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140 lines
3.1 KiB
140 lines
3.1 KiB
/* mdb_stat.c - memory-mapped database status tool */
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/*
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* Copyright 2011 Howard Chu, Symas Corp.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted only as authorized by the OpenLDAP
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* Public License.
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*
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* A copy of this license is available in the file LICENSE in the
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* top-level directory of the distribution or, alternatively, at
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* <http://www.OpenLDAP.org/license.html>.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include "mdb.h"
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static void prstat(MDB_stat *ms)
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{
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printf("Page size: %u\n", ms->ms_psize);
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printf("Tree depth: %u\n", ms->ms_depth);
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printf("Branch pages: %zu\n", ms->ms_branch_pages);
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printf("Leaf pages: %zu\n", ms->ms_leaf_pages);
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printf("Overflow pages: %zu\n", ms->ms_overflow_pages);
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printf("Entries: %zu\n", ms->ms_entries);
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}
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static void usage(char *prog)
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{
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fprintf(stderr, "usage: %s dbpath [-a|-s subdb]\n", prog);
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exit(EXIT_FAILURE);
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}
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int main(int argc, char *argv[])
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{
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int i, rc;
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MDB_env *env;
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MDB_txn *txn;
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MDB_dbi dbi;
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MDB_stat mst;
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char *prog = argv[0];
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char *envname;
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char *subname = NULL;
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int alldbs = 0;
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if (argc < 2) {
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usage(prog);
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}
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/* -a: print stat of main DB and all subDBs
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* -s: print stat of only the named subDB
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* (default) print stat of only the main DB
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*/
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while ((i = getopt(argc, argv, "as:")) != EOF) {
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switch(i) {
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case 'a':
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alldbs++;
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break;
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case 's':
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subname = optarg;
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break;
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default:
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fprintf(stderr, "%s: unrecognized option -%c\n", prog, optopt);
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usage(prog);
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}
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}
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if (optind != argc - 1)
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usage(prog);
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envname = argv[optind];
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rc = mdb_env_create(&env);
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if (alldbs || subname) {
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mdb_env_set_maxdbs(env, 4);
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}
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rc = mdb_env_open(env, envname, MDB_RDONLY, 0664);
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if (rc) {
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printf("mdb_env_open failed, error %d %s\n", rc, mdb_strerror(rc));
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goto env_close;
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}
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rc = mdb_txn_begin(env, NULL, MDB_RDONLY, &txn);
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if (rc) {
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printf("mdb_txn_begin failed, error %d %s\n", rc, mdb_strerror(rc));
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goto env_close;
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}
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rc = mdb_open(txn, subname, 0, &dbi);
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if (rc) {
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printf("mdb_open failed, error %d %s\n", rc, mdb_strerror(rc));
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goto txn_abort;
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}
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rc = mdb_stat(txn, dbi, &mst);
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if (rc) {
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printf("mdb_stat failed, error %d %s\n", rc, mdb_strerror(rc));
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goto txn_abort;
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}
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prstat(&mst);
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if (alldbs) {
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MDB_cursor *cursor;
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MDB_val key;
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rc = mdb_cursor_open(txn, dbi, &cursor);
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if (rc) {
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printf("mdb_cursor_open failed, error %d %s\n", rc, mdb_strerror(rc));
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goto txn_abort;
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}
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while ((rc = mdb_cursor_get(cursor, &key, NULL, MDB_NEXT)) == 0) {
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char *str = malloc(key.mv_size+1);
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MDB_dbi db2;
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memcpy(str, key.mv_data, key.mv_size);
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str[key.mv_size] = '\0';
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rc = mdb_open(txn, str, 0, &db2);
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if (rc == MDB_SUCCESS)
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printf("\n%s\n", str);
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free(str);
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if (rc) continue;
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rc = mdb_stat(txn, db2, &mst);
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if (rc) {
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printf("mdb_stat failed, error %d %s\n", rc, mdb_strerror(rc));
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goto txn_abort;
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}
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prstat(&mst);
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mdb_close(env, db2);
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}
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mdb_cursor_close(cursor);
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}
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mdb_close(env, dbi);
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txn_abort:
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mdb_txn_abort(txn);
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env_close:
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mdb_env_close(env);
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return rc ? EXIT_FAILURE : EXIT_SUCCESS;
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}
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