1 /*- 2 * Copyright (c) 2000-2011 Dag-Erling 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 (url->offset > sb.st_size) { 526 /* gap between what we asked for and what we got */ 527 warnx("%s: gap in resume mode", URL); 528 fclose(of); 529 of = NULL; 530 /* picked up again later */ 531 } else if (us.size != -1) { 532 if (us.size == sb.st_size) 533 /* nothing to do */ 534 goto success; 535 if (sb.st_size > us.size) { 536 /* local file too long! */ 537 warnx("%s: local file (%jd bytes) is longer " 538 "than remote file (%jd bytes)", path, 539 (intmax_t)sb.st_size, (intmax_t)us.size); 540 goto failure; 541 } 542 /* we got it, open local file */ 543 if ((of = fopen(path, "r+")) == NULL) { 544 warn("%s: fopen()", path); 545 goto failure; 546 } 547 /* check that it didn't move under our feet */ 548 if (fstat(fileno(of), &nsb) == -1) { 549 /* can't happen! */ 550 warn("%s: fstat()", path); 551 goto failure; 552 } 553 if (nsb.st_dev != sb.st_dev || 554 nsb.st_ino != nsb.st_ino || 555 nsb.st_size != sb.st_size) { 556 warnx("%s: file has changed", URL); 557 fclose(of); 558 of = NULL; 559 sb = nsb; 560 /* picked up again later */ 561 } 562 } 563 /* seek to where we left off */ 564 if (of != NULL && fseeko(of, url->offset, SEEK_SET) != 0) { 565 warn("%s: fseeko()", path); 566 fclose(of); 567 of = NULL; 568 /* picked up again later */ 569 } 570 } else if (m_flag && sb.st_size != -1) { 571 /* mirror mode, local file exists */ 572 if (sb.st_size == us.size && sb.st_mtime == us.mtime) 573 goto success; 574 } 575 576 if (of == NULL) { 577 /* 578 * We don't yet have an output file; either this is a 579 * vanilla run with no special flags, or the local and 580 * remote files didn't match. 581 */ 582 583 if (url->offset > 0) { 584 /* 585 * We tried to restart a transfer, but for 586 * some reason gave up - so we have to restart 587 * from scratch if we want the whole file 588 */ 589 url->offset = 0; 590 if ((f = fetchXGet(url, &us, flags)) == NULL) { 591 warnx("%s: %s", URL, fetchLastErrString); 592 goto failure; 593 } 594 if (sigint) 595 goto signal; 596 } 597 598 /* construct a temp file name */ 599 if (sb.st_size != -1 && S_ISREG(sb.st_mode)) { 600 if ((slash = strrchr(path, '/')) == NULL) 601 slash = path; 602 else 603 ++slash; 604 asprintf(&tmppath, "%.*s.fetch.XXXXXX.%s", 605 (int)(slash - path), path, slash); 606 if (tmppath != NULL) { 607 mkstemps(tmppath, strlen(slash) + 1); 608 of = fopen(tmppath, "w"); 609 chown(tmppath, sb.st_uid, sb.st_gid); 610 chmod(tmppath, sb.st_mode & ALLPERMS); 611 } 612 } 613 if (of == NULL) 614 of = fopen(path, "w"); 615 if (of == NULL) { 616 warn("%s: open()", path); 617 goto failure; 618 } 619 } 620 count = url->offset; 621 622 /* start the counter */ 623 stat_start(&xs, path, us.size, count); 624 625 sigalrm = siginfo = sigint = 0; 626 627 /* suck in the data */ 628 signal(SIGINFO, sig_handler); 629 while (!sigint) { 630 if (us.size != -1 && us.size - count < B_size && 631 us.size - count >= 0) 632 size = us.size - count; 633 else 634 size = B_size; 635 if (siginfo) { 636 stat_end(&xs); 637 siginfo = 0; 638 } 639 if ((size = fread(buf, 1, size, f)) == 0) { 640 if (ferror(f) && errno == EINTR && !sigint) 641 clearerr(f); 642 else 643 break; 644 } 645 stat_update(&xs, count += size); 646 for (ptr = buf; size > 0; ptr += wr, size -= wr) 647 if ((wr = fwrite(ptr, 1, size, of)) < size) { 648 if (ferror(of) && errno == EINTR && !sigint) 649 clearerr(of); 650 else 651 break; 652 } 653 if (size != 0) 654 break; 655 } 656 if (!sigalrm) 657 sigalrm = ferror(f) && errno == ETIMEDOUT; 658 signal(SIGINFO, SIG_DFL); 659 660 stat_end(&xs); 661 662 /* 663 * If the transfer timed out or was interrupted, we still want to 664 * set the mtime in case the file is not removed (-r or -R) and 665 * the user later restarts the transfer. 666 */ 667 signal: 668 /* set mtime of local file */ 669 if (!n_flag && us.mtime && !o_stdout && of != NULL && 670 (stat(path, &sb) != -1) && sb.st_mode & S_IFREG) { 671 struct timeval tv[2]; 672 673 fflush(of); 674 tv[0].tv_sec = (long)(us.atime ? us.atime : us.mtime); 675 tv[1].tv_sec = (long)us.mtime; 676 tv[0].tv_usec = tv[1].tv_usec = 0; 677 if (utimes(tmppath ? tmppath : path, tv)) 678 warn("%s: utimes()", tmppath ? tmppath : path); 679 } 680 681 /* timed out or interrupted? */ 682 if (sigalrm) 683 warnx("transfer timed out"); 684 if (sigint) { 685 warnx("transfer interrupted"); 686 goto failure; 687 } 688 689 /* timeout / interrupt before connection completley established? */ 690 if (f == NULL) 691 goto failure; 692 693 if (!sigalrm) { 694 /* check the status of our files */ 695 if (ferror(f)) 696 warn("%s", URL); 697 if (ferror(of)) 698 warn("%s", path); 699 if (ferror(f) || ferror(of)) 700 goto failure; 701 } 702 703 /* did the transfer complete normally? */ 704 if (us.size != -1 && count < us.size) { 705 warnx("%s appears to be truncated: %jd/%jd bytes", 706 path, (intmax_t)count, (intmax_t)us.size); 707 goto failure_keep; 708 } 709 710 /* 711 * If the transfer timed out and we didn't know how much to 712 * expect, assume the worst (i.e. we didn't get all of it) 713 */ 714 if (sigalrm && us.size == -1) { 715 warnx("%s may be truncated", path); 716 goto failure_keep; 717 } 718 719 success: 720 r = 0; 721 if (tmppath != NULL && rename(tmppath, path) == -1) { 722 warn("%s: rename()", path); 723 goto failure_keep; 724 } 725 goto done; 726 failure: 727 if (of && of != stdout && !R_flag && !r_flag) 728 if (stat(path, &sb) != -1 && (sb.st_mode & S_IFREG)) 729 unlink(tmppath ? tmppath : path); 730 if (R_flag && tmppath != NULL && sb.st_size == -1) 731 rename(tmppath, path); /* ignore errors here */ 732 failure_keep: 733 r = -1; 734 goto done; 735 done: 736 if (f) 737 fclose(f); 738 if (of && of != stdout) 739 fclose(of); 740 if (url) 741 fetchFreeURL(url); 742 if (tmppath != NULL) 743 free(tmppath); 744 return (r); 745 } 746 747 static void 748 usage(void) 749 { 750 fprintf(stderr, "%s\n%s\n%s\n%s\n", 751 "usage: fetch [-146AadFlMmnPpqRrsUv] [-B bytes] [-N file] [-o file] [-S bytes]", 752 " [-T seconds] [-w seconds] [-i file] URL ...", 753 " fetch [-146AadFlMmnPpqRrsUv] [-B bytes] [-N file] [-o file] [-S bytes]", 754 " [-T seconds] [-w seconds] [-i file] -h host -f file [-c dir]"); 755 } 756 757 758 /* 759 * Entry point 760 */ 761 int 762 main(int argc, char *argv[]) 763 { 764 struct stat sb; 765 struct sigaction sa; 766 const char *p, *s; 767 char *end, *q; 768 int c, e, r; 769 770 while ((c = getopt(argc, argv, 771 "146AaB:bc:dFf:Hh:i:lMmN:nPpo:qRrS:sT:tUvw:")) != -1) 772 switch (c) { 773 case '1': 774 once_flag = 1; 775 break; 776 case '4': 777 family = PF_INET; 778 break; 779 case '6': 780 family = PF_INET6; 781 break; 782 case 'A': 783 A_flag = 1; 784 break; 785 case 'a': 786 a_flag = 1; 787 break; 788 case 'B': 789 B_size = (off_t)strtol(optarg, &end, 10); 790 if (*optarg == '\0' || *end != '\0') 791 errx(1, "invalid buffer size (%s)", optarg); 792 break; 793 case 'b': 794 warnx("warning: the -b option is deprecated"); 795 b_flag = 1; 796 break; 797 case 'c': 798 c_dirname = optarg; 799 break; 800 case 'd': 801 d_flag = 1; 802 break; 803 case 'F': 804 F_flag = 1; 805 break; 806 case 'f': 807 f_filename = optarg; 808 break; 809 case 'H': 810 warnx("the -H option is now implicit, " 811 "use -U to disable"); 812 break; 813 case 'h': 814 h_hostname = optarg; 815 break; 816 case 'i': 817 i_flag = 1; 818 i_filename = optarg; 819 break; 820 case 'l': 821 l_flag = 1; 822 break; 823 case 'o': 824 o_flag = 1; 825 o_filename = optarg; 826 break; 827 case 'M': 828 case 'm': 829 if (r_flag) 830 errx(1, "the -m and -r flags " 831 "are mutually exclusive"); 832 m_flag = 1; 833 break; 834 case 'N': 835 N_filename = optarg; 836 break; 837 case 'n': 838 n_flag = 1; 839 break; 840 case 'P': 841 case 'p': 842 p_flag = 1; 843 break; 844 case 'q': 845 v_level = 0; 846 break; 847 case 'R': 848 R_flag = 1; 849 break; 850 case 'r': 851 if (m_flag) 852 errx(1, "the -m and -r flags " 853 "are mutually exclusive"); 854 r_flag = 1; 855 break; 856 case 'S': 857 S_size = (off_t)strtol(optarg, &end, 10); 858 if (*optarg == '\0' || *end != '\0') 859 errx(1, "invalid size (%s)", optarg); 860 break; 861 case 's': 862 s_flag = 1; 863 break; 864 case 'T': 865 T_secs = strtol(optarg, &end, 10); 866 if (*optarg == '\0' || *end != '\0') 867 errx(1, "invalid timeout (%s)", optarg); 868 break; 869 case 't': 870 t_flag = 1; 871 warnx("warning: the -t option is deprecated"); 872 break; 873 case 'U': 874 U_flag = 1; 875 break; 876 case 'v': 877 v_level++; 878 break; 879 case 'w': 880 a_flag = 1; 881 w_secs = strtol(optarg, &end, 10); 882 if (*optarg == '\0' || *end != '\0') 883 errx(1, "invalid delay (%s)", optarg); 884 break; 885 default: 886 usage(); 887 exit(1); 888 } 889 890 argc -= optind; 891 argv += optind; 892 893 if (h_hostname || f_filename || c_dirname) { 894 if (!h_hostname || !f_filename || argc) { 895 usage(); 896 exit(1); 897 } 898 /* XXX this is a hack. */ 899 if (strcspn(h_hostname, "@:/") != strlen(h_hostname)) 900 errx(1, "invalid hostname"); 901 if (asprintf(argv, "ftp://%s/%s/%s", h_hostname, 902 c_dirname ? c_dirname : "", f_filename) == -1) 903 errx(1, "%s", strerror(ENOMEM)); 904 argc++; 905 } 906 907 if (!argc) { 908 usage(); 909 exit(1); 910 } 911 912 /* allocate buffer */ 913 if (B_size < MINBUFSIZE) 914 B_size = MINBUFSIZE; 915 if ((buf = malloc(B_size)) == NULL) 916 errx(1, "%s", strerror(ENOMEM)); 917 918 /* timeouts */ 919 if ((s = getenv("FTP_TIMEOUT")) != NULL) { 920 ftp_timeout = strtol(s, &end, 10); 921 if (*s == '\0' || *end != '\0' || ftp_timeout < 0) { 922 warnx("FTP_TIMEOUT (%s) is not a positive integer", s); 923 ftp_timeout = 0; 924 } 925 } 926 if ((s = getenv("HTTP_TIMEOUT")) != NULL) { 927 http_timeout = strtol(s, &end, 10); 928 if (*s == '\0' || *end != '\0' || http_timeout < 0) { 929 warnx("HTTP_TIMEOUT (%s) is not a positive integer", s); 930 http_timeout = 0; 931 } 932 } 933 934 /* signal handling */ 935 sa.sa_flags = 0; 936 sa.sa_handler = sig_handler; 937 sigemptyset(&sa.sa_mask); 938 sigaction(SIGALRM, &sa, NULL); 939 sa.sa_flags = SA_RESETHAND; 940 sigaction(SIGINT, &sa, NULL); 941 fetchRestartCalls = 0; 942 943 /* output file */ 944 if (o_flag) { 945 if (strcmp(o_filename, "-") == 0) { 946 o_stdout = 1; 947 } else if (stat(o_filename, &sb) == -1) { 948 if (errno == ENOENT) { 949 if (argc > 1) 950 errx(1, "%s is not a directory", 951 o_filename); 952 } else { 953 err(1, "%s", o_filename); 954 } 955 } else { 956 if (sb.st_mode & S_IFDIR) 957 o_directory = 1; 958 } 959 } 960 961 /* check if output is to a tty (for progress report) */ 962 v_tty = isatty(STDERR_FILENO); 963 if (v_tty) 964 pgrp = getpgrp(); 965 966 r = 0; 967 968 /* authentication */ 969 if (v_tty) 970 fetchAuthMethod = query_auth; 971 if (N_filename != NULL) 972 setenv("NETRC", N_filename, 1); 973 974 while (argc) { 975 if ((p = strrchr(*argv, '/')) == NULL) 976 p = *argv; 977 else 978 p++; 979 980 if (!*p) 981 p = "fetch.out"; 982 983 fetchLastErrCode = 0; 984 985 if (o_flag) { 986 if (o_stdout) { 987 e = fetch(*argv, "-"); 988 } else if (o_directory) { 989 asprintf(&q, "%s/%s", o_filename, p); 990 e = fetch(*argv, q); 991 free(q); 992 } else { 993 e = fetch(*argv, o_filename); 994 } 995 } else { 996 e = fetch(*argv, p); 997 } 998 999 if (sigint) 1000 kill(getpid(), SIGINT); 1001 1002 if (e == 0 && once_flag) 1003 exit(0); 1004 1005 if (e) { 1006 r = 1; 1007 if ((fetchLastErrCode 1008 && fetchLastErrCode != FETCH_UNAVAIL 1009 && fetchLastErrCode != FETCH_MOVED 1010 && fetchLastErrCode != FETCH_URL 1011 && fetchLastErrCode != FETCH_RESOLV 1012 && fetchLastErrCode != FETCH_UNKNOWN)) { 1013 if (w_secs && v_level) 1014 fprintf(stderr, "Waiting %ld seconds " 1015 "before retrying\n", w_secs); 1016 if (w_secs) 1017 sleep(w_secs); 1018 if (a_flag) 1019 continue; 1020 } 1021 } 1022 1023 argc--, argv++; 1024 } 1025 1026 exit(r); 1027 } 1028