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     UMASK(2)                                                 UMASK(2)

     NAME
          umask - set file creation mode mask

     SYNOPSIS
          umask(complmode)

     DESCRIPTION
          Umask sets a mask used whenever a file is created by
          creat(2) or mknod(2): the actual mode (see chmod(2)) of the
          newly-created file is the logical and of the given mode and
          the complement of the argument.  Only the low-order 9 bits
          of the mask (the protection bits) participate.  In other
          words, the mask shows the bits to be turned off when files
          are created.

          The previous value of the mask is returned by the call.  The
          value is initially 022 (write access for owner only).  The
          mask is inherited by child processes.

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