Is fork() hook ever possible?
Poul-Henning Kamp
phk at phk.freebsd.dk
Wed Sep 17 09:24:09 UTC 2008
In message <20080917090101.GC57480 at nagual.pp.ru>, Andrey Chernov writes:
>On Wed, Sep 17, 2008 at 08:04:57AM +0000, Poul-Henning Kamp wrote:
>> >The situation is not so simple since the library functions can call
>> >ar4random() internally (like mktemp() family already and always does)
>>
>> I have a really hard time seeing how this could become a performance
>> issue, ever.
>
>The performance issue happens when application tries to call arc4random()
>in the loop.
That is not what we are talking about, we are talking about the calls
in mktemp and similar.
>> The solution however, is simple: Just have these hidden library calls
>> to arc4random call a wrapper function that does the pid check.
>
>We can control our own arc4random() internal calls inside our own libs in
>such way but can't control 3rd party libs or programs arc4random() calls
>(consider ports).
We are not obliged to control these calls. If their authors do something
stupid, it's not our problem.
You are, as usual, trying to vastly overengineer a minor problem that
has a simple solution.
Just have the FreeBSD library calls, call the wrapper function that
does a pid check and be done with it.
--
Poul-Henning Kamp | UNIX since Zilog Zeus 3.20
phk at FreeBSD.ORG | TCP/IP since RFC 956
FreeBSD committer | BSD since 4.3-tahoe
Never attribute to malice what can adequately be explained by incompetence.
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