Bug#304257: libc6: libc.preinst may break noninteractive install under some locales

[Denis Barbier <barbier@debian.org>]

Package: libc6
Version: 2.3.2.ds1-20
Severity: important
Tags: patch

This snippet in libc.preinst:

  frontend=`echo "$DEBIAN_FRONTEND" | tr '[:upper:]' '[:lower:]'`
  if [ "$frontend" = noninteractive ]; then

can misbehave under Turkish locales, because tolower(I) != i
The simplest solution (not tested though) is to force LC_ALL to C,
as is already done in libc.postinst.

Denis

Index: debian/debhelper.in/libc.preinst
===================================================================
--- debian/debhelper.in/libc.preinst	(revision 881)
+++ debian/debhelper.in/libc.preinst	(working copy)
@@ -1,5 +1,6 @@
 #!/bin/bash
 set -e
+export LC_ALL=C
 
 dpkg --assert-support-predepends