Follow @Openwall on Twitter for new release announcements and other news
[<prev] [next>] [<thread-prev] [day] [month] [year] [list]
Date: Fri, 7 Apr 2017 20:01:44 +0200
From: Florian Weimer <>
Subject: Re: Re: libxslt math.random issue

On 04/07/2017 07:50 PM, Frank Ch. Eigler wrote:
> Florian Weimer wrote:
>> FWIW, why is glibc not doing srand(RANDOMVECTOR) during startup... :/
>> The C standard does not allow it.
>> ”
>> If rand is called before any calls to srand have been made, the same
>> sequence shall be generated as when srand is first called with a seed
>> value of 1.
>> ”
> Yes, but that does not imply that srand(1) needs to resolve to a
> build-constant value.

Sorry, I don't understand.  The standard also says, “If srand() is then 
called with the same seed value, the sequence of pseudo-random numbers 
shall be repeated.”

The sequences is *required* to be deterministic, and this is deliberate.


Powered by blists - more mailing lists

Please check out the Open Source Software Security Wiki, which is counterpart to this mailing list.

Confused about mailing lists and their use? Read about mailing lists on Wikipedia and check out these guidelines on proper formatting of your messages.