chmod [-fileid] mode filelist
          Set permissions of each of the files in the list filel-
          ist  to mode, where mode is an absolute numeric mode or
          symbolic permissions as in the UNIX  chmod(1)  command.
          To  specify a mode as octal, it should be prefixed with
          a "0" (e.g. 0622).

          If the option -fileid is specified, filelist is a  list
          of  open  file  identifiers  rather than a list of file
          names.  This option is not available on all  Unix  sys-
          tems.   Use  the infox have_fchmod command to determine
          if this functionality is available.

          The chmod command is not available on Windows 95/NT.

          This command is provided by Extended Tcl.