/* vi: set sw=4 ts=4: *//* * cache.c - allocation/initialization/free routines for cache * * Copyright (C) 2001 Andreas Dilger * Copyright (C) 2003 Theodore Ts'o * * %Begin-Header% * This file may be redistributed under the terms of the * GNU Lesser General Public License. * %End-Header% */#include <stdlib.h>#include <string.h>#include <unistd.h>#include "blkidP.h"int blkid_debug_mask = 0;int blkid_get_cache(blkid_cache *ret_cache, const char *filename){	blkid_cache cache;#ifdef CONFIG_BLKID_DEBUG	if (!(blkid_debug_mask & DEBUG_INIT)) {		char *dstr = getenv("BLKID_DEBUG");		if (dstr)			blkid_debug_mask = strtoul(dstr, 0, 0);		blkid_debug_mask |= DEBUG_INIT;	}#endif	DBG(DEBUG_CACHE, printf("creating blkid cache (using %s)\n",				filename ? filename : "default cache"));	if (!(cache = (blkid_cache) calloc(1, sizeof(struct blkid_struct_cache))))		return -BLKID_ERR_MEM;	INIT_LIST_HEAD(&cache->bic_devs);	INIT_LIST_HEAD(&cache->bic_tags);	if (filename && !strlen(filename))		filename = 0;	if (!filename && (getuid() == geteuid()))		filename = getenv("BLKID_FILE");	if (!filename)		filename = BLKID_CACHE_FILE;	cache->bic_filename = blkid_strdup(filename);	blkid_read_cache(cache);	*ret_cache = cache;	return 0;}void blkid_put_cache(blkid_cache cache){	if (!cache)		return;	(void) blkid_flush_cache(cache);	DBG(DEBUG_CACHE, printf("freeing cache struct\n"));	/* DBG(DEBUG_CACHE, blkid_debug_dump_cache(cache)); */	while (!list_empty(&cache->bic_devs)) {		blkid_dev dev = list_entry(cache->bic_devs.next,					   struct blkid_struct_dev,					    bid_devs);		blkid_free_dev(dev);	}	while (!list_empty(&cache->bic_tags)) {		blkid_tag tag = list_entry(cache->bic_tags.next,					   struct blkid_struct_tag,					   bit_tags);		while (!list_empty(&tag->bit_names)) {			blkid_tag bad = list_entry(tag->bit_names.next,						   struct blkid_struct_tag,						   bit_names);			DBG(DEBUG_CACHE, printf("warning: unfreed tag %s=%s\n",						bad->bit_name, bad->bit_val));			blkid_free_tag(bad);		}		blkid_free_tag(tag);	}	free(cache->bic_filename);	free(cache);}#ifdef TEST_PROGRAMint main(int argc, char** argv){	blkid_cache cache = NULL;	int ret;	blkid_debug_mask = DEBUG_ALL;	if ((argc > 2)) {		fprintf(stderr, "Usage: %s [filename]\n", argv[0]);		exit(1);	}	if ((ret = blkid_get_cache(&cache, argv[1])) < 0) {		fprintf(stderr, "error %d parsing cache file %s\n", ret,			argv[1] ? argv[1] : BLKID_CACHE_FILE);		exit(1);	}	if ((ret = blkid_get_cache(&cache, bb_dev_null)) != 0) {		fprintf(stderr, "%s: error creating cache (%d)\n",			argv[0], ret);		exit(1);	}	if ((ret = blkid_probe_all(cache) < 0))		fprintf(stderr, "error probing devices\n");	blkid_put_cache(cache);	return ret;}#endif