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(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; 271 272 273 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 } else if (us.size != S_size) { 447 warnx("%s: size mismatch: expected %jd, actual %jd", 448 URL, (intmax_t)S_size, (intmax_t)us.size); 449 goto failure; 450 } 451 } 452 453 /* symlink instead of copy */ 454 if (l_flag && strcmp(url->scheme, "file") == 0 && !o_stdout) { 455 if (symlink(url->doc, path) == -1) { 456 warn("%s: symlink()", path); 457 goto failure; 458 } 459 goto success; 460 } 461 462 if (us.size == -1 && !o_stdout && v_level > 0) 463 warnx("%s: size of remote file is not known", URL); 464 if (v_level > 1) { 465 if (sb.st_size != -1) 466 fprintf(stderr, "local size / mtime: %jd / %ld\n", 467 (intmax_t)sb.st_size, (long)sb.st_mtime); 468 if (us.size != -1) 469 fprintf(stderr, "remote size / mtime: %jd / %ld\n", 470 (intmax_t)us.size, (long)us.mtime); 471 } 472 473 /* open output file */ 474 if (o_stdout) { 475 /* output to stdout */ 476 of = stdout; 477 } else if (r_flag && sb.st_size != -1) { 478 /* resume mode, local file exists */ 479 if (!F_flag && us.mtime && sb.st_mtime != us.mtime) { 480 /* no match! have to refetch */ 481 fclose(f); 482 /* if precious, warn the user and give up */ 483 if (R_flag) { 484 warnx("%s: local modification time " 485 "does not match remote", path); 486 goto failure_keep; 487 } 488 } else if (us.size != -1) { 489 if (us.size == sb.st_size) 490 /* nothing to do */ 491 goto success; 492 if (sb.st_size > us.size) { 493 /* local file too long! */ 494 warnx("%s: local file (%jd bytes) is longer " 495 "than remote file (%jd bytes)", path, 496 (intmax_t)sb.st_size, (intmax_t)us.size); 497 goto failure; 498 } 499 /* we got it, open local file */ 500 if ((of = fopen(path, "a")) == NULL) { 501 warn("%s: fopen()", path); 502 goto failure; 503 } 504 /* check that it didn't move under our feet */ 505 if (fstat(fileno(of), &nsb) == -1) { 506 /* can't happen! */ 507 warn("%s: fstat()", path); 508 goto failure; 509 } 510 if (nsb.st_dev != sb.st_dev || 511 nsb.st_ino != nsb.st_ino || 512 nsb.st_size != sb.st_size) { 513 warnx("%s: file has changed", URL); 514 fclose(of); 515 of = NULL; 516 sb = nsb; 517 } 518 } 519 } else if (m_flag && sb.st_size != -1) { 520 /* mirror mode, local file exists */ 521 if (sb.st_size == us.size && sb.st_mtime == us.mtime) 522 goto success; 523 } 524 525 if (of == NULL) { 526 /* 527 * We don't yet have an output file; either this is a 528 * vanilla run with no special flags, or the local and 529 * remote files didn't match. 530 */ 531 532 if (url->offset > 0) { 533 /* 534 * We tried to restart a transfer, but for 535 * some reason gave up - so we have to restart 536 * from scratch if we want the whole file 537 */ 538 url->offset = 0; 539 if ((f = fetchXGet(url, &us, flags)) == NULL) { 540 warnx("%s: %s", URL, fetchLastErrString); 541 goto failure; 542 } 543 if (sigint) 544 goto signal; 545 } 546 547 /* construct a temp file name */ 548 if (sb.st_size != -1 && S_ISREG(sb.st_mode)) { 549 if ((slash = strrchr(path, '/')) == NULL) 550 slash = path; 551 else 552 ++slash; 553 asprintf(&tmppath, "%.*s.fetch.XXXXXX.%s", 554 (int)(slash - path), path, slash); 555 if (tmppath != NULL) { 556 mkstemps(tmppath, strlen(slash) + 1); 557 of = fopen(tmppath, "w"); 558 } 559 } 560 if (of == NULL) 561 of = fopen(path, "w"); 562 if (of == NULL) { 563 warn("%s: open()", path); 564 goto failure; 565 } 566 } 567 count = url->offset; 568 569 /* start the counter */ 570 stat_start(&xs, path, us.size, count); 571 572 sigalrm = siginfo = sigint = 0; 573 574 /* suck in the data */ 575 signal(SIGINFO, sig_handler); 576 while (!sigint) { 577 if (us.size != -1 && us.size - count < B_size) 578 size = us.size - count; 579 else 580 size = B_size; 581 if (siginfo) { 582 stat_end(&xs); 583 siginfo = 0; 584 } 585 if ((size = fread(buf, 1, size, f)) == 0) { 586 if (ferror(f) && errno == EINTR && !sigint) 587 clearerr(f); 588 else 589 break; 590 } 591 stat_update(&xs, count += size); 592 for (ptr = buf; size > 0; ptr += wr, size -= wr) 593 if ((wr = fwrite(ptr, 1, size, of)) < size) { 594 if (ferror(of) && errno == EINTR && !sigint) 595 clearerr(of); 596 else 597 break; 598 } 599 if (size != 0) 600 break; 601 } 602 if (!sigalrm) 603 sigalrm = ferror(f) && errno == ETIMEDOUT; 604 signal(SIGINFO, SIG_DFL); 605 606 stat_end(&xs); 607 608 /* 609 * If the transfer timed out or was interrupted, we still want to 610 * set the mtime in case the file is not removed (-r or -R) and 611 * the user later restarts the transfer. 612 */ 613 signal: 614 /* set mtime of local file */ 615 if (!n_flag && us.mtime && !o_stdout && of != NULL && 616 (stat(path, &sb) != -1) && sb.st_mode & S_IFREG) { 617 struct timeval tv[2]; 618 619 fflush(of); 620 tv[0].tv_sec = (long)(us.atime ? us.atime : us.mtime); 621 tv[1].tv_sec = (long)us.mtime; 622 tv[0].tv_usec = tv[1].tv_usec = 0; 623 if (utimes(tmppath ? tmppath : path, tv)) 624 warn("%s: utimes()", tmppath ? tmppath : path); 625 } 626 627 /* timed out or interrupted? */ 628 if (sigalrm) 629 warnx("transfer timed out"); 630 if (sigint) { 631 warnx("transfer interrupted"); 632 goto failure; 633 } 634 635 /* timeout / interrupt before connection completley established? */ 636 if (f == NULL) 637 goto failure; 638 639 if (!sigalrm) { 640 /* check the status of our files */ 641 if (ferror(f)) 642 warn("%s", URL); 643 if (ferror(of)) 644 warn("%s", path); 645 if (ferror(f) || ferror(of)) 646 goto failure; 647 } 648 649 /* did the transfer complete normally? */ 650 if (us.size != -1 && count < us.size) { 651 warnx("%s appears to be truncated: %jd/%jd bytes", 652 path, (intmax_t)count, (intmax_t)us.size); 653 goto failure_keep; 654 } 655 656 /* 657 * If the transfer timed out and we didn't know how much to 658 * expect, assume the worst (i.e. we didn't get all of it) 659 */ 660 if (sigalrm && us.size == -1) { 661 warnx("%s may be truncated", path); 662 goto failure_keep; 663 } 664 665 success: 666 r = 0; 667 if (tmppath != NULL && rename(tmppath, path) == -1) { 668 warn("%s: rename()", path); 669 goto failure_keep; 670 } 671 goto done; 672 failure: 673 if (of && of != stdout && !R_flag && !r_flag) 674 if (stat(path, &sb) != -1 && (sb.st_mode & S_IFREG)) 675 unlink(tmppath ? tmppath : path); 676 if (R_flag && tmppath != NULL && sb.st_size == -1) 677 rename(tmppath, path); /* ignore errors here */ 678 failure_keep: 679 r = -1; 680 goto done; 681 done: 682 if (f) 683 fclose(f); 684 if (of && of != stdout) 685 fclose(of); 686 if (url) 687 fetchFreeURL(url); 688 if (tmppath != NULL) 689 free(tmppath); 690 return r; 691 } 692 693 static void 694 usage(void) 695 { 696 fprintf(stderr, "%s\n%s\n%s\n", 697 "usage: fetch [-146AFMPRUadlmnpqrsv] [-N netrc] [-o outputfile]", 698 " [-S bytes] [-B bytes] [-T seconds] [-w seconds]", 699 " [-h host -f file [-c dir] | URL ...]"); 700 } 701 702 703 /* 704 * Entry point 705 */ 706 int 707 main(int argc, char *argv[]) 708 { 709 struct stat sb; 710 struct sigaction sa; 711 const char *p, *s; 712 char *end, *q; 713 int c, e, r; 714 715 while ((c = getopt(argc, argv, 716 "146AaB:bc:dFf:Hh:lMmN:nPpo:qRrS:sT:tUvw:")) != -1) 717 switch (c) { 718 case '1': 719 once_flag = 1; 720 break; 721 case '4': 722 family = PF_INET; 723 break; 724 case '6': 725 family = PF_INET6; 726 break; 727 case 'A': 728 A_flag = 1; 729 break; 730 case 'a': 731 a_flag = 1; 732 break; 733 case 'B': 734 B_size = (off_t)strtol(optarg, &end, 10); 735 if (*optarg == '\0' || *end != '\0') 736 errx(1, "invalid buffer size (%s)", optarg); 737 break; 738 case 'b': 739 warnx("warning: the -b option is deprecated"); 740 b_flag = 1; 741 break; 742 case 'c': 743 c_dirname = optarg; 744 break; 745 case 'd': 746 d_flag = 1; 747 break; 748 case 'F': 749 F_flag = 1; 750 break; 751 case 'f': 752 f_filename = optarg; 753 break; 754 case 'H': 755 warnx("the -H option is now implicit, " 756 "use -U to disable"); 757 break; 758 case 'h': 759 h_hostname = optarg; 760 break; 761 case 'l': 762 l_flag = 1; 763 break; 764 case 'o': 765 o_flag = 1; 766 o_filename = optarg; 767 break; 768 case 'M': 769 case 'm': 770 if (r_flag) 771 errx(1, "the -m and -r flags " 772 "are mutually exclusive"); 773 m_flag = 1; 774 break; 775 case 'N': 776 N_filename = optarg; 777 break; 778 case 'n': 779 n_flag = 1; 780 break; 781 case 'P': 782 case 'p': 783 p_flag = 1; 784 break; 785 case 'q': 786 v_level = 0; 787 break; 788 case 'R': 789 R_flag = 1; 790 break; 791 case 'r': 792 if (m_flag) 793 errx(1, "the -m and -r flags " 794 "are mutually exclusive"); 795 r_flag = 1; 796 break; 797 case 'S': 798 S_size = (off_t)strtol(optarg, &end, 10); 799 if (*optarg == '\0' || *end != '\0') 800 errx(1, "invalid size (%s)", optarg); 801 break; 802 case 's': 803 s_flag = 1; 804 break; 805 case 'T': 806 T_secs = strtol(optarg, &end, 10); 807 if (*optarg == '\0' || *end != '\0') 808 errx(1, "invalid timeout (%s)", optarg); 809 break; 810 case 't': 811 t_flag = 1; 812 warnx("warning: the -t option is deprecated"); 813 break; 814 case 'U': 815 U_flag = 1; 816 break; 817 case 'v': 818 v_level++; 819 break; 820 case 'w': 821 a_flag = 1; 822 w_secs = strtol(optarg, &end, 10); 823 if (*optarg == '\0' || *end != '\0') 824 errx(1, "invalid delay (%s)", optarg); 825 break; 826 default: 827 usage(); 828 exit(EX_USAGE); 829 } 830 831 argc -= optind; 832 argv += optind; 833 834 if (h_hostname || f_filename || c_dirname) { 835 if (!h_hostname || !f_filename || argc) { 836 usage(); 837 exit(EX_USAGE); 838 } 839 /* XXX this is a hack. */ 840 if (strcspn(h_hostname, "@:/") != strlen(h_hostname)) 841 errx(1, "invalid hostname"); 842 if (asprintf(argv, "ftp://%s/%s/%s", h_hostname, 843 c_dirname ? c_dirname : "", f_filename) == -1) 844 errx(1, "%s", strerror(ENOMEM)); 845 argc++; 846 } 847 848 if (!argc) { 849 usage(); 850 exit(EX_USAGE); 851 } 852 853 /* allocate buffer */ 854 if (B_size < MINBUFSIZE) 855 B_size = MINBUFSIZE; 856 if ((buf = malloc(B_size)) == NULL) 857 errx(1, "%s", strerror(ENOMEM)); 858 859 /* timeouts */ 860 if ((s = getenv("FTP_TIMEOUT")) != NULL) { 861 ftp_timeout = strtol(s, &end, 10); 862 if (*s == '\0' || *end != '\0' || ftp_timeout < 0) { 863 warnx("FTP_TIMEOUT (%s) is not a positive integer", s); 864 ftp_timeout = 0; 865 } 866 } 867 if ((s = getenv("HTTP_TIMEOUT")) != NULL) { 868 http_timeout = strtol(s, &end, 10); 869 if (*s == '\0' || *end != '\0' || http_timeout < 0) { 870 warnx("HTTP_TIMEOUT (%s) is not a positive integer", s); 871 http_timeout = 0; 872 } 873 } 874 875 /* signal handling */ 876 sa.sa_flags = 0; 877 sa.sa_handler = sig_handler; 878 sigemptyset(&sa.sa_mask); 879 sigaction(SIGALRM, &sa, NULL); 880 sa.sa_flags = SA_RESETHAND; 881 sigaction(SIGINT, &sa, NULL); 882 fetchRestartCalls = 0; 883 884 /* output file */ 885 if (o_flag) { 886 if (strcmp(o_filename, "-") == 0) { 887 o_stdout = 1; 888 } else if (stat(o_filename, &sb) == -1) { 889 if (errno == ENOENT) { 890 if (argc > 1) 891 errx(EX_USAGE, "%s is not a directory", 892 o_filename); 893 } else { 894 err(EX_IOERR, "%s", o_filename); 895 } 896 } else { 897 if (sb.st_mode & S_IFDIR) 898 o_directory = 1; 899 } 900 } 901 902 /* check if output is to a tty (for progress report) */ 903 v_tty = isatty(STDERR_FILENO); 904 if (v_tty) 905 pgrp = getpgrp(); 906 907 r = 0; 908 909 /* authentication */ 910 if (v_tty) 911 fetchAuthMethod = query_auth; 912 if (N_filename != NULL) 913 setenv("NETRC", N_filename, 1); 914 915 while (argc) { 916 if ((p = strrchr(*argv, '/')) == NULL) 917 p = *argv; 918 else 919 p++; 920 921 if (!*p) 922 p = "fetch.out"; 923 924 fetchLastErrCode = 0; 925 926 if (o_flag) { 927 if (o_stdout) { 928 e = fetch(*argv, "-"); 929 } else if (o_directory) { 930 asprintf(&q, "%s/%s", o_filename, p); 931 e = fetch(*argv, q); 932 free(q); 933 } else { 934 e = fetch(*argv, o_filename); 935 } 936 } else { 937 e = fetch(*argv, p); 938 } 939 940 if (sigint) 941 kill(getpid(), SIGINT); 942 943 if (e == 0 && once_flag) 944 exit(0); 945 946 if (e) { 947 r = 1; 948 if ((fetchLastErrCode 949 && fetchLastErrCode != FETCH_UNAVAIL 950 && fetchLastErrCode != FETCH_MOVED 951 && fetchLastErrCode != FETCH_URL 952 && fetchLastErrCode != FETCH_RESOLV 953 && fetchLastErrCode != FETCH_UNKNOWN)) { 954 if (w_secs && v_level) 955 fprintf(stderr, "Waiting %ld seconds " 956 "before retrying\n", w_secs); 957 if (w_secs) 958 sleep(w_secs); 959 if (a_flag) 960 continue; 961 } 962 } 963 964 argc--, argv++; 965 } 966 967 exit(r); 968 } 969