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/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 <getopt.h> 41 #include <signal.h> 42 #include <stdint.h> 43 #include <stdio.h> 44 #include <stdlib.h> 45 #include <string.h> 46 #include <termios.h> 47 #include <unistd.h> 48 49 #include <fetch.h> 50 51 #define MINBUFSIZE 16384 52 #define TIMEOUT 120 53 54 /* Option flags */ 55 static int A_flag; /* -A: do not follow 302 redirects */ 56 static int a_flag; /* -a: auto retry */ 57 static off_t B_size; /* -B: buffer size */ 58 static int b_flag; /*! -b: workaround TCP bug */ 59 static char *c_dirname; /* -c: remote directory */ 60 static int d_flag; /* -d: direct connection */ 61 static int F_flag; /* -F: restart without checking mtime */ 62 static char *f_filename; /* -f: file to fetch */ 63 static char *h_hostname; /* -h: host to fetch from */ 64 static int i_flag; /* -i: specify file for mtime comparison */ 65 static char *i_filename; /* name of input file */ 66 static int l_flag; /* -l: link rather than copy file: URLs */ 67 static int m_flag; /* -[Mm]: mirror mode */ 68 static char *N_filename; /* -N: netrc file name */ 69 static int n_flag; /* -n: do not preserve modification time */ 70 static int o_flag; /* -o: specify output file */ 71 static int o_directory; /* output file is a directory */ 72 static char *o_filename; /* name of output file */ 73 static int o_stdout; /* output file is stdout */ 74 static int once_flag; /* -1: stop at first successful file */ 75 static int p_flag; /* -[Pp]: use passive FTP */ 76 static int R_flag; /* -R: don't delete partial files */ 77 static int r_flag; /* -r: restart previous transfer */ 78 static off_t S_size; /* -S: require size to match */ 79 static int s_flag; /* -s: show size, don't fetch */ 80 static long T_secs; /* -T: transfer timeout in seconds */ 81 static int t_flag; /*! -t: workaround TCP bug */ 82 static int U_flag; /* -U: do not use high ports */ 83 static int v_level = 1; /* -v: verbosity level */ 84 static int v_tty; /* stdout is a tty */ 85 static int v_progress; /* whether to display progress */ 86 static pid_t pgrp; /* our process group */ 87 static long w_secs; /* -w: retry delay */ 88 static int family = PF_UNSPEC; /* -[46]: address family to use */ 89 90 static int siginfo; /* SIGINFO received */ 91 static int sigint; /* SIGINT received */ 92 93 static long ftp_timeout = TIMEOUT; /* default timeout for FTP transfers */ 94 static long http_timeout = TIMEOUT;/* default timeout for HTTP transfers */ 95 static char *buf; /* transfer buffer */ 96 97 enum options 98 { 99 OPTION_BIND_ADDRESS, 100 OPTION_NO_FTP_PASSIVE_MODE, 101 OPTION_HTTP_REFERER, 102 OPTION_HTTP_USER_AGENT, 103 OPTION_NO_PROXY, 104 OPTION_SSL_CA_CERT_FILE, 105 OPTION_SSL_CA_CERT_PATH, 106 OPTION_SSL_CLIENT_CERT_FILE, 107 OPTION_SSL_CLIENT_KEY_FILE, 108 OPTION_SSL_CRL_FILE, 109 OPTION_SSL_NO_SSL3, 110 OPTION_SSL_NO_TLS1, 111 OPTION_SSL_NO_VERIFY_HOSTNAME, 112 OPTION_SSL_NO_VERIFY_PEER 113 }; 114 115 116 static struct option longopts[] = 117 { 118 /* mapping to single character argument */ 119 { "one-file", no_argument, NULL, '1' }, 120 { "ipv4-only", no_argument, NULL, '4' }, 121 { "ipv6-only", no_argument, NULL, '6' }, 122 { "no-redirect", no_argument, NULL, 'A' }, 123 { "retry", no_argument, NULL, 'a' }, 124 { "buffer-size", required_argument, NULL, 'B' }, 125 /* -c not mapped, since it's deprecated */ 126 { "direct", no_argument, NULL, 'd' }, 127 { "force-restart", no_argument, NULL, 'F' }, 128 /* -f not mapped, since it's deprecated */ 129 /* -h not mapped, since it's deprecated */ 130 { "if-modified-since", required_argument, NULL, 'i' }, 131 { "symlink", no_argument, NULL, 'l' }, 132 /* -M not mapped since it's the same as -m */ 133 { "mirror", no_argument, NULL, 'm' }, 134 { "netrc", required_argument, NULL, 'N' }, 135 { "no-mtime", no_argument, NULL, 'n' }, 136 { "output", required_argument, NULL, 'o' }, 137 /* -P not mapped since it's the same as -p */ 138 { "passive", no_argument, NULL, 'p' }, 139 { "quiet", no_argument, NULL, 'q' }, 140 { "keep-output", no_argument, NULL, 'R' }, 141 { "restart", no_argument, NULL, 'r' }, 142 { "require-size", required_argument, NULL, 'S' }, 143 { "print-size", no_argument, NULL, 's' }, 144 { "timeout", required_argument, NULL, 'T' }, 145 { "passive-portrange-default", no_argument, NULL, 'T' }, 146 { "verbose", no_argument, NULL, 'v' }, 147 { "retry-delay", required_argument, NULL, 'w' }, 148 149 /* options without a single character equivalent */ 150 { "bind-address", required_argument, NULL, OPTION_BIND_ADDRESS }, 151 { "no-passive", no_argument, NULL, OPTION_NO_FTP_PASSIVE_MODE }, 152 { "referer", required_argument, NULL, OPTION_HTTP_REFERER }, 153 { "user-agent", required_argument, NULL, OPTION_HTTP_USER_AGENT }, 154 { "no-proxy", required_argument, NULL, OPTION_NO_PROXY }, 155 { "ca-cert", required_argument, NULL, OPTION_SSL_CA_CERT_FILE }, 156 { "ca-path", required_argument, NULL, OPTION_SSL_CA_CERT_PATH }, 157 { "cert", required_argument, NULL, OPTION_SSL_CLIENT_CERT_FILE }, 158 { "key", required_argument, NULL, OPTION_SSL_CLIENT_KEY_FILE }, 159 { "crl", required_argument, NULL, OPTION_SSL_CRL_FILE }, 160 { "no-sslv3", no_argument, NULL, OPTION_SSL_NO_SSL3 }, 161 { "no-tlsv1", no_argument, NULL, OPTION_SSL_NO_TLS1 }, 162 { "no-verify-hostname", no_argument, NULL, OPTION_SSL_NO_VERIFY_HOSTNAME }, 163 { "no-verify-peer", no_argument, NULL, OPTION_SSL_NO_VERIFY_PEER }, 164 165 { NULL, 0, NULL, 0 } 166 }; 167 168 /* 169 * Signal handler 170 */ 171 static void 172 sig_handler(int sig) 173 { 174 switch (sig) { 175 case SIGINFO: 176 siginfo = 1; 177 break; 178 case SIGINT: 179 sigint = 1; 180 break; 181 } 182 } 183 184 struct xferstat { 185 char name[64]; 186 struct timeval start; /* start of transfer */ 187 struct timeval last; /* time of last update */ 188 struct timeval last2; /* time of previous last update */ 189 off_t size; /* size of file per HTTP hdr */ 190 off_t offset; /* starting offset in file */ 191 off_t rcvd; /* bytes already received */ 192 off_t lastrcvd; /* bytes received since last update */ 193 }; 194 195 /* 196 * Format a number of seconds as either XXdYYh, XXhYYm, XXmYYs, or XXs 197 * depending on its magnitude 198 */ 199 static void 200 stat_seconds(char *str, size_t strsz, long seconds) 201 { 202 203 if (seconds > 86400) 204 snprintf(str, strsz, "%02ldd%02ldh", 205 seconds / 86400, (seconds % 86400) / 3600); 206 else if (seconds > 3600) 207 snprintf(str, strsz, "%02ldh%02ldm", 208 seconds / 3600, (seconds % 3600) / 60); 209 else if (seconds > 60) 210 snprintf(str, strsz, "%02ldm%02lds", 211 seconds / 60, seconds % 60); 212 else 213 snprintf(str, strsz, " %02lds", 214 seconds); 215 } 216 217 /* 218 * Compute and display ETA 219 */ 220 static void 221 stat_eta(char *str, size_t strsz, const struct xferstat *xs) 222 { 223 long elapsed, eta; 224 off_t received, expected; 225 226 elapsed = xs->last.tv_sec - xs->start.tv_sec; 227 received = xs->rcvd - xs->offset; 228 expected = xs->size - xs->rcvd; 229 eta = (long)((double)elapsed * expected / received); 230 if (eta > 0) 231 stat_seconds(str, strsz, eta); 232 else 233 stat_seconds(str, strsz, elapsed); 234 } 235 236 /* 237 * Format a number as "xxxx YB" where Y is ' ', 'k', 'M'... 238 */ 239 static const char *prefixes = " kMGTP"; 240 static void 241 stat_bytes(char *str, size_t strsz, off_t bytes) 242 { 243 const char *prefix = prefixes; 244 245 while (bytes > 9999 && prefix[1] != '\0') { 246 bytes /= 1024; 247 prefix++; 248 } 249 snprintf(str, strsz, "%4ju %cB", (uintmax_t)bytes, *prefix); 250 } 251 252 /* 253 * Compute and display transfer rate 254 */ 255 static void 256 stat_bps(char *str, size_t strsz, struct xferstat *xs) 257 { 258 char bytes[16]; 259 double delta, bps; 260 261 delta = ((double)xs->last.tv_sec + (xs->last.tv_usec / 1.e6)) 262 - ((double)xs->last2.tv_sec + (xs->last2.tv_usec / 1.e6)); 263 264 if (delta == 0.0) { 265 snprintf(str, strsz, "?? Bps"); 266 } else { 267 bps = (xs->rcvd - xs->lastrcvd) / delta; 268 stat_bytes(bytes, sizeof bytes, (off_t)bps); 269 snprintf(str, strsz, "%sps", bytes); 270 } 271 } 272 273 /* 274 * Update the stats display 275 */ 276 static void 277 stat_display(struct xferstat *xs, int force) 278 { 279 char bytes[16], bps[16], eta[16]; 280 struct timeval now; 281 int ctty_pgrp; 282 283 /* check if we're the foreground process */ 284 if (ioctl(STDERR_FILENO, TIOCGPGRP, &ctty_pgrp) != 0 || 285 (pid_t)ctty_pgrp != pgrp) 286 return; 287 288 gettimeofday(&now, NULL); 289 if (!force && now.tv_sec <= xs->last.tv_sec) 290 return; 291 xs->last2 = xs->last; 292 xs->last = now; 293 294 fprintf(stderr, "\r%-46.46s", xs->name); 295 if (xs->rcvd >= xs->size) { 296 stat_bytes(bytes, sizeof bytes, xs->rcvd); 297 setproctitle("%s [%s]", xs->name, bytes); 298 fprintf(stderr, " %s", bytes); 299 } else { 300 stat_bytes(bytes, sizeof bytes, xs->size); 301 setproctitle("%s [%d%% of %s]", xs->name, 302 (int)((100.0 * xs->rcvd) / xs->size), 303 bytes); 304 fprintf(stderr, "%3d%% of %s", 305 (int)((100.0 * xs->rcvd) / xs->size), 306 bytes); 307 } 308 if (force == 2) { 309 xs->lastrcvd = xs->offset; 310 xs->last2 = xs->start; 311 } 312 stat_bps(bps, sizeof bps, xs); 313 fprintf(stderr, " %s", bps); 314 if ((xs->size > 0 && xs->rcvd > 0 && 315 xs->last.tv_sec >= xs->start.tv_sec + 3) || 316 force == 2) { 317 stat_eta(eta, sizeof eta, xs); 318 fprintf(stderr, " %s", eta); 319 } 320 xs->lastrcvd = xs->rcvd; 321 } 322 323 /* 324 * Initialize the transfer statistics 325 */ 326 static void 327 stat_start(struct xferstat *xs, const char *name, off_t size, off_t offset) 328 { 329 330 memset(xs, 0, sizeof *xs); 331 snprintf(xs->name, sizeof xs->name, "%s", name); 332 gettimeofday(&xs->start, NULL); 333 xs->last2 = xs->last = xs->start; 334 xs->size = size; 335 xs->offset = offset; 336 xs->rcvd = offset; 337 xs->lastrcvd = offset; 338 if (v_progress) 339 stat_display(xs, 1); 340 else if (v_level > 0) 341 fprintf(stderr, "%-46s", xs->name); 342 } 343 344 /* 345 * Update the transfer statistics 346 */ 347 static void 348 stat_update(struct xferstat *xs, off_t rcvd) 349 { 350 351 xs->rcvd = rcvd; 352 if (v_progress) 353 stat_display(xs, 0); 354 } 355 356 /* 357 * Finalize the transfer statistics 358 */ 359 static void 360 stat_end(struct xferstat *xs) 361 { 362 char bytes[16], bps[16], eta[16]; 363 364 gettimeofday(&xs->last, NULL); 365 if (v_progress) { 366 stat_display(xs, 2); 367 putc('\n', stderr); 368 } else if (v_level > 0) { 369 stat_bytes(bytes, sizeof bytes, xs->rcvd); 370 stat_bps(bps, sizeof bps, xs); 371 stat_eta(eta, sizeof eta, xs); 372 fprintf(stderr, " %s %s %s\n", bytes, bps, eta); 373 } 374 } 375 376 /* 377 * Ask the user for authentication details 378 */ 379 static int 380 query_auth(struct url *URL) 381 { 382 struct termios tios; 383 tcflag_t saved_flags; 384 int i, nopwd; 385 386 fprintf(stderr, "Authentication required for <%s://%s:%d/>!\n", 387 URL->scheme, URL->host, URL->port); 388 389 fprintf(stderr, "Login: "); 390 if (fgets(URL->user, sizeof URL->user, stdin) == NULL) 391 return (-1); 392 for (i = strlen(URL->user); i >= 0; --i) 393 if (URL->user[i] == '\r' || URL->user[i] == '\n') 394 URL->user[i] = '\0'; 395 396 fprintf(stderr, "Password: "); 397 if (tcgetattr(STDIN_FILENO, &tios) == 0) { 398 saved_flags = tios.c_lflag; 399 tios.c_lflag &= ~ECHO; 400 tios.c_lflag |= ECHONL|ICANON; 401 tcsetattr(STDIN_FILENO, TCSAFLUSH|TCSASOFT, &tios); 402 nopwd = (fgets(URL->pwd, sizeof URL->pwd, stdin) == NULL); 403 tios.c_lflag = saved_flags; 404 tcsetattr(STDIN_FILENO, TCSANOW|TCSASOFT, &tios); 405 } else { 406 nopwd = (fgets(URL->pwd, sizeof URL->pwd, stdin) == NULL); 407 } 408 if (nopwd) 409 return (-1); 410 for (i = strlen(URL->pwd); i >= 0; --i) 411 if (URL->pwd[i] == '\r' || URL->pwd[i] == '\n') 412 URL->pwd[i] = '\0'; 413 414 return (0); 415 } 416 417 /* 418 * Fetch a file 419 */ 420 static int 421 fetch(char *URL, const char *path, int *is_http) 422 { 423 struct url *url; 424 struct url_stat us; 425 struct stat sb, nsb; 426 struct xferstat xs; 427 FILE *f, *of; 428 size_t size, readcnt, wr; 429 off_t count, size_prev; 430 char flags[8]; 431 const char *slash; 432 char *tmppath; 433 int r, tries; 434 unsigned timeout; 435 int timedout = 0; 436 char *ptr; 437 438 f = of = NULL; 439 tmppath = NULL; 440 441 timeout = 0; 442 *flags = 0; 443 count = 0; 444 445 /* set verbosity level */ 446 if (v_level > 1) 447 strcat(flags, "v"); 448 if (v_level > 2) 449 fetchDebug = 1; 450 451 /* parse URL */ 452 url = NULL; 453 if (*URL == '\0') { 454 warnx("empty URL"); 455 goto failure; 456 } 457 if ((url = fetchParseURL(URL)) == NULL) { 458 warnx("%s: parse error", URL); 459 goto failure; 460 } 461 462 /* if no scheme was specified, take a guess */ 463 if (!*url->scheme) { 464 if (!*url->host) 465 strcpy(url->scheme, SCHEME_FILE); 466 else if (strncasecmp(url->host, "ftp.", 4) == 0) 467 strcpy(url->scheme, SCHEME_FTP); 468 else if (strncasecmp(url->host, "www.", 4) == 0) 469 strcpy(url->scheme, SCHEME_HTTP); 470 } 471 472 /* for both of http and https */ 473 *is_http = strncmp(url->scheme, "http", 4) == 0; 474 475 /* common flags */ 476 switch (family) { 477 case PF_INET: 478 strcat(flags, "4"); 479 break; 480 case PF_INET6: 481 strcat(flags, "6"); 482 break; 483 } 484 485 /* FTP specific flags */ 486 if (strcmp(url->scheme, SCHEME_FTP) == 0) { 487 if (p_flag) 488 strcat(flags, "p"); 489 if (d_flag) 490 strcat(flags, "d"); 491 if (U_flag) 492 strcat(flags, "l"); 493 timeout = T_secs ? T_secs : ftp_timeout; 494 } 495 496 /* HTTP specific flags */ 497 if (strcmp(url->scheme, SCHEME_HTTP) == 0 || 498 strcmp(url->scheme, SCHEME_HTTPS) == 0) { 499 if (d_flag) 500 strcat(flags, "d"); 501 if (A_flag) 502 strcat(flags, "A"); 503 timeout = T_secs ? T_secs : http_timeout; 504 if (i_flag) { 505 if (stat(i_filename, &sb)) { 506 warn("%s: stat()", i_filename); 507 goto failure; 508 } 509 url->ims_time = sb.st_mtime; 510 strcat(flags, "i"); 511 } 512 } 513 514 /* set the protocol timeout. */ 515 fetchTimeout = timeout; 516 517 /* just print size */ 518 if (s_flag) { 519 r = fetchStat(url, &us, flags); 520 if (r == -1) { 521 warnx("%s", fetchLastErrString); 522 goto failure; 523 } 524 if (us.size == -1) 525 printf("Unknown\n"); 526 else 527 printf("%jd\n", (intmax_t)us.size); 528 goto success; 529 } 530 531 tries = 1; 532 again: 533 r = 0; 534 /* 535 * If the -r flag was specified, we have to compare the local 536 * and remote files, so we should really do a fetchStat() 537 * first, but I know of at least one HTTP server that only 538 * sends the content size in response to GET requests, and 539 * leaves it out of replies to HEAD requests. Also, in the 540 * (frequent) case that the local and remote files match but 541 * the local file is truncated, we have sufficient information 542 * before the compare to issue a correct request. Therefore, 543 * we always issue a GET request as if we were sure the local 544 * file was a truncated copy of the remote file; we can drop 545 * the connection later if we change our minds. 546 */ 547 sb.st_size = -1; 548 if (!o_stdout) { 549 r = stat(path, &sb); 550 if (r == 0 && (r_flag || tries > 1) && S_ISREG(sb.st_mode)) { 551 url->offset = sb.st_size; 552 } else if (r == -1 || !S_ISREG(sb.st_mode)) { 553 /* 554 * Whatever value sb.st_size has now is either 555 * wrong (if stat(2) failed) or irrelevant (if the 556 * path does not refer to a regular file) 557 */ 558 sb.st_size = -1; 559 } 560 if (r == -1 && errno != ENOENT) { 561 warnx("%s: stat()", path); 562 goto failure; 563 } 564 } 565 size_prev = sb.st_size; 566 567 /* start the transfer */ 568 f = fetchXGet(url, &us, flags); 569 if (f == NULL) { 570 if (i_flag && *is_http && fetchLastErrCode == FETCH_OK && 571 strcmp(fetchLastErrString, "Not Modified") == 0) { 572 /* HTTP Not Modified Response, return OK. */ 573 if (v_level > 0) 574 warnx("%s: %s", URL, fetchLastErrString); 575 r = 0; 576 goto done; 577 } else { 578 warnx("%s: %s", URL, fetchLastErrString); 579 goto failure; 580 } 581 } 582 if (sigint) 583 goto signal; 584 585 /* check that size is as expected */ 586 if (S_size) { 587 if (us.size == -1) { 588 warnx("%s: size unknown", URL); 589 } else if (us.size != S_size) { 590 warnx("%s: size mismatch: expected %jd, actual %jd", 591 URL, (intmax_t)S_size, (intmax_t)us.size); 592 goto failure; 593 } 594 } 595 596 /* symlink instead of copy */ 597 if (l_flag && strcmp(url->scheme, "file") == 0 && !o_stdout) { 598 if (symlink(url->doc, path) == -1) { 599 warn("%s: symlink()", path); 600 goto failure; 601 } 602 goto success; 603 } 604 605 if (us.size == -1 && !o_stdout && v_level > 0) 606 warnx("%s: size of remote file is not known", URL); 607 if (v_level > 1) { 608 if (sb.st_size != -1) 609 fprintf(stderr, "local size / mtime: %jd / %ld\n", 610 (intmax_t)sb.st_size, (long)sb.st_mtime); 611 if (us.size != -1) 612 fprintf(stderr, "remote size / mtime: %jd / %ld\n", 613 (intmax_t)us.size, (long)us.mtime); 614 } 615 616 /* open output file */ 617 if (o_stdout) { 618 /* output to stdout */ 619 of = stdout; 620 } else if (r_flag && sb.st_size != -1) { 621 /* resume mode, local file exists */ 622 if (!F_flag && us.mtime && sb.st_mtime != us.mtime && tries == 1) { 623 /* no match! have to refetch */ 624 fclose(f); 625 /* if precious, warn the user and give up */ 626 if (R_flag) { 627 warnx("%s: local modification time " 628 "does not match remote", path); 629 goto failure_keep; 630 } 631 } else if (url->offset > sb.st_size) { 632 /* gap between what we asked for and what we got */ 633 warnx("%s: gap in resume mode", URL); 634 fclose(of); 635 of = NULL; 636 /* picked up again later */ 637 } else if (us.size != -1) { 638 if (us.size == sb.st_size) 639 /* nothing to do */ 640 goto success; 641 if (sb.st_size > us.size) { 642 /* local file too long! */ 643 warnx("%s: local file (%jd bytes) is longer " 644 "than remote file (%jd bytes)", path, 645 (intmax_t)sb.st_size, (intmax_t)us.size); 646 goto failure; 647 } 648 /* we got it, open local file */ 649 if ((of = fopen(path, "r+")) == NULL) { 650 warn("%s: fopen()", path); 651 goto failure; 652 } 653 /* check that it didn't move under our feet */ 654 if (fstat(fileno(of), &nsb) == -1) { 655 /* can't happen! */ 656 warn("%s: fstat()", path); 657 goto failure; 658 } 659 if (nsb.st_dev != sb.st_dev || 660 nsb.st_ino != sb.st_ino || 661 nsb.st_size != sb.st_size) { 662 warnx("%s: file has changed", URL); 663 fclose(of); 664 of = NULL; 665 sb = nsb; 666 /* picked up again later */ 667 } 668 } 669 /* seek to where we left off */ 670 if (of != NULL && fseeko(of, url->offset, SEEK_SET) != 0) { 671 warn("%s: fseeko()", path); 672 fclose(of); 673 of = NULL; 674 /* picked up again later */ 675 } 676 } else if (m_flag && sb.st_size != -1) { 677 /* mirror mode, local file exists */ 678 if (sb.st_size == us.size && sb.st_mtime == us.mtime) 679 goto success; 680 } 681 682 if (of == NULL) { 683 /* 684 * We don't yet have an output file; either this is a 685 * vanilla run with no special flags, or the local and 686 * remote files didn't match. 687 */ 688 689 if (url->offset > 0) { 690 /* 691 * We tried to restart a transfer, but for 692 * some reason gave up - so we have to restart 693 * from scratch if we want the whole file 694 */ 695 url->offset = 0; 696 if ((f = fetchXGet(url, &us, flags)) == NULL) { 697 warnx("%s: %s", URL, fetchLastErrString); 698 goto failure; 699 } 700 if (sigint) 701 goto signal; 702 } 703 704 /* construct a temp file name */ 705 if (sb.st_size != -1 && S_ISREG(sb.st_mode)) { 706 if ((slash = strrchr(path, '/')) == NULL) 707 slash = path; 708 else 709 ++slash; 710 if(tmppath != NULL) 711 free(tmppath); 712 asprintf(&tmppath, "%.*s.fetch.XXXXXX.%s", 713 (int)(slash - path), path, slash); 714 if (tmppath != NULL) { 715 if (mkstemps(tmppath, strlen(slash) + 1) == -1) { 716 warn("%s: mkstemps()", path); 717 goto failure; 718 } 719 of = fopen(tmppath, "w"); 720 chown(tmppath, sb.st_uid, sb.st_gid); 721 chmod(tmppath, sb.st_mode & ALLPERMS); 722 } 723 } 724 if (of == NULL) 725 of = fopen(path, "w"); 726 if (of == NULL) { 727 warn("%s: open()", path); 728 goto failure; 729 } 730 } 731 count = url->offset; 732 733 /* start the counter */ 734 stat_start(&xs, path, us.size, count); 735 736 siginfo = sigint = 0; 737 738 /* suck in the data */ 739 setvbuf(f, NULL, _IOFBF, B_size); 740 signal(SIGINFO, sig_handler); 741 while (!sigint) { 742 if (us.size != -1 && us.size - count < B_size && 743 us.size - count >= 0) 744 size = us.size - count; 745 else 746 size = B_size; 747 if (siginfo) { 748 stat_end(&xs); 749 siginfo = 0; 750 } 751 752 if (size == 0) 753 break; 754 755 if ((readcnt = fread(buf, 1, size, f)) < size) { 756 if (ferror(f) && errno == EINTR && !sigint) 757 clearerr(f); 758 else if (readcnt == 0) 759 break; 760 } 761 762 stat_update(&xs, count += readcnt); 763 for (ptr = buf; readcnt > 0; ptr += wr, readcnt -= wr) 764 if ((wr = fwrite(ptr, 1, readcnt, of)) < readcnt) { 765 if (ferror(of) && errno == EINTR && !sigint) 766 clearerr(of); 767 else 768 break; 769 } 770 if (readcnt != 0) 771 break; 772 } 773 timedout = ferror(f) && errno == ETIMEDOUT; 774 signal(SIGINFO, SIG_DFL); 775 776 stat_end(&xs); 777 778 /* 779 * If the transfer timed out or was interrupted, we still want to 780 * set the mtime in case the file is not removed (-r or -R) and 781 * the user later restarts the transfer. 782 */ 783 signal: 784 /* set mtime of local file */ 785 if (!n_flag && us.mtime && !o_stdout && of != NULL && 786 (stat(path, &sb) != -1) && sb.st_mode & S_IFREG) { 787 struct timeval tv[2]; 788 789 fflush(of); 790 tv[0].tv_sec = (long)(us.atime ? us.atime : us.mtime); 791 tv[1].tv_sec = (long)us.mtime; 792 tv[0].tv_usec = tv[1].tv_usec = 0; 793 if (utimes(tmppath ? tmppath : path, tv)) 794 warn("%s: utimes()", tmppath ? tmppath : path); 795 } 796 797 /* timed out or interrupted? */ 798 if (timedout) { 799 warnx("transfer timed out"); 800 goto failure; 801 } 802 if (sigint) { 803 warnx("transfer interrupted"); 804 goto failure; 805 } 806 807 /* timeout / interrupt before connection completely established? */ 808 if (f == NULL) 809 goto failure; 810 811 if (!timedout) { 812 /* check the status of our files */ 813 if (ferror(f)) 814 warn("%s", URL); 815 if (ferror(of)) 816 warn("%s", path); 817 if (ferror(f) || ferror(of)) 818 goto failure; 819 } 820 821 /* did the transfer complete normally? */ 822 if (us.size != -1 && count < us.size) { 823 warnx("%s appears to be truncated: %jd/%jd bytes", 824 path, (intmax_t)count, (intmax_t)us.size); 825 if(!o_stdout && a_flag && count > size_prev) { 826 fclose(f); 827 if (w_secs) 828 sleep(w_secs); 829 tries++; 830 goto again; 831 } 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 (timedout && 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, is_http, 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 = strtoll(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_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 sa.sa_flags = SA_RESETHAND; 1116 sigaction(SIGINT, &sa, NULL); 1117 fetchRestartCalls = 0; 1118 1119 /* output file */ 1120 if (o_flag) { 1121 if (strcmp(o_filename, "-") == 0) { 1122 o_stdout = 1; 1123 } else if (stat(o_filename, &sb) == -1) { 1124 if (errno == ENOENT) { 1125 if (argc > 1) 1126 errx(1, "%s is not a directory", 1127 o_filename); 1128 } else { 1129 err(1, "%s", o_filename); 1130 } 1131 } else { 1132 if (sb.st_mode & S_IFDIR) 1133 o_directory = 1; 1134 } 1135 } 1136 1137 /* check if output is to a tty (for progress report) */ 1138 v_tty = isatty(STDERR_FILENO); 1139 v_progress = v_tty && v_level > 0; 1140 if (v_progress) 1141 pgrp = getpgrp(); 1142 1143 r = 0; 1144 1145 /* authentication */ 1146 if (v_tty) 1147 fetchAuthMethod = query_auth; 1148 if (N_filename != NULL) 1149 if (setenv("NETRC", N_filename, 1) == -1) 1150 err(1, "setenv: cannot set NETRC=%s", N_filename); 1151 1152 while (argc) { 1153 if ((p = strrchr(*argv, '/')) == NULL) 1154 p = *argv; 1155 else 1156 p++; 1157 1158 if (!*p) 1159 p = "fetch.out"; 1160 1161 fetchLastErrCode = 0; 1162 1163 if (o_flag) { 1164 if (o_stdout) { 1165 e = fetch(*argv, "-", &is_http); 1166 } else if (o_directory) { 1167 asprintf(&q, "%s/%s", o_filename, p); 1168 e = fetch(*argv, q, &is_http); 1169 free(q); 1170 } else { 1171 e = fetch(*argv, o_filename, &is_http); 1172 } 1173 } else { 1174 e = fetch(*argv, p, &is_http); 1175 } 1176 1177 if (sigint) 1178 kill(getpid(), SIGINT); 1179 1180 if (e == 0 && once_flag) 1181 exit(0); 1182 1183 if (e) { 1184 r = 1; 1185 if ((fetchLastErrCode 1186 && fetchLastErrCode != FETCH_AUTH 1187 && fetchLastErrCode != FETCH_UNAVAIL 1188 && fetchLastErrCode != FETCH_MOVED 1189 && fetchLastErrCode != FETCH_URL 1190 && fetchLastErrCode != FETCH_RESOLV 1191 && fetchLastErrCode != FETCH_UNKNOWN 1192 && (!is_http || ( 1193 fetchLastErrCode != FETCH_PROTO 1194 && fetchLastErrCode != FETCH_SERVER 1195 && fetchLastErrCode != FETCH_TEMP 1196 && fetchLastErrCode != FETCH_TIMEOUT 1197 )))) { 1198 if (w_secs && v_level) 1199 fprintf(stderr, "Waiting %ld seconds " 1200 "before retrying\n", w_secs); 1201 if (w_secs) 1202 sleep(w_secs); 1203 if (a_flag) 1204 continue; 1205 } 1206 } 1207 1208 argc--, argv++; 1209 } 1210 1211 exit(r); 1212 } 1213