1 /* $OpenBSD: fetch.c,v 1.49 2004/02/28 20:08:38 krw Exp $ */ 2 /* $NetBSD: fetch.c,v 1.14 1997/08/18 10:20:20 lukem Exp $ */ 3 4 /*- 5 * Copyright (c) 1997 The NetBSD Foundation, Inc. 6 * All rights reserved. 7 * 8 * This code is derived from software contributed to The NetBSD Foundation 9 * by Jason Thorpe and Luke Mewburn. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. All advertising materials mentioning features or use of this software 20 * must display the following acknowledgement: 21 * This product includes software developed by the NetBSD 22 * Foundation, Inc. and its contributors. 23 * 4. Neither the name of The NetBSD Foundation nor the names of its 24 * contributors may be used to endorse or promote products derived 25 * from this software without specific prior written permission. 26 * 27 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 28 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 29 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 30 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 31 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 32 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 33 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 34 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 35 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 36 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 37 * POSSIBILITY OF SUCH DAMAGE. 38 */ 39 40 #if !defined(lint) && !defined(SMALL) 41 static char rcsid[] = "$OpenBSD: fetch.c,v 1.49 2004/02/28 20:08:38 krw Exp $"; 42 #endif /* not lint and not SMALL */ 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 53 #include <netinet/in.h> 54 55 #include <arpa/ftp.h> 56 #include <arpa/inet.h> 57 58 #include <ctype.h> 59 #include <err.h> 60 #include <libgen.h> 61 #include <netdb.h> 62 #include <fcntl.h> 63 #include <signal.h> 64 #include <stdio.h> 65 #include <errno.h> 66 #include <stdlib.h> 67 #include <string.h> 68 #include <unistd.h> 69 #include <util.h> 70 71 #include "ftp_var.h" 72 73 static int url_get(const char *, const char *, const char *); 74 void aborthttp(int); 75 void abortfile(int); 76 char hextochar(const char *); 77 char *urldecode(const char *); 78 79 #define FTP_URL "ftp://" /* ftp URL prefix */ 80 #define HTTP_URL "http://" /* http URL prefix */ 81 #define FILE_URL "file:" /* file URL prefix */ 82 #define FTP_PROXY "ftp_proxy" /* env var with ftp proxy location */ 83 #define HTTP_PROXY "http_proxy" /* env var with http proxy location */ 84 85 86 #define EMPTYSTRING(x) ((x) == NULL || (*(x) == '\0')) 87 88 static const char *at_encoding_warning = 89 "Extra `@' characters in usernames and passwords should be encoded as %%40"; 90 91 jmp_buf httpabort; 92 93 /* 94 * Retrieve URL, via the proxy in $proxyvar if necessary. 95 * Modifies the string argument given. 96 * Returns -1 on failure, 0 on success 97 */ 98 static int 99 url_get(origline, proxyenv, outfile) 100 const char *origline; 101 const char *proxyenv; 102 const char *outfile; 103 { 104 struct addrinfo hints, *res0, *res; 105 int error; 106 int i, isftpurl, isfileurl, isredirect; 107 volatile int s, out; 108 size_t len; 109 char *cp, *ep, *portnum, *path; 110 char pbuf[NI_MAXSERV], hbuf[NI_MAXHOST]; 111 const char * volatile savefile; 112 char *line, *host, *port, *buf; 113 char * volatile proxy; 114 char *hosttail; 115 volatile sig_t oldintr; 116 off_t hashbytes; 117 char *cause = "unknown"; 118 FILE *fin; 119 int rval; 120 121 s = -1; 122 proxy = NULL; 123 fin = NULL; 124 buf = NULL; 125 isftpurl = 0; 126 isfileurl = 0; 127 isredirect = 0; 128 rval = -1; 129 130 line = strdup(origline); 131 if (line == NULL) 132 errx(1, "Can't allocate memory to parse URL"); 133 if (strncasecmp(line, HTTP_URL, sizeof(HTTP_URL) - 1) == 0) 134 host = line + sizeof(HTTP_URL) - 1; 135 else if (strncasecmp(line, FTP_URL, sizeof(FTP_URL) - 1) == 0) { 136 host = line + sizeof(FTP_URL) - 1; 137 isftpurl = 1; 138 } else if (strncasecmp(line, FILE_URL, sizeof(FILE_URL) - 1) == 0) { 139 host = line + sizeof(FILE_URL) - 1; 140 isfileurl = 1; 141 } else 142 errx(1, "url_get: Invalid URL '%s'", line); 143 144 if (isfileurl) { 145 path = host; 146 } else { 147 path = strchr(host, '/'); /* find path */ 148 if (EMPTYSTRING(path)) { 149 if (isftpurl) 150 goto noftpautologin; 151 warnx("Invalid URL (no `/' after host): %s", origline); 152 goto cleanup_url_get; 153 } 154 *path++ = '\0'; 155 if (EMPTYSTRING(path)) { 156 if (isftpurl) 157 goto noftpautologin; 158 warnx("Invalid URL (no file after host): %s", origline); 159 goto cleanup_url_get; 160 } 161 } 162 163 if (outfile) 164 savefile = outfile; 165 else 166 savefile = basename(path); 167 168 if (EMPTYSTRING(savefile)) { 169 if (isftpurl) 170 goto noftpautologin; 171 warnx("Invalid URL (no file after directory): %s", origline); 172 goto cleanup_url_get; 173 } 174 175 if (proxyenv != NULL) { /* use proxy */ 176 proxy = strdup(proxyenv); 177 if (proxy == NULL) 178 errx(1, "Can't allocate memory for proxy URL."); 179 if (strncasecmp(proxy, HTTP_URL, sizeof(HTTP_URL) - 1) == 0) 180 host = proxy + sizeof(HTTP_URL) - 1; 181 else if (strncasecmp(proxy, FTP_URL, sizeof(FTP_URL) - 1) == 0) 182 host = proxy + sizeof(FTP_URL) - 1; 183 else { 184 warnx("Malformed proxy URL: %s", proxyenv); 185 goto cleanup_url_get; 186 } 187 if (EMPTYSTRING(host)) { 188 warnx("Malformed proxy URL: %s", proxyenv); 189 goto cleanup_url_get; 190 } 191 *--path = '/'; /* add / back to real path */ 192 path = strchr(host, '/'); /* remove trailing / on host */ 193 if (!EMPTYSTRING(path)) 194 *path++ = '\0'; 195 path = line; 196 } 197 198 if (isfileurl) { 199 struct stat st; 200 201 s = open(path, O_RDONLY); 202 if (s == -1) { 203 warn("Can't open file %s", path); 204 goto cleanup_url_get; 205 } 206 207 if (fstat(s, &st) == -1) 208 filesize = -1; 209 else 210 filesize = st.st_size; 211 212 /* Open the output file. */ 213 if (strcmp(savefile, "-") != 0) { 214 out = open(savefile, O_CREAT | O_WRONLY | O_TRUNC, 0666); 215 if (out < 0) { 216 warn("Can't open %s", savefile); 217 goto cleanup_url_get; 218 } 219 } else 220 out = fileno(stdout); 221 222 /* Trap signals */ 223 oldintr = NULL; 224 if (setjmp(httpabort)) { 225 if (oldintr) 226 (void)signal(SIGINT, oldintr); 227 goto cleanup_url_get; 228 } 229 oldintr = signal(SIGINT, abortfile); 230 231 bytes = 0; 232 hashbytes = mark; 233 progressmeter(-1); 234 235 if ((buf = malloc(4096)) == NULL) 236 errx(1, "Can't allocate memory for transfer buffer"); 237 238 /* Finally, suck down the file. */ 239 i = 0; 240 while ((len = read(s, buf, 4096)) > 0) { 241 bytes += len; 242 for (cp = buf; len > 0; len -= i, cp += i) { 243 if ((i = write(out, cp, len)) == -1) { 244 warn("Writing %s", savefile); 245 goto cleanup_url_get; 246 } 247 else if (i == 0) 248 break; 249 } 250 if (hash && !progress) { 251 while (bytes >= hashbytes) { 252 (void)putc('#', ttyout); 253 hashbytes += mark; 254 } 255 (void)fflush(ttyout); 256 } 257 } 258 if (hash && !progress && bytes > 0) { 259 if (bytes < mark) 260 (void)putc('#', ttyout); 261 (void)putc('\n', ttyout); 262 (void)fflush(ttyout); 263 } 264 if (len != 0) { 265 warn("Reading from file"); 266 goto cleanup_url_get; 267 } 268 progressmeter(1); 269 if (verbose) 270 fputs("Successfully retrieved file.\n", ttyout); 271 (void)signal(SIGINT, oldintr); 272 273 rval = 0; 274 goto cleanup_url_get; 275 } 276 277 if (*host == '[' && (hosttail = strrchr(host, ']')) != NULL && 278 (hosttail[1] == '\0' || hosttail[1] == ':')) { 279 host++; 280 *hosttail++ = '\0'; 281 } else 282 hosttail = host; 283 284 portnum = strrchr(hosttail, ':'); /* find portnum */ 285 if (portnum != NULL) 286 *portnum++ = '\0'; 287 288 if (debug) 289 fprintf(ttyout, "host %s, port %s, path %s, save as %s.\n", 290 host, portnum, path, savefile); 291 292 memset(&hints, 0, sizeof(hints)); 293 hints.ai_family = family; 294 hints.ai_socktype = SOCK_STREAM; 295 port = portnum ? portnum : httpport; 296 error = getaddrinfo(host, port, &hints, &res0); 297 if (error == EAI_SERVICE && port == httpport) { 298 /* 299 * If the services file is corrupt/missing, fall back 300 * on our hard-coded defines. 301 */ 302 snprintf(pbuf, sizeof(pbuf), "%d", HTTP_PORT); 303 error = getaddrinfo(host, pbuf, &hints, &res0); 304 } 305 if (error) { 306 warnx("%s: %s", gai_strerror(error), host); 307 goto cleanup_url_get; 308 } 309 310 s = -1; 311 for (res = res0; res; res = res->ai_next) { 312 if (getnameinfo(res->ai_addr, res->ai_addrlen, hbuf, 313 sizeof(hbuf), NULL, 0, NI_NUMERICHOST) != 0) 314 strlcpy(hbuf, "(unknown)", sizeof(hbuf)); 315 if (verbose) 316 fprintf(ttyout, "Trying %s...\n", hbuf); 317 318 s = socket(res->ai_family, res->ai_socktype, res->ai_protocol); 319 if (s == -1) { 320 cause = "socket"; 321 continue; 322 } 323 324 again: 325 if (connect(s, res->ai_addr, res->ai_addrlen) < 0) { 326 if (errno == EINTR) 327 goto again; 328 close(s); 329 s = -1; 330 cause = "connect"; 331 continue; 332 } 333 334 /* get port in numeric */ 335 if (getnameinfo(res->ai_addr, res->ai_addrlen, NULL, 0, 336 pbuf, sizeof(pbuf), NI_NUMERICSERV) == 0) 337 port = pbuf; 338 else 339 port = NULL; 340 341 break; 342 } 343 freeaddrinfo(res0); 344 if (s < 0) { 345 warn("%s", cause); 346 goto cleanup_url_get; 347 } 348 349 fin = fdopen(s, "r+"); 350 351 /* 352 * Construct and send the request. Proxy requests don't want leading /. 353 */ 354 if (proxy) { 355 /* 356 * Host: directive must use the destination host address for 357 * the original URI (path). We do not attach it at this moment. 358 */ 359 if (verbose) 360 fprintf(ttyout, "Requesting %s (via %s)\n", 361 origline, proxyenv); 362 fprintf(fin, "GET %s HTTP/1.0\r\n%s\r\n\r\n", path, HTTP_USER_AGENT); 363 } else { 364 if (verbose) 365 fprintf(ttyout, "Requesting %s\n", origline); 366 if (strchr(host, ':')) { 367 char *h, *p; 368 369 /* strip off scoped address portion, since it's local to node */ 370 h = strdup(host); 371 if (h == NULL) 372 errx(1, "Can't allocate memory."); 373 if ((p = strchr(h, '%')) != NULL) 374 *p = '\0'; 375 /* 376 * Send port number only if it's specified and does not equal 377 * 80. Some broken HTTP servers get confused if you explicitly 378 * send them the port number. 379 */ 380 if (port && strcmp(port, "80") != 0) 381 fprintf(fin, 382 "GET /%s HTTP/1.0\r\nHost: [%s]:%s\r\n%s\r\n\r\n", 383 path, h, port, HTTP_USER_AGENT); 384 else 385 fprintf(fin, 386 "GET /%s HTTP/1.0\r\nHost: [%s]\r\n%s\r\n\r\n", 387 path, h, HTTP_USER_AGENT); 388 free(h); 389 } else { 390 if (port && strcmp(port, "80") != 0) 391 fprintf(fin, 392 "GET /%s HTTP/1.0\r\nHost: %s:%s\r\n%s\r\n\r\n", 393 path, host, port, HTTP_USER_AGENT); 394 else 395 fprintf(fin, 396 "GET /%s HTTP/1.0\r\nHost: %s\r\n%s\r\n\r\n", 397 path, host, HTTP_USER_AGENT); 398 } 399 } 400 if (fflush(fin) == EOF) { 401 warn("Writing HTTP request"); 402 goto cleanup_url_get; 403 } 404 405 if ((buf = fparseln(fin, &len, NULL, "\0\0\0", 0)) == NULL) { 406 warn("Receiving HTTP reply"); 407 goto cleanup_url_get; 408 } 409 410 while (len > 0 && (buf[len-1] == '\r' || buf[len-1] == '\n')) 411 buf[--len] = '\0'; 412 if (debug) 413 fprintf(ttyout, "received '%s'\n", buf); 414 415 cp = strchr(buf, ' '); 416 if (cp == NULL) 417 goto improper; 418 else 419 cp++; 420 if (strncmp(cp, "301", 3) == 0 || strncmp(cp, "302", 3) == 0) { 421 isredirect++; 422 } else if (strncmp(cp, "200", 3)) { 423 warnx("Error retrieving file: %s", cp); 424 goto cleanup_url_get; 425 } 426 427 /* 428 * Read the rest of the header. 429 */ 430 free(buf); 431 filesize = -1; 432 433 while (1) { 434 if ((buf = fparseln(fin, &len, NULL, "\0\0\0", 0)) == NULL) { 435 warn("Receiving HTTP reply"); 436 goto cleanup_url_get; 437 } 438 while (len > 0 && (buf[len-1] == '\r' || buf[len-1] == '\n')) 439 buf[--len] = '\0'; 440 if (len == 0) 441 break; 442 if (debug) 443 fprintf(ttyout, "received '%s'\n", buf); 444 445 /* Look for some headers */ 446 cp = buf; 447 #define CONTENTLEN "Content-Length: " 448 if (strncasecmp(cp, CONTENTLEN, sizeof(CONTENTLEN) - 1) == 0) { 449 cp += sizeof(CONTENTLEN) - 1; 450 filesize = strtol(cp, &ep, 10); 451 if (filesize < 1 || *ep != '\0') 452 goto improper; 453 #define LOCATION "Location: " 454 } else if (isredirect && 455 strncasecmp(cp, LOCATION, sizeof(LOCATION) - 1) == 0) { 456 cp += sizeof(LOCATION) - 1; 457 if (verbose) 458 fprintf(ttyout, "Redirected to %s\n", cp); 459 if (fin != NULL) 460 fclose(fin); 461 else if (s != -1) 462 close(s); 463 if (proxy) 464 free(proxy); 465 free(line); 466 rval = url_get(cp, proxyenv, outfile); 467 if (buf) 468 free(buf); 469 return (rval); 470 } 471 } 472 473 /* Open the output file. */ 474 if (strcmp(savefile, "-") != 0) { 475 out = open(savefile, O_CREAT | O_WRONLY | O_TRUNC, 0666); 476 if (out < 0) { 477 warn("Can't open %s", savefile); 478 goto cleanup_url_get; 479 } 480 } else 481 out = fileno(stdout); 482 483 /* Trap signals */ 484 oldintr = NULL; 485 if (setjmp(httpabort)) { 486 if (oldintr) 487 (void)signal(SIGINT, oldintr); 488 goto cleanup_url_get; 489 } 490 oldintr = signal(SIGINT, aborthttp); 491 492 bytes = 0; 493 hashbytes = mark; 494 progressmeter(-1); 495 496 free(buf); 497 498 /* Finally, suck down the file. */ 499 if ((buf = malloc(4096)) == NULL) 500 errx(1, "Can't allocate memory for transfer buffer"); 501 i = 0; 502 while ((len = fread(buf, sizeof(char), 4096, fin)) > 0) { 503 bytes += len; 504 for (cp = buf; len > 0; len -= i, cp += i) { 505 if ((i = write(out, cp, len)) == -1) { 506 warn("Writing %s", savefile); 507 goto cleanup_url_get; 508 } 509 else if (i == 0) 510 break; 511 } 512 if (hash && !progress) { 513 while (bytes >= hashbytes) { 514 (void)putc('#', ttyout); 515 hashbytes += mark; 516 } 517 (void)fflush(ttyout); 518 } 519 } 520 if (hash && !progress && bytes > 0) { 521 if (bytes < mark) 522 (void)putc('#', ttyout); 523 (void)putc('\n', ttyout); 524 (void)fflush(ttyout); 525 } 526 if (len != 0) { 527 warn("Reading from socket"); 528 goto cleanup_url_get; 529 } 530 progressmeter(1); 531 if (filesize != -1 && len == 0 && bytes != filesize) { 532 if (verbose) 533 fputs("Read short file.\n", ttyout); 534 goto cleanup_url_get; 535 } 536 537 if (verbose) 538 fputs("Successfully retrieved file.\n", ttyout); 539 (void)signal(SIGINT, oldintr); 540 541 rval = 0; 542 goto cleanup_url_get; 543 544 noftpautologin: 545 warnx( 546 "Auto-login using ftp URLs isn't supported when using $ftp_proxy"); 547 goto cleanup_url_get; 548 549 improper: 550 warnx("Improper response from %s", host); 551 552 cleanup_url_get: 553 if (fin != NULL) 554 fclose(fin); 555 else if (s != -1) 556 close(s); 557 if (buf) 558 free(buf); 559 if (proxy) 560 free(proxy); 561 free(line); 562 return (rval); 563 } 564 565 /* 566 * Abort a http retrieval 567 */ 568 void 569 aborthttp(notused) 570 int notused; 571 { 572 573 alarmtimer(0); 574 fputs("\nhttp fetch aborted.\n", ttyout); 575 (void)fflush(ttyout); 576 longjmp(httpabort, 1); 577 } 578 579 /* 580 * Abort a http retrieval 581 */ 582 void 583 abortfile(notused) 584 int notused; 585 { 586 587 alarmtimer(0); 588 fputs("\nfile fetch aborted.\n", ttyout); 589 (void)fflush(ttyout); 590 longjmp(httpabort, 1); 591 } 592 593 /* 594 * Retrieve multiple files from the command line, transferring 595 * files of the form "host:path", "ftp://host/path" using the 596 * ftp protocol, and files of the form "http://host/path" using 597 * the http protocol. 598 * If path has a trailing "/", then return (-1); 599 * the path will be cd-ed into and the connection remains open, 600 * and the function will return -1 (to indicate the connection 601 * is alive). 602 * If an error occurs the return value will be the offset+1 in 603 * argv[] of the file that caused a problem (i.e, argv[x] 604 * returns x+1) 605 * Otherwise, 0 is returned if all files retrieved successfully. 606 */ 607 int 608 auto_fetch(argc, argv, outfile) 609 int argc; 610 char *argv[]; 611 char *outfile; 612 { 613 char *xargv[5]; 614 char *cp, *line, *host, *dir, *file, *portnum; 615 char *user, *pass; 616 char *ftpproxy, *httpproxy; 617 int rval, xargc; 618 volatile int argpos; 619 int dirhasglob, filehasglob, oautologin; 620 char rempath[MAXPATHLEN]; 621 622 argpos = 0; 623 624 if (setjmp(toplevel)) { 625 if (connected) 626 disconnect(0, NULL); 627 return (argpos + 1); 628 } 629 (void)signal(SIGINT, (sig_t)intr); 630 (void)signal(SIGPIPE, (sig_t)lostpeer); 631 632 if ((ftpproxy = getenv(FTP_PROXY)) != NULL && *ftpproxy == '\0') 633 ftpproxy = NULL; 634 if ((httpproxy = getenv(HTTP_PROXY)) != NULL && *httpproxy == '\0') 635 httpproxy = NULL; 636 637 /* 638 * Loop through as long as there's files to fetch. 639 */ 640 for (rval = 0; (rval == 0) && (argpos < argc); free(line), argpos++) { 641 if (strchr(argv[argpos], ':') == NULL) 642 break; 643 host = dir = file = portnum = user = pass = NULL; 644 645 /* 646 * We muck with the string, so we make a copy. 647 */ 648 line = strdup(argv[argpos]); 649 if (line == NULL) 650 errx(1, "Can't allocate memory for auto-fetch."); 651 652 /* 653 * Try HTTP URL-style arguments first. 654 */ 655 if (strncasecmp(line, HTTP_URL, sizeof(HTTP_URL) - 1) == 0 || 656 strncasecmp(line, FILE_URL, sizeof(FILE_URL) - 1) == 0) { 657 if (url_get(line, httpproxy, outfile) == -1) 658 rval = argpos + 1; 659 continue; 660 } 661 662 /* 663 * Try FTP URL-style arguments next. If ftpproxy is 664 * set, use url_get() instead of standard ftp. 665 * Finally, try host:file. 666 */ 667 host = line; 668 if (strncasecmp(line, FTP_URL, sizeof(FTP_URL) - 1) == 0) { 669 char *passend, *passagain, *userend; 670 671 if (ftpproxy) { 672 if (url_get(line, ftpproxy, outfile) == -1) 673 rval = argpos + 1; 674 continue; 675 } 676 host += sizeof(FTP_URL) - 1; 677 dir = strchr(host, '/'); 678 679 /* Look for [user:pass@]host[:port] */ 680 681 /* check if we have "user:pass@" */ 682 userend = strchr(host, ':'); 683 passend = strchr(host, '@'); 684 if (passend && userend && userend < passend && 685 (!dir || passend < dir)) { 686 user = host; 687 pass = userend + 1; 688 host = passend + 1; 689 *userend = *passend = '\0'; 690 passagain = strchr(host, '@'); 691 if (strchr(pass, '@') != NULL || 692 (passagain != NULL && passagain < dir)) { 693 warnx(at_encoding_warning); 694 goto bad_ftp_url; 695 } 696 697 if (EMPTYSTRING(user) || EMPTYSTRING(pass)) { 698 bad_ftp_url: 699 warnx("Invalid URL: %s", argv[argpos]); 700 rval = argpos + 1; 701 continue; 702 } 703 user = urldecode(user); 704 pass = urldecode(pass); 705 } 706 707 #ifdef INET6 708 /* check [host]:port, or [host] */ 709 if (host[0] == '[') { 710 cp = strchr(host, ']'); 711 if (cp && (!dir || cp < dir)) { 712 if (cp + 1 == dir || cp[1] == ':') { 713 host++; 714 *cp++ = '\0'; 715 } else 716 cp = NULL; 717 } else 718 cp = host; 719 } else 720 cp = host; 721 #else 722 cp = host; 723 #endif 724 725 /* split off host[:port] if there is */ 726 if (cp) { 727 portnum = strchr(cp, ':'); 728 if (!portnum) 729 ; 730 else { 731 if (!dir) 732 ; 733 else if (portnum + 1 < dir) { 734 *portnum++ = '\0'; 735 /* 736 * XXX should check if portnum 737 * is decimal number 738 */ 739 } else { 740 /* empty portnum */ 741 goto bad_ftp_url; 742 } 743 } 744 } else 745 portnum = NULL; 746 } else { /* classic style `host:file' */ 747 dir = strchr(host, ':'); 748 } 749 if (EMPTYSTRING(host)) { 750 rval = argpos + 1; 751 continue; 752 } 753 754 /* 755 * If dir is NULL, the file wasn't specified 756 * (URL looked something like ftp://host) 757 */ 758 if (dir != NULL) 759 *dir++ = '\0'; 760 761 /* 762 * Extract the file and (if present) directory name. 763 */ 764 if (!EMPTYSTRING(dir)) { 765 cp = strrchr(dir, '/'); 766 if (cp != NULL) { 767 *cp++ = '\0'; 768 file = cp; 769 } else { 770 file = dir; 771 dir = NULL; 772 } 773 } 774 if (debug) 775 fprintf(ttyout, 776 "user %s:%s host %s port %s dir %s file %s\n", 777 user, pass, host, portnum, dir, file); 778 779 /* 780 * Set up the connection. 781 */ 782 if (connected) 783 disconnect(0, NULL); 784 xargv[0] = __progname; 785 xargv[1] = host; 786 xargv[2] = NULL; 787 xargc = 2; 788 if (!EMPTYSTRING(portnum)) { 789 xargv[2] = portnum; 790 xargv[3] = NULL; 791 xargc = 3; 792 } 793 oautologin = autologin; 794 if (user != NULL) 795 autologin = 0; 796 setpeer(xargc, xargv); 797 autologin = oautologin; 798 if ((connected == 0) || 799 ((connected == 1) && !ftp_login(host, user, pass))) { 800 warnx("Can't connect or login to host `%s'", host); 801 rval = argpos + 1; 802 continue; 803 } 804 805 /* Always use binary transfers. */ 806 setbinary(0, NULL); 807 808 dirhasglob = filehasglob = 0; 809 if (doglob) { 810 if (!EMPTYSTRING(dir) && 811 strpbrk(dir, "*?[]{}") != NULL) 812 dirhasglob = 1; 813 if (!EMPTYSTRING(file) && 814 strpbrk(file, "*?[]{}") != NULL) 815 filehasglob = 1; 816 } 817 818 /* Change directories, if necessary. */ 819 if (!EMPTYSTRING(dir) && !dirhasglob) { 820 xargv[0] = "cd"; 821 xargv[1] = dir; 822 xargv[2] = NULL; 823 cd(2, xargv); 824 if (!dirchange) { 825 rval = argpos + 1; 826 continue; 827 } 828 } 829 830 if (EMPTYSTRING(file)) { 831 rval = -1; 832 continue; 833 } 834 835 if (verbose) 836 fprintf(ttyout, "Retrieving %s/%s\n", dir ? dir : "", file); 837 838 if (dirhasglob) { 839 snprintf(rempath, sizeof(rempath), "%s/%s", dir, file); 840 file = rempath; 841 } 842 843 /* Fetch the file(s). */ 844 xargc = 2; 845 xargv[0] = "get"; 846 xargv[1] = file; 847 xargv[2] = NULL; 848 if (dirhasglob || filehasglob) { 849 int ointeractive; 850 851 ointeractive = interactive; 852 interactive = 0; 853 xargv[0] = "mget"; 854 mget(xargc, xargv); 855 interactive = ointeractive; 856 } else { 857 if (outfile != NULL) { 858 xargv[2] = outfile; 859 xargv[3] = NULL; 860 xargc++; 861 } 862 get(xargc, xargv); 863 } 864 865 if ((code / 100) != COMPLETE) 866 rval = argpos + 1; 867 } 868 if (connected && rval != -1) 869 disconnect(0, NULL); 870 return (rval); 871 } 872 873 char * 874 urldecode(str) 875 const char *str; 876 { 877 char *ret; 878 char c; 879 int i, reallen; 880 881 if (str == NULL) 882 return NULL; 883 if ((ret = malloc(strlen(str)+1)) == NULL) 884 err(1, "Can't allocate memory for URL decoding"); 885 for (i = 0, reallen = 0; str[i] != '\0'; i++, reallen++, ret++) { 886 c = str[i]; 887 if (c == '+') { 888 *ret = ' '; 889 continue; 890 } 891 /* Can't use strtol here because next char after %xx may be 892 * a digit. */ 893 if (c == '%' && isxdigit(str[i+1]) && isxdigit(str[i+2])) { 894 *ret = hextochar(&str[i+1]); 895 i+=2; 896 continue; 897 } 898 *ret = c; 899 } 900 *ret = '\0'; 901 902 return ret-reallen; 903 } 904 905 char 906 hextochar(str) 907 const char *str; 908 { 909 char c, ret; 910 911 c = str[0]; 912 ret = c; 913 if (isalpha(c)) 914 ret -= isupper(c) ? 'A' - 10 : 'a' - 10; 915 else 916 ret -= '0'; 917 ret *= 16; 918 919 c = str[1]; 920 ret += c; 921 if (isalpha(c)) 922 ret -= isupper(c) ? 'A' - 10 : 'a' - 10; 923 else 924 ret -= '0'; 925 return ret; 926 } 927 928 int 929 isurl(p) 930 const char *p; 931 { 932 933 if (strncasecmp(p, FTP_URL, sizeof(FTP_URL) - 1) == 0 || 934 strncasecmp(p, HTTP_URL, sizeof(HTTP_URL) - 1) == 0 || 935 strncasecmp(p, FILE_URL, sizeof(FILE_URL) - 1) == 0 || 936 strstr(p, ":/")) 937 return (1); 938 return (0); 939 } 940