summaryrefslogtreecommitdiffstats
path: root/dbm/apr_dbm_ndbm.c
diff options
context:
space:
mode:
Diffstat (limited to '')
-rw-r--r--dbm/apr_dbm_ndbm.c238
1 files changed, 238 insertions, 0 deletions
diff --git a/dbm/apr_dbm_ndbm.c b/dbm/apr_dbm_ndbm.c
new file mode 100644
index 0000000..7f38186
--- /dev/null
+++ b/dbm/apr_dbm_ndbm.c
@@ -0,0 +1,238 @@
+/* Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You 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_config.h"
+#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>
+
+#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 kd, rd;
+
+ kd.dptr = key.dptr;
+ kd.dsize = key.dsize;
+
+ rd = dbm_fetch(dbm->file, kd);
+
+ pvalue->dptr = rd.dptr;
+ pvalue->dsize = rd.dsize;
+
+ /* 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)
+{
+ int rc;
+ datum kd, vd;
+
+ kd.dptr = key.dptr;
+ kd.dsize = key.dsize;
+
+ vd.dptr = value.dptr;
+ vd.dsize = value.dsize;
+
+ rc = dbm_store(dbm->file, kd, vd, DBM_REPLACE);
+
+ /* store any error info into DBM, and return a status code. */
+ return set_error(dbm, ndbm2s(rc));
+}
+
+static apr_status_t vt_ndbm_del(apr_dbm_t *dbm, apr_datum_t key)
+{
+ int rc;
+ datum kd;
+
+ kd.dptr = key.dptr;
+ kd.dsize = key.dsize;
+
+ rc = dbm_delete(dbm->file, kd);
+
+ /* store any error info into DBM, and return a status code. */
+ return set_error(dbm, ndbm2s(rc));
+}
+
+static int vt_ndbm_exists(apr_dbm_t *dbm, apr_datum_t key)
+{
+ datum kd, rd;
+
+ kd.dptr = key.dptr;
+ kd.dsize = key.dsize;
+
+ rd = dbm_fetch(dbm->file, kd);
+
+ return rd.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->dptr = rd.dptr;
+ pkey->dsize = rd.dsize;
+
+ /* 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 kd, rd;
+
+ kd.dptr = pkey->dptr;
+ kd.dsize = pkey->dsize;
+
+ rd = dbm_nextkey(dbm->file);
+
+ pkey->dptr = rd.dptr;
+ pkey->dsize = rd.dsize;
+
+ /* 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_MODULE_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 */