1 files changed, 55 insertions, 0 deletions
diff --git a/private/crt32/misc/umask.c b/private/crt32/misc/umask.c
new file mode 100644
index 000000000..9ca63a876
--- /dev/null
+++ b/private/crt32/misc/umask.c
@@ -0,0 +1,55 @@
+/***
+*umask.c - set file permission mask
+*
+*	Copyright (c) 1989-1991, Microsoft Corporation. All rights reserved.
+*
+*Purpose:
+*	defines _umask() - sets file permission mask of current process*
+*	affecting files created by creat, open, or sopen.
+*
+*Revision History:
+*	06-02-89   PHG	module created
+*	03-16-90   GJF	Made calling type _CALLTYPE1, added #include
+*			<cruntime.h> and fixed the copyright. Also, cleaned
+*			up the formatting a bit.
+*	04-05-90   GJF	Added #include <io.h>.
+*	10-04-90   GJF	New-style function declarator.
+*	01-17-91   GJF	ANSI naming.
+*
+*******************************************************************************/
+
+#include <cruntime.h>
+#include <internal.h>
+#include <io.h>
+
+/***
+*int _umask(mode) - set the file mode mask
+*
+*Purpose:
+*	Sets the file-permission mask of the current process* which
+*	modifies the permission setting of new files created by creat,
+*	open, or sopen.
+*
+*Entry:
+*	int mode - new file permission mask
+*		   may contain S_IWRITE, S_IREAD, S_IWRITE | S_IREAD.
+*		   The S_IREAD bit has no effect under OS/2.
+*
+*Exit:
+*	returns the previous setting of the file permission mask.
+*
+*Exceptions:
+*
+*******************************************************************************/
+
+int _CALLTYPE1 _umask (
+	int mode
+	)
+{
+	register int oldmode;		/* old umask value */
+
+	mode &= 0x180;			/* only user read/write permitted */
+	oldmode = _umaskval;		/* remember old value */
+	_umaskval = mode;		/* set new value */
+	return oldmode; 		/* return old value */
+}