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/* Copyright 2000-2005 The Apache Software Foundation or its licensors, as
* applicable.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "apr_strings.h"
#if APR_HAVE_STDLIB_H
#include <stdlib.h> /* for free() */
#endif
#include "apu.h"
#if APU_HAVE_NDBM
#include "apr_dbm_private.h"
#include <ndbm.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
/* this is used in a few places to define a noop "function". it is needed
to stop "no effect" warnings from GCC. */
#define NOOP_FUNCTION if (0) ; else
#define APR_DBM_DBMODE_RO O_RDONLY
#define APR_DBM_DBMODE_RW O_RDWR
#define APR_DBM_DBMODE_RWCREATE (O_RDWR|O_CREAT)
#define APR_DBM_DBMODE_RWTRUNC (O_RDWR|O_CREAT|O_TRUNC)
/* map a NDBM error to an apr_status_t */
static apr_status_t ndbm2s(int ndbmerr)
{
if (ndbmerr == -1) {
/* ### need to fix this */
return APR_EGENERAL;
}
return APR_SUCCESS;
}
static apr_status_t set_error(apr_dbm_t *dbm, apr_status_t dbm_said)
{
apr_status_t rv = APR_SUCCESS;
/* ### ignore whatever the DBM said (dbm_said); ask it explicitly */
dbm->errmsg = NULL;
if (dbm_error((DBM*)dbm->file)) {
dbm->errmsg = NULL;
rv = APR_EGENERAL; /* ### need something better */
}
/* captured it. clear it now. */
dbm_clearerr((DBM*)dbm->file);
return rv;
}
/* --------------------------------------------------------------------------
**
** DEFINE THE VTABLE FUNCTIONS FOR NDBM
*/
static apr_status_t vt_ndbm_open(apr_dbm_t **pdb, const char *pathname,
apr_int32_t mode, apr_fileperms_t perm,
apr_pool_t *pool)
{
DBM *file;
int dbmode;
*pdb = NULL;
switch (mode) {
case APR_DBM_READONLY:
dbmode = APR_DBM_DBMODE_RO;
break;
case APR_DBM_READWRITE:
dbmode = APR_DBM_DBMODE_RW;
break;
case APR_DBM_RWCREATE:
dbmode = APR_DBM_DBMODE_RWCREATE;
break;
case APR_DBM_RWTRUNC:
dbmode = APR_DBM_DBMODE_RWTRUNC;
break;
default:
return APR_EINVAL;
}
{
file = dbm_open(pathname, dbmode, apr_posix_perms2mode(perm));
if (file == NULL)
return APR_EGENERAL; /* ### need a better error */
}
/* we have an open database... return it */
*pdb = apr_pcalloc(pool, sizeof(**pdb));
(*pdb)->pool = pool;
(*pdb)->type = &apr_dbm_type_ndbm;
(*pdb)->file = file;
/* ### register a cleanup to close the DBM? */
return APR_SUCCESS;
}
static void vt_ndbm_close(apr_dbm_t *dbm)
{
dbm_close(dbm->file);
}
static apr_status_t vt_ndbm_fetch(apr_dbm_t *dbm, apr_datum_t key,
apr_datum_t * pvalue)
{
datum *ckey;
datum rd;
ckey = (datum*)&key;
rd = dbm_fetch(dbm->file, *ckey);
*pvalue = *(apr_datum_t*)&rd;
/* store the error info into DBM, and return a status code. Also, note
that *pvalue should have been cleared on error. */
return set_error(dbm, APR_SUCCESS);
}
static apr_status_t vt_ndbm_store(apr_dbm_t *dbm, apr_datum_t key,
apr_datum_t value)
{
apr_status_t rv;
datum *ckey;
datum *cvalue;
ckey = (datum*)&key;
cvalue = (datum*)&value;
rv = ndbm2s( dbm_store( dbm->file, *ckey, *cvalue, DBM_REPLACE));
/* store any error info into DBM, and return a status code. */
return set_error(dbm, rv);
}
static apr_status_t vt_ndbm_del(apr_dbm_t *dbm, apr_datum_t key)
{
apr_status_t rv;
datum *ckey;
ckey = (datum*)&key;
rv = ndbm2s( dbm_delete(dbm->file, *ckey));
/* store any error info into DBM, and return a status code. */
return set_error(dbm, rv);
}
static int vt_ndbm_exists(apr_dbm_t *dbm, apr_datum_t key)
{
datum *ckey = (datum *)&key;
datum value;
value = dbm_fetch( dbm->file, *ckey);
return value.dptr != NULL;
}
static apr_status_t vt_ndbm_firstkey(apr_dbm_t *dbm, apr_datum_t * pkey)
{
datum rd;
rd = dbm_firstkey(dbm->file);
*pkey = *(apr_datum_t*)&rd;
/* store any error info into DBM, and return a status code. */
return set_error(dbm, APR_SUCCESS);
}
static apr_status_t vt_ndbm_nextkey(apr_dbm_t *dbm, apr_datum_t * pkey)
{
datum *ckey;
datum rd;
ckey = (datum*)pkey;
rd = dbm_nextkey(dbm->file);
*pkey = *(apr_datum_t*)&rd;
/* store any error info into DBM, and return a status code. */
return set_error(dbm, APR_SUCCESS);
}
static void vt_ndbm_freedatum(apr_dbm_t *dbm, apr_datum_t data)
{
/* nothing to do */
}
static void vt_ndbm_usednames(apr_pool_t *pool, const char *pathname,
const char **used1, const char **used2)
{
*used1 = apr_pstrdup(pool, pathname);
*used2 = NULL;
}
APU_DECLARE_DATA const apr_dbm_type_t apr_dbm_type_ndbm = {
"ndbm",
vt_ndbm_open,
vt_ndbm_close,
vt_ndbm_fetch,
vt_ndbm_store,
vt_ndbm_del,
vt_ndbm_exists,
vt_ndbm_firstkey,
vt_ndbm_nextkey,
vt_ndbm_freedatum,
vt_ndbm_usednames
};
#endif /* APU_HAVE_NDBM */
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