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 int v_progress; /* whether to display progress */ 89 static pid_t pgrp; /* our process group */ 90 static long w_secs; /* -w: retry delay */ 91 static int family = PF_UNSPEC; /* -[46]: address family to use */ 92 93 static int sigalrm; /* SIGALRM received */ 94 static int siginfo; /* SIGINFO received */ 95 static int sigint; /* SIGINT received */ 96 97 static long ftp_timeout = TIMEOUT; /* default timeout for FTP transfers */ 98 static long http_timeout = TIMEOUT;/* default timeout for HTTP transfers */ 99 static char *buf; /* transfer buffer */ 100 101 enum options 102 { 103 OPTION_BIND_ADDRESS, 104 OPTION_NO_FTP_PASSIVE_MODE, 105 OPTION_HTTP_REFERER, 106 OPTION_HTTP_USER_AGENT, 107 OPTION_NO_PROXY, 108 OPTION_SSL_CA_CERT_FILE, 109 OPTION_SSL_CA_CERT_PATH, 110 OPTION_SSL_CLIENT_CERT_FILE, 111 OPTION_SSL_CLIENT_KEY_FILE, 112 OPTION_SSL_CRL_FILE, 113 OPTION_SSL_NO_SSL3, 114 OPTION_SSL_NO_TLS1, 115 OPTION_SSL_NO_VERIFY_HOSTNAME, 116 OPTION_SSL_NO_VERIFY_PEER 117 }; 118 119 120 static struct option longopts[] = 121 { 122 /* mapping to single character argument */ 123 { "one-file", no_argument, NULL, '1' }, 124 { "ipv4-only", no_argument, NULL, '4' }, 125 { "ipv6-only", no_argument, NULL, '6' }, 126 { "no-redirect", no_argument, NULL, 'A' }, 127 { "retry", no_argument, NULL, 'a' }, 128 { "buffer-size", required_argument, NULL, 'B' }, 129 /* -c not mapped, since it's deprecated */ 130 { "direct", no_argument, NULL, 'd' }, 131 { "force-restart", no_argument, NULL, 'F' }, 132 /* -f not mapped, since it's deprecated */ 133 /* -h not mapped, since it's deprecated */ 134 { "if-modified-since", required_argument, NULL, 'i' }, 135 { "symlink", no_argument, NULL, 'l' }, 136 /* -M not mapped since it's the same as -m */ 137 { "mirror", no_argument, NULL, 'm' }, 138 { "netrc", required_argument, NULL, 'N' }, 139 { "no-mtime", no_argument, NULL, 'n' }, 140 { "output", required_argument, NULL, 'o' }, 141 /* -P not mapped since it's the same as -p */ 142 { "passive", no_argument, NULL, 'p' }, 143 { "quiet", no_argument, NULL, 'q' }, 144 { "keep-output", no_argument, NULL, 'R' }, 145 { "restart", no_argument, NULL, 'r' }, 146 { "require-size", required_argument, NULL, 'S' }, 147 { "print-size", no_argument, NULL, 's' }, 148 { "timeout", required_argument, NULL, 'T' }, 149 { "passive-portrange-default", no_argument, NULL, 'T' }, 150 { "verbose", no_argument, NULL, 'v' }, 151 { "retry-delay", required_argument, NULL, 'w' }, 152 153 /* options without a single character equivalent */ 154 { "bind-address", required_argument, NULL, OPTION_BIND_ADDRESS }, 155 { "no-passive", no_argument, NULL, OPTION_NO_FTP_PASSIVE_MODE }, 156 { "referer", required_argument, NULL, OPTION_HTTP_REFERER }, 157 { "user-agent", required_argument, NULL, OPTION_HTTP_USER_AGENT }, 158 { "no-proxy", required_argument, NULL, OPTION_NO_PROXY }, 159 { "ca-cert", required_argument, NULL, OPTION_SSL_CA_CERT_FILE }, 160 { "ca-path", required_argument, NULL, OPTION_SSL_CA_CERT_PATH }, 161 { "cert", required_argument, NULL, OPTION_SSL_CLIENT_CERT_FILE }, 162 { "key", required_argument, NULL, OPTION_SSL_CLIENT_KEY_FILE }, 163 { "crl", required_argument, NULL, OPTION_SSL_CRL_FILE }, 164 { "no-sslv3", no_argument, NULL, OPTION_SSL_NO_SSL3 }, 165 { "no-tlsv1", no_argument, NULL, OPTION_SSL_NO_TLS1 }, 166 { "no-verify-hostname", no_argument, NULL, OPTION_SSL_NO_VERIFY_HOSTNAME }, 167 { "no-verify-peer", no_argument, NULL, OPTION_SSL_NO_VERIFY_PEER }, 168 169 { NULL, 0, NULL, 0 } 170 }; 171 172 /* 173 * Signal handler 174 */ 175 static void 176 sig_handler(int sig) 177 { 178 switch (sig) { 179 case SIGALRM: 180 sigalrm = 1; 181 break; 182 case SIGINFO: 183 siginfo = 1; 184 break; 185 case SIGINT: 186 sigint = 1; 187 break; 188 } 189 } 190 191 struct xferstat { 192 char name[64]; 193 struct timeval start; /* start of transfer */ 194 struct timeval last; /* time of last update */ 195 struct timeval last2; /* time of previous last update */ 196 off_t size; /* size of file per HTTP hdr */ 197 off_t offset; /* starting offset in file */ 198 off_t rcvd; /* bytes already received */ 199 off_t lastrcvd; /* bytes received since last update */ 200 }; 201 202 /* 203 * Format a number of seconds as either XXdYYh, XXhYYm, XXmYYs, or XXs 204 * depending on its magnitude 205 */ 206 static void 207 stat_seconds(char *str, size_t strsz, long seconds) 208 { 209 210 if (seconds > 86400) 211 snprintf(str, strsz, "%02ldd%02ldh", 212 seconds / 86400, (seconds % 86400) / 3600); 213 else if (seconds > 3600) 214 snprintf(str, strsz, "%02ldh%02ldm", 215 seconds / 3600, (seconds % 3600) / 60); 216 else if (seconds > 60) 217 snprintf(str, strsz, "%02ldm%02lds", 218 seconds / 60, seconds % 60); 219 else 220 snprintf(str, strsz, " %02lds", 221 seconds); 222 } 223 224 /* 225 * Compute and display ETA 226 */ 227 static void 228 stat_eta(char *str, size_t strsz, const struct xferstat *xs) 229 { 230 long elapsed, eta; 231 off_t received, expected; 232 233 elapsed = xs->last.tv_sec - xs->start.tv_sec; 234 received = xs->rcvd - xs->offset; 235 expected = xs->size - xs->rcvd; 236 eta = (long)((double)elapsed * expected / received); 237 if (eta > 0) 238 stat_seconds(str, strsz, eta); 239 else 240 stat_seconds(str, strsz, elapsed); 241 } 242 243 /* 244 * Format a number as "xxxx YB" where Y is ' ', 'k', 'M'... 245 */ 246 static const char *prefixes = " kMGTP"; 247 static void 248 stat_bytes(char *str, size_t strsz, off_t bytes) 249 { 250 const char *prefix = prefixes; 251 252 while (bytes > 9999 && prefix[1] != '\0') { 253 bytes /= 1024; 254 prefix++; 255 } 256 snprintf(str, strsz, "%4ju %cB", (uintmax_t)bytes, *prefix); 257 } 258 259 /* 260 * Compute and display transfer rate 261 */ 262 static void 263 stat_bps(char *str, size_t strsz, struct xferstat *xs) 264 { 265 char bytes[16]; 266 double delta, bps; 267 268 delta = ((double)xs->last.tv_sec + (xs->last.tv_usec / 1.e6)) 269 - ((double)xs->last2.tv_sec + (xs->last2.tv_usec / 1.e6)); 270 271 if (delta == 0.0) { 272 snprintf(str, strsz, "?? Bps"); 273 } else { 274 bps = (xs->rcvd - xs->lastrcvd) / delta; 275 stat_bytes(bytes, sizeof bytes, (off_t)bps); 276 snprintf(str, strsz, "%sps", bytes); 277 } 278 } 279 280 /* 281 * Update the stats display 282 */ 283 static void 284 stat_display(struct xferstat *xs, int force) 285 { 286 char bytes[16], bps[16], eta[16]; 287 struct timeval now; 288 int ctty_pgrp; 289 290 /* check if we're the foreground process */ 291 if (ioctl(STDERR_FILENO, TIOCGPGRP, &ctty_pgrp) != 0 || 292 (pid_t)ctty_pgrp != pgrp) 293 return; 294 295 gettimeofday(&now, NULL); 296 if (!force && now.tv_sec <= xs->last.tv_sec) 297 return; 298 xs->last2 = xs->last; 299 xs->last = now; 300 301 fprintf(stderr, "\r%-46.46s", xs->name); 302 if (xs->rcvd >= xs->size) { 303 stat_bytes(bytes, sizeof bytes, xs->rcvd); 304 setproctitle("%s [%s]", xs->name, bytes); 305 fprintf(stderr, " %s", bytes); 306 } else { 307 stat_bytes(bytes, sizeof bytes, xs->size); 308 setproctitle("%s [%d%% of %s]", xs->name, 309 (int)((100.0 * xs->rcvd) / xs->size), 310 bytes); 311 fprintf(stderr, "%3d%% of %s", 312 (int)((100.0 * xs->rcvd) / xs->size), 313 bytes); 314 } 315 if (force == 2) { 316 xs->lastrcvd = xs->offset; 317 xs->last2 = xs->start; 318 } 319 stat_bps(bps, sizeof bps, xs); 320 fprintf(stderr, " %s", bps); 321 if ((xs->size > 0 && xs->rcvd > 0 && 322 xs->last.tv_sec >= xs->start.tv_sec + 3) || 323 force == 2) { 324 stat_eta(eta, sizeof eta, xs); 325 fprintf(stderr, " %s", eta); 326 } 327 xs->lastrcvd = xs->rcvd; 328 } 329 330 /* 331 * Initialize the transfer statistics 332 */ 333 static void 334 stat_start(struct xferstat *xs, const char *name, off_t size, off_t offset) 335 { 336 337 memset(xs, 0, sizeof *xs); 338 snprintf(xs->name, sizeof xs->name, "%s", name); 339 gettimeofday(&xs->start, NULL); 340 xs->last2 = xs->last = xs->start; 341 xs->size = size; 342 xs->offset = offset; 343 xs->rcvd = offset; 344 xs->lastrcvd = offset; 345 if (v_progress) 346 stat_display(xs, 1); 347 else if (v_level > 0) 348 fprintf(stderr, "%-46s", xs->name); 349 } 350 351 /* 352 * Update the transfer statistics 353 */ 354 static void 355 stat_update(struct xferstat *xs, off_t rcvd) 356 { 357 358 xs->rcvd = rcvd; 359 if (v_progress) 360 stat_display(xs, 0); 361 } 362 363 /* 364 * Finalize the transfer statistics 365 */ 366 static void 367 stat_end(struct xferstat *xs) 368 { 369 char bytes[16], bps[16], eta[16]; 370 371 gettimeofday(&xs->last, NULL); 372 if (v_progress) { 373 stat_display(xs, 2); 374 putc('\n', stderr); 375 } else if (v_level > 0) { 376 stat_bytes(bytes, sizeof bytes, xs->rcvd); 377 stat_bps(bps, sizeof bps, xs); 378 stat_eta(eta, sizeof eta, xs); 379 fprintf(stderr, " %s %s %s\n", bytes, bps, eta); 380 } 381 } 382 383 /* 384 * Ask the user for authentication details 385 */ 386 static int 387 query_auth(struct url *URL) 388 { 389 struct termios tios; 390 tcflag_t saved_flags; 391 int i, nopwd; 392 393 fprintf(stderr, "Authentication required for <%s://%s:%d/>!\n", 394 URL->scheme, URL->host, URL->port); 395 396 fprintf(stderr, "Login: "); 397 if (fgets(URL->user, sizeof URL->user, stdin) == NULL) 398 return (-1); 399 for (i = strlen(URL->user); i >= 0; --i) 400 if (URL->user[i] == '\r' || URL->user[i] == '\n') 401 URL->user[i] = '\0'; 402 403 fprintf(stderr, "Password: "); 404 if (tcgetattr(STDIN_FILENO, &tios) == 0) { 405 saved_flags = tios.c_lflag; 406 tios.c_lflag &= ~ECHO; 407 tios.c_lflag |= ECHONL|ICANON; 408 tcsetattr(STDIN_FILENO, TCSAFLUSH|TCSASOFT, &tios); 409 nopwd = (fgets(URL->pwd, sizeof URL->pwd, stdin) == NULL); 410 tios.c_lflag = saved_flags; 411 tcsetattr(STDIN_FILENO, TCSANOW|TCSASOFT, &tios); 412 } else { 413 nopwd = (fgets(URL->pwd, sizeof URL->pwd, stdin) == NULL); 414 } 415 if (nopwd) 416 return (-1); 417 for (i = strlen(URL->pwd); i >= 0; --i) 418 if (URL->pwd[i] == '\r' || URL->pwd[i] == '\n') 419 URL->pwd[i] = '\0'; 420 421 return (0); 422 } 423 424 /* 425 * Fetch a file 426 */ 427 static int 428 fetch(char *URL, const char *path) 429 { 430 struct url *url; 431 struct url_stat us; 432 struct stat sb, nsb; 433 struct xferstat xs; 434 FILE *f, *of; 435 size_t size, readcnt, wr; 436 off_t count; 437 char flags[8]; 438 const char *slash; 439 char *tmppath; 440 int r; 441 unsigned timeout; 442 char *ptr; 443 444 f = of = NULL; 445 tmppath = NULL; 446 447 timeout = 0; 448 *flags = 0; 449 count = 0; 450 451 /* set verbosity level */ 452 if (v_level > 1) 453 strcat(flags, "v"); 454 if (v_level > 2) 455 fetchDebug = 1; 456 457 /* parse URL */ 458 url = NULL; 459 if (*URL == '\0') { 460 warnx("empty URL"); 461 goto failure; 462 } 463 if ((url = fetchParseURL(URL)) == NULL) { 464 warnx("%s: parse error", URL); 465 goto failure; 466 } 467 468 /* if no scheme was specified, take a guess */ 469 if (!*url->scheme) { 470 if (!*url->host) 471 strcpy(url->scheme, SCHEME_FILE); 472 else if (strncasecmp(url->host, "ftp.", 4) == 0) 473 strcpy(url->scheme, SCHEME_FTP); 474 else if (strncasecmp(url->host, "www.", 4) == 0) 475 strcpy(url->scheme, SCHEME_HTTP); 476 } 477 478 /* common flags */ 479 switch (family) { 480 case PF_INET: 481 strcat(flags, "4"); 482 break; 483 case PF_INET6: 484 strcat(flags, "6"); 485 break; 486 } 487 488 /* FTP specific flags */ 489 if (strcmp(url->scheme, SCHEME_FTP) == 0) { 490 if (p_flag) 491 strcat(flags, "p"); 492 if (d_flag) 493 strcat(flags, "d"); 494 if (U_flag) 495 strcat(flags, "l"); 496 timeout = T_secs ? T_secs : ftp_timeout; 497 } 498 499 /* HTTP specific flags */ 500 if (strcmp(url->scheme, SCHEME_HTTP) == 0 || 501 strcmp(url->scheme, SCHEME_HTTPS) == 0) { 502 if (d_flag) 503 strcat(flags, "d"); 504 if (A_flag) 505 strcat(flags, "A"); 506 timeout = T_secs ? T_secs : http_timeout; 507 if (i_flag) { 508 if (stat(i_filename, &sb)) { 509 warn("%s: stat()", i_filename); 510 goto failure; 511 } 512 url->ims_time = sb.st_mtime; 513 strcat(flags, "i"); 514 } 515 } 516 517 /* set the protocol timeout. */ 518 fetchTimeout = timeout; 519 520 /* just print size */ 521 if (s_flag) { 522 if (timeout) 523 alarm(timeout); 524 r = fetchStat(url, &us, flags); 525 if (timeout) 526 alarm(0); 527 if (sigalrm || sigint) 528 goto signal; 529 if (r == -1) { 530 warnx("%s", fetchLastErrString); 531 goto failure; 532 } 533 if (us.size == -1) 534 printf("Unknown\n"); 535 else 536 printf("%jd\n", (intmax_t)us.size); 537 goto success; 538 } 539 540 /* 541 * If the -r flag was specified, we have to compare the local 542 * and remote files, so we should really do a fetchStat() 543 * first, but I know of at least one HTTP server that only 544 * sends the content size in response to GET requests, and 545 * leaves it out of replies to HEAD requests. Also, in the 546 * (frequent) case that the local and remote files match but 547 * the local file is truncated, we have sufficient information 548 * before the compare to issue a correct request. Therefore, 549 * we always issue a GET request as if we were sure the local 550 * file was a truncated copy of the remote file; we can drop 551 * the connection later if we change our minds. 552 */ 553 sb.st_size = -1; 554 if (!o_stdout) { 555 r = stat(path, &sb); 556 if (r == 0 && r_flag && S_ISREG(sb.st_mode)) { 557 url->offset = sb.st_size; 558 } else if (r == -1 || !S_ISREG(sb.st_mode)) { 559 /* 560 * Whatever value sb.st_size has now is either 561 * wrong (if stat(2) failed) or irrelevant (if the 562 * path does not refer to a regular file) 563 */ 564 sb.st_size = -1; 565 } 566 if (r == -1 && errno != ENOENT) { 567 warnx("%s: stat()", path); 568 goto failure; 569 } 570 } 571 572 /* start the transfer */ 573 if (timeout) 574 alarm(timeout); 575 f = fetchXGet(url, &us, flags); 576 if (timeout) 577 alarm(0); 578 if (sigalrm || sigint) 579 goto signal; 580 if (f == NULL) { 581 warnx("%s: %s", URL, fetchLastErrString); 582 if (i_flag && (strcmp(url->scheme, SCHEME_HTTP) == 0 || 583 strcmp(url->scheme, SCHEME_HTTPS) == 0) && 584 fetchLastErrCode == FETCH_OK && 585 strcmp(fetchLastErrString, "Not Modified") == 0) { 586 /* HTTP Not Modified Response, return OK. */ 587 r = 0; 588 goto done; 589 } else 590 goto failure; 591 } 592 if (sigint) 593 goto signal; 594 595 /* check that size is as expected */ 596 if (S_size) { 597 if (us.size == -1) { 598 warnx("%s: size unknown", URL); 599 } else if (us.size != S_size) { 600 warnx("%s: size mismatch: expected %jd, actual %jd", 601 URL, (intmax_t)S_size, (intmax_t)us.size); 602 goto failure; 603 } 604 } 605 606 /* symlink instead of copy */ 607 if (l_flag && strcmp(url->scheme, "file") == 0 && !o_stdout) { 608 if (symlink(url->doc, path) == -1) { 609 warn("%s: symlink()", path); 610 goto failure; 611 } 612 goto success; 613 } 614 615 if (us.size == -1 && !o_stdout && v_level > 0) 616 warnx("%s: size of remote file is not known", URL); 617 if (v_level > 1) { 618 if (sb.st_size != -1) 619 fprintf(stderr, "local size / mtime: %jd / %ld\n", 620 (intmax_t)sb.st_size, (long)sb.st_mtime); 621 if (us.size != -1) 622 fprintf(stderr, "remote size / mtime: %jd / %ld\n", 623 (intmax_t)us.size, (long)us.mtime); 624 } 625 626 /* open output file */ 627 if (o_stdout) { 628 /* output to stdout */ 629 of = stdout; 630 } else if (r_flag && sb.st_size != -1) { 631 /* resume mode, local file exists */ 632 if (!F_flag && us.mtime && sb.st_mtime != us.mtime) { 633 /* no match! have to refetch */ 634 fclose(f); 635 /* if precious, warn the user and give up */ 636 if (R_flag) { 637 warnx("%s: local modification time " 638 "does not match remote", path); 639 goto failure_keep; 640 } 641 } else if (url->offset > sb.st_size) { 642 /* gap between what we asked for and what we got */ 643 warnx("%s: gap in resume mode", URL); 644 fclose(of); 645 of = NULL; 646 /* picked up again later */ 647 } else if (us.size != -1) { 648 if (us.size == sb.st_size) 649 /* nothing to do */ 650 goto success; 651 if (sb.st_size > us.size) { 652 /* local file too long! */ 653 warnx("%s: local file (%jd bytes) is longer " 654 "than remote file (%jd bytes)", path, 655 (intmax_t)sb.st_size, (intmax_t)us.size); 656 goto failure; 657 } 658 /* we got it, open local file */ 659 if ((of = fopen(path, "r+")) == NULL) { 660 warn("%s: fopen()", path); 661 goto failure; 662 } 663 /* check that it didn't move under our feet */ 664 if (fstat(fileno(of), &nsb) == -1) { 665 /* can't happen! */ 666 warn("%s: fstat()", path); 667 goto failure; 668 } 669 if (nsb.st_dev != sb.st_dev || 670 nsb.st_ino != sb.st_ino || 671 nsb.st_size != sb.st_size) { 672 warnx("%s: file has changed", URL); 673 fclose(of); 674 of = NULL; 675 sb = nsb; 676 /* picked up again later */ 677 } 678 } 679 /* seek to where we left off */ 680 if (of != NULL && fseeko(of, url->offset, SEEK_SET) != 0) { 681 warn("%s: fseeko()", path); 682 fclose(of); 683 of = NULL; 684 /* picked up again later */ 685 } 686 } else if (m_flag && sb.st_size != -1) { 687 /* mirror mode, local file exists */ 688 if (sb.st_size == us.size && sb.st_mtime == us.mtime) 689 goto success; 690 } 691 692 if (of == NULL) { 693 /* 694 * We don't yet have an output file; either this is a 695 * vanilla run with no special flags, or the local and 696 * remote files didn't match. 697 */ 698 699 if (url->offset > 0) { 700 /* 701 * We tried to restart a transfer, but for 702 * some reason gave up - so we have to restart 703 * from scratch if we want the whole file 704 */ 705 url->offset = 0; 706 if ((f = fetchXGet(url, &us, flags)) == NULL) { 707 warnx("%s: %s", URL, fetchLastErrString); 708 goto failure; 709 } 710 if (sigint) 711 goto signal; 712 } 713 714 /* construct a temp file name */ 715 if (sb.st_size != -1 && S_ISREG(sb.st_mode)) { 716 if ((slash = strrchr(path, '/')) == NULL) 717 slash = path; 718 else 719 ++slash; 720 asprintf(&tmppath, "%.*s.fetch.XXXXXX.%s", 721 (int)(slash - path), path, slash); 722 if (tmppath != NULL) { 723 if (mkstemps(tmppath, strlen(slash) + 1) == -1) { 724 warn("%s: mkstemps()", path); 725 goto failure; 726 } 727 of = fopen(tmppath, "w"); 728 chown(tmppath, sb.st_uid, sb.st_gid); 729 chmod(tmppath, sb.st_mode & ALLPERMS); 730 } 731 } 732 if (of == NULL) 733 of = fopen(path, "w"); 734 if (of == NULL) { 735 warn("%s: open()", path); 736 goto failure; 737 } 738 } 739 count = url->offset; 740 741 /* start the counter */ 742 stat_start(&xs, path, us.size, count); 743 744 sigalrm = siginfo = sigint = 0; 745 746 /* suck in the data */ 747 setvbuf(f, NULL, _IOFBF, B_size); 748 signal(SIGINFO, sig_handler); 749 while (!sigint) { 750 if (us.size != -1 && us.size - count < B_size && 751 us.size - count >= 0) 752 size = us.size - count; 753 else 754 size = B_size; 755 if (siginfo) { 756 stat_end(&xs); 757 siginfo = 0; 758 } 759 760 if (size == 0) 761 break; 762 763 if ((readcnt = fread(buf, 1, size, f)) < size) { 764 if (ferror(f) && errno == EINTR && !sigint) 765 clearerr(f); 766 else if (readcnt == 0) 767 break; 768 } 769 770 stat_update(&xs, count += readcnt); 771 for (ptr = buf; readcnt > 0; ptr += wr, readcnt -= wr) 772 if ((wr = fwrite(ptr, 1, readcnt, of)) < readcnt) { 773 if (ferror(of) && errno == EINTR && !sigint) 774 clearerr(of); 775 else 776 break; 777 } 778 if (readcnt != 0) 779 break; 780 } 781 if (!sigalrm) 782 sigalrm = ferror(f) && errno == ETIMEDOUT; 783 signal(SIGINFO, SIG_DFL); 784 785 stat_end(&xs); 786 787 /* 788 * If the transfer timed out or was interrupted, we still want to 789 * set the mtime in case the file is not removed (-r or -R) and 790 * the user later restarts the transfer. 791 */ 792 signal: 793 /* set mtime of local file */ 794 if (!n_flag && us.mtime && !o_stdout && of != NULL && 795 (stat(path, &sb) != -1) && sb.st_mode & S_IFREG) { 796 struct timeval tv[2]; 797 798 fflush(of); 799 tv[0].tv_sec = (long)(us.atime ? us.atime : us.mtime); 800 tv[1].tv_sec = (long)us.mtime; 801 tv[0].tv_usec = tv[1].tv_usec = 0; 802 if (utimes(tmppath ? tmppath : path, tv)) 803 warn("%s: utimes()", tmppath ? tmppath : path); 804 } 805 806 /* timed out or interrupted? */ 807 if (sigalrm) 808 warnx("transfer timed out"); 809 if (sigint) { 810 warnx("transfer interrupted"); 811 goto failure; 812 } 813 814 /* timeout / interrupt before connection completley established? */ 815 if (f == NULL) 816 goto failure; 817 818 if (!sigalrm) { 819 /* check the status of our files */ 820 if (ferror(f)) 821 warn("%s", URL); 822 if (ferror(of)) 823 warn("%s", path); 824 if (ferror(f) || ferror(of)) 825 goto failure; 826 } 827 828 /* did the transfer complete normally? */ 829 if (us.size != -1 && count < us.size) { 830 warnx("%s appears to be truncated: %jd/%jd bytes", 831 path, (intmax_t)count, (intmax_t)us.size); 832 goto failure_keep; 833 } 834 835 /* 836 * If the transfer timed out and we didn't know how much to 837 * expect, assume the worst (i.e. we didn't get all of it) 838 */ 839 if (sigalrm && us.size == -1) { 840 warnx("%s may be truncated", path); 841 goto failure_keep; 842 } 843 844 success: 845 r = 0; 846 if (tmppath != NULL && rename(tmppath, path) == -1) { 847 warn("%s: rename()", path); 848 goto failure_keep; 849 } 850 goto done; 851 failure: 852 if (of && of != stdout && !R_flag && !r_flag) 853 if (stat(path, &sb) != -1 && (sb.st_mode & S_IFREG)) 854 unlink(tmppath ? tmppath : path); 855 if (R_flag && tmppath != NULL && sb.st_size == -1) 856 rename(tmppath, path); /* ignore errors here */ 857 failure_keep: 858 r = -1; 859 goto done; 860 done: 861 if (f) 862 fclose(f); 863 if (of && of != stdout) 864 fclose(of); 865 if (url) 866 fetchFreeURL(url); 867 if (tmppath != NULL) 868 free(tmppath); 869 return (r); 870 } 871 872 static void 873 usage(void) 874 { 875 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", 876 "usage: fetch [-146AadFlMmnPpqRrsUv] [-B bytes] [--bind-address=host]", 877 " [--ca-cert=file] [--ca-path=dir] [--cert=file] [--crl=file]", 878 " [-i file] [--key=file] [-N file] [--no-passive] [--no-proxy=list]", 879 " [--no-sslv3] [--no-tlsv1] [--no-verify-hostname] [--no-verify-peer]", 880 " [-o file] [--referer=URL] [-S bytes] [-T seconds]", 881 " [--user-agent=agent-string] [-w seconds] URL ...", 882 " fetch [-146AadFlMmnPpqRrsUv] [-B bytes] [--bind-address=host]", 883 " [--ca-cert=file] [--ca-path=dir] [--cert=file] [--crl=file]", 884 " [-i file] [--key=file] [-N file] [--no-passive] [--no-proxy=list]", 885 " [--no-sslv3] [--no-tlsv1] [--no-verify-hostname] [--no-verify-peer]", 886 " [-o file] [--referer=URL] [-S bytes] [-T seconds]", 887 " [--user-agent=agent-string] [-w seconds] -h host -f file [-c dir]"); 888 } 889 890 891 /* 892 * Entry point 893 */ 894 int 895 main(int argc, char *argv[]) 896 { 897 struct stat sb; 898 struct sigaction sa; 899 const char *p, *s; 900 char *end, *q; 901 int c, e, r; 902 903 904 while ((c = getopt_long(argc, argv, 905 "146AaB:bc:dFf:Hh:i:lMmN:nPpo:qRrS:sT:tUvw:", 906 longopts, NULL)) != -1) 907 switch (c) { 908 case '1': 909 once_flag = 1; 910 break; 911 case '4': 912 family = PF_INET; 913 break; 914 case '6': 915 family = PF_INET6; 916 break; 917 case 'A': 918 A_flag = 1; 919 break; 920 case 'a': 921 a_flag = 1; 922 break; 923 case 'B': 924 B_size = (off_t)strtol(optarg, &end, 10); 925 if (*optarg == '\0' || *end != '\0') 926 errx(1, "invalid buffer size (%s)", optarg); 927 break; 928 case 'b': 929 warnx("warning: the -b option is deprecated"); 930 b_flag = 1; 931 break; 932 case 'c': 933 c_dirname = optarg; 934 break; 935 case 'd': 936 d_flag = 1; 937 break; 938 case 'F': 939 F_flag = 1; 940 break; 941 case 'f': 942 f_filename = optarg; 943 break; 944 case 'H': 945 warnx("the -H option is now implicit, " 946 "use -U to disable"); 947 break; 948 case 'h': 949 h_hostname = optarg; 950 break; 951 case 'i': 952 i_flag = 1; 953 i_filename = optarg; 954 break; 955 case 'l': 956 l_flag = 1; 957 break; 958 case 'o': 959 o_flag = 1; 960 o_filename = optarg; 961 break; 962 case 'M': 963 case 'm': 964 if (r_flag) 965 errx(1, "the -m and -r flags " 966 "are mutually exclusive"); 967 m_flag = 1; 968 break; 969 case 'N': 970 N_filename = optarg; 971 break; 972 case 'n': 973 n_flag = 1; 974 break; 975 case 'P': 976 case 'p': 977 p_flag = 1; 978 break; 979 case 'q': 980 v_level = 0; 981 break; 982 case 'R': 983 R_flag = 1; 984 break; 985 case 'r': 986 if (m_flag) 987 errx(1, "the -m and -r flags " 988 "are mutually exclusive"); 989 r_flag = 1; 990 break; 991 case 'S': 992 S_size = (off_t)strtol(optarg, &end, 10); 993 if (*optarg == '\0' || *end != '\0') 994 errx(1, "invalid size (%s)", optarg); 995 break; 996 case 's': 997 s_flag = 1; 998 break; 999 case 'T': 1000 T_secs = strtol(optarg, &end, 10); 1001 if (*optarg == '\0' || *end != '\0') 1002 errx(1, "invalid timeout (%s)", optarg); 1003 break; 1004 case 't': 1005 t_flag = 1; 1006 warnx("warning: the -t option is deprecated"); 1007 break; 1008 case 'U': 1009 U_flag = 1; 1010 break; 1011 case 'v': 1012 v_level++; 1013 break; 1014 case 'w': 1015 a_flag = 1; 1016 w_secs = strtol(optarg, &end, 10); 1017 if (*optarg == '\0' || *end != '\0') 1018 errx(1, "invalid delay (%s)", optarg); 1019 break; 1020 case OPTION_BIND_ADDRESS: 1021 setenv("FETCH_BIND_ADDRESS", optarg, 1); 1022 break; 1023 case OPTION_NO_FTP_PASSIVE_MODE: 1024 setenv("FTP_PASSIVE_MODE", "no", 1); 1025 break; 1026 case OPTION_HTTP_REFERER: 1027 setenv("HTTP_REFERER", optarg, 1); 1028 break; 1029 case OPTION_HTTP_USER_AGENT: 1030 setenv("HTTP_USER_AGENT", optarg, 1); 1031 break; 1032 case OPTION_NO_PROXY: 1033 setenv("NO_PROXY", optarg, 1); 1034 break; 1035 case OPTION_SSL_CA_CERT_FILE: 1036 setenv("SSL_CA_CERT_FILE", optarg, 1); 1037 break; 1038 case OPTION_SSL_CA_CERT_PATH: 1039 setenv("SSL_CA_CERT_PATH", optarg, 1); 1040 break; 1041 case OPTION_SSL_CLIENT_CERT_FILE: 1042 setenv("SSL_CLIENT_CERT_FILE", optarg, 1); 1043 break; 1044 case OPTION_SSL_CLIENT_KEY_FILE: 1045 setenv("SSL_CLIENT_KEY_FILE", optarg, 1); 1046 break; 1047 case OPTION_SSL_CRL_FILE: 1048 setenv("SSL_CLIENT_CRL_FILE", optarg, 1); 1049 break; 1050 case OPTION_SSL_NO_SSL3: 1051 setenv("SSL_NO_SSL3", "", 1); 1052 break; 1053 case OPTION_SSL_NO_TLS1: 1054 setenv("SSL_NO_TLS1", "", 1); 1055 break; 1056 case OPTION_SSL_NO_VERIFY_HOSTNAME: 1057 setenv("SSL_NO_VERIFY_HOSTNAME", "", 1); 1058 break; 1059 case OPTION_SSL_NO_VERIFY_PEER: 1060 setenv("SSL_NO_VERIFY_PEER", "", 1); 1061 break; 1062 default: 1063 usage(); 1064 exit(1); 1065 } 1066 1067 argc -= optind; 1068 argv += optind; 1069 1070 if (h_hostname || f_filename || c_dirname) { 1071 if (!h_hostname || !f_filename || argc) { 1072 usage(); 1073 exit(1); 1074 } 1075 /* XXX this is a hack. */ 1076 if (strcspn(h_hostname, "@:/") != strlen(h_hostname)) 1077 errx(1, "invalid hostname"); 1078 if (asprintf(argv, "ftp://%s/%s/%s", h_hostname, 1079 c_dirname ? c_dirname : "", f_filename) == -1) 1080 errx(1, "%s", strerror(ENOMEM)); 1081 argc++; 1082 } 1083 1084 if (!argc) { 1085 usage(); 1086 exit(1); 1087 } 1088 1089 /* allocate buffer */ 1090 if (B_size < MINBUFSIZE) 1091 B_size = MINBUFSIZE; 1092 if ((buf = malloc(B_size)) == NULL) 1093 errx(1, "%s", strerror(ENOMEM)); 1094 1095 /* timeouts */ 1096 if ((s = getenv("FTP_TIMEOUT")) != NULL) { 1097 ftp_timeout = strtol(s, &end, 10); 1098 if (*s == '\0' || *end != '\0' || ftp_timeout < 0) { 1099 warnx("FTP_TIMEOUT (%s) is not a positive integer", s); 1100 ftp_timeout = 0; 1101 } 1102 } 1103 if ((s = getenv("HTTP_TIMEOUT")) != NULL) { 1104 http_timeout = strtol(s, &end, 10); 1105 if (*s == '\0' || *end != '\0' || http_timeout < 0) { 1106 warnx("HTTP_TIMEOUT (%s) is not a positive integer", s); 1107 http_timeout = 0; 1108 } 1109 } 1110 1111 /* signal handling */ 1112 sa.sa_flags = 0; 1113 sa.sa_handler = sig_handler; 1114 sigemptyset(&sa.sa_mask); 1115 sigaction(SIGALRM, &sa, NULL); 1116 sa.sa_flags = SA_RESETHAND; 1117 sigaction(SIGINT, &sa, NULL); 1118 fetchRestartCalls = 0; 1119 1120 /* output file */ 1121 if (o_flag) { 1122 if (strcmp(o_filename, "-") == 0) { 1123 o_stdout = 1; 1124 } else if (stat(o_filename, &sb) == -1) { 1125 if (errno == ENOENT) { 1126 if (argc > 1) 1127 errx(1, "%s is not a directory", 1128 o_filename); 1129 } else { 1130 err(1, "%s", o_filename); 1131 } 1132 } else { 1133 if (sb.st_mode & S_IFDIR) 1134 o_directory = 1; 1135 } 1136 } 1137 1138 /* check if output is to a tty (for progress report) */ 1139 v_tty = isatty(STDERR_FILENO); 1140 v_progress = v_tty && v_level > 0; 1141 if (v_progress) 1142 pgrp = getpgrp(); 1143 1144 r = 0; 1145 1146 /* authentication */ 1147 if (v_tty) 1148 fetchAuthMethod = query_auth; 1149 if (N_filename != NULL) 1150 if (setenv("NETRC", N_filename, 1) == -1) 1151 err(1, "setenv: cannot set NETRC=%s", N_filename); 1152 1153 while (argc) { 1154 if ((p = strrchr(*argv, '/')) == NULL) 1155 p = *argv; 1156 else 1157 p++; 1158 1159 if (!*p) 1160 p = "fetch.out"; 1161 1162 fetchLastErrCode = 0; 1163 1164 if (o_flag) { 1165 if (o_stdout) { 1166 e = fetch(*argv, "-"); 1167 } else if (o_directory) { 1168 asprintf(&q, "%s/%s", o_filename, p); 1169 e = fetch(*argv, q); 1170 free(q); 1171 } else { 1172 e = fetch(*argv, o_filename); 1173 } 1174 } else { 1175 e = fetch(*argv, p); 1176 } 1177 1178 if (sigint) 1179 kill(getpid(), SIGINT); 1180 1181 if (e == 0 && once_flag) 1182 exit(0); 1183 1184 if (e) { 1185 r = 1; 1186 if ((fetchLastErrCode 1187 && fetchLastErrCode != FETCH_UNAVAIL 1188 && fetchLastErrCode != FETCH_MOVED 1189 && fetchLastErrCode != FETCH_URL 1190 && fetchLastErrCode != FETCH_RESOLV 1191 && fetchLastErrCode != FETCH_UNKNOWN)) { 1192 if (w_secs && v_level) 1193 fprintf(stderr, "Waiting %ld seconds " 1194 "before retrying\n", w_secs); 1195 if (w_secs) 1196 sleep(w_secs); 1197 if (a_flag) 1198 continue; 1199 } 1200 } 1201 1202 argc--, argv++; 1203 } 1204 1205 exit(r); 1206 } 1207