4.3BSD - /usr/man/cat2/umask.0

UMASK(2)                                                              UMASK(2)


NAME
       umask - set file creation mode mask

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

DESCRIPTION
       Umask  sets the process’s file mode creation mask to numask and returns
       the previous value of the mask.  The low-order 9  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 022 (write access for owner only).  The mask is
       inherited by child processes.

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

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


4th Berkeley Distribution         May 9, 1985                         UMASK(2)