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Re: $$ broken??

> If you have a ps(1) newer than 2006-10-02, then:

> pid=$(sh -c 'ps -o ppid= -p $$')

Actually that works fine even on my 1.4T machines (some six to seven
years before that date, IIRC).  It does require that $pid is used
without quotes, to make the whitespace go away, but that's how I was
using it anyway.

I'd also use ` ` rather than $( ), but that's mostly a personal
idiosyncracy, and it works either way, even with the 1.4T sh.

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