Important Notice

The pages on this site contain documentation for very old MS-DOS software, purely for historical purposes. If you're looking for up-to-date documentation, particularly for programming, you should not rely on the information found here, as it will be woefully out of date.

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  Include:   <io.h>, <sys\types.h>, <sys\stat.h>
 
  Syntax:    int umask( int pmode );
             pmode: S_IWRITE, S_IREAD, S_IWRITE | S_IREAD
 
  Returns:   the previous value of <pmode>.
 
  See also:  chmod, creat, mkdir, open
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