1 /*- 2 * Copyright (c) 2000 Dag-Erling Co�dan Sm�rgrav 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer 10 * in this position and unchanged. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. The name of the author may not be used to endorse or promote products 15 * derived from this software without specific prior written permission 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 * 28 * $FreeBSD: src/usr.bin/fetch/fetch.c,v 1.10.2.21 2003/06/06 06:48:42 des Exp $ 29 * $DragonFly: src/usr.bin/fetch/fetch.c,v 1.2 2003/06/17 04:29:26 dillon Exp $ 30 */ 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 <stdio.h> 42 #include <stdlib.h> 43 #include <string.h> 44 #include <sysexits.h> 45 #include <termios.h> 46 #include <unistd.h> 47 48 #include <fetch.h> 49 50 #define MINBUFSIZE 4096 51 52 /* Option flags */ 53 int A_flag; /* -A: do not follow 302 redirects */ 54 int a_flag; /* -a: auto retry */ 55 off_t B_size; /* -B: buffer size */ 56 int b_flag; /*! -b: workaround TCP bug */ 57 char *c_dirname; /* -c: remote directory */ 58 int d_flag; /* -d: direct connection */ 59 int F_flag; /* -F: restart without checking mtime */ 60 char *f_filename; /* -f: file to fetch */ 61 char *h_hostname; /* -h: host to fetch from */ 62 int l_flag; /* -l: link rather than copy file: URLs */ 63 int m_flag; /* -[Mm]: mirror mode */ 64 char *N_filename; /* -N: netrc file name */ 65 int n_flag; /* -n: do not preserve modification time */ 66 int o_flag; /* -o: specify output file */ 67 int o_directory; /* output file is a directory */ 68 char *o_filename; /* name of output file */ 69 int o_stdout; /* output file is stdout */ 70 int once_flag; /* -1: stop at first successful file */ 71 int p_flag; /* -[Pp]: use passive FTP */ 72 int R_flag; /* -R: don't delete partially transferred files */ 73 int r_flag; /* -r: restart previously interrupted transfer */ 74 off_t S_size; /* -S: require size to match */ 75 int s_flag; /* -s: show size, don't fetch */ 76 long T_secs = 120; /* -T: transfer timeout in seconds */ 77 int t_flag; /*! -t: workaround TCP bug */ 78 int U_flag; /* -U: do not use high ports */ 79 int v_level = 1; /* -v: verbosity level */ 80 int v_tty; /* stdout is a tty */ 81 pid_t pgrp; /* our process group */ 82 long w_secs; /* -w: retry delay */ 83 int family = PF_UNSPEC; /* -[46]: address family to use */ 84 85 int sigalrm; /* SIGALRM received */ 86 int siginfo; /* SIGINFO received */ 87 int sigint; /* SIGINT received */ 88 89 long ftp_timeout; /* default timeout for FTP transfers */ 90 long http_timeout; /* default timeout for HTTP transfers */ 91 u_char *buf; /* transfer buffer */ 92 93 94 /* 95 * Signal handler 96 */ 97 static void 98 sig_handler(int sig) 99 { 100 switch (sig) { 101 case SIGALRM: 102 sigalrm = 1; 103 break; 104 case SIGINFO: 105 siginfo = 1; 106 break; 107 case SIGINT: 108 sigint = 1; 109 break; 110 } 111 } 112 113 struct xferstat { 114 char name[40]; 115 struct timeval start; 116 struct timeval last; 117 off_t size; 118 off_t offset; 119 off_t rcvd; 120 }; 121 122 /* 123 * Compute and display ETA 124 */ 125 static void 126 stat_eta(struct xferstat *xs) 127 { 128 long elapsed, received, expected, eta; 129 130 elapsed = xs->last.tv_sec - xs->start.tv_sec; 131 received = xs->rcvd - xs->offset; 132 expected = xs->size - xs->rcvd; 133 eta = (long)((double)elapsed * expected / received); 134 if (eta > 3600) { 135 fprintf(stderr, "%02ld:", eta / 3600); 136 eta %= 3600; 137 } 138 fprintf(stderr, "%02ld:%02ld", eta / 60, eta % 60); 139 } 140 141 /* 142 * Compute and display transfer rate 143 */ 144 static void 145 stat_bps(struct xferstat *xs) 146 { 147 double delta, bps; 148 149 delta = (xs->last.tv_sec + (xs->last.tv_usec / 1.e6)) 150 - (xs->start.tv_sec + (xs->start.tv_usec / 1.e6)); 151 if (delta == 0.0) { 152 fprintf(stderr, "?? Bps"); 153 return; 154 } 155 bps = (xs->rcvd - xs->offset) / delta; 156 if (bps > 1024*1024) 157 fprintf(stderr, "%.2f MBps", bps / (1024*1024)); 158 else if (bps > 1024) 159 fprintf(stderr, "%.2f kBps", bps / 1024); 160 else 161 fprintf(stderr, "%.2f Bps", bps); 162 } 163 164 /* 165 * Update the stats display 166 */ 167 static void 168 stat_display(struct xferstat *xs, int force) 169 { 170 struct timeval now; 171 int ctty_pgrp; 172 173 if (!v_tty || !v_level) 174 return; 175 176 /* check if we're the foreground process */ 177 if (ioctl(STDERR_FILENO, TIOCGPGRP, &ctty_pgrp) == -1 || 178 (pid_t)ctty_pgrp != pgrp) 179 return; 180 181 gettimeofday(&now, NULL); 182 if (!force && now.tv_sec <= xs->last.tv_sec) 183 return; 184 xs->last = now; 185 186 fprintf(stderr, "\rReceiving %s", xs->name); 187 if (xs->size <= 0) { 188 fprintf(stderr, ": %lld bytes", (long long)xs->rcvd); 189 } else { 190 fprintf(stderr, " (%lld bytes): %d%%", (long long)xs->size, 191 (int)((100.0 * xs->rcvd) / xs->size)); 192 if (xs->rcvd > 0 && xs->last.tv_sec >= xs->start.tv_sec + 30) { 193 fprintf(stderr, " (ETA "); 194 stat_eta(xs); 195 if (v_level > 1) { 196 fprintf(stderr, " at "); 197 stat_bps(xs); 198 } 199 fprintf(stderr, ") "); 200 } 201 } 202 } 203 204 /* 205 * Initialize the transfer statistics 206 */ 207 static void 208 stat_start(struct xferstat *xs, const char *name, off_t size, off_t offset) 209 { 210 snprintf(xs->name, sizeof xs->name, "%s", name); 211 gettimeofday(&xs->start, NULL); 212 xs->last.tv_sec = xs->last.tv_usec = 0; 213 xs->size = size; 214 xs->offset = offset; 215 xs->rcvd = offset; 216 stat_display(xs, 1); 217 } 218 219 /* 220 * Update the transfer statistics 221 */ 222 static void 223 stat_update(struct xferstat *xs, off_t rcvd) 224 { 225 xs->rcvd = rcvd; 226 stat_display(xs, 0); 227 } 228 229 /* 230 * Finalize the transfer statistics 231 */ 232 static void 233 stat_end(struct xferstat *xs) 234 { 235 double delta; 236 237 if (!v_level) 238 return; 239 240 gettimeofday(&xs->last, NULL); 241 242 stat_display(xs, 1); 243 fputc('\n', stderr); 244 delta = (xs->last.tv_sec + (xs->last.tv_usec / 1.e6)) 245 - (xs->start.tv_sec + (xs->start.tv_usec / 1.e6)); 246 fprintf(stderr, "%lld bytes transferred in %.1f seconds (", 247 (long long)(xs->rcvd - xs->offset), delta); 248 stat_bps(xs); 249 fprintf(stderr, ")\n"); 250 } 251 252 /* 253 * Ask the user for authentication details 254 */ 255 static int 256 query_auth(struct url *URL) 257 { 258 struct termios tios; 259 tcflag_t saved_flags; 260 int i, nopwd; 261 262 263 fprintf(stderr, "Authentication required for <%s://%s:%d/>!\n", 264 URL->scheme, URL->host, URL->port); 265 266 fprintf(stderr, "Login: "); 267 if (fgets(URL->user, sizeof URL->user, stdin) == NULL) 268 return -1; 269 for (i = 0; URL->user[i]; ++i) 270 if (isspace(URL->user[i])) 271 URL->user[i] = '\0'; 272 273 fprintf(stderr, "Password: "); 274 if (tcgetattr(STDIN_FILENO, &tios) == 0) { 275 saved_flags = tios.c_lflag; 276 tios.c_lflag &= ~ECHO; 277 tios.c_lflag |= ECHONL|ICANON; 278 tcsetattr(STDIN_FILENO, TCSAFLUSH|TCSASOFT, &tios); 279 nopwd = (fgets(URL->pwd, sizeof URL->pwd, stdin) == NULL); 280 tios.c_lflag = saved_flags; 281 tcsetattr(STDIN_FILENO, TCSANOW|TCSASOFT, &tios); 282 } else { 283 nopwd = (fgets(URL->pwd, sizeof URL->pwd, stdin) == NULL); 284 } 285 if (nopwd) 286 return -1; 287 288 for (i = 0; URL->pwd[i]; ++i) 289 if (isspace(URL->pwd[i])) 290 URL->pwd[i] = '\0'; 291 return 0; 292 } 293 294 /* 295 * Fetch a file 296 */ 297 static int 298 fetch(char *URL, const char *path) 299 { 300 struct url *url; 301 struct url_stat us; 302 struct stat sb, nsb; 303 struct xferstat xs; 304 FILE *f, *of; 305 size_t size, wr; 306 off_t count; 307 char flags[8]; 308 const char *slash; 309 char *tmppath; 310 int r; 311 u_int timeout; 312 u_char *ptr; 313 314 f = of = NULL; 315 tmppath = NULL; 316 317 timeout = 0; 318 *flags = 0; 319 count = 0; 320 321 /* set verbosity level */ 322 if (v_level > 1) 323 strcat(flags, "v"); 324 if (v_level > 2) 325 fetchDebug = 1; 326 327 /* parse URL */ 328 if ((url = fetchParseURL(URL)) == NULL) { 329 warnx("%s: parse error", URL); 330 goto failure; 331 } 332 333 /* if no scheme was specified, take a guess */ 334 if (!*url->scheme) { 335 if (!*url->host) 336 strcpy(url->scheme, SCHEME_FILE); 337 else if (strncasecmp(url->host, "ftp.", 4) == 0) 338 strcpy(url->scheme, SCHEME_FTP); 339 else if (strncasecmp(url->host, "www.", 4) == 0) 340 strcpy(url->scheme, SCHEME_HTTP); 341 } 342 343 /* common flags */ 344 switch (family) { 345 case PF_INET: 346 strcat(flags, "4"); 347 break; 348 case PF_INET6: 349 strcat(flags, "6"); 350 break; 351 } 352 353 /* FTP specific flags */ 354 if (strcmp(url->scheme, "ftp") == 0) { 355 if (p_flag) 356 strcat(flags, "p"); 357 if (d_flag) 358 strcat(flags, "d"); 359 if (U_flag) 360 strcat(flags, "l"); 361 timeout = T_secs ? T_secs : ftp_timeout; 362 } 363 364 /* HTTP specific flags */ 365 if (strcmp(url->scheme, "http") == 0) { 366 if (d_flag) 367 strcat(flags, "d"); 368 if (A_flag) 369 strcat(flags, "A"); 370 timeout = T_secs ? T_secs : http_timeout; 371 } 372 373 /* set the protocol timeout. */ 374 fetchTimeout = timeout; 375 376 /* just print size */ 377 if (s_flag) { 378 if (timeout) 379 alarm(timeout); 380 r = fetchStat(url, &us, flags); 381 if (timeout) 382 alarm(0); 383 if (sigalrm || sigint) 384 goto signal; 385 if (r == -1) { 386 warnx("%s", fetchLastErrString); 387 goto failure; 388 } 389 if (us.size == -1) 390 printf("Unknown\n"); 391 else 392 printf("%lld\n", (long long)us.size); 393 goto success; 394 } 395 396 /* 397 * If the -r flag was specified, we have to compare the local 398 * and remote files, so we should really do a fetchStat() 399 * first, but I know of at least one HTTP server that only 400 * sends the content size in response to GET requests, and 401 * leaves it out of replies to HEAD requests. Also, in the 402 * (frequent) case that the local and remote files match but 403 * the local file is truncated, we have sufficient information 404 * before the compare to issue a correct request. Therefore, 405 * we always issue a GET request as if we were sure the local 406 * file was a truncated copy of the remote file; we can drop 407 * the connection later if we change our minds. 408 */ 409 sb.st_size = -1; 410 if (!o_stdout && stat(path, &sb) == -1 && errno != ENOENT) { 411 warnx("%s: stat()", path); 412 goto failure; 413 } 414 if (!o_stdout && r_flag && S_ISREG(sb.st_mode)) 415 url->offset = sb.st_size; 416 417 /* start the transfer */ 418 if (timeout) 419 alarm(timeout); 420 f = fetchXGet(url, &us, flags); 421 if (timeout) 422 alarm(0); 423 if (sigalrm || sigint) 424 goto signal; 425 if (f == NULL) { 426 warnx("%s: %s", URL, fetchLastErrString); 427 goto failure; 428 } 429 if (sigint) 430 goto signal; 431 432 /* check that size is as expected */ 433 if (S_size) { 434 if (us.size == -1) { 435 warnx("%s: size unknown", URL); 436 goto failure; 437 } else if (us.size != S_size) { 438 warnx("%s: size mismatch: expected %lld, actual %lld", 439 URL, (long long)S_size, (long long)us.size); 440 goto failure; 441 } 442 } 443 444 /* symlink instead of copy */ 445 if (l_flag && strcmp(url->scheme, "file") == 0 && !o_stdout) { 446 if (symlink(url->doc, path) == -1) { 447 warn("%s: symlink()", path); 448 goto failure; 449 } 450 goto success; 451 } 452 453 if (us.size == -1 && !o_stdout && v_level > 0) 454 warnx("%s: size of remote file is not known", URL); 455 if (v_level > 1) { 456 if (sb.st_size != -1) 457 fprintf(stderr, "local size / mtime: %lld / %ld\n", 458 (long long)sb.st_size, (long)sb.st_mtime); 459 if (us.size != -1) 460 fprintf(stderr, "remote size / mtime: %lld / %ld\n", 461 (long long)us.size, (long)us.mtime); 462 } 463 464 /* open output file */ 465 if (o_stdout) { 466 /* output to stdout */ 467 of = stdout; 468 } else if (r_flag && sb.st_size != -1) { 469 /* resume mode, local file exists */ 470 if (!F_flag && us.mtime && sb.st_mtime != us.mtime) { 471 /* no match! have to refetch */ 472 fclose(f); 473 /* if precious, warn the user and give up */ 474 if (R_flag) { 475 warnx("%s: local modification time " 476 "does not match remote", path); 477 goto failure_keep; 478 } 479 } else { 480 if (us.size == sb.st_size) 481 /* nothing to do */ 482 goto success; 483 if (sb.st_size > us.size) { 484 /* local file too long! */ 485 warnx("%s: local file (%lld bytes) is longer " 486 "than remote file (%lld bytes)", path, 487 (long long)sb.st_size, (long long)us.size); 488 goto failure; 489 } 490 /* we got it, open local file */ 491 if ((of = fopen(path, "a")) == NULL) { 492 warn("%s: fopen()", path); 493 goto failure; 494 } 495 /* check that it didn't move under our feet */ 496 if (fstat(fileno(of), &nsb) == -1) { 497 /* can't happen! */ 498 warn("%s: fstat()", path); 499 goto failure; 500 } 501 if (nsb.st_dev != sb.st_dev || 502 nsb.st_ino != nsb.st_ino || 503 nsb.st_size != sb.st_size) { 504 warnx("%s: file has changed", URL); 505 fclose(of); 506 of = NULL; 507 sb = nsb; 508 } 509 } 510 } else if (m_flag && sb.st_size != -1) { 511 /* mirror mode, local file exists */ 512 if (sb.st_size == us.size && sb.st_mtime == us.mtime) 513 goto success; 514 } 515 516 if (of == NULL) { 517 /* 518 * We don't yet have an output file; either this is a 519 * vanilla run with no special flags, or the local and 520 * remote files didn't match. 521 */ 522 523 if (url->offset > 0) { 524 /* 525 * We tried to restart a transfer, but for 526 * some reason gave up - so we have to restart 527 * from scratch if we want the whole file 528 */ 529 url->offset = 0; 530 if ((f = fetchXGet(url, &us, flags)) == NULL) { 531 warnx("%s: %s", URL, fetchLastErrString); 532 goto failure; 533 } 534 if (sigint) 535 goto signal; 536 } 537 538 /* construct a temp file name */ 539 if (sb.st_size != -1 && S_ISREG(sb.st_mode)) { 540 if ((slash = strrchr(path, '/')) == NULL) 541 slash = path; 542 else 543 ++slash; 544 asprintf(&tmppath, "%.*s.fetch.XXXXXX.%s", 545 (int)(slash - path), path, slash); 546 if (tmppath != NULL) { 547 mkstemps(tmppath, strlen(slash) + 1); 548 of = fopen(tmppath, "w"); 549 } 550 } 551 if (of == NULL) 552 of = fopen(path, "w"); 553 if (of == NULL) { 554 warn("%s: open()", path); 555 goto failure; 556 } 557 } 558 count = url->offset; 559 560 /* start the counter */ 561 stat_start(&xs, path, us.size, count); 562 563 sigalrm = siginfo = sigint = 0; 564 565 /* suck in the data */ 566 signal(SIGINFO, sig_handler); 567 while (!sigint) { 568 if (us.size != -1 && us.size - count < B_size) 569 size = us.size - count; 570 else 571 size = B_size; 572 if (siginfo) { 573 stat_end(&xs); 574 siginfo = 0; 575 } 576 if ((size = fread(buf, 1, size, f)) == 0) { 577 if (ferror(f) && errno == EINTR && !sigint) 578 clearerr(f); 579 else 580 break; 581 } 582 stat_update(&xs, count += size); 583 for (ptr = buf; size > 0; ptr += wr, size -= wr) 584 if ((wr = fwrite(ptr, 1, size, of)) < size) { 585 if (ferror(of) && errno == EINTR && !sigint) 586 clearerr(of); 587 else 588 break; 589 } 590 if (size != 0) 591 break; 592 } 593 if (!sigalrm) 594 sigalrm = ferror(f) && errno == ETIMEDOUT; 595 signal(SIGINFO, SIG_DFL); 596 597 stat_end(&xs); 598 599 /* 600 * If the transfer timed out or was interrupted, we still want to 601 * set the mtime in case the file is not removed (-r or -R) and 602 * the user later restarts the transfer. 603 */ 604 signal: 605 /* set mtime of local file */ 606 if (!n_flag && us.mtime && !o_stdout && of != NULL && 607 (stat(path, &sb) != -1) && sb.st_mode & S_IFREG) { 608 struct timeval tv[2]; 609 610 fflush(of); 611 tv[0].tv_sec = (long)(us.atime ? us.atime : us.mtime); 612 tv[1].tv_sec = (long)us.mtime; 613 tv[0].tv_usec = tv[1].tv_usec = 0; 614 if (utimes(tmppath ? tmppath : path, tv)) 615 warn("%s: utimes()", tmppath ? tmppath : path); 616 } 617 618 /* timed out or interrupted? */ 619 if (sigalrm) 620 warnx("transfer timed out"); 621 if (sigint) { 622 warnx("transfer interrupted"); 623 goto failure; 624 } 625 626 /* timeout / interrupt before connection completley established? */ 627 if (f == NULL) 628 goto failure; 629 630 if (!sigalrm) { 631 /* check the status of our files */ 632 if (ferror(f)) 633 warn("%s", URL); 634 if (ferror(of)) 635 warn("%s", path); 636 if (ferror(f) || ferror(of)) 637 goto failure; 638 } 639 640 /* did the transfer complete normally? */ 641 if (us.size != -1 && count < us.size) { 642 warnx("%s appears to be truncated: %lld/%lld bytes", 643 path, (long long)count, (long long)us.size); 644 goto failure_keep; 645 } 646 647 /* 648 * If the transfer timed out and we didn't know how much to 649 * expect, assume the worst (i.e. we didn't get all of it) 650 */ 651 if (sigalrm && us.size == -1) { 652 warnx("%s may be truncated", path); 653 goto failure_keep; 654 } 655 656 success: 657 r = 0; 658 if (tmppath != NULL && rename(tmppath, path) == -1) { 659 warn("%s: rename()", path); 660 goto failure_keep; 661 } 662 goto done; 663 failure: 664 if (of && of != stdout && !R_flag && !r_flag) 665 if (stat(path, &sb) != -1 && (sb.st_mode & S_IFREG)) 666 unlink(tmppath ? tmppath : path); 667 if (R_flag && tmppath != NULL && sb.st_size == -1) 668 rename(tmppath, path); /* ignore errors here */ 669 failure_keep: 670 r = -1; 671 goto done; 672 done: 673 if (f) 674 fclose(f); 675 if (of && of != stdout) 676 fclose(of); 677 if (url) 678 fetchFreeURL(url); 679 if (tmppath != NULL) 680 free(tmppath); 681 return r; 682 } 683 684 static void 685 usage(void) 686 { 687 fprintf(stderr, "%s\n%s\n%s\n", 688 "usage: fetch [-146AFMPRUadlmnpqrsv] [-N netrc] [-o outputfile]", 689 " [-S bytes] [-B bytes] [-T seconds] [-w seconds]", 690 " [-h host -f file [-c dir] | URL ...]"); 691 } 692 693 694 /* 695 * Entry point 696 */ 697 int 698 main(int argc, char *argv[]) 699 { 700 struct stat sb; 701 struct sigaction sa; 702 const char *p, *s; 703 char *end, *q; 704 int c, e, r; 705 706 while ((c = getopt(argc, argv, 707 "146AaB:bc:dFf:Hh:lMmN:nPpo:qRrS:sT:tUvw:")) != -1) 708 switch (c) { 709 case '1': 710 once_flag = 1; 711 break; 712 case '4': 713 family = PF_INET; 714 break; 715 case '6': 716 family = PF_INET6; 717 break; 718 case 'A': 719 A_flag = 1; 720 break; 721 case 'a': 722 a_flag = 1; 723 break; 724 case 'B': 725 B_size = (off_t)strtol(optarg, &end, 10); 726 if (*optarg == '\0' || *end != '\0') 727 errx(1, "invalid buffer size (%s)", optarg); 728 break; 729 case 'b': 730 warnx("warning: the -b option is deprecated"); 731 b_flag = 1; 732 break; 733 case 'c': 734 c_dirname = optarg; 735 break; 736 case 'd': 737 d_flag = 1; 738 break; 739 case 'F': 740 F_flag = 1; 741 break; 742 case 'f': 743 f_filename = optarg; 744 break; 745 case 'H': 746 warnx("the -H option is now implicit, " 747 "use -U to disable"); 748 break; 749 case 'h': 750 h_hostname = optarg; 751 break; 752 case 'l': 753 l_flag = 1; 754 break; 755 case 'o': 756 o_flag = 1; 757 o_filename = optarg; 758 break; 759 case 'M': 760 case 'm': 761 if (r_flag) 762 errx(1, "the -m and -r flags " 763 "are mutually exclusive"); 764 m_flag = 1; 765 break; 766 case 'N': 767 N_filename = optarg; 768 break; 769 case 'n': 770 n_flag = 1; 771 break; 772 case 'P': 773 case 'p': 774 p_flag = 1; 775 break; 776 case 'q': 777 v_level = 0; 778 break; 779 case 'R': 780 R_flag = 1; 781 break; 782 case 'r': 783 if (m_flag) 784 errx(1, "the -m and -r flags " 785 "are mutually exclusive"); 786 r_flag = 1; 787 break; 788 case 'S': 789 S_size = (off_t)strtol(optarg, &end, 10); 790 if (*optarg == '\0' || *end != '\0') 791 errx(1, "invalid size (%s)", optarg); 792 break; 793 case 's': 794 s_flag = 1; 795 break; 796 case 'T': 797 T_secs = strtol(optarg, &end, 10); 798 if (*optarg == '\0' || *end != '\0') 799 errx(1, "invalid timeout (%s)", optarg); 800 break; 801 case 't': 802 t_flag = 1; 803 warnx("warning: the -t option is deprecated"); 804 break; 805 case 'U': 806 U_flag = 1; 807 break; 808 case 'v': 809 v_level++; 810 break; 811 case 'w': 812 a_flag = 1; 813 w_secs = strtol(optarg, &end, 10); 814 if (*optarg == '\0' || *end != '\0') 815 errx(1, "invalid delay (%s)", optarg); 816 break; 817 default: 818 usage(); 819 exit(EX_USAGE); 820 } 821 822 argc -= optind; 823 argv += optind; 824 825 if (h_hostname || f_filename || c_dirname) { 826 if (!h_hostname || !f_filename || argc) { 827 usage(); 828 exit(EX_USAGE); 829 } 830 /* XXX this is a hack. */ 831 if (strcspn(h_hostname, "@:/") != strlen(h_hostname)) 832 errx(1, "invalid hostname"); 833 if (asprintf(argv, "ftp://%s/%s/%s", h_hostname, 834 c_dirname ? c_dirname : "", f_filename) == -1) 835 errx(1, "%s", strerror(ENOMEM)); 836 argc++; 837 } 838 839 if (!argc) { 840 usage(); 841 exit(EX_USAGE); 842 } 843 844 /* allocate buffer */ 845 if (B_size < MINBUFSIZE) 846 B_size = MINBUFSIZE; 847 if ((buf = malloc(B_size)) == NULL) 848 errx(1, "%s", strerror(ENOMEM)); 849 850 /* timeouts */ 851 if ((s = getenv("FTP_TIMEOUT")) != NULL) { 852 ftp_timeout = strtol(s, &end, 10); 853 if (*s == '\0' || *end != '\0' || ftp_timeout < 0) { 854 warnx("FTP_TIMEOUT (%s) is not a positive integer", s); 855 ftp_timeout = 0; 856 } 857 } 858 if ((s = getenv("HTTP_TIMEOUT")) != NULL) { 859 http_timeout = strtol(s, &end, 10); 860 if (*s == '\0' || *end != '\0' || http_timeout < 0) { 861 warnx("HTTP_TIMEOUT (%s) is not a positive integer", s); 862 http_timeout = 0; 863 } 864 } 865 866 /* signal handling */ 867 sa.sa_flags = 0; 868 sa.sa_handler = sig_handler; 869 sigemptyset(&sa.sa_mask); 870 sigaction(SIGALRM, &sa, NULL); 871 sa.sa_flags = SA_RESETHAND; 872 sigaction(SIGINT, &sa, NULL); 873 fetchRestartCalls = 0; 874 875 /* output file */ 876 if (o_flag) { 877 if (strcmp(o_filename, "-") == 0) { 878 o_stdout = 1; 879 } else if (stat(o_filename, &sb) == -1) { 880 if (errno == ENOENT) { 881 if (argc > 1) 882 errx(EX_USAGE, "%s is not a directory", 883 o_filename); 884 } else { 885 err(EX_IOERR, "%s", o_filename); 886 } 887 } else { 888 if (sb.st_mode & S_IFDIR) 889 o_directory = 1; 890 } 891 } 892 893 /* check if output is to a tty (for progress report) */ 894 v_tty = isatty(STDERR_FILENO); 895 if (v_tty) 896 pgrp = getpgrp(); 897 898 r = 0; 899 900 /* authentication */ 901 if (v_tty) 902 fetchAuthMethod = query_auth; 903 if (N_filename != NULL) 904 setenv("NETRC", N_filename, 1); 905 906 while (argc) { 907 if ((p = strrchr(*argv, '/')) == NULL) 908 p = *argv; 909 else 910 p++; 911 912 if (!*p) 913 p = "fetch.out"; 914 915 fetchLastErrCode = 0; 916 917 if (o_flag) { 918 if (o_stdout) { 919 e = fetch(*argv, "-"); 920 } else if (o_directory) { 921 asprintf(&q, "%s/%s", o_filename, p); 922 e = fetch(*argv, q); 923 free(q); 924 } else { 925 e = fetch(*argv, o_filename); 926 } 927 } else { 928 e = fetch(*argv, p); 929 } 930 931 if (sigint) 932 kill(getpid(), SIGINT); 933 934 if (e == 0 && once_flag) 935 exit(0); 936 937 if (e) { 938 r = 1; 939 if ((fetchLastErrCode 940 && fetchLastErrCode != FETCH_UNAVAIL 941 && fetchLastErrCode != FETCH_MOVED 942 && fetchLastErrCode != FETCH_URL 943 && fetchLastErrCode != FETCH_RESOLV 944 && fetchLastErrCode != FETCH_UNKNOWN)) { 945 if (w_secs && v_level) 946 fprintf(stderr, "Waiting %ld seconds " 947 "before retrying\n", w_secs); 948 if (w_secs) 949 sleep(w_secs); 950 if (a_flag) 951 continue; 952 } 953 } 954 955 argc--, argv++; 956 } 957 958 exit(r); 959 } 960