PC Welt 2006 November (DVD)/PCWELT_11_2006.ISO/casper/filesystem.squashfs/var/lib/dpkg/info/libc6.preinst

Text File | 2006-08-17 | 11.9 KB | 371 lines

#!/bin/sh
set -e
export LC_ALL=C

if [ "$1" = upgrade ]
then
    if dpkg --compare-versions "$2" le 2.2.2-4 && test -e /lib/libdb.so.3; then
    # Make upgrades to newer libdb.so.3 easier
    cat /lib/libdb.so.3 > /lib/libdb.so.3.old
    fi
    if dpkg --compare-versions "$2" le 2.1.1-0.1; then
    if [ -f /var/run/utmpd.pid ]; then
        if kill -s TERM `cat /var/run/utmpd.pid` > /dev/null 2>&1
        then
        if [ -f /var/run/utmp ]; then
            cp /dev/null /var/run/utmp
            if grep '^utmp:' /etc/group; then
            chown root:utmp /var/run/utmp
            chmod 664 /var/run/utmp
            else
            chown root:root /var/run/utmp
            chmod 644 /var/run/utmp
            fi
        fi
        if [ -f /var/log/wtmp ]; then
            savelog /var/log/wtmp
            touch /var/log/wtmp
            if grep '^utmp:' /etc/group; then
            chown root:utmp /var/log/wtmp
            chmod 664 /var/log/wtmp
            else
            chown root:root /var/log/wtmp
            chmod 644 /var/log/wtmp
            fi
        fi
        rm -f /etc/init.d/utmpd
        update-rc.d utmpd remove > /dev/null
        fi
    fi
    if [ -f /var/run/utmpx ]; then rm -f /var/run/utmpx; fi
    if [ -f /var/log/wtmpx ]; then rm -f /var/log/wtmpx*; fi
    if [ -e /var/run/utmpd.ro ]; then rm -f /var/run/utmpd.ro; fi
    if [ -e /var/run/utmpd.rw ]; then rm -f /var/run/utmpd.rw; fi
    fi

    # NSS authentication trouble guard
    if dpkg --compare-versions $2 lt 2.3.5-1; then
    check="xdm kdm gdm postgresql xscreensaver"
    # Only get the ones that are installed, and configured
    service=$(dpkg -s $check 2> /dev/null | awk 'BEGIN{RS="\n\n";FS="\n"}{if ( $2 ~ /Status: .* installed$/ ) { print $1 } }' | cut -f 2 -d ' ')

    echo
    echo "Name Service Switch update in the C Library: pre-installation question."
    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 "Known packages that need to be stopped before the glibc upgrade are:"
    echo "        $check"
    echo

    if [ -n "$service" ]; then
        echo "This script detected the following installed services which must be"
        echo "stopped before the upgrade:"
        echo "        $service"
    else
        echo "This script did not detect any installed services which need to be"
        echo "stopped."
    fi
    echo
    echo "If you want to interrupt the upgrade now and continue later, please"
    echo "answer No to the question below."
    echo
    frontend=`echo "$DEBIAN_FRONTEND" | tr '[:upper:]' '[:lower:]'`
    if [ "$frontend" = noninteractive ]; then
        echo "Non-interactive mode, upgrade glibc forcibly"
        answer=yes
    else
        echo -n "Do you want to upgrade glibc now? [Y/n] "
        read answer
        case $answer in
        Y*|y*) answer=yes ;;
        N*|n*) answer=no ;;
        *) answer=yes ;;
        esac
    fi
    echo
    if [ "$answer" = no ]; then
        echo "Stopped glibc upgrade.  Please retry the upgrade after you have"
        echo "checked or stopped services by hand."
        exit 1
    fi
    fi

    # This will keep us from using hwcap libs (optimized) during an
    # upgrade.
    touch /etc/ld.so.nohwcap
    echo glibc >> /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 old
# libc4 or libc5, and libraries incompatible with the to-be-installed
# ld.so.

check_dirs () {
  for dir in $*; do
    # Follow symlinks
    dirlink=$(readlink -f $dir)
    [ -n "$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 $dir | egrep '^lib(c|m|pthread|rt|dl)\.so\.[^/]*$' |\
           egrep -v '^lib[cm]\.so\.[45].*$' 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`
        for ld_so in $ld_so_list
        do
          if test -f "$ld_so"; then
            ldbytes=`head -c 20 $ld_so | od -c`
            if test "$ldbytes" = "$libbytes"; then
              echo "Matching libraries: $dir/$lib $ld_so"
              return 0
            fi
          fi
        done
      fi
    done
      fi
    fi
  done
  return 1
}

if [ "$1" != abort-upgrade ]
then
  ld_so_list="/lib/ld-linux.so.2 /lib64/ld-linux-x86-64.so.2"
  dirs="/usr/local/lib /usr/local/lib32 /usr/local/lib64"
  if ! test -L /usr; then
    dirs="$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
fi

if [ "$1" != abort-upgrade ] && [ "`uname -s`" = Linux ]
then
    # glibc kernel version check: KERNEL_VERSION_CHECK
kernel_compare_versions () {
    verA=$(($(echo "$1" | sed 's/\([0-9]*\)\.\([0-9]*\)\.\([0-9]*\).*/\1 \* 10000 + \2 \* 100 + \3/')))
    verB=$(($(echo "$3" | sed 's/\([0-9]*\)\.\([0-9]*\)\.\([0-9]*\).*/\1 \* 10000 + \2 \* 100 + \3/')))

    test $verA -$2 $verB
}

exit_check () {

    exit 1
}

    # 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=$(uname -r | tr -- - . | cut -d. -f3 | tr -d '[:alpha:]')
    kernel_rev=$(uname -r | sed 's/\([0-9]*\.[0-9]*\.\)\([0-9]*\)\(.*\)/\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_check
    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


    # intel i386 requires a recent kernel
    if [ "$realarch" = i386 ]
    then
    # From glibc 2.3.5-7 and linux-2.6 2.6.12-1, real-i386 is dropped.
    #if kernel_compare_versions "$kernel_ver" lt 2.4.24
    #then
        echo WARNING: This machine has real i386 class processor.
        echo Debian etch and later does not support such old hardware
        echo any longer.
        echo The reason is that \"bswap\" instruction is not supported
        echo on i386 class processors, and some core libraries have
        echo such instruction.  You\'ll see illegal instruction error
        echo when you upgrade your Debian system.
        exit_check
    #fi
    fi

    # The GNU libc is now built with --with-kernel= >= 2.4.1, except on m68k
    if [ "$realarch" != m68k ]
    then
    if kernel_compare_versions "$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.
        exit_check
    fi
    fi
    # SPARC sun4m requires a recent kernel
    if [ "$realarch" = sparc ]
    then
    cputype=`egrep '^type.*:.*sun4m' /proc/cpuinfo 2> /dev/null` || true

    if [ "$cputype" != "" ]
    then
        if kernel_compare_versions "$kernel_ver" lt 2.4.21
        then
        echo WARNING: You have a cpu which requires kernel 2.4.21
        echo or greater in order to install this version of glibc.
        echo Please upgrade the kernel before installing this package.
        echo
        echo You should be able to install the latest version of the
        echo sparc kernel-image in order to satisfy this need. You
        echo can also download and compile the latest kernel source
        echo yourself from a kernel mirror \(see http://www.kernel.org/\).
        exit_check
        fi
    fi
    fi
    # HPPA boxes require latest fixes in the kernel to function properly.
    if [ "$realarch" = parisc ]
    then
    if kernel_compare_versions "$kernel_ver" lt 2.4.17
    then
        echo WARNING: This version of glibc requires that you be running
        echo atleast a 2.4.17 kernel in order to work properly. Earlier
        echo kernels did not provide the proper functionality in order
        echo for the system to be stable.
        exit_check
    fi
    fi
    # parisc64 boxes require latest fixes in the kernel 2.4.19-pa17 or later
    # (in 2.4.x), 2.5.53-pa3 or later (in 2.5.x), to function properly.
    # Note that parisc64 kernel version scheme is "`uname -r`-64".
    if [ "$realarch" = parisc64 ]
    then
    kernel_ver_pa=$(echo "$kernel_ver" | sed 's/pa//')
    if [ "$kernel_ver" = "$kernel_ver_pa" ]
    then
        if kernel_compare_versions "$kernel_ver" lt 2.4.19-64
        then
        echo WARNING: This version of glibc requires that you be
        echo running at least a 2.4.19-64 to work properly.
        echo Earlier kernels did not provide the proper functionality
        echo in order for the system to be stable.
        exit_check
        fi
    else
        if kernel_compare_versions "$kernel_ver" lt 2.4.19-pa17
        then
        echo WARNING: This version of glibc requires that you be
        echo running at least a 2.4.19-pa17 in \(2.4\) or 2.5.53-pa3
        echo \(in 2.5\) to work properly.
        echo Earlier kernels did not provide the proper functionality
        echo in order for the system to be stable.
        exit_check
        fi
    fi
    fi

    if [ "$realarch" = mips ] \
    && [ i386 = mips ]
    then
    # MIPS (but not mipsel) require a kernel update for the msq fixes.
    if kernel_compare_versions "$kernel_ver" lt 2.4.22
    then
        echo WARNING: System V message queues require kernel 2.4.22 to
        echo work correctly on this architecture.  Some programs
        echo "(including perl) may not operate correctly."
        exit_check
    fi
    fi

    # amd64 requires 2.6 kernel because we drop to support linuxthreads
    if [ "$realarch" = x86_64 ] \
    && [ i386 = amd64 ]
    then
    if kernel_compare_versions "$kernel_ver" lt 2.6.0
    then
        echo WARNING: POSIX threads library NPTL requires 2.6 and
        echo later kernel on amd64.  If you use 2.4 kernel, please
        echo upgrade your kernel before installing glibc.
        exit_check
    fi
    fi

    # In Ubuntu, we have dropped LinuxThreads.  We require the 2.6 kernel.
    if kernel_compare_versions "$kernel_ver" lt 2.6.0
    then
        echo WARNING: POSIX threads library NPTL requires 2.6 and
        echo later kernel.  You are using a 2.4 kernel, please
        echo upgrade your kernel before installing glibc.
        exit_check
    fi

fi



exit 0