cvs commit: src/lib/libc/stdlib getenv.c
scf at FreeBSD.org
Fri Aug 8 00:49:42 UTC 2008
scf 2008-08-08 00:49:28 UTC
FreeBSD src repository
Modified files: (Branch: RELENG_7)
SVN rev 181407 on 2008-08-08 00:49:28Z by scf
MFC: r181150, r181266
Detect if the application has cleared the environ variable by setting
the first value (environ) to NULL. This is in addition to the
current detection of environ being replaced, which includes being set to
NULL. Without this fix, the environment is not truly wiped, but appears
to be by getenv() until an *env() call is made to alter the enviroment.
This change is necessary to support those applications that use this
method for clearing environ such as Dovecot and Postfix. Applications
such as Sendmail and the base system's env replace environ (already
detected). While neither of these methods are defined by SUSv3, it is
best to support them due to historic reasons and in lieu of a clean,
Add extra units tests for clearing environ using four different methods:
1. Set environ to NULL pointer.
2. Set environ to NULL pointer.
3. Set environ to calloc()'d NULL-terminated array.
4. Set environ to static NULL-terminated array.
Noticed by: Timo Sirainen
Reviewed by: ache
Revision Changes Path
220.127.116.11 +20 -13 src/lib/libc/stdlib/getenv.c
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