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3 Copyright (C) 2001, 2002, 2004, 2005, 2006, 2007, 2009 GNUnet e.V.
5 GNUnet is free software: you can redistribute it and/or modify it
6 under the terms of the GNU Affero General Public License as published
7 by the Free Software Foundation, either version 3 of the License,
8 or (at your option) any later version.
10 GNUnet is distributed in the hope that it will be useful, but
11 WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Affero General Public License for more details.
15 You should have received a copy of the GNU Affero General Public License
16 along with this program. If not, see <http://www.gnu.org/licenses/>.
18 SPDX-License-Identifier: AGPL3.0-or-later
21 * @file fs/gnunet-search.c
22 * @brief searching for files on GNUnet
23 * @author Christian Grothoff
24 * @author Krista Bennett
25 * @author James Blackwell
26 * @author Igor Wronsky
29 #include "gnunet_fs_service.h"
33 static const struct GNUNET_CONFIGURATION_Handle *cfg;
35 static struct GNUNET_FS_Handle *ctx;
37 static struct GNUNET_FS_SearchContext *sc;
39 static char *output_filename;
41 static struct GNUNET_FS_DirectoryBuilder *db;
43 static unsigned int anonymity = 1;
46 * Timeout for the search, 0 means to wait for CTRL-C.
48 static struct GNUNET_TIME_Relative timeout;
50 static unsigned int results_limit;
52 static unsigned int results;
54 static unsigned int verbose;
56 static int local_only;
58 static struct GNUNET_SCHEDULER_Task *tt;
62 * Type of a function that libextractor calls for each
63 * meta data item found.
65 * @param cls closure (user-defined, unused)
66 * @param plugin_name name of the plugin that produced this value;
67 * special values can be used (i.e. '<zlib>' for zlib being
68 * used in the main libextractor library and yielding
70 * @param type libextractor-type describing the meta data
71 * @param format basic format information about data
72 * @param data_mime_type mime-type of data (not of the original file);
73 * can be NULL (if mime-type is not known)
74 * @param data actual meta-data found
75 * @param data_size number of bytes in @a data
76 * @return 0 to continue extracting, 1 to abort
79 item_printer (void *cls,
80 const char *plugin_name,
81 enum EXTRACTOR_MetaType type,
82 enum EXTRACTOR_MetaFormat format,
83 const char *data_mime_type,
87 if ((format != EXTRACTOR_METAFORMAT_UTF8) &&
88 (format != EXTRACTOR_METAFORMAT_C_STRING))
90 if (type == EXTRACTOR_METATYPE_GNUNET_ORIGINAL_FILENAME)
93 printf ("\t%20s: %s\n",
94 dgettext (LIBEXTRACTOR_GETTEXT_DOMAIN,
95 EXTRACTOR_metatype_to_string (type)), data);
97 printf ("\t%20d: %s\n",
106 clean_task (void *cls)
111 GNUNET_FS_stop (ctx);
113 if (output_filename == NULL)
115 if (GNUNET_OK != GNUNET_FS_directory_builder_finish (db, &dsize, &ddata))
118 GNUNET_free (output_filename);
122 GNUNET_DISK_fn_write (output_filename, ddata, dsize,
123 GNUNET_DISK_PERM_USER_READ |
124 GNUNET_DISK_PERM_USER_WRITE))
127 _("Failed to write directory with search results to `%s'\n"),
130 GNUNET_free_non_null (ddata);
131 GNUNET_free (output_filename);
136 * Called by FS client to give information about the progress of an
140 * @param info details about the event, specifying the event type
141 * and various bits about the event
142 * @return client-context (for the next progress call
143 * for this operation; should be set to NULL for
144 * SUSPEND and STOPPED events). The value returned
145 * will be passed to future callbacks in the respective
146 * field in the GNUNET_FS_ProgressInfo struct.
149 progress_cb (void *cls, const struct GNUNET_FS_ProgressInfo *info)
151 static unsigned int cnt;
156 switch (info->status)
158 case GNUNET_FS_STATUS_SEARCH_START:
160 case GNUNET_FS_STATUS_SEARCH_RESULT:
162 GNUNET_FS_directory_builder_add (db,
163 info->value.search.specifics.result.uri,
164 info->value.search.specifics.result.meta,
166 uri = GNUNET_FS_uri_to_string (info->value.search.specifics.result.uri);
167 printf ("#%u:\n", ++cnt);
169 GNUNET_CONTAINER_meta_data_get_by_type (info->value.search.
170 specifics.result.meta,
171 EXTRACTOR_METATYPE_GNUNET_ORIGINAL_FILENAME);
173 GNUNET_FS_meta_data_test_for_directory (info->value.search.
174 specifics.result.meta);
175 if (NULL != filename)
177 while ( (filename[0] != '\0') &&
178 ('/' == filename[strlen(filename)-1]) )
179 filename[strlen(filename)-1] = '\0';
180 GNUNET_DISK_filename_canonicalize (filename);
181 if (GNUNET_YES == is_directory)
182 printf ("gnunet-download -o \"%s%s\" -R %s\n", filename, GNUNET_FS_DIRECTORY_EXT, uri);
184 printf ("gnunet-download -o \"%s\" %s\n", filename, uri);
186 else if (GNUNET_YES == is_directory)
187 printf ("gnunet-download -o \"collection%s\" -R %s\n", GNUNET_FS_DIRECTORY_EXT, uri);
189 printf ("gnunet-download %s\n", uri);
191 GNUNET_CONTAINER_meta_data_iterate (info->value.search.specifics.
192 result.meta, &item_printer, NULL);
195 GNUNET_free_non_null (filename);
198 if ((results_limit > 0) && (results >= results_limit))
199 GNUNET_SCHEDULER_shutdown ();
201 case GNUNET_FS_STATUS_SEARCH_UPDATE:
203 case GNUNET_FS_STATUS_SEARCH_RESULT_STOPPED:
206 case GNUNET_FS_STATUS_SEARCH_ERROR:
207 FPRINTF (stderr, _("Error searching: %s.\n"),
208 info->value.search.specifics.error.message);
209 GNUNET_SCHEDULER_shutdown ();
211 case GNUNET_FS_STATUS_SEARCH_STOPPED:
212 GNUNET_SCHEDULER_add_now (&clean_task, NULL);
215 FPRINTF (stderr, _("Unexpected status: %d\n"), info->status);
223 shutdown_task (void *cls)
227 GNUNET_FS_search_stop (sc);
234 timeout_task (void *cls)
237 GNUNET_SCHEDULER_shutdown ();
242 * Main function that will be run by the scheduler.
245 * @param args remaining command-line arguments
246 * @param cfgfile name of the configuration file used (for saving, can be NULL!)
247 * @param c configuration
250 run (void *cls, char *const *args, const char *cfgfile,
251 const struct GNUNET_CONFIGURATION_Handle *c)
253 struct GNUNET_FS_Uri *uri;
255 enum GNUNET_FS_SearchOptions options;
258 while (NULL != args[argc])
260 uri = GNUNET_FS_uri_ksk_create_from_args (argc, (const char **) args);
263 FPRINTF (stderr, "%s", _("Could not create keyword URI from arguments.\n"));
269 GNUNET_FS_start (cfg, "gnunet-search", &progress_cb, NULL,
270 GNUNET_FS_FLAGS_NONE, GNUNET_FS_OPTIONS_END);
273 FPRINTF (stderr, _("Could not initialize `%s' subsystem.\n"), "FS");
274 GNUNET_FS_uri_destroy (uri);
278 if (output_filename != NULL)
279 db = GNUNET_FS_directory_builder_create (NULL);
280 options = GNUNET_FS_SEARCH_OPTION_NONE;
282 options |= GNUNET_FS_SEARCH_OPTION_LOOPBACK_ONLY;
283 sc = GNUNET_FS_search_start (ctx, uri, anonymity, options, NULL);
284 GNUNET_FS_uri_destroy (uri);
287 FPRINTF (stderr, "%s", _("Could not start searching.\n"));
288 GNUNET_FS_stop (ctx);
292 if (0 != timeout.rel_value_us)
293 tt = GNUNET_SCHEDULER_add_delayed (timeout,
296 GNUNET_SCHEDULER_add_shutdown (&shutdown_task,
302 * The main function to search GNUnet.
304 * @param argc number of arguments from the command line
305 * @param argv command line arguments
306 * @return 0 ok, 1 on error
309 main (int argc, char *const *argv)
311 struct GNUNET_GETOPT_CommandLineOption options[] = {
312 GNUNET_GETOPT_option_uint ('a',
315 gettext_noop ("set the desired LEVEL of receiver-anonymity"),
317 GNUNET_GETOPT_option_flag ('n',
319 gettext_noop ("only search the local peer (no P2P network search)"),
321 GNUNET_GETOPT_option_string ('o',
324 gettext_noop ("write search results to file starting with PREFIX"),
326 GNUNET_GETOPT_option_relative_time ('t',
329 gettext_noop ("automatically terminate search after DELAY"),
331 GNUNET_GETOPT_option_verbose (&verbose),
332 GNUNET_GETOPT_option_uint ('N',
335 gettext_noop ("automatically terminate search "
336 "after VALUE results are found"),
338 GNUNET_GETOPT_OPTION_END
342 GNUNET_STRINGS_get_utf8_args (argc, argv,
347 GNUNET_PROGRAM_run (argc,
349 "gnunet-search [OPTIONS] KEYWORD",
351 ("Search GNUnet for files that were published on GNUnet"),
352 options, &run, NULL)) ? ret : 1;
353 GNUNET_free ((void*) argv);
357 /* end of gnunet-search.c */