debian/ifupdown2.postinst

   1 #!/bin/sh
   2 set -e
   3
   4 MYNAME="${0##*/}"
   5
   6 report() { echo "${MYNAME}: $*" ; }
   7 report_warn() { report "Warning: $*" >&2 ; }
   8 report_err() { report "Error: $*" >&2 ; }
   9
  10 fix_dhclient_file_with_space()
  11 {
  12     # because of a typo an older ifupdown2 version was creating lease file
  13     # with trailing space. In case we still have users with such files we
  14     # need to strip that trailing whitespace.
  15     for filename in `find /var/lib/dhcp/ -name "dhclient.*.leases "`
  16     do
  17         if [ -f "$filename " ];
  18         then
  19             interface_name=`echo $filename | cut -d'.' -f2,3,4,5`
  20             mv "$filename " /var/lib/dhcp/dhclient6.$interface_name
  21         fi
  22     done
  23 }
  24
  25 process_etc_network_interfaces()
  26 {
  27     # Generic stuff done on all configurations
  28     if [ -f /etc/network/interfaces ] ; then
  29         if ! grep -q -E "^[[:space:]]*iface[[:space:]]+l[o0]([[:space:]]+inet([[:space:]]+loopback)?)?[[:space:]]*$" /etc/network/interfaces ; then
  30             report_warn "No 'iface lo' definition found in /etc/network/interfaces"
  31         fi
  32
  33         if ! grep -q "^[[:space:]]*\(allow-\|\)auto[[:space:]]\+\(.*[[:space:]]\+\|\)lo0\?\([[:space:]]\+\|$\)" /etc/network/interfaces ; then
  34             report_warn "No 'auto lo' statement found in /etc/network/interfaces"
  35         fi
  36     else  # ! -f /etc/network/interfaces
  37         if [ -z "$2" ]; then
  38             echo "Creating /etc/network/interfaces."
  39             echo "# interfaces(5) file used by ifup(8) and ifdown(8)" > /etc/network/interfaces
  40             echo "auto lo" >> /etc/network/interfaces
  41             echo "iface lo inet loopback" >> /etc/network/interfaces
  42         else
  43             report_warn "/etc/network/interfaces does not exist"
  44         fi
  45     fi
  46 }
  47
  48 process_udev()
  49 {
  50     # override default udev bridge and hotplug rules because they interfere with
  51     # networking init script
  52     udev_user_rulesdir=/etc/udev/rules.d/
  53     udev_sys_rulesdir=/lib/udev/rules.d/
  54     if [ -e $udev_user_rulesdir ]; then
  55         udev_ifupdown2_overrides="80-networking.rules
  56         60-bridge-network-interface.rules"
  57         for u in ${udev_ifupdown2_overrides}
  58         do
  59             if [ -e ${udev_sys_rulesdir}/$u -a ! -e ${udev_user_rulesdir}/$u ]; then
  60                 (cd ${udev_user_rulesdir} && ln -sf /dev/null $u)
  61             fi
  62         done
  63     fi
  64 }
  65
  66 # restore file if we diverted it on install/upgrade
  67 _postinst_remove_diverts()
  68 {
  69     diversions=$(LC_ALL=C.UTF-8 dpkg-divert --list | grep "^diversion of $1 .* by ifupdown2$"  | wc -l 2> /dev/null)
  70     if [ $diversions -gt 0 ];
  71     then
  72         dpkg-divert --remove --package ifupdown2 --rename $1
  73     fi
  74 }
  75
  76 postinst_remove_diverts()
  77 {
  78     for filename in ifup ifdown ifquery ifreload
  79     do
  80         _postinst_remove_diverts "/sbin/$filename"
  81         _postinst_remove_diverts "/usr/share/bash-completion/completions/$filename"
  82         _postinst_remove_diverts "/etc/bash_completion.d/$filename"
  83         _postinst_remove_diverts "/usr/share/man/man8/$filename.8.gz"
  84     done
  85     _postinst_remove_diverts "/usr/share/man/man5/interfaces.5.gz"
  86 }
  87
  88 case "$1" in
  89     configure)
  90         fix_dhclient_file_with_space
  91         process_etc_network_interfaces
  92         process_udev
  93         chmod +x /usr/share/ifupdown2/__main__.py
  94         postinst_remove_diverts
  95     ;;
  96
  97     abort-upgrade|abort-remove|abort-deconfigure)
  98     ;;
  99
 100     *)
 101         echo "postinst called with unknown argument \`$1'" >&2
 102         exit 1
 103     ;;
 104 esac
 105
 106
 107 #DEBHELPER#
 108
 109 exit 0