Date: Mon, 09 Aug 1999 15:41:20 PDT From: "Steve Tarkalson" <steve_tarkalson@hotmail.com> To: ognir@humboldt1.com, bmcgover@cisco.com Cc: dan@trinsec.com, hackers@FreeBSD.ORG Subject: Re: gethostbyaddr() and threads. Message-ID: <19990809224120.39659.qmail@hotmail.com>
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this is solved by one of two methods:
1-) require the caller of gethostbyaddr() to supply a pointer to
a hostent struct which will be filled.
or 2-) the library uses thread specific storage which is re-used in
each call.
>From: Joe Groff <ognir@humboldt1.com>
>Reply-To: ognir@humboldt1.com
>To: bmcgover@cisco.com
>CC: dan@trinsec.com, hackers@FreeBSD.ORG
>Subject: Re: gethostbyaddr() and threads.
>Date: Mon, 9 Aug 1999 14:21:38 -0700 (PDT)
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>---Brian McGovern said:
> > [snip]
> >
> > gethostbyaddr... actually, most of the gethostby* functions... are not
> > thread safe. They all use a static buffer in the library.
> >
> > Therefore, with threads, if you don't take precautions, I'd expect your
> > results to be odd.
> > -Brian
> >
>Couldn't this be easily fixed? I haven't looked at the source yet, but I
>believe you could replaced the static buffers with a dynamically-allocated
>list
>of buffers, with one for each thread using the gethost functions. Or
>perhaps
>you could just eliminate all the static stuff altogether?
>
>-Joe
>
>
>
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