umask(1)              UNIX System V(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) in the Programmer's Reference Manual.
      profile(4) in the System Administrator's Reference Manual.



























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