Manual page for UMASK(2)
umask - set file creation mode mask
SYNOPSIS
#include <sys/types.h>
#include <sys/stat.h>
mode_t umask(mode_t cmask);
DESCRIPTION
The
umask
sets file mode creation mask of the calling process to cmask
and returns the previous value of the mask.
The low-order nine bits of cmask
are used whenever a file is created,
clearing corresponding bits in the file mode
(see
chmod.2
This clearing allows a user to restrict the default access
to his/her files.
The value is initially 022 (write access for owner only).
The mask is inherited by child processes.
The BSD declaratation of
umask
accepts and returns type
int,
not
mode_t.
RETURN VALUE
The previous value of the file mode creation mask is returned by the call.
ERRORS
The
umask
function is always successful--no return value indicates an error.
SEE ALSO
chmod(2),
creat(2),
mkdir(2),
mkfifo(2P),
Created by unroff & hp-tools.
© somebody (See intro for details). All Rights Reserved.
Last modified 11/5/97
