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-rw-r--r--libraries/liblmdb/mdb_stat.c263
1 files changed, 263 insertions, 0 deletions
diff --git a/libraries/liblmdb/mdb_stat.c b/libraries/liblmdb/mdb_stat.c
new file mode 100644
index 0000000..cb73e11
--- /dev/null
+++ b/libraries/liblmdb/mdb_stat.c
@@ -0,0 +1,263 @@
+/* mdb_stat.c - memory-mapped database status tool */
+/*
+ * Copyright 2011-2020 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 <unistd.h>
+#include "lmdb.h"
+
+#ifdef _WIN32
+#define Z "I"
+#else
+#define Z "z"
+#endif
+
+static void prstat(MDB_stat *ms)
+{
+#if 0
+ printf(" Page size: %u\n", ms->ms_psize);
+#endif
+ printf(" Tree depth: %u\n", ms->ms_depth);
+ printf(" Branch pages: %"Z"u\n", ms->ms_branch_pages);
+ printf(" Leaf pages: %"Z"u\n", ms->ms_leaf_pages);
+ printf(" Overflow pages: %"Z"u\n", ms->ms_overflow_pages);
+ printf(" Entries: %"Z"u\n", ms->ms_entries);
+}
+
+static void usage(char *prog)
+{
+ fprintf(stderr, "usage: %s [-V] [-n] [-e] [-r[r]] [-f[f[f]]] [-a|-s subdb] dbpath\n", prog);
+ exit(EXIT_FAILURE);
+}
+
+int main(int argc, char *argv[])
+{
+ int i, rc;
+ MDB_env *env;
+ MDB_txn *txn;
+ MDB_dbi dbi;
+ MDB_stat mst;
+ MDB_envinfo mei;
+ char *prog = argv[0];
+ char *envname;
+ char *subname = NULL;
+ int alldbs = 0, envinfo = 0, envflags = 0, freinfo = 0, rdrinfo = 0;
+
+ if (argc < 2) {
+ usage(prog);
+ }
+
+ /* -a: print stat of main DB and all subDBs
+ * -s: print stat of only the named subDB
+ * -e: print env info
+ * -f: print freelist info
+ * -r: print reader info
+ * -n: use NOSUBDIR flag on env_open
+ * -V: print version and exit
+ * (default) print stat of only the main DB
+ */
+ while ((i = getopt(argc, argv, "Vaefnrs:")) != EOF) {
+ switch(i) {
+ case 'V':
+ printf("%s\n", MDB_VERSION_STRING);
+ exit(0);
+ break;
+ case 'a':
+ if (subname)
+ usage(prog);
+ alldbs++;
+ break;
+ case 'e':
+ envinfo++;
+ break;
+ case 'f':
+ freinfo++;
+ break;
+ case 'n':
+ envflags |= MDB_NOSUBDIR;
+ break;
+ case 'r':
+ rdrinfo++;
+ break;
+ case 's':
+ if (alldbs)
+ usage(prog);
+ subname = optarg;
+ break;
+ default:
+ usage(prog);
+ }
+ }
+
+ if (optind != argc - 1)
+ usage(prog);
+
+ envname = argv[optind];
+ rc = mdb_env_create(&env);
+ if (rc) {
+ fprintf(stderr, "mdb_env_create failed, error %d %s\n", rc, mdb_strerror(rc));
+ return EXIT_FAILURE;
+ }
+
+ if (alldbs || subname) {
+ mdb_env_set_maxdbs(env, 4);
+ }
+
+ rc = mdb_env_open(env, envname, envflags | MDB_RDONLY, 0664);
+ if (rc) {
+ fprintf(stderr, "mdb_env_open failed, error %d %s\n", rc, mdb_strerror(rc));
+ goto env_close;
+ }
+
+ if (envinfo) {
+ (void)mdb_env_stat(env, &mst);
+ (void)mdb_env_info(env, &mei);
+ printf("Environment Info\n");
+ printf(" Map address: %p\n", mei.me_mapaddr);
+ printf(" Map size: %"Z"u\n", mei.me_mapsize);
+ printf(" Page size: %u\n", mst.ms_psize);
+ printf(" Max pages: %"Z"u\n", mei.me_mapsize / mst.ms_psize);
+ printf(" Number of pages used: %"Z"u\n", mei.me_last_pgno+1);
+ printf(" Last transaction ID: %"Z"u\n", mei.me_last_txnid);
+ printf(" Max readers: %u\n", mei.me_maxreaders);
+ printf(" Number of readers used: %u\n", mei.me_numreaders);
+ }
+
+ if (rdrinfo) {
+ printf("Reader Table Status\n");
+ rc = mdb_reader_list(env, (MDB_msg_func *)fputs, stdout);
+ if (rdrinfo > 1) {
+ int dead;
+ mdb_reader_check(env, &dead);
+ printf(" %d stale readers cleared.\n", dead);
+ rc = mdb_reader_list(env, (MDB_msg_func *)fputs, stdout);
+ }
+ if (!(subname || alldbs || freinfo))
+ goto env_close;
+ }
+
+ rc = mdb_txn_begin(env, NULL, MDB_RDONLY, &txn);
+ if (rc) {
+ fprintf(stderr, "mdb_txn_begin failed, error %d %s\n", rc, mdb_strerror(rc));
+ goto env_close;
+ }
+
+ if (freinfo) {
+ MDB_cursor *cursor;
+ MDB_val key, data;
+ size_t pages = 0, *iptr;
+
+ printf("Freelist Status\n");
+ dbi = 0;
+ rc = mdb_cursor_open(txn, dbi, &cursor);
+ if (rc) {
+ fprintf(stderr, "mdb_cursor_open failed, error %d %s\n", rc, mdb_strerror(rc));
+ goto txn_abort;
+ }
+ rc = mdb_stat(txn, dbi, &mst);
+ if (rc) {
+ fprintf(stderr, "mdb_stat failed, error %d %s\n", rc, mdb_strerror(rc));
+ goto txn_abort;
+ }
+ prstat(&mst);
+ while ((rc = mdb_cursor_get(cursor, &key, &data, MDB_NEXT)) == 0) {
+ iptr = data.mv_data;
+ pages += *iptr;
+ if (freinfo > 1) {
+ char *bad = "";
+ size_t pg, prev;
+ ssize_t i, j, span = 0;
+ j = *iptr++;
+ for (i = j, prev = 1; --i >= 0; ) {
+ pg = iptr[i];
+ if (pg <= prev)
+ bad = " [bad sequence]";
+ prev = pg;
+ pg += span;
+ for (; i >= span && iptr[i-span] == pg; span++, pg++) ;
+ }
+ printf(" Transaction %"Z"u, %"Z"d pages, maxspan %"Z"d%s\n",
+ *(size_t *)key.mv_data, j, span, bad);
+ if (freinfo > 2) {
+ for (--j; j >= 0; ) {
+ pg = iptr[j];
+ for (span=1; --j >= 0 && iptr[j] == pg+span; span++) ;
+ printf(span>1 ? " %9"Z"u[%"Z"d]\n" : " %9"Z"u\n",
+ pg, span);
+ }
+ }
+ }
+ }
+ mdb_cursor_close(cursor);
+ printf(" Free pages: %"Z"u\n", pages);
+ }
+
+ rc = mdb_open(txn, subname, 0, &dbi);
+ if (rc) {
+ fprintf(stderr, "mdb_open failed, error %d %s\n", rc, mdb_strerror(rc));
+ goto txn_abort;
+ }
+
+ rc = mdb_stat(txn, dbi, &mst);
+ if (rc) {
+ fprintf(stderr, "mdb_stat failed, error %d %s\n", rc, mdb_strerror(rc));
+ goto txn_abort;
+ }
+ printf("Status of %s\n", subname ? subname : "Main DB");
+ prstat(&mst);
+
+ if (alldbs) {
+ MDB_cursor *cursor;
+ MDB_val key;
+
+ rc = mdb_cursor_open(txn, dbi, &cursor);
+ if (rc) {
+ fprintf(stderr, "mdb_cursor_open failed, error %d %s\n", rc, mdb_strerror(rc));
+ goto txn_abort;
+ }
+ while ((rc = mdb_cursor_get(cursor, &key, NULL, MDB_NEXT_NODUP)) == 0) {
+ char *str;
+ MDB_dbi db2;
+ if (memchr(key.mv_data, '\0', key.mv_size))
+ continue;
+ str = malloc(key.mv_size+1);
+ memcpy(str, key.mv_data, key.mv_size);
+ str[key.mv_size] = '\0';
+ rc = mdb_open(txn, str, 0, &db2);
+ if (rc == MDB_SUCCESS)
+ printf("Status of %s\n", str);
+ free(str);
+ if (rc) continue;
+ rc = mdb_stat(txn, db2, &mst);
+ if (rc) {
+ fprintf(stderr, "mdb_stat failed, error %d %s\n", rc, mdb_strerror(rc));
+ goto txn_abort;
+ }
+ prstat(&mst);
+ mdb_close(env, db2);
+ }
+ mdb_cursor_close(cursor);
+ }
+
+ if (rc == MDB_NOTFOUND)
+ rc = MDB_SUCCESS;
+
+ mdb_close(env, dbi);
+txn_abort:
+ mdb_txn_abort(txn);
+env_close:
+ mdb_env_close(env);
+
+ return rc ? EXIT_FAILURE : EXIT_SUCCESS;
+}
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