CHMOD(1)                                                 CHMOD(1)

     NAME
          chmod - change mode

     SYNOPSIS
          chmod mode file ...

     DESCRIPTION
          The mode of each named file is changed according to mode,
          which may be an octal number or a symbolic change to the
          existing mode.  A mode is an octal number constructed from
          the OR of the following modes.

          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.

          Op can be + to add permission to the file's mode, - to take
          away permission, and = to assign permission absolutely (all
          other bits will be reset).

          Permission is any combination of the letters r (read), w
          (write), x (execute), a (append only), l (exclusive access),
          and t (temporary file).

          Only the owner of a file or the group leader of its group
          may change the file's mode.

     SOURCE
          /sys/src/cmd/chmod.c

     SEE ALSO
          ls(1), stat(2), stat(5)