Re: [PATCHES] Bad bug in fopen() wrapper code - Mailing list pgsql-hackers

From Tom Lane
Subject Re: [PATCHES] Bad bug in fopen() wrapper code
Date
Msg-id 14631.1159638870@sss.pgh.pa.us
Whole thread Raw
In response to Re: [PATCHES] Bad bug in fopen() wrapper code  ("Claudio Natoli" <claudio.natoli@memetrics.com>)
Responses Re: [PATCHES] Bad bug in fopen() wrapper code  ("Magnus Hagander" <mha@sollentuna.net>)
List pgsql-hackers
"Claudio Natoli" <claudio.natoli@memetrics.com> writes:
> Magnus Hagander writes:
>> Now, I still twist my head around the lines:
>> if ((fd = _open_osfhandle((long) h, fileFlags & O_APPEND)) < 0
>> ||
>> (fileFlags & (O_TEXT | O_BINARY) && (_setmode(fd,
>> fileFlags & (O_TEXT | O_BINARY)) < 0)))

> Without having studied it closely, it might also highlight a bug on failure of the second clause -- if the _setmode
fails,shouldn't _close be called instead of CloseHandle, and -1 returned?  (CloseHandle would still be called on
failureof the _open_osfhandle, obviously) 

I agree that this code is both wrong and unreadable (although in
practice the _setmode will probably never fail, which is why our
attention hasn't been drawn to it).  Is someone going to submit a
patch?  I'm hesitant to change the code myself since I'm not in
a position to test it.

            regards, tom lane

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