umask(1)                 USER COMMANDS                   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  nor-
     mally  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  pro-
     file(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) in the  Programmer's  Reference
     Manual.
     profile(4) in the System Administrator's Reference Manual.

























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