1 files changed, 126 insertions, 0 deletions
diff --git a/e2fsprogs/blkid/cache.c b/e2fsprogs/blkid/cache.c
new file mode 100644
index 000000000..88cc326cc
--- /dev/null
+++ b/e2fsprogs/blkid/cache.c
@@ -0,0 +1,126 @@
+/*
+ * 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"));
+	
+	/* DEB_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);
+	}
+	if (cache->bic_filename)
+		free(cache->bic_filename);
+	
+	free(cache);
+}
+
+#ifdef TEST_PROGRAM
+int 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, "/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