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 - xs->offset) / 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 mkstemps(tmppath, strlen(slash) + 1); 622 of = fopen(tmppath, "w"); 623 chown(tmppath, sb.st_uid, sb.st_gid); 624 chmod(tmppath, sb.st_mode & ALLPERMS); 625 } 626 } 627 if (of == NULL) 628 of = fopen(path, "w"); 629 if (of == NULL) { 630 warn("%s: open()", path); 631 goto failure; 632 } 633 } 634 count = url->offset; 635 636 /* start the counter */ 637 stat_start(&xs, path, us.size, count); 638 639 sigalrm = siginfo = sigint = 0; 640 641 /* suck in the data */ 642 signal(SIGINFO, sig_handler); 643 while (!sigint) { 644 if (us.size != -1 && us.size - count < B_size && 645 us.size - count >= 0) 646 size = us.size - count; 647 else 648 size = B_size; 649 if (siginfo) { 650 stat_end(&xs); 651 siginfo = 0; 652 } 653 654 if (size == 0) 655 break; 656 657 if ((readcnt = fread(buf, 1, size, f)) < size) { 658 if (ferror(f) && errno == EINTR && !sigint) 659 clearerr(f); 660 else if (readcnt == 0) 661 break; 662 } 663 664 stat_update(&xs, count += readcnt); 665 for (ptr = buf; readcnt > 0; ptr += wr, readcnt -= wr) 666 if ((wr = fwrite(ptr, 1, readcnt, of)) < readcnt) { 667 if (ferror(of) && errno == EINTR && !sigint) 668 clearerr(of); 669 else 670 break; 671 } 672 if (readcnt != 0) 673 break; 674 } 675 if (!sigalrm) 676 sigalrm = ferror(f) && errno == ETIMEDOUT; 677 signal(SIGINFO, SIG_DFL); 678 679 stat_end(&xs); 680 681 /* 682 * If the transfer timed out or was interrupted, we still want to 683 * set the mtime in case the file is not removed (-r or -R) and 684 * the user later restarts the transfer. 685 */ 686 signal: 687 /* set mtime of local file */ 688 if (!n_flag && us.mtime && !o_stdout && of != NULL && 689 (stat(path, &sb) != -1) && sb.st_mode & S_IFREG) { 690 struct timeval tv[2]; 691 692 fflush(of); 693 tv[0].tv_sec = (long)(us.atime ? us.atime : us.mtime); 694 tv[1].tv_sec = (long)us.mtime; 695 tv[0].tv_usec = tv[1].tv_usec = 0; 696 if (utimes(tmppath ? tmppath : path, tv)) 697 warn("%s: utimes()", tmppath ? tmppath : path); 698 } 699 700 /* timed out or interrupted? */ 701 if (sigalrm) 702 warnx("transfer timed out"); 703 if (sigint) { 704 warnx("transfer interrupted"); 705 goto failure; 706 } 707 708 /* timeout / interrupt before connection completley established? */ 709 if (f == NULL) 710 goto failure; 711 712 if (!sigalrm) { 713 /* check the status of our files */ 714 if (ferror(f)) 715 warn("%s", URL); 716 if (ferror(of)) 717 warn("%s", path); 718 if (ferror(f) || ferror(of)) 719 goto failure; 720 } 721 722 /* did the transfer complete normally? */ 723 if (us.size != -1 && count < us.size) { 724 warnx("%s appears to be truncated: %jd/%jd bytes", 725 path, (intmax_t)count, (intmax_t)us.size); 726 goto failure_keep; 727 } 728 729 /* 730 * If the transfer timed out and we didn't know how much to 731 * expect, assume the worst (i.e. we didn't get all of it) 732 */ 733 if (sigalrm && us.size == -1) { 734 warnx("%s may be truncated", path); 735 goto failure_keep; 736 } 737 738 success: 739 r = 0; 740 if (tmppath != NULL && rename(tmppath, path) == -1) { 741 warn("%s: rename()", path); 742 goto failure_keep; 743 } 744 goto done; 745 failure: 746 if (of && of != stdout && !R_flag && !r_flag) 747 if (stat(path, &sb) != -1 && (sb.st_mode & S_IFREG)) 748 unlink(tmppath ? tmppath : path); 749 if (R_flag && tmppath != NULL && sb.st_size == -1) 750 rename(tmppath, path); /* ignore errors here */ 751 failure_keep: 752 r = -1; 753 goto done; 754 done: 755 if (f) 756 fclose(f); 757 if (of && of != stdout) 758 fclose(of); 759 if (url) 760 fetchFreeURL(url); 761 if (tmppath != NULL) 762 free(tmppath); 763 return (r); 764 } 765 766 static void 767 usage(void) 768 { 769 fprintf(stderr, "%s\n%s\n%s\n%s\n", 770 "usage: fetch [-146AadFlMmnPpqRrsUv] [-B bytes] [-N file] [-o file] [-S bytes]", 771 " [-T seconds] [-w seconds] [-i file] URL ...", 772 " fetch [-146AadFlMmnPpqRrsUv] [-B bytes] [-N file] [-o file] [-S bytes]", 773 " [-T seconds] [-w seconds] [-i file] -h host -f file [-c dir]"); 774 } 775 776 777 /* 778 * Entry point 779 */ 780 int 781 main(int argc, char *argv[]) 782 { 783 struct stat sb; 784 struct sigaction sa; 785 const char *p, *s; 786 char *end, *q; 787 int c, e, r; 788 789 while ((c = getopt(argc, argv, 790 "146AaB:bc:dFf:Hh:i:lMmN:nPpo:qRrS:sT:tUvw:")) != -1) 791 switch (c) { 792 case '1': 793 once_flag = 1; 794 break; 795 case '4': 796 family = PF_INET; 797 break; 798 case '6': 799 family = PF_INET6; 800 break; 801 case 'A': 802 A_flag = 1; 803 break; 804 case 'a': 805 a_flag = 1; 806 break; 807 case 'B': 808 B_size = (off_t)strtol(optarg, &end, 10); 809 if (*optarg == '\0' || *end != '\0') 810 errx(1, "invalid buffer size (%s)", optarg); 811 break; 812 case 'b': 813 warnx("warning: the -b option is deprecated"); 814 b_flag = 1; 815 break; 816 case 'c': 817 c_dirname = optarg; 818 break; 819 case 'd': 820 d_flag = 1; 821 break; 822 case 'F': 823 F_flag = 1; 824 break; 825 case 'f': 826 f_filename = optarg; 827 break; 828 case 'H': 829 warnx("the -H option is now implicit, " 830 "use -U to disable"); 831 break; 832 case 'h': 833 h_hostname = optarg; 834 break; 835 case 'i': 836 i_flag = 1; 837 i_filename = optarg; 838 break; 839 case 'l': 840 l_flag = 1; 841 break; 842 case 'o': 843 o_flag = 1; 844 o_filename = optarg; 845 break; 846 case 'M': 847 case 'm': 848 if (r_flag) 849 errx(1, "the -m and -r flags " 850 "are mutually exclusive"); 851 m_flag = 1; 852 break; 853 case 'N': 854 N_filename = optarg; 855 break; 856 case 'n': 857 n_flag = 1; 858 break; 859 case 'P': 860 case 'p': 861 p_flag = 1; 862 break; 863 case 'q': 864 v_level = 0; 865 break; 866 case 'R': 867 R_flag = 1; 868 break; 869 case 'r': 870 if (m_flag) 871 errx(1, "the -m and -r flags " 872 "are mutually exclusive"); 873 r_flag = 1; 874 break; 875 case 'S': 876 S_size = (off_t)strtol(optarg, &end, 10); 877 if (*optarg == '\0' || *end != '\0') 878 errx(1, "invalid size (%s)", optarg); 879 break; 880 case 's': 881 s_flag = 1; 882 break; 883 case 'T': 884 T_secs = strtol(optarg, &end, 10); 885 if (*optarg == '\0' || *end != '\0') 886 errx(1, "invalid timeout (%s)", optarg); 887 break; 888 case 't': 889 t_flag = 1; 890 warnx("warning: the -t option is deprecated"); 891 break; 892 case 'U': 893 U_flag = 1; 894 break; 895 case 'v': 896 v_level++; 897 break; 898 case 'w': 899 a_flag = 1; 900 w_secs = strtol(optarg, &end, 10); 901 if (*optarg == '\0' || *end != '\0') 902 errx(1, "invalid delay (%s)", optarg); 903 break; 904 default: 905 usage(); 906 exit(1); 907 } 908 909 argc -= optind; 910 argv += optind; 911 912 if (h_hostname || f_filename || c_dirname) { 913 if (!h_hostname || !f_filename || argc) { 914 usage(); 915 exit(1); 916 } 917 /* XXX this is a hack. */ 918 if (strcspn(h_hostname, "@:/") != strlen(h_hostname)) 919 errx(1, "invalid hostname"); 920 if (asprintf(argv, "ftp://%s/%s/%s", h_hostname, 921 c_dirname ? c_dirname : "", f_filename) == -1) 922 errx(1, "%s", strerror(ENOMEM)); 923 argc++; 924 } 925 926 if (!argc) { 927 usage(); 928 exit(1); 929 } 930 931 /* allocate buffer */ 932 if (B_size < MINBUFSIZE) 933 B_size = MINBUFSIZE; 934 if ((buf = malloc(B_size)) == NULL) 935 errx(1, "%s", strerror(ENOMEM)); 936 937 /* timeouts */ 938 if ((s = getenv("FTP_TIMEOUT")) != NULL) { 939 ftp_timeout = strtol(s, &end, 10); 940 if (*s == '\0' || *end != '\0' || ftp_timeout < 0) { 941 warnx("FTP_TIMEOUT (%s) is not a positive integer", s); 942 ftp_timeout = 0; 943 } 944 } 945 if ((s = getenv("HTTP_TIMEOUT")) != NULL) { 946 http_timeout = strtol(s, &end, 10); 947 if (*s == '\0' || *end != '\0' || http_timeout < 0) { 948 warnx("HTTP_TIMEOUT (%s) is not a positive integer", s); 949 http_timeout = 0; 950 } 951 } 952 953 /* signal handling */ 954 sa.sa_flags = 0; 955 sa.sa_handler = sig_handler; 956 sigemptyset(&sa.sa_mask); 957 sigaction(SIGALRM, &sa, NULL); 958 sa.sa_flags = SA_RESETHAND; 959 sigaction(SIGINT, &sa, NULL); 960 fetchRestartCalls = 0; 961 962 /* output file */ 963 if (o_flag) { 964 if (strcmp(o_filename, "-") == 0) { 965 o_stdout = 1; 966 } else if (stat(o_filename, &sb) == -1) { 967 if (errno == ENOENT) { 968 if (argc > 1) 969 errx(1, "%s is not a directory", 970 o_filename); 971 } else { 972 err(1, "%s", o_filename); 973 } 974 } else { 975 if (sb.st_mode & S_IFDIR) 976 o_directory = 1; 977 } 978 } 979 980 /* check if output is to a tty (for progress report) */ 981 v_tty = isatty(STDERR_FILENO); 982 if (v_tty) 983 pgrp = getpgrp(); 984 985 r = 0; 986 987 /* authentication */ 988 if (v_tty) 989 fetchAuthMethod = query_auth; 990 if (N_filename != NULL) 991 setenv("NETRC", N_filename, 1); 992 993 while (argc) { 994 if ((p = strrchr(*argv, '/')) == NULL) 995 p = *argv; 996 else 997 p++; 998 999 if (!*p) 1000 p = "fetch.out"; 1001 1002 fetchLastErrCode = 0; 1003 1004 if (o_flag) { 1005 if (o_stdout) { 1006 e = fetch(*argv, "-"); 1007 } else if (o_directory) { 1008 asprintf(&q, "%s/%s", o_filename, p); 1009 e = fetch(*argv, q); 1010 free(q); 1011 } else { 1012 e = fetch(*argv, o_filename); 1013 } 1014 } else { 1015 e = fetch(*argv, p); 1016 } 1017 1018 if (sigint) 1019 kill(getpid(), SIGINT); 1020 1021 if (e == 0 && once_flag) 1022 exit(0); 1023 1024 if (e) { 1025 r = 1; 1026 if ((fetchLastErrCode 1027 && fetchLastErrCode != FETCH_UNAVAIL 1028 && fetchLastErrCode != FETCH_MOVED 1029 && fetchLastErrCode != FETCH_URL 1030 && fetchLastErrCode != FETCH_RESOLV 1031 && fetchLastErrCode != FETCH_UNKNOWN)) { 1032 if (w_secs && v_level) 1033 fprintf(stderr, "Waiting %ld seconds " 1034 "before retrying\n", w_secs); 1035 if (w_secs) 1036 sleep(w_secs); 1037 if (a_flag) 1038 continue; 1039 } 1040 } 1041 1042 argc--, argv++; 1043 } 1044 1045 exit(r); 1046 } 1047