| Current File : /var/lib/dpkg/info/libc6:amd64.preinst |
#!/bin/sh
set -e
export LC_ALL=C
type=$1
preversion=$2
kernel_compare_versions () {
verA=$(($(echo "$1" | sed 's/\([0-9]*\)\.\([0-9]*\).*/\1 \* 100 + \2/')))
verB=$(($(echo "$3" | sed 's/\([0-9]*\)\.\([0-9]*\).*/\1 \* 100 + \2/')))
test $verA -$2 $verB
}
if [ "$type" != abort-upgrade -a -z "$DPKG_ROOT" ]
then
# Check if the debconf module is available and usable
USE_DEBCONF=
if [ "$DEBIAN_HAS_FRONTEND" ]; then
# Debconf is already loaded, so we already checked if the frontend
# is usable or not
USE_DEBCONF=1
elif [ -f /usr/share/debconf/confmodule ]; then
# cdebconf has a working fallback mechanism in case dialog
# is not usable, so do not try to do anything smart here
if [ "$DEBCONF_USE_CDEBCONF" ] ; then
USE_DEBCONF=1
# debconf requires perl
elif perl -e "" 2>/dev/null ; then
# Check that the selected frontend will work
if [ -n "$DEBIAN_FRONTEND" ] ; then
frontend="$DEBIAN_FRONTEND"
else
# Query the frontend without first sourcing the confmodule to avoid
# losing control of the tty. This snippet must not be copied blindly.
frontend="$(echo 'GET debconf/frontend' | debconf-communicate | sed '/^0 /!d;s/^0 //')"
frontend="${frontend:-Dialog}"
fi
frontend=`echo $frontend | tr '[:upper:]' '[:lower:]'`
case "$frontend" in
dialog)
# debconf uses whiptail by default unless dialog is available and
# $DEBCONF_FORCE_DIALOG is set
if [ -x "$(which whiptail)" ] && ! ( [ -n "$DEBCONF_FORCE_DIALOG" ] && [ -x "$(which dialog)" ] ); then
frontend=whiptail
fi
# Only enable debconf if the whiptail/dialog are not available
# (in which case debconf has a fallback mechanism) or usable
if ! [ -x "$(which $frontend)" ] || $frontend --version > /dev/null 2>&1 ; then
USE_DEBCONF=1
fi
;;
*)
# For now assume that all other frontends are fine
USE_DEBCONF=1
;;
esac
fi
fi
# Load debconf module if available and usable
if [ "$USE_DEBCONF" ]; then
. /usr/share/debconf/confmodule
fi
# See if LD_LIBRARY_PATH contains the traditional /lib, but not the
# multiarch path
dirs=$(echo $LD_LIBRARY_PATH | sed 's/:/ /g')
for dir in $dirs ; do
dir=$(readlink -e $dir || true)
case "$dir" in
/lib)
seen_traditional=1
;;
/lib/x86_64-linux-gnu)
seen_multiarch=1
;;
esac
done
if test -n "$seen_traditional" && test -z "$seen_multiarch" ; then
echo
echo "LD_LIBRARY_PATH contains the traditional /lib directory,"
echo "but not the multiarch directory /lib/x86_64-linux-gnu."
echo "It is not safe to upgrade the C library in this situation;"
echo "please remove the /lib/directory from LD_LIBRARY_PATH and"
echo "try again."
echo
exit 1
fi
# glibc kernel version check
system=`uname -s`
if [ "$system" = "Linux" ]
then
# sanity checking for the appropriate kernel on each architecture.
kernel_ver=`uname -r`
case ${DPKG_MAINTSCRIPT_ARCH} in
*)
# The GNU libc requires a >= 3.2 kernel, found in wheezy
kernel_ver_min=3.2
kernel_ver_rec=3.2
;;
esac
if kernel_compare_versions "$kernel_ver" lt $kernel_ver_min
then
if [ "$USE_DEBCONF" ]
then
db_version 2.0
db_fset glibc/kernel-too-old seen false
db_reset glibc/kernel-too-old
db_subst glibc/kernel-too-old kernel_ver $kernel_ver_rec
db_input critical glibc/kernel-too-old || true
db_go
db_stop
else
echo "ERROR: This version of the GNU libc requires kernel version"
echo "$kernel_ver_rec or later. Please upgrade your kernel before installing"
echo "glibc."
echo
fi
exit 1
fi
if kernel_compare_versions "$kernel_ver" lt $kernel_ver_rec
then
if [ "$USE_DEBCONF" ]
then
db_version 2.0
db_fset glibc/kernel-not-supported seen false
db_reset glibc/kernel-not-supported
db_subst glibc/kernel-not-supported kernel_ver $kernel_ver_rec
db_input critical glibc/kernel-not-supported || true
db_go
db_stop
else
echo "WARNING: This version of the GNU libc requires kernel version"
echo "$kernel_ver_rec or later. Older versions might work but are not officially"
echo "supported. Please consider upgrading your kernel."
echo
fi
fi
elif [ $system = "GNU/kFreeBSD" ]
then
kernel_ver=`uname -r`
kernel_ver_min=8.3
if kernel_compare_versions "$kernel_ver" lt $kernel_ver_min
then
if [ "$USE_DEBCONF" ]
then
db_version 2.0
db_version 2.0
db_fset glibc/kernel-too-old seen false
db_reset glibc/kernel-too-old
db_subst glibc/kernel-too-old kernel_ver $kernel_ver_min
db_input critical glibc/kernel-too-old || true
db_go
db_stop
else
echo "ERROR: This version of the GNU libc requires kernel version"
echo "$kernel_ver_min or later. Please upgrade your kernel before installing"
echo "glibc."
echo
fi
exit 1
fi
fi
fi
if [ "$type" = upgrade -a -z "$DPKG_ROOT" ]
then
if [ -n "$preversion" ] && [ -x "$(which ischroot)" ] && ! ischroot; then
# NSS authentication trouble guard
if dpkg --compare-versions "$preversion" lt 2.31; then
if pidof xscreensaver xlockmore >/dev/null; then
if [ "$USE_DEBCONF" ] ; then
db_version 2.0
db_reset glibc/disable-screensaver
db_input critical glibc/disable-screensaver || true
db_go || true
else
echo "xscreensaver and xlockmore must be restarted before upgrading"
echo
echo "One or more running instances of xscreensaver or xlockmore have been"
echo "detected on this system. Because of incompatible library changes, the"
echo "upgrade of the GNU C library will leave you unable to authenticate to"
echo "these programs. You should arrange for these programs to be restarted"
echo "or stopped before continuing this upgrade, to avoid locking your users"
echo "out of their current sessions."
echo
frontend=`echo "$DEBIAN_FRONTEND" | tr '[:upper:]' '[:lower:]'`
if [ "$frontend" = noninteractive ]; then
echo "Non-interactive mode, upgrade glibc forcibly"
else
echo -n "Press a key to continue"
read answer
fi
echo
fi
fi
check="kdm postgresql xdm"
# NSS services check:
echo -n "Checking for services that may need to be restarted..."
# Only get the ones that are installed, of the same architecture
# as libc (or arch all) and configured. Restart openssh-server even
# if only half-configured to continue accepting new connections
# during the upgrade.
check=$(dpkg-query -W -f='${binary:Package} ${Status} ${Architecture}\n' $check 2> /dev/null | \
grep -E "(^openssh-server .* unpacked|installed) (all|${DPKG_MAINTSCRIPT_ARCH})$" | sed 's/[: ].*//')
# some init scripts don't match the package names
check=$(echo $check | \
sed -e's/\bapache2.2-common\b/apache2/g' \
-e's/\bat\b/atd/g' \
-e's/\bdovecot-common\b/dovecot/g' \
-e's/\bexim4-base\b/exim4/g' \
-e's/\blpr\b/lpd/g' \
-e's/\blpr-ppd\b/lpd-ppd/g' \
-e's/\bmysql-server\b/mysql/g' \
-e's/\bopenssh-server\b/ssh/g' \
-e's/\bsasl2-bin\b/saslauthd/g' \
-e's/\bsamba\b/smbd/g' \
-e's/\bpostgresql-common\b/postgresql/g' \
)
echo
echo "Checking init scripts..."
for service in $check; do
invoke-rc.d ${service} status >/dev/null 2>/dev/null && status=0 || status=$?
if [ "$status" = "0" ] || [ "$status" = "2" ] ; then
services="$service $services"
elif [ "$status" = "100" ] ; then
echo "WARNING: init script for $service not found."
fi
done
if [ -n "$services" ]; then
if [ "$USE_DEBCONF" ] ; then
db_version 2.0
db_reset glibc/upgrade
db_subst glibc/upgrade services $services
db_input critical glibc/upgrade || true
db_go || true
db_get glibc/upgrade
answer=$RET
else
echo "Do you want to upgrade glibc now?"
echo
echo "Running services and programs that are using NSS need to be restarted,"
echo "otherwise they might not be able to do lookup or authentication any more."
echo "The installation process is able to restart some services (such as ssh or"
echo "telnetd), but other programs cannot be restarted automatically. One such"
echo "program that needs manual stopping and restart after the glibc upgrade by"
echo "yourself is xdm - because automatic restart might disconnect your active"
echo "X11 sessions."
echo
echo "This script detected the following installed services which must be"
echo "stopped before the upgrade: $services"
echo
echo "If you want to interrupt the upgrade now and continue later, please"
echo "answer No to the question below."
echo
frontend=`echo "$DEBIAN_FRONTEND" | tr '[:upper:]' '[:lower:]'`
if [ "$frontend" = noninteractive ]; then
echo "Non-interactive mode, upgrade glibc forcibly"
answer=true
else
echo -n "Do you want to upgrade glibc now? [Y/n] "
read answer
case $answer in
Y*|y*) answer=true ;;
N*|n*) answer=false ;;
*) answer=true ;;
esac
fi
echo
fi
if [ "x$answer" != "xtrue" ]; then
echo "Stopped glibc upgrade. Please retry the upgrade after you have"
echo "checked or stopped services by hand."
exit 1
fi
fi
fi # end upgrading and $preversion lt 2.31
fi # Upgrading
# This will keep us from using hwcap libs (optimized) during an
# upgrade.
touch /etc/ld.so.nohwcap
fi
if [ -n "$preversion" ]; then
if dpkg --compare-versions "$preversion" lt 2.31; then
# unconditionally wipe ld.so.cache on major version upgrades; this
# makes those upgrades a bit slower, but is less error-prone than
# hoping we notice every time the cache format is changed upstream
rm -f "$DPKG_ROOT/etc/ld.so.cache"
rm -f "$DPKG_ROOT/var/cache/ldconfig/aux-cache"
fi
fi
exit 0