From: Jarkko Hietaniemi <jhi@iki.fi>
Date: Fri, 11 Jul 2003 00:21:43 +0000 (+0000)
Subject: New order of seed.
X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=commitdiff_plain;h=99c877a1ede996bce9129fe302f92f7e1ed9b77d;p=p5sagit%2Fp5-mst-13.2.git

New order of seed.

p4raw-id: //depot/perl@20139
---

diff --git a/pod/perlrun.pod b/pod/perlrun.pod
index 730c75d..2a57b6c 100644
--- a/pod/perlrun.pod
+++ b/pod/perlrun.pod
@@ -1109,19 +1109,20 @@ PERL_ENCODING environment variable is consulted for an encoding name.
 =item PERL_HASH_SEED
 
 (Since Perl 5.8.1.)  Used to randomise Perl's internal hash function.
-To emulate the pre-5.8.1 behaviour, set to an integer (zero means
-exactly the same order as 5.8.0).  "Pre-5.8.1" means, among other
-things, that hash keys will be ordered the same between different runs
-of Perl.
 
-The default behaviour is to randomise unless the PERL_HASH_SEED is set.
-If Perl has been compiled with C<-DUSE_HASH_SEED_EXPLICIT>, the default
-behaviour is B<not> to randomise unless the PERL_HASH_SEED is set.
+The default behaviour is B<not> to randomise if the PERL_HASH_SEED is
+unset.  If Perl has been compiled with C<-DUSE_HASH_SEED>, the default
+behaviour B<is> to randomise.  If Perl hash been compiled with
+C<-DNO_HASH_SEED>, the hash randomisation is completely disabled.
+
+If PERL_HASH_SEED is set to a numeric (positive integer) string,
+that is used as the seed.
 
 If PERL_HASH_SEED is unset or set to a non-numeric string, Perl uses
 the pseudorandom seed supplied by the operating system and libraries.
-This means that each different run of Perl will have a different
-ordering of the results of keys(), values(), and each().
+
+The seed being set means that each different run of Perl will have
+a different ordering of the results of keys(), values(), and each().
 
 See L<perlsec/"Algorithmic Complexity Attacks"> for more information.