1UMASK(2)                      System Calls Manual                     UMASK(2)
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NAME

6       umask - set file creation mode mask
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SYNOPSIS

9       umask(complmode)
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DESCRIPTION

12       Umask  sets  a  mask  used  whenever  a  file is created by creat(2) or
13       mknod(2): the actual mode (see chmod(2)) of the newly-created  file  is
14       the  logical  and of the given mode and the complement of the argument.
15       Only the low-order 9 bits of the mask (the  protection  bits)  partici‐
16       pate.   In  other  words, the mask shows the bits to be turned off when
17       files are created.
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19       The previous value of the mask is returned by the call.  The  value  is
20       initially  0  (no  restrictions).   The mask is inherited by child pro‐
21       cesses.
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SEE ALSO

24       creat(2), mknod(2), chmod(2)
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ASSEMBLER

27       (umask = 60.)
28       sys umask; complmode
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