Waiting for a process to die

[Kelly Jones]

How do I wait for a specific process to die? I want to do something like:

waitpid 1234&&(echo "done!" | Mail -s "PROC DONE" kelly.terry.jones at gmail.com)

I'm sure this is trivial, but I can't find a way to do it.

I wrote a Perl script that checks every second if /proc/pid exists,
but that only works if /proc is mounted + I'm now on VMs which can't
easily mount /proc

-- 
We're just a Bunch Of Regular Guys, a collective group that's trying
to understand and assimilate technology. We feel that resistance to
new ideas and technology is unwise and ultimately futile.