umask(1)                                                 umask(1)



     NAME
          umask - set file-creation mode mask

     SYNOPSIS
          umask [setting]

     DESCRIPTION
          The user file-creation mode mask is set to setting, where
          setting is a 3-digit octal number.  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 setting is omitted, the current value of the mask is
          printed.

          umask is recognized and executed by the shell.

     EXAMPLE
               umask 22

          sets file-creation mode mask such that at file creation, the
          write bits will be zeroed out for group and other users,
          regardless of mode specification in creat(2).

     SEE ALSO
          chmod(1), csh(1), ksh(1), sh(1), chmod(2), creat(2),
          umask(2).






















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