Annotation of src/usr.bin/ftp/fetch.c, Revision 1.49
1.49 ! krw 1: /* $OpenBSD: fetch.c,v 1.48 2003/12/16 21:46:22 deraadt Exp $ */
1.15 millert 2: /* $NetBSD: fetch.c,v 1.14 1997/08/18 10:20:20 lukem Exp $ */
1.1 millert 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
1.15 millert 30: * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
31: * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
1.1 millert 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:
1.48 deraadt 40: #if !defined(lint) && !defined(SMALL)
1.49 ! krw 41: static char rcsid[] = "$OpenBSD: fetch.c,v 1.48 2003/12/16 21:46:22 deraadt Exp $";
1.48 deraadt 42: #endif /* not lint and not SMALL */
1.1 millert 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>
1.22 deraadt 51: #include <sys/stat.h>
1.1 millert 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>
1.17 millert 60: #include <libgen.h>
1.1 millert 61: #include <netdb.h>
62: #include <fcntl.h>
1.3 millert 63: #include <signal.h>
1.1 millert 64: #include <stdio.h>
1.19 deraadt 65: #include <errno.h>
1.1 millert 66: #include <stdlib.h>
67: #include <string.h>
68: #include <unistd.h>
1.40 fgsch 69: #include <util.h>
1.1 millert 70:
71: #include "ftp_var.h"
72:
1.38 millert 73: static int url_get(const char *, const char *, const char *);
74: void aborthttp(int);
75: void abortfile(int);
1.42 deraadt 76: char hextochar(const char *);
77: char *urldecode(const char *);
1.14 millert 78:
1.1 millert 79: #define FTP_URL "ftp://" /* ftp URL prefix */
80: #define HTTP_URL "http://" /* http URL prefix */
1.22 deraadt 81: #define FILE_URL "file:" /* file URL prefix */
1.6 millert 82: #define FTP_PROXY "ftp_proxy" /* env var with ftp proxy location */
1.1 millert 83: #define HTTP_PROXY "http_proxy" /* env var with http proxy location */
84:
85:
86: #define EMPTYSTRING(x) ((x) == NULL || (*(x) == '\0'))
87:
1.37 heko 88: static const char *at_encoding_warning =
89: "Extra `@' characters in usernames and passwords should be encoded as %%40";
90:
1.1 millert 91: jmp_buf httpabort;
92:
93: /*
1.6 millert 94: * Retrieve URL, via the proxy in $proxyvar if necessary.
1.1 millert 95: * Modifies the string argument given.
96: * Returns -1 on failure, 0 on success
97: */
1.14 millert 98: static int
1.17 millert 99: url_get(origline, proxyenv, outfile)
1.14 millert 100: const char *origline;
101: const char *proxyenv;
1.17 millert 102: const char *outfile;
1.1 millert 103: {
1.25 itojun 104: struct addrinfo hints, *res0, *res;
105: int error;
1.40 fgsch 106: int i, isftpurl, isfileurl, isredirect;
1.34 millert 107: volatile int s, out;
1.14 millert 108: size_t len;
1.40 fgsch 109: char *cp, *ep, *portnum, *path;
1.44 itojun 110: char pbuf[NI_MAXSERV], hbuf[NI_MAXHOST];
1.34 millert 111: const char * volatile savefile;
1.40 fgsch 112: char *line, *host, *port, *buf;
1.34 millert 113: char * volatile proxy;
1.28 itojun 114: char *hosttail;
1.14 millert 115: volatile sig_t oldintr;
1.1 millert 116: off_t hashbytes;
1.25 itojun 117: char *cause = "unknown";
1.40 fgsch 118: FILE *fin;
119: int rval;
1.1 millert 120:
121: s = -1;
122: proxy = NULL;
1.40 fgsch 123: fin = NULL;
124: buf = NULL;
1.14 millert 125: isftpurl = 0;
1.22 deraadt 126: isfileurl = 0;
1.40 fgsch 127: isredirect = 0;
128: rval = -1;
1.14 millert 129:
130: line = strdup(origline);
131: if (line == NULL)
132: errx(1, "Can't allocate memory to parse URL");
1.7 millert 133: if (strncasecmp(line, HTTP_URL, sizeof(HTTP_URL) - 1) == 0)
1.6 millert 134: host = line + sizeof(HTTP_URL) - 1;
1.14 millert 135: else if (strncasecmp(line, FTP_URL, sizeof(FTP_URL) - 1) == 0) {
1.6 millert 136: host = line + sizeof(FTP_URL) - 1;
1.14 millert 137: isftpurl = 1;
1.22 deraadt 138: } else if (strncasecmp(line, FILE_URL, sizeof(FILE_URL) - 1) == 0) {
139: host = line + sizeof(FILE_URL) - 1;
140: isfileurl = 1;
1.14 millert 141: } else
142: errx(1, "url_get: Invalid URL '%s'", line);
1.6 millert 143:
1.22 deraadt 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: }
1.14 millert 161: }
1.1 millert 162:
1.17 millert 163: if (outfile)
164: savefile = outfile;
1.1 millert 165: else
1.17 millert 166: savefile = basename(path);
167:
1.14 millert 168: if (EMPTYSTRING(savefile)) {
169: if (isftpurl)
170: goto noftpautologin;
171: warnx("Invalid URL (no file after directory): %s", origline);
1.6 millert 172: goto cleanup_url_get;
1.14 millert 173: }
1.1 millert 174:
175: if (proxyenv != NULL) { /* use proxy */
176: proxy = strdup(proxyenv);
177: if (proxy == NULL)
1.14 millert 178: errx(1, "Can't allocate memory for proxy URL.");
1.7 millert 179: if (strncasecmp(proxy, HTTP_URL, sizeof(HTTP_URL) - 1) == 0)
1.6 millert 180: host = proxy + sizeof(HTTP_URL) - 1;
1.7 millert 181: else if (strncasecmp(proxy, FTP_URL, sizeof(FTP_URL) - 1) == 0)
1.6 millert 182: host = proxy + sizeof(FTP_URL) - 1;
183: else {
1.14 millert 184: warnx("Malformed proxy URL: %s", proxyenv);
1.6 millert 185: goto cleanup_url_get;
186: }
1.14 millert 187: if (EMPTYSTRING(host)) {
188: warnx("Malformed proxy URL: %s", proxyenv);
1.6 millert 189: goto cleanup_url_get;
1.14 millert 190: }
1.1 millert 191: *--path = '/'; /* add / back to real path */
192: path = strchr(host, '/'); /* remove trailing / on host */
1.42 deraadt 193: if (!EMPTYSTRING(path))
1.1 millert 194: *path++ = '\0';
195: path = line;
196: }
197:
1.22 deraadt 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);
1.42 deraadt 230:
1.22 deraadt 231: bytes = 0;
232: hashbytes = mark;
233: progressmeter(-1);
1.40 fgsch 234:
235: if ((buf = malloc(4096)) == NULL)
1.47 deraadt 236: errx(1, "Can't allocate memory for transfer buffer");
1.42 deraadt 237:
1.22 deraadt 238: /* Finally, suck down the file. */
239: i = 0;
1.40 fgsch 240: while ((len = read(s, buf, 4096)) > 0) {
1.22 deraadt 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);
1.42 deraadt 272:
1.40 fgsch 273: rval = 0;
274: goto cleanup_url_get;
1.22 deraadt 275: }
276:
1.28 itojun 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 */
1.1 millert 285: if (portnum != NULL)
286: *portnum++ = '\0';
287:
288: if (debug)
1.10 deraadt 289: fprintf(ttyout, "host %s, port %s, path %s, save as %s.\n",
1.1 millert 290: host, portnum, path, savefile);
291:
1.25 itojun 292: memset(&hints, 0, sizeof(hints));
1.39 deraadt 293: hints.ai_family = family;
1.25 itojun 294: hints.ai_socktype = SOCK_STREAM;
295: port = portnum ? portnum : httpport;
296: error = getaddrinfo(host, port, &hints, &res0);
1.30 deraadt 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: }
1.25 itojun 305: if (error) {
306: warnx("%s: %s", gai_strerror(error), host);
307: goto cleanup_url_get;
1.1 millert 308: }
309:
1.25 itojun 310: s = -1;
311: for (res = res0; res; res = res->ai_next) {
1.44 itojun 312: if (getnameinfo(res->ai_addr, res->ai_addrlen, hbuf,
313: sizeof(hbuf), NULL, 0, NI_NUMERICHOST) != 0)
314: strlcpy(hbuf, "(unknown)", sizeof(hbuf));
1.41 deraadt 315: if (verbose)
1.44 itojun 316: fprintf(ttyout, "Trying %s...\n", hbuf);
1.14 millert 317:
1.25 itojun 318: s = socket(res->ai_family, res->ai_socktype, res->ai_protocol);
319: if (s == -1) {
320: cause = "socket";
321: continue;
1.1 millert 322: }
323:
1.25 itojun 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";
1.19 deraadt 331: continue;
332: }
1.25 itojun 333:
1.29 itojun 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:
1.25 itojun 341: break;
342: }
343: freeaddrinfo(res0);
344: if (s < 0) {
1.33 millert 345: warn("%s", cause);
1.6 millert 346: goto cleanup_url_get;
1.1 millert 347: }
348:
1.40 fgsch 349: fin = fdopen(s, "r+");
350:
1.1 millert 351: /*
1.40 fgsch 352: * Construct and send the request. Proxy requests don't want leading /.
1.1 millert 353: */
1.32 itojun 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)
1.23 deraadt 360: fprintf(ttyout, "Requesting %s (via %s)\n",
361: origline, proxyenv);
1.40 fgsch 362: fprintf(fin, "GET %s HTTP/1.0\r\n%s\r\n\r\n", path, HTTP_USER_AGENT);
1.28 itojun 363: } else {
1.32 itojun 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';
1.35 heko 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)
1.42 deraadt 381: fprintf(fin,
382: "GET /%s HTTP/1.0\r\nHost: [%s]:%s\r\n%s\r\n\r\n",
1.36 heko 383: path, h, port, HTTP_USER_AGENT);
1.35 heko 384: else
1.42 deraadt 385: fprintf(fin,
386: "GET /%s HTTP/1.0\r\nHost: [%s]\r\n%s\r\n\r\n",
1.36 heko 387: path, h, HTTP_USER_AGENT);
1.32 itojun 388: free(h);
389: } else {
1.35 heko 390: if (port && strcmp(port, "80") != 0)
1.42 deraadt 391: fprintf(fin,
392: "GET /%s HTTP/1.0\r\nHost: %s:%s\r\n%s\r\n\r\n",
1.36 heko 393: path, host, port, HTTP_USER_AGENT);
1.35 heko 394: else
1.42 deraadt 395: fprintf(fin,
396: "GET /%s HTTP/1.0\r\nHost: %s\r\n%s\r\n\r\n",
1.36 heko 397: path, host, HTTP_USER_AGENT);
1.32 itojun 398: }
1.28 itojun 399: }
1.40 fgsch 400: if (fflush(fin) == EOF) {
1.14 millert 401: warn("Writing HTTP request");
1.6 millert 402: goto cleanup_url_get;
1.1 millert 403: }
1.40 fgsch 404:
405: if ((buf = fparseln(fin, &len, NULL, "\0\0\0", 0)) == NULL) {
406: warn("Receiving HTTP reply");
407: goto cleanup_url_get;
1.1 millert 408: }
1.40 fgsch 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:
1.1 millert 415: cp = strchr(buf, ' ');
416: if (cp == NULL)
417: goto improper;
418: else
419: cp++;
1.40 fgsch 420: if (strncmp(cp, "301", 3) == 0 || strncmp(cp, "302", 3) == 0) {
421: isredirect++;
422: } else if (strncmp(cp, "200", 3)) {
1.1 millert 423: warnx("Error retrieving file: %s", cp);
1.6 millert 424: goto cleanup_url_get;
1.1 millert 425: }
426:
427: /*
428: * Read the rest of the header.
429: */
1.40 fgsch 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)
1.1 millert 441: break;
1.40 fgsch 442: if (debug)
443: fprintf(ttyout, "received '%s'\n", buf);
1.1 millert 444:
1.40 fgsch 445: /* Look for some headers */
446: cp = buf;
1.1 millert 447: #define CONTENTLEN "Content-Length: "
1.40 fgsch 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: }
1.1 millert 471: }
472:
1.17 millert 473: /* Open the output file. */
474: if (strcmp(savefile, "-") != 0) {
1.10 deraadt 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
1.17 millert 481: out = fileno(stdout);
1.1 millert 482:
483: /* Trap signals */
484: oldintr = NULL;
485: if (setjmp(httpabort)) {
486: if (oldintr)
1.2 millert 487: (void)signal(SIGINT, oldintr);
1.6 millert 488: goto cleanup_url_get;
1.1 millert 489: }
490: oldintr = signal(SIGINT, aborthttp);
491:
492: bytes = 0;
493: hashbytes = mark;
494: progressmeter(-1);
1.43 millert 495:
496: free(buf);
1.1 millert 497:
498: /* Finally, suck down the file. */
1.40 fgsch 499: if ((buf = malloc(4096)) == NULL)
1.47 deraadt 500: errx(1, "Can't allocate memory for transfer buffer");
1.1 millert 501: i = 0;
1.40 fgsch 502: while ((len = fread(buf, sizeof(char), 4096, fin)) > 0) {
1.1 millert 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);
1.6 millert 507: goto cleanup_url_get;
1.1 millert 508: }
509: else if (i == 0)
510: break;
511: }
512: if (hash && !progress) {
513: while (bytes >= hashbytes) {
1.10 deraadt 514: (void)putc('#', ttyout);
1.1 millert 515: hashbytes += mark;
516: }
1.10 deraadt 517: (void)fflush(ttyout);
1.1 millert 518: }
519: }
520: if (hash && !progress && bytes > 0) {
521: if (bytes < mark)
1.10 deraadt 522: (void)putc('#', ttyout);
523: (void)putc('\n', ttyout);
524: (void)fflush(ttyout);
1.1 millert 525: }
526: if (len != 0) {
527: warn("Reading from socket");
1.6 millert 528: goto cleanup_url_get;
1.1 millert 529: }
530: progressmeter(1);
1.24 deraadt 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:
1.1 millert 537: if (verbose)
1.10 deraadt 538: fputs("Successfully retrieved file.\n", ttyout);
1.2 millert 539: (void)signal(SIGINT, oldintr);
1.1 millert 540:
1.40 fgsch 541: rval = 0;
542: goto cleanup_url_get;
1.1 millert 543:
1.14 millert 544: noftpautologin:
545: warnx(
546: "Auto-login using ftp URLs isn't supported when using $ftp_proxy");
547: goto cleanup_url_get;
548:
1.1 millert 549: improper:
1.8 millert 550: warnx("Improper response from %s", host);
1.14 millert 551:
1.6 millert 552: cleanup_url_get:
1.40 fgsch 553: if (fin != NULL)
554: fclose(fin);
555: else if (s != -1)
1.1 millert 556: close(s);
1.40 fgsch 557: if (buf)
558: free(buf);
1.1 millert 559: if (proxy)
560: free(proxy);
1.14 millert 561: free(line);
1.40 fgsch 562: return (rval);
1.1 millert 563: }
564:
565: /*
566: * Abort a http retrieval
567: */
568: void
1.3 millert 569: aborthttp(notused)
570: int notused;
1.1 millert 571: {
572:
573: alarmtimer(0);
1.10 deraadt 574: fputs("\nhttp fetch aborted.\n", ttyout);
575: (void)fflush(ttyout);
1.1 millert 576: longjmp(httpabort, 1);
577: }
578:
579: /*
1.22 deraadt 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: /*
1.1 millert 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.
1.2 millert 598: * If path has a trailing "/", then return (-1);
1.1 millert 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
1.17 millert 608: auto_fetch(argc, argv, outfile)
1.1 millert 609: int argc;
610: char *argv[];
1.17 millert 611: char *outfile;
1.1 millert 612: {
613: char *xargv[5];
614: char *cp, *line, *host, *dir, *file, *portnum;
1.8 millert 615: char *user, *pass;
1.6 millert 616: char *ftpproxy, *httpproxy;
1.14 millert 617: int rval, xargc;
618: volatile int argpos;
1.49 ! krw 619: int dirhasglob, filehasglob, oautologin;
1.14 millert 620: char rempath[MAXPATHLEN];
1.1 millert 621:
622: argpos = 0;
623:
624: if (setjmp(toplevel)) {
625: if (connected)
626: disconnect(0, NULL);
1.2 millert 627: return (argpos + 1);
1.1 millert 628: }
1.3 millert 629: (void)signal(SIGINT, (sig_t)intr);
630: (void)signal(SIGPIPE, (sig_t)lostpeer);
1.1 millert 631:
1.45 millert 632: if ((ftpproxy = getenv(FTP_PROXY)) != NULL && *ftpproxy == '\0')
633: ftpproxy = NULL;
634: if ((httpproxy = getenv(HTTP_PROXY)) != NULL && *httpproxy == '\0')
635: httpproxy = NULL;
1.6 millert 636:
1.1 millert 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;
1.8 millert 643: host = dir = file = portnum = user = pass = NULL;
1.1 millert 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: */
1.22 deraadt 655: if (strncasecmp(line, HTTP_URL, sizeof(HTTP_URL) - 1) == 0 ||
656: strncasecmp(line, FILE_URL, sizeof(FILE_URL) - 1) == 0) {
1.17 millert 657: if (url_get(line, httpproxy, outfile) == -1)
1.1 millert 658: rval = argpos + 1;
659: continue;
660: }
661:
662: /*
1.6 millert 663: * Try FTP URL-style arguments next. If ftpproxy is
664: * set, use url_get() instead of standard ftp.
665: * Finally, try host:file.
1.1 millert 666: */
667: host = line;
1.7 millert 668: if (strncasecmp(line, FTP_URL, sizeof(FTP_URL) - 1) == 0) {
1.37 heko 669: char *passend, *passagain, *userend;
1.31 itojun 670:
1.6 millert 671: if (ftpproxy) {
1.17 millert 672: if (url_get(line, ftpproxy, outfile) == -1)
1.6 millert 673: rval = argpos + 1;
674: continue;
675: }
1.1 millert 676: host += sizeof(FTP_URL) - 1;
1.8 millert 677: dir = strchr(host, '/');
1.1 millert 678:
1.8 millert 679: /* Look for [user:pass@]host[:port] */
1.31 itojun 680:
681: /* check if we have "user:pass@" */
1.37 heko 682: userend = strchr(host, ':');
1.31 itojun 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';
1.37 heko 690: passagain = strchr(host, '@');
1.42 deraadt 691: if (strchr(pass, '@') != NULL ||
1.37 heko 692: (passagain != NULL && passagain < dir)) {
693: warnx(at_encoding_warning);
694: goto bad_ftp_url;
1.42 deraadt 695: }
1.31 itojun 696:
697: if (EMPTYSTRING(user) || EMPTYSTRING(pass)) {
1.11 millert 698: bad_ftp_url:
1.31 itojun 699: warnx("Invalid URL: %s", argv[argpos]);
700: rval = argpos + 1;
701: continue;
702: }
1.37 heko 703: user = urldecode(user);
704: pass = urldecode(pass);
1.8 millert 705: }
1.31 itojun 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;
1.25 itojun 719: } else
720: cp = host;
1.31 itojun 721: #else
722: cp = host;
1.25 itojun 723: #endif
1.31 itojun 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;
1.8 millert 746: } else { /* classic style `host:file' */
747: dir = strchr(host, ':');
748: }
1.1 millert 749: if (EMPTYSTRING(host)) {
750: rval = argpos + 1;
751: continue;
752: }
753:
754: /*
1.9 millert 755: * If dir is NULL, the file wasn't specified
1.1 millert 756: * (URL looked something like ftp://host)
757: */
1.8 millert 758: if (dir != NULL)
759: *dir++ = '\0';
1.1 millert 760:
761: /*
762: * Extract the file and (if present) directory name.
763: */
1.42 deraadt 764: if (!EMPTYSTRING(dir)) {
1.8 millert 765: cp = strrchr(dir, '/');
1.1 millert 766: if (cp != NULL) {
767: *cp++ = '\0';
768: file = cp;
769: } else {
770: file = dir;
771: dir = NULL;
772: }
773: }
774: if (debug)
1.42 deraadt 775: fprintf(ttyout,
776: "user %s:%s host %s port %s dir %s file %s\n",
1.8 millert 777: user, pass, host, portnum, dir, file);
1.1 millert 778:
779: /*
1.49 ! krw 780: * Set up the connection.
1.1 millert 781: */
1.49 ! krw 782: if (connected)
! 783: disconnect(0, NULL);
! 784: xargv[0] = __progname;
! 785: xargv[1] = host;
1.8 millert 786: xargv[2] = NULL;
1.49 ! krw 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);
1.8 millert 801: rval = argpos + 1;
802: continue;
1.1 millert 803: }
1.49 ! krw 804:
! 805: /* Always use binary transfers. */
! 806: setbinary(0, NULL);
1.1 millert 807:
1.4 millert 808: dirhasglob = filehasglob = 0;
809: if (doglob) {
1.42 deraadt 810: if (!EMPTYSTRING(dir) &&
1.4 millert 811: strpbrk(dir, "*?[]{}") != NULL)
812: dirhasglob = 1;
1.42 deraadt 813: if (!EMPTYSTRING(file) &&
1.4 millert 814: strpbrk(file, "*?[]{}") != NULL)
815: filehasglob = 1;
816: }
817:
1.1 millert 818: /* Change directories, if necessary. */
1.42 deraadt 819: if (!EMPTYSTRING(dir) && !dirhasglob) {
1.1 millert 820: xargv[0] = "cd";
821: xargv[1] = dir;
822: xargv[2] = NULL;
823: cd(2, xargv);
1.42 deraadt 824: if (!dirchange) {
1.1 millert 825: rval = argpos + 1;
826: continue;
827: }
828: }
829:
830: if (EMPTYSTRING(file)) {
831: rval = -1;
832: continue;
833: }
834:
1.21 marc 835: if (verbose)
1.10 deraadt 836: fprintf(ttyout, "Retrieving %s/%s\n", dir ? dir : "", file);
1.1 millert 837:
1.4 millert 838: if (dirhasglob) {
839: snprintf(rempath, sizeof(rempath), "%s/%s", dir, file);
840: file = rempath;
841: }
842:
843: /* Fetch the file(s). */
1.10 deraadt 844: xargc = 2;
1.1 millert 845: xargv[0] = "get";
846: xargv[1] = file;
847: xargv[2] = NULL;
1.4 millert 848: if (dirhasglob || filehasglob) {
849: int ointeractive;
850:
851: ointeractive = interactive;
852: interactive = 0;
853: xargv[0] = "mget";
1.10 deraadt 854: mget(xargc, xargv);
1.5 millert 855: interactive = ointeractive;
1.10 deraadt 856: } else {
1.17 millert 857: if (outfile != NULL) {
858: xargv[2] = outfile;
859: xargv[3] = NULL;
1.10 deraadt 860: xargc++;
861: }
862: get(xargc, xargv);
863: }
1.1 millert 864:
1.4 millert 865: if ((code / 100) != COMPLETE)
1.1 millert 866: rval = argpos + 1;
867: }
868: if (connected && rval != -1)
869: disconnect(0, NULL);
870: return (rval);
1.37 heko 871: }
872:
873: char *
1.42 deraadt 874: urldecode(str)
1.37 heko 875: const char *str;
876: {
877: char *ret;
878: char c;
879: int i, reallen;
880:
1.42 deraadt 881: if (str == NULL)
1.37 heko 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;
1.25 itojun 926: }
927:
928: int
929: isurl(p)
930: const char *p;
931: {
1.27 millert 932:
1.26 deraadt 933: if (strncasecmp(p, FTP_URL, sizeof(FTP_URL) - 1) == 0 ||
934: strncasecmp(p, HTTP_URL, sizeof(HTTP_URL) - 1) == 0 ||
1.27 millert 935: strncasecmp(p, FILE_URL, sizeof(FILE_URL) - 1) == 0 ||
936: strstr(p, ":/"))
937: return (1);
938: return (0);
1.1 millert 939: }
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