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 * $FreeBSD: head/usr.bin/fetch/fetch.c 338572 2018-09-10 19:39:20Z des $ 32 */ 33 34 #include <sys/param.h> 35 #include <sys/socket.h> 36 #include <sys/stat.h> 37 #include <sys/time.h> 38 39 #include <ctype.h> 40 #include <err.h> 41 #include <errno.h> 42 #include <getopt.h> 43 #include <signal.h> 44 #include <stdint.h> 45 #include <stdio.h> 46 #include <stdlib.h> 47 #include <string.h> 48 #include <termios.h> 49 #include <unistd.h> 50 51 #include <fetch.h> 52 53 #define MINBUFSIZE 16384 54 #define TIMEOUT 120 55 56 /* Option flags */ 57 static int A_flag; /* -A: do not follow 302 redirects */ 58 static int a_flag; /* -a: auto retry */ 59 static off_t B_size; /* -B: buffer size */ 60 static int b_flag; /*! -b: workaround TCP bug */ 61 static char *c_dirname; /* -c: remote directory */ 62 static int d_flag; /* -d: direct connection */ 63 static int F_flag; /* -F: restart without checking mtime */ 64 static char *f_filename; /* -f: file to fetch */ 65 static char *h_hostname; /* -h: host to fetch from */ 66 static int i_flag; /* -i: specify file for mtime comparison */ 67 static char *i_filename; /* name of input file */ 68 static int l_flag; /* -l: link rather than copy file: URLs */ 69 static int m_flag; /* -[Mm]: mirror mode */ 70 static char *N_filename; /* -N: netrc file name */ 71 static int n_flag; /* -n: do not preserve modification time */ 72 static int o_flag; /* -o: specify output file */ 73 static int o_directory; /* output file is a directory */ 74 static char *o_filename; /* name of output file */ 75 static int o_stdout; /* output file is stdout */ 76 static int once_flag; /* -1: stop at first successful file */ 77 static int p_flag; /* -[Pp]: use passive FTP */ 78 static int R_flag; /* -R: don't delete partial files */ 79 static int r_flag; /* -r: restart previous transfer */ 80 static off_t S_size; /* -S: require size to match */ 81 static int s_flag; /* -s: show size, don't fetch */ 82 static long T_secs; /* -T: transfer timeout in seconds */ 83 static int t_flag; /*! -t: workaround TCP bug */ 84 static int U_flag; /* -U: do not use high ports */ 85 static int v_level = 1; /* -v: verbosity level */ 86 static int v_tty; /* stdout is a tty */ 87 static int v_progress; /* whether to display progress */ 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 * Format a number of seconds as either XXdYYh, XXhYYm, XXmYYs, or XXs 203 * depending on its magnitude 204 */ 205 static void 206 stat_seconds(char *str, size_t strsz, long seconds) 207 { 208 209 if (seconds > 86400) 210 snprintf(str, strsz, "%02ldd%02ldh", 211 seconds / 86400, (seconds % 86400) / 3600); 212 else if (seconds > 3600) 213 snprintf(str, strsz, "%02ldh%02ldm", 214 seconds / 3600, (seconds % 3600) / 60); 215 else if (seconds > 60) 216 snprintf(str, strsz, "%02ldm%02lds", 217 seconds / 60, seconds % 60); 218 else 219 snprintf(str, strsz, " %02lds", 220 seconds); 221 } 222 223 /* 224 * Compute and display ETA 225 */ 226 static void 227 stat_eta(char *str, size_t strsz, const struct xferstat *xs) 228 { 229 long elapsed, eta; 230 off_t received, expected; 231 232 elapsed = xs->last.tv_sec - xs->start.tv_sec; 233 received = xs->rcvd - xs->offset; 234 expected = xs->size - xs->rcvd; 235 eta = (long)((double)elapsed * expected / received); 236 if (eta > 0) 237 stat_seconds(str, strsz, eta); 238 else 239 stat_seconds(str, strsz, elapsed); 240 } 241 242 /* 243 * Format a number as "xxxx YB" where Y is ' ', 'k', 'M'... 244 */ 245 static const char *prefixes = " kMGTP"; 246 static void 247 stat_bytes(char *str, size_t strsz, off_t bytes) 248 { 249 const char *prefix = prefixes; 250 251 while (bytes > 9999 && prefix[1] != '\0') { 252 bytes /= 1024; 253 prefix++; 254 } 255 snprintf(str, strsz, "%4ju %cB", (uintmax_t)bytes, *prefix); 256 } 257 258 /* 259 * Compute and display transfer rate 260 */ 261 static void 262 stat_bps(char *str, size_t strsz, struct xferstat *xs) 263 { 264 char bytes[16]; 265 double delta, bps; 266 267 delta = ((double)xs->last.tv_sec + (xs->last.tv_usec / 1.e6)) 268 - ((double)xs->last2.tv_sec + (xs->last2.tv_usec / 1.e6)); 269 270 if (delta == 0.0) { 271 snprintf(str, strsz, "?? Bps"); 272 } else { 273 bps = (xs->rcvd - xs->lastrcvd) / delta; 274 stat_bytes(bytes, sizeof bytes, (off_t)bps); 275 snprintf(str, strsz, "%sps", bytes); 276 } 277 } 278 279 /* 280 * Update the stats display 281 */ 282 static void 283 stat_display(struct xferstat *xs, int force) 284 { 285 char bytes[16], bps[16], eta[16]; 286 struct timeval now; 287 int ctty_pgrp; 288 289 /* check if we're the foreground process */ 290 if (ioctl(STDERR_FILENO, TIOCGPGRP, &ctty_pgrp) != 0 || 291 (pid_t)ctty_pgrp != pgrp) 292 return; 293 294 gettimeofday(&now, NULL); 295 if (!force && now.tv_sec <= xs->last.tv_sec) 296 return; 297 xs->last2 = xs->last; 298 xs->last = now; 299 300 fprintf(stderr, "\r%-46.46s", xs->name); 301 if (xs->rcvd >= xs->size) { 302 stat_bytes(bytes, sizeof bytes, xs->rcvd); 303 setproctitle("%s [%s]", xs->name, bytes); 304 fprintf(stderr, " %s", bytes); 305 } else { 306 stat_bytes(bytes, sizeof bytes, xs->size); 307 setproctitle("%s [%d%% of %s]", xs->name, 308 (int)((100.0 * xs->rcvd) / xs->size), 309 bytes); 310 fprintf(stderr, "%3d%% of %s", 311 (int)((100.0 * xs->rcvd) / xs->size), 312 bytes); 313 } 314 if (force == 2) { 315 xs->lastrcvd = xs->offset; 316 xs->last2 = xs->start; 317 } 318 stat_bps(bps, sizeof bps, xs); 319 fprintf(stderr, " %s", bps); 320 if ((xs->size > 0 && xs->rcvd > 0 && 321 xs->last.tv_sec >= xs->start.tv_sec + 3) || 322 force == 2) { 323 stat_eta(eta, sizeof eta, xs); 324 fprintf(stderr, " %s", eta); 325 } 326 xs->lastrcvd = xs->rcvd; 327 } 328 329 /* 330 * Initialize the transfer statistics 331 */ 332 static void 333 stat_start(struct xferstat *xs, const char *name, off_t size, off_t offset) 334 { 335 336 memset(xs, 0, sizeof *xs); 337 snprintf(xs->name, sizeof xs->name, "%s", name); 338 gettimeofday(&xs->start, NULL); 339 xs->last2 = xs->last = xs->start; 340 xs->size = size; 341 xs->offset = offset; 342 xs->rcvd = offset; 343 xs->lastrcvd = offset; 344 if (v_progress) 345 stat_display(xs, 1); 346 else if (v_level > 0) 347 fprintf(stderr, "%-46s", xs->name); 348 } 349 350 /* 351 * Update the transfer statistics 352 */ 353 static void 354 stat_update(struct xferstat *xs, off_t rcvd) 355 { 356 357 xs->rcvd = rcvd; 358 if (v_progress) 359 stat_display(xs, 0); 360 } 361 362 /* 363 * Finalize the transfer statistics 364 */ 365 static void 366 stat_end(struct xferstat *xs) 367 { 368 char bytes[16], bps[16], eta[16]; 369 370 gettimeofday(&xs->last, NULL); 371 if (v_progress) { 372 stat_display(xs, 2); 373 putc('\n', stderr); 374 } else if (v_level > 0) { 375 stat_bytes(bytes, sizeof bytes, xs->rcvd); 376 stat_bps(bps, sizeof bps, xs); 377 stat_eta(eta, sizeof eta, xs); 378 fprintf(stderr, " %s %s %s\n", bytes, bps, eta); 379 } 380 } 381 382 /* 383 * Ask the user for authentication details 384 */ 385 static int 386 query_auth(struct url *URL) 387 { 388 struct termios tios; 389 tcflag_t saved_flags; 390 int i, nopwd; 391 392 fprintf(stderr, "Authentication required for <%s://%s:%d/>!\n", 393 URL->scheme, URL->host, URL->port); 394 395 fprintf(stderr, "Login: "); 396 if (fgets(URL->user, sizeof URL->user, stdin) == NULL) 397 return (-1); 398 for (i = strlen(URL->user); i >= 0; --i) 399 if (URL->user[i] == '\r' || URL->user[i] == '\n') 400 URL->user[i] = '\0'; 401 402 fprintf(stderr, "Password: "); 403 if (tcgetattr(STDIN_FILENO, &tios) == 0) { 404 saved_flags = tios.c_lflag; 405 tios.c_lflag &= ~ECHO; 406 tios.c_lflag |= ECHONL|ICANON; 407 tcsetattr(STDIN_FILENO, TCSAFLUSH|TCSASOFT, &tios); 408 nopwd = (fgets(URL->pwd, sizeof URL->pwd, stdin) == NULL); 409 tios.c_lflag = saved_flags; 410 tcsetattr(STDIN_FILENO, TCSANOW|TCSASOFT, &tios); 411 } else { 412 nopwd = (fgets(URL->pwd, sizeof URL->pwd, stdin) == NULL); 413 } 414 if (nopwd) 415 return (-1); 416 for (i = strlen(URL->pwd); i >= 0; --i) 417 if (URL->pwd[i] == '\r' || URL->pwd[i] == '\n') 418 URL->pwd[i] = '\0'; 419 420 return (0); 421 } 422 423 /* 424 * Fetch a file 425 */ 426 static int 427 fetch(char *URL, const char *path) 428 { 429 struct url *url; 430 struct url_stat us; 431 struct stat sb, nsb; 432 struct xferstat xs; 433 FILE *f, *of; 434 size_t size, readcnt, wr; 435 off_t count; 436 char flags[8]; 437 const char *slash; 438 char *tmppath; 439 int r; 440 unsigned timeout; 441 char *ptr; 442 443 f = of = NULL; 444 tmppath = NULL; 445 446 timeout = 0; 447 *flags = 0; 448 count = 0; 449 450 /* set verbosity level */ 451 if (v_level > 1) 452 strcat(flags, "v"); 453 if (v_level > 2) 454 fetchDebug = 1; 455 456 /* parse URL */ 457 url = NULL; 458 if (*URL == '\0') { 459 warnx("empty URL"); 460 goto failure; 461 } 462 if ((url = fetchParseURL(URL)) == NULL) { 463 warnx("%s: parse error", URL); 464 goto failure; 465 } 466 467 /* if no scheme was specified, take a guess */ 468 if (!*url->scheme) { 469 if (!*url->host) 470 strcpy(url->scheme, SCHEME_FILE); 471 else if (strncasecmp(url->host, "ftp.", 4) == 0) 472 strcpy(url->scheme, SCHEME_FTP); 473 else if (strncasecmp(url->host, "www.", 4) == 0) 474 strcpy(url->scheme, SCHEME_HTTP); 475 } 476 477 /* common flags */ 478 switch (family) { 479 case PF_INET: 480 strcat(flags, "4"); 481 break; 482 case PF_INET6: 483 strcat(flags, "6"); 484 break; 485 } 486 487 /* FTP specific flags */ 488 if (strcmp(url->scheme, SCHEME_FTP) == 0) { 489 if (p_flag) 490 strcat(flags, "p"); 491 if (d_flag) 492 strcat(flags, "d"); 493 if (U_flag) 494 strcat(flags, "l"); 495 timeout = T_secs ? T_secs : ftp_timeout; 496 } 497 498 /* HTTP specific flags */ 499 if (strcmp(url->scheme, SCHEME_HTTP) == 0 || 500 strcmp(url->scheme, SCHEME_HTTPS) == 0) { 501 if (d_flag) 502 strcat(flags, "d"); 503 if (A_flag) 504 strcat(flags, "A"); 505 timeout = T_secs ? T_secs : http_timeout; 506 if (i_flag) { 507 if (stat(i_filename, &sb)) { 508 warn("%s: stat()", i_filename); 509 goto failure; 510 } 511 url->ims_time = sb.st_mtime; 512 strcat(flags, "i"); 513 } 514 } 515 516 /* set the protocol timeout. */ 517 fetchTimeout = timeout; 518 519 /* just print size */ 520 if (s_flag) { 521 if (timeout) 522 alarm(timeout); 523 r = fetchStat(url, &us, flags); 524 if (timeout) 525 alarm(0); 526 if (sigalrm || sigint) 527 goto signal; 528 if (r == -1) { 529 warnx("%s", fetchLastErrString); 530 goto failure; 531 } 532 if (us.size == -1) 533 printf("Unknown\n"); 534 else 535 printf("%jd\n", (intmax_t)us.size); 536 goto success; 537 } 538 539 /* 540 * If the -r flag was specified, we have to compare the local 541 * and remote files, so we should really do a fetchStat() 542 * first, but I know of at least one HTTP server that only 543 * sends the content size in response to GET requests, and 544 * leaves it out of replies to HEAD requests. Also, in the 545 * (frequent) case that the local and remote files match but 546 * the local file is truncated, we have sufficient information 547 * before the compare to issue a correct request. Therefore, 548 * we always issue a GET request as if we were sure the local 549 * file was a truncated copy of the remote file; we can drop 550 * the connection later if we change our minds. 551 */ 552 sb.st_size = -1; 553 if (!o_stdout) { 554 r = stat(path, &sb); 555 if (r == 0 && r_flag && S_ISREG(sb.st_mode)) { 556 url->offset = sb.st_size; 557 } else if (r == -1 || !S_ISREG(sb.st_mode)) { 558 /* 559 * Whatever value sb.st_size has now is either 560 * wrong (if stat(2) failed) or irrelevant (if the 561 * path does not refer to a regular file) 562 */ 563 sb.st_size = -1; 564 } 565 if (r == -1 && errno != ENOENT) { 566 warnx("%s: stat()", path); 567 goto failure; 568 } 569 } 570 571 /* start the transfer */ 572 if (timeout) 573 alarm(timeout); 574 f = fetchXGet(url, &us, flags); 575 if (timeout) 576 alarm(0); 577 if (sigalrm || sigint) 578 goto signal; 579 if (f == NULL) { 580 warnx("%s: %s", URL, fetchLastErrString); 581 if (i_flag && (strcmp(url->scheme, SCHEME_HTTP) == 0 || 582 strcmp(url->scheme, SCHEME_HTTPS) == 0) && 583 fetchLastErrCode == FETCH_OK && 584 strcmp(fetchLastErrString, "Not Modified") == 0) { 585 /* HTTP Not Modified Response, return OK. */ 586 r = 0; 587 goto done; 588 } else 589 goto failure; 590 } 591 if (sigint) 592 goto signal; 593 594 /* check that size is as expected */ 595 if (S_size) { 596 if (us.size == -1) { 597 warnx("%s: size unknown", URL); 598 } else if (us.size != S_size) { 599 warnx("%s: size mismatch: expected %jd, actual %jd", 600 URL, (intmax_t)S_size, (intmax_t)us.size); 601 goto failure; 602 } 603 } 604 605 /* symlink instead of copy */ 606 if (l_flag && strcmp(url->scheme, "file") == 0 && !o_stdout) { 607 if (symlink(url->doc, path) == -1) { 608 warn("%s: symlink()", path); 609 goto failure; 610 } 611 goto success; 612 } 613 614 if (us.size == -1 && !o_stdout && v_level > 0) 615 warnx("%s: size of remote file is not known", URL); 616 if (v_level > 1) { 617 if (sb.st_size != -1) 618 fprintf(stderr, "local size / mtime: %jd / %ld\n", 619 (intmax_t)sb.st_size, (long)sb.st_mtime); 620 if (us.size != -1) 621 fprintf(stderr, "remote size / mtime: %jd / %ld\n", 622 (intmax_t)us.size, (long)us.mtime); 623 } 624 625 /* open output file */ 626 if (o_stdout) { 627 /* output to stdout */ 628 of = stdout; 629 } else if (r_flag && sb.st_size != -1) { 630 /* resume mode, local file exists */ 631 if (!F_flag && us.mtime && sb.st_mtime != us.mtime) { 632 /* no match! have to refetch */ 633 fclose(f); 634 /* if precious, warn the user and give up */ 635 if (R_flag) { 636 warnx("%s: local modification time " 637 "does not match remote", path); 638 goto failure_keep; 639 } 640 } else if (url->offset > sb.st_size) { 641 /* gap between what we asked for and what we got */ 642 warnx("%s: gap in resume mode", URL); 643 fclose(of); 644 of = NULL; 645 /* picked up again later */ 646 } else if (us.size != -1) { 647 if (us.size == sb.st_size) 648 /* nothing to do */ 649 goto success; 650 if (sb.st_size > us.size) { 651 /* local file too long! */ 652 warnx("%s: local file (%jd bytes) is longer " 653 "than remote file (%jd bytes)", path, 654 (intmax_t)sb.st_size, (intmax_t)us.size); 655 goto failure; 656 } 657 /* we got it, open local file */ 658 if ((of = fopen(path, "r+")) == NULL) { 659 warn("%s: fopen()", path); 660 goto failure; 661 } 662 /* check that it didn't move under our feet */ 663 if (fstat(fileno(of), &nsb) == -1) { 664 /* can't happen! */ 665 warn("%s: fstat()", path); 666 goto failure; 667 } 668 if (nsb.st_dev != sb.st_dev || 669 nsb.st_ino != sb.st_ino || 670 nsb.st_size != sb.st_size) { 671 warnx("%s: file has changed", URL); 672 fclose(of); 673 of = NULL; 674 sb = nsb; 675 /* picked up again later */ 676 } 677 } 678 /* seek to where we left off */ 679 if (of != NULL && fseeko(of, url->offset, SEEK_SET) != 0) { 680 warn("%s: fseeko()", path); 681 fclose(of); 682 of = NULL; 683 /* picked up again later */ 684 } 685 } else if (m_flag && sb.st_size != -1) { 686 /* mirror mode, local file exists */ 687 if (sb.st_size == us.size && sb.st_mtime == us.mtime) 688 goto success; 689 } 690 691 if (of == NULL) { 692 /* 693 * We don't yet have an output file; either this is a 694 * vanilla run with no special flags, or the local and 695 * remote files didn't match. 696 */ 697 698 if (url->offset > 0) { 699 /* 700 * We tried to restart a transfer, but for 701 * some reason gave up - so we have to restart 702 * from scratch if we want the whole file 703 */ 704 url->offset = 0; 705 if ((f = fetchXGet(url, &us, flags)) == NULL) { 706 warnx("%s: %s", URL, fetchLastErrString); 707 goto failure; 708 } 709 if (sigint) 710 goto signal; 711 } 712 713 /* construct a temp file name */ 714 if (sb.st_size != -1 && S_ISREG(sb.st_mode)) { 715 if ((slash = strrchr(path, '/')) == NULL) 716 slash = path; 717 else 718 ++slash; 719 asprintf(&tmppath, "%.*s.fetch.XXXXXX.%s", 720 (int)(slash - path), path, slash); 721 if (tmppath != NULL) { 722 if (mkstemps(tmppath, strlen(slash) + 1) == -1) { 723 warn("%s: mkstemps()", path); 724 goto failure; 725 } 726 of = fopen(tmppath, "w"); 727 chown(tmppath, sb.st_uid, sb.st_gid); 728 chmod(tmppath, sb.st_mode & ALLPERMS); 729 } 730 } 731 if (of == NULL) 732 of = fopen(path, "w"); 733 if (of == NULL) { 734 warn("%s: open()", path); 735 goto failure; 736 } 737 } 738 count = url->offset; 739 740 /* start the counter */ 741 stat_start(&xs, path, us.size, count); 742 743 sigalrm = siginfo = sigint = 0; 744 745 /* suck in the data */ 746 setvbuf(f, NULL, _IOFBF, B_size); 747 signal(SIGINFO, sig_handler); 748 while (!sigint) { 749 if (us.size != -1 && us.size - count < B_size && 750 us.size - count >= 0) 751 size = us.size - count; 752 else 753 size = B_size; 754 if (siginfo) { 755 stat_end(&xs); 756 siginfo = 0; 757 } 758 759 if (size == 0) 760 break; 761 762 if ((readcnt = fread(buf, 1, size, f)) < size) { 763 if (ferror(f) && errno == EINTR && !sigint) 764 clearerr(f); 765 else if (readcnt == 0) 766 break; 767 } 768 769 stat_update(&xs, count += readcnt); 770 for (ptr = buf; readcnt > 0; ptr += wr, readcnt -= wr) 771 if ((wr = fwrite(ptr, 1, readcnt, of)) < readcnt) { 772 if (ferror(of) && errno == EINTR && !sigint) 773 clearerr(of); 774 else 775 break; 776 } 777 if (readcnt != 0) 778 break; 779 } 780 if (!sigalrm) 781 sigalrm = ferror(f) && errno == ETIMEDOUT; 782 signal(SIGINFO, SIG_DFL); 783 784 stat_end(&xs); 785 786 /* 787 * If the transfer timed out or was interrupted, we still want to 788 * set the mtime in case the file is not removed (-r or -R) and 789 * the user later restarts the transfer. 790 */ 791 signal: 792 /* set mtime of local file */ 793 if (!n_flag && us.mtime && !o_stdout && of != NULL && 794 (stat(path, &sb) != -1) && sb.st_mode & S_IFREG) { 795 struct timeval tv[2]; 796 797 fflush(of); 798 tv[0].tv_sec = (long)(us.atime ? us.atime : us.mtime); 799 tv[1].tv_sec = (long)us.mtime; 800 tv[0].tv_usec = tv[1].tv_usec = 0; 801 if (utimes(tmppath ? tmppath : path, tv)) 802 warn("%s: utimes()", tmppath ? tmppath : path); 803 } 804 805 /* timed out or interrupted? */ 806 if (sigalrm) 807 warnx("transfer timed out"); 808 if (sigint) { 809 warnx("transfer interrupted"); 810 goto failure; 811 } 812 813 /* timeout / interrupt before connection completley established? */ 814 if (f == NULL) 815 goto failure; 816 817 if (!sigalrm) { 818 /* check the status of our files */ 819 if (ferror(f)) 820 warn("%s", URL); 821 if (ferror(of)) 822 warn("%s", path); 823 if (ferror(f) || ferror(of)) 824 goto failure; 825 } 826 827 /* did the transfer complete normally? */ 828 if (us.size != -1 && count < us.size) { 829 warnx("%s appears to be truncated: %jd/%jd bytes", 830 path, (intmax_t)count, (intmax_t)us.size); 831 goto failure_keep; 832 } 833 834 /* 835 * If the transfer timed out and we didn't know how much to 836 * expect, assume the worst (i.e. we didn't get all of it) 837 */ 838 if (sigalrm && us.size == -1) { 839 warnx("%s may be truncated", path); 840 goto failure_keep; 841 } 842 843 success: 844 r = 0; 845 if (tmppath != NULL && rename(tmppath, path) == -1) { 846 warn("%s: rename()", path); 847 goto failure_keep; 848 } 849 goto done; 850 failure: 851 if (of && of != stdout && !R_flag && !r_flag) 852 if (stat(path, &sb) != -1 && (sb.st_mode & S_IFREG)) 853 unlink(tmppath ? tmppath : path); 854 if (R_flag && tmppath != NULL && sb.st_size == -1) 855 rename(tmppath, path); /* ignore errors here */ 856 failure_keep: 857 r = -1; 858 goto done; 859 done: 860 if (f) 861 fclose(f); 862 if (of && of != stdout) 863 fclose(of); 864 if (url) 865 fetchFreeURL(url); 866 if (tmppath != NULL) 867 free(tmppath); 868 return (r); 869 } 870 871 static void 872 usage(void) 873 { 874 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", 875 "usage: fetch [-146AadFlMmnPpqRrsUv] [-B bytes] [--bind-address=host]", 876 " [--ca-cert=file] [--ca-path=dir] [--cert=file] [--crl=file]", 877 " [-i file] [--key=file] [-N file] [--no-passive] [--no-proxy=list]", 878 " [--no-sslv3] [--no-tlsv1] [--no-verify-hostname] [--no-verify-peer]", 879 " [-o file] [--referer=URL] [-S bytes] [-T seconds]", 880 " [--user-agent=agent-string] [-w seconds] URL ...", 881 " fetch [-146AadFlMmnPpqRrsUv] [-B bytes] [--bind-address=host]", 882 " [--ca-cert=file] [--ca-path=dir] [--cert=file] [--crl=file]", 883 " [-i file] [--key=file] [-N file] [--no-passive] [--no-proxy=list]", 884 " [--no-sslv3] [--no-tlsv1] [--no-verify-hostname] [--no-verify-peer]", 885 " [-o file] [--referer=URL] [-S bytes] [-T seconds]", 886 " [--user-agent=agent-string] [-w seconds] -h host -f file [-c dir]"); 887 } 888 889 890 /* 891 * Entry point 892 */ 893 int 894 main(int argc, char *argv[]) 895 { 896 struct stat sb; 897 struct sigaction sa; 898 const char *p, *s; 899 char *end, *q; 900 int c, e, r; 901 902 903 while ((c = getopt_long(argc, argv, 904 "146AaB:bc:dFf:Hh:i:lMmN:nPpo:qRrS:sT:tUvw:", 905 longopts, NULL)) != -1) 906 switch (c) { 907 case '1': 908 once_flag = 1; 909 break; 910 case '4': 911 family = PF_INET; 912 break; 913 case '6': 914 family = PF_INET6; 915 break; 916 case 'A': 917 A_flag = 1; 918 break; 919 case 'a': 920 a_flag = 1; 921 break; 922 case 'B': 923 B_size = (off_t)strtol(optarg, &end, 10); 924 if (*optarg == '\0' || *end != '\0') 925 errx(1, "invalid buffer size (%s)", optarg); 926 break; 927 case 'b': 928 warnx("warning: the -b option is deprecated"); 929 b_flag = 1; 930 break; 931 case 'c': 932 c_dirname = optarg; 933 break; 934 case 'd': 935 d_flag = 1; 936 break; 937 case 'F': 938 F_flag = 1; 939 break; 940 case 'f': 941 f_filename = optarg; 942 break; 943 case 'H': 944 warnx("the -H option is now implicit, " 945 "use -U to disable"); 946 break; 947 case 'h': 948 h_hostname = optarg; 949 break; 950 case 'i': 951 i_flag = 1; 952 i_filename = optarg; 953 break; 954 case 'l': 955 l_flag = 1; 956 break; 957 case 'o': 958 o_flag = 1; 959 o_filename = optarg; 960 break; 961 case 'M': 962 case 'm': 963 if (r_flag) 964 errx(1, "the -m and -r flags " 965 "are mutually exclusive"); 966 m_flag = 1; 967 break; 968 case 'N': 969 N_filename = optarg; 970 break; 971 case 'n': 972 n_flag = 1; 973 break; 974 case 'P': 975 case 'p': 976 p_flag = 1; 977 break; 978 case 'q': 979 v_level = 0; 980 break; 981 case 'R': 982 R_flag = 1; 983 break; 984 case 'r': 985 if (m_flag) 986 errx(1, "the -m and -r flags " 987 "are mutually exclusive"); 988 r_flag = 1; 989 break; 990 case 'S': 991 S_size = (off_t)strtol(optarg, &end, 10); 992 if (*optarg == '\0' || *end != '\0') 993 errx(1, "invalid size (%s)", optarg); 994 break; 995 case 's': 996 s_flag = 1; 997 break; 998 case 'T': 999 T_secs = strtol(optarg, &end, 10); 1000 if (*optarg == '\0' || *end != '\0') 1001 errx(1, "invalid timeout (%s)", optarg); 1002 break; 1003 case 't': 1004 t_flag = 1; 1005 warnx("warning: the -t option is deprecated"); 1006 break; 1007 case 'U': 1008 U_flag = 1; 1009 break; 1010 case 'v': 1011 v_level++; 1012 break; 1013 case 'w': 1014 a_flag = 1; 1015 w_secs = strtol(optarg, &end, 10); 1016 if (*optarg == '\0' || *end != '\0') 1017 errx(1, "invalid delay (%s)", optarg); 1018 break; 1019 case OPTION_BIND_ADDRESS: 1020 setenv("FETCH_BIND_ADDRESS", optarg, 1); 1021 break; 1022 case OPTION_NO_FTP_PASSIVE_MODE: 1023 setenv("FTP_PASSIVE_MODE", "no", 1); 1024 break; 1025 case OPTION_HTTP_REFERER: 1026 setenv("HTTP_REFERER", optarg, 1); 1027 break; 1028 case OPTION_HTTP_USER_AGENT: 1029 setenv("HTTP_USER_AGENT", optarg, 1); 1030 break; 1031 case OPTION_NO_PROXY: 1032 setenv("NO_PROXY", optarg, 1); 1033 break; 1034 case OPTION_SSL_CA_CERT_FILE: 1035 setenv("SSL_CA_CERT_FILE", optarg, 1); 1036 break; 1037 case OPTION_SSL_CA_CERT_PATH: 1038 setenv("SSL_CA_CERT_PATH", optarg, 1); 1039 break; 1040 case OPTION_SSL_CLIENT_CERT_FILE: 1041 setenv("SSL_CLIENT_CERT_FILE", optarg, 1); 1042 break; 1043 case OPTION_SSL_CLIENT_KEY_FILE: 1044 setenv("SSL_CLIENT_KEY_FILE", optarg, 1); 1045 break; 1046 case OPTION_SSL_CRL_FILE: 1047 setenv("SSL_CLIENT_CRL_FILE", optarg, 1); 1048 break; 1049 case OPTION_SSL_NO_SSL3: 1050 setenv("SSL_NO_SSL3", "", 1); 1051 break; 1052 case OPTION_SSL_NO_TLS1: 1053 setenv("SSL_NO_TLS1", "", 1); 1054 break; 1055 case OPTION_SSL_NO_VERIFY_HOSTNAME: 1056 setenv("SSL_NO_VERIFY_HOSTNAME", "", 1); 1057 break; 1058 case OPTION_SSL_NO_VERIFY_PEER: 1059 setenv("SSL_NO_VERIFY_PEER", "", 1); 1060 break; 1061 default: 1062 usage(); 1063 exit(1); 1064 } 1065 1066 argc -= optind; 1067 argv += optind; 1068 1069 if (h_hostname || f_filename || c_dirname) { 1070 if (!h_hostname || !f_filename || argc) { 1071 usage(); 1072 exit(1); 1073 } 1074 /* XXX this is a hack. */ 1075 if (strcspn(h_hostname, "@:/") != strlen(h_hostname)) 1076 errx(1, "invalid hostname"); 1077 if (asprintf(argv, "ftp://%s/%s/%s", h_hostname, 1078 c_dirname ? c_dirname : "", f_filename) == -1) 1079 errx(1, "%s", strerror(ENOMEM)); 1080 argc++; 1081 } 1082 1083 if (!argc) { 1084 usage(); 1085 exit(1); 1086 } 1087 1088 /* allocate buffer */ 1089 if (B_size < MINBUFSIZE) 1090 B_size = MINBUFSIZE; 1091 if ((buf = malloc(B_size)) == NULL) 1092 errx(1, "%s", strerror(ENOMEM)); 1093 1094 /* timeouts */ 1095 if ((s = getenv("FTP_TIMEOUT")) != NULL) { 1096 ftp_timeout = strtol(s, &end, 10); 1097 if (*s == '\0' || *end != '\0' || ftp_timeout < 0) { 1098 warnx("FTP_TIMEOUT (%s) is not a positive integer", s); 1099 ftp_timeout = 0; 1100 } 1101 } 1102 if ((s = getenv("HTTP_TIMEOUT")) != NULL) { 1103 http_timeout = strtol(s, &end, 10); 1104 if (*s == '\0' || *end != '\0' || http_timeout < 0) { 1105 warnx("HTTP_TIMEOUT (%s) is not a positive integer", s); 1106 http_timeout = 0; 1107 } 1108 } 1109 1110 /* signal handling */ 1111 sa.sa_flags = 0; 1112 sa.sa_handler = sig_handler; 1113 sigemptyset(&sa.sa_mask); 1114 sigaction(SIGALRM, &sa, NULL); 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 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