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Article #750Re: DosSetFHState() and Pipes -- problem
From: Mark Alexander
Date: Sat, 05 Sep 1992 00:12
Date: Sat, 05 Sep 1992 00:12
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1290 bytes
In article <1992Sep4.170103.24099@reed.edu> celarier@reed.edu (Stuart Celarier) writes: >This code fragement (with appropriate parameters and error checking) compiled >just fine, but on execution every one of the DosSetFHState() calls returns an >error code 87 -- bad parameter. I went through this pain once, too, and discovered that you have to clear bits 0-2, 4-6, and 15 in the file handle flags. This is documented in the OS/2 2.0 CPP Reference, on the page for DosFHState. So the code to turn off handle inheritance looks like this: ULONG fhstate; if (DosQueryFHState(handle, &fhstate) != 0) ...; fhstate = (fhstate & ~0x8077) | OPEN_FLAGS_NOINHERIT; if (DosSetFHState(handle, fhstate) != 0) ...; I hope this fixes your problem.
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Path: arc1-ca.pugleaf.net!sparky!uunet!olivea!hal.com!decwrl!borland.com!alexande From: alexande@genghis.borland.com (Mark Alexander) Newsgroups: comp.os.os2.programmer Subject: Re: DosSetFHState() and Pipes -- problem Keywords: OS/2 2.0, API, DosSetFHState, anonymous pipes Message-ID: <1992Sep5.001241.14644@genghis.borland.com> Date: 5 Sep 92 00:12:41 GMT References: <1992Sep4.170103.24099@reed.edu> Sender: news@borland.com (News Admin) Organization: Borland International Lines: 18 Originator: alexande@genghis.borland.com