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/***
*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 */
}
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