| /* Copyright 2000-2004 The Apache Software Foundation |
| * |
| * 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 */ |