diff options
Diffstat (limited to 'debian/udev.postinst')
| -rw-r--r-- | debian/udev.postinst | 139 |
1 files changed, 139 insertions, 0 deletions
diff --git a/debian/udev.postinst b/debian/udev.postinst new file mode 100644 index 0000000..7a78ede --- /dev/null +++ b/debian/udev.postinst @@ -0,0 +1,139 @@ +#!/bin/sh -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 +} + +update_initramfs() { + [ -x /usr/sbin/update-initramfs -a -e /etc/initramfs-tools/initramfs.conf ] \ + || return 0 + update-initramfs -u +} + +upgrade_fixes() { + if dpkg --compare-versions "$2" lt "226-1"; then + update-rc.d udev-finish remove + fi + + # we enabled net.ifnames in 220-7 by default; don't change iface names in + # virtualized envs (where 75-persistent-net-generator.rules didn't work) + if dpkg --compare-versions "$2" lt-nl "220-7~" && + [ ! -e /etc/udev/rules.d/70-persistent-net.rules ] && + [ ! -e /etc/udev/rules.d/80-net-setup-link.rules ] && + [ ! -e /etc/systemd/network/99-default.link ] && + [ ! -L /etc/systemd/network/99-default.link ] && + ! grep -q net.ifnames /proc/cmdline && ! chrooted; then + mkdir -p /etc/systemd/network + cat <<EOF > /etc/systemd/network/99-default.link +# This machine is most likely a virtualized guest, where the old persistent +# network interface mechanism (75-persistent-net-generator.rules) did not work. +# This file disables /lib/systemd/network/99-default.link to avoid +# changing network interface names on upgrade. Please read +# /usr/share/doc/udev/README.Debian.gz about how to migrate to the currently +# supported mechanism. +EOF + fi + + # 226 introduced predictable interface names for virtio + # (https://github.com/systemd/systemd/pull/1119); disable for upgrades + if dpkg --compare-versions "$2" lt-nl "226-2~" && + [ ! -e /etc/systemd/network/50-virtio-kernel-names.link ] && + ls -d /sys/bus/virtio/drivers/virtio_net/virt* >/dev/null 2>&1; then + echo "virtio network devices detected, disabling predictable interface names in /etc/systemd/network/50-virtio-kernel-names.link" + mkdir -p /etc/systemd/network/ + cat <<EOF > /etc/systemd/network/50-virtio-kernel-names.link +# udev 226 introduced predictable interface names for virtio; +# disable this for upgrades. You can remove this file if you update your +# network configuration to move to the ens* names instead. +# See /usr/share/doc/udev/README.Debian.gz for details about predictable +# network interface names. +[Match] +Driver=virtio_net + +[Link] +NamePolicy=onboard kernel +EOF + fi + + # 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 + + update_initramfs + ;; + + triggered) + update_hwdb + exit 0 + ;; +esac + +#DEBHELPER# + |