--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/nss/lib/dbm/src/db.c	Tue Aug 05 18:32:02 2014 +0200
@@ -0,0 +1,136 @@
+/*-
+ * Copyright (c) 1991, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * 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. ***REMOVED*** - see 
+ *    ftp://ftp.cs.berkeley.edu/pub/4bsd/README.Impt.License.Change
+ * 4. 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.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+static char sccsid[] = "@(#)db.c	8.4 (Berkeley) 2/21/94";
+#endif /* LIBC_SCCS and not lint */
+
+#ifndef __DBINTERFACE_PRIVATE
+#define __DBINTERFACE_PRIVATE
+#endif
+#ifdef macintosh
+#include <unix.h>
+#else
+#include <sys/types.h>
+#endif
+
+#include <errno.h>
+#include <fcntl.h>
+#include <stddef.h>
+#include <stdio.h>
+
+#include "mcom_db.h"
+
+/* a global flag that locks closed all databases */
+int all_databases_locked_closed = 0;
+
+/* set or unset a global lock flag to disable the
+ * opening of any DBM file
+ */
+void 
+dbSetOrClearDBLock(DBLockFlagEnum type)
+{
+	if(type == LockOutDatabase)
+		all_databases_locked_closed = 1;
+	else
+		all_databases_locked_closed = 0;
+}
+
+DB *
+dbopen(const char *fname, int flags,int mode, DBTYPE type, const void *openinfo)
+{
+
+	/* lock out all file databases.  Let in-memory databases through
+	 */
+	if(all_databases_locked_closed && fname)
+	  {
+		errno = EINVAL;
+		return(NULL);
+	  }
+
+#define	DB_FLAGS	(DB_LOCK | DB_SHMEM | DB_TXN)
+
+
+#if 0  /* most systems don't have EXLOCK and SHLOCK */
+#define	USE_OPEN_FLAGS							\
+	(O_CREAT | O_EXCL | O_EXLOCK | O_NONBLOCK | O_RDONLY |		\
+	 O_RDWR | O_SHLOCK | O_TRUNC)
+#else
+#define	USE_OPEN_FLAGS							\
+	(O_CREAT | O_EXCL  | O_RDONLY |		\
+	 O_RDWR | O_TRUNC)
+#endif
+
+	if ((flags & ~(USE_OPEN_FLAGS | DB_FLAGS)) == 0)
+		switch (type) {
+/* we don't need btree and recno right now */	
+#if 0
+		case DB_BTREE:
+			return (__bt_open(fname, flags & USE_OPEN_FLAGS,
+			    mode, openinfo, flags & DB_FLAGS));
+		case DB_RECNO:
+			return (__rec_open(fname, flags & USE_OPEN_FLAGS,
+			    mode, openinfo, flags & DB_FLAGS));
+#endif
+
+		case DB_HASH:
+			return (__hash_open(fname, flags & USE_OPEN_FLAGS,
+			    mode, (const HASHINFO *)openinfo, flags & DB_FLAGS));
+		default:
+			break;
+		}
+	errno = EINVAL;
+	return (NULL);
+}
+
+static int
+__dberr()
+{
+	return (RET_ERROR);
+}
+
+/*
+ * __DBPANIC -- Stop.
+ *
+ * Parameters:
+ *	dbp:	pointer to the DB structure.
+ */
+void
+__dbpanic(DB *dbp)
+{
+	/* The only thing that can succeed is a close. */
+	dbp->del = (int (*)(const struct __db *, const DBT *, uint))__dberr;
+	dbp->fd = (int (*)(const struct __db *))__dberr;
+	dbp->get = (int (*)(const struct __db *, const DBT *, DBT *, uint))__dberr;
+	dbp->put = (int (*)(const struct __db *, DBT *, const DBT *, uint))__dberr;
+	dbp->seq = (int (*)(const struct __db *, DBT *, DBT *, uint))__dberr;
+	dbp->sync = (int (*)(const struct __db *, uint))__dberr;
+}