("HTTP_TIMEOUT")) != NULL) { 878 http_timeout = strtol(s, &end, 10); 879 if (*s == '\0' || *end != '\0' || http_timeout < 0) { 880 warnx("HTTP_TIMEOUT (%s) is not a positive integer", s); 881 http_timeout = 0; 882 } 883 } 884 885 /* signal handling */ 886 sa.sa_flags = 0; 887 sa.sa_handler = sig_handler; 888 sigemptyset(&sa.sa_mask); 889 sigaction(SIGALRM, &sa, NULL); 890 sa.sa_flags = SA_RESETHAND; 891 sigaction(SIGINT, &sa, NULL); 892 fetchRestartCalls = 0; 893 894 /* output file */ 895 if (o_flag) { 896 if (strcmp(o_filename, "-") == 0) { 897 o_stdout = 1; 898 } else if (stat(o_filename, &sb) == -1) { 899 if (errno == ENOENT) { 900 if (argc > 1) 901 errx(EX_USAGE, "%s is not a directory", 902 o_filename); 903 } else { 904 err(EX_IOERR, "%s", o_filename); 905 } 906 } else { 907 if (sb.st_mode & S_IFDIR) 908 o_directory = 1; 909 } 910 } 911 912 /* check if output is to a tty (for progress report) */ 913 v_tty = isatty(STDERR_FILENO); 914 if (v_tty) 915 pgrp = getpgrp(); 916 917 r = 0; 918 919 /* authentication */ 920 if (v_tty) 921 fetchAuthMethod = query_auth; 922 if (N_filename != NULL) 923 setenv("NETRC", N_filename, 1); 924 925 while (argc) { 926 if ((p = strrchr(*argv, '/')) == NULL) 927 p = *argv; 928 else 929 p++; 930 931 if (!*p) 932 p = "fetch.out"; 933 934 fetchLastErrCode = 0; 935 936 if (o_flag) { 937 if (o_stdout) { 938 e = fetch(*argv, "-"); 939 } else if (o_directory) { 940 asprintf(&q, "%s/%s", o_filename, p); 941 e = fetch(*argv, q); 942 free(q); 943 } else { 944 e = fetch(*argv, o_filename); 945 } 946 } else { 947 e = fetch(*argv, p); 948 } 949 950 if (sigint) 951 kill(getpid(), SIGINT); 952 953 if (e == 0 && once_flag) 954 exit(0); 955 956 if (e) { 957 r = 1; 958 if ((fetchLastErrCode 959 && fetchLastErrCode != FETCH_UNAVAIL 960 && fetchLastErrCode != FETCH_MOVED 961 && fetchLastErrCode != FETCH_URL 962 && fetchLastErrCode != FETCH_RESOLV 963 && fetchLastErrCode != FETCH_UNKNOWN)) { 964 if (w_secs && v_level) 965 fprintf(stderr, "Waiting %ld seconds " 966 "before retrying\n", w_secs); 967 if (w_secs) 968 sleep(w_secs); 969 if (a_flag) 970 continue; 971 } 972 } 973 974 argc--, argv++; 975 } 976 977 exit(r); 978 } 979