1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 2000-2014 Dag-Erling Smørgrav 5 * Copyright (c) 2013 Michael Gmelin <freebsd@grem.de> 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer 13 * in this position and unchanged. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. The name of the author may not be used to endorse or promote products 18 * derived from this software without specific prior written permission 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 21 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 22 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 23 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 24 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 25 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 29 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 __FBSDID("$FreeBSD$"); 34 35 #include <sys/param.h> 36 #include <sys/socket.h> 37 #include <sys/stat.h> 38 #include <sys/time.h> 39 40 #include <ctype.h> 41 #include <err.h> 42 #include <errno.h> 43 #include <getopt.h> 44 #include <signal.h> 45 #include <stdint.h> 46 #include <stdio.h> 47 #include <stdlib.h> 48 #include <string.h> 49 #include <termios.h> 50 #include <unistd.h> 51 52 #include <fetch.h> 53 54 #define MINBUFSIZE 16384 55 #define TIMEOUT 120 56 57 /* Option flags */ 58 static int A_flag; /* -A: do not follow 302 redirects */ 59 static int a_flag; /* -a: auto retry */ 60 static off_t B_size; /* -B: buffer size */ 61 static int b_flag; /*! -b: workaround TCP bug */ 62 static char *c_dirname; /* -c: remote directory */ 63 static int d_flag; /* -d: direct connection */ 64 static int F_flag; /* -F: restart without checking mtime */ 65 static char *f_filename; /* -f: file to fetch */ 66 static char *h_hostname; /* -h: host to fetch from */ 67 static int i_flag; /* -i: specify file for mtime comparison */ 68 static char *i_filename; /* name of input file */ 69 static int l_flag; /* -l: link rather than copy file: URLs */ 70 static int m_flag; /* -[Mm]: mirror mode */ 71 static char *N_filename; /* -N: netrc file name */ 72 static int n_flag; /* -n: do not preserve modification time */ 73 static int o_flag; /* -o: specify output file */ 74 static int o_directory; /* output file is a directory */ 75 static char *o_filename; /* name of output file */ 76 static int o_stdout; /* output file is stdout */ 77 static int once_flag; /* -1: stop at first successful file */ 78 static int p_flag; /* -[Pp]: use passive FTP */ 79 static int R_flag; /* -R: don't delete partial files */ 80 static int r_flag; /* -r: restart previous transfer */ 81 static off_t S_size; /* -S: require size to match */ 82 static int s_flag; /* -s: show size, don't fetch */ 83 static long T_secs; /* -T: transfer timeout in seconds */ 84 static int t_flag; /*! -t: workaround TCP bug */ 85 static int U_flag; /* -U: do not use high ports */ 86 static int v_level = 1; /* -v: verbosity level */ 87 static int v_tty; /* stdout is a tty */ 88 static pid_t pgrp; /* our process group */ 89 static long w_secs; /* -w: retry delay */ 90 static int family = PF_UNSPEC; /* -[46]: address family to use */ 91 92 static int sigalrm; /* SIGALRM received */ 93 static int siginfo; /* SIGINFO received */ 94 static int sigint; /* SIGINT received */ 95 96 static long ftp_timeout = TIMEOUT; /* default timeout for FTP transfers */ 97 static long http_timeout = TIMEOUT;/* default timeout for HTTP transfers */ 98 static char *buf; /* transfer buffer */ 99 100 enum options 101 { 102 OPTION_BIND_ADDRESS, 103 OPTION_NO_FTP_PASSIVE_MODE, 104 OPTION_HTTP_REFERER, 105 OPTION_HTTP_USER_AGENT, 106 OPTION_NO_PROXY, 107 OPTION_SSL_CA_CERT_FILE, 108 OPTION_SSL_CA_CERT_PATH, 109 OPTION_SSL_CLIENT_CERT_FILE, 110 OPTION_SSL_CLIENT_KEY_FILE, 111 OPTION_SSL_CRL_FILE, 112 OPTION_SSL_NO_SSL3, 113 OPTION_SSL_NO_TLS1, 114 OPTION_SSL_NO_VERIFY_HOSTNAME, 115 OPTION_SSL_NO_VERIFY_PEER 116 }; 117 118 119 static struct option longopts[] = 120 { 121 /* mapping to single character argument */ 122 { "one-file", no_argument, NULL, '1' }, 123 { "ipv4-only", no_argument, NULL, '4' }, 124 { "ipv6-only", no_argument, NULL, '6' }, 125 { "no-redirect", no_argument, NULL, 'A' }, 126 { "retry", no_argument, NULL, 'a' }, 127 { "buffer-size", required_argument, NULL, 'B' }, 128 /* -c not mapped, since it's deprecated */ 129 { "direct", no_argument, NULL, 'd' }, 130 { "force-restart", no_argument, NULL, 'F' }, 131 /* -f not mapped, since it's deprecated */ 132 /* -h not mapped, since it's deprecated */ 133 { "if-modified-since", required_argument, NULL, 'i' }, 134 { "symlink", no_argument, NULL, 'l' }, 135 /* -M not mapped since it's the same as -m */ 136 { "mirror", no_argument, NULL, 'm' }, 137 { "netrc", required_argument, NULL, 'N' }, 138 { "no-mtime", no_argument, NULL, 'n' }, 139 { "output", required_argument, NULL, 'o' }, 140 /* -P not mapped since it's the same as -p */ 141 { "passive", no_argument, NULL, 'p' }, 142 { "quiet", no_argument, NULL, 'q' }, 143 { "keep-output", no_argument, NULL, 'R' }, 144 { "restart", no_argument, NULL, 'r' }, 145 { "require-size", required_argument, NULL, 'S' }, 146 { "print-size", no_argument, NULL, 's' }, 147 { "timeout", required_argument, NULL, 'T' }, 148 { "passive-portrange-default", no_argument, NULL, 'T' }, 149 { "verbose", no_argument, NULL, 'v' }, 150 { "retry-delay", required_argument, NULL, 'w' }, 151 152 /* options without a single character equivalent */ 153 { "bind-address", required_argument, NULL, OPTION_BIND_ADDRESS }, 154 { "no-passive", no_argument, NULL, OPTION_NO_FTP_PASSIVE_MODE }, 155 { "referer", required_argument, NULL, OPTION_HTTP_REFERER }, 156 { "user-agent", required_argument, NULL, OPTION_HTTP_USER_AGENT }, 157 { "no-proxy", required_argument, NULL, OPTION_NO_PROXY }, 158 { "ca-cert", required_argument, NULL, OPTION_SSL_CA_CERT_FILE }, 159 { "ca-path", required_argument, NULL, OPTION_SSL_CA_CERT_PATH }, 160 { "cert", required_argument, NULL, OPTION_SSL_CLIENT_CERT_FILE }, 161 { "key", required_argument, NULL, OPTION_SSL_CLIENT_KEY_FILE }, 162 { "crl", required_argument, NULL, OPTION_SSL_CRL_FILE }, 163 { "no-sslv3", no_argument, NULL, OPTION_SSL_NO_SSL3 }, 164 { "no-tlsv1", no_argument, NULL, OPTION_SSL_NO_TLS1 }, 165 { "no-verify-hostname", no_argument, NULL, OPTION_SSL_NO_VERIFY_HOSTNAME }, 166 { "no-verify-peer", no_argument, NULL, OPTION_SSL_NO_VERIFY_PEER }, 167 168 { NULL, 0, NULL, 0 } 169 }; 170 171 /* 172 * Signal handler 173 */ 174 static void 175 sig_handler(int sig) 176 { 177 switch (sig) { 178 case SIGALRM: 179 sigalrm = 1; 180 break; 181 case SIGINFO: 182 siginfo = 1; 183 break; 184 case SIGINT: 185 sigint = 1; 186 break; 187 } 188 } 189 190 struct xferstat { 191 char name[64]; 192 struct timeval start; /* start of transfer */ 193 struct timeval last; /* time of last update */ 194 struct timeval last2; /* time of previous last update */ 195 off_t size; /* size of file per HTTP hdr */ 196 off_t offset; /* starting offset in file */ 197 off_t rcvd; /* bytes already received */ 198 off_t lastrcvd; /* bytes received since last update */ 199 }; 200 201 /* 202 * Compute and display ETA 203 */ 204 static const char * 205 stat_eta(struct xferstat *xs) 206 { 207 static char str[16]; 208 long elapsed, eta; 209 off_t received, expected; 210 211 elapsed = xs->last.tv_sec - xs->start.tv_sec; 212 received = xs->rcvd - xs->offset; 213 expected = xs->size - xs->rcvd; 214 eta = (long)((double)elapsed * expected / received); 215 if (eta > 3600) 216 snprintf(str, sizeof str, "%02ldh%02ldm", 217 eta / 3600, (eta % 3600) / 60); 218 else if (eta > 0) 219 snprintf(str, sizeof str, "%02ldm%02lds", 220 eta / 60, eta % 60); 221 else 222 snprintf(str, sizeof str, "%02ldm%02lds", 223 elapsed / 60, elapsed % 60); 224 return (str); 225 } 226 227 /* 228 * Format a number as "xxxx YB" where Y is ' ', 'k', 'M'... 229 */ 230 static const char *prefixes = " kMGTP"; 231 static const char * 232 stat_bytes(off_t bytes) 233 { 234 static char str[16]; 235 const char *prefix = prefixes; 236 237 while (bytes > 9999 && prefix[1] != '\0') { 238 bytes /= 1024; 239 prefix++; 240 } 241 snprintf(str, sizeof str, "%4jd %cB", (intmax_t)bytes, *prefix); 242 return (str); 243 } 244 245 /* 246 * Compute and display transfer rate 247 */ 248 static const char * 249 stat_bps(struct xferstat *xs) 250 { 251 static char str[16]; 252 double delta, bps; 253 254 delta = (xs->last.tv_sec + (xs->last.tv_usec / 1.e6)) 255 - (xs->last2.tv_sec + (xs->last2.tv_usec / 1.e6)); 256 257 if (delta == 0.0) { 258 snprintf(str, sizeof str, "?? Bps"); 259 } else { 260 bps = (xs->rcvd - xs->lastrcvd) / delta; 261 snprintf(str, sizeof str, "%sps", stat_bytes((off_t)bps)); 262 } 263 return (str); 264 } 265 266 /* 267 * Update the stats display 268 */ 269 static void 270 stat_display(struct xferstat *xs, int force) 271 { 272 struct timeval now; 273 int ctty_pgrp; 274 275 /* check if we're the foreground process */ 276 if (ioctl(STDERR_FILENO, TIOCGPGRP, &ctty_pgrp) == -1 || 277 (pid_t)ctty_pgrp != pgrp) 278 return; 279 280 gettimeofday(&now, NULL); 281 if (!force && now.tv_sec <= xs->last.tv_sec) 282 return; 283 xs->last2 = xs->last; 284 xs->last = now; 285 286 fprintf(stderr, "\r%-46.46s", xs->name); 287 if (xs->size <= 0) { 288 setproctitle("%s [%s]", xs->name, stat_bytes(xs->rcvd)); 289 fprintf(stderr, " %s", stat_bytes(xs->rcvd)); 290 } else { 291 setproctitle("%s [%d%% of %s]", xs->name, 292 (int)((100.0 * xs->rcvd) / xs->size), 293 stat_bytes(xs->size)); 294 fprintf(stderr, "%3d%% of %s", 295 (int)((100.0 * xs->rcvd) / xs->size), 296 stat_bytes(xs->size)); 297 } 298 if (force == 2) { 299 xs->lastrcvd = xs->offset; 300 xs->last2 = xs->start; 301 } 302 fprintf(stderr, " %s", stat_bps(xs)); 303 if ((xs->size > 0 && xs->rcvd > 0 && 304 xs->last.tv_sec >= xs->start.tv_sec + 3) || 305 force == 2) 306 fprintf(stderr, " %s", stat_eta(xs)); 307 xs->lastrcvd = xs->rcvd; 308 } 309 310 /* 311 * Initialize the transfer statistics 312 */ 313 static void 314 stat_start(struct xferstat *xs, const char *name, off_t size, off_t offset) 315 { 316 snprintf(xs->name, sizeof xs->name, "%s", name); 317 gettimeofday(&xs->start, NULL); 318 xs->last.tv_sec = xs->last.tv_usec = 0; 319 xs->size = size; 320 xs->offset = offset; 321 xs->rcvd = offset; 322 xs->lastrcvd = offset; 323 if (v_tty && v_level > 0) 324 stat_display(xs, 1); 325 else if (v_level > 0) 326 fprintf(stderr, "%-46s", xs->name); 327 } 328 329 /* 330 * Update the transfer statistics 331 */ 332 static void 333 stat_update(struct xferstat *xs, off_t rcvd) 334 { 335 xs->rcvd = rcvd; 336 if (v_tty && v_level > 0) 337 stat_display(xs, 0); 338 } 339 340 /* 341 * Finalize the transfer statistics 342 */ 343 static void 344 stat_end(struct xferstat *xs) 345 { 346 gettimeofday(&xs->last, NULL); 347 if (v_tty && v_level > 0) { 348 stat_display(xs, 2); 349 putc('\n', stderr); 350 } else if (v_level > 0) { 351 fprintf(stderr, " %s %s\n", 352 stat_bytes(xs->size), stat_bps(xs)); 353 } 354 } 355 356 /* 357 * Ask the user for authentication details 358 */ 359 static int 360 query_auth(struct url *URL) 361 { 362 struct termios tios; 363 tcflag_t saved_flags; 364 int i, nopwd; 365 366 fprintf(stderr, "Authentication required for <%s://%s:%d/>!\n", 367 URL->scheme, URL->host, URL->port); 368 369 fprintf(stderr, "Login: "); 370 if (fgets(URL->user, sizeof URL->user, stdin) == NULL) 371 return (-1); 372 for (i = strlen(URL->user); i >= 0; --i) 373 if (URL->user[i] == '\r' || URL->user[i] == '\n') 374 URL->user[i] = '\0'; 375 376 fprintf(stderr, "Password: "); 377 if (tcgetattr(STDIN_FILENO, &tios) == 0) { 378 saved_flags = tios.c_lflag; 379 tios.c_lflag &= ~ECHO; 380 tios.c_lflag |= ECHONL|ICANON; 381 tcsetattr(STDIN_FILENO, TCSAFLUSH|TCSASOFT, &tios); 382 nopwd = (fgets(URL->pwd, sizeof URL->pwd, stdin) == NULL); 383 tios.c_lflag = saved_flags; 384 tcsetattr(STDIN_FILENO, TCSANOW|TCSASOFT, &tios); 385 } else { 386 nopwd = (fgets(URL->pwd, sizeof URL->pwd, stdin) == NULL); 387 } 388 if (nopwd) 389 return (-1); 390 for (i = strlen(URL->pwd); i >= 0; --i) 391 if (URL->pwd[i] == '\r' || URL->pwd[i] == '\n') 392 URL->pwd[i] = '\0'; 393 394 return (0); 395 } 396 397 /* 398 * Fetch a file 399 */ 400 static int 401 fetch(char *URL, const char *path) 402 { 403 struct url *url; 404 struct url_stat us; 405 struct stat sb, nsb; 406 struct xferstat xs; 407 FILE *f, *of; 408 size_t size, readcnt, wr; 409 off_t count; 410 char flags[8]; 411 const char *slash; 412 char *tmppath; 413 int r; 414 unsigned timeout; 415 char *ptr; 416 417 f = of = NULL; 418 tmppath = NULL; 419 420 timeout = 0; 421 *flags = 0; 422 count = 0; 423 424 /* set verbosity level */ 425 if (v_level > 1) 426 strcat(flags, "v"); 427 if (v_level > 2) 428 fetchDebug = 1; 429 430 /* parse URL */ 431 url = NULL; 432 if (*URL == '\0') { 433 warnx("empty URL"); 434 goto failure; 435 } 436 if ((url = fetchParseURL(URL)) == NULL) { 437 warnx("%s: parse error", URL); 438 goto failure; 439 } 440 441 /* if no scheme was specified, take a guess */ 442 if (!*url->scheme) { 443 if (!*url->host) 444 strcpy(url->scheme, SCHEME_FILE); 445 else if (strncasecmp(url->host, "ftp.", 4) == 0) 446 strcpy(url->scheme, SCHEME_FTP); 447 else if (strncasecmp(url->host, "www.", 4) == 0) 448 strcpy(url->scheme, SCHEME_HTTP); 449 } 450 451 /* common flags */ 452 switch (family) { 453 case PF_INET: 454 strcat(flags, "4"); 455 break; 456 case PF_INET6: 457 strcat(flags, "6"); 458 break; 459 } 460 461 /* FTP specific flags */ 462 if (strcmp(url->scheme, SCHEME_FTP) == 0) { 463 if (p_flag) 464 strcat(flags, "p"); 465 if (d_flag) 466 strcat(flags, "d"); 467 if (U_flag) 468 strcat(flags, "l"); 469 timeout = T_secs ? T_secs : ftp_timeout; 470 } 471 472 /* HTTP specific flags */ 473 if (strcmp(url->scheme, SCHEME_HTTP) == 0 || 474 strcmp(url->scheme, SCHEME_HTTPS) == 0) { 475 if (d_flag) 476 strcat(flags, "d"); 477 if (A_flag) 478 strcat(flags, "A"); 479 timeout = T_secs ? T_secs : http_timeout; 480 if (i_flag) { 481 if (stat(i_filename, &sb)) { 482 warn("%s: stat()", i_filename); 483 goto failure; 484 } 485 url->ims_time = sb.st_mtime; 486 strcat(flags, "i"); 487 } 488 } 489 490 /* set the protocol timeout. */ 491 fetchTimeout = timeout; 492 493 /* just print size */ 494 if (s_flag) { 495 if (timeout) 496 alarm(timeout); 497 r = fetchStat(url, &us, flags); 498 if (timeout) 499 alarm(0); 500 if (sigalrm || sigint) 501 goto signal; 502 if (r == -1) { 503 warnx("%s", fetchLastErrString); 504 goto failure; 505 } 506 if (us.size == -1) 507 printf("Unknown\n"); 508 else 509 printf("%jd\n", (intmax_t)us.size); 510 goto success; 511 } 512 513 /* 514 * If the -r flag was specified, we have to compare the local 515 * and remote files, so we should really do a fetchStat() 516 * first, but I know of at least one HTTP server that only 517 * sends the content size in response to GET requests, and 518 * leaves it out of replies to HEAD requests. Also, in the 519 * (frequent) case that the local and remote files match but 520 * the local file is truncated, we have sufficient information 521 * before the compare to issue a correct request. Therefore, 522 * we always issue a GET request as if we were sure the local 523 * file was a truncated copy of the remote file; we can drop 524 * the connection later if we change our minds. 525 */ 526 sb.st_size = -1; 527 if (!o_stdout) { 528 r = stat(path, &sb); 529 if (r == 0 && r_flag && S_ISREG(sb.st_mode)) { 530 url->offset = sb.st_size; 531 } else if (r == -1 || !S_ISREG(sb.st_mode)) { 532 /* 533 * Whatever value sb.st_size has now is either 534 * wrong (if stat(2) failed) or irrelevant (if the 535 * path does not refer to a regular file) 536 */ 537 sb.st_size = -1; 538 } 539 if (r == -1 && errno != ENOENT) { 540 warnx("%s: stat()", path); 541 goto failure; 542 } 543 } 544 545 /* start the transfer */ 546 if (timeout) 547 alarm(timeout); 548 f = fetchXGet(url, &us, flags); 549 if (timeout) 550 alarm(0); 551 if (sigalrm || sigint) 552 goto signal; 553 if (f == NULL) { 554 warnx("%s: %s", URL, fetchLastErrString); 555 if (i_flag && (strcmp(url->scheme, SCHEME_HTTP) == 0 || 556 strcmp(url->scheme, SCHEME_HTTPS) == 0) && 557 fetchLastErrCode == FETCH_OK && 558 strcmp(fetchLastErrString, "Not Modified") == 0) { 559 /* HTTP Not Modified Response, return OK. */ 560 r = 0; 561 goto done; 562 } else 563 goto failure; 564 } 565 if (sigint) 566 goto signal; 567 568 /* check that size is as expected */ 569 if (S_size) { 570 if (us.size == -1) { 571 warnx("%s: size unknown", URL); 572 } else if (us.size != S_size) { 573 warnx("%s: size mismatch: expected %jd, actual %jd", 574 URL, (intmax_t)S_size, (intmax_t)us.size); 575 goto failure; 576 } 577 } 578 579 /* symlink instead of copy */ 580 if (l_flag && strcmp(url->scheme, "file") == 0 && !o_stdout) { 581 if (symlink(url->doc, path) == -1) { 582 warn("%s: symlink()", path); 583 goto failure; 584 } 585 goto success; 586 } 587 588 if (us.size == -1 && !o_stdout && v_level > 0) 589 warnx("%s: size of remote file is not known", URL); 590 if (v_level > 1) { 591 if (sb.st_size != -1) 592 fprintf(stderr, "local size / mtime: %jd / %ld\n", 593 (intmax_t)sb.st_size, (long)sb.st_mtime); 594 if (us.size != -1) 595 fprintf(stderr, "remote size / mtime: %jd / %ld\n", 596 (intmax_t)us.size, (long)us.mtime); 597 } 598 599 /* open output file */ 600 if (o_stdout) { 601 /* output to stdout */ 602 of = stdout; 603 } else if (r_flag && sb.st_size != -1) { 604 /* resume mode, local file exists */ 605 if (!F_flag && us.mtime && sb.st_mtime != us.mtime) { 606 /* no match! have to refetch */ 607 fclose(f); 608 /* if precious, warn the user and give up */ 609 if (R_flag) { 610 warnx("%s: local modification time " 611 "does not match remote", path); 612 goto failure_keep; 613 } 614 } else if (url->offset > sb.st_size) { 615 /* gap between what we asked for and what we got */ 616 warnx("%s: gap in resume mode", URL); 617 fclose(of); 618 of = NULL; 619 /* picked up again later */ 620 } else if (us.size != -1) { 621 if (us.size == sb.st_size) 622 /* nothing to do */ 623 goto success; 624 if (sb.st_size > us.size) { 625 /* local file too long! */ 626 warnx("%s: local file (%jd bytes) is longer " 627 "than remote file (%jd bytes)", path, 628 (intmax_t)sb.st_size, (intmax_t)us.size); 629 goto failure; 630 } 631 /* we got it, open local file */ 632 if ((of = fopen(path, "r+")) == NULL) { 633 warn("%s: fopen()", path); 634 goto failure; 635 } 636 /* check that it didn't move under our feet */ 637 if (fstat(fileno(of), &nsb) == -1) { 638 /* can't happen! */ 639 warn("%s: fstat()", path); 640 goto failure; 641 } 642 if (nsb.st_dev != sb.st_dev || 643 nsb.st_ino != sb.st_ino || 644 nsb.st_size != sb.st_size) { 645 warnx("%s: file has changed", URL); 646 fclose(of); 647 of = NULL; 648 sb = nsb; 649 /* picked up again later */ 650 } 651 } 652 /* seek to where we left off */ 653 if (of != NULL && fseeko(of, url->offset, SEEK_SET) != 0) { 654 warn("%s: fseeko()", path); 655 fclose(of); 656 of = NULL; 657 /* picked up again later */ 658 } 659 } else if (m_flag && sb.st_size != -1) { 660 /* mirror mode, local file exists */ 661 if (sb.st_size == us.size && sb.st_mtime == us.mtime) 662 goto success; 663 } 664 665 if (of == NULL) { 666 /* 667 * We don't yet have an output file; either this is a 668 * vanilla run with no special flags, or the local and 669 * remote files didn't match. 670 */ 671 672 if (url->offset > 0) { 673 /* 674 * We tried to restart a transfer, but for 675 * some reason gave up - so we have to restart 676 * from scratch if we want the whole file 677 */ 678 url->offset = 0; 679 if ((f = fetchXGet(url, &us, flags)) == NULL) { 680 warnx("%s: %s", URL, fetchLastErrString); 681 goto failure; 682 } 683 if (sigint) 684 goto signal; 685 } 686 687 /* construct a temp file name */ 688 if (sb.st_size != -1 && S_ISREG(sb.st_mode)) { 689 if ((slash = strrchr(path, '/')) == NULL) 690 slash = path; 691 else 692 ++slash; 693 asprintf(&tmppath, "%.*s.fetch.XXXXXX.%s", 694 (int)(slash - path), path, slash); 695 if (tmppath != NULL) { 696 if (mkstemps(tmppath, strlen(slash) + 1) == -1) { 697 warn("%s: mkstemps()", path); 698 goto failure; 699 } 700 of = fopen(tmppath, "w"); 701 chown(tmppath, sb.st_uid, sb.st_gid); 702 chmod(tmppath, sb.st_mode & ALLPERMS); 703 } 704 } 705 if (of == NULL) 706 of = fopen(path, "w"); 707 if (of == NULL) { 708 warn("%s: open()", path); 709 goto failure; 710 } 711 } 712 count = url->offset; 713 714 /* start the counter */ 715 stat_start(&xs, path, us.size, count); 716 717 sigalrm = siginfo = sigint = 0; 718 719 /* suck in the data */ 720 setvbuf(f, NULL, _IOFBF, B_size); 721 signal(SIGINFO, sig_handler); 722 while (!sigint) { 723 if (us.size != -1 && us.size - count < B_size && 724 us.size - count >= 0) 725 size = us.size - count; 726 else 727 size = B_size; 728 if (siginfo) { 729 stat_end(&xs); 730 siginfo = 0; 731 } 732 733 if (size == 0) 734 break; 735 736 if ((readcnt = fread(buf, 1, size, f)) < size) { 737 if (ferror(f) && errno == EINTR && !sigint) 738 clearerr(f); 739 else if (readcnt == 0) 740 break; 741 } 742 743 stat_update(&xs, count += readcnt); 744 for (ptr = buf; readcnt > 0; ptr += wr, readcnt -= wr) 745 if ((wr = fwrite(ptr, 1, readcnt, of)) < readcnt) { 746 if (ferror(of) && errno == EINTR && !sigint) 747 clearerr(of); 748 else 749 break; 750 } 751 if (readcnt != 0) 752 break; 753 } 754 if (!sigalrm) 755 sigalrm = ferror(f) && errno == ETIMEDOUT; 756 signal(SIGINFO, SIG_DFL); 757 758 stat_end(&xs); 759 760 /* 761 * If the transfer timed out or was interrupted, we still want to 762 * set the mtime in case the file is not removed (-r or -R) and 763 * the user later restarts the transfer. 764 */ 765 signal: 766 /* set mtime of local file */ 767 if (!n_flag && us.mtime && !o_stdout && of != NULL && 768 (stat(path, &sb) != -1) && sb.st_mode & S_IFREG) { 769 struct timeval tv[2]; 770 771 fflush(of); 772 tv[0].tv_sec = (long)(us.atime ? us.atime : us.mtime); 773 tv[1].tv_sec = (long)us.mtime; 774 tv[0].tv_usec = tv[1].tv_usec = 0; 775 if (utimes(tmppath ? tmppath : path, tv)) 776 warn("%s: utimes()", tmppath ? tmppath : path); 777 } 778 779 /* timed out or interrupted? */ 780 if (sigalrm) 781 warnx("transfer timed out"); 782 if (sigint) { 783 warnx("transfer interrupted"); 784 goto failure; 785 } 786 787 /* timeout / interrupt before connection completley established? */ 788 if (f == NULL) 789 goto failure; 790 791 if (!sigalrm) { 792 /* check the status of our files */ 793 if (ferror(f)) 794 warn("%s", URL); 795 if (ferror(of)) 796 warn("%s", path); 797 if (ferror(f) || ferror(of)) 798 goto failure; 799 } 800 801 /* did the transfer complete normally? */ 802 if (us.size != -1 && count < us.size) { 803 warnx("%s appears to be truncated: %jd/%jd bytes", 804 path, (intmax_t)count, (intmax_t)us.size); 805 goto failure_keep; 806 } 807 808 /* 809 * If the transfer timed out and we didn't know how much to 810 * expect, assume the worst (i.e. we didn't get all of it) 811 */ 812 if (sigalrm && us.size == -1) { 813 warnx("%s may be truncated", path); 814 goto failure_keep; 815 } 816 817 success: 818 r = 0; 819 if (tmppath != NULL && rename(tmppath, path) == -1) { 820 warn("%s: rename()", path); 821 goto failure_keep; 822 } 823 goto done; 824 failure: 825 if (of && of != stdout && !R_flag && !r_flag) 826 if (stat(path, &sb) != -1 && (sb.st_mode & S_IFREG)) 827 unlink(tmppath ? tmppath : path); 828 if (R_flag && tmppath != NULL && sb.st_size == -1) 829 rename(tmppath, path); /* ignore errors here */ 830 failure_keep: 831 r = -1; 832 goto done; 833 done: 834 if (f) 835 fclose(f); 836 if (of && of != stdout) 837 fclose(of); 838 if (url) 839 fetchFreeURL(url); 840 if (tmppath != NULL) 841 free(tmppath); 842 return (r); 843 } 844 845 static void 846 usage(void) 847 { 848 fprintf(stderr, "%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n", 849 "usage: fetch [-146AadFlMmnPpqRrsUv] [-B bytes] [--bind-address=host]", 850 " [--ca-cert=file] [--ca-path=dir] [--cert=file] [--crl=file]", 851 " [-i file] [--key=file] [-N file] [--no-passive] [--no-proxy=list]", 852 " [--no-sslv3] [--no-tlsv1] [--no-verify-hostname] [--no-verify-peer]", 853 " [-o file] [--referer=URL] [-S bytes] [-T seconds]", 854 " [--user-agent=agent-string] [-w seconds] URL ...", 855 " fetch [-146AadFlMmnPpqRrsUv] [-B bytes] [--bind-address=host]", 856 " [--ca-cert=file] [--ca-path=dir] [--cert=file] [--crl=file]", 857 " [-i file] [--key=file] [-N file] [--no-passive] [--no-proxy=list]", 858 " [--no-sslv3] [--no-tlsv1] [--no-verify-hostname] [--no-verify-peer]", 859 " [-o file] [--referer=URL] [-S bytes] [-T seconds]", 860 " [--user-agent=agent-string] [-w seconds] -h host -f file [-c dir]"); 861 } 862 863 864 /* 865 * Entry point 866 */ 867 int 868 main(int argc, char *argv[]) 869 { 870 struct stat sb; 871 struct sigaction sa; 872 const char *p, *s; 873 char *end, *q; 874 int c, e, r; 875 876 877 while ((c = getopt_long(argc, argv, 878 "146AaB:bc:dFf:Hh:i:lMmN:nPpo:qRrS:sT:tUvw:", 879 longopts, NULL)) != -1) 880 switch (c) { 881 case '1': 882 once_flag = 1; 883 break; 884 case '4': 885 family = PF_INET; 886 break; 887 case '6': 888 family = PF_INET6; 889 break; 890 case 'A': 891 A_flag = 1; 892 break; 893 case 'a': 894 a_flag = 1; 895 break; 896 case 'B': 897 B_size = (off_t)strtol(optarg, &end, 10); 898 if (*optarg == '\0' || *end != '\0') 899 errx(1, "invalid buffer size (%s)", optarg); 900 break; 901 case 'b': 902 warnx("warning: the -b option is deprecated"); 903 b_flag = 1; 904 break; 905 case 'c': 906 c_dirname = optarg; 907 break; 908 case 'd': 909 d_flag = 1; 910 break; 911 case 'F': 912 F_flag = 1; 913 break; 914 case 'f': 915 f_filename = optarg; 916 break; 917 case 'H': 918 warnx("the -H option is now implicit, " 919 "use -U to disable"); 920 break; 921 case 'h': 922 h_hostname = optarg; 923 break; 924 case 'i': 925 i_flag = 1; 926 i_filename = optarg; 927 break; 928 case 'l': 929 l_flag = 1; 930 break; 931 case 'o': 932 o_flag = 1; 933 o_filename = optarg; 934 break; 935 case 'M': 936 case 'm': 937 if (r_flag) 938 errx(1, "the -m and -r flags " 939 "are mutually exclusive"); 940 m_flag = 1; 941 break; 942 case 'N': 943 N_filename = optarg; 944 break; 945 case 'n': 946 n_flag = 1; 947 break; 948 case 'P': 949 case 'p': 950 p_flag = 1; 951 break; 952 case 'q': 953 v_level = 0; 954 break; 955 case 'R': 956 R_flag = 1; 957 break; 958 case 'r': 959 if (m_flag) 960 errx(1, "the -m and -r flags " 961 "are mutually exclusive"); 962 r_flag = 1; 963 break; 964 case 'S': 965 S_size = (off_t)strtol(optarg, &end, 10); 966 if (*optarg == '\0' || *end != '\0') 967 errx(1, "invalid size (%s)", optarg); 968 break; 969 case 's': 970 s_flag = 1; 971 break; 972 case 'T': 973 T_secs = strtol(optarg, &end, 10); 974 if (*optarg == '\0' || *end != '\0') 975 errx(1, "invalid timeout (%s)", optarg); 976 break; 977 case 't': 978 t_flag = 1; 979 warnx("warning: the -t option is deprecated"); 980 break; 981 case 'U': 982 U_flag = 1; 983 break; 984 case 'v': 985 v_level++; 986 break; 987 case 'w': 988 a_flag = 1; 989 w_secs = strtol(optarg, &end, 10); 990 if (*optarg == '\0' || *end != '\0') 991 errx(1, "invalid delay (%s)", optarg); 992 break; 993 case OPTION_BIND_ADDRESS: 994 setenv("FETCH_BIND_ADDRESS", optarg, 1); 995 break; 996 case OPTION_NO_FTP_PASSIVE_MODE: 997 setenv("FTP_PASSIVE_MODE", "no", 1); 998 break; 999 case OPTION_HTTP_REFERER: 1000 setenv("HTTP_REFERER", optarg, 1); 1001 break; 1002 case OPTION_HTTP_USER_AGENT: 1003 setenv("HTTP_USER_AGENT", optarg, 1); 1004 break; 1005 case OPTION_NO_PROXY: 1006 setenv("NO_PROXY", optarg, 1); 1007 break; 1008 case OPTION_SSL_CA_CERT_FILE: 1009 setenv("SSL_CA_CERT_FILE", optarg, 1); 1010 break; 1011 case OPTION_SSL_CA_CERT_PATH: 1012 setenv("SSL_CA_CERT_PATH", optarg, 1); 1013 break; 1014 case OPTION_SSL_CLIENT_CERT_FILE: 1015 setenv("SSL_CLIENT_CERT_FILE", optarg, 1); 1016 break; 1017 case OPTION_SSL_CLIENT_KEY_FILE: 1018 setenv("SSL_CLIENT_KEY_FILE", optarg, 1); 1019 break; 1020 case OPTION_SSL_CRL_FILE: 1021 setenv("SSL_CLIENT_CRL_FILE", optarg, 1); 1022 break; 1023 case OPTION_SSL_NO_SSL3: 1024 setenv("SSL_NO_SSL3", "", 1); 1025 break; 1026 case OPTION_SSL_NO_TLS1: 1027 setenv("SSL_NO_TLS1", "", 1); 1028 break; 1029 case OPTION_SSL_NO_VERIFY_HOSTNAME: 1030 setenv("SSL_NO_VERIFY_HOSTNAME", "", 1); 1031 break; 1032 case OPTION_SSL_NO_VERIFY_PEER: 1033 setenv("SSL_NO_VERIFY_PEER", "", 1); 1034 break; 1035 default: 1036 usage(); 1037 exit(1); 1038 } 1039 1040 argc -= optind; 1041 argv += optind; 1042 1043 if (h_hostname || f_filename || c_dirname) { 1044 if (!h_hostname || !f_filename || argc) { 1045 usage(); 1046 exit(1); 1047 } 1048 /* XXX this is a hack. */ 1049 if (strcspn(h_hostname, "@:/") != strlen(h_hostname)) 1050 errx(1, "invalid hostname"); 1051 if (asprintf(argv, "ftp://%s/%s/%s", h_hostname, 1052 c_dirname ? c_dirname : "", f_filename) == -1) 1053 errx(1, "%s", strerror(ENOMEM)); 1054 argc++; 1055 } 1056 1057 if (!argc) { 1058 usage(); 1059 exit(1); 1060 } 1061 1062 /* allocate buffer */ 1063 if (B_size < MINBUFSIZE) 1064 B_size = MINBUFSIZE; 1065 if ((buf = malloc(B_size)) == NULL) 1066 errx(1, "%s", strerror(ENOMEM)); 1067 1068 /* timeouts */ 1069 if ((s = getenv("FTP_TIMEOUT")) != NULL) { 1070 ftp_timeout = strtol(s, &end, 10); 1071 if (*s == '\0' || *end != '\0' || ftp_timeout < 0) { 1072 warnx("FTP_TIMEOUT (%s) is not a positive integer", s); 1073 ftp_timeout = 0; 1074 } 1075 } 1076 if ((s = getenv("HTTP_TIMEOUT")) != NULL) { 1077 http_timeout = strtol(s, &end, 10); 1078 if (*s == '\0' || *end != '\0' || http_timeout < 0) { 1079 warnx("HTTP_TIMEOUT (%s) is not a positive integer", s); 1080 http_timeout = 0; 1081 } 1082 } 1083 1084 /* signal handling */ 1085 sa.sa_flags = 0; 1086 sa.sa_handler = sig_handler; 1087 sigemptyset(&sa.sa_mask); 1088 sigaction(SIGALRM, &sa, NULL); 1089 sa.sa_flags = SA_RESETHAND; 1090 sigaction(SIGINT, &sa, NULL); 1091 fetchRestartCalls = 0; 1092 1093 /* output file */ 1094 if (o_flag) { 1095 if (strcmp(o_filename, "-") == 0) { 1096 o_stdout = 1; 1097 } else if (stat(o_filename, &sb) == -1) { 1098 if (errno == ENOENT) { 1099 if (argc > 1) 1100 errx(1, "%s is not a directory", 1101 o_filename); 1102 } else { 1103 err(1, "%s", o_filename); 1104 } 1105 } else { 1106 if (sb.st_mode & S_IFDIR) 1107 o_directory = 1; 1108 } 1109 } 1110 1111 /* check if output is to a tty (for progress report) */ 1112 v_tty = isatty(STDERR_FILENO); 1113 if (v_tty) 1114 pgrp = getpgrp(); 1115 1116 r = 0; 1117 1118 /* authentication */ 1119 if (v_tty) 1120 fetchAuthMethod = query_auth; 1121 if (N_filename != NULL) 1122 if (setenv("NETRC", N_filename, 1) == -1) 1123 err(1, "setenv: cannot set NETRC=%s", N_filename); 1124 1125 while (argc) { 1126 if ((p = strrchr(*argv, '/')) == NULL) 1127 p = *argv; 1128 else 1129 p++; 1130 1131 if (!*p) 1132 p = "fetch.out"; 1133 1134 fetchLastErrCode = 0; 1135 1136 if (o_flag) { 1137 if (o_stdout) { 1138 e = fetch(*argv, "-"); 1139 } else if (o_directory) { 1140 asprintf(&q, "%s/%s", o_filename, p); 1141 e = fetch(*argv, q); 1142 free(q); 1143 } else { 1144 e = fetch(*argv, o_filename); 1145 } 1146 } else { 1147 e = fetch(*argv, p); 1148 } 1149 1150 if (sigint) 1151 kill(getpid(), SIGINT); 1152 1153 if (e == 0 && once_flag) 1154 exit(0); 1155 1156 if (e) { 1157 r = 1; 1158 if ((fetchLastErrCode 1159 && fetchLastErrCode != FETCH_UNAVAIL 1160 && fetchLastErrCode != FETCH_MOVED 1161 && fetchLastErrCode != FETCH_URL 1162 && fetchLastErrCode != FETCH_RESOLV 1163 && fetchLastErrCode != FETCH_UNKNOWN)) { 1164 if (w_secs && v_level) 1165 fprintf(stderr, "Waiting %ld seconds " 1166 "before retrying\n", w_secs); 1167 if (w_secs) 1168 sleep(w_secs); 1169 if (a_flag) 1170 continue; 1171 } 1172 } 1173 1174 argc--, argv++; 1175 } 1176 1177 exit(r); 1178 } 1179