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 * $FreeBSD: src/usr.bin/fetch/fetch.c,v 1.84 2009/01/17 13:34:56 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 <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 if ((url = fetchParseURL(URL)) == NULL) { 344 warnx("%s: parse error", URL); 345 goto failure; 346 } 347 348 /* if no scheme was specified, take a guess */ 349 if (*url->scheme == 0) { 350 if (*url->host == 0) 351 strcpy(url->scheme, SCHEME_FILE); 352 else if (strncasecmp(url->host, "ftp.", 4) == 0) 353 strcpy(url->scheme, SCHEME_FTP); 354 else if (strncasecmp(url->host, "www.", 4) == 0) 355 strcpy(url->scheme, SCHEME_HTTP); 356 } 357 358 /* common flags */ 359 switch (family) { 360 case PF_INET: 361 strcat(flags, "4"); 362 break; 363 case PF_INET6: 364 strcat(flags, "6"); 365 break; 366 } 367 368 /* FTP specific flags */ 369 if (strcmp(url->scheme, SCHEME_FTP) == 0) { 370 if (p_flag) 371 strcat(flags, "p"); 372 if (d_flag) 373 strcat(flags, "d"); 374 if (U_flag) 375 strcat(flags, "l"); 376 timeout = T_secs ? T_secs : ftp_timeout; 377 } 378 379 /* HTTP specific flags */ 380 if (strcmp(url->scheme, SCHEME_HTTP) == 0 || 381 strcmp(url->scheme, SCHEME_HTTPS) == 0) { 382 if (d_flag) 383 strcat(flags, "d"); 384 if (A_flag) 385 strcat(flags, "A"); 386 timeout = T_secs ? T_secs : http_timeout; 387 if (i_flag) { 388 if (stat(i_filename, &sb)) { 389 warn("%s: stat()", i_filename); 390 goto failure; 391 } 392 url->ims_time = sb.st_mtime; 393 strcat(flags, "i"); 394 } 395 } 396 397 /* set the protocol timeout. */ 398 fetchTimeout = timeout; 399 400 /* just print size */ 401 if (s_flag) { 402 if (timeout) 403 alarm(timeout); 404 r = fetchStat(url, &us, flags); 405 if (timeout) 406 alarm(0); 407 if (sigalrm || sigint) 408 goto signal; 409 if (r == -1) { 410 warnx("%s", fetchLastErrString); 411 goto failure; 412 } 413 if (us.size == -1) 414 printf("Unknown\n"); 415 else 416 printf("%jd\n", (intmax_t)us.size); 417 goto success; 418 } 419 420 /* 421 * If the -r flag was specified, we have to compare the local 422 * and remote files, so we should really do a fetchStat() 423 * first, but I know of at least one HTTP server that only 424 * sends the content size in response to GET requests, and 425 * leaves it out of replies to HEAD requests. Also, in the 426 * (frequent) case that the local and remote files match but 427 * the local file is truncated, we have sufficient information 428 * before the compare to issue a correct request. Therefore, 429 * we always issue a GET request as if we were sure the local 430 * file was a truncated copy of the remote file; we can drop 431 * the connection later if we change our minds. 432 */ 433 sb.st_size = -1; 434 if (!o_stdout) { 435 r = stat(path, &sb); 436 if (r == 0 && r_flag && S_ISREG(sb.st_mode)) { 437 url->offset = sb.st_size; 438 } else if (r == -1 || !S_ISREG(sb.st_mode)) { 439 /* 440 * Whatever value sb.st_size has now is either 441 * wrong (if stat(2) failed) or irrelevant (if the 442 * path does not refer to a regular file) 443 */ 444 sb.st_size = -1; 445 } 446 if (r == -1 && errno != ENOENT) { 447 warnx("%s: stat()", path); 448 goto failure; 449 } 450 } 451 452 /* start the transfer */ 453 if (timeout) 454 alarm(timeout); 455 f = fetchXGet(url, &us, flags); 456 if (timeout) 457 alarm(0); 458 if (sigalrm || sigint) 459 goto signal; 460 if (f == NULL) { 461 warnx("%s: %s", URL, fetchLastErrString); 462 if (i_flag && strcmp(url->scheme, SCHEME_HTTP) == 0 463 && fetchLastErrCode == FETCH_OK 464 && strcmp(fetchLastErrString, "Not Modified") == 0) { 465 /* HTTP Not Modified Response, return OK. */ 466 r = 0; 467 goto done; 468 } else 469 goto failure; 470 } 471 if (sigint) 472 goto signal; 473 474 /* check that size is as expected */ 475 if (S_size) { 476 if (us.size == -1) { 477 warnx("%s: size unknown", URL); 478 } else if (us.size != S_size) { 479 warnx("%s: size mismatch: expected %jd, actual %jd", 480 URL, (intmax_t)S_size, (intmax_t)us.size); 481 goto failure; 482 } 483 } 484 485 /* symlink instead of copy */ 486 if (l_flag && strcmp(url->scheme, "file") == 0 && !o_stdout) { 487 if (symlink(url->doc, path) == -1) { 488 warn("%s: symlink()", path); 489 goto failure; 490 } 491 goto success; 492 } 493 494 if (us.size == -1 && !o_stdout && v_level > 0) 495 warnx("%s: size of remote file is not known", URL); 496 if (v_level > 1) { 497 if (sb.st_size != -1) 498 fprintf(stderr, "local size / mtime: %jd / %ld\n", 499 (intmax_t)sb.st_size, (long)sb.st_mtime); 500 if (us.size != -1) 501 fprintf(stderr, "remote size / mtime: %jd / %ld\n", 502 (intmax_t)us.size, (long)us.mtime); 503 } 504 505 /* open output file */ 506 if (o_stdout) { 507 /* output to stdout */ 508 of = stdout; 509 } else if (r_flag && sb.st_size != -1) { 510 /* resume mode, local file exists */ 511 if (!F_flag && us.mtime && sb.st_mtime != us.mtime) { 512 /* no match! have to refetch */ 513 fclose(f); 514 /* if precious, warn the user and give up */ 515 if (R_flag) { 516 warnx("%s: local modification time " 517 "does not match remote", path); 518 goto failure_keep; 519 } 520 } else if (us.size != -1) { 521 if (us.size == sb.st_size) 522 /* nothing to do */ 523 goto success; 524 if (sb.st_size > us.size) { 525 /* local file too long! */ 526 warnx("%s: local file (%jd bytes) is longer " 527 "than remote file (%jd bytes)", path, 528 (intmax_t)sb.st_size, (intmax_t)us.size); 529 goto failure; 530 } 531 /* we got it, open local file */ 532 if ((of = fopen(path, "a")) == NULL) { 533 warn("%s: fopen()", path); 534 goto failure; 535 } 536 /* check that it didn't move under our feet */ 537 if (fstat(fileno(of), &nsb) == -1) { 538 /* can't happen! */ 539 warn("%s: fstat()", path); 540 goto failure; 541 } 542 if (nsb.st_dev != sb.st_dev || 543 nsb.st_ino != nsb.st_ino || 544 nsb.st_size != sb.st_size) { 545 warnx("%s: file has changed", URL); 546 fclose(of); 547 of = NULL; 548 sb = nsb; 549 } 550 } 551 } else if (m_flag && sb.st_size != -1) { 552 /* mirror mode, local file exists */ 553 if (sb.st_size == us.size && sb.st_mtime == us.mtime) 554 goto success; 555 } 556 557 if (of == NULL) { 558 /* 559 * We don't yet have an output file; either this is a 560 * vanilla run with no special flags, or the local and 561 * remote files didn't match. 562 */ 563 564 if (url->offset > 0) { 565 /* 566 * We tried to restart a transfer, but for 567 * some reason gave up - so we have to restart 568 * from scratch if we want the whole file 569 */ 570 url->offset = 0; 571 if ((f = fetchXGet(url, &us, flags)) == NULL) { 572 warnx("%s: %s", URL, fetchLastErrString); 573 goto failure; 574 } 575 if (sigint) 576 goto signal; 577 } 578 579 /* construct a temporary file name */ 580 if (sb.st_size != -1 && S_ISREG(sb.st_mode)) { 581 if ((slash = strrchr(path, '/')) == NULL) 582 slash = path; 583 else 584 ++slash; 585 asprintf(&tmppath, "%.*s.fetch.XXXXXX.%s", 586 (int)(slash - path), path, slash); 587 if (tmppath != NULL) { 588 if (mkstemps(tmppath, strlen(slash)+1) == -1) { 589 warn("%s: mkstemps()", path); 590 goto failure; 591 } 592 593 of = fopen(tmppath, "w"); 594 chown(tmppath, sb.st_uid, sb.st_gid); 595 chmod(tmppath, sb.st_mode & ALLPERMS); 596 } 597 } 598 599 if (of == NULL) 600 if ((of = fopen(path, "w")) == NULL) { 601 warn("%s: fopen()", path); 602 goto failure; 603 } 604 } 605 count = url->offset; 606 607 /* start the counter */ 608 stat_start(&xs, path, us.size, count); 609 610 sigalrm = siginfo = sigint = 0; 611 612 /* suck in the data */ 613 signal(SIGINFO, sig_handler); 614 while (!sigint) { 615 if (us.size != -1 && us.size - count < B_size && 616 us.size - count >= 0) 617 size = us.size - count; 618 else 619 size = B_size; 620 if (siginfo) { 621 stat_end(&xs); 622 siginfo = 0; 623 } 624 if ((size = fread(buf, 1, size, f)) == 0) { 625 if (ferror(f) && errno == EINTR && !sigint) 626 clearerr(f); 627 else 628 break; 629 } 630 stat_update(&xs, count += size); 631 for (ptr = buf; size > 0; ptr += wr, size -= wr) 632 if ((wr = fwrite(ptr, 1, size, of)) < size) { 633 if (ferror(of) && errno == EINTR && !sigint) 634 clearerr(of); 635 else 636 break; 637 } 638 if (size != 0) 639 break; 640 } 641 if (!sigalrm) 642 sigalrm = ferror(f) && errno == ETIMEDOUT; 643 signal(SIGINFO, SIG_DFL); 644 645 stat_end(&xs); 646 647 /* 648 * If the transfer timed out or was interrupted, we still want to 649 * set the mtime in case the file is not removed (-r or -R) and 650 * the user later restarts the transfer. 651 */ 652 signal: 653 /* set mtime of local file */ 654 if (!n_flag && us.mtime && !o_stdout && of != NULL && 655 (stat(path, &sb) != -1) && sb.st_mode & S_IFREG) { 656 struct timeval tv[2]; 657 658 fflush(of); 659 tv[0].tv_sec = (long)(us.atime ? us.atime : us.mtime); 660 tv[1].tv_sec = (long)us.mtime; 661 tv[0].tv_usec = tv[1].tv_usec = 0; 662 if (utimes(tmppath ? tmppath : path, tv)) 663 warn("%s: utimes()", tmppath ? tmppath : path); 664 } 665 666 /* timed out or interrupted? */ 667 if (sigalrm) 668 warnx("transfer timed out"); 669 if (sigint) { 670 warnx("transfer interrupted"); 671 goto failure; 672 } 673 674 /* timeout / interrupt before connection completley established? */ 675 if (f == NULL) 676 goto failure; 677 678 if (!sigalrm) { 679 /* check the status of our files */ 680 if (ferror(f)) 681 warn("%s", URL); 682 if (ferror(of)) 683 warn("%s", path); 684 if (ferror(f) || ferror(of)) 685 goto failure; 686 } 687 688 /* did the transfer complete normally? */ 689 if (us.size != -1 && count < us.size) { 690 warnx("%s appears to be truncated: %jd/%jd bytes", 691 path, (intmax_t)count, (intmax_t)us.size); 692 goto failure_keep; 693 } 694 695 /* 696 * If the transfer timed out and we didn't know how much to 697 * expect, assume the worst (i.e. we didn't get all of it) 698 */ 699 if (sigalrm && us.size == -1) { 700 warnx("%s may be truncated", path); 701 goto failure_keep; 702 } 703 704 success: 705 r = 0; 706 if (tmppath != NULL && rename(tmppath, path) == -1) { 707 warn("%s: rename()", path); 708 goto failure_keep; 709 } 710 goto done; 711 failure: 712 if (of && of != stdout && !R_flag && !r_flag) 713 if (stat(path, &sb) != -1 && (sb.st_mode & S_IFREG)) 714 unlink(tmppath ? tmppath : path); 715 if (R_flag && tmppath != NULL && sb.st_size == -1) 716 rename(tmppath, path); /* ignore errors here */ 717 failure_keep: 718 r = -1; 719 goto done; 720 done: 721 if (f) 722 fclose(f); 723 if (of && of != stdout) 724 fclose(of); 725 if (url) 726 fetchFreeURL(url); 727 if (tmppath != NULL) 728 free(tmppath); 729 return (r); 730 } 731 732 static void 733 usage(void) 734 { 735 fprintf(stderr, "%s\n%s\n%s\n%s\n", 736 "usage: fetch [-146AadFlMmnPpqRrsUv] [-B bytes] [-N file] [-o file] [-S bytes]", 737 " [-T seconds] [-w seconds] [-i file] URL ...", 738 " fetch [-146AadFlMmnPpqRrsUv] [-B bytes] [-N file] [-o file] [-S bytes]", 739 " [-T seconds] [-w seconds] [-i file] -h host -f file [-c dir]"); 740 } 741 742 743 /* 744 * Entry point 745 */ 746 int 747 main(int argc, char *argv[]) 748 { 749 struct stat sb; 750 struct sigaction sa; 751 const char *p, *s; 752 char *end, *q; 753 int c, e, r; 754 755 while ((c = getopt(argc, argv, 756 "146AaB:bc:dFf:Hh:i:lMmN:nPpo:qRrS:sT:tUvw:")) != -1) 757 switch (c) { 758 case '1': 759 once_flag = 1; 760 break; 761 case '4': 762 family = PF_INET; 763 break; 764 case '6': 765 family = PF_INET6; 766 break; 767 case 'A': 768 A_flag = 1; 769 break; 770 case 'a': 771 a_flag = 1; 772 break; 773 case 'B': 774 B_size = (off_t)strtol(optarg, &end, 10); 775 if (*optarg == '\0' || *end != '\0') 776 errx(1, "invalid buffer size (%s)", optarg); 777 break; 778 case 'b': 779 warnx("warning: the -b option is deprecated"); 780 b_flag = 1; 781 break; 782 case 'c': 783 c_dirname = optarg; 784 break; 785 case 'd': 786 d_flag = 1; 787 break; 788 case 'F': 789 F_flag = 1; 790 break; 791 case 'f': 792 f_filename = optarg; 793 break; 794 case 'H': 795 warnx("the -H option is now implicit, " 796 "use -U to disable"); 797 break; 798 case 'h': 799 h_hostname = optarg; 800 break; 801 case 'i': 802 i_flag = 1; 803 i_filename = optarg; 804 break; 805 case 'l': 806 l_flag = 1; 807 break; 808 case 'o': 809 o_flag = 1; 810 o_filename = optarg; 811 break; 812 case 'M': 813 case 'm': 814 if (r_flag) 815 errx(1, "the -m and -r flags " 816 "are mutually exclusive"); 817 m_flag = 1; 818 break; 819 case 'N': 820 N_filename = optarg; 821 break; 822 case 'n': 823 n_flag = 1; 824 break; 825 case 'P': 826 case 'p': 827 p_flag = 1; 828 break; 829 case 'q': 830 v_level = 0; 831 break; 832 case 'R': 833 R_flag = 1; 834 break; 835 case 'r': 836 if (m_flag) 837 errx(1, "the -m and -r flags " 838 "are mutually exclusive"); 839 r_flag = 1; 840 break; 841 case 'S': 842 S_size = (off_t)strtol(optarg, &end, 10); 843 if (*optarg == '\0' || *end != '\0') 844 errx(1, "invalid size (%s)", optarg); 845 break; 846 case 's': 847 s_flag = 1; 848 break; 849 case 'T': 850 T_secs = strtol(optarg, &end, 10); 851 if (*optarg == '\0' || *end != '\0') 852 errx(1, "invalid timeout (%s)", optarg); 853 break; 854 case 't': 855 t_flag = 1; 856 warnx("warning: the -t option is deprecated"); 857 break; 858 case 'U': 859 U_flag = 1; 860 break; 861 case 'v': 862 v_level++; 863 break; 864 case 'w': 865 a_flag = 1; 866 w_secs = strtol(optarg, &end, 10); 867 if (*optarg == '\0' || *end != '\0') 868 errx(1, "invalid delay (%s)", optarg); 869 break; 870 default: 871 usage(); 872 exit(1); 873 } 874 875 argc -= optind; 876 argv += optind; 877 878 if (h_hostname || f_filename || c_dirname) { 879 if (!h_hostname || !f_filename || argc) { 880 usage(); 881 exit(1); 882 } 883 /* XXX this is a hack. */ 884 if (strcspn(h_hostname, "@:/") != strlen(h_hostname)) 885 errx(1, "invalid hostname"); 886 if (asprintf(argv, "ftp://%s/%s/%s", h_hostname, 887 c_dirname ? c_dirname : "", f_filename) == -1) 888 errx(1, "%s", strerror(ENOMEM)); 889 argc++; 890 } 891 892 if (!argc) { 893 usage(); 894 exit(1); 895 } 896 897 /* allocate buffer */ 898 if (B_size < MINBUFSIZE) 899 B_size = MINBUFSIZE; 900 if ((buf = malloc(B_size)) == NULL) 901 errx(1, "%s", strerror(ENOMEM)); 902 903 /* timeouts */ 904 if ((s = getenv("FTP_TIMEOUT")) != NULL) { 905 ftp_timeout = strtol(s, &end, 10); 906 if (*s == '\0' || *end != '\0' || ftp_timeout < 0) { 907 warnx("FTP_TIMEOUT (%s) is not a positive integer", s); 908 ftp_timeout = 0; 909 } 910 } 911 if ((s = getenv("HTTP_TIMEOUT")) != NULL) { 912 http_timeout = strtol(s, &end, 10); 913 if (*s == '\0' || *end != '\0' || http_timeout < 0) { 914 warnx("HTTP_TIMEOUT (%s) is not a positive integer", s); 915 http_timeout = 0; 916 } 917 } 918 919 /* signal handling */ 920 sa.sa_flags = 0; 921 sa.sa_handler = sig_handler; 922 sigemptyset(&sa.sa_mask); 923 sigaction(SIGALRM, &sa, NULL); 924 sa.sa_flags = SA_RESETHAND; 925 sigaction(SIGINT, &sa, NULL); 926 fetchRestartCalls = 0; 927 928 /* output file */ 929 if (o_flag) { 930 if (strcmp(o_filename, "-") == 0) { 931 o_stdout = 1; 932 } else if (stat(o_filename, &sb) == -1) { 933 if (errno == ENOENT) { 934 if (argc > 1) 935 errx(1, "%s is not a directory", 936 o_filename); 937 } else { 938 err(1, "%s", o_filename); 939 } 940 } else { 941 if (sb.st_mode & S_IFDIR) 942 o_directory = 1; 943 } 944 } 945 946 /* check if output is to a tty (for progress report) */ 947 v_tty = isatty(STDERR_FILENO); 948 if (v_tty) 949 pgrp = getpgrp(); 950 951 r = 0; 952 953 /* authentication */ 954 if (v_tty) 955 fetchAuthMethod = query_auth; 956 if (N_filename != NULL) { 957 if (setenv("NETRC", N_filename, 1) == -1) 958 err(1, "setenv: cannot set NETRC=%s", N_filename); 959 } 960 961 while (argc) { 962 if ((p = strrchr(*argv, '/')) == NULL) 963 p = *argv; 964 else 965 p++; 966 967 if (!*p) 968 p = "fetch.out"; 969 970 fetchLastErrCode = 0; 971 972 if (o_flag) { 973 if (o_stdout) { 974 e = fetch(*argv, "-"); 975 } else if (o_directory) { 976 asprintf(&q, "%s/%s", o_filename, p); 977 e = fetch(*argv, q); 978 free(q); 979 } else { 980 e = fetch(*argv, o_filename); 981 } 982 } else { 983 e = fetch(*argv, p); 984 } 985 986 if (sigint) 987 kill(getpid(), SIGINT); 988 989 if (e == 0 && once_flag) 990 exit(0); 991 992 if (e) { 993 r = 1; 994 if ((fetchLastErrCode 995 && fetchLastErrCode != FETCH_UNAVAIL 996 && fetchLastErrCode != FETCH_MOVED 997 && fetchLastErrCode != FETCH_URL 998 && fetchLastErrCode != FETCH_RESOLV 999 && fetchLastErrCode != FETCH_UNKNOWN)) { 1000 if (w_secs && v_level) 1001 fprintf(stderr, "Waiting %ld seconds " 1002 "before retrying\n", w_secs); 1003 if (w_secs) 1004 sleep(w_secs); 1005 if (a_flag) 1006 continue; 1007 } 1008 } 1009 1010 argc--, argv++; 1011 } 1012 1013 exit(r); 1014 } 1015