Personal Computer World 2007 September/PCWSEP07.iso/Software/Linux/Linux Mint 3.0 Light/LinuxMint-3.0-Light.iso/casper/filesystem.squashfs/var/lib/dpkg/info/netbase.postinst

Text File | 2007-03-30 | 4.7 KB | 181 lines

#!/bin/sh -e

if [ "$1" = "configure" ]; then
  . /usr/share/debconf/confmodule
fi

# Set an entry in sysctl.conf
set_sysctl() {
    if [ -n "$2" ]; then
        return
    elif [ "$2" = "no" ]; then
        value=0
    else
        value=1
    fi

    if [ -e /etc/sysctl.conf ]; then
        if grep "^$1=" /etc/sysctl.conf >/dev/null 2>&1; then
            echo >> /etc/sysctl.conf
            echo "# From /etc/network/options; commented out due to your setting above" >> /etc/sysctl.conf
            echo "#$1=$value" >> /etc/sysctl.conf
        elif grep "^# *$1=" /etc/sysctl.conf >/dev/null 2>&1; then
            sed -i -e "s,^# *$1=.*,$1=$value," /etc/sysctl.conf
        else
            echo >> /etc/sysctl.conf
            echo "# From /etc/network/options" >> /etc/sysctl.conf
            echo "#$1=$value" >> /etc/sysctl.conf
        fi
    else
        echo >> /etc/sysctl.conf
        echo "# From /etc/network/options" >> /etc/sysctl.conf
        echo "#$1=$value" >> /etc/sysctl.conf
    fi
}

# Convert the options file into sysctl.conf
migrate_options_file() {
    [ -n "$2" -a -e /etc/network/options ] || return 0
    dpkg --compare-versions "$2" lt "4.24ubuntu1" || return 0

    . /etc/network/options

    set_sysctl "net/ipv4/conf/all/rp_filter" "$spoofprotect"
    set_sysctl "net/ipv4/ip_forward"         "$ip_forward"
    set_sysctl "net/ipv4/tcp_syncookies"     "$syncookies"

    rm -f /etc/network/options
}

remove_old_files() {
  rm -f /etc/cron.daily/netbase /etc/network/spoof-protect
}

kill_portmapper() {
  if [ "$2" ] && dpkg --compare-versions $2 lt "3.11-2"; then
    if /usr/bin/rpcinfo -u localhost portmapper >/dev/null 2>&1; then
      # portmapper's still running. stop it.

      if [ -x /bin/fuser ]; then
        PID=$(/bin/fuser -n tcp sunrpc | sed 's/^.*: *//')
      fi

      if [ "$PID" ]; then
        if [ ! -f /var/run/portmap.upgrade-state ]; then
          echo >&2 "Remembering old rpc services... "
          pmap_dump >/var/run/portmap.upgrade-state
          echo >&2 "done."
        fi
        echo >&2 -n "Killing portmapper... "
        kill $PID
        echo >&2 "done."
      fi
    fi
  fi
}

update_hosts_file() {
  if [ -f /etc/hosts ] && ! grep -q "ip6-localhost" /etc/hosts; then
    cat >>/etc/hosts <<-EOF

    # The following lines are desirable for IPv6 capable hosts
    # (added automatically by netbase upgrade)

    ::1     ip6-localhost ip6-loopback
    fe00::0 ip6-localnet
    ff00::0 ip6-mcastprefix
    ff02::1 ip6-allnodes
    ff02::2 ip6-allrouters
    ff02::3 ip6-allhosts
EOF
  fi
}

update_initd_networks() {
  if [ "$2" ] && dpkg --compare-versions "$2" lt "3.17-1"; then
    if [ -e /etc/init.d/network ]; then
      cat >> /etc/init.d/network <<EOF

# (added automatically by netbase upgrade)
#
# In new Debian installations, this file is deprecated in favour of
# the ifup/ifdown commands (invoked from /etc/init.d/networking), which
# can be configured from the file /etc/network/interfaces.
#
# If you are receiving SIOCADDRT errors, they can be avoided by adding
# a netmask and interface to your "route add -net" lines. eg,
#      route add -net 127.0.0.0
# becomes:
#      route add -net 127.0.0.0 netmask 255.0.0.0 lo
#
# Alternatively, these lines can simply be deleted if you don't use 2.0.x
# series kernels.
EOF
    fi
  fi
}

fix_old_initscript() {
  if [ -e /etc/init.d/netbase ]; then
    mv /etc/init.d/netbase /etc/init.d/netbase.old
  fi

  if [ "$2" ] && dpkg --compare-versions "$2" lt "3.18-1"; then
    # only do this for people who were running unstable
    if dpkg --compare-versions "$2" ge "3.16-1"; then
      echo >&2 "BUGFIX: Resetting runlevels at which /etc/init.d/networking is run."
      update-rc.d -f networking remove > /dev/null 2>&1
    fi

    update-rc.d -f netbase remove > /dev/null 2>&1
  fi
  if [ "$2" ] && dpkg --compare-versions "$2" lt "4.24ubuntu2"; then
    update-rc.d -f networking remove > /dev/null 2>&1
  fi

  # Remove shutdown and reboot links; this init script does not need them.
  if dpkg --compare-versions "$2" lt "4.25ubuntu2"; then
    rm -f /etc/rc0.d/S35networking /etc/rc6.d/S35networking
  fi
}

update_rc() {
  update-rc.d networking start 40 S . > /dev/null
}

case "$1" in
    configure)
    migrate_options_file "$@"
    #remove_options_file "$@"
    remove_old_files
    kill_portmapper "$@"
    update_hosts_file
    update_initd_networks "$@"
    fix_old_initscript "$@"
    update_rc
    ;;

    abort-upgrade|abort-remove|abort-deconfigure)
    ;;

    *)
    echo "postinst called with unknown argument '$1'" >&2
    exit 1
    ;;
esac



# shouldn't be necessary? but without it the postinst just hangs on dpkg -i :(
#
# do i have to do this right at the end, or can i do it earlier, for that
# matter?
#
# i may be meant to redirect 3>&1 or something equally weird here :-/
# maybe this isn't necessary anymore (since there shouldn't be any daemons
# in this postinst anymore), but who knows?
#
if [ "$1" = "configure" ]; then
    db_stop
fi