CHMOD(1)                                                 CHMOD(1)

     NAME
          chmod - change file mode (permissions)

     SYNOPSIS
          chmod mode file ...

     DESCRIPTION
          Chmod changes the mode (permissions) of each file according
          to mode, which may be an octal number or a symbolic change
          to the existing mode.

          A mode can be numerically formed as the OR of the following
          octal values (a leading 8r is ignored):

          0400  read by owner
          0200  write by owner
          0100  execute (search in directory) by owner
          0070  read, write, execute (search) by group
          0007  read, write, execute (search) by others

          A symbolic mode has the form:

               [who] op permission

          The who part is a combination of the letters u (for user's
          permissions), g (group) and o (other).  The letter a stands
          for ugo.  If who is omitted, the default is a.

          The op field can be: + to add permission to the file's mode,
          - to take away permission, = to assign permission absolutely
          (all other bits being reset).

          The permission field is any combination of the letters r
          (read), w (write), x (execute), a (append only), l (exclu-
          sive access), and t (temporary, not archived).

     SOURCE
          /appl/cmd/chmod.b

     SEE ALSO
          chgrp(1), ls(1), sys-stat(2)

     BUGS
          The interpretation of the modes is limited on some host
          operating systems, particularly variants of Windows.