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authorJesse Morgan <jesse@jesterpm.net>2016-12-17 21:28:53 -0800
committerJesse Morgan <jesse@jesterpm.net>2016-12-17 21:28:53 -0800
commit54df2afaa61c6a03cbb4a33c9b90fa572b6d07b8 (patch)
tree18147b92b969d25ffbe61935fb63035cac820dd0 /db-4.8.30/dbm/dbm.c
Berkeley DB 4.8 with rust build script for linux.
Diffstat (limited to 'db-4.8.30/dbm/dbm.c')
-rw-r--r--db-4.8.30/dbm/dbm.c499
1 files changed, 499 insertions, 0 deletions
diff --git a/db-4.8.30/dbm/dbm.c b/db-4.8.30/dbm/dbm.c
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+/*-
+ * See the file LICENSE for redistribution information.
+ *
+ * Copyright (c) 1996-2009 Oracle. 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.
+ *
+ * $Id$
+ */
+
+#define DB_DBM_HSEARCH 1
+#include "db_config.h"
+
+#include "db_int.h"
+
+/*
+ *
+ * This package provides dbm and ndbm compatible interfaces to DB.
+ *
+ * EXTERN: #if DB_DBM_HSEARCH != 0
+ *
+ * EXTERN: int __db_ndbm_clearerr __P((DBM *));
+ * EXTERN: void __db_ndbm_close __P((DBM *));
+ * EXTERN: int __db_ndbm_delete __P((DBM *, datum));
+ * EXTERN: int __db_ndbm_dirfno __P((DBM *));
+ * EXTERN: int __db_ndbm_error __P((DBM *));
+ * EXTERN: datum __db_ndbm_fetch __P((DBM *, datum));
+ * EXTERN: datum __db_ndbm_firstkey __P((DBM *));
+ * EXTERN: datum __db_ndbm_nextkey __P((DBM *));
+ * EXTERN: DBM *__db_ndbm_open __P((const char *, int, int));
+ * EXTERN: int __db_ndbm_pagfno __P((DBM *));
+ * EXTERN: int __db_ndbm_rdonly __P((DBM *));
+ * EXTERN: int __db_ndbm_store __P((DBM *, datum, datum, int));
+ *
+ * EXTERN: int __db_dbm_close __P((void));
+ * EXTERN: int __db_dbm_delete __P((datum));
+ * EXTERN: datum __db_dbm_fetch __P((datum));
+ * EXTERN: datum __db_dbm_firstkey __P((void));
+ * EXTERN: int __db_dbm_init __P((char *));
+ * EXTERN: datum __db_dbm_nextkey __P((datum));
+ * EXTERN: int __db_dbm_store __P((datum, datum));
+ *
+ * EXTERN: #endif
+ */
+
+/*
+ * 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)
+ dbm_close(__cur_db);
+ if ((__cur_db = dbm_open(file, O_CREAT | O_RDWR, DB_MODE_600)) != 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 = NULL;
+ item.dsize = 0;
+ return (item);
+ }
+ return (dbm_fetch(__cur_db, key));
+}
+
+datum
+__db_dbm_firstkey()
+{
+ datum item;
+
+ if (__cur_db == NULL) {
+ __db_no_open();
+ item.dptr = NULL;
+ item.dsize = 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 = NULL;
+ item.dsize = 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[DB_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, NULL,
+ path, NULL, DB_HASH, __db_openflags(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;
+
+ DB_INIT_DBT(_key, key.dptr, key.dsize);
+ memset(&_data, 0, sizeof(DBT));
+
+ /*
+ * Note that we can't simply use the dbc we have to do a 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 = (int)_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_AM_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->get(dbc, &_key, &_data, DB_FIRST)) == 0) {
+ key.dptr = _key.data;
+ key.dsize = (int)_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_AM_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->get(dbc, &_key, &_data, DB_NEXT)) == 0) {
+ key.dptr = _key.data;
+ key.dsize = (int)_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_AM_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;
+
+ DB_INIT_DBT(_key, key.dptr, 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_AM_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;
+
+ DB_INIT_DBT(_key, key.dptr, key.dsize);
+ DB_INIT_DBT(_data, data.dptr, 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_AM_DBM_ERROR);
+ return (-1);
+}
+
+int
+__db_ndbm_error(dbm)
+ DBM *dbm;
+{
+ DBC *dbc;
+
+ dbc = (DBC *)dbm;
+
+ return (F_ISSET(dbc->dbp, DB_AM_DBM_ERROR));
+}
+
+int
+__db_ndbm_clearerr(dbm)
+ DBM *dbm;
+{
+ DBC *dbc;
+
+ dbc = (DBC *)dbm;
+
+ F_CLR(dbc->dbp, DB_AM_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);
+}