Re: [HACKERS] postmaster.pid

> Hi,
> 
> I have committed changes to postmaster.c. Now it creates a file called
> "postmaster.pid" under $PGDATA, which holds postmaster's process
> id. If the file has already existed, postmaster won't start. So we
> cannot start more than on postmaster with same $PGDATA any more. I
> believe it's a good thing. The file will be deleted upon postmaster
> shutting down.

I assume you do a kill(0) on the pid if the file exists on startup to
check to see if the pid is still valid?

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