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Message-ID: <alpine.LNX.2.00.1408311405570.5292@monopod.intra.ispras.ru>
Date: Sun, 31 Aug 2014 14:25:18 +0400 (MSK)
From: Alexander Monakov <amonakov@...ras.ru>
To: musl@...ts.openwall.com
Subject: Retention of LD_LIBRARY_PATH
(related to setproctitle discussion on IRC)
The dynamic loader in musl retains a pointer to LD_LIBRARY_PATH from the
initial environment, which is exposed to the application via 'char **environ'.
Changes to environ may cause subsequent calls to dlopen to use different
search paths, but modifications via setenv and putenv do not have such effect.
dlopen(3) in Linux man pages mentions specifically that the value of
LD_LIBRARY_PATH from program start up is used. Glibc stores a duplicate of
the initial value, and modifications to the environment do not affect search
paths for dlopen.
Alexander
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