2 * Copyright (C) 2013-2014 Intel Corporation.
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Library General Public
6 * License as published by the Free Software Foundation; either
7 * version 2 of the License, or (at your option) any later version.
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Library General Public License for more details.
14 * You should have received a copy of the GNU Library General Public
15 * License along with this library; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19 * José Bollo <jose.bollo@open.eurogiciel.org>
20 * Stéphane Desneux <stephane.desneux@open.eurogiciel.org>
21 * Jean-Benoit Martin <jean-benoit.martin@open.eurogiciel.org>
35 #include <sys/types.h>
44 #ifndef NOT_MULTI_THREAD_SAFE
49 #define CONFIGPATH "/etc/tizen-platform.conf"
52 #include "tzplatform_variables.h"
53 #include "tzplatform_config.h"
64 #define _HAS_IDS_ ( _FOREIGN_HAS_(UID) \
65 || _FOREIGN_HAS_(EUID) \
66 || _FOREIGN_HAS_(GID) )
68 #define _HAS_PWS_ ( _FOREIGN_HAS_(HOME) \
69 || _FOREIGN_HAS_(USER) \
70 || _FOREIGN_HAS_(EHOME) \
71 || _FOREIGN_HAS_(EUSER) )
73 /* local and static variables */
74 static const char metafilepath[] = CONFIGPATH;
75 static const char emptystring[] = "";
77 /* structure for reading config files */
80 struct tzplatform_context *context;
81 size_t dynvars[_FOREIGN_COUNT_];
82 size_t offsets[_TZPLATFORM_VARIABLES_COUNT_];
85 /* write the error message */
86 static void writerror( const char *format, ...)
89 fprintf( stderr, "tzplatform_config ERROR: ");
91 vfprintf(stderr, format, ap);
93 fprintf( stderr, "\n");
97 /* fill the foreign variables for ids */
98 static void foreignid( struct reading *reading)
103 #if _FOREIGN_HAS_(UID)
105 if (reading->dynvars[UID] == HNULL) {
106 n = snprintf( buffer, sizeof buffer, "%d", (int)get_uid(reading->context));
107 if (0 < n && n < (int)(sizeof buffer))
108 reading->dynvars[UID] = heap_strndup( &reading->context->heap, buffer, (size_t)n);
112 #if _FOREIGN_HAS_(EUID)
114 if (reading->dynvars[EUID] == HNULL) {
115 n = snprintf( buffer, sizeof buffer, "%d", (int)get_euid(reading->context));
116 if (0 < n && n < (int)(sizeof buffer))
117 reading->dynvars[EUID] = heap_strndup( &reading->context->heap, buffer, (size_t)n);
121 #if _FOREIGN_HAS_(GID)
123 if (reading->dynvars[GID] == HNULL) {
124 n = snprintf( buffer, sizeof buffer, "%d", (int)get_gid(reading->context));
125 if (0 < n && n < (int)(sizeof buffer))
126 reading->dynvars[GID] = heap_strndup( &reading->context->heap, buffer, (size_t)n);
133 /* fill the foreign variables for home and user */
134 static void foreignpw( struct reading *reading)
137 struct pwget *array[3];
138 #if _FOREIGN_HAS_(HOME) || _FOREIGN_HAS_(USER)
142 #if _FOREIGN_HAS_(EHOME) || _FOREIGN_HAS_(EUSER)
147 #if _FOREIGN_HAS_(HOME) || _FOREIGN_HAS_(USER)
149 #if _FOREIGN_HAS_(HOME)
150 reading->dynvars[HOME] == HNULL
152 #if _FOREIGN_HAS_(HOME) && _FOREIGN_HAS_(USER)
155 #if _FOREIGN_HAS_(USER)
156 reading->dynvars[USER] == HNULL
159 snprintf( suid, sizeof suid, "%u", (unsigned)get_uid(reading->context));
169 #if _FOREIGN_HAS_(EHOME) || _FOREIGN_HAS_(EUSER)
171 #if _FOREIGN_HAS_(EHOME)
172 reading->dynvars[EHOME] == HNULL
174 #if _FOREIGN_HAS_(EHOME) && _FOREIGN_HAS_(USER)
177 #if _FOREIGN_HAS_(EUSER)
178 reading->dynvars[EUSER] == HNULL
181 snprintf( seuid, sizeof seuid, "%u", (unsigned)get_euid(reading->context));
193 if (pw_get( &reading->context->heap, array) == 0) {
194 #if _FOREIGN_HAS_(HOME)
196 reading->dynvars[HOME] = uid.home;
198 #if _FOREIGN_HAS_(USER)
200 reading->dynvars[USER] = uid.user;
202 #if _FOREIGN_HAS_(EHOME)
204 reading->dynvars[EHOME] = euid.home;
206 #if _FOREIGN_HAS_(EUSER)
208 reading->dynvars[EUSER] = euid.user;
215 /* get the foreign variable */
216 static const char *foreignvar( struct reading *reading,
217 const char *name, size_t length)
219 enum fkey key = foreign( name, length);
224 #if _FOREIGN_HAS_(HOME)
227 #if _FOREIGN_HAS_(USER)
230 #if _FOREIGN_HAS_(EHOME)
233 #if _FOREIGN_HAS_(EUSER)
241 #if _FOREIGN_HAS_(UID)
244 #if _FOREIGN_HAS_(GID)
247 #if _FOREIGN_HAS_(EUID)
257 offset = reading->dynvars[key];
258 return offset==HNULL ? NULL : heap_address( &reading->context->heap, offset);
261 /* callback for parsing errors */
262 static int errcb( struct parsing *parsing,
263 size_t position, const char *message)
265 struct parsinfo info;
266 struct reading *reading = parsing->data;
268 /* count the error */
271 /* print the error */
272 parse_utf8_info( parsing, &info, position);
273 writerror( "%s (file %s line %d)", message, metafilepath, info.lino);
275 /* continue to parse */
279 /* callback for solving variables */
280 static const char *getcb( struct parsing *parsing,
281 const char *key, size_t length,
282 size_t begin_pos, size_t end_pos)
284 struct parsinfo info;
287 struct reading *reading = parsing->data;
290 /* try to find a tzplatform variable */
291 id = hashid(key, length);
293 /* found: try to use it */
294 offset = reading->offsets[id];
296 result = heap_address( &reading->context->heap, offset);
301 /* that is a foreign variable */
302 result = foreignvar( reading, key, length);
305 /* emit the error and then return */
306 if (result == NULL) {
308 parse_utf8_info( parsing, &info, begin_pos);
309 writerror( "undefined value for %.*s (file %s line %d)",
310 length, key, metafilepath, info.lino);
311 result = emptystring; /* avoid error of the parser */
316 /* callback to define variables */
317 static int putcb( struct parsing *parsing,
318 const char *key, size_t key_length,
319 const char *value, size_t value_length,
320 size_t begin_pos, size_t end_pos)
322 struct parsinfo info;
325 struct reading *reading = parsing->data;
328 /* try to find a tzplatform variable */
329 id = hashid( key, key_length);
331 /* check that the variable isn't already defined */
332 offset = reading->offsets[id];
333 if (offset != HNULL) {
335 parse_utf8_info( parsing, &info, begin_pos);
336 writerror( "redefinition of variable %.*s (file %s line %d)",
337 key_length, key, metafilepath, info.lino);
340 /* allocate the variable value */
341 offset = heap_alloc( &reading->context->heap, value_length+1);
342 if (offset == HNULL) {
343 /* error of allocation */
345 writerror( "out of memory");
348 /* record the variable value */
349 reading->offsets[id] = offset;
350 string = heap_address( &reading->context->heap, offset);
351 memcpy( string, value, value_length);
352 string[value_length] = 0;
356 /* forbidden variable */
357 parse_utf8_info( parsing, &info, begin_pos);
358 writerror( "forbidden variable name %.*s (file %s line %d)",
359 key_length, key, metafilepath, info.lino);
363 /* continue to parse */
367 /* initialize the environment */
368 inline void initialize(struct tzplatform_context *context)
370 struct buffer buffer;
371 struct parsing parsing;
372 struct reading reading;
376 /* clear the variables */
377 reading.errcount = 0;
378 reading.context = context;
379 for (i = 0 ; i < (int)_FOREIGN_COUNT_ ; i++) {
380 reading.dynvars[i] = HNULL;
382 for (i = 0 ; i < (int)_TZPLATFORM_VARIABLES_COUNT_ ; i++) {
383 context->values[i] = NULL;
384 reading.offsets[i] = HNULL;
387 /* read the configuration file */
388 result = buffer_create( &buffer, metafilepath);
390 writerror( "can't read file %s",metafilepath);
391 context->state = ERROR;
395 /* create the heap */
396 result = heap_create( &context->heap, 1);
398 buffer_destroy( &buffer);
399 writerror( "out of memory");
400 context->state = ERROR;
405 parsing.buffer = buffer.buffer;
406 parsing.length = buffer.length;
407 parsing.maximum_data_size = 0;
408 parsing.should_escape = 0;
409 parsing.data = &reading;
412 parsing.error = errcb;
413 result = parse_utf8_config( &parsing);
414 buffer_destroy( &buffer);
415 if (result != 0 || reading.errcount != 0) {
416 writerror( "%d errors while parsing file %s",
417 reading.errcount, metafilepath);
420 /* set the variables */
421 heap_read_only( &context->heap);
422 for (i = 0 ; i < (int)_TZPLATFORM_VARIABLES_COUNT_ ; i++) {
423 offset = reading.offsets[i];
425 context->values[i] = heap_address( &context->heap, offset);
427 writerror( "the variable %s isn't defined in file %s",
428 keyname(i), metafilepath);
429 /* TODO undefined variable */;
431 context->state = VALID;