Loop thru all DBs and show their stats

This is quick and dirty, should be integrated into mdb_stat.

diff --git a/libraries/libmdb/mdb_stata.c b/libraries/libmdb/mdb_stata.c
new file mode 100644 (file)
index 0000000..106cb8e
--- /dev/null
+++ b/libraries/libmdb/mdb_stata.c
@@ -0,0 +1,82 @@
+/* mdb_stat.c - memory-mapped database status tool */
+/*
+ * Copyright 2011 Howard Chu, Symas Corp.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted only as authorized by the OpenLDAP
+ * Public License.
+ *
+ * A copy of this license is available in the file LICENSE in the
+ * top-level directory of the distribution or, alternatively, at
+ * <http://www.OpenLDAP.org/license.html>.
+ */
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include "mdb.h"
+
+int main(int argc,char * argv[])
+{
+       int rc;
+       MDB_env *env;
+       MDB_txn *txn;
+       MDB_dbi dbi;
+       MDB_stat mst;
+       MDB_cursor *cursor;
+       MDB_val key;
+       char *envname = argv[1];
+
+       rc = mdb_env_create(&env);
+
+       mdb_env_set_maxdbs(env, 4);
+
+       rc = mdb_env_open(env, envname, MDB_RDONLY, 0);
+       if (rc) {
+               printf("mdb_env_open failed, error %d\n", rc);
+               exit(1);
+       }
+       rc = mdb_txn_begin(env, NULL, 1, &txn);
+       if (rc) {
+               printf("mdb_txn_begin failed, error %d\n", rc);
+               exit(1);
+       }
+       rc = mdb_open(txn, NULL, 0, &dbi);
+       if (rc) {
+               printf("mdb_open failed, error %d\n", rc);
+               exit(1);
+       }
+   
+       rc = mdb_stat(txn, dbi, &mst);
+       printf("Page size: %u\n", mst.ms_psize);
+       printf("Tree depth: %u\n", mst.ms_depth);
+       printf("Branch pages: %zu\n", mst.ms_branch_pages);
+       printf("Leaf pages: %zu\n", mst.ms_leaf_pages);
+       printf("Overflow pages: %zu\n", mst.ms_overflow_pages);
+       printf("Entries: %zu\n", mst.ms_entries);
+
+       rc = mdb_cursor_open(txn, dbi, &cursor);
+       while ((rc = mdb_cursor_get(cursor, &key, NULL, MDB_NEXT)) == 0) {
+               char *str = malloc(key.mv_size+1);
+               MDB_dbi db2;
+               memcpy(str, key.mv_data, key.mv_size);
+               str[key.mv_size] = '\0';
+               printf("\n%s\n", str);
+               rc = mdb_open(txn, str, 0, &db2);
+               if (rc) break;
+               free(str);
+               rc = mdb_stat(txn, db2, &mst);
+               printf("Tree depth: %u\n", mst.ms_depth);
+               printf("Branch pages: %zu\n", mst.ms_branch_pages);
+               printf("Leaf pages: %zu\n", mst.ms_leaf_pages);
+               printf("Overflow pages: %zu\n", mst.ms_overflow_pages);
+               printf("Entries: %zu\n", mst.ms_entries);
+               mdb_close(env, db2);
+       }
+       mdb_cursor_close(cursor);
+       mdb_close(env, dbi);
+       mdb_txn_abort(txn);
+       mdb_env_close(env);
+
+       return 0;
+}