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Thu, 04 Apr 2002 17:03:57 +0100
Mozilla/5.0 (X11; U; Linux i686; en-US; rv:0.9.9) Gecko/20020311
I'm having serious trouble with this function
in a multithreaded application.
1. It seems to use a global lock! so multiple
threads block in it. Is this correct? Can
it be changed?
2. When DNS settings are changed while the
multithreaded app is running it seems to
get completely confused and will arbitrarily
fail the lookup for specific hosts. I.E.
looking up "cygnus.com" will sometimes work
but mostly fail. Specifically adding a nameserver
to /etc/resolv.conf while the app is running will
cause lookups to arbitrarily fail. If the app starts
with the correct nameserver in /etc/resolv.conf
then all is OK.
3. In the e.g. below, does the function return it's
error code in, errno, res or herr? I've seen
e.g. code on the net using all 3 methods! My
application uses res.
res = gethostbyname_r(,,,,,&herr);
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Padraig Brady <=