1 /*- 2 * Copyright (c) 2000-2004 Dag-Erling Coïdan Smørgrav 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 <termios.h> 46 #include <unistd.h> 47 48 #include <fetch.h> 49 50 #define MINBUFSIZE 4096 51 #define TIMEOUT 120 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 i_flag; /* -i: specify input file for mtime comparison */ 64 char *i_filename; /* name of input file */ 65 int l_flag; /* -l: link rather than copy file: URLs */ 66 int m_flag; /* -[Mm]: mirror mode */ 67 char *N_filename; /* -N: netrc file name */ 68 int n_flag; /* -n: do not preserve modification time */ 69 int o_flag; /* -o: specify output file */ 70 int o_directory; /* output file is a directory */ 71 char *o_filename; /* name of output file */ 72 int o_stdout; /* output file is stdout */ 73 int once_flag; /* -1: stop at first successful file */ 74 int p_flag; /* -[Pp]: use passive FTP */ 75 int R_flag; /* -R: don't delete partially transferred files */ 76 int r_flag; /* -r: restart previously interrupted transfer */ 77 off_t S_size; /* -S: require size to match */ 78 int s_flag; /* -s: show size, don't fetch */ 79 long T_secs; /* -T: transfer timeout in seconds */ 80 int t_flag; /*! -t: workaround TCP bug */ 81 int U_flag; /* -U: do not use high ports */ 82 int v_level = 1; /* -v: verbosity level */ 83 int v_tty; /* stdout is a tty */ 84 pid_t pgrp; /* our process group */ 85 long w_secs; /* -w: retry delay */ 86 int family = PF_UNSPEC; /* -[46]: address family to use */ 87 88 int sigalrm; /* SIGALRM received */ 89 int siginfo; /* SIGINFO received */ 90 int sigint; /* SIGINT received */ 91 92 long ftp_timeout = TIMEOUT; /* default timeout for FTP transfers */ 93 long http_timeout = TIMEOUT; /* default timeout for HTTP transfers */ 94 char *buf; /* transfer buffer */ 95 96 97 /* 98 * Signal handler 99 */ 100 static void 101 sig_handler(int sig) 102 { 103 switch (sig) { 104 case SIGALRM: 105 sigalrm = 1; 106 break; 107 case SIGINFO: 108 siginfo = 1; 109 break; 110 case SIGINT: 111 sigint = 1; 112 break; 113 } 114 } 115 116 struct xferstat { 117 char name[64]; 118 struct timeval start; 119 struct timeval last; 120 off_t size; 121 off_t offset; 122 off_t rcvd; 123 }; 124 125 /* 126 * Compute and display ETA 127 */ 128 static const char * 129 stat_eta(struct xferstat *xs) 130 { 131 static char str[16]; 132 long elapsed, eta; 133 off_t received, expected; 134 135 elapsed = xs->last.tv_sec - xs->start.tv_sec; 136 received = xs->rcvd - xs->offset; 137 expected = xs->size - xs->rcvd; 138 eta = (long)((double)elapsed * expected / received); 139 if (eta > 3600) 140 snprintf(str, sizeof str, "%02ldh%02ldm", 141 eta / 3600, (eta % 3600) / 60); 142 else 143 snprintf(str, sizeof str, "%02ldm%02lds", 144 eta / 60, eta % 60); 145 return (str); 146 } 147 148 /* 149 * Format a number as "xxxx YB" where Y is ' ', 'k', 'M'... 150 */ 151 static const char *prefixes = " kMGTP"; 152 static const char * 153 stat_bytes(off_t bytes) 154 { 155 static char str[16]; 156 const char *prefix = prefixes; 157 158 while (bytes > 9999 && prefix[1] != '\0') { 159 bytes /= 1024; 160 prefix++; 161 } 162 snprintf(str, sizeof str, "%4jd %cB", (intmax_t)bytes, *prefix); 163 return (str); 164 } 165 166 /* 167 * Compute and display transfer rate 168 */ 169 static const char * 170 stat_bps(struct xferstat *xs) 171 { 172 static char str[16]; 173 double delta, bps; 174 175 delta = (xs->last.tv_sec + (xs->last.tv_usec / 1.e6)) 176 - (xs->start.tv_sec + (xs->start.tv_usec / 1.e6)); 177 if (delta == 0.0) { 178 snprintf(str, sizeof str, "?? Bps"); 179 } else { 180 bps = (xs->rcvd - xs->offset) / delta; 181 snprintf(str, sizeof str, "%sps", stat_bytes((off_t)bps)); 182 } 183 return (str); 184 } 185 186 /* 187 * Update the stats display 188 */ 189 static void 190 stat_display(struct xferstat *xs, int force) 191 { 192 struct timeval now; 193 int ctty_pgrp; 194 195 /* check if we're the foreground process */ 196 if (ioctl(STDERR_FILENO, TIOCGPGRP, &ctty_pgrp) == -1 || 197 (pid_t)ctty_pgrp != pgrp) 198 return; 199 200 gettimeofday(&now, NULL); 201 if (!force && now.tv_sec <= xs->last.tv_sec) 202 return; 203 xs->last = now; 204 205 fprintf(stderr, "\r%-46.46s", xs->name); 206 if (xs->size <= 0) { 207 setproctitle("%s [%s]", xs->name, stat_bytes(xs->rcvd)); 208 fprintf(stderr, " %s", stat_bytes(xs->rcvd)); 209 } else { 210 setproctitle("%s [%d%% of %s]", xs->name, 211 (int)((100.0 * xs->rcvd) / xs->size), 212 stat_bytes(xs->size)); 213 fprintf(stderr, "%3d%% of %s", 214 (int)((100.0 * xs->rcvd) / xs->size), 215 stat_bytes(xs->size)); 216 } 217 fprintf(stderr, " %s", stat_bps(xs)); 218 if (xs->size > 0 && xs->rcvd > 0 && 219 xs->last.tv_sec >= xs->start.tv_sec + 10) 220 fprintf(stderr, " %s", stat_eta(xs)); 221 } 222 223 /* 224 * Initialize the transfer statistics 225 */ 226 static void 227 stat_start(struct xferstat *xs, const char *name, off_t size, off_t offset) 228 { 229 snprintf(xs->name, sizeof xs->name, "%s", name); 230 gettimeofday(&xs->start, NULL); 231 xs->last.tv_sec = xs->last.tv_usec = 0; 232 xs->size = size; 233 xs->offset = offset; 234 xs->rcvd = offset; 235 if (v_tty && v_level > 0) 236 stat_display(xs, 1); 237 else if (v_level > 0) 238 fprintf(stderr, "%-46s", xs->name); 239 } 240 241 /* 242 * Update the transfer statistics 243 */ 244 static void 245 stat_update(struct xferstat *xs, off_t rcvd) 246 { 247 xs->rcvd = rcvd; 248 if (v_tty && v_level > 0) 249 stat_display(xs, 0); 250 } 251 252 /* 253 * Finalize the transfer statistics 254 */ 255 static void 256 stat_end(struct xferstat *xs) 257 { 258 gettimeofday(&xs->last, NULL); 259 if (v_tty && v_level > 0) { 260 stat_display(xs, 1); 261 putc('\n', stderr); 262 } else if (v_level > 0) { 263 fprintf(stderr, " %s %s\n", 264 stat_bytes(xs->size), stat_bps(xs)); 265 } 266 } 267 268 /* 269 * Ask the user for authentication details 270 */ 271 static int 272 query_auth(struct url *URL) 273 { 274 struct termios tios; 275 tcflag_t saved_flags; 276 int i, nopwd; 277 278 fprintf(stderr, "Authentication required for <%s://%s:%d/>!\n", 279 URL->scheme, URL->host, URL->port); 280 281 fprintf(stderr, "Login: "); 282 if (fgets(URL->user, sizeof URL->user, stdin) == NULL) 283 return (-1); 284 for (i = strlen(URL->user); i >= 0; --i) 285 if (URL->user[i] == '\r' || URL->user[i] == '\n') 286 URL->user[i] = '\0'; 287 288 fprintf(stderr, "Password: "); 289 if (tcgetattr(STDIN_FILENO, &tios) == 0) { 290 saved_flags = tios.c_lflag; 291 tios.c_lflag &= ~ECHO; 292 tios.c_lflag |= ECHONL|ICANON; 293 tcsetattr(STDIN_FILENO, TCSAFLUSH|TCSASOFT, &tios); 294 nopwd = (fgets(URL->pwd, sizeof URL->pwd, stdin) == NULL); 295 tios.c_lflag = saved_flags; 296 tcsetattr(STDIN_FILENO, TCSANOW|TCSASOFT, &tios); 297 } else { 298 nopwd = (fgets(URL->pwd, sizeof URL->pwd, stdin) == NULL); 299 } 300 if (nopwd) 301 return (-1); 302 for (i = strlen(URL->pwd); i >= 0; --i) 303 if (URL->pwd[i] == '\r' || URL->pwd[i] == '\n') 304 URL->pwd[i] = '\0'; 305 306 return (0); 307 } 308 309 /* 310 * Fetch a file 311 */ 312 static int 313 fetch(char *URL, const char *path) 314 { 315 struct url *url; 316 struct url_stat us; 317 struct stat sb, nsb; 318 struct xferstat xs; 319 FILE *f, *of; 320 size_t size, wr; 321 off_t count; 322 char flags[8]; 323 const char *slash; 324 char *tmppath; 325 int r; 326 unsigned timeout; 327 char *ptr; 328 329 f = of = NULL; 330 tmppath = NULL; 331 332 timeout = 0; 333 *flags = 0; 334 count = 0; 335 336 /* set verbosity level */ 337 if (v_level > 1) 338 strcat(flags, "v"); 339 if (v_level > 2) 340 fetchDebug = 1; 341 342 /* parse URL */ 343 url = NULL; 344 if (*URL == '\0') { 345 warnx("empty URL"); 346 goto failure; 347 } 348 if ((url = fetchParseURL(URL)) == NULL) { 349 warnx("%s: parse error", URL); 350 goto failure; 351 } 352 353 /* if no scheme was specified, take a guess */ 354 if (!*url->scheme) { 355 if (!*url->host) 356 strcpy(url->scheme, SCHEME_FILE); 357 else if (strncasecmp(url->host, "ftp.", 4) == 0) 358 strcpy(url->scheme, SCHEME_FTP); 359 else if (strncasecmp(url->host, "www.", 4) == 0) 360 strcpy(url->scheme, SCHEME_HTTP); 361 } 362 363 /* common flags */ 364 switch (family) { 365 case PF_INET: 366 strcat(flags, "4"); 367 break; 368 case PF_INET6: 369 strcat(flags, "6"); 370 break; 371 } 372 373 /* FTP specific flags */ 374 if (strcmp(url->scheme, SCHEME_FTP) == 0) { 375 if (p_flag) 376 strcat(flags, "p"); 377 if (d_flag) 378 strcat(flags, "d"); 379 if (U_flag) 380 strcat(flags, "l"); 381 timeout = T_secs ? T_secs : ftp_timeout; 382 } 383 384 /* HTTP specific flags */ 385 if (strcmp(url->scheme, SCHEME_HTTP) == 0 || 386 strcmp(url->scheme, SCHEME_HTTPS) == 0) { 387 if (d_flag) 388 strcat(flags, "d"); 389 if (A_flag) 390 strcat(flags, "A"); 391 timeout = T_secs ? T_secs : http_timeout; 392 if (i_flag) { 393 if (stat(i_filename, &sb)) { 394 warn("%s: stat()", i_filename); 395 goto failure; 396 } 397 url->ims_time = sb.st_mtime; 398 strcat(flags, "i"); 399 } 400 } 401 402 /* set the protocol timeout. */ 403 fetchTimeout = timeout; 404 405 /* just print size */ 406 if (s_flag) { 407 if (timeout) 408 alarm(timeout); 409 r = fetchStat(url, &us, flags); 410 if (timeout) 411 alarm(0); 412 if (sigalrm || sigint) 413 goto signal; 414 if (r == -1) { 415 warnx("%s", fetchLastErrString); 416 goto failure; 417 } 418 if (us.size == -1) 419 printf("Unknown\n"); 420 else 421 printf("%jd\n", (intmax_t)us.size); 422 goto success; 423 } 424 425 /* 426 * If the -r flag was specified, we have to compare the local 427 * and remote files, so we should really do a fetchStat() 428 * first, but I know of at least one HTTP server that only 429 * sends the content size in response to GET requests, and 430 * leaves it out of replies to HEAD requests. Also, in the 431 * (frequent) case that the local and remote files match but 432 * the local file is truncated, we have sufficient information 433 * before the compare to issue a correct request. Therefore, 434 * we always issue a GET request as if we were sure the local 435 * file was a truncated copy of the remote file; we can drop 436 * the connection later if we change our minds. 437 */ 438 sb.st_size = -1; 439 if (!o_stdout) { 440 r = stat(path, &sb); 441 if (r == 0 && r_flag && S_ISREG(sb.st_mode)) { 442 url->offset = sb.st_size; 443 } else if (r == -1 || !S_ISREG(sb.st_mode)) { 444 /* 445 * Whatever value sb.st_size has now is either 446 * wrong (if stat(2) failed) or irrelevant (if the 447 * path does not refer to a regular file) 448 */ 449 sb.st_size = -1; 450 } 451 if (r == -1 && errno != ENOENT) { 452 warnx("%s: stat()", path); 453 goto failure; 454 } 455 } 456 457 /* start the transfer */ 458 if (timeout) 459 alarm(timeout); 460 f = fetchXGet(url, &us, flags); 461 if (timeout) 462 alarm(0); 463 if (sigalrm || sigint) 464 goto signal; 465 if (f == NULL) { 466 warnx("%s: %s", URL, fetchLastErrString); 467 if (i_flag && strcmp(url->scheme, SCHEME_HTTP) == 0 468 && fetchLastErrCode == FETCH_OK 469 && strcmp(fetchLastErrString, "Not Modified") == 0) { 470 /* HTTP Not Modified Response, return OK. */ 471 r = 0; 472 goto done; 473 } else 474 goto failure; 475 } 476 if (sigint) 477 goto signal; 478 479 /* check that size is as expected */ 480 if (S_size) { 481 if (us.size == -1) { 482 warnx("%s: size unknown", URL); 483 } else if (us.size != S_size) { 484 warnx("%s: size mismatch: expected %jd, actual %jd", 485 URL, (intmax_t)S_size, (intmax_t)us.size); 486 goto failure; 487 } 488 } 489 490 /* symlink instead of copy */ 491 if (l_flag && strcmp(url->scheme, "file") == 0 && !o_stdout) { 492 if (symlink(url->doc, path) == -1) { 493 warn("%s: symlink()", path); 494 goto failure; 495 } 496 goto success; 497 } 498 499 if (us.size == -1 && !o_stdout && v_level > 0) 500 warnx("%s: size of remote file is not known", URL); 501 if (v_level > 1) { 502 if (sb.st_size != -1) 503 fprintf(stderr, "local size / mtime: %jd / %ld\n", 504 (intmax_t)sb.st_size, (long)sb.st_mtime); 505 if (us.size != -1) 506 fprintf(stderr, "remote size / mtime: %jd / %ld\n", 507 (intmax_t)us.size, (long)us.mtime); 508 } 509 510 /* open output file */ 511 if (o_stdout) { 512 /* output to stdout */ 513 of = stdout; 514 } else if (r_flag && sb.st_size != -1) { 515 /* resume mode, local file exists */ 516 if (!F_flag && us.mtime && sb.st_mtime != us.mtime) { 517 /* no match! have to refetch */ 518 fclose(f); 519 /* if precious, warn the user and give up */ 520 if (R_flag) { 521 warnx("%s: local modification time " 522 "does not match remote", path); 523 goto failure_keep; 524 } 525 } else if (us.size != -1) { 526 if (us.size == sb.st_size) 527 /* nothing to do */ 528 goto success; 529 if (sb.st_size > us.size) { 530 /* local file too long! */ 531 warnx("%s: local file (%jd bytes) is longer " 532 "than remote file (%jd bytes)", path, 533 (intmax_t)sb.st_size, (intmax_t)us.size); 534 goto failure; 535 } 536 /* we got it, open local file */ 537 if ((of = fopen(path, "a")) == NULL) { 538 warn("%s: fopen()", path); 539 goto failure; 540 } 541 /* check that it didn't move under our feet */ 542 if (fstat(fileno(of), &nsb) == -1) { 543 /* can't happen! */ 544 warn("%s: fstat()", path); 545 goto failure; 546 } 547 if (nsb.st_dev != sb.st_dev || 548 nsb.st_ino != nsb.st_ino || 549 nsb.st_size != sb.st_size) { 550 warnx("%s: file has changed", URL); 551 fclose(of); 552 of = NULL; 553 sb = nsb; 554 } 555 } 556 } else if (m_flag && sb.st_size != -1) { 557 /* mirror mode, local file exists */ 558 if (sb.st_size == us.size && sb.st_mtime == us.mtime) 559 goto success; 560 } 561 562 if (of == NULL) { 563 /* 564 * We don't yet have an output file; either this is a 565 * vanilla run with no special flags, or the local and 566 * remote files didn't match. 567 */ 568 569 if (url->offset > 0) { 570 /* 571 * We tried to restart a transfer, but for 572 * some reason gave up - so we have to restart 573 * from scratch if we want the whole file 574 */ 575 url->offset = 0; 576 if ((f = fetchXGet(url, &us, flags)) == NULL) { 577 warnx("%s: %s", URL, fetchLastErrString); 578 goto failure; 579 } 580 if (sigint) 581 goto signal; 582 } 583 584 /* construct a temp file name */ 585 if (sb.st_size != -1 && S_ISREG(sb.st_mode)) { 586 if ((slash = strrchr(path, '/')) == NULL) 587 slash = path; 588 else 589 ++slash; 590 asprintf(&tmppath, "%.*s.fetch.XXXXXX.%s", 591 (int)(slash - path), path, slash); 592 if (tmppath != NULL) { 593 mkstemps(tmppath, strlen(slash) + 1); 594 of = fopen(tmppath, "w"); 595 chown(tmppath, sb.st_uid, sb.st_gid); 596 chmod(tmppath, sb.st_mode & ALLPERMS); 597 } 598 } 599 if (of == NULL) 600 of = fopen(path, "w"); 601 if (of == NULL) { 602 warn("%s: open()", path); 603 goto failure; 604 } 605 } 606 count = url->offset; 607 608 /* start the counter */ 609 stat_start(&xs, path, us.size, count); 610 611 sigalrm = siginfo = sigint = 0; 612 613 /* suck in the data */ 614 signal(SIGINFO, sig_handler); 615 while (!sigint) { 616 if (us.size != -1 && us.size - count < B_size && 617 us.size - count >= 0) 618 size = us.size - count; 619 else 620 size = B_size; 621 if (siginfo) { 622 stat_end(&xs); 623 siginfo = 0; 624 } 625 if ((size = fread(buf, 1, size, f)) == 0) { 626 if (ferror(f) && errno == EINTR && !sigint) 627 clearerr(f); 628 else 629 break; 630 } 631 stat_update(&xs, count += size); 632 for (ptr = buf; size > 0; ptr += wr, size -= wr) 633 if ((wr = fwrite(ptr, 1, size, of)) < size) { 634 if (ferror(of) && errno == EINTR && !sigint) 635 clearerr(of); 636 else 637 break; 638 } 639 if (size != 0) 640 break; 641 } 642 if (!sigalrm) 643 sigalrm = ferror(f) && errno == ETIMEDOUT; 644 signal(SIGINFO, SIG_DFL); 645 646 stat_end(&xs); 647 648 /* 649 * If the transfer timed out or was interrupted, we still want to 650 * set the mtime in case the file is not removed (-r or -R) and 651 * the user later restarts the transfer. 652 */ 653 signal: 654 /* set mtime of local file */ 655 if (!n_flag && us.mtime && !o_stdout && of != NULL && 656 (stat(path, &sb) != -1) && sb.st_mode & S_IFREG) { 657 struct timeval tv[2]; 658 659 fflush(of); 660 tv[0].tv_sec = (long)(us.atime ? us.atime : us.mtime); 661 tv[1].tv_sec = (long)us.mtime; 662 tv[0].tv_usec = tv[1].tv_usec = 0; 663 if (utimes(tmppath ? tmppath : path, tv)) 664 warn("%s: utimes()", tmppath ? tmppath : path); 665 } 666 667 /* timed out or interrupted? */ 668 if (sigalrm) 669 warnx("transfer timed out"); 670 if (sigint) { 671 warnx("transfer interrupted"); 672 goto failure; 673 } 674 675 /* timeout / interrupt before connection completley established? */ 676 if (f == NULL) 677 goto failure; 678 679 if (!sigalrm) { 680 /* check the status of our files */ 681 if (ferror(f)) 682 warn("%s", URL); 683 if (ferror(of)) 684 warn("%s", path); 685 if (ferror(f) || ferror(of)) 686 goto failure; 687 } 688 689 /* did the transfer complete normally? */ 690 if (us.size != -1 && count < us.size) { 691 warnx("%s appears to be truncated: %jd/%jd bytes", 692 path, (intmax_t)count, (intmax_t)us.size); 693 goto failure_keep; 694 } 695 696 /* 697 * If the transfer timed out and we didn't know how much to 698 * expect, assume the worst (i.e. we didn't get all of it) 699 */ 700 if (sigalrm && us.size == -1) { 701 warnx("%s may be truncated", path); 702 goto failure_keep; 703 } 704 705 success: 706 r = 0; 707 if (tmppath != NULL && rename(tmppath, path) == -1) { 708 warn("%s: rename()", path); 709 goto failure_keep; 710 } 711 goto done; 712 failure: 713 if (of && of != stdout && !R_flag && !r_flag) 714 if (stat(path, &sb) != -1 && (sb.st_mode & S_IFREG)) 715 unlink(tmppath ? tmppath : path); 716 if (R_flag && tmppath != NULL && sb.st_size == -1) 717 rename(tmppath, path); /* ignore errors here */ 718 failure_keep: 719 r = -1; 720 goto done; 721 done: 722 if (f) 723 fclose(f); 724 if (of && of != stdout) 725 fclose(of); 726 if (url) 727 fetchFreeURL(url); 728 if (tmppath != NULL) 729 free(tmppath); 730 return (r); 731 } 732 733 static void 734 usage(void) 735 { 736 fprintf(stderr, "%s\n%s\n%s\n%s\n", 737 "usage: fetch [-146AadFlMmnPpqRrsUv] [-B bytes] [-N file] [-o file] [-S bytes]", 738 " [-T seconds] [-w seconds] [-i file] URL ...", 739 " fetch [-146AadFlMmnPpqRrsUv] [-B bytes] [-N file] [-o file] [-S bytes]", 740 " [-T seconds] [-w seconds] [-i file] -h host -f file [-c dir]"); 741 } 742 743 744 /* 745 * Entry point 746 */ 747 int 748 main(int argc, char *argv[]) 749 { 750 struct stat sb; 751 struct sigaction sa; 752 const char *p, *s; 753 char *end, *q; 754 int c, e, r; 755 756 while ((c = getopt(argc, argv, 757 "146AaB:bc:dFf:Hh:i:lMmN:nPpo:qRrS:sT:tUvw:")) != -1) 758 switch (c) { 759 case '1': 760 once_flag = 1; 761 break; 762 case '4': 763 family = PF_INET; 764 break; 765 case '6': 766 family = PF_INET6; 767 break; 768 case 'A': 769 A_flag = 1; 770 break; 771 case 'a': 772 a_flag = 1; 773 break; 774 case 'B': 775 B_size = (off_t)strtol(optarg, &end, 10); 776 if (*optarg == '\0' || *end != '\0') 777 errx(1, "invalid buffer size (%s)", optarg); 778 break; 779 case 'b': 780 warnx("warning: the -b option is deprecated"); 781 b_flag = 1; 782 break; 783 case 'c': 784 c_dirname = optarg; 785 break; 786 case 'd': 787 d_flag = 1; 788 break; 789 case 'F': 790 F_flag = 1; 791 break; 792 case 'f': 793 f_filename = optarg; 794 break; 795 case 'H': 796 warnx("the -H option is now implicit, " 797 "use -U to disable"); 798 break; 799 case 'h': 800 h_hostname = optarg; 801 break; 802 case 'i': 803 i_flag = 1; 804 i_filename = optarg; 805 break; 806 case 'l': 807 l_flag = 1; 808 break; 809 case 'o': 810 o_flag = 1; 811 o_filename = optarg; 812 break; 813 case 'M': 814 case 'm': 815 if (r_flag) 816 errx(1, "the -m and -r flags " 817 "are mutually exclusive"); 818 m_flag = 1; 819 break; 820 case 'N': 821 N_filename = optarg; 822 break; 823 case 'n': 824 n_flag = 1; 825 break; 826 case 'P': 827 case 'p': 828 p_flag = 1; 829 break; 830 case 'q': 831 v_level = 0; 832 break; 833 case 'R': 834 R_flag = 1; 835 break; 836 case 'r': 837 if (m_flag) 838 errx(1, "the -m and -r flags " 839 "are mutually exclusive"); 840 r_flag = 1; 841 break; 842 case 'S': 843 S_size = (off_t)strtol(optarg, &end, 10); 844 if (*optarg == '\0' || *end != '\0') 845 errx(1, "invalid size (%s)", optarg); 846 break; 847 case 's': 848 s_flag = 1; 849 break; 850 case 'T': 851 T_secs = strtol(optarg, &end, 10); 852 if (*optarg == '\0' || *end != '\0') 853 errx(1, "invalid timeout (%s)", optarg); 854 break; 855 case 't': 856 t_flag = 1; 857 warnx("warning: the -t option is deprecated"); 858 break; 859 case 'U': 860 U_flag = 1; 861 break; 862 case 'v': 863 v_level++; 864 break; 865 case 'w': 866 a_flag = 1; 867 w_secs = strtol(optarg, &end, 10); 868 if (*optarg == '\0' || *end != '\0') 869 errx(1, "invalid delay (%s)", optarg); 870 break; 871 default: 872 usage(); 873 exit(1); 874 } 875 876 argc -= optind; 877 argv += optind; 878 879 if (h_hostname || f_filename || c_dirname) { 880 if (!h_hostname || !f_filename || argc) { 881 usage(); 882 exit(1); 883 } 884 /* XXX this is a hack. */ 885 if (strcspn(h_hostname, "@:/") != strlen(h_hostname)) 886 errx(1, "invalid hostname"); 887 if (asprintf(argv, "ftp://%s/%s/%s", h_hostname, 888 c_dirname ? c_dirname : "", f_filename) == -1) 889 errx(1, "%s", strerror(ENOMEM)); 890 argc++; 891 } 892 893 if (!argc) { 894 usage(); 895 exit(1); 896 } 897 898 /* allocate buffer */ 899 if (B_size < MINBUFSIZE) 900 B_size = MINBUFSIZE; 901 if ((buf = malloc(B_size)) == NULL) 902 errx(1, "%s", strerror(ENOMEM)); 903 904 /* timeouts */ 905 if ((s = getenv("FTP_TIMEOUT")) != NULL) { 906 ftp_timeout = strtol(s, &end, 10); 907 if (*s == '\0' || *end != '\0' || ftp_timeout < 0) { 908 warnx("FTP_TIMEOUT (%s) is not a positive integer", s); 909 ftp_timeout = 0; 910 } 911 } 912 if ((s = getenv("HTTP_TIMEOUT")) != NULL) { 913 http_timeout = strtol(s, &end, 10); 914 if (*s == '\0' || *end != '\0' || http_timeout < 0) { 915 warnx("HTTP_TIMEOUT (%s) is not a positive integer", s); 916 http_timeout = 0; 917 } 918 } 919 920 /* signal handling */ 921 sa.sa_flags = 0; 922 sa.sa_handler = sig_handler; 923 sigemptyset(&sa.sa_mask); 924 sigaction(SIGALRM, &sa, NULL); 925 sa.sa_flags = SA_RESETHAND; 926 sigaction(SIGINT, &sa, NULL); 927 fetchRestartCalls = 0; 928 929 /* output file */ 930 if (o_flag) { 931 if (strcmp(o_filename, "-") == 0) { 932 o_stdout = 1; 933 } else if (stat(o_filename, &sb) == -1) { 934 if (errno == ENOENT) { 935 if (argc > 1) 936 errx(1, "%s is not a directory", 937 o_filename); 938 } else { 939 err(1, "%s", o_filename); 940 } 941 } else { 942 if (sb.st_mode & S_IFDIR) 943 o_directory = 1; 944 } 945 } 946 947 /* check if output is to a tty (for progress report) */ 948 v_tty = isatty(STDERR_FILENO); 949 if (v_tty) 950 pgrp = getpgrp(); 951 952 r = 0; 953 954 /* authentication */ 955 if (v_tty) 956 fetchAuthMethod = query_auth; 957 if (N_filename != NULL) 958 setenv("NETRC", N_filename, 1); 959 960 while (argc) { 961 if ((p = strrchr(*argv, '/')) == NULL) 962 p = *argv; 963 else 964 p++; 965 966 if (!*p) 967 p = "fetch.out"; 968 969 fetchLastErrCode = 0; 970 971 if (o_flag) { 972 if (o_stdout) { 973 e = fetch(*argv, "-"); 974 } else if (o_directory) { 975 asprintf(&q, "%s/%s", o_filename, p); 976 e = fetch(*argv, q); 977 free(q); 978 } else { 979 e = fetch(*argv, o_filename); 980 } 981 } else { 982 e = fetch(*argv, p); 983 } 984 985 if (sigint) 986 kill(getpid(), SIGINT); 987 988 if (e == 0 && once_flag) 989 exit(0); 990 991 if (e) { 992 r = 1; 993 if ((fetchLastErrCode 994 && fetchLastErrCode != FETCH_UNAVAIL 995 && fetchLastErrCode != FETCH_MOVED 996 && fetchLastErrCode != FETCH_URL 997 && fetchLastErrCode != FETCH_RESOLV 998 && fetchLastErrCode != FETCH_UNKNOWN)) { 999 if (w_secs && v_level) 1000 fprintf(stderr, "Waiting %ld seconds " 1001 "before retrying\n", w_secs); 1002 if (w_secs) 1003 sleep(w_secs); 1004 if (a_flag) 1005 continue; 1006 } 1007 } 1008 1009 argc--, argv++; 1010 } 1011 1012 exit(r); 1013 } 1014