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https://git.wownero.com/wownero/wownero.git
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136 lines
2.7 KiB
C
136 lines
2.7 KiB
C
/* mdb_drop.c - memory-mapped database delete tool */
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/*
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* Copyright 2016-2018 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 <errno.h>
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#include <stdlib.h>
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#include <string.h>
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#include <ctype.h>
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#include <unistd.h>
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#include <signal.h>
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#include "lmdb.h"
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static volatile sig_atomic_t gotsig;
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static void dumpsig( int sig )
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{
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gotsig=1;
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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 [-V] [-n] [-d] [-s subdb] dbpath\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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char *prog = argv[0];
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char *envname;
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char *subname = NULL;
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int envflags = 0, delete = 0;
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if (argc < 2) {
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usage(prog);
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}
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/* -d: delete the db, don't just empty it
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* -s: drop the named subDB
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* -n: use NOSUBDIR flag on env_open
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* -V: print version and exit
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* (default) empty the main DB
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*/
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while ((i = getopt(argc, argv, "dns:V")) != EOF) {
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switch(i) {
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case 'V':
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printf("%s\n", MDB_VERSION_STRING);
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exit(0);
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break;
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case 'd':
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delete = 1;
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break;
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case 'n':
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envflags |= MDB_NOSUBDIR;
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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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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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#ifdef SIGPIPE
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signal(SIGPIPE, dumpsig);
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#endif
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#ifdef SIGHUP
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signal(SIGHUP, dumpsig);
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#endif
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signal(SIGINT, dumpsig);
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signal(SIGTERM, dumpsig);
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envname = argv[optind];
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rc = mdb_env_create(&env);
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if (rc) {
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fprintf(stderr, "mdb_env_create failed, error %d %s\n", rc, mdb_strerror(rc));
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return EXIT_FAILURE;
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}
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mdb_env_set_maxdbs(env, 2);
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rc = mdb_env_open(env, envname, envflags, 0664);
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if (rc) {
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fprintf(stderr, "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, 0, &txn);
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if (rc) {
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fprintf(stderr, "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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fprintf(stderr, "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_drop(txn, dbi, delete);
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if (rc) {
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fprintf(stderr, "mdb_drop 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_txn_commit(txn);
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if (rc) {
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fprintf(stderr, "mdb_txn_commit failed, error %d %s\n", rc, mdb_strerror(rc));
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goto txn_abort;
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}
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txn = NULL;
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txn_abort:
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if (txn)
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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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