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UMASK(2)                      System Calls Manual                     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)  partici-
       pate.   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  0  (no  restrictions).   The mask is inherited by child pro-
       cesses.

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

ASSEMBLER
       (umask = 60.)
       sys umask; complmode



                                                                      UMASK(2)