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manu@netbsd.org (Emmanuel Dreyfus) writes:

> Right. So there are no way of performing two DNS lookups at the same
> time from the same process?
>
> One solution is to serialize the lookups using locks, but that is not a
> very good option since a DNS lookup can take several seconds. 

That is the only solution, application shouldn't assume res_search is
treadsafe/re-enterat. But see comment below.

> Do I get a fix by linking with BIND8 resolver? (or BIND9? Is BIND8
> resolver thread safe?) Is it possible? Won't that clash at link time
> with the resolver function available in libc?

You program/library have to use res_ninit/res_nsearch that is part of the
bind8/9 api.

Love


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