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| Current File : /var/lib/dpkg/info/libc6.preinst |
#!/bin/sh
set -e
export LC_ALL=C
type=$1
preversion=$2
rm_conffile() {
local PKGNAME="$1"
local CONFFILE="$2"
[ -e "$CONFFILE" ] || return 0
local md5sum="$(md5sum $CONFFILE | sed -e 's/ .*//')"
local old_md5sum="$(dpkg-query -W -f='${Conffiles}' $PKGNAME | \
sed -n -e "\' $CONFFILE ' { s/ obsolete$//; s/.* //; p }")"
if [ "$md5sum" != "$old_md5sum" ]; then
echo "Obsolete conffile $CONFFILE has been modified by you."
echo "Saving as $CONFFILE.dpkg-bak ..."
mv -f "$CONFFILE" "$CONFFILE".dpkg-bak
else
echo "Removing obsolete conffile $CONFFILE ..."
rm -f "$CONFFILE"
fi
}
linux_compare_versions () {
verA=$(($(echo "$1" | sed 's/^\([0-9]*\.[0-9]*\)\([^.0-9]\|$\)/\1.0\2/; s/\([0-9]*\)\.\([0-9]*\)\.\([0-9]*\).*/\1 \* 10000 + \2 \* 100 + \3/')))
verB=$(($(echo "$3" | sed 's/^\([0-9]*\.[0-9]*\)\([^.0-9]\|$\)/\1.0\2/; s/\([0-9]*\)\.\([0-9]*\)\.\([0-9]*\).*/\1 \* 10000 + \2 \* 100 + \3/')))
test $verA -$2 $verB
}
kfreebsd_compare_versions () {
verA=$(($(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 $verB
}
kernel26_help() {
echo ""
echo "The installation of a 2.6 kernel _could_ ask you to install a new libc"
echo "first, this is NOT a bug, and should *NOT* be reported. In that case,"
echo "please add lenny sources to your /etc/apt/sources.list and run:"
echo " apt-get install -t lenny linux-image-2.6"
echo "Then reboot into this new kernel, and proceed with your upgrade"
}
if [ "$type" = upgrade ]
then
# Remove old /etc/init.d/glibc.sh init script
if dpkg --compare-versions "$preversion" le "2.9-22"; then
rm_conffile libc6 "/etc/init.d/glibc.sh"
update-rc.d glibc.sh remove >/dev/null
fi
# Load debconf module if available
if [ -f /usr/share/debconf/confmodule ] ; then
. /usr/share/debconf/confmodule
fi
if [ -n "$preversion" ]; then
# NSS authentication trouble guard
if dpkg --compare-versions "$preversion" lt 2.11-1; then
if pidof xscreensaver xlockmore >/dev/null; then
if [ -f /usr/share/debconf/confmodule ] ; then
db_version 2.0
db_reset glibc/disable-screensaver
db_input critical glibc/disable-screensaver || true
db_go || true
else
echo "xscreensaver and xlockmore must be restarted before upgrading"
echo
echo "One or more running instances of xscreensaver or xlockmore have been"
echo "detected on this system. Because of incompatible library changes, the"
echo "upgrade of the GNU C library will leave you unable to authenticate to"
echo "these programs. You should arrange for these programs to be restarted"
echo "or stopped before continuing this upgrade, to avoid locking your users"
echo "out of their current sessions."
echo
frontend=`echo "$DEBIAN_FRONTEND" | tr '[:upper:]' '[:lower:]'`
if [ "$frontend" = noninteractive ]; then
echo "Non-interactive mode, upgrade glibc forcibly"
else
echo -n "Press a key to continue"
read answer
fi
echo
fi
fi
check="kdm postgresql xdm"
# NSS services check: NSS_CHECK
echo -n "Checking for services that may need to be restarted..."
# Only get the ones that are installed, and configured
check=$(dpkg -s $check 2> /dev/null | egrep '^Package:|^Status:' | awk '{if ($1 ~ /^Package:/) { package=$2 } else if ($0 ~ /^Status: .* installed$/) { print package }}')
# some init scripts don't match the package names
check=$(echo $check | \
sed -e's/\bapache2.2-common\b/apache2/g' \
-e's/\bat\b/atd/g' \
-e's/\bdovecot-common\b/dovecot/g' \
-e's/\bexim4-base\b/exim4/g' \
-e's/\blpr\b/lpd/g' \
-e's/\blpr-ppd\b/lpd-ppd/g' \
-e's/\bmysql-server\b/mysql/g' \
-e's/\bsasl2-bin\b/saslauthd/g' \
)
echo
echo "Checking init scripts..."
rl=$(runlevel | sed 's/.*\ //')
for service in $check; do
if [ -x "`which invoke-rc.d 2>/dev/null`" ]; then
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 $service not found."
fi
else
if [ -f /usr/share/file-rc/rc ] || [ -f /usr/lib/file-rc/rc ] && [ -f /etc/runlevel.conf ]; then
idl=$(filerc $rl $service)
else
idl=$(ls /etc/rc${rl}.d/S??${service} 2> /dev/null | head -1)
fi
if [ -n "$idl" ] && [ -x $idl ]; then
services="$service $services"
fi
fi
done
if [ -n "$services" ]; then
if [ -f /usr/share/debconf/confmodule ] ; 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 2.11-1
fi # Upgrading
# This will keep us from using hwcap libs (optimized) during an
# upgrade.
touch /etc/ld.so.nohwcap
fi
# Sanity check.
# If there are versions of glibc outside of the normal installation
# location (/lib, /lib64, etc.) then things may break very badly
# as soon as ld.so is replaced by a new version. This check is not
# foolproof, but it's pretty accurate. This script ignores libraries
# with different sonames, and libraries incompatible with the
# to-be-installed ld.so.
check_dirs () {
for dir in $*; do
# Follow symlinks
dirlink=$(readlink -e $dir)
[ -n "$dirlink" ] && dir=$dirlink
# Handle /lib in LD_LIBRARY_PATH.
if expr $dir : "/lib.*" > /dev/null; then
continue
fi
# Skip ia32-libs package on ia64, and similar libraries
# (not sure why these get added to /etc/ld.so.conf)
if expr $dir : "/emul/.*" > /dev/null; then
continue
fi
if test -d $dir; then
output=$(ls $dir | egrep '^(libc.so.6|libm.so.6|libpthread.so.0|librt.so.1|libdl.so.2)$' 2>/dev/null)
if test -n "$output"; then
# See if the found libraries are compatible with the system ld.so;
# if they aren't, they'll be ignored. Check e_ident, e_type (which
# will just be ET_DYN), and e_machine. If a match is found, there
# is a risk of breakage.
for lib in $output
do
if test -f "$dir/$lib"; then
libbytes=`head -c 20 $dir/$lib | od -c`
if test "$ldbytes" = "$libbytes"; then
echo "Matching libraries: $dir/$lib"
return 0
fi
fi
done
fi
fi
done
return 1
}
if [ "$type" != abort-upgrade ]
then
ldbytes=`head -c 20 /lib64/ld-linux-x86-64.so.2 | od -c`
dirs="/lib32 /lib64 /usr/local/lib /usr/local/lib32 /usr/local/lib64"
if ! test -L /usr; then
dirs="$dirs /usr/lib /usr/lib32 /usr/lib64"
fi
if check_dirs $dirs; then
echo
echo "A copy of glibc was found in an unexpected directory."
echo "It is not safe to upgrade the C library in this situation;"
echo "please remove that copy of the C library and try again."
exit 1
fi
if test -n "$LD_LIBRARY_PATH"; then
dirs=$(echo $LD_LIBRARY_PATH | sed 's/:/ /')
if check_dirs $dirs; then
echo
echo "Another copy of the C library was found via LD_LIBRARY_PATH."
echo "It is not safe to upgrade the C library in this situation;"
echo "please remove the directory from LD_LIBRARY_PATH and try again."
exit 1
fi
fi
if test -e /etc/ld.so.conf; then
dirs=$(echo $(cat /etc/ld.so.conf))
if check_dirs $dirs; then
echo
echo "Another copy of the C library was found via /etc/ld.so.conf."
echo "It is not safe to upgrade the C library in this situation;"
echo "please remove the directory from /etc/ld.so.conf and try again."
exit 1
fi
fi
for i in ld-2.3.2.so libc-2.3.2.so ld-2.3.6.so libc-2.3.6.so ; do
if [ -e /lib/tls/$i ] && ! dpkg-query -L libc6 2>/dev/null | grep -q /lib/tls/$i ; then
echo
echo "A non-dpkg owned copy of the C library was found in /lib/tls."
echo "It is not safe to upgrade the C library in this situation;"
echo "please remove that copy of the C library and try again."
exit 1
fi
done
if [ -e /lib/tls/i686/cmov/libc.so.6 ] || [ -e /lib/i686/cmov/libc.so.6 ] ; then
status_i686=$(dpkg -s libc6-i686 2>/dev/null | grep ^Status: | sed -e 's/^Status: \(.*\) \(.*\) \(.*\)/\3/g')
status_xen=$(dpkg -s libc6-xen 2>/dev/null | grep ^Status: | sed -e 's/^Status: \(.*\) \(.*\) \(.*\)/\3/g')
if ([ -z "$status_i686" ] || [ "$status_i686" = "not-installed" ] || [ "$status_i686" = "config-files" ]) && \
([ -z "$status_xen" ] || [ "$status_xen" = "not-installed" ] || [ "$status_xen" = "config-files" ]); then
echo
echo "A non-dpkg owned copy of the libc6-i686 package was found."
echo "It is not safe to upgrade the C library in this situation;"
echo "please remove that copy of the C library and try again."
exit 1
fi
fi
if [ -n "$LD_ASSUME_KERNEL" ] ; then
if dpkg --compare-versions "$LD_ASSUME_KERNEL" le "2.6.1"; then
echo
echo "POSIX threads library NPTL requires kernel version 2.6.1"
echo "or later. It appears that LD_ASSUME_KERNEL is set to $LD_ASSUME_KERNEL."
echo "It is not safe to upgrade the C library in this situation;"
echo "Please unset this environment variable and try again."
exit 1
fi
fi
# glibc kernel version check
system=`uname -s`
if [ "$system" = "Linux" ]
then
# Test to make sure z < 255, in x.y.z-n form of kernel version
# Also make sure we don't trip on x.y.zFOO-n form
kernel_rev=$(uname -r | sed 's/\([0-9]*\.\)\{1,2\}\([0-9]*\)\(.*\)/\2/')
if [ "$kernel_rev" -ge 255 ]
then
echo "WARNING: Your kernel version indicates a revision number"
echo "of 255 or greater. Glibc has a number of built in"
echo "assumptions that this revision number is less than 255."
echo "If you\'ve built your own kernel, please make sure that any"
echo "custom version numbers are appended to the upstream"
echo "kernel number with a dash or some other delimiter."
exit 1
fi
# sanity checking for the appropriate kernel on each architecture.
realarch=`uname -m`
kernel_ver=`uname -r`
# convert "armv4l" and similar to just "arm", and "mips64" and similar
# to just "mips"
case $realarch in
arm*) realarch="arm";;
mips*) realarch="mips";;
esac
# The GNU libc requires a >= 2.6.18 kernel (except on m68k)
if [ "$realarch" != m68k ]
then
if linux_compare_versions "$kernel_ver" lt 2.6.18
then
echo WARNING: this version of the GNU libc requires kernel version
echo 2.6.18 or later. Please upgrade your kernel before installing
echo glibc.
kernel26_help
exit 1
fi
fi
# The GNU libc is now built with --with-kernel= >= 2.4.1 on m68k
if [ "$realarch" = m68k ]
then
if linux_compare_versions "$kernel_ver" lt 2.4.1
then
echo WARNING: This version of glibc requires that you be running
echo kernel version 2.4.1 or later. Earlier kernels contained
echo bugs that may render the system unusable if a modern version
echo of glibc is installed.
kernel26_help
exit 1
fi
fi
# From glibc 2.6-3 SPARC V8 support is dropped.
if [ "$realarch" = sparc ]
then
# The process could be run using linux32, check for /proc.
if [ -f /proc/cpuinfo ]
then
case "$(sed '/^type/!d;s/^type.*: //g' /proc/cpuinfo)" in
sun4u)
# UltraSPARC CPU
;;
sun4v)
# Niagara CPU
;;
*)
echo "WARNING: This machine has a SPARC V8 or earlier class processor."
echo "Debian lenny and later does not support such old hardware"
echo "any longer."
exit 1
;;
esac
fi
fi
elif [ $system = "GNU/kFreeBSD" ] ; then
kernel_ver=`uname -r`
if kfreebsd_compare_versions "$kernel_ver" lt 6.0
then
echo WARNING: This version of glibc uses UMTX_OP_WAIT and UMTX_OP_WAKE
echo syscalls that are not present in the current running kernel. They
echo have been added in kFreeBSD 6.0. Your system should still work,
echo but it is recommended to upgrade to a more recent version.
fi
fi
fi
exit 0