1 files changed, 88 insertions, 0 deletions
diff --git a/debian/udev.postinst b/debian/udev.postinst
new file mode 100644
index 0000000..4206321
--- /dev/null
+++ b/debian/udev.postinst
@@ -0,0 +1,88 @@
+#!/bin/sh
+
+set -e
+
+chrooted() {
+  if [ "$(stat -c %d/%i /)" = "$(stat -Lc %d/%i /proc/1/root 2>/dev/null)" ];
+  then
+    # the devicenumber/inode pair of / is the same as that of /sbin/init's
+    # root, so we're *not* in a chroot and hence return false.
+    return 1
+  fi
+  echo "A chroot environment has been detected, udev not started."
+  return 0
+}
+
+in_debootstrap() {
+  # debootstrap --second-stage may be run in an emulator instead of a chroot,
+  # we need to check for this special case because start-stop-daemon would
+  # not be available. (#520742)
+  if [ -d /debootstrap/ ]; then
+    echo "Being installed by debootstrap, udev not started."
+    return 0
+  fi
+  return 1
+}
+
+can_start_udevd() {
+  if [ ! -d /sys/class/ ]; then
+    echo "udev requires a mounted sysfs, not started."
+    return 1
+  fi
+  return 0
+}
+
+enable_udev() {
+  can_start_udevd || return 0
+  invoke-rc.d udev start
+}
+
+upgrade_fixes() {
+  # new Default-Stop (see #791944)
+  if dpkg --compare-versions "$2" lt-nl "239-8"; then
+    update-rc.d -f udev remove
+  fi
+}
+
+update_hwdb() {
+  systemd-hwdb --usr update || true
+}
+
+case "$1" in
+    configure)
+    # update/create hwdb before we (re)start udev
+    update_hwdb
+
+    # Add new system group used by udev rules
+    addgroup --quiet --system input
+
+    # Make /dev/kvm accessible to kvm group
+    addgroup --quiet --system kvm
+
+    # Make /dev/dri/renderD* accessible to render group
+    addgroup --quiet --system render
+
+    if [ -z "$2" ]; then # first install
+      if ! chrooted && ! in_debootstrap; then
+	enable_udev
+      fi
+    else # upgrades
+      upgrade_fixes "$@"
+      if ! chrooted; then
+	if can_start_udevd; then
+	  if [ -d /run/systemd/system ] ; then
+	    systemctl daemon-reload || true
+	  fi
+	  invoke-rc.d udev restart
+	fi
+      fi
+    fi
+    ;;
+
+    triggered)
+    update_hwdb
+    exit 0
+    ;;
+esac
+
+#DEBHELPER#