umask(1)                   (Essential Utilities)                   umask(1)


   NAME
         umask - set file-creation mode mask

   SYNOPSIS
         umask [ ooo ]

   DESCRIPTION
         The user file-creation mode mask is set to ooo.  The three octal
         digits refer to read/write/execute permissions for owner, group, and
         others, respectively (see chmod(2) and umask(2)).  The value of each
         specified digit is subtracted from the corresponding ``digit''
         specified by the system for the creation of a file (see creat(2)).
         For example, umask 022 removes group and others write permission
         (files normally created with mode 777 become mode 755; files created
         with mode 666 become mode 644).

         If ooo is omitted, the current value of the mask is printed.

         umask is recognized and executed by the shell.

         umask can be included in the user's .profile (see profile(4)) and
         invoked at login to automatically set the user's permissions on files
         or directories created.

   SEE ALSO
         chmod(1), sh(1).
         chmod(2), creat(2), umask(2), profile(4) in the Programmer's
         Reference Manual.

























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