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/* mfree.c - memory-mapped database freelist scanner */
* 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
* <>.
#define _XOPEN_SOURCE 500 /* srandom(), random() */
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include "mdb.h"
#include "midl.h"
int main(int argc,char * argv[])
int rc;
MDB_env *env;
MDB_dbi dbi;
MDB_val key, data;
MDB_txn *txn;
MDB_stat mst;
MDB_cursor *cursor;
MDB_ID i, j, *iptr;
if (argc != 2) {
fprintf(stderr, "usage: %s <pathname>\n", argv[0]);
rc = mdb_env_create(&env);
rc = mdb_env_open(env, argv[1], MDB_RDONLY, 0664);
rc = mdb_txn_begin(env, NULL, MDB_RDONLY, &txn);
dbi = 0;
rc = mdb_cursor_open(txn, dbi, &cursor);
while ((rc = mdb_cursor_get(cursor, &key, &data, MDB_NEXT)) == 0) {
printf("key: %p %zu, data: %p\n",
key.mv_data, *(MDB_ID *) key.mv_data,
iptr = data.mv_data;
j = *iptr++;
for (i=0; i<j; i++)
printf(" %zu\n", iptr[i]);
return 0;
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