Commit 55fcd0cf authored by Howard Chu's avatar Howard Chu
Browse files

Add mdb_drop tool

parent 4d5e2d2a
......@@ -39,8 +39,8 @@ mandir = $(datarootdir)/man
IHDRS = lmdb.h
ILIBS = liblmdb.a liblmdb$(SOEXT)
IPROGS = mdb_stat mdb_copy mdb_dump mdb_load
IDOCS = mdb_stat.1 mdb_copy.1 mdb_dump.1 mdb_load.1
IPROGS = mdb_stat mdb_copy mdb_dump mdb_load mdb_drop
IDOCS = mdb_stat.1 mdb_copy.1 mdb_dump.1 mdb_load.1 mdb_drop.1
PROGS = $(IPROGS) mtest mtest2 mtest3 mtest4 mtest5
all: $(ILIBS) $(PROGS)
......@@ -72,6 +72,7 @@ mdb_stat: mdb_stat.o liblmdb.a
mdb_copy: mdb_copy.o liblmdb.a
mdb_dump: mdb_dump.o liblmdb.a
mdb_load: mdb_load.o liblmdb.a
mdb_drop: mdb_drop.o liblmdb.a
mtest: mtest.o liblmdb.a
mtest2: mtest2.o liblmdb.a
mtest3: mtest3.o liblmdb.a
......
.TH MDB_DROP 1 "2017/11/19" "LMDB 0.9.70"
.\" Copyright 2014-2017 Howard Chu, Symas Corp. All Rights Reserved.
.\" Copying restrictions apply. See COPYRIGHT/LICENSE.
.SH NAME
mdb_drop \- LMDB database delete tool
.SH SYNOPSIS
.B mdb_drop
[\c
.BR \-V ]
[\c
.BR \-n ]
[\c
.BR \-d ]
[\c
.BI \-s \ subdb\fR]
.BR \ envpath
.SH DESCRIPTION
The
.B mdb_drop
utility empties or deletes a database in the specified
environment.
.SH OPTIONS
.TP
.BR \-V
Write the library version number to the standard output, and exit.
.TP
.BR \-n
Operate on an LMDB database which does not use subdirectories.
.TP
.BR \-d
Delete the specified database, don't just empty it.
.TP
.BR \-s \ subdb
Operate on a specific subdatabase. If no database is specified, only the main database is dropped.
.SH DIAGNOSTICS
Exit status is zero if no errors occur.
Errors result in a non-zero exit status and
a diagnostic message being written to standard error.
.SH AUTHOR
Howard Chu of Symas Corporation <http://www.symas.com>
/* 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;
}
......@@ -4,6 +4,11 @@
<title>mdb_copy - environment copy tool</title>
<filename>mdb_copy.1</filename>
</compound>
<compound kind="page">
<name>mdb_drop_1</name>
<title>mdb_drop - database delete tool</title>
<filename>mdb_drop.1</filename>
</compound>
<compound kind="page">
<name>mdb_dump_1</name>
<title>mdb_dump - environment export tool</title>
......
Markdown is supported
0% or .
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment