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 * $FreeBSD: src/usr.bin/fetch/fetch.c,v 1.78 2006/11/10 22:05:41 des Exp $ 29 * $DragonFly: src/usr.bin/fetch/fetch.c,v 1.8 2007/08/05 21:48:12 swildner 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 <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 setproctitle("%s [%s]", xs->name, stat_bytes(xs->rcvd)); 206 fprintf(stderr, " %s", stat_bytes(xs->rcvd)); 207 } else { 208 setproctitle("%s [%d%% of %s]", xs->name, 209 (int)((100.0 * xs->rcvd) / xs->size), 210 stat_bytes(xs->size)); 211 fprintf(stderr, "%3d%% of %s", 212 (int)((100.0 * xs->rcvd) / xs->size), 213 stat_bytes(xs->size)); 214 } 215 fprintf(stderr, " %s", stat_bps(xs)); 216 if (xs->size > 0 && xs->rcvd > 0 && 217 xs->last.tv_sec >= xs->start.tv_sec + 10) 218 fprintf(stderr, " %s", stat_eta(xs)); 219 } 220 221 /* 222 * Initialize the transfer statistics 223 */ 224 static void 225 stat_start(struct xferstat *xs, const char *name, off_t size, off_t offset) 226 { 227 snprintf(xs->name, sizeof xs->name, "%s", name); 228 gettimeofday(&xs->start, NULL); 229 xs->last.tv_sec = xs->last.tv_usec = 0; 230 xs->size = size; 231 xs->offset = offset; 232 xs->rcvd = offset; 233 if (v_tty && v_level > 0) 234 stat_display(xs, 1); 235 else if (v_level > 0) 236 fprintf(stderr, "%-46s", xs->name); 237 } 238 239 /* 240 * Update the transfer statistics 241 */ 242 static void 243 stat_update(struct xferstat *xs, off_t rcvd) 244 { 245 xs->rcvd = rcvd; 246 if (v_tty && v_level > 0) 247 stat_display(xs, 0); 248 } 249 250 /* 251 * Finalize the transfer statistics 252 */ 253 static void 254 stat_end(struct xferstat *xs) 255 { 256 gettimeofday(&xs->last, NULL); 257 if (v_tty && v_level > 0) { 258 stat_display(xs, 1); 259 putc('\n', stderr); 260 } else if (v_level > 0) { 261 fprintf(stderr, " %s %s\n", 262 stat_bytes(xs->size), stat_bps(xs)); 263 } 264 } 265 266 /* 267 * Ask the user for authentication details 268 */ 269 static int 270 query_auth(struct url *URL) 271 { 272 struct termios tios; 273 tcflag_t saved_flags; 274 int i, nopwd; 275 276 fprintf(stderr, "Authentication required for <%s://%s:%d/>!\n", 277 URL->scheme, URL->host, URL->port); 278 279 fprintf(stderr, "Login: "); 280 if (fgets(URL->user, sizeof URL->user, stdin) == NULL) 281 return (-1); 282 for (i = strlen(URL->user); i >= 0; --i) 283 if (URL->user[i] == '\r' || URL->user[i] == '\n') 284 URL->user[i] = '\0'; 285 286 fprintf(stderr, "Password: "); 287 if (tcgetattr(STDIN_FILENO, &tios) == 0) { 288 saved_flags = tios.c_lflag; 289 tios.c_lflag &= ~ECHO; 290 tios.c_lflag |= ECHONL|ICANON; 291 tcsetattr(STDIN_FILENO, TCSAFLUSH|TCSASOFT, &tios); 292 nopwd = (fgets(URL->pwd, sizeof URL->pwd, stdin) == NULL); 293 tios.c_lflag = saved_flags; 294 tcsetattr(STDIN_FILENO, TCSANOW|TCSASOFT, &tios); 295 } else { 296 nopwd = (fgets(URL->pwd, sizeof URL->pwd, stdin) == NULL); 297 } 298 if (nopwd) 299 return (-1); 300 for (i = strlen(URL->pwd); i >= 0; --i) 301 if (URL->pwd[i] == '\r' || URL->pwd[i] == '\n') 302 URL->pwd[i] = '\0'; 303 304 return (0); 305 } 306 307 /* 308 * Fetch a file 309 */ 310 static int 311 fetch(char *URL, const char *path) 312 { 313 struct url *url; 314 struct url_stat us; 315 struct stat sb, nsb; 316 struct xferstat xs; 317 FILE *f, *of; 318 size_t size, wr; 319 off_t count; 320 char flags[8]; 321 const char *slash; 322 char *tmppath; 323 int r; 324 unsigned timeout; 325 char *ptr; 326 327 f = of = NULL; 328 tmppath = NULL; 329 330 timeout = 0; 331 *flags = 0; 332 count = 0; 333 334 /* set verbosity level */ 335 if (v_level > 1) 336 strcat(flags, "v"); 337 if (v_level > 2) 338 fetchDebug = 1; 339 340 /* parse URL */ 341 if ((url = fetchParseURL(URL)) == NULL) { 342 warnx("%s: parse error", URL); 343 goto failure; 344 } 345 346 /* if no scheme was specified, take a guess */ 347 if (*url->scheme == 0) { 348 if (*url->host == 0) 349 strcpy(url->scheme, SCHEME_FILE); 350 else if (strncasecmp(url->host, "ftp.", 4) == 0) 351 strcpy(url->scheme, SCHEME_FTP); 352 else if (strncasecmp(url->host, "www.", 4) == 0) 353 strcpy(url->scheme, SCHEME_HTTP); 354 } 355 356 /* common flags */ 357 switch (family) { 358 case PF_INET: 359 strcat(flags, "4"); 360 break; 361 case PF_INET6: 362 strcat(flags, "6"); 363 break; 364 } 365 366 /* FTP specific flags */ 367 if (strcmp(url->scheme, "ftp") == 0) { 368 if (p_flag) 369 strcat(flags, "p"); 370 if (d_flag) 371 strcat(flags, "d"); 372 if (U_flag) 373 strcat(flags, "l"); 374 timeout = T_secs ? T_secs : ftp_timeout; 375 } 376 377 /* HTTP specific flags */ 378 if (strcmp(url->scheme, "http") == 0) { 379 if (d_flag) 380 strcat(flags, "d"); 381 if (A_flag) 382 strcat(flags, "A"); 383 timeout = T_secs ? T_secs : http_timeout; 384 } 385 386 /* set the protocol timeout. */ 387 fetchTimeout = timeout; 388 389 /* just print size */ 390 if (s_flag) { 391 if (timeout) 392 alarm(timeout); 393 r = fetchStat(url, &us, flags); 394 if (timeout) 395 alarm(0); 396 if (sigalrm || sigint) 397 goto signal; 398 if (r == -1) { 399 warnx("%s", fetchLastErrString); 400 goto failure; 401 } 402 if (us.size == -1) 403 printf("Unknown\n"); 404 else 405 printf("%jd\n", (intmax_t)us.size); 406 goto success; 407 } 408 409 /* 410 * If the -r flag was specified, we have to compare the local 411 * and remote files, so we should really do a fetchStat() 412 * first, but I know of at least one HTTP server that only 413 * sends the content size in response to GET requests, and 414 * leaves it out of replies to HEAD requests. Also, in the 415 * (frequent) case that the local and remote files match but 416 * the local file is truncated, we have sufficient information 417 * before the compare to issue a correct request. Therefore, 418 * we always issue a GET request as if we were sure the local 419 * file was a truncated copy of the remote file; we can drop 420 * the connection later if we change our minds. 421 */ 422 sb.st_size = -1; 423 if (!o_stdout) { 424 r = stat(path, &sb); 425 if (r == 0 && r_flag && S_ISREG(sb.st_mode)) { 426 url->offset = sb.st_size; 427 } else if (r == -1 || !S_ISREG(sb.st_mode)) { 428 /* 429 * Whatever value sb.st_size has now is either 430 * wrong (if stat(2) failed) or irrelevant (if the 431 * path does not refer to a regular file) 432 */ 433 sb.st_size = -1; 434 } 435 if (r == -1 && errno != ENOENT) { 436 warnx("%s: stat()", path); 437 goto failure; 438 } 439 } 440 441 /* start the transfer */ 442 if (timeout) 443 alarm(timeout); 444 f = fetchXGet(url, &us, flags); 445 if (timeout) 446 alarm(0); 447 if (sigalrm || sigint) 448 goto signal; 449 if (f == NULL) { 450 warnx("%s: %s", URL, fetchLastErrString); 451 goto failure; 452 } 453 if (sigint) 454 goto signal; 455 456 /* check that size is as expected */ 457 if (S_size) { 458 if (us.size == -1) { 459 warnx("%s: size unknown", URL); 460 } else if (us.size != S_size) { 461 warnx("%s: size mismatch: expected %jd, actual %jd", 462 URL, (intmax_t)S_size, (intmax_t)us.size); 463 goto failure; 464 } 465 } 466 467 /* symlink instead of copy */ 468 if (l_flag && strcmp(url->scheme, "file") == 0 && !o_stdout) { 469 if (symlink(url->doc, path) == -1) { 470 warn("%s: symlink()", path); 471 goto failure; 472 } 473 goto success; 474 } 475 476 if (us.size == -1 && !o_stdout && v_level > 0) 477 warnx("%s: size of remote file is not known", URL); 478 if (v_level > 1) { 479 if (sb.st_size != -1) 480 fprintf(stderr, "local size / mtime: %jd / %ld\n", 481 (intmax_t)sb.st_size, (long)sb.st_mtime); 482 if (us.size != -1) 483 fprintf(stderr, "remote size / mtime: %jd / %ld\n", 484 (intmax_t)us.size, (long)us.mtime); 485 } 486 487 /* open output file */ 488 if (o_stdout) { 489 /* output to stdout */ 490 of = stdout; 491 } else if (r_flag && sb.st_size != -1) { 492 /* resume mode, local file exists */ 493 if (!F_flag && us.mtime && sb.st_mtime != us.mtime) { 494 /* no match! have to refetch */ 495 fclose(f); 496 /* if precious, warn the user and give up */ 497 if (R_flag) { 498 warnx("%s: local modification time " 499 "does not match remote", path); 500 goto failure_keep; 501 } 502 } else if (us.size != -1) { 503 if (us.size == sb.st_size) 504 /* nothing to do */ 505 goto success; 506 if (sb.st_size > us.size) { 507 /* local file too long! */ 508 warnx("%s: local file (%jd bytes) is longer " 509 "than remote file (%jd bytes)", path, 510 (intmax_t)sb.st_size, (intmax_t)us.size); 511 goto failure; 512 } 513 /* we got it, open local file */ 514 if ((of = fopen(path, "a")) == NULL) { 515 warn("%s: fopen()", path); 516 goto failure; 517 } 518 /* check that it didn't move under our feet */ 519 if (fstat(fileno(of), &nsb) == -1) { 520 /* can't happen! */ 521 warn("%s: fstat()", path); 522 goto failure; 523 } 524 if (nsb.st_dev != sb.st_dev || 525 nsb.st_ino != nsb.st_ino || 526 nsb.st_size != sb.st_size) { 527 warnx("%s: file has changed", URL); 528 fclose(of); 529 of = NULL; 530 sb = nsb; 531 } 532 } 533 } else if (m_flag && sb.st_size != -1) { 534 /* mirror mode, local file exists */ 535 if (sb.st_size == us.size && sb.st_mtime == us.mtime) 536 goto success; 537 } 538 539 if (of == NULL) { 540 /* 541 * We don't yet have an output file; either this is a 542 * vanilla run with no special flags, or the local and 543 * remote files didn't match. 544 */ 545 546 if (url->offset > 0) { 547 /* 548 * We tried to restart a transfer, but for 549 * some reason gave up - so we have to restart 550 * from scratch if we want the whole file 551 */ 552 url->offset = 0; 553 if ((f = fetchXGet(url, &us, flags)) == NULL) { 554 warnx("%s: %s", URL, fetchLastErrString); 555 goto failure; 556 } 557 if (sigint) 558 goto signal; 559 } 560 561 /* construct a temporary file name */ 562 if (sb.st_size != -1 && S_ISREG(sb.st_mode)) { 563 if ((slash = strrchr(path, '/')) == NULL) 564 slash = path; 565 else 566 ++slash; 567 asprintf(&tmppath, "%.*s.fetch.XXXXXX.%s", 568 (int)(slash - path), path, slash); 569 if (tmppath != NULL) { 570 if (mkstemps(tmppath, strlen(slash)+1) == -1) { 571 warn("%s: mkstemps()", path); 572 goto failure; 573 } 574 575 of = fopen(tmppath, "w"); 576 chown(tmppath, sb.st_uid, sb.st_gid); 577 chmod(tmppath, sb.st_mode & ALLPERMS); 578 } 579 } 580 581 if (of == NULL) 582 if ((of = fopen(path, "w")) == NULL) { 583 warn("%s: fopen()", path); 584 goto failure; 585 } 586 } 587 count = url->offset; 588 589 /* start the counter */ 590 stat_start(&xs, path, us.size, count); 591 592 sigalrm = siginfo = sigint = 0; 593 594 /* suck in the data */ 595 signal(SIGINFO, sig_handler); 596 while (!sigint) { 597 if (us.size != -1 && us.size - count < B_size && 598 us.size - count >= 0) 599 size = us.size - count; 600 else 601 size = B_size; 602 if (siginfo) { 603 stat_end(&xs); 604 siginfo = 0; 605 } 606 if ((size = fread(buf, 1, size, f)) == 0) { 607 if (ferror(f) && errno == EINTR && !sigint) 608 clearerr(f); 609 else 610 break; 611 } 612 stat_update(&xs, count += size); 613 for (ptr = buf; size > 0; ptr += wr, size -= wr) 614 if ((wr = fwrite(ptr, 1, size, of)) < size) { 615 if (ferror(of) && errno == EINTR && !sigint) 616 clearerr(of); 617 else 618 break; 619 } 620 if (size != 0) 621 break; 622 } 623 if (!sigalrm) 624 sigalrm = ferror(f) && errno == ETIMEDOUT; 625 signal(SIGINFO, SIG_DFL); 626 627 stat_end(&xs); 628 629 /* 630 * If the transfer timed out or was interrupted, we still want to 631 * set the mtime in case the file is not removed (-r or -R) and 632 * the user later restarts the transfer. 633 */ 634 signal: 635 /* set mtime of local file */ 636 if (!n_flag && us.mtime && !o_stdout && of != NULL && 637 (stat(path, &sb) != -1) && sb.st_mode & S_IFREG) { 638 struct timeval tv[2]; 639 640 fflush(of); 641 tv[0].tv_sec = (long)(us.atime ? us.atime : us.mtime); 642 tv[1].tv_sec = (long)us.mtime; 643 tv[0].tv_usec = tv[1].tv_usec = 0; 644 if (utimes(tmppath ? tmppath : path, tv)) 645 warn("%s: utimes()", tmppath ? tmppath : path); 646 } 647 648 /* timed out or interrupted? */ 649 if (sigalrm) 650 warnx("transfer timed out"); 651 if (sigint) { 652 warnx("transfer interrupted"); 653 goto failure; 654 } 655 656 /* timeout / interrupt before connection completley established? */ 657 if (f == NULL) 658 goto failure; 659 660 if (!sigalrm) { 661 /* check the status of our files */ 662 if (ferror(f)) 663 warn("%s", URL); 664 if (ferror(of)) 665 warn("%s", path); 666 if (ferror(f) || ferror(of)) 667 goto failure; 668 } 669 670 /* did the transfer complete normally? */ 671 if (us.size != -1 && count < us.size) { 672 warnx("%s appears to be truncated: %jd/%jd bytes", 673 path, (intmax_t)count, (intmax_t)us.size); 674 goto failure_keep; 675 } 676 677 /* 678 * If the transfer timed out and we didn't know how much to 679 * expect, assume the worst (i.e. we didn't get all of it) 680 */ 681 if (sigalrm && us.size == -1) { 682 warnx("%s may be truncated", path); 683 goto failure_keep; 684 } 685 686 success: 687 r = 0; 688 if (tmppath != NULL && rename(tmppath, path) == -1) { 689 warn("%s: rename()", path); 690 goto failure_keep; 691 } 692 goto done; 693 failure: 694 if (of && of != stdout && !R_flag && !r_flag) 695 if (stat(path, &sb) != -1 && (sb.st_mode & S_IFREG)) 696 unlink(tmppath ? tmppath : path); 697 if (R_flag && tmppath != NULL && sb.st_size == -1) 698 rename(tmppath, path); /* ignore errors here */ 699 failure_keep: 700 r = -1; 701 goto done; 702 done: 703 if (f) 704 fclose(f); 705 if (of && of != stdout) 706 fclose(of); 707 if (url) 708 fetchFreeURL(url); 709 if (tmppath != NULL) 710 free(tmppath); 711 return (r); 712 } 713 714 static void 715 usage(void) 716 { 717 fprintf(stderr, "%s\n%s\n%s\n", 718 "usage: fetch [-146AFMPRUadlmnpqrsv] [-N netrc] [-o outputfile]", 719 " [-S bytes] [-B bytes] [-T seconds] [-w seconds]", 720 " [-h host -f file [-c dir] | URL ...]"); 721 } 722 723 724 /* 725 * Entry point 726 */ 727 int 728 main(int argc, char *argv[]) 729 { 730 struct stat sb; 731 struct sigaction sa; 732 const char *p, *s; 733 char *end, *q; 734 int c, e, r; 735 736 while ((c = getopt(argc, argv, 737 "146AaB:bc:dFf:Hh:lMmN:nPpo:qRrS:sT:tUvw:")) != -1) 738 switch (c) { 739 case '1': 740 once_flag = 1; 741 break; 742 case '4': 743 family = PF_INET; 744 break; 745 case '6': 746 family = PF_INET6; 747 break; 748 case 'A': 749 A_flag = 1; 750 break; 751 case 'a': 752 a_flag = 1; 753 break; 754 case 'B': 755 B_size = (off_t)strtol(optarg, &end, 10); 756 if (*optarg == '\0' || *end != '\0') 757 errx(1, "invalid buffer size (%s)", optarg); 758 break; 759 case 'b': 760 warnx("warning: the -b option is deprecated"); 761 b_flag = 1; 762 break; 763 case 'c': 764 c_dirname = optarg; 765 break; 766 case 'd': 767 d_flag = 1; 768 break; 769 case 'F': 770 F_flag = 1; 771 break; 772 case 'f': 773 f_filename = optarg; 774 break; 775 case 'H': 776 warnx("the -H option is now implicit, " 777 "use -U to disable"); 778 break; 779 case 'h': 780 h_hostname = optarg; 781 break; 782 case 'l': 783 l_flag = 1; 784 break; 785 case 'o': 786 o_flag = 1; 787 o_filename = optarg; 788 break; 789 case 'M': 790 case 'm': 791 if (r_flag) 792 errx(1, "the -m and -r flags " 793 "are mutually exclusive"); 794 m_flag = 1; 795 break; 796 case 'N': 797 N_filename = optarg; 798 break; 799 case 'n': 800 n_flag = 1; 801 break; 802 case 'P': 803 case 'p': 804 p_flag = 1; 805 break; 806 case 'q': 807 v_level = 0; 808 break; 809 case 'R': 810 R_flag = 1; 811 break; 812 case 'r': 813 if (m_flag) 814 errx(1, "the -m and -r flags " 815 "are mutually exclusive"); 816 r_flag = 1; 817 break; 818 case 'S': 819 S_size = (off_t)strtol(optarg, &end, 10); 820 if (*optarg == '\0' || *end != '\0') 821 errx(1, "invalid size (%s)", optarg); 822 break; 823 case 's': 824 s_flag = 1; 825 break; 826 case 'T': 827 T_secs = strtol(optarg, &end, 10); 828 if (*optarg == '\0' || *end != '\0') 829 errx(1, "invalid timeout (%s)", optarg); 830 break; 831 case 't': 832 t_flag = 1; 833 warnx("warning: the -t option is deprecated"); 834 break; 835 case 'U': 836 U_flag = 1; 837 break; 838 case 'v': 839 v_level++; 840 break; 841 case 'w': 842 a_flag = 1; 843 w_secs = strtol(optarg, &end, 10); 844 if (*optarg == '\0' || *end != '\0') 845 errx(1, "invalid delay (%s)", optarg); 846 break; 847 default: 848 usage(); 849 exit(EX_USAGE); 850 } 851 852 argc -= optind; 853 argv += optind; 854 855 if (h_hostname || f_filename || c_dirname) { 856 if (!h_hostname || !f_filename || argc) { 857 usage(); 858 exit(EX_USAGE); 859 } 860 /* XXX this is a hack. */ 861 if (strcspn(h_hostname, "@:/") != strlen(h_hostname)) 862 errx(1, "invalid hostname"); 863 if (asprintf(argv, "ftp://%s/%s/%s", h_hostname, 864 c_dirname ? c_dirname : "", f_filename) == -1) 865 errx(1, "%s", strerror(ENOMEM)); 866 argc++; 867 } 868 869 if (!argc) { 870 usage(); 871 exit(EX_USAGE); 872 } 873 874 /* allocate buffer */ 875 if (B_size < MINBUFSIZE) 876 B_size = MINBUFSIZE; 877 if ((buf = malloc(B_size)) == NULL) 878 errx(1, "%s", strerror(ENOMEM)); 879 880 /* timeouts */ 881 if ((s = getenv("FTP_TIMEOUT")) != NULL) { 882 ftp_timeout = strtol(s, &end, 10); 883 if (*s == '\0' || *end != '\0' || ftp_timeout < 0) { 884 warnx("FTP_TIMEOUT (%s) is not a positive integer", s); 885 ftp_timeout = 0; 886 } 887 } 888 if ((s = getenv("HTTP_TIMEOUT")) != NULL) { 889 http_timeout = strtol(s, &end, 10); 890 if (*s == '\0' || *end != '\0' || http_timeout < 0) { 891 warnx("HTTP_TIMEOUT (%s) is not a positive integer", s); 892 http_timeout = 0; 893 } 894 } 895 896 /* signal handling */ 897 sa.sa_flags = 0; 898 sa.sa_handler = sig_handler; 899 sigemptyset(&sa.sa_mask); 900 sigaction(SIGALRM, &sa, NULL); 901 sa.sa_flags = SA_RESETHAND; 902 sigaction(SIGINT, &sa, NULL); 903 fetchRestartCalls = 0; 904 905 /* output file */ 906 if (o_flag) { 907 if (strcmp(o_filename, "-") == 0) { 908 o_stdout = 1; 909 } else if (stat(o_filename, &sb) == -1) { 910 if (errno == ENOENT) { 911 if (argc > 1) 912 errx(EX_USAGE, "%s is not a directory", 913 o_filename); 914 } else { 915 err(EX_IOERR, "%s", o_filename); 916 } 917 } else { 918 if (sb.st_mode & S_IFDIR) 919 o_directory = 1; 920 } 921 } 922 923 /* check if output is to a tty (for progress report) */ 924 v_tty = isatty(STDERR_FILENO); 925 if (v_tty) 926 pgrp = getpgrp(); 927 928 r = 0; 929 930 /* authentication */ 931 if (v_tty) 932 fetchAuthMethod = query_auth; 933 if (N_filename != NULL) { 934 if (setenv("NETRC", N_filename, 1) == -1) 935 err(1, "setenv: cannot set NETRC=%s", N_filename); 936 } 937 938 while (argc) { 939 if ((p = strrchr(*argv, '/')) == NULL) 940 p = *argv; 941 else 942 p++; 943 944 if (!*p) 945 p = "fetch.out"; 946 947 fetchLastErrCode = 0; 948 949 if (o_flag) { 950 if (o_stdout) { 951 e = fetch(*argv, "-"); 952 } else if (o_directory) { 953 asprintf(&q, "%s/%s", o_filename, p); 954 e = fetch(*argv, q); 955 free(q); 956 } else { 957 e = fetch(*argv, o_filename); 958 } 959 } else { 960 e = fetch(*argv, p); 961 } 962 963 if (sigint) 964 kill(getpid(), SIGINT); 965 966 if (e == 0 && once_flag) 967 exit(0); 968 969 if (e) { 970 r = 1; 971 if ((fetchLastErrCode 972 && fetchLastErrCode != FETCH_UNAVAIL 973 && fetchLastErrCode != FETCH_MOVED 974 && fetchLastErrCode != FETCH_URL 975 && fetchLastErrCode != FETCH_RESOLV 976 && fetchLastErrCode != FETCH_UNKNOWN)) { 977 if (w_secs && v_level) 978 fprintf(stderr, "Waiting %ld seconds " 979 "before retrying\n", w_secs); 980 if (w_secs) 981 sleep(w_secs); 982 if (a_flag) 983 continue; 984 } 985 } 986 987 argc--, argv++; 988 } 989 990 exit(r); 991 } 992