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umask

Sets a UNIX style file creation mask.

Compatibility:

This function is compatible with the following targets:

ANSI
BeOS
EMB/RTOS

Mac OS

Palm OS

Win32


Prototype:
#include <fcntl.h> /* Macintosh */
#include <io.h> /* Windows */
mode_t umask(mode_t cmask);
Parameters:

Parameters for this facility are:

cmask  
mode_t  
permission bitmask  

Remarks:

The function umask is used for calls to open(), creat() and mkdir() to turn off permission bits in the mode argument.


NOTE

The permission bits are not used on either the Mac nor Windows. The function is provided merely to allow compilation and compatibility.
Return:

The previous mask. Zero is returned for Mac and Windows operating systems.

See Also:

"creat"

"open"

"mkdir"


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Last updated: August 16, 2000