Return statistics for a DB

Eventually this will have to grow up to be like BDB db_stat...

libraries/libmdb/mdb_stat.c

@@ -0,0 +1,43 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <time.h>
+#include "mdb.h"
+
+int main(int argc,char * argv[])
+{
+	int i = 0, rc;
+	MDB_env *env;
+	MDB_db *db;
+	MDB_stat *mst;
+	char *envname = argv[1];
+	char *subname = NULL;
+
+	if (argc > 2)
+		subname = argv[2];
+   
+	rc = mdbenv_create(&env, 0);
+	rc = mdbenv_open(env, envname, MDB_RDONLY, 0);
+	if (rc) {
+		printf("mdbenv_open failed, error %d\n", rc);
+		exit(1);
+	}
+	rc = mdb_open(env, NULL, NULL, 0, &db);
+	if (rc) {
+		printf("mdb_open failed, error %d\n", rc);
+		exit(1);
+	}
+   
+	rc = mdb_stat(db, &mst);
+	printf("Created at %s", ctime(&mst->ms_created_at));
+	printf("Page size: %u\n", mst->ms_psize);
+	printf("Tree depth: %u\n", mst->ms_depth);
+	printf("Branch pages: %lu\n", mst->ms_branch_pages);
+	printf("Leaf pages: %lu\n", mst->ms_leaf_pages);
+	printf("Overflow pages: %lu\n", mst->ms_overflow_pages);
+	printf("Revisions: %lu\n", mst->ms_revisions);
+	printf("Entries: %lu\n", mst->ms_entries);
+	mdb_close(db);
+	mdbenv_close(env);
+
+	return 0;
+}