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 us.size - count >= 0) 589 size = us.size - count; 590 else 591 size = B_size; 592 if (siginfo) { 593 stat_end(&xs); 594 siginfo = 0; 595 } 596 if ((size = fread(buf, 1, size, f)) == 0) { 597 if (ferror(f) && errno == EINTR && !sigint) 598 clearerr(f); 599 else 600 break; 601 } 602 stat_update(&xs, count += size); 603 for (ptr = buf; size > 0; ptr += wr, size -= wr) 604 if ((wr = fwrite(ptr, 1, size, of)) < size) { 605 if (ferror(of) && errno == EINTR && !sigint) 606 clearerr(of); 607 else 608 break; 609 } 610 if (size != 0) 611 break; 612 } 613 if (!sigalrm) 614 sigalrm = ferror(f) && errno == ETIMEDOUT; 615 signal(SIGINFO, SIG_DFL); 616 617 stat_end(&xs); 618 619 /* 620 * If the transfer timed out or was interrupted, we still want to 621 * set the mtime in case the file is not removed (-r or -R) and 622 * the user later restarts the transfer. 623 */ 624 signal: 625 /* set mtime of local file */ 626 if (!n_flag && us.mtime && !o_stdout && of != NULL && 627 (stat(path, &sb) != -1) && sb.st_mode & S_IFREG) { 628 struct timeval tv[2]; 629 630 fflush(of); 631 tv[0].tv_sec = (long)(us.atime ? us.atime : us.mtime); 632 tv[1].tv_sec = (long)us.mtime; 633 tv[0].tv_usec = tv[1].tv_usec = 0; 634 if (utimes(tmppath ? tmppath : path, tv)) 635 warn("%s: utimes()", tmppath ? tmppath : path); 636 } 637 638 /* timed out or interrupted? */ 639 if (sigalrm) 640 warnx("transfer timed out"); 641 if (sigint) { 642 warnx("transfer interrupted"); 643 goto failure; 644 } 645 646 /* timeout / interrupt before connection completley established? */ 647 if (f == NULL) 648 goto failure; 649 650 if (!sigalrm) { 651 /* check the status of our files */ 652 if (ferror(f)) 653 warn("%s", URL); 654 if (ferror(of)) 655 warn("%s", path); 656 if (ferror(f) || ferror(of)) 657 goto failure; 658 } 659 660 /* did the transfer complete normally? */ 661 if (us.size != -1 && count < us.size) { 662 warnx("%s appears to be truncated: %jd/%jd bytes", 663 path, (intmax_t)count, (intmax_t)us.size); 664 goto failure_keep; 665 } 666 667 /* 668 * If the transfer timed out and we didn't know how much to 669 * expect, assume the worst (i.e. we didn't get all of it) 670 */ 671 if (sigalrm && us.size == -1) { 672 warnx("%s may be truncated", path); 673 goto failure_keep; 674 } 675 676 success: 677 r = 0; 678 if (tmppath != NULL && rename(tmppath, path) == -1) { 679 warn("%s: rename()", path); 680 goto failure_keep; 681 } 682 goto done; 683 failure: 684 if (of && of != stdout && !R_flag && !r_flag) 685 if (stat(path, &sb) != -1 && (sb.st_mode & S_IFREG)) 686 unlink(tmppath ? tmppath : path); 687 if (R_flag && tmppath != NULL && sb.st_size == -1) 688 rename(tmppath, path); /* ignore errors here */ 689 failure_keep: 690 r = -1; 691 goto done; 692 done: 693 if (f) 694 fclose(f); 695 if (of && of != stdout) 696 fclose(of); 697 if (url) 698 fetchFreeURL(url); 699 if (tmppath != NULL) 700 free(tmppath); 701 return (r); 702 } 703 704 static void 705 usage(void) 706 { 707 fprintf(stderr, "%s\n%s\n%s\n", 708 "usage: fetch [-146AFMPRUadlmnpqrsv] [-N netrc] [-o outputfile]", 709 " [-S bytes] [-B bytes] [-T seconds] [-w seconds]", 710 " [-h host -f file [-c dir] | URL ...]"); 711 } 712 713 714 /* 715 * Entry point 716 */ 717 int 718 main(int argc, char *argv[]) 719 { 720 struct stat sb; 721 struct sigaction sa; 722 const char *p, *s; 723 char *end, *q; 724 int c, e, r; 725 726 while ((c = getopt(argc, argv, 727 "146AaB:bc:dFf:Hh:lMmN:nPpo:qRrS:sT:tUvw:")) != -1) 728 switch (c) { 729 case '1': 730 once_flag = 1; 731 break; 732 case '4': 733 family = PF_INET; 734 break; 735 case '6': 736 family = PF_INET6; 737 break; 738 case 'A': 739 A_flag = 1; 740 break; 741 case 'a': 742 a_flag = 1; 743 break; 744 case 'B': 745 B_size = (off_t)strtol(optarg, &end, 10); 746 if (*optarg == '\0' || *end != '\0') 747 errx(1, "invalid buffer size (%s)", optarg); 748 break; 749 case 'b': 750 warnx("warning: the -b option is deprecated"); 751 b_flag = 1; 752 break; 753 case 'c': 754 c_dirname = optarg; 755 break; 756 case 'd': 757 d_flag = 1; 758 break; 759 case 'F': 760 F_flag = 1; 761 break; 762 case 'f': 763 f_filename = optarg; 764 break; 765 case 'H': 766 warnx("the -H option is now implicit, " 767 "use -U to disable"); 768 break; 769 case 'h': 770 h_hostname = optarg; 771 break; 772 case 'l': 773 l_flag = 1; 774 break; 775 case 'o': 776 o_flag = 1; 777 o_filename = optarg; 778 break; 779 case 'M': 780 case 'm': 781 if (r_flag) 782 errx(1, "the -m and -r flags " 783 "are mutually exclusive"); 784 m_flag = 1; 785 break; 786 case 'N': 787 N_filename = optarg; 788 break; 789 case 'n': 790 n_flag = 1; 791 break; 792 case 'P': 793 case 'p': 794 p_flag = 1; 795 break; 796 case 'q': 797 v_level = 0; 798 break; 799 case 'R': 800 R_flag = 1; 801 break; 802 case 'r': 803 if (m_flag) 804 errx(1, "the -m and -r flags " 805 "are mutually exclusive"); 806 r_flag = 1; 807 break; 808 case 'S': 809 S_size = (off_t)strtol(optarg, &end, 10); 810 if (*optarg == '\0' || *end != '\0') 811 errx(1, "invalid size (%s)", optarg); 812 break; 813 case 's': 814 s_flag = 1; 815 break; 816 case 'T': 817 T_secs = strtol(optarg, &end, 10); 818 if (*optarg == '\0' || *end != '\0') 819 errx(1, "invalid timeout (%s)", optarg); 820 break; 821 case 't': 822 t_flag = 1; 823 warnx("warning: the -t option is deprecated"); 824 break; 825 case 'U': 826 U_flag = 1; 827 break; 828 case 'v': 829 v_level++; 830 break; 831 case 'w': 832 a_flag = 1; 833 w_secs = strtol(optarg, &end, 10); 834 if (*optarg == '\0' || *end != '\0') 835 errx(1, "invalid delay (%s)", optarg); 836 break; 837 default: 838 usage(); 839 exit(EX_USAGE); 840 } 841 842 argc -= optind; 843 argv += optind; 844 845 if (h_hostname || f_filename || c_dirname) { 846 if (!h_hostname || !f_filename || argc) { 847 usage(); 848 exit(EX_USAGE); 849 } 850 /* XXX this is a hack. */ 851 if (strcspn(h_hostname, "@:/") != strlen(h_hostname)) 852 errx(1, "invalid hostname"); 853 if (asprintf(argv, "ftp://%s/%s/%s", h_hostname, 854 c_dirname ? c_dirname : "", f_filename) == -1) 855 errx(1, "%s", strerror(ENOMEM)); 856 argc++; 857 } 858 859 if (!argc) { 860 usage(); 861 exit(EX_USAGE); 862 } 863 864 /* allocate buffer */ 865 if (B_size < MINBUFSIZE) 866 B_size = MINBUFSIZE; 867 if ((buf = malloc(B_size)) == NULL) 868 errx(1, "%s", strerror(ENOMEM)); 869 870 /* timeouts */ 871 if ((s = getenv("FTP_TIMEOUT")) != NULL) { 872 ftp_timeout = strtol(s, &end, 10); 873 if (*s == '\0' || *end != '\0' || ftp_timeout < 0) { 874 warnx("FTP_TIMEOUT (%s) is not a positive integer", s); 875 ftp_timeout = 0; 876 } 877 } 878 if ((s = getenv("HTTP_TIMEOUT")) != NULL) { 879 http_timeout = strtol(s, &end, 10); 880 if (*s == '\0' || *end != '\0' || http_timeout < 0) { 881 warnx("HTTP_TIMEOUT (%s) is not a positive integer", s); 882 http_timeout = 0; 883 } 884 } 885 886 /* signal handling */ 887 sa.sa_flags = 0; 888 sa.sa_handler = sig_handler; 889 sigemptyset(&sa.sa_mask); 890 sigaction(SIGALRM, &sa, NULL); 891 sa.sa_flags = SA_RESETHAND; 892 sigaction(SIGINT, &sa, NULL); 893 fetchRestartCalls = 0; 894 895 /* output file */ 896 if (o_flag) { 897 if (strcmp(o_filename, "-") == 0) { 898 o_stdout = 1; 899 } else if (stat(o_filename, &sb) == -1) { 900 if (errno == ENOENT) { 901 if (argc > 1) 902 errx(EX_USAGE, "%s is not a directory", 903 o_filename); 904 } else { 905 err(EX_IOERR, "%s", o_filename); 906 } 907 } else { 908 if (sb.st_mode & S_IFDIR) 909 o_directory = 1; 910 } 911 } 912 913 /* check if output is to a tty (for progress report) */ 914 v_tty = isatty(STDERR_FILENO); 915 if (v_tty) 916 pgrp = getpgrp(); 917 918 r = 0; 919 920 /* authentication */ 921 if (v_tty) 922 fetchAuthMethod = query_auth; 923 if (N_filename != NULL) 924 setenv("NETRC", N_filename, 1); 925 926 while (argc) { 927 if ((p = strrchr(*argv, '/')) == NULL) 928 p = *argv; 929 else 930 p++; 931 932 if (!*p) 933 p = "fetch.out"; 934 935 fetchLastErrCode = 0; 936 937 if (o_flag) { 938 if (o_stdout) { 939 e = fetch(*argv, "-"); 940 } else if (o_directory) { 941 asprintf(&q, "%s/%s", o_filename, p); 942 e = fetch(*argv, q); 943 free(q); 944 } else { 945 e = fetch(*argv, o_filename); 946 } 947 } else { 948 e = fetch(*argv, p); 949 } 950 951 if (sigint) 952 kill(getpid(), SIGINT); 953 954 if (e == 0 && once_flag) 955 exit(0); 956 957 if (e) { 958 r = 1; 959 if ((fetchLastErrCode 960 && fetchLastErrCode != FETCH_UNAVAIL 961 && fetchLastErrCode != FETCH_MOVED 962 && fetchLastErrCode != FETCH_URL 963 && fetchLastErrCode != FETCH_RESOLV 964 && fetchLastErrCode != FETCH_UNKNOWN)) { 965 if (w_secs && v_level) 966 fprintf(stderr, "Waiting %ld seconds " 967 "before retrying\n", w_secs); 968 if (w_secs) 969 sleep(w_secs); 970 if (a_flag) 971 continue; 972 } 973 } 974 975 argc--, argv++; 976 } 977 978 exit(r); 979 } 980