[821] | 1 | /*
|
---|
| 2 | * cache.c - allocation/initialization/free routines for cache
|
---|
| 3 | *
|
---|
| 4 | * Copyright (C) 2001 Andreas Dilger
|
---|
| 5 | * Copyright (C) 2003 Theodore Ts'o
|
---|
| 6 | *
|
---|
| 7 | * %Begin-Header%
|
---|
| 8 | * This file may be redistributed under the terms of the
|
---|
| 9 | * GNU Lesser General Public License.
|
---|
| 10 | * %End-Header%
|
---|
| 11 | */
|
---|
| 12 |
|
---|
| 13 | #include <stdlib.h>
|
---|
| 14 | #include <string.h>
|
---|
| 15 | #include <unistd.h>
|
---|
| 16 | #include "blkidP.h"
|
---|
| 17 |
|
---|
| 18 | int blkid_debug_mask = 0;
|
---|
| 19 |
|
---|
| 20 | int blkid_get_cache(blkid_cache *ret_cache, const char *filename)
|
---|
| 21 | {
|
---|
| 22 | blkid_cache cache;
|
---|
| 23 |
|
---|
| 24 | #ifdef CONFIG_BLKID_DEBUG
|
---|
| 25 | if (!(blkid_debug_mask & DEBUG_INIT)) {
|
---|
| 26 | char *dstr = getenv("BLKID_DEBUG");
|
---|
| 27 |
|
---|
| 28 | if (dstr)
|
---|
| 29 | blkid_debug_mask = strtoul(dstr, 0, 0);
|
---|
| 30 | blkid_debug_mask |= DEBUG_INIT;
|
---|
| 31 | }
|
---|
| 32 | #endif
|
---|
| 33 |
|
---|
| 34 | DBG(DEBUG_CACHE, printf("creating blkid cache (using %s)\n",
|
---|
| 35 | filename ? filename : "default cache"));
|
---|
| 36 |
|
---|
| 37 | if (!(cache = (blkid_cache) calloc(1, sizeof(struct blkid_struct_cache))))
|
---|
| 38 | return -BLKID_ERR_MEM;
|
---|
| 39 |
|
---|
| 40 | INIT_LIST_HEAD(&cache->bic_devs);
|
---|
| 41 | INIT_LIST_HEAD(&cache->bic_tags);
|
---|
| 42 |
|
---|
| 43 | if (filename && !strlen(filename))
|
---|
| 44 | filename = 0;
|
---|
| 45 | if (!filename && (getuid() == geteuid()))
|
---|
| 46 | filename = getenv("BLKID_FILE");
|
---|
| 47 | if (!filename)
|
---|
| 48 | filename = BLKID_CACHE_FILE;
|
---|
| 49 | cache->bic_filename = blkid_strdup(filename);
|
---|
| 50 |
|
---|
| 51 | blkid_read_cache(cache);
|
---|
| 52 |
|
---|
| 53 | *ret_cache = cache;
|
---|
| 54 | return 0;
|
---|
| 55 | }
|
---|
| 56 |
|
---|
| 57 | void blkid_put_cache(blkid_cache cache)
|
---|
| 58 | {
|
---|
| 59 | if (!cache)
|
---|
| 60 | return;
|
---|
| 61 |
|
---|
| 62 | (void) blkid_flush_cache(cache);
|
---|
| 63 |
|
---|
| 64 | DBG(DEBUG_CACHE, printf("freeing cache struct\n"));
|
---|
| 65 |
|
---|
| 66 | /* DBG(DEBUG_CACHE, blkid_debug_dump_cache(cache)); */
|
---|
| 67 |
|
---|
| 68 | while (!list_empty(&cache->bic_devs)) {
|
---|
| 69 | blkid_dev dev = list_entry(cache->bic_devs.next,
|
---|
| 70 | struct blkid_struct_dev,
|
---|
| 71 | bid_devs);
|
---|
| 72 | blkid_free_dev(dev);
|
---|
| 73 | }
|
---|
| 74 |
|
---|
| 75 | while (!list_empty(&cache->bic_tags)) {
|
---|
| 76 | blkid_tag tag = list_entry(cache->bic_tags.next,
|
---|
| 77 | struct blkid_struct_tag,
|
---|
| 78 | bit_tags);
|
---|
| 79 |
|
---|
| 80 | while (!list_empty(&tag->bit_names)) {
|
---|
| 81 | blkid_tag bad = list_entry(tag->bit_names.next,
|
---|
| 82 | struct blkid_struct_tag,
|
---|
| 83 | bit_names);
|
---|
| 84 |
|
---|
| 85 | DBG(DEBUG_CACHE, printf("warning: unfreed tag %s=%s\n",
|
---|
| 86 | bad->bit_name, bad->bit_val));
|
---|
| 87 | blkid_free_tag(bad);
|
---|
| 88 | }
|
---|
| 89 | blkid_free_tag(tag);
|
---|
| 90 | }
|
---|
| 91 | free(cache->bic_filename);
|
---|
| 92 |
|
---|
| 93 | free(cache);
|
---|
| 94 | }
|
---|
| 95 |
|
---|
| 96 | #ifdef TEST_PROGRAM
|
---|
| 97 | int main(int argc, char** argv)
|
---|
| 98 | {
|
---|
| 99 | blkid_cache cache = NULL;
|
---|
| 100 | int ret;
|
---|
| 101 |
|
---|
| 102 | blkid_debug_mask = DEBUG_ALL;
|
---|
| 103 | if ((argc > 2)) {
|
---|
| 104 | fprintf(stderr, "Usage: %s [filename] \n", argv[0]);
|
---|
| 105 | exit(1);
|
---|
| 106 | }
|
---|
| 107 |
|
---|
| 108 | if ((ret = blkid_get_cache(&cache, argv[1])) < 0) {
|
---|
| 109 | fprintf(stderr, "error %d parsing cache file %s\n", ret,
|
---|
| 110 | argv[1] ? argv[1] : BLKID_CACHE_FILE);
|
---|
| 111 | exit(1);
|
---|
| 112 | }
|
---|
| 113 | if ((ret = blkid_get_cache(&cache, bb_dev_null)) != 0) {
|
---|
| 114 | fprintf(stderr, "%s: error creating cache (%d)\n",
|
---|
| 115 | argv[0], ret);
|
---|
| 116 | exit(1);
|
---|
| 117 | }
|
---|
| 118 | if ((ret = blkid_probe_all(cache) < 0))
|
---|
| 119 | fprintf(stderr, "error probing devices\n");
|
---|
| 120 |
|
---|
| 121 | blkid_put_cache(cache);
|
---|
| 122 |
|
---|
| 123 | return ret;
|
---|
| 124 | }
|
---|
| 125 | #endif
|
---|