fetch.c revision 1.5
1 /* $NetBSD: fetch.c,v 1.5 1997/04/05 03:27:36 lukem Exp $ */ 2 3 /*- 4 * Copyright (c) 1997 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Jason Thorpe and 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 REGENTS OR CONTRIBUTORS BE 30 * 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 #ifndef lint 40 static char rcsid[] = "$NetBSD: fetch.c,v 1.5 1997/04/05 03:27:36 lukem Exp $"; 41 #endif /* not lint */ 42 43 /* 44 * FTP User Program -- Command line file retrieval 45 */ 46 47 #include <sys/types.h> 48 #include <sys/param.h> 49 #include <sys/socket.h> 50 51 #include <netinet/in.h> 52 53 #include <arpa/ftp.h> 54 #include <arpa/inet.h> 55 56 #include <ctype.h> 57 #include <err.h> 58 #include <netdb.h> 59 #include <fcntl.h> 60 #include <signal.h> 61 #include <stdio.h> 62 #include <stdlib.h> 63 #include <string.h> 64 #include <unistd.h> 65 66 #include "ftp_var.h" 67 68 #define FTP_URL "ftp://" /* ftp URL prefix */ 69 #define HTTP_URL "http://" /* http URL prefix */ 70 #define FTP_PROXY "ftp_proxy" /* env var with ftp proxy location */ 71 #define HTTP_PROXY "http_proxy" /* env var with http proxy location */ 72 73 74 #define EMPTYSTRING(x) ((x) == NULL || (*(x) == '\0')) 75 76 jmp_buf httpabort; 77 78 /* 79 * Retrieve URL, via the proxy in $proxyvar if necessary. 80 * Modifies the string argument given. 81 * Returns -1 on failure, 0 on success 82 */ 83 int 84 url_get(line, proxyenv) 85 char *line; 86 char *proxyenv; 87 { 88 struct sockaddr_in sin; 89 int i, out, port, s; 90 size_t buflen, len; 91 char c, *cp, *cp2, *savefile, *portnum, *path, buf[4096]; 92 char *proxy, *host; 93 sig_t oldintr; 94 off_t hashbytes; 95 96 s = -1; 97 proxy = NULL; 98 99 if (strncmp(line, HTTP_URL, sizeof(HTTP_URL) - 1) == 0) 100 host = line + sizeof(HTTP_URL) - 1; 101 else if (strncmp(line, FTP_URL, sizeof(FTP_URL) - 1) == 0) 102 host = line + sizeof(FTP_URL) - 1; 103 else 104 errx(1, "url_get: invalid url '%s'", line); 105 106 path = strchr(host, '/'); /* find path */ 107 if (EMPTYSTRING(path)) 108 goto cleanup_url_get; 109 *path++ = '\0'; 110 if (EMPTYSTRING(path)) 111 goto cleanup_url_get; 112 113 savefile = strrchr(path, '/'); /* find savefile */ 114 if (savefile != NULL) 115 savefile++; 116 else 117 savefile = path; 118 if (EMPTYSTRING(savefile)) 119 goto cleanup_url_get; 120 121 if (proxyenv != NULL) { /* use proxy */ 122 proxy = strdup(proxyenv); 123 if (proxy == NULL) 124 errx(1, "Can't allocate memory for proxy url."); 125 if (strncmp(proxy, HTTP_URL, sizeof(HTTP_URL) - 1) == 0) 126 host = proxy + sizeof(HTTP_URL) - 1; 127 else if (strncmp(proxy, FTP_URL, sizeof(FTP_URL) - 1) == 0) 128 host = proxy + sizeof(FTP_URL) - 1; 129 else { 130 warnx("Malformed proxy url: %s", proxy); 131 goto cleanup_url_get; 132 } 133 if (EMPTYSTRING(host)) 134 goto cleanup_url_get; 135 *--path = '/'; /* add / back to real path */ 136 path = strchr(host, '/'); /* remove trailing / on host */ 137 if (! EMPTYSTRING(path)) 138 *path++ = '\0'; 139 path = line; 140 } 141 142 portnum = strchr(host, ':'); /* find portnum */ 143 if (portnum != NULL) 144 *portnum++ = '\0'; 145 146 if (debug) 147 printf("host %s, port %s, path %s, save as %s.\n", 148 host, portnum, path, savefile); 149 150 memset(&sin, 0, sizeof(sin)); 151 sin.sin_family = AF_INET; 152 153 if (isdigit(host[0])) { 154 if (inet_aton(host, &sin.sin_addr) == 0) { 155 warnx("invalid IP address: %s", host); 156 goto cleanup_url_get; 157 } 158 } else { 159 struct hostent *hp; 160 161 hp = gethostbyname(host); 162 if (hp == NULL) { 163 warnx("%s: %s", host, hstrerror(h_errno)); 164 goto cleanup_url_get; 165 } 166 if (hp->h_addrtype != AF_INET) { 167 warnx("%s: not an Internet address?", host); 168 goto cleanup_url_get; 169 } 170 memcpy(&sin.sin_addr, hp->h_addr, hp->h_length); 171 } 172 173 if (! EMPTYSTRING(portnum)) { 174 port = atoi(portnum); 175 if (port < 1 || (port & 0xffff) != port) { 176 warnx("invalid port: %s", portnum); 177 goto cleanup_url_get; 178 } 179 port = htons(port); 180 } else 181 port = httpport; 182 sin.sin_port = port; 183 184 s = socket(AF_INET, SOCK_STREAM, 0); 185 if (s == -1) { 186 warnx("Can't create socket"); 187 goto cleanup_url_get; 188 } 189 190 if (connect(s, (struct sockaddr *)&sin, sizeof(sin)) == -1) { 191 warn("Can't connect to %s", host); 192 goto cleanup_url_get; 193 } 194 195 /* 196 * Construct and send the request. We're expecting a return 197 * status of "200". Proxy requests don't want leading /. 198 */ 199 if (!proxy) 200 printf("Requesting %s:%d/%s\n", line, ntohs(port), path); 201 else 202 printf("Requesting %s (via %s)\n", line, proxyenv); 203 snprintf(buf, sizeof(buf), "GET %s%s HTTP/1.0\n\n", 204 proxy ? "" : "/", path); 205 buflen = strlen(buf); 206 if (write(s, buf, buflen) < buflen) { 207 warn("write"); 208 goto cleanup_url_get; 209 } 210 memset(buf, 0, sizeof(buf)); 211 for (i = 0, buflen = sizeof(buf), cp = buf; i < buflen; cp++, i++) { 212 if (read(s, cp, 1) != 1) 213 goto improper; 214 if (*cp == '\r') 215 continue; 216 if (*cp == '\n') 217 break; 218 } 219 buf[buflen - 1] = '\0'; /* sanity */ 220 cp = strchr(buf, ' '); 221 if (cp == NULL) 222 goto improper; 223 else 224 cp++; 225 if (strncmp(cp, "200", 3)) { 226 warnx("Error retrieving file: %s", cp); 227 goto cleanup_url_get; 228 } 229 230 /* 231 * Read the rest of the header. 232 */ 233 memset(buf, 0, sizeof(buf)); 234 c = '\0'; 235 for (i = 0, buflen = sizeof(buf), cp = buf; i < buflen; cp++, i++) { 236 if (read(s, cp, 1) != 1) 237 goto improper; 238 if (*cp == '\r') 239 continue; 240 if (*cp == '\n' && c == '\n') 241 break; 242 c = *cp; 243 } 244 buf[buflen - 1] = '\0'; /* sanity */ 245 246 /* 247 * Look for the "Content-length: " header. 248 */ 249 #define CONTENTLEN "Content-Length: " 250 for (cp = buf; *cp != '\0'; cp++) { 251 if (tolower(*cp) == 'c' && 252 strncasecmp(cp, CONTENTLEN, sizeof(CONTENTLEN) - 1) == 0) 253 break; 254 } 255 if (*cp == '\0') 256 goto improper; 257 cp += sizeof(CONTENTLEN) - 1; 258 cp2 = strchr(cp, '\n'); 259 if (cp2 == NULL) 260 goto improper; 261 else 262 *cp2 = '\0'; 263 filesize = atoi(cp); 264 if (filesize < 1) 265 goto improper; 266 267 /* Open the output file. */ 268 out = open(savefile, O_CREAT | O_WRONLY | O_TRUNC, 0666); 269 if (out < 0) { 270 warn("Can't open %s", savefile); 271 goto cleanup_url_get; 272 } 273 274 /* Trap signals */ 275 oldintr = NULL; 276 if (setjmp(httpabort)) { 277 if (oldintr) 278 (void)signal(SIGINT, oldintr); 279 goto cleanup_url_get; 280 } 281 oldintr = signal(SIGINT, aborthttp); 282 283 bytes = 0; 284 hashbytes = mark; 285 progressmeter(-1); 286 287 /* Finally, suck down the file. */ 288 i = 0; 289 while ((len = read(s, buf, sizeof(buf))) > 0) { 290 bytes += len; 291 for (cp = buf; len > 0; len -= i, cp += i) { 292 if ((i = write(out, cp, len)) == -1) { 293 warn("Writing %s", savefile); 294 goto cleanup_url_get; 295 } 296 else if (i == 0) 297 break; 298 } 299 if (hash && !progress) { 300 while (bytes >= hashbytes) { 301 (void)putchar('#'); 302 hashbytes += mark; 303 } 304 (void)fflush(stdout); 305 } 306 } 307 if (hash && !progress && bytes > 0) { 308 if (bytes < mark) 309 (void)putchar('#'); 310 (void)putchar('\n'); 311 (void)fflush(stdout); 312 } 313 if (len != 0) { 314 warn("Reading from socket"); 315 goto cleanup_url_get; 316 } 317 progressmeter(1); 318 if (verbose) 319 puts("Successfully retrieved file."); 320 (void)signal(SIGINT, oldintr); 321 322 close(s); 323 close(out); 324 if (proxy) 325 free(proxy); 326 return (0); 327 328 improper: 329 warnx("improper response from %s", host); 330 cleanup_url_get: 331 if (s != -1) 332 close(s); 333 if (proxy) 334 free(proxy); 335 return (-1); 336 } 337 338 /* 339 * Abort a http retrieval 340 */ 341 void 342 aborthttp(notused) 343 int notused; 344 { 345 346 alarmtimer(0); 347 puts("\nhttp fetch aborted."); 348 (void)fflush(stdout); 349 longjmp(httpabort, 1); 350 } 351 352 /* 353 * Retrieve multiple files from the command line, transferring 354 * files of the form "host:path", "ftp://host/path" using the 355 * ftp protocol, and files of the form "http://host/path" using 356 * the http protocol. 357 * If path has a trailing "/", then return (-1); 358 * the path will be cd-ed into and the connection remains open, 359 * and the function will return -1 (to indicate the connection 360 * is alive). 361 * If an error occurs the return value will be the offset+1 in 362 * argv[] of the file that caused a problem (i.e, argv[x] 363 * returns x+1) 364 * Otherwise, 0 is returned if all files retrieved successfully. 365 */ 366 int 367 auto_fetch(argc, argv) 368 int argc; 369 char *argv[]; 370 { 371 static char lasthost[MAXHOSTNAMELEN]; 372 char *xargv[5]; 373 char *cp, *line, *host, *dir, *file, *portnum; 374 char *ftpproxy, *httpproxy; 375 int rval, xargc, argpos; 376 int dirhasglob, filehasglob; 377 char rempath[MAXPATHLEN]; 378 379 argpos = 0; 380 381 if (setjmp(toplevel)) { 382 if (connected) 383 disconnect(0, NULL); 384 return (argpos + 1); 385 } 386 (void)signal(SIGINT, (sig_t)intr); 387 (void)signal(SIGPIPE, (sig_t)lostpeer); 388 389 ftpproxy = getenv(FTP_PROXY); 390 httpproxy = getenv(HTTP_PROXY); 391 392 /* 393 * Loop through as long as there's files to fetch. 394 */ 395 for (rval = 0; (rval == 0) && (argpos < argc); free(line), argpos++) { 396 if (strchr(argv[argpos], ':') == NULL) 397 break; 398 host = dir = file = portnum = NULL; 399 400 /* 401 * We muck with the string, so we make a copy. 402 */ 403 line = strdup(argv[argpos]); 404 if (line == NULL) 405 errx(1, "Can't allocate memory for auto-fetch."); 406 407 /* 408 * Try HTTP URL-style arguments first. 409 */ 410 if (strncmp(line, HTTP_URL, sizeof(HTTP_URL) - 1) == 0) { 411 if (url_get(line, httpproxy) == -1) 412 rval = argpos + 1; 413 continue; 414 } 415 416 /* 417 * Try FTP URL-style arguments next. If ftpproxy is 418 * set, use url_get() instead of standard ftp. 419 * Finally, try host:file. 420 */ 421 host = line; 422 if (strncmp(line, FTP_URL, sizeof(FTP_URL) - 1) == 0) { 423 if (ftpproxy) { 424 if (url_get(line, ftpproxy) == -1) 425 rval = argpos + 1; 426 continue; 427 } 428 host += sizeof(FTP_URL) - 1; 429 cp = strchr(host, '/'); 430 431 /* Look for a port number after the host name. */ 432 portnum = strchr(host, ':'); 433 if (portnum != NULL) 434 *portnum++ = '\0'; 435 } else /* classic style `host:file' */ 436 cp = strchr(host, ':'); 437 if (EMPTYSTRING(host)) { 438 rval = argpos + 1; 439 continue; 440 } 441 442 /* 443 * If cp is NULL, the file wasn't specified 444 * (URL looked something like ftp://host) 445 */ 446 if (cp != NULL) 447 *cp++ = '\0'; 448 449 /* 450 * Extract the file and (if present) directory name. 451 */ 452 dir = cp; 453 if (! EMPTYSTRING(dir)) { 454 cp = strrchr(cp, '/'); 455 if (cp != NULL) { 456 *cp++ = '\0'; 457 file = cp; 458 } else { 459 file = dir; 460 dir = NULL; 461 } 462 } 463 if (debug) 464 printf("host '%s', dir '%s', file '%s'\n", 465 host, dir, file); 466 467 /* 468 * Set up the connection if we don't have one. 469 */ 470 if (strcmp(host, lasthost) != 0) { 471 (void)strcpy(lasthost, host); 472 if (connected) 473 disconnect(0, NULL); 474 xargv[0] = __progname; 475 xargv[1] = host; 476 xargv[2] = NULL; 477 xargc = 2; 478 if (portnum != NULL) { 479 xargv[2] = portnum; 480 xargv[3] = NULL; 481 xargc = 3; 482 } 483 setpeer(xargc, xargv); 484 if (connected == 0) { 485 warnx("Can't connect to host `%s'", host); 486 rval = argpos + 1; 487 continue; 488 } 489 490 /* Always use binary transfers. */ 491 setbinary(0, NULL); 492 } 493 else /* already have connection, cd back to '/' */ 494 { 495 xargv[0] = "cd"; 496 xargv[1] = "/"; 497 xargv[2] = NULL; 498 cd(2, xargv); 499 if (! dirchange) { 500 rval = argpos + 1; 501 continue; 502 } 503 } 504 505 dirhasglob = filehasglob = 0; 506 if (doglob) { 507 if (! EMPTYSTRING(dir) && 508 strpbrk(dir, "*?[]{}") != NULL) 509 dirhasglob = 1; 510 if (! EMPTYSTRING(file) && 511 strpbrk(file, "*?[]{}") != NULL) 512 filehasglob = 1; 513 } 514 515 /* Change directories, if necessary. */ 516 if (! EMPTYSTRING(dir) && !dirhasglob) { 517 xargv[0] = "cd"; 518 xargv[1] = dir; 519 xargv[2] = NULL; 520 cd(2, xargv); 521 if (! dirchange) { 522 rval = argpos + 1; 523 continue; 524 } 525 } 526 527 if (EMPTYSTRING(file)) { 528 rval = -1; 529 continue; 530 } 531 532 if (!verbose) 533 printf("Retrieving %s/%s\n", dir ? dir : "", file); 534 535 if (dirhasglob) { 536 snprintf(rempath, sizeof(rempath), "%s/%s", dir, file); 537 file = rempath; 538 } 539 540 /* Fetch the file(s). */ 541 xargv[0] = "get"; 542 xargv[1] = file; 543 xargv[2] = NULL; 544 if (dirhasglob || filehasglob) { 545 int ointeractive; 546 547 ointeractive = interactive; 548 interactive = 0; 549 xargv[0] = "mget"; 550 mget(2, xargv); 551 interactive = ointeractive; 552 } else 553 get(2, xargv); 554 555 if ((code / 100) != COMPLETE) 556 rval = argpos + 1; 557 } 558 if (connected && rval != -1) 559 disconnect(0, NULL); 560 return (rval); 561 } 562
Indexes created Tue Sep 23 14:10:03 GMT 2025