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