@verb #3797:"timeout" this none this rxdo #833
@program #3797:"timeout" this none this
$perm_utils:can_hack() || raise(E_PERM)
t = time()
for chan in (this:ls_chan())
  {members, history, atime, @options} = this:get_chan(chan)
  if (atime + this.timeout < t)
    this:chan_part(chan, @members)
  endif
endfor
.