Re: Win32 question: getppid() with no parent?
От | Magnus Hagander |
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Тема | Re: Win32 question: getppid() with no parent? |
Дата | |
Msg-id | 6BCB9D8A16AC4241919521715F4D8BCE1716A5@algol.sollentuna.se обсуждение исходный текст |
Ответ на | Win32 question: getppid() with no parent? (Tom Lane <tgl@sss.pgh.pa.us>) |
Ответы |
Re: Win32 question: getppid() with no parent?
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Список | pgsql-hackers-win32 |
>> Question though - we keep a PostmasterPid variable, right? > >Yeah we do; we must have it to signal the postmaster from the children. > >> (If we can't rely on that variable, we could do a win32 specific hack >> that passes the HANDLE of the postmaster down to the child on exec, I >> guess.) > >Is this just like passing a variable value, or is there some more >protection involved? It is passing a variable. *Before* you parse it, you have to make it inheritable by doing something along the line of: DuplicateHandle(GetCurrentProcess(), GetCurrentProcess(), GetCurrentProcess(), &targetHandle, 0, TRUE, DUPLICATE_SAME_ACCESS); (If you just do GetCurrentProcess() it will return a hard-coded pseudohandle. So if you use that handle in the child process, it will point to the child process. DuplicateHandle will turn it into a real handle) //Magnus
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