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 static int A_flag; /* -A: do not follow 302 redirects */ 55 static int a_flag; /* -a: auto retry */ 56 static off_t B_size; /* -B: buffer size */ 57 static int b_flag; /*! -b: workaround TCP bug */ 58 static char *c_dirname; /* -c: remote directory */ 59 static int d_flag; /* -d: direct connection */ 60 static int F_flag; /* -F: restart without checking mtime */ 61 static char *f_filename; /* -f: file to fetch */ 62 static char *h_hostname; /* -h: host to fetch from */ 63 static int i_flag; /* -i: specify file for mtime comparison */ 64 static char *i_filename; /* name of input file */ 65 static int l_flag; /* -l: link rather than copy file: URLs */ 66 static int m_flag; /* -[Mm]: mirror mode */ 67 static char *N_filename; /* -N: netrc file name */ 68 static int n_flag; /* -n: do not preserve modification time */ 69 static int o_flag; /* -o: specify output file */ 70 static int o_directory; /* output file is a directory */ 71 static char *o_filename; /* name of output file */ 72 static int o_stdout; /* output file is stdout */ 73 static int once_flag; /* -1: stop at first successful file */ 74 static int p_flag; /* -[Pp]: use passive FTP */ 75 static int R_flag; /* -R: don't delete partial files */ 76 static int r_flag; /* -r: restart previous transfer */ 77 static off_t S_size; /* -S: require size to match */ 78 static int s_flag; /* -s: show size, don't fetch */ 79 static long T_secs; /* -T: transfer timeout in seconds */ 80 static int t_flag; /*! -t: workaround TCP bug */ 81 static int U_flag; /* -U: do not use high ports */ 82 static int v_level = 1; /* -v: verbosity level */ 83 static int v_tty; /* stdout is a tty */ 84 static pid_t pgrp; /* our process group */ 85 static long w_secs; /* -w: retry delay */ 86 static int family = PF_UNSPEC; /* -[46]: address family to use */ 87 88 static int sigalrm; /* SIGALRM received */ 89 static int siginfo; /* SIGINFO received */ 90 static int sigint; /* SIGINT received */ 91 92 static long ftp_timeout = TIMEOUT; /* default timeout for FTP transfers */ 93 static long http_timeout = TIMEOUT;/* default timeout for HTTP transfers */ 94 static 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; /* start of transfer */ 119 struct timeval last; /* time of last update */ 120 struct timeval last2; /* time of previous last update */ 121 off_t size; /* size of file per HTTP hdr */ 122 off_t offset; /* starting offset in file */ 123 off_t rcvd; /* bytes already received */ 124 off_t lastrcvd; /* bytes received since last update */ 125 }; 126 127 /* 128 * Compute and display ETA 129 */ 130 static const char * 131 stat_eta(struct xferstat *xs) 132 { 133 static char str[16]; 134 long elapsed, eta; 135 off_t received, expected; 136 137 elapsed = xs->last.tv_sec - xs->start.tv_sec; 138 received = xs->rcvd - xs->offset; 139 expected = xs->size - xs->rcvd; 140 eta = (long)((double)elapsed * expected / received); 141 if (eta > 3600) 142 snprintf(str, sizeof str, "%02ldh%02ldm", 143 eta / 3600, (eta % 3600) / 60); 144 else if (eta > 0) 145 snprintf(str, sizeof str, "%02ldm%02lds", 146 eta / 60, eta % 60); 147 else 148 snprintf(str, sizeof str, "%02ldm%02lds", 149 elapsed / 60, elapsed % 60); 150 return (str); 151 } 152 153 /* 154 * Format a number as "xxxx YB" where Y is ' ', 'k', 'M'... 155 */ 156 static const char *prefixes = " kMGTP"; 157 static const char * 158 stat_bytes(off_t bytes) 159 { 160 static char str[16]; 161 const char *prefix = prefixes; 162 163 while (bytes > 9999 && prefix[1] != '\0') { 164 bytes /= 1024; 165 prefix++; 166 } 167 snprintf(str, sizeof str, "%4jd %cB", (intmax_t)bytes, *prefix); 168 return (str); 169 } 170 171 /* 172 * Compute and display transfer rate 173 */ 174 static const char * 175 stat_bps(struct xferstat *xs) 176 { 177 static char str[16]; 178 double delta, bps; 179 180 delta = (xs->last.tv_sec + (xs->last.tv_usec / 1.e6)) 181 - (xs->last2.tv_sec + (xs->last2.tv_usec / 1.e6)); 182 183 if (delta == 0.0) { 184 snprintf(str, sizeof str, "?? Bps"); 185 } else { 186 bps = (xs->rcvd - xs->lastrcvd) / delta; 187 snprintf(str, sizeof str, "%sps", stat_bytes((off_t)bps)); 188 } 189 return (str); 190 } 191 192 /* 193 * Update the stats display 194 */ 195 static void 196 stat_display(struct xferstat *xs, int force) 197 { 198 struct timeval now; 199 int ctty_pgrp; 200 201 /* check if we're the foreground process */ 202 if (ioctl(STDERR_FILENO, TIOCGPGRP, &ctty_pgrp) == -1 || 203 (pid_t)ctty_pgrp != pgrp) 204 return; 205 206 gettimeofday(&now, NULL); 207 if (!force && now.tv_sec <= xs->last.tv_sec) 208 return; 209 xs->last2 = xs->last; 210 xs->last = now; 211 212 fprintf(stderr, "\r%-46.46s", xs->name); 213 if (xs->size <= 0) { 214 setproctitle("%s [%s]", xs->name, stat_bytes(xs->rcvd)); 215 fprintf(stderr, " %s", stat_bytes(xs->rcvd)); 216 } else { 217 setproctitle("%s [%d%% of %s]", xs->name, 218 (int)((100.0 * xs->rcvd) / xs->size), 219 stat_bytes(xs->size)); 220 fprintf(stderr, "%3d%% of %s", 221 (int)((100.0 * xs->rcvd) / xs->size), 222 stat_bytes(xs->size)); 223 } 224 if (force == 2) { 225 xs->lastrcvd = xs->offset; 226 xs->last2 = xs->start; 227 } 228 fprintf(stderr, " %s", stat_bps(xs)); 229 if ((xs->size > 0 && xs->rcvd > 0 && 230 xs->last.tv_sec >= xs->start.tv_sec + 3) || 231 force == 2) 232 fprintf(stderr, " %s", stat_eta(xs)); 233 xs->lastrcvd = xs->rcvd; 234 } 235 236 /* 237 * Initialize the transfer statistics 238 */ 239 static void 240 stat_start(struct xferstat *xs, const char *name, off_t size, off_t offset) 241 { 242 snprintf(xs->name, sizeof xs->name, "%s", name); 243 gettimeofday(&xs->start, NULL); 244 xs->last.tv_sec = xs->last.tv_usec = 0; 245 xs->size = size; 246 xs->offset = offset; 247 xs->rcvd = offset; 248 xs->lastrcvd = offset; 249 if (v_tty && v_level > 0) 250 stat_display(xs, 1); 251 else if (v_level > 0) 252 fprintf(stderr, "%-46s", xs->name); 253 } 254 255 /* 256 * Update the transfer statistics 257 */ 258 static void 259 stat_update(struct xferstat *xs, off_t rcvd) 260 { 261 xs->rcvd = rcvd; 262 if (v_tty && v_level > 0) 263 stat_display(xs, 0); 264 } 265 266 /* 267 * Finalize the transfer statistics 268 */ 269 static void 270 stat_end(struct xferstat *xs) 271 { 272 gettimeofday(&xs->last, NULL); 273 if (v_tty && v_level > 0) { 274 stat_display(xs, 2); 275 putc('\n', stderr); 276 } else if (v_level > 0) { 277 fprintf(stderr, " %s %s\n", 278 stat_bytes(xs->size), stat_bps(xs)); 279 } 280 } 281 282 /* 283 * Ask the user for authentication details 284 */ 285 static int 286 query_auth(struct url *URL) 287 { 288 struct termios tios; 289 tcflag_t saved_flags; 290 int i, nopwd; 291 292 fprintf(stderr, "Authentication required for <%s://%s:%d/>!\n", 293 URL->scheme, URL->host, URL->port); 294 295 fprintf(stderr, "Login: "); 296 if (fgets(URL->user, sizeof URL->user, stdin) == NULL) 297 return (-1); 298 for (i = strlen(URL->user); i >= 0; --i) 299 if (URL->user[i] == '\r' || URL->user[i] == '\n') 300 URL->user[i] = '\0'; 301 302 fprintf(stderr, "Password: "); 303 if (tcgetattr(STDIN_FILENO, &tios) == 0) { 304 saved_flags = tios.c_lflag; 305 tios.c_lflag &= ~ECHO; 306 tios.c_lflag |= ECHONL|ICANON; 307 tcsetattr(STDIN_FILENO, TCSAFLUSH|TCSASOFT, &tios); 308 nopwd = (fgets(URL->pwd, sizeof URL->pwd, stdin) == NULL); 309 tios.c_lflag = saved_flags; 310 tcsetattr(STDIN_FILENO, TCSANOW|TCSASOFT, &tios); 311 } else { 312 nopwd = (fgets(URL->pwd, sizeof URL->pwd, stdin) == NULL); 313 } 314 if (nopwd) 315 return (-1); 316 for (i = strlen(URL->pwd); i >= 0; --i) 317 if (URL->pwd[i] == '\r' || URL->pwd[i] == '\n') 318 URL->pwd[i] = '\0'; 319 320 return (0); 321 } 322 323 /* 324 * Fetch a file 325 */ 326 static int 327 fetch(char *URL, const char *path) 328 { 329 struct url *url; 330 struct url_stat us; 331 struct stat sb, nsb; 332 struct xferstat xs; 333 FILE *f, *of; 334 size_t size, readcnt, wr; 335 off_t count; 336 char flags[8]; 337 const char *slash; 338 char *tmppath; 339 int r; 340 unsigned timeout; 341 char *ptr; 342 343 f = of = NULL; 344 tmppath = NULL; 345 346 timeout = 0; 347 *flags = 0; 348 count = 0; 349 350 /* set verbosity level */ 351 if (v_level > 1) 352 strcat(flags, "v"); 353 if (v_level > 2) 354 fetchDebug = 1; 355 356 /* parse URL */ 357 url = NULL; 358 if (*URL == '\0') { 359 warnx("empty URL"); 360 goto failure; 361 } 362 if ((url = fetchParseURL(URL)) == NULL) { 363 warnx("%s: parse error", URL); 364 goto failure; 365 } 366 367 /* if no scheme was specified, take a guess */ 368 if (!*url->scheme) { 369 if (!*url->host) 370 strcpy(url->scheme, SCHEME_FILE); 371 else if (strncasecmp(url->host, "ftp.", 4) == 0) 372 strcpy(url->scheme, SCHEME_FTP); 373 else if (strncasecmp(url->host, "www.", 4) == 0) 374 strcpy(url->scheme, SCHEME_HTTP); 375 } 376 377 /* common flags */ 378 switch (family) { 379 case PF_INET: 380 strcat(flags, "4"); 381 break; 382 case PF_INET6: 383 strcat(flags, "6"); 384 break; 385 } 386 387 /* FTP specific flags */ 388 if (strcmp(url->scheme, SCHEME_FTP) == 0) { 389 if (p_flag) 390 strcat(flags, "p"); 391 if (d_flag) 392 strcat(flags, "d"); 393 if (U_flag) 394 strcat(flags, "l"); 395 timeout = T_secs ? T_secs : ftp_timeout; 396 } 397 398 /* HTTP specific flags */ 399 if (strcmp(url->scheme, SCHEME_HTTP) == 0 || 400 strcmp(url->scheme, SCHEME_HTTPS) == 0) { 401 if (d_flag) 402 strcat(flags, "d"); 403 if (A_flag) 404 strcat(flags, "A"); 405 timeout = T_secs ? T_secs : http_timeout; 406 if (i_flag) { 407 if (stat(i_filename, &sb)) { 408 warn("%s: stat()", i_filename); 409 goto failure; 410 } 411 url->ims_time = sb.st_mtime; 412 strcat(flags, "i"); 413 } 414 } 415 416 /* set the protocol timeout. */ 417 fetchTimeout = timeout; 418 419 /* just print size */ 420 if (s_flag) { 421 if (timeout) 422 alarm(timeout); 423 r = fetchStat(url, &us, flags); 424 if (timeout) 425 alarm(0); 426 if (sigalrm || sigint) 427 goto signal; 428 if (r == -1) { 429 warnx("%s", fetchLastErrString); 430 goto failure; 431 } 432 if (us.size == -1) 433 printf("Unknown\n"); 434 else 435 printf("%jd\n", (intmax_t)us.size); 436 goto success; 437 } 438 439 /* 440 * If the -r flag was specified, we have to compare the local 441 * and remote files, so we should really do a fetchStat() 442 * first, but I know of at least one HTTP server that only 443 * sends the content size in response to GET requests, and 444 * leaves it out of replies to HEAD requests. Also, in the 445 * (frequent) case that the local and remote files match but 446 * the local file is truncated, we have sufficient information 447 * before the compare to issue a correct request. Therefore, 448 * we always issue a GET request as if we were sure the local 449 * file was a truncated copy of the remote file; we can drop 450 * the connection later if we change our minds. 451 */ 452 sb.st_size = -1; 453 if (!o_stdout) { 454 r = stat(path, &sb); 455 if (r == 0 && r_flag && S_ISREG(sb.st_mode)) { 456 url->offset = sb.st_size; 457 } else if (r == -1 || !S_ISREG(sb.st_mode)) { 458 /* 459 * Whatever value sb.st_size has now is either 460 * wrong (if stat(2) failed) or irrelevant (if the 461 * path does not refer to a regular file) 462 */ 463 sb.st_size = -1; 464 } 465 if (r == -1 && errno != ENOENT) { 466 warnx("%s: stat()", path); 467 goto failure; 468 } 469 } 470 471 /* start the transfer */ 472 if (timeout) 473 alarm(timeout); 474 f = fetchXGet(url, &us, flags); 475 if (timeout) 476 alarm(0); 477 if (sigalrm || sigint) 478 goto signal; 479 if (f == NULL) { 480 warnx("%s: %s", URL, fetchLastErrString); 481 if (i_flag && strcmp(url->scheme, SCHEME_HTTP) == 0 482 && fetchLastErrCode == FETCH_OK 483 && strcmp(fetchLastErrString, "Not Modified") == 0) { 484 /* HTTP Not Modified Response, return OK. */ 485 r = 0; 486 goto done; 487 } else 488 goto failure; 489 } 490 if (sigint) 491 goto signal; 492 493 /* check that size is as expected */ 494 if (S_size) { 495 if (us.size == -1) { 496 warnx("%s: size unknown", URL); 497 } else if (us.size != S_size) { 498 warnx("%s: size mismatch: expected %jd, actual %jd", 499 URL, (intmax_t)S_size, (intmax_t)us.size); 500 goto failure; 501 } 502 } 503 504 /* symlink instead of copy */ 505 if (l_flag && strcmp(url->scheme, "file") == 0 && !o_stdout) { 506 if (symlink(url->doc, path) == -1) { 507 warn("%s: symlink()", path); 508 goto failure; 509 } 510 goto success; 511 } 512 513 if (us.size == -1 && !o_stdout && v_level > 0) 514 warnx("%s: size of remote file is not known", URL); 515 if (v_level > 1) { 516 if (sb.st_size != -1) 517 fprintf(stderr, "local size / mtime: %jd / %ld\n", 518 (intmax_t)sb.st_size, (long)sb.st_mtime); 519 if (us.size != -1) 520 fprintf(stderr, "remote size / mtime: %jd / %ld\n", 521 (intmax_t)us.size, (long)us.mtime); 522 } 523 524 /* open output file */ 525 if (o_stdout) { 526 /* output to stdout */ 527 of = stdout; 528 } else if (r_flag && sb.st_size != -1) { 529 /* resume mode, local file exists */ 530 if (!F_flag && us.mtime && sb.st_mtime != us.mtime) { 531 /* no match! have to refetch */ 532 fclose(f); 533 /* if precious, warn the user and give up */ 534 if (R_flag) { 535 warnx("%s: local modification time " 536 "does not match remote", path); 537 goto failure_keep; 538 } 539 } else if (url->offset > sb.st_size) { 540 /* gap between what we asked for and what we got */ 541 warnx("%s: gap in resume mode", URL); 542 fclose(of); 543 of = NULL; 544 /* picked up again later */ 545 } else if (us.size != -1) { 546 if (us.size == sb.st_size) 547 /* nothing to do */ 548 goto success; 549 if (sb.st_size > us.size) { 550 /* local file too long! */ 551 warnx("%s: local file (%jd bytes) is longer " 552 "than remote file (%jd bytes)", path, 553 (intmax_t)sb.st_size, (intmax_t)us.size); 554 goto failure; 555 } 556 /* we got it, open local file */ 557 if ((of = fopen(path, "r+")) == NULL) { 558 warn("%s: fopen()", path); 559 goto failure; 560 } 561 /* check that it didn't move under our feet */ 562 if (fstat(fileno(of), &nsb) == -1) { 563 /* can't happen! */ 564 warn("%s: fstat()", path); 565 goto failure; 566 } 567 if (nsb.st_dev != sb.st_dev || 568 nsb.st_ino != nsb.st_ino || 569 nsb.st_size != sb.st_size) { 570 warnx("%s: file has changed", URL); 571 fclose(of); 572 of = NULL; 573 sb = nsb; 574 /* picked up again later */ 575 } 576 } 577 /* seek to where we left off */ 578 if (of != NULL && fseeko(of, url->offset, SEEK_SET) != 0) { 579 warn("%s: fseeko()", path); 580 fclose(of); 581 of = NULL; 582 /* picked up again later */ 583 } 584 } else if (m_flag && sb.st_size != -1) { 585 /* mirror mode, local file exists */ 586 if (sb.st_size == us.size && sb.st_mtime == us.mtime) 587 goto success; 588 } 589 590 if (of == NULL) { 591 /* 592 * We don't yet have an output file; either this is a 593 * vanilla run with no special flags, or the local and 594 * remote files didn't match. 595 */ 596 597 if (url->offset > 0) { 598 /* 599 * We tried to restart a transfer, but for 600 * some reason gave up - so we have to restart 601 * from scratch if we want the whole file 602 */ 603 url->offset = 0; 604 if ((f = fetchXGet(url, &us, flags)) == NULL) { 605 warnx("%s: %s", URL, fetchLastErrString); 606 goto failure; 607 } 608 if (sigint) 609 goto signal; 610 } 611 612 /* construct a temp file name */ 613 if (sb.st_size != -1 && S_ISREG(sb.st_mode)) { 614 if ((slash = strrchr(path, '/')) == NULL) 615 slash = path; 616 else 617 ++slash; 618 asprintf(&tmppath, "%.*s.fetch.XXXXXX.%s", 619 (int)(slash - path), path, slash); 620 if (tmppath != NULL) { 621 if (mkstemps(tmppath, strlen(slash) + 1) == -1) { 622 warn("%s: mkstemps()", path); 623 goto failure; 624 } 625 of = fopen(tmppath, "w"); 626 chown(tmppath, sb.st_uid, sb.st_gid); 627 chmod(tmppath, sb.st_mode & ALLPERMS); 628 } 629 } 630 if (of == NULL) 631 of = fopen(path, "w"); 632 if (of == NULL) { 633 warn("%s: open()", path); 634 goto failure; 635 } 636 } 637 count = url->offset; 638 639 /* start the counter */ 640 stat_start(&xs, path, us.size, count); 641 642 sigalrm = siginfo = sigint = 0; 643 644 /* suck in the data */ 645 signal(SIGINFO, sig_handler); 646 while (!sigint) { 647 if (us.size != -1 && us.size - count < B_size && 648 us.size - count >= 0) 649 size = us.size - count; 650 else 651 size = B_size; 652 if (siginfo) { 653 stat_end(&xs); 654 siginfo = 0; 655 } 656 657 if (size == 0) 658 break; 659 660 if ((readcnt = fread(buf, 1, size, f)) < size) { 661 if (ferror(f) && errno == EINTR && !sigint) 662 clearerr(f); 663 else if (readcnt == 0) 664 break; 665 } 666 667 stat_update(&xs, count += readcnt); 668 for (ptr = buf; readcnt > 0; ptr += wr, readcnt -= wr) 669 if ((wr = fwrite(ptr, 1, readcnt, of)) < readcnt) { 670 if (ferror(of) && errno == EINTR && !sigint) 671 clearerr(of); 672 else 673 break; 674 } 675 if (readcnt != 0) 676 break; 677 } 678 if (!sigalrm) 679 sigalrm = ferror(f) && errno == ETIMEDOUT; 680 signal(SIGINFO, SIG_DFL); 681 682 stat_end(&xs); 683 684 /* 685 * If the transfer timed out or was interrupted, we still want to 686 * set the mtime in case the file is not removed (-r or -R) and 687 * the user later restarts the transfer. 688 */ 689 signal: 690 /* set mtime of local file */ 691 if (!n_flag && us.mtime && !o_stdout && of != NULL && 692 (stat(path, &sb) != -1) && sb.st_mode & S_IFREG) { 693 struct timeval tv[2]; 694 695 fflush(of); 696 tv[0].tv_sec = (long)(us.atime ? us.atime : us.mtime); 697 tv[1].tv_sec = (long)us.mtime; 698 tv[0].tv_usec = tv[1].tv_usec = 0; 699 if (utimes(tmppath ? tmppath : path, tv)) 700 warn("%s: utimes()", tmppath ? tmppath : path); 701 } 702 703 /* timed out or interrupted? */ 704 if (sigalrm) 705 warnx("transfer timed out"); 706 if (sigint) { 707 warnx("transfer interrupted"); 708 goto failure; 709 } 710 711 /* timeout / interrupt before connection completley established? */ 712 if (f == NULL) 713 goto failure; 714 715 if (!sigalrm) { 716 /* check the status of our files */ 717 if (ferror(f)) 718 warn("%s", URL); 719 if (ferror(of)) 720 warn("%s", path); 721 if (ferror(f) || ferror(of)) 722 goto failure; 723 } 724 725 /* did the transfer complete normally? */ 726 if (us.size != -1 && count < us.size) { 727 warnx("%s appears to be truncated: %jd/%jd bytes", 728 path, (intmax_t)count, (intmax_t)us.size); 729 goto failure_keep; 730 } 731 732 /* 733 * If the transfer timed out and we didn't know how much to 734 * expect, assume the worst (i.e. we didn't get all of it) 735 */ 736 if (sigalrm && us.size == -1) { 737 warnx("%s may be truncated", path); 738 goto failure_keep; 739 } 740 741 success: 742 r = 0; 743 if (tmppath != NULL && rename(tmppath, path) == -1) { 744 warn("%s: rename()", path); 745 goto failure_keep; 746 } 747 goto done; 748 failure: 749 if (of && of != stdout && !R_flag && !r_flag) 750 if (stat(path, &sb) != -1 && (sb.st_mode & S_IFREG)) 751 unlink(tmppath ? tmppath : path); 752 if (R_flag && tmppath != NULL && sb.st_size == -1) 753 rename(tmppath, path); /* ignore errors here */ 754 failure_keep: 755 r = -1; 756 goto done; 757 done: 758 if (f) 759 fclose(f); 760 if (of && of != stdout) 761 fclose(of); 762 if (url) 763 fetchFreeURL(url); 764 if (tmppath != NULL) 765 free(tmppath); 766 return (r); 767 } 768 769 static void 770 usage(void) 771 { 772 fprintf(stderr, "%s\n%s\n%s\n%s\n", 773 "usage: fetch [-146AadFlMmnPpqRrsUv] [-B bytes] [-N file] [-o file] [-S bytes]", 774 " [-T seconds] [-w seconds] [-i file] URL ...", 775 " fetch [-146AadFlMmnPpqRrsUv] [-B bytes] [-N file] [-o file] [-S bytes]", 776 " [-T seconds] [-w seconds] [-i file] -h host -f file [-c dir]"); 777 } 778 779 780 /* 781 * Entry point 782 */ 783 int 784 main(int argc, char *argv[]) 785 { 786 struct stat sb; 787 struct sigaction sa; 788 const char *p, *s; 789 char *end, *q; 790 int c, e, r; 791 792 while ((c = getopt(argc, argv, 793 "146AaB:bc:dFf:Hh:i:lMmN:nPpo:qRrS:sT:tUvw:")) != -1) 794 switch (c) { 795 case '1': 796 once_flag = 1; 797 break; 798 case '4': 799 family = PF_INET; 800 break; 801 case '6': 802 family = PF_INET6; 803 break; 804 case 'A': 805 A_flag = 1; 806 break; 807 case 'a': 808 a_flag = 1; 809 break; 810 case 'B': 811 B_size = (off_t)strtol(optarg, &end, 10); 812 if (*optarg == '\0' || *end != '\0') 813 errx(1, "invalid buffer size (%s)", optarg); 814 break; 815 case 'b': 816 warnx("warning: the -b option is deprecated"); 817 b_flag = 1; 818 break; 819 case 'c': 820 c_dirname = optarg; 821 break; 822 case 'd': 823 d_flag = 1; 824 break; 825 case 'F': 826 F_flag = 1; 827 break; 828 case 'f': 829 f_filename = optarg; 830 break; 831 case 'H': 832 warnx("the -H option is now implicit, " 833 "use -U to disable"); 834 break; 835 case 'h': 836 h_hostname = optarg; 837 break; 838 case 'i': 839 i_flag = 1; 840 i_filename = optarg; 841 break; 842 case 'l': 843 l_flag = 1; 844 break; 845 case 'o': 846 o_flag = 1; 847 o_filename = optarg; 848 break; 849 case 'M': 850 case 'm': 851 if (r_flag) 852 errx(1, "the -m and -r flags " 853 "are mutually exclusive"); 854 m_flag = 1; 855 break; 856 case 'N': 857 N_filename = optarg; 858 break; 859 case 'n': 860 n_flag = 1; 861 break; 862 case 'P': 863 case 'p': 864 p_flag = 1; 865 break; 866 case 'q': 867 v_level = 0; 868 break; 869 case 'R': 870 R_flag = 1; 871 break; 872 case 'r': 873 if (m_flag) 874 errx(1, "the -m and -r flags " 875 "are mutually exclusive"); 876 r_flag = 1; 877 break; 878 case 'S': 879 S_size = (off_t)strtol(optarg, &end, 10); 880 if (*optarg == '\0' || *end != '\0') 881 errx(1, "invalid size (%s)", optarg); 882 break; 883 case 's': 884 s_flag = 1; 885 break; 886 case 'T': 887 T_secs = strtol(optarg, &end, 10); 888 if (*optarg == '\0' || *end != '\0') 889 errx(1, "invalid timeout (%s)", optarg); 890 break; 891 case 't': 892 t_flag = 1; 893 warnx("warning: the -t option is deprecated"); 894 break; 895 case 'U': 896 U_flag = 1; 897 break; 898 case 'v': 899 v_level++; 900 break; 901 case 'w': 902 a_flag = 1; 903 w_secs = strtol(optarg, &end, 10); 904 if (*optarg == '\0' || *end != '\0') 905 errx(1, "invalid delay (%s)", optarg); 906 break; 907 default: 908 usage(); 909 exit(1); 910 } 911 912 argc -= optind; 913 argv += optind; 914 915 if (h_hostname || f_filename || c_dirname) { 916 if (!h_hostname || !f_filename || argc) { 917 usage(); 918 exit(1); 919 } 920 /* XXX this is a hack. */ 921 if (strcspn(h_hostname, "@:/") != strlen(h_hostname)) 922 errx(1, "invalid hostname"); 923 if (asprintf(argv, "ftp://%s/%s/%s", h_hostname, 924 c_dirname ? c_dirname : "", f_filename) == -1) 925 errx(1, "%s", strerror(ENOMEM)); 926 argc++; 927 } 928 929 if (!argc) { 930 usage(); 931 exit(1); 932 } 933 934 /* allocate buffer */ 935 if (B_size < MINBUFSIZE) 936 B_size = MINBUFSIZE; 937 if ((buf = malloc(B_size)) == NULL) 938 errx(1, "%s", strerror(ENOMEM)); 939 940 /* timeouts */ 941 if ((s = getenv("FTP_TIMEOUT")) != NULL) { 942 ftp_timeout = strtol(s, &end, 10); 943 if (*s == '\0' || *end != '\0' || ftp_timeout < 0) { 944 warnx("FTP_TIMEOUT (%s) is not a positive integer", s); 945 ftp_timeout = 0; 946 } 947 } 948 if ((s = getenv("HTTP_TIMEOUT")) != NULL) { 949 http_timeout = strtol(s, &end, 10); 950 if (*s == '\0' || *end != '\0' || http_timeout < 0) { 951 warnx("HTTP_TIMEOUT (%s) is not a positive integer", s); 952 http_timeout = 0; 953 } 954 } 955 956 /* signal handling */ 957 sa.sa_flags = 0; 958 sa.sa_handler = sig_handler; 959 sigemptyset(&sa.sa_mask); 960 sigaction(SIGALRM, &sa, NULL); 961 sa.sa_flags = SA_RESETHAND; 962 sigaction(SIGINT, &sa, NULL); 963 fetchRestartCalls = 0; 964 965 /* output file */ 966 if (o_flag) { 967 if (strcmp(o_filename, "-") == 0) { 968 o_stdout = 1; 969 } else if (stat(o_filename, &sb) == -1) { 970 if (errno == ENOENT) { 971 if (argc > 1) 972 errx(1, "%s is not a directory", 973 o_filename); 974 } else { 975 err(1, "%s", o_filename); 976 } 977 } else { 978 if (sb.st_mode & S_IFDIR) 979 o_directory = 1; 980 } 981 } 982 983 /* check if output is to a tty (for progress report) */ 984 v_tty = isatty(STDERR_FILENO); 985 if (v_tty) 986 pgrp = getpgrp(); 987 988 r = 0; 989 990 /* authentication */ 991 if (v_tty) 992 fetchAuthMethod = query_auth; 993 if (N_filename != NULL) 994 if (setenv("NETRC", N_filename, 1) == -1) 995 err(1, "setenv: cannot set NETRC=%s", N_filename); 996 997 while (argc) { 998 if ((p = strrchr(*argv, '/')) == NULL) 999 p = *argv; 1000 else 1001 p++; 1002 1003 if (!*p) 1004 p = "fetch.out"; 1005 1006 fetchLastErrCode = 0; 1007 1008 if (o_flag) { 1009 if (o_stdout) { 1010 e = fetch(*argv, "-"); 1011 } else if (o_directory) { 1012 asprintf(&q, "%s/%s", o_filename, p); 1013 e = fetch(*argv, q); 1014 free(q); 1015 } else { 1016 e = fetch(*argv, o_filename); 1017 } 1018 } else { 1019 e = fetch(*argv, p); 1020 } 1021 1022 if (sigint) 1023 kill(getpid(), SIGINT); 1024 1025 if (e == 0 && once_flag) 1026 exit(0); 1027 1028 if (e) { 1029 r = 1; 1030 if ((fetchLastErrCode 1031 && fetchLastErrCode != FETCH_UNAVAIL 1032 && fetchLastErrCode != FETCH_MOVED 1033 && fetchLastErrCode != FETCH_URL 1034 && fetchLastErrCode != FETCH_RESOLV 1035 && fetchLastErrCode != FETCH_UNKNOWN)) { 1036 if (w_secs && v_level) 1037 fprintf(stderr, "Waiting %ld seconds " 1038 "before retrying\n", w_secs); 1039 if (w_secs) 1040 sleep(w_secs); 1041 if (a_flag) 1042 continue; 1043 } 1044 } 1045 1046 argc--, argv++; 1047 } 1048 1049 exit(r); 1050 } 1051