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/* mdb_drop.c - memory-mapped database delete tool */
/*
* Copyright 2016-2017 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 <errno.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <unistd.h>
#include <signal.h>
#include "lmdb.h"
static volatile sig_atomic_t gotsig;
static void dumpsig( int sig )
{
gotsig=1;
}
static void usage(char *prog)
{
fprintf(stderr, "usage: %s [-V] [-n] [-d] [-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;
char *prog = argv[0];
char *envname;
char *subname = NULL;
int envflags = 0, delete = 0;
if (argc < 2) {
usage(prog);
}
/* -d: delete the db, don't just empty it
* -s: drop the named subDB
* -n: use NOSUBDIR flag on env_open
* -V: print version and exit
* (default) empty the main DB
*/
while ((i = getopt(argc, argv, "dns:V")) != EOF) {
switch(i) {
case 'V':
printf("%s\n", MDB_VERSION_STRING);
exit(0);
break;
case 'd':
delete = 1;
break;
case 'n':
envflags |= MDB_NOSUBDIR;
break;
case 's':
subname = optarg;
break;
default:
usage(prog);
}
}
if (optind != argc - 1)
usage(prog);
#ifdef SIGPIPE
signal(SIGPIPE, dumpsig);
#endif
#ifdef SIGHUP
signal(SIGHUP, dumpsig);
#endif
signal(SIGINT, dumpsig);
signal(SIGTERM, dumpsig);
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;
}
mdb_env_set_maxdbs(env, 2);
rc = mdb_env_open(env, envname, envflags, 0664);
if (rc) {
fprintf(stderr, "mdb_env_open failed, error %d %s\n", rc, mdb_strerror(rc));
goto env_close;
}
rc = mdb_txn_begin(env, NULL, 0, &txn);
if (rc) {
fprintf(stderr, "mdb_txn_begin failed, error %d %s\n", rc, mdb_strerror(rc));
goto env_close;
}
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_drop(txn, dbi, delete);
if (rc) {
fprintf(stderr, "mdb_drop failed, error %d %s\n", rc, mdb_strerror(rc));
goto txn_abort;
}
rc = mdb_txn_commit(txn);
if (rc) {
fprintf(stderr, "mdb_txn_commit failed, error %d %s\n", rc, mdb_strerror(rc));
goto txn_abort;
}
txn = NULL;
txn_abort:
if (txn)
mdb_txn_abort(txn);
env_close:
mdb_env_close(env);
return rc ? EXIT_FAILURE : EXIT_SUCCESS;
}
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