Import BSDDB 4.7.25 (as of svn r89086)

common/openflags.c

@@ -0,0 +1,51 @@
+/*-
+ * See the file LICENSE for redistribution information.
+ *
+ * Copyright (c) 1997,2008 Oracle.  All rights reserved.
+ *
+ * $Id: openflags.c 63573 2008-05-23 21:43:21Z trent.nelson $
+ */
+
+#include "db_config.h"
+
+#include "db_int.h"
+
+/*
+ * __db_openflags --
+ *	Convert open(2) flags to DB flags.
+ *
+ * PUBLIC: u_int32_t __db_openflags __P((int));
+ */
+u_int32_t
+__db_openflags(oflags)
+	int oflags;
+{
+	u_int32_t dbflags;
+
+	dbflags = 0;
+
+	if (oflags & O_CREAT)
+		dbflags |= DB_CREATE;
+
+	if (oflags & O_TRUNC)
+		dbflags |= DB_TRUNCATE;
+
+	/*
+	 * !!!
+	 * Convert POSIX 1003.1 open(2) mode flags to DB flags.  This isn't
+	 * an exact science as few POSIX implementations have a flag value
+	 * for O_RDONLY, it's simply the lack of a write flag.
+	 */
+#ifndef	O_ACCMODE
+#define	O_ACCMODE	(O_RDONLY | O_RDWR | O_WRONLY)
+#endif
+	switch (oflags & O_ACCMODE) {
+	case O_RDWR:
+	case O_WRONLY:
+		break;
+	default:
+		dbflags |= DB_RDONLY;
+		break;
+	}
+	return (dbflags);
+}