UMASK(2)                             BSD                              UMASK(2)



NAME
     umask - set file creation mode mask

SYNOPSIS
     oumask = umask(numask)
     int oumask, numask;

DESCRIPTION
     umask sets the process' file mode creation mask to numask and returns the
     previous value of the mask.  The low-order nine bits of numask are used
     whenever a file is created, clearing corresponding bits in the file mode
     (see chmod(2)).  This clearing allows each user to restrict the default
     access to his files.

     The value is initially 000 (write access for everyone).  The mask is
     inherited by child processes.

SEE ALSO
     chmod(2), mknod(2), open(2)

DIAGNOSTICS
     The previous value of the file mode mask is returned by the call.

NOTES
     On some systems, the value is initially 022 (write access for owner
     only).