Import changeset

1 files changed, 489 insertions, 0 deletions

diff --git a/bdb/dbm/dbm.c b/bdb/dbm/dbm.c
new file mode 100644
index 00000000000..e5f423572c5
--- /dev/null
+++ b/bdb/dbm/dbm.c
@@ -0,0 +1,489 @@
+/*-
+ * See the file LICENSE for redistribution information.
+ *
+ * Copyright (c) 1996, 1997, 1998, 1999, 2000
+ *	Sleepycat Software.  All rights reserved.
+ */
+/*
+ * Copyright (c) 1990, 1993
+ *	Margo Seltzer.  All rights reserved.
+ */
+/*
+ * Copyright (c) 1990, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * Margo Seltzer.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include "db_config.h"
+
+#ifndef lint
+static const char revid[] = "$Id: dbm.c,v 11.7 2000/11/30 00:58:35 ubell Exp $";
+#endif /* not lint */
+
+#ifndef NO_SYSTEM_INCLUDES
+#include <sys/types.h>
+
+#include <fcntl.h>
+#include <string.h>
+#endif
+
+#define	DB_DBM_HSEARCH	1
+#include "db_int.h"
+
+/*
+ *
+ * This package provides dbm and ndbm compatible interfaces to DB.
+ *
+ * The DBM routines, which call the NDBM routines.
+ */
+static DBM *__cur_db;
+
+static void __db_no_open __P((void));
+
+int
+__db_dbm_init(file)
+	char *file;
+{
+	if (__cur_db != NULL)
+		(void)dbm_close(__cur_db);
+	if ((__cur_db =
+	    dbm_open(file, O_CREAT | O_RDWR, __db_omode("rw----"))) != NULL)
+		return (0);
+	if ((__cur_db = dbm_open(file, O_RDONLY, 0)) != NULL)
+		return (0);
+	return (-1);
+}
+
+int
+__db_dbm_close()
+{
+	if (__cur_db != NULL) {
+		dbm_close(__cur_db);
+		__cur_db = NULL;
+	}
+	return (0);
+}
+
+datum
+__db_dbm_fetch(key)
+	datum key;
+{
+	datum item;
+
+	if (__cur_db == NULL) {
+		__db_no_open();
+		item.dptr = 0;
+		return (item);
+	}
+	return (dbm_fetch(__cur_db, key));
+}
+
+datum
+__db_dbm_firstkey()
+{
+	datum item;
+
+	if (__cur_db == NULL) {
+		__db_no_open();
+		item.dptr = 0;
+		return (item);
+	}
+	return (dbm_firstkey(__cur_db));
+}
+
+datum
+__db_dbm_nextkey(key)
+	datum key;
+{
+	datum item;
+
+	COMPQUIET(key.dsize, 0);
+
+	if (__cur_db == NULL) {
+		__db_no_open();
+		item.dptr = 0;
+		return (item);
+	}
+	return (dbm_nextkey(__cur_db));
+}
+
+int
+__db_dbm_delete(key)
+	datum key;
+{
+	if (__cur_db == NULL) {
+		__db_no_open();
+		return (-1);
+	}
+	return (dbm_delete(__cur_db, key));
+}
+
+int
+__db_dbm_store(key, dat)
+	datum key, dat;
+{
+	if (__cur_db == NULL) {
+		__db_no_open();
+		return (-1);
+	}
+	return (dbm_store(__cur_db, key, dat, DBM_REPLACE));
+}
+
+static void
+__db_no_open()
+{
+	(void)fprintf(stderr, "dbm: no open database.\n");
+}
+
+/*
+ * This package provides dbm and ndbm compatible interfaces to DB.
+ *
+ * The NDBM routines, which call the DB routines.
+ */
+/*
+ * Returns:
+ *	*DBM on success
+ *	 NULL on failure
+ */
+DBM *
+__db_ndbm_open(file, oflags, mode)
+	const char *file;
+	int oflags, mode;
+{
+	DB *dbp;
+	DBC *dbc;
+	int ret;
+	char path[MAXPATHLEN];
+
+	/*
+	 * !!!
+	 * Don't use sprintf(3)/snprintf(3) -- the former is dangerous, and
+	 * the latter isn't standard, and we're manipulating strings handed
+	 * us by the application.
+	 */
+	if (strlen(file) + strlen(DBM_SUFFIX) + 1 > sizeof(path)) {
+		__os_set_errno(ENAMETOOLONG);
+		return (NULL);
+	}
+	(void)strcpy(path, file);
+	(void)strcat(path, DBM_SUFFIX);
+	if ((ret = db_create(&dbp, NULL, 0)) != 0) {
+		__os_set_errno(ret);
+		return (NULL);
+	}
+
+	/*
+	 * !!!
+	 * The historic ndbm library corrected for opening O_WRONLY.
+	 */
+	if (oflags & O_WRONLY) {
+		oflags &= ~O_WRONLY;
+		oflags |= O_RDWR;
+	}
+
+	if ((ret = dbp->set_pagesize(dbp, 4096)) != 0 ||
+	    (ret = dbp->set_h_ffactor(dbp, 40)) != 0 ||
+	    (ret = dbp->set_h_nelem(dbp, 1)) != 0 ||
+	    (ret = dbp->open(dbp,
+	    path, NULL, DB_HASH, __db_oflags(oflags), mode)) != 0) {
+		__os_set_errno(ret);
+		return (NULL);
+	}
+
+	if ((ret = dbp->cursor(dbp, NULL, &dbc, 0)) != 0) {
+		(void)dbp->close(dbp, 0);
+		__os_set_errno(ret);
+		return (NULL);
+	}
+
+	return ((DBM *)dbc);
+}
+
+/*
+ * Returns:
+ *	Nothing.
+ */
+void
+__db_ndbm_close(dbm)
+	DBM *dbm;
+{
+	DBC *dbc;
+
+	dbc = (DBC *)dbm;
+
+	(void)dbc->dbp->close(dbc->dbp, 0);
+}
+
+/*
+ * Returns:
+ *	DATUM on success
+ *	NULL on failure
+ */
+datum
+__db_ndbm_fetch(dbm, key)
+	DBM *dbm;
+	datum key;
+{
+	DBC *dbc;
+	DBT _key, _data;
+	datum data;
+	int ret;
+
+	dbc = (DBC *)dbm;
+
+	memset(&_key, 0, sizeof(DBT));
+	memset(&_data, 0, sizeof(DBT));
+	_key.size = key.dsize;
+	_key.data = key.dptr;
+
+	/*
+	 * Note that we can't simply use the dbc we have to do a c_get/SET,
+	 * because that cursor is the one used for sequential iteration and
+	 * it has to remain stable in the face of intervening gets and puts.
+	 */
+	if ((ret = dbc->dbp->get(dbc->dbp, NULL, &_key, &_data, 0)) == 0) {
+		data.dptr = _data.data;
+		data.dsize = _data.size;
+	} else {
+		data.dptr = NULL;
+		data.dsize = 0;
+		if (ret == DB_NOTFOUND)
+			__os_set_errno(ENOENT);
+		else {
+			__os_set_errno(ret);
+			F_SET(dbc->dbp, DB_DBM_ERROR);
+		}
+	}
+	return (data);
+}
+
+/*
+ * Returns:
+ *	DATUM on success
+ *	NULL on failure
+ */
+datum
+__db_ndbm_firstkey(dbm)
+	DBM *dbm;
+{
+	DBC *dbc;
+	DBT _key, _data;
+	datum key;
+	int ret;
+
+	dbc = (DBC *)dbm;
+
+	memset(&_key, 0, sizeof(DBT));
+	memset(&_data, 0, sizeof(DBT));
+
+	if ((ret = dbc->c_get(dbc, &_key, &_data, DB_FIRST)) == 0) {
+		key.dptr = _key.data;
+		key.dsize = _key.size;
+	} else {
+		key.dptr = NULL;
+		key.dsize = 0;
+		if (ret == DB_NOTFOUND)
+			__os_set_errno(ENOENT);
+		else {
+			__os_set_errno(ret);
+			F_SET(dbc->dbp, DB_DBM_ERROR);
+		}
+	}
+	return (key);
+}
+
+/*
+ * Returns:
+ *	DATUM on success
+ *	NULL on failure
+ */
+datum
+__db_ndbm_nextkey(dbm)
+	DBM *dbm;
+{
+	DBC *dbc;
+	DBT _key, _data;
+	datum key;
+	int ret;
+
+	dbc = (DBC *)dbm;
+
+	memset(&_key, 0, sizeof(DBT));
+	memset(&_data, 0, sizeof(DBT));
+
+	if ((ret = dbc->c_get(dbc, &_key, &_data, DB_NEXT)) == 0) {
+		key.dptr = _key.data;
+		key.dsize = _key.size;
+	} else {
+		key.dptr = NULL;
+		key.dsize = 0;
+		if (ret == DB_NOTFOUND)
+			__os_set_errno(ENOENT);
+		else {
+			__os_set_errno(ret);
+			F_SET(dbc->dbp, DB_DBM_ERROR);
+		}
+	}
+	return (key);
+}
+
+/*
+ * Returns:
+ *	 0 on success
+ *	<0 failure
+ */
+int
+__db_ndbm_delete(dbm, key)
+	DBM *dbm;
+	datum key;
+{
+	DBC *dbc;
+	DBT _key;
+	int ret;
+
+	dbc = (DBC *)dbm;
+
+	memset(&_key, 0, sizeof(DBT));
+	_key.data = key.dptr;
+	_key.size = key.dsize;
+
+	if ((ret = dbc->dbp->del(dbc->dbp, NULL, &_key, 0)) == 0)
+		return (0);
+
+	if (ret == DB_NOTFOUND)
+		__os_set_errno(ENOENT);
+	else {
+		__os_set_errno(ret);
+		F_SET(dbc->dbp, DB_DBM_ERROR);
+	}
+	return (-1);
+}
+
+/*
+ * Returns:
+ *	 0 on success
+ *	<0 failure
+ *	 1 if DBM_INSERT and entry exists
+ */
+int
+__db_ndbm_store(dbm, key, data, flags)
+	DBM *dbm;
+	datum key, data;
+	int flags;
+{
+	DBC *dbc;
+	DBT _key, _data;
+	int ret;
+
+	dbc = (DBC *)dbm;
+
+	memset(&_key, 0, sizeof(DBT));
+	_key.data = key.dptr;
+	_key.size = key.dsize;
+
+	memset(&_data, 0, sizeof(DBT));
+	_data.data = data.dptr;
+	_data.size = data.dsize;
+
+	if ((ret = dbc->dbp->put(dbc->dbp, NULL,
+	    &_key, &_data, flags == DBM_INSERT ? DB_NOOVERWRITE : 0)) == 0)
+		return (0);
+
+	if (ret == DB_KEYEXIST)
+		return (1);
+
+	__os_set_errno(ret);
+	F_SET(dbc->dbp, DB_DBM_ERROR);
+	return (-1);
+}
+
+int
+__db_ndbm_error(dbm)
+	DBM *dbm;
+{
+	DBC *dbc;
+
+	dbc = (DBC *)dbm;
+
+	return (F_ISSET(dbc->dbp, DB_DBM_ERROR));
+}
+
+int
+__db_ndbm_clearerr(dbm)
+	DBM *dbm;
+{
+	DBC *dbc;
+
+	dbc = (DBC *)dbm;
+
+	F_CLR(dbc->dbp, DB_DBM_ERROR);
+	return (0);
+}
+
+/*
+ * Returns:
+ *	1 if read-only
+ *	0 if not read-only
+ */
+int
+__db_ndbm_rdonly(dbm)
+	DBM *dbm;
+{
+	DBC *dbc;
+
+	dbc = (DBC *)dbm;
+
+	return (F_ISSET(dbc->dbp, DB_AM_RDONLY) ? 1 : 0);
+}
+
+/*
+ * XXX
+ * We only have a single file descriptor that we can return, not two.  Return
+ * the same one for both files.  Hopefully, the user is using it for locking
+ * and picked one to use at random.
+ */
+int
+__db_ndbm_dirfno(dbm)
+	DBM *dbm;
+{
+	return (dbm_pagfno(dbm));
+}
+
+int
+__db_ndbm_pagfno(dbm)
+	DBM *dbm;
+{
+	DBC *dbc;
+	int fd;
+
+	dbc = (DBC *)dbm;
+
+	(void)dbc->dbp->fd(dbc->dbp, &fd);
+	return (fd);
+}