debian/ifupdown2.postinst

   1 #!/bin/sh
   2 # postinst script for ifupdown2
   3 #
   4 # see: dh_installdeb(1)
   5
   6 set -e
   7
   8 # summary of how this script can be called:
   9 #        * <postinst> `configure' <most-recently-configured-version>
  10 #        * <old-postinst> `abort-upgrade' <new version>
  11 #        * <conflictor's-postinst> `abort-remove' `in-favour' <package>
  12 #          <new-version>
  13 #        * <postinst> `abort-remove'
  14 #        * <deconfigured's-postinst> `abort-deconfigure' `in-favour'
  15 #          <failed-install-package> <version> `removing'
  16 #          <conflicting-package> <version>
  17 # for details, see http://www.debian.org/doc/debian-policy/ or
  18 # the debian-policy package
  19
  20 process_udev()
  21 {
  22     # override default udev bridge and hotplug rules because they interfere with
  23     # networking init script
  24     udev_user_rulesdir=/etc/udev/rules.d/
  25     udev_sys_rulesdir=/lib/udev/rules.d/
  26     if [ -e $udev_user_rulesdir ]; then
  27         udev_ifupdown2_overrides="80-networking.rules
  28         60-bridge-network-interface.rules"
  29         for u in ${udev_ifupdown2_overrides}
  30         do
  31             if [ -e ${udev_sys_rulesdir}/$u -a ! -e ${udev_user_rulesdir}/$u ]; then
  32                 (cd ${udev_user_rulesdir} && ln -sf /dev/null $u)
  33             fi
  34         done
  35     fi
  36 }
  37
  38 MYNAME="${0##*/}"
  39
  40 report() { echo "${MYNAME}: $*" ; }
  41 report_warn() { report "Warning: $*" >&2 ; }
  42 report_err() { report "Error: $*" >&2 ; }
  43
  44 case "$1" in
  45     configure)
  46
  47         # Generic stuff done on all configurations
  48         if [ -f /etc/network/interfaces ] ; then
  49             if ! grep -q "^[[:space:]]*iface[[:space:]]\+lo0\?[[:space:]]\+inet[[:space:]]\+loopback\>" /etc/network/interfaces ; then
  50                 report_warn "No 'iface lo' definition found in /etc/network/interfaces"
  51             fi
  52
  53             if ! grep -q "^[[:space:]]*\(allow-\|\)auto[[:space:]]\+\(.*[[:space:]]\+\|\)lo0\?\([[:space:]]\+\|$\)" /etc/network/interfaces ; then
  54                 report_warn "No 'auto lo' statement found in /etc/network/interfaces"
  55             fi
  56         else  # ! -f /etc/network/interfaces
  57             if [ -z "$2" ]; then
  58                 echo "Creating /etc/network/interfaces."
  59                 echo "# interfaces(5) file used by ifup(8) and ifdown(8)" > /etc/network/interfaces
  60                 echo "auto lo" >> /etc/network/interfaces
  61                     echo "iface lo inet loopback" >> /etc/network/interfaces
  62             else
  63                     report_warn "/etc/network/interfaces does not exist"
  64             fi
  65         fi
  66
  67         process_udev
  68         ;;
  69
  70   purge)
  71     ;;
  72 esac
  73
  74 #DEBHELPER#
  75
  76 exit 0