fetch.c revision 1.63
1 /* $NetBSD: fetch.c,v 1.63 1999/07/12 13:20:34 lukem Exp $ */ 2 3 /*- 4 * Copyright (c) 1997, 1998, 1999 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Luke Mewburn. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 #include <sys/cdefs.h> 40 #ifndef lint 41 __RCSID("$NetBSD: fetch.c,v 1.63 1999/07/12 13:20:34 lukem Exp $"); 42 #endif /* not lint */ 43 44 /* 45 * FTP User Program -- Command line file retrieval 46 */ 47 48 #include <sys/types.h> 49 #include <sys/param.h> 50 #include <sys/socket.h> 51 #include <sys/stat.h> 52 #include <sys/time.h> 53 #include <sys/utsname.h> 54 55 #include <netinet/in.h> 56 57 #include <arpa/ftp.h> 58 #include <arpa/inet.h> 59 60 #include <ctype.h> 61 #include <err.h> 62 #include <errno.h> 63 #include <netdb.h> 64 #include <fcntl.h> 65 #include <signal.h> 66 #include <stdio.h> 67 #include <stdlib.h> 68 #include <string.h> 69 #include <unistd.h> 70 #include <time.h> 71 #include <util.h> 72 73 #include "ftp_var.h" 74 75 typedef enum { 76 UNKNOWN_URL_T=-1, 77 HTTP_URL_T, 78 FTP_URL_T, 79 FILE_URL_T, 80 CLASSIC_URL_T 81 } url_t; 82 83 void aborthttp __P((int)); 84 static int auth_url __P((const char *, char **, const char *, 85 const char *)); 86 static void base64_encode __P((const char *, size_t, char *)); 87 static int go_fetch __P((const char *)); 88 static int fetch_ftp __P((const char *)); 89 static int fetch_url __P((const char *, const char *, char *, char *)); 90 static int parse_url __P((const char *, const char *, url_t *, char **, 91 char **, char **, char **, char **)); 92 static void url_decode __P((char *)); 93 94 static int redirect_loop; 95 96 97 #define ABOUT_URL "about:" /* propaganda */ 98 #define FILE_URL "file://" /* file URL prefix */ 99 #define FTP_URL "ftp://" /* ftp URL prefix */ 100 #define HTTP_URL "http://" /* http URL prefix */ 101 102 103 #define EMPTYSTRING(x) ((x) == NULL || (*(x) == '\0')) 104 #define FREEPTR(x) if ((x) != NULL) { free(x); (x) = NULL; } 105 106 /* 107 * Generate authorization response based on given authentication challenge. 108 * Returns -1 if an error occurred, otherwise 0. 109 * Sets response to a malloc(3)ed string; caller should free. 110 */ 111 static int 112 auth_url(challenge, response, guser, gpass) 113 const char *challenge; 114 char **response; 115 const char *guser; 116 const char *gpass; 117 { 118 char *cp, *ep, *clear, *line, *realm, *scheme; 119 char user[BUFSIZ], *pass; 120 int rval; 121 size_t len; 122 123 *response = NULL; 124 clear = realm = scheme = NULL; 125 rval = -1; 126 line = xstrdup(challenge); 127 cp = line; 128 129 if (debug) 130 fprintf(ttyout, "auth_url: challenge `%s'\n", challenge); 131 132 scheme = strsep(&cp, " "); 133 #define SCHEME_BASIC "Basic" 134 if (strncasecmp(scheme, SCHEME_BASIC, sizeof(SCHEME_BASIC) - 1) != 0) { 135 warnx("Unsupported WWW Authentication challenge - `%s'", 136 challenge); 137 goto cleanup_auth_url; 138 } 139 cp += strspn(cp, " "); 140 141 #define REALM "realm=\"" 142 if (strncasecmp(cp, REALM, sizeof(REALM) - 1) == 0) 143 cp += sizeof(REALM) - 1; 144 else { 145 warnx("Unsupported WWW Authentication challenge - `%s'", 146 challenge); 147 goto cleanup_auth_url; 148 } 149 if ((ep = strchr(cp, '\"')) != NULL) { 150 size_t len = ep - cp; 151 152 realm = (char *)xmalloc(len + 1); 153 strncpy(realm, cp, len); 154 realm[len] = '\0'; 155 } else { 156 warnx("Unsupported WWW Authentication challenge - `%s'", 157 challenge); 158 goto cleanup_auth_url; 159 } 160 161 if (guser != NULL) { 162 strncpy(user, guser, sizeof(user) - 1); 163 user[sizeof(user) - 1] = '\0'; 164 } else { 165 fprintf(ttyout, "Username for `%s': ", realm); 166 (void)fflush(ttyout); 167 if (fgets(user, sizeof(user) - 1, stdin) == NULL) 168 goto cleanup_auth_url; 169 user[strlen(user) - 1] = '\0'; 170 } 171 if (gpass != NULL) 172 pass = (char *)gpass; 173 else 174 pass = getpass("Password: "); 175 176 len = strlen(user) + strlen(pass) + 1; /* user + ":" + pass */ 177 clear = (char *)xmalloc(len + 1); 178 snprintf(clear, len, "%s:%s", user, pass); 179 if (gpass == NULL) 180 memset(pass, '\0', strlen(pass)); 181 182 /* scheme + " " + enc */ 183 len = strlen(scheme) + 1 + (len + 2) * 4 / 3; 184 *response = (char *)xmalloc(len + 1); 185 len = snprintf(*response, len, "%s ", scheme); 186 base64_encode(clear, strlen(clear), *response + len); 187 memset(clear, '\0', strlen(clear)); 188 rval = 0; 189 190 cleanup_auth_url: 191 FREEPTR(clear); 192 FREEPTR(line); 193 FREEPTR(realm); 194 return (rval); 195 } 196 197 /* 198 * Encode len bytes starting at clear using base64 encoding into encoded, 199 * which should be at least ((len + 2) * 4 / 3 + 1) in size. 200 */ 201 void 202 base64_encode(clear, len, encoded) 203 const char *clear; 204 size_t len; 205 char *encoded; 206 { 207 static const char enc[] = 208 "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"; 209 char *cp; 210 int i; 211 212 cp = encoded; 213 for (i = 0; i < len; i += 3) { 214 *(cp++) = enc[((clear[i + 0] >> 2))]; 215 *(cp++) = enc[((clear[i + 0] << 4) & 0x30) 216 | ((clear[i + 1] >> 4) & 0x0f)]; 217 *(cp++) = enc[((clear[i + 1] << 2) & 0x3c) 218 | ((clear[i + 2] >> 6) & 0x03)]; 219 *(cp++) = enc[((clear[i + 2] ) & 0x3f)]; 220 } 221 *cp = '\0'; 222 while (i-- > len) 223 *(--cp) = '='; 224 } 225 226 /* 227 * Decode %xx escapes in given string, `in-place'. 228 */ 229 static void 230 url_decode(url) 231 char *url; 232 { 233 unsigned char *p, *q; 234 235 if (EMPTYSTRING(url)) 236 return; 237 p = q = url; 238 239 #define HEXTOINT(x) (x - (isdigit(x) ? '0' : (islower(x) ? 'a' : 'A') - 10)) 240 while (*p) { 241 if (p[0] == '%' 242 && p[1] && isxdigit((unsigned char)p[1]) 243 && p[2] && isxdigit((unsigned char)p[2])) { 244 *q++ = HEXTOINT(p[1]) * 16 + HEXTOINT(p[2]); 245 p+=3; 246 } else 247 *q++ = *p++; 248 } 249 *q = '\0'; 250 } 251 252 253 /* 254 * Parse URL of form: 255 * <type>://[<user>[:<password>@]]<host>[:<port>][/<path>] 256 * Returns -1 if a parse error occurred, otherwise 0. 257 * It's the caller's responsibility to url_decode() the returned 258 * user, pass and path. 259 * 260 * Sets type to url_t, each of the given char ** pointers to a 261 * malloc(3)ed strings of the relevant section, and port to 262 * the number given, or ftpport if ftp://, or httpport if http://. 263 * 264 * If <host> is surrounded by `[' and ']', it's parsed as an 265 * IPv6 address (as per draft-ietf-ipngwg-url-literal-01.txt). 266 * 267 * XXX: this is not totally RFC 1738 compliant; <path> will have the 268 * leading `/' unless it's an ftp:// URL, as this makes things easier 269 * for file:// and http:// URLs. ftp:// URLs have the `/' between the 270 * host and the url-path removed, but any additional leading slashes 271 * in the url-path are retained (because they imply that we should 272 * later do "CWD" with a null argument). 273 * 274 * Examples: 275 * input url output path 276 * --------- ----------- 277 * "ftp://host" NULL 278 * "http://host/" NULL 279 * "file://host/dir/file" "dir/file" 280 * "ftp://host/" "" 281 * "ftp://host//" NULL 282 * "ftp://host//dir/file" "/dir/file" 283 */ 284 static int 285 parse_url(url, desc, type, user, pass, host, port, path) 286 const char *url; 287 const char *desc; 288 url_t *type; 289 char **user; 290 char **pass; 291 char **host; 292 char **port; 293 char **path; 294 { 295 char *cp, *ep, *thost, *tport; 296 size_t len; 297 298 if (url == NULL || desc == NULL || type == NULL || user == NULL 299 || pass == NULL || host == NULL || port == NULL || path == NULL) 300 errx(1, "parse_url: invoked with NULL argument!"); 301 302 *type = UNKNOWN_URL_T; 303 *user = *pass = *host = *port = *path = NULL; 304 tport = NULL; 305 306 if (strncasecmp(url, HTTP_URL, sizeof(HTTP_URL) - 1) == 0) { 307 url += sizeof(HTTP_URL) - 1; 308 *type = HTTP_URL_T; 309 tport = httpport; 310 } else if (strncasecmp(url, FTP_URL, sizeof(FTP_URL) - 1) == 0) { 311 url += sizeof(FTP_URL) - 1; 312 *type = FTP_URL_T; 313 tport = ftpport; 314 } else if (strncasecmp(url, FILE_URL, sizeof(FILE_URL) - 1) == 0) { 315 url += sizeof(FILE_URL) - 1; 316 *type = FILE_URL_T; 317 } else { 318 warnx("Invalid %s `%s'", desc, url); 319 cleanup_parse_url: 320 FREEPTR(*user); 321 FREEPTR(*pass); 322 FREEPTR(*host); 323 FREEPTR(*port); 324 FREEPTR(*path); 325 return (-1); 326 } 327 328 if (*url == '\0') 329 return (0); 330 331 /* find [user[:pass]@]host[:port] */ 332 ep = strchr(url, '/'); 333 if (ep == NULL) 334 thost = xstrdup(url); 335 else { 336 len = ep - url; 337 thost = (char *)xmalloc(len + 1); 338 strncpy(thost, url, len); 339 thost[len] = '\0'; 340 if (*type == FTP_URL_T) /* skip first / for ftp URLs */ 341 ep++; 342 *path = xstrdup(ep); 343 } 344 345 cp = strchr(thost, '@'); /* look for user[:pass]@ in URLs */ 346 if (cp != NULL) { 347 if (*type == FTP_URL_T) 348 anonftp = 0; /* disable anonftp */ 349 *user = thost; 350 *cp = '\0'; 351 thost = xstrdup(cp + 1); 352 cp = strchr(*user, ':'); 353 if (cp != NULL) { 354 *cp = '\0'; 355 *pass = xstrdup(cp + 1); 356 } 357 } 358 359 #ifdef INET6 360 /* 361 * Check if thost is an encoded IPv6 address, as per 362 * draft-ietf-ipngwg-url-literal-01.txt: 363 * `[' ipv6-address ']' 364 */ 365 if (*thost == '[') { 366 cp = thost + 1; 367 if ((ep = strchr(cp, ']')) == NULL || 368 (ep[1] != '\0' && ep[1] != '\0')) { 369 warnx("Invalid address `%s' in %s `%s'", 370 thost, desc, url); 371 goto cleanup_parse_url; 372 } 373 len = ep - cp; /* change `[xxx]' -> `xxx' */ 374 memmove(thost, thost + 1, len); 375 thost[len] = '\0'; 376 if (! isipv6addr(thost)) { 377 warnx("Invalid IPv6 address `%s' in %s `%s'", 378 thost, desc, url); 379 goto cleanup_parse_url; 380 } 381 cp = ep + 1; 382 if (*cp == ':') 383 cp++; 384 else 385 cp = NULL; 386 } else 387 #endif /* INET6 */ 388 if ((cp = strchr(thost, ':')) != NULL) 389 *cp++ = '\0'; 390 *host = thost; 391 392 /* look for [:port] */ 393 if (cp != NULL) { 394 long nport; 395 396 nport = strtol(cp, &ep, 10); 397 if (nport < 1 || nport > MAX_IN_PORT_T || *ep != '\0') { 398 warnx("Invalid port `%s' in %s `%s'", cp, desc, url); 399 goto cleanup_parse_url; 400 } 401 tport = cp; 402 } 403 if (tport != NULL); 404 *port = xstrdup(tport); 405 406 if (debug) 407 fprintf(ttyout, 408 "parse_url: user `%s' pass `%s' host %s:%s path `%s'\n", 409 *user ? *user : "<null>", *pass ? *pass : "<null>", 410 *host ? *host : "<null>", *port ? *port : "<null>", 411 *path ? *path : "<null>"); 412 413 return (0); 414 } 415 416 417 jmp_buf httpabort; 418 419 /* 420 * Retrieve URL, via a proxy if necessary, using HTTP. 421 * If proxyenv is set, use that for the proxy, otherwise try ftp_proxy or 422 * http_proxy as appropriate. 423 * Supports HTTP redirects. 424 * Returns -1 on failure, 0 on completed xfer, 1 if ftp connection 425 * is still open (e.g, ftp xfer with trailing /) 426 */ 427 static int 428 fetch_url(url, proxyenv, proxyauth, wwwauth) 429 const char *url; 430 const char *proxyenv; 431 char *proxyauth; 432 char *wwwauth; 433 { 434 struct addrinfo hints, *res; 435 volatile sig_t oldintr, oldintp; 436 volatile int s; 437 int ischunked, isproxy, rval, hcode; 438 size_t len; 439 char *cp, *ep, *buf, *savefile; 440 char *auth, *location, *message; 441 char *user, *pass, *host, *port, *path, *decodedpath; 442 char *puser, *ppass; 443 off_t hashbytes; 444 int (*closefunc) __P((FILE *)); 445 FILE *fin, *fout; 446 time_t mtime; 447 url_t urltype; 448 in_port_t portnum; 449 int error; 450 451 closefunc = NULL; 452 fin = fout = NULL; 453 s = -1; 454 buf = savefile = NULL; 455 auth = location = message = NULL; 456 ischunked = isproxy = hcode = 0; 457 rval = 1; 458 user = pass = host = path = decodedpath = puser = ppass = NULL; 459 460 #ifdef __GNUC__ /* shut up gcc warnings */ 461 (void)&closefunc; 462 (void)&fin; 463 (void)&fout; 464 (void)&buf; 465 (void)&savefile; 466 (void)&rval; 467 (void)&isproxy; 468 (void)&hcode; 469 (void)&ischunked; 470 (void)&message; 471 (void)&location; 472 (void)&auth; 473 (void)&decodedpath; 474 #endif 475 476 if (parse_url(url, "URL", &urltype, &user, &pass, &host, &port, &path) 477 == -1) 478 goto cleanup_fetch_url; 479 portnum = strtol(port, NULL, 10); 480 481 if (urltype == FILE_URL_T && ! EMPTYSTRING(host) 482 && strcasecmp(host, "localhost") != 0) { 483 warnx("No support for non local file URL `%s'", url); 484 goto cleanup_fetch_url; 485 } 486 487 if (EMPTYSTRING(path)) { 488 if (urltype == FTP_URL_T) { 489 rval = fetch_ftp(url); 490 goto cleanup_fetch_url; 491 } 492 if (urltype != HTTP_URL_T || outfile == NULL) { 493 warnx("Invalid URL (no file after host) `%s'", url); 494 goto cleanup_fetch_url; 495 } 496 } 497 498 decodedpath = xstrdup(path); 499 url_decode(decodedpath); 500 501 if (outfile) 502 savefile = xstrdup(outfile); 503 else { 504 cp = strrchr(decodedpath, '/'); /* find savefile */ 505 if (cp != NULL) 506 savefile = xstrdup(cp + 1); 507 else 508 savefile = xstrdup(decodedpath); 509 } 510 if (EMPTYSTRING(savefile)) { 511 if (urltype == FTP_URL_T) { 512 rval = fetch_ftp(url); 513 goto cleanup_fetch_url; 514 } 515 warnx("Invalid URL (no file after directory) `%s'", url); 516 goto cleanup_fetch_url; 517 } else { 518 if (debug) 519 fprintf(ttyout, "got savefile as `%s'\n", savefile); 520 } 521 522 filesize = -1; 523 mtime = -1; 524 if (urltype == FILE_URL_T) { /* file:// URLs */ 525 struct stat sb; 526 527 direction = "copied"; 528 fin = fopen(decodedpath, "r"); 529 if (fin == NULL) { 530 warn("Cannot open file `%s'", decodedpath); 531 goto cleanup_fetch_url; 532 } 533 if (fstat(fileno(fin), &sb) == 0) { 534 mtime = sb.st_mtime; 535 filesize = sb.st_size; 536 } 537 if (verbose) 538 fprintf(ttyout, "Copying %s\n", decodedpath); 539 } else { /* ftp:// or http:// URLs */ 540 if (proxyenv == NULL) { 541 if (urltype == HTTP_URL_T) 542 proxyenv = httpproxy; 543 else if (urltype == FTP_URL_T) 544 proxyenv = ftpproxy; 545 } 546 direction = "retrieved"; 547 if (proxyenv != NULL) { /* use proxy */ 548 url_t purltype; 549 char *phost, *ppath; 550 char *pport; 551 552 isproxy = 1; 553 554 /* check URL against list of no_proxied sites */ 555 if (no_proxy != NULL) { 556 char *np, *np_copy; 557 long np_port; 558 size_t hlen, plen; 559 560 np_copy = xstrdup(no_proxy); 561 hlen = strlen(host); 562 while ((cp = strsep(&np_copy, " ,")) != NULL) { 563 if (*cp == '\0') 564 continue; 565 if ((np = strrchr(cp, ':')) != NULL) { 566 *np = '\0'; 567 np_port = 568 strtol(np + 1, &ep, 10); 569 if (*ep != '\0') 570 continue; 571 if (portnum != 572 htons((in_port_t)np_port)) 573 continue; 574 } 575 plen = strlen(cp); 576 if (strncasecmp(host + hlen - plen, 577 cp, plen) == 0) { 578 isproxy = 0; 579 break; 580 } 581 } 582 FREEPTR(np_copy); 583 } 584 585 if (isproxy) { 586 if (parse_url(proxyenv, "proxy URL", &purltype, 587 &puser, &ppass, &phost, &pport, &ppath) 588 == -1) 589 goto cleanup_fetch_url; 590 591 if ((purltype != HTTP_URL_T 592 && purltype != FTP_URL_T) || 593 EMPTYSTRING(phost) || 594 (! EMPTYSTRING(ppath) 595 && strcmp(ppath, "/") != 0)) { 596 warnx("Malformed proxy URL `%s'", 597 proxyenv); 598 FREEPTR(phost); 599 FREEPTR(pport); 600 FREEPTR(ppath); 601 goto cleanup_fetch_url; 602 } 603 604 FREEPTR(host); 605 host = phost; 606 FREEPTR(port); 607 port = pport; 608 FREEPTR(path); 609 path = xstrdup(url); 610 FREEPTR(ppath); 611 } 612 } /* proxyenv != NULL */ 613 614 #if 0 615 memset(&sin, 0, sizeof(sin)); 616 sin.sin_family = AF_INET; 617 618 if (isdigit((unsigned char)host[0])) { 619 if (inet_aton(host, &sin.sin_addr) == 0) { 620 warnx("Invalid IP address `%s'", host); 621 goto cleanup_fetch_url; 622 } 623 } else { 624 hp = gethostbyname(host); 625 if (hp == NULL) { 626 warnx("%s: %s", host, hstrerror(h_errno)); 627 goto cleanup_fetch_url; 628 } 629 if (hp->h_addrtype != AF_INET) { 630 warnx("`%s': not an Internet address?", host); 631 goto cleanup_fetch_url; 632 } 633 memcpy(&sin.sin_addr, hp->h_addr, hp->h_length); 634 } 635 636 if (port == NULL) { 637 warnx("Unknown port for URL `%s'", url); 638 goto cleanup_fetch_url; 639 } 640 sin.sin_port = portnum; 641 642 s = socket(AF_INET, SOCK_STREAM, 0); 643 if (s == -1) { 644 warn("Can't create socket"); 645 goto cleanup_fetch_url; 646 } 647 648 while (xconnect(s, (struct sockaddr *)&sin, 649 sizeof(sin)) == -1) { 650 if (errno == EINTR) 651 continue; 652 if (hp && hp->h_addr_list[1]) { 653 int oerrno = errno; 654 char *ia; 655 656 ia = inet_ntoa(sin.sin_addr); 657 errno = oerrno; 658 warn("Connect to address `%s'", ia); 659 hp->h_addr_list++; 660 memcpy(&sin.sin_addr, hp->h_addr_list[0], 661 (size_t)hp->h_length); 662 if (verbose) 663 fprintf(ttyout, "Trying %s...\n", 664 inet_ntoa(sin.sin_addr)); 665 (void)close(s); 666 s = socket(AF_INET, SOCK_STREAM, 0); 667 if (s < 0) { 668 warn("Can't create socket"); 669 goto cleanup_fetch_url; 670 } 671 continue; 672 } 673 warn("Can't connect to `%s'", host); 674 goto cleanup_fetch_url; 675 } 676 #else 677 memset(&hints, 0, sizeof(hints)); 678 hints.ai_flags = AI_CANONNAME; 679 hints.ai_family = AF_UNSPEC; 680 hints.ai_socktype = SOCK_STREAM; 681 hints.ai_protocol = 0; 682 error = getaddrinfo(host, port, &hints, &res); 683 if (error) { 684 warn(gai_strerror(error)); 685 goto cleanup_fetch_url; 686 } 687 if (res->ai_canonname) 688 host = res->ai_canonname; 689 690 while (1) { 691 s = socket(res->ai_family, 692 res->ai_socktype, res->ai_protocol); 693 if (s < 0) { 694 warn("Can't create socket"); 695 goto cleanup_fetch_url; 696 } 697 698 if (xconnect(s, res->ai_addr, res->ai_addrlen) < 0) { 699 char hbuf[MAXHOSTNAMELEN]; 700 getnameinfo(res->ai_addr, res->ai_addrlen, 701 hbuf, sizeof(hbuf), NULL, 0, 702 NI_NUMERICHOST); 703 warn("Connect to address `%s'", hbuf); 704 close(s); 705 res = res->ai_next; 706 if (res) { 707 getnameinfo(res->ai_addr, 708 res->ai_addrlen, hbuf, sizeof(hbuf), 709 NULL, 0, NI_NUMERICHOST); 710 if (verbose) 711 fprintf(ttyout, 712 "Trying %s...\n", hbuf); 713 continue; 714 } 715 warn("Can't connect to %s", host); 716 goto cleanup_fetch_url; 717 } 718 719 break; 720 } 721 #endif 722 723 724 fin = fdopen(s, "r+"); 725 /* 726 * Construct and send the request. 727 * Proxy requests don't want leading /. 728 */ 729 if (isproxy) { 730 if (verbose) 731 fprintf(ttyout, "Requesting %s\n (via %s)\n", 732 url, proxyenv); 733 fprintf(fin, "GET %s HTTP/1.0\r\n", path); 734 if (flushcache) 735 fprintf(fin, "Pragma: no-cache\r\n"); 736 } else { 737 struct utsname unam; 738 739 if (verbose) 740 fprintf(ttyout, "Requesting %s\n", url); 741 fprintf(fin, "GET %s HTTP/1.1\r\n", path); 742 fprintf(fin, "Host: %s:%s\r\n", host, port); 743 fprintf(fin, "Accept: */*\r\n"); 744 if (uname(&unam) != -1) { 745 fprintf(fin, "User-Agent: %s-%s/ftp\r\n", 746 unam.sysname, unam.release); 747 } 748 fprintf(fin, "Connection: close\r\n"); 749 if (flushcache) 750 fprintf(fin, "Cache-Control: no-cache\r\n"); 751 } 752 if (wwwauth) { 753 if (verbose) 754 fprintf(ttyout, " (with authorization)\n"); 755 fprintf(fin, "Authorization: %s\r\n", wwwauth); 756 } 757 if (proxyauth) { 758 if (verbose) 759 fprintf(ttyout, 760 " (with proxy authorization)\n"); 761 fprintf(fin, "Proxy-Authorization: %s\r\n", proxyauth); 762 } 763 fprintf(fin, "\r\n"); 764 if (fflush(fin) == EOF) { 765 warn("Writing HTTP request"); 766 goto cleanup_fetch_url; 767 } 768 769 /* Read the response */ 770 if ((buf = fparseln(fin, &len, NULL, "\0\0\0", 0)) == NULL) { 771 warn("Receiving HTTP reply"); 772 goto cleanup_fetch_url; 773 } 774 while (len > 0 && (buf[len-1] == '\r' || buf[len-1] == '\n')) 775 buf[--len] = '\0'; 776 if (debug) 777 fprintf(ttyout, "received `%s'\n", buf); 778 779 /* Determine HTTP response code */ 780 cp = strchr(buf, ' '); 781 if (cp == NULL) 782 goto improper; 783 else 784 cp++; 785 hcode = strtol(cp, &ep, 10); 786 if (*ep != '\0' && !isspace((unsigned char)*ep)) 787 goto improper; 788 message = xstrdup(cp); 789 790 /* Read the rest of the header. */ 791 FREEPTR(buf); 792 while (1) { 793 if ((buf = fparseln(fin, &len, NULL, "\0\0\0", 0)) 794 == NULL) { 795 warn("Receiving HTTP reply"); 796 goto cleanup_fetch_url; 797 } 798 while (len > 0 && 799 (buf[len-1] == '\r' || buf[len-1] == '\n')) 800 buf[--len] = '\0'; 801 if (len == 0) 802 break; 803 if (debug) 804 fprintf(ttyout, "received `%s'\n", buf); 805 806 /* Look for some headers */ 807 cp = buf; 808 809 #define CONTENTLEN "Content-Length: " 810 if (strncasecmp(cp, CONTENTLEN, 811 sizeof(CONTENTLEN) - 1) == 0) { 812 cp += sizeof(CONTENTLEN) - 1; 813 filesize = strtol(cp, &ep, 10); 814 if (filesize < 1 || *ep != '\0') 815 goto improper; 816 if (debug) 817 fprintf(ttyout, 818 #ifndef NO_QUAD 819 "parsed length as: %qd\n", 820 (long long)filesize); 821 #else 822 "parsed length as: %ld\n", 823 (long)filesize); 824 #endif 825 826 #define LASTMOD "Last-Modified: " 827 } else if (strncasecmp(cp, LASTMOD, 828 sizeof(LASTMOD) - 1) == 0) { 829 struct tm parsed; 830 char *t; 831 832 cp += sizeof(LASTMOD) - 1; 833 /* RFC 1123 */ 834 if ((t = strptime(cp, 835 "%a, %d %b %Y %H:%M:%S GMT", 836 &parsed)) 837 /* RFC 850 */ 838 || (t = strptime(cp, 839 "%a, %d-%b-%y %H:%M:%S GMT", 840 &parsed)) 841 /* asctime */ 842 || (t = strptime(cp, 843 "%a, %b %d %H:%M:%S %Y", 844 &parsed))) { 845 parsed.tm_isdst = -1; 846 if (*t == '\0') 847 mtime = mkgmtime(&parsed); 848 if (debug && mtime != -1) { 849 fprintf(ttyout, 850 "parsed date as: %s", 851 ctime(&mtime)); 852 } 853 } 854 855 #define LOCATION "Location: " 856 } else if (strncasecmp(cp, LOCATION, 857 sizeof(LOCATION) - 1) == 0) { 858 cp += sizeof(LOCATION) - 1; 859 location = xstrdup(cp); 860 if (debug) 861 fprintf(ttyout, 862 "parsed location as: %s\n", cp); 863 864 #define TRANSENC "Transfer-Encoding: " 865 } else if (strncasecmp(cp, TRANSENC, 866 sizeof(TRANSENC) - 1) == 0) { 867 cp += sizeof(TRANSENC) - 1; 868 if (strcasecmp(cp, "chunked") != 0) { 869 warnx( 870 "Unsupported transfer encoding - `%s'", 871 cp); 872 goto cleanup_fetch_url; 873 } 874 ischunked++; 875 if (debug) 876 fprintf(ttyout, 877 "using chunked encoding\n"); 878 879 #define PROXYAUTH "Proxy-Authenticate: " 880 } else if (strncasecmp(cp, PROXYAUTH, 881 sizeof(PROXYAUTH) - 1) == 0) { 882 cp += sizeof(PROXYAUTH) - 1; 883 FREEPTR(auth); 884 auth = xstrdup(cp); 885 if (debug) 886 fprintf(ttyout, 887 "parsed proxy-auth as: %s\n", cp); 888 889 #define WWWAUTH "WWW-Authenticate: " 890 } else if (strncasecmp(cp, WWWAUTH, 891 sizeof(WWWAUTH) - 1) == 0) { 892 cp += sizeof(WWWAUTH) - 1; 893 FREEPTR(auth); 894 auth = xstrdup(cp); 895 if (debug) 896 fprintf(ttyout, 897 "parsed www-auth as: %s\n", cp); 898 899 } 900 901 } 902 /* finished parsing header */ 903 FREEPTR(buf); 904 905 switch (hcode) { 906 case 200: 907 break; 908 case 300: 909 case 301: 910 case 302: 911 case 303: 912 case 305: 913 if (EMPTYSTRING(location)) { 914 warnx( 915 "No redirection Location provided by server"); 916 goto cleanup_fetch_url; 917 } 918 if (redirect_loop++ > 5) { 919 warnx("Too many redirections requested"); 920 goto cleanup_fetch_url; 921 } 922 if (hcode == 305) { 923 if (verbose) 924 fprintf(ttyout, "Redirected via %s\n", 925 location); 926 rval = fetch_url(url, location, 927 proxyauth, wwwauth); 928 } else { 929 if (verbose) 930 fprintf(ttyout, "Redirected to %s\n", 931 location); 932 rval = go_fetch(location); 933 } 934 goto cleanup_fetch_url; 935 case 401: 936 case 407: 937 { 938 char **authp; 939 char *auser, *apass; 940 941 fprintf(ttyout, "%s\n", message); 942 if (EMPTYSTRING(auth)) { 943 warnx( 944 "No authentication challenge provided by server"); 945 goto cleanup_fetch_url; 946 } 947 if (hcode == 401) { 948 authp = &wwwauth; 949 auser = user; 950 apass = pass; 951 } else { 952 authp = &proxyauth; 953 auser = puser; 954 apass = ppass; 955 } 956 if (*authp != NULL) { 957 char reply[10]; 958 959 fprintf(ttyout, 960 "Authorization failed. Retry (y/n)? "); 961 if (fgets(reply, sizeof(reply), stdin) != NULL 962 && tolower(reply[0]) != 'y') 963 goto cleanup_fetch_url; 964 auser = NULL; 965 apass = NULL; 966 } 967 if (auth_url(auth, authp, auser, apass) == 0) { 968 rval = fetch_url(url, proxyenv, 969 proxyauth, wwwauth); 970 memset(*authp, '\0', strlen(*authp)); 971 FREEPTR(*authp); 972 } 973 goto cleanup_fetch_url; 974 } 975 default: 976 if (message) 977 warnx("Error retrieving file - `%s'", message); 978 else 979 warnx("Unknown error retrieving file"); 980 goto cleanup_fetch_url; 981 } 982 } /* end of ftp:// or http:// specific setup */ 983 984 oldintr = oldintp = NULL; 985 986 /* Open the output file. */ 987 if (strcmp(savefile, "-") == 0) { 988 fout = stdout; 989 } else if (*savefile == '|') { 990 oldintp = signal(SIGPIPE, SIG_IGN); 991 fout = popen(savefile + 1, "w"); 992 if (fout == NULL) { 993 warn("Can't run `%s'", savefile + 1); 994 goto cleanup_fetch_url; 995 } 996 closefunc = pclose; 997 } else { 998 fout = fopen(savefile, "w"); 999 if (fout == NULL) { 1000 warn("Can't open `%s'", savefile); 1001 goto cleanup_fetch_url; 1002 } 1003 closefunc = fclose; 1004 } 1005 1006 /* Trap signals */ 1007 if (setjmp(httpabort)) { 1008 if (oldintr) 1009 (void)signal(SIGINT, oldintr); 1010 if (oldintp) 1011 (void)signal(SIGPIPE, oldintp); 1012 goto cleanup_fetch_url; 1013 } 1014 oldintr = signal(SIGINT, aborthttp); 1015 1016 bytes = 0; 1017 hashbytes = mark; 1018 progressmeter(-1); 1019 1020 /* Finally, suck down the file. */ 1021 buf = xmalloc(BUFSIZ + 1); 1022 do { 1023 ssize_t chunksize; 1024 1025 chunksize = 0; 1026 /* read chunksize */ 1027 if (ischunked) { 1028 if (fgets(buf, BUFSIZ, fin) == NULL) { 1029 warnx("Unexpected EOF reading chunksize"); 1030 goto cleanup_fetch_url; 1031 } 1032 chunksize = strtol(buf, &ep, 16); 1033 if (strcmp(ep, "\r\n") != 0) { 1034 warnx("Unexpected data following chunksize"); 1035 goto cleanup_fetch_url; 1036 } 1037 if (debug) 1038 fprintf(ttyout, 1039 #ifndef NO_QUAD 1040 "got chunksize of %qd\n", 1041 (long long)chunksize); 1042 #else 1043 "got chunksize of %ld\n", 1044 (long)chunksize); 1045 #endif 1046 if (chunksize == 0) 1047 break; 1048 } 1049 /* transfer file or chunk */ 1050 while (1) { 1051 struct timeval then, now, td; 1052 off_t bufrem; 1053 1054 (void)gettimeofday(&then, NULL); 1055 bufrem = rate_get ? rate_get : BUFSIZ; 1056 while (bufrem > 0) { 1057 len = fread(buf, sizeof(char), 1058 ischunked ? MIN(chunksize, bufrem) : BUFSIZ, 1059 fin); 1060 if (len <= 0) 1061 goto chunkdone; 1062 bytes += len; 1063 bufrem -= len; 1064 if (fwrite(buf, sizeof(char), len, fout) 1065 != len) { 1066 warn("Writing `%s'", savefile); 1067 goto cleanup_fetch_url; 1068 } 1069 } 1070 if (hash && !progress) { 1071 while (bytes >= hashbytes) { 1072 (void)putc('#', ttyout); 1073 hashbytes += mark; 1074 } 1075 (void)fflush(ttyout); 1076 } 1077 if (ischunked) { 1078 chunksize -= len; 1079 if (chunksize <= 0) 1080 goto chunkdone; 1081 } 1082 if (rate_get) { 1083 while (1) { 1084 (void)gettimeofday(&now, NULL); 1085 timersub(&now, &then, &td); 1086 if (td.tv_sec > 0) 1087 break; 1088 usleep(1000000 - td.tv_usec); 1089 } 1090 } 1091 } 1092 /* read CRLF after chunk*/ 1093 chunkdone: 1094 if (ischunked) { 1095 if (fgets(buf, BUFSIZ, fin) == NULL) 1096 break; 1097 if (strcmp(buf, "\r\n") != 0) { 1098 warnx("Unexpected data following chunk"); 1099 goto cleanup_fetch_url; 1100 } 1101 } 1102 } while (ischunked); 1103 if (hash && !progress && bytes > 0) { 1104 if (bytes < mark) 1105 (void)putc('#', ttyout); 1106 (void)putc('\n', ttyout); 1107 } 1108 if (ferror(fin)) { 1109 warn("Reading file"); 1110 goto cleanup_fetch_url; 1111 } 1112 progressmeter(1); 1113 (void)fflush(fout); 1114 (void)signal(SIGINT, oldintr); 1115 if (oldintp) 1116 (void)signal(SIGPIPE, oldintp); 1117 if (closefunc == fclose && mtime != -1) { 1118 struct timeval tval[2]; 1119 1120 (void)gettimeofday(&tval[0], NULL); 1121 tval[1].tv_sec = mtime; 1122 tval[1].tv_usec = 0; 1123 (*closefunc)(fout); 1124 fout = NULL; 1125 1126 if (utimes(savefile, tval) == -1) { 1127 fprintf(ttyout, 1128 "Can't change modification time to %s", 1129 asctime(localtime(&mtime))); 1130 } 1131 } 1132 if (bytes > 0) 1133 ptransfer(0); 1134 1135 rval = 0; 1136 goto cleanup_fetch_url; 1137 1138 improper: 1139 warnx("Improper response from `%s'", host); 1140 1141 cleanup_fetch_url: 1142 resetsockbufsize(); 1143 if (fin != NULL) 1144 fclose(fin); 1145 else if (s != -1) 1146 close(s); 1147 if (closefunc != NULL && fout != NULL) 1148 (*closefunc)(fout); 1149 FREEPTR(savefile); 1150 FREEPTR(user); 1151 FREEPTR(pass); 1152 FREEPTR(host); 1153 FREEPTR(port); 1154 FREEPTR(path); 1155 FREEPTR(decodedpath); 1156 FREEPTR(puser); 1157 FREEPTR(ppass); 1158 FREEPTR(buf); 1159 FREEPTR(auth); 1160 FREEPTR(location); 1161 FREEPTR(message); 1162 return (rval); 1163 } 1164 1165 /* 1166 * Abort a HTTP retrieval 1167 */ 1168 void 1169 aborthttp(notused) 1170 int notused; 1171 { 1172 1173 alarmtimer(0); 1174 fputs("\nHTTP fetch aborted.\n", ttyout); 1175 longjmp(httpabort, 1); 1176 } 1177 1178 /* 1179 * Retrieve ftp URL or classic ftp argument using FTP. 1180 * Returns 1 on failure, 0 on completed xfer, -1 if ftp connection 1181 * is still open (e.g, ftp xfer with trailing /) 1182 */ 1183 static int 1184 fetch_ftp(url) 1185 const char *url; 1186 { 1187 char *cp, *xargv[5], rempath[MAXPATHLEN]; 1188 char *host, *path, *dir, *file, *user, *pass; 1189 char *port; 1190 int dirhasglob, filehasglob, oautologin, rval, type, xargc; 1191 url_t urltype; 1192 1193 host = path = dir = file = user = pass = NULL; 1194 port = NULL; 1195 rval = 1; 1196 type = TYPE_I; 1197 1198 if (strncasecmp(url, FTP_URL, sizeof(FTP_URL) - 1) == 0) { 1199 if ((parse_url(url, "URL", &urltype, &user, &pass, 1200 &host, &port, &path) == -1) || 1201 (user != NULL && *user == '\0') || 1202 (pass != NULL && *pass == '\0') || 1203 EMPTYSTRING(host)) { 1204 warnx("Invalid URL `%s'", url); 1205 goto cleanup_fetch_ftp; 1206 } 1207 url_decode(user); 1208 url_decode(pass); 1209 /* 1210 * Note: Don't url_decode(path) here. We need to keep the 1211 * distinction between "/" and "%2F" until later. 1212 */ 1213 1214 /* check for trailing ';type=[aid]' */ 1215 if (! EMPTYSTRING(path) && (cp = strrchr(path, ';')) != NULL) { 1216 if (strcasecmp(cp, ";type=a") == 0) 1217 type = TYPE_A; 1218 else if (strcasecmp(cp, ";type=i") == 0) 1219 type = TYPE_I; 1220 else if (strcasecmp(cp, ";type=d") == 0) { 1221 warnx( 1222 "Directory listing via a URL is not supported"); 1223 goto cleanup_fetch_ftp; 1224 } else { 1225 warnx("Invalid suffix `%s' in URL `%s'", cp, 1226 url); 1227 goto cleanup_fetch_ftp; 1228 } 1229 *cp = 0; 1230 } 1231 } else { /* classic style `host:file' */ 1232 urltype = CLASSIC_URL_T; 1233 host = xstrdup(url); 1234 cp = strchr(host, ':'); 1235 if (cp != NULL) { 1236 *cp = '\0'; 1237 path = xstrdup(cp + 1); 1238 } 1239 } 1240 if (EMPTYSTRING(host)) 1241 goto cleanup_fetch_ftp; 1242 1243 /* Extract the file and (if present) directory name. */ 1244 dir = path; 1245 if (! EMPTYSTRING(dir)) { 1246 /* 1247 * If we are dealing with classic `host:path' syntax, 1248 * then a path of the form `/file' (resulting from 1249 * input of the form `host:/file') means that we should 1250 * do "CWD /" before retrieving the file. So we set 1251 * dir="/" and file="file". 1252 * 1253 * But if we are dealing with URLs like 1254 * `ftp://host/path' then a path of the form `/file' 1255 * (resulting from a URL of the form `ftp://host//file') 1256 * means that we should do `CWD ' (with an empty 1257 * argument) before retrieving the file. So we set 1258 * dir="" and file="file". 1259 * 1260 * If the path does not contain / at all, we set 1261 * dir=NULL. (We get a path without any slashes if 1262 * we are dealing with classic `host:file' or URL 1263 * `ftp://host/file'.) 1264 * 1265 * In all other cases, we set dir to a string that does 1266 * not include the final '/' that separates the dir part 1267 * from the file part of the path. (This will be the 1268 * empty string if and only if we are dealing with a 1269 * path of the form `/file' resulting from an URL of the 1270 * form `ftp://host//file'.) 1271 */ 1272 cp = strrchr(dir, '/'); 1273 if (cp == dir && urltype == CLASSIC_URL_T) { 1274 file = cp + 1; 1275 dir = "/"; 1276 } else if (cp != NULL) { 1277 *cp++ = '\0'; 1278 file = cp; 1279 } else { 1280 file = dir; 1281 dir = NULL; 1282 } 1283 } else 1284 dir = NULL; 1285 if (urltype == FTP_URL_T && file != NULL) { 1286 url_decode(file); 1287 /* but still don't url_decode(dir) */ 1288 } 1289 if (debug) 1290 fprintf(ttyout, 1291 "fetch_ftp: user `%s' pass `%s' host %s:%s path `%s' dir `%s' file `%s'\n", 1292 user ? user : "<null>", pass ? pass : "<null>", 1293 host ? host : "<null>", port ? port : "<null>", 1294 path ? path : "<null>", 1295 dir ? dir : "<null>", file ? file : "<null>"); 1296 1297 dirhasglob = filehasglob = 0; 1298 if (doglob && urltype == CLASSIC_URL_T) { 1299 if (! EMPTYSTRING(dir) && strpbrk(dir, "*?[]{}") != NULL) 1300 dirhasglob = 1; 1301 if (! EMPTYSTRING(file) && strpbrk(file, "*?[]{}") != NULL) 1302 filehasglob = 1; 1303 } 1304 1305 /* Set up the connection */ 1306 if (connected) 1307 disconnect(0, NULL); 1308 xargv[0] = __progname; 1309 xargv[1] = host; 1310 xargv[2] = NULL; 1311 xargc = 2; 1312 if (port) { 1313 xargv[2] = port; 1314 xargv[3] = NULL; 1315 xargc = 3; 1316 } 1317 oautologin = autologin; 1318 if (user != NULL) 1319 autologin = 0; 1320 setpeer(xargc, xargv); 1321 autologin = oautologin; 1322 if ((connected == 0) || ((connected == 1) 1323 && !ftp_login(host, user, pass))) { 1324 warnx("Can't connect or login to host `%s'", host); 1325 goto cleanup_fetch_ftp; 1326 } 1327 1328 switch (type) { 1329 case TYPE_A: 1330 setascii(0, NULL); 1331 break; 1332 case TYPE_I: 1333 setbinary(0, NULL); 1334 break; 1335 default: 1336 errx(1, "fetch_ftp: unknown transfer type %d\n", type); 1337 } 1338 1339 /* 1340 * Change directories, if necessary. 1341 * 1342 * Note: don't use EMPTYSTRING(dir) below, because 1343 * dir=="" means something different from dir==NULL. 1344 */ 1345 if (dir != NULL && !dirhasglob) { 1346 char *nextpart; 1347 1348 /* 1349 * If we are dealing with a classic `host:path' (urltype 1350 * is CLASSIC_URL_T) then we have a raw directory 1351 * name (not encoded in any way) and we can change 1352 * directories in one step. 1353 * 1354 * If we are dealing with an `ftp://host/path' URL 1355 * (urltype is FTP_URL_T), then RFC 1738 says we need to 1356 * send a separate CWD command for each unescaped "/" 1357 * in the path, and we have to interpret %hex escaping 1358 * *after* we find the slashes. It's possible to get 1359 * empty components here, (from multiple adjacent 1360 * slashes in the path) and RFC 1738 says that we should 1361 * still do `CWD ' (with a null argument) in such cases. 1362 * 1363 * Many ftp servers don't support `CWD ', so if there's an 1364 * error performing that command, bail out with a descriptive 1365 * message. 1366 * 1367 * Examples: 1368 * 1369 * host: dir="", urltype=CLASSIC_URL_T 1370 * logged in (to default directory) 1371 * host:file dir=NULL, urltype=CLASSIC_URL_T 1372 * "RETR file" 1373 * host:dir/ dir="dir", urltype=CLASSIC_URL_T 1374 * "CWD dir", logged in 1375 * ftp://host/ dir="", urltype=FTP_URL_T 1376 * logged in (to default directory) 1377 * ftp://host/dir/ dir="dir", urltype=FTP_URL_T 1378 * "CWD dir", logged in 1379 * ftp://host/file dir=NULL, urltype=FTP_URL_T 1380 * "RETR file" 1381 * ftp://host//file dir="", urltype=FTP_URL_T 1382 * "CWD ", "RETR file" 1383 * host:/file dir="/", urltype=CLASSIC_URL_T 1384 * "CWD /", "RETR file" 1385 * ftp://host///file dir="/", urltype=FTP_URL_T 1386 * "CWD ", "CWD ", "RETR file" 1387 * ftp://host/%2F/file dir="%2F", urltype=FTP_URL_T 1388 * "CWD /", "RETR file" 1389 * ftp://host/foo/file dir="foo", urltype=FTP_URL_T 1390 * "CWD foo", "RETR file" 1391 * ftp://host/foo/bar/file dir="foo/bar" 1392 * "CWD foo", "CWD bar", "RETR file" 1393 * ftp://host//foo/bar/file dir="/foo/bar" 1394 * "CWD ", "CWD foo", "CWD bar", "RETR file" 1395 * ftp://host/foo//bar/file dir="foo//bar" 1396 * "CWD foo", "CWD ", "CWD bar", "RETR file" 1397 * ftp://host/%2F/foo/bar/file dir="%2F/foo/bar" 1398 * "CWD /", "CWD foo", "CWD bar", "RETR file" 1399 * ftp://host/%2Ffoo/bar/file dir="%2Ffoo/bar" 1400 * "CWD /foo", "CWD bar", "RETR file" 1401 * ftp://host/%2Ffoo%2Fbar/file dir="%2Ffoo%2Fbar" 1402 * "CWD /foo/bar", "RETR file" 1403 * ftp://host/%2Ffoo%2Fbar%2Ffile dir=NULL 1404 * "RETR /foo/bar/file" 1405 * 1406 * Note that we don't need `dir' after this point. 1407 */ 1408 do { 1409 if (urltype == FTP_URL_T) { 1410 nextpart = strchr(dir, '/'); 1411 if (nextpart) { 1412 *nextpart = '\0'; 1413 nextpart++; 1414 } 1415 url_decode(dir); 1416 } else 1417 nextpart = NULL; 1418 if (debug) 1419 fprintf(ttyout, "dir `%s', nextpart `%s'\n", 1420 dir ? dir : "<null>", 1421 nextpart ? nextpart : "<null>"); 1422 if (urltype == FTP_URL_T || *dir != '\0') { 1423 xargv[0] = "cd"; 1424 xargv[1] = dir; 1425 xargv[2] = NULL; 1426 dirchange = 0; 1427 cd(2, xargv); 1428 if (! dirchange) { 1429 if (*dir == '\0' && code == 500) 1430 fprintf(stderr, 1431 "\n" 1432 "ftp: The `CWD ' command (without a directory), which is required by\n" 1433 " RFC 1738 to support the empty directory in the URL pathname (`//'),\n" 1434 " conflicts with the server's conformance to RFC 959.\n" 1435 " Try the same URL without the `//' in the URL pathname.\n" 1436 "\n"); 1437 goto cleanup_fetch_ftp; 1438 } 1439 } 1440 dir = nextpart; 1441 } while (dir != NULL); 1442 } 1443 1444 if (EMPTYSTRING(file)) { 1445 rval = -1; 1446 goto cleanup_fetch_ftp; 1447 } 1448 1449 if (dirhasglob) { 1450 snprintf(rempath, sizeof(rempath), "%s/%s", dir, file); 1451 file = rempath; 1452 } 1453 1454 /* Fetch the file(s). */ 1455 xargc = 2; 1456 xargv[0] = "get"; 1457 xargv[1] = file; 1458 xargv[2] = NULL; 1459 if (dirhasglob || filehasglob) { 1460 int ointeractive; 1461 1462 ointeractive = interactive; 1463 interactive = 0; 1464 xargv[0] = "mget"; 1465 mget(xargc, xargv); 1466 interactive = ointeractive; 1467 } else { 1468 if (outfile == NULL) { 1469 cp = strrchr(file, '/'); /* find savefile */ 1470 if (cp != NULL) 1471 outfile = cp + 1; 1472 else 1473 outfile = file; 1474 } 1475 xargv[2] = (char *)outfile; 1476 xargv[3] = NULL; 1477 xargc++; 1478 if (restartautofetch) 1479 reget(xargc, xargv); 1480 else 1481 get(xargc, xargv); 1482 } 1483 1484 if ((code / 100) == COMPLETE) 1485 rval = 0; 1486 1487 cleanup_fetch_ftp: 1488 FREEPTR(host); 1489 FREEPTR(path); 1490 FREEPTR(user); 1491 FREEPTR(pass); 1492 return (rval); 1493 } 1494 1495 /* 1496 * Retrieve the given file to outfile. 1497 * Supports arguments of the form: 1498 * "host:path", "ftp://host/path" if $ftpproxy, call fetch_url() else 1499 * call fetch_ftp() 1500 * "http://host/path" call fetch_url() to use HTTP 1501 * "file:///path" call fetch_url() to copy 1502 * "about:..." print a message 1503 * 1504 * Returns 1 on failure, 0 on completed xfer, -1 if ftp connection 1505 * is still open (e.g, ftp xfer with trailing /) 1506 */ 1507 static int 1508 go_fetch(url) 1509 const char *url; 1510 { 1511 1512 #ifndef NO_ABOUT 1513 /* 1514 * Check for about:* 1515 */ 1516 if (strncasecmp(url, ABOUT_URL, sizeof(ABOUT_URL) - 1) == 0) { 1517 url += sizeof(ABOUT_URL) -1; 1518 if (strcasecmp(url, "ftp") == 0) { 1519 fprintf(ttyout, "%s\n%s\n", 1520 "This version of ftp has been enhanced by Luke Mewburn <lukem (at) netbsd.org>.", 1521 "Execute `man ftp' for more details"); 1522 } else if (strcasecmp(url, "netbsd") == 0) { 1523 fprintf(ttyout, "%s\n%s\n", 1524 "NetBSD is a freely available and redistributable UNIX-like operating system.", 1525 "For more information, see http://www.netbsd.org/index.html"); 1526 } else { 1527 fprintf(ttyout, "`%s' is an interesting topic.\n", url); 1528 } 1529 return (0); 1530 } 1531 #endif /* NO_ABOUT */ 1532 1533 /* 1534 * Check for file:// and http:// URLs. 1535 */ 1536 if (strncasecmp(url, HTTP_URL, sizeof(HTTP_URL) - 1) == 0 || 1537 strncasecmp(url, FILE_URL, sizeof(FILE_URL) - 1) == 0) 1538 return (fetch_url(url, NULL, NULL, NULL)); 1539 1540 /* 1541 * Try FTP URL-style and host:file arguments next. 1542 * If ftpproxy is set with an FTP URL, use fetch_url() 1543 * Othewise, use fetch_ftp(). 1544 */ 1545 if (ftpproxy && strncasecmp(url, FTP_URL, sizeof(FTP_URL) - 1) == 0) 1546 return (fetch_url(url, NULL, NULL, NULL)); 1547 1548 return (fetch_ftp(url)); 1549 } 1550 1551 /* 1552 * Retrieve multiple files from the command line, 1553 * calling go_fetch() for each file. 1554 * 1555 * If an ftp path has a trailing "/", the path will be cd-ed into and 1556 * the connection remains open, and the function will return -1 1557 * (to indicate the connection is alive). 1558 * If an error occurs the return value will be the offset+1 in 1559 * argv[] of the file that caused a problem (i.e, argv[x] 1560 * returns x+1) 1561 * Otherwise, 0 is returned if all files retrieved successfully. 1562 */ 1563 int 1564 auto_fetch(argc, argv) 1565 int argc; 1566 char *argv[]; 1567 { 1568 volatile int argpos; 1569 int rval; 1570 1571 argpos = 0; 1572 1573 if (setjmp(toplevel)) { 1574 if (connected) 1575 disconnect(0, NULL); 1576 return (argpos + 1); 1577 } 1578 (void)signal(SIGINT, (sig_t)intr); 1579 (void)signal(SIGPIPE, (sig_t)lostpeer); 1580 1581 /* 1582 * Loop through as long as there's files to fetch. 1583 */ 1584 for (rval = 0; (rval == 0) && (argpos < argc); argpos++) { 1585 if (strchr(argv[argpos], ':') == NULL) 1586 break; 1587 redirect_loop = 0; 1588 anonftp = 1; /* Handle "automatic" transfers. */ 1589 rval = go_fetch(argv[argpos]); 1590 if (outfile != NULL && strcmp(outfile, "-") != 0 1591 && outfile[0] != '|') 1592 outfile = NULL; 1593 if (rval > 0) 1594 rval = argpos + 1; 1595 } 1596 1597 if (connected && rval != -1) 1598 disconnect(0, NULL); 1599 return (rval); 1600 } 1601
Indexes created Mon Sep 22 05:09:51 GMT 2025