Time in prompt?

[The Rastafari Yakker]

There are a number of ways to put the time into the prompt, but it
may not be the best thing to do.  Here's a little command I tried
and got to work, but there's a problem with it:

          set prompt = "(`date '+%H:%M:%S'`):  "

This works, but the time isn't updated.  The C shell has to be reset
in order to update the time.  If you wanted to constantly update the
time, you would have to run a constant (C) shell in the background that
runs a command and then updates the prompt time.

 
      set prompt = "(`date '+%H:%M:%S'`):  "
      alias cd 'chdir \!*; set prompt = "(`date '+%H:%M:%S'`):  "'

Other than this, I don't know of another way to correctly change the
time without creating another shell in the background and making it 
more of a bother than checking your watch.

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