Re: Win32 question: getppid() with no parent?

[Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>]

"Magnus Hagander" <mha(at)sollentuna(dot)net> writes:
>> But you'd do that only once during postmaster start, right?  It's
>> probably marginally faster/safer to do that than to fabricate a new
>> handle in each child based on PostmasterPid.

> Yup, then you could just write the HANDLE vlaue (basically a 32-bit
> integer) to the backend startup file

Great.  Could I get someone to implement this now?  The function that
needs it is PostmasterIsAlive() in src/backend/storage/ipc/pmsignal.c.
You can check whether it works by noting whether the stats processes
shut down when the postmaster goes away ...

> If you need the pgstat process to keep track of it's chlid (the other
> pgstat process), you'd need it once there too.

The pgstat processes (and everything else launched by the postmaster)
now use write/read_backend_variables, so copying the handle there should
be sufficient.

			regards, tom lane