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|
#!/bin/sh -e
supported_kernel() {
case "$(uname -r)" in
2.[012345].*|2.6.[0-9]|2.6.[0-9][!0-9]*) return 1 ;;
2.6.[12][0-9]|2.6.[12][0-9][!0-9]*) return 1 ;;
2.6.3[0-1]|2.6.3[0-1][!0-9]*) return 1 ;;
esac
return 0
}
tempdir() {
local dir=$(tempfile --prefix=udev.)
rm $dir
mkdir $dir
echo $dir
}
chrooted() {
if [ "$(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 ! supported_kernel; then
echo "udev requires a kernel >= 2.6.32, not started."
return 1
fi
if [ ! -d /sys/class/ ]; then
echo "udev requires a mounted sysfs, not started."
return 1
fi
if ! ps --no-headers --format args ax | egrep -q '^\['; then
echo "udev does not support containers, not started."
return 1
fi
if ! grep -q '[[:space:]]devtmpfs$' /proc/filesystems; then
echo "udev requires devtmpfs support, not started."
return 1
fi
if [ -e /etc/udev/disabled ]; then
echo "/etc/udev/disabled has been detected, udev not started."
return 1
fi
return 0
}
enable_udev() {
can_start_udevd || return 0
invoke-rc.d udev start
# restart some daemons because their /dev sockets might have been hidden by
# the devtmpfs
kill -s HUP 1
local sysloginits="inetutils-syslogd rsyslog socklog-run sysklogd syslog-ng"
for script in $sysloginits; do
[ -x /etc/init.d/$script ] && invoke-rc.d $script restart || true
done
}
update_initramfs() {
[ -x /usr/sbin/update-initramfs -a -e /etc/initramfs-tools/initramfs.conf ] \
|| return 0
update-initramfs -u
}
write_interfaces_rules() {
local devpath
for devpath in /sys/class/net/*; do
[ -d "$devpath" ] || continue
udevadm test --action=add $devpath > /dev/null || true
done
}
upgrade_fixes() {
# 167-1 introduced /run/udev/ but does not move the old database on
# upgrades when it decides to switch to /run/.
if ! chrooted && [ -d /dev/.udev/ -a ! -d /run/udev/ ] \
&& grep -E -q "^[^[:space:]]+ /run tmpfs " /proc/mounts; then
mv /dev/.udev/ /run/udev/
fi
if dpkg --compare-versions "$2" lt "171-3"; then
# in 171-2 this directory becomes a symlink to libudev0, so it must be
# manually deleted because dpkg cannot automatically deal with this
if [ -e /usr/share/doc/udev -a ! -L /usr/share/doc/udev ]; then
rm -rf /usr/share/doc/udev
ln -s libudev0 /usr/share/doc/udev
fi
fi
if dpkg --compare-versions "$2" lt "204-1"; then
# We dropped udev-mtab with udev 204.
update-rc.d udev-mtab remove
fi
}
update_hwdb() {
udevadm hwdb --update --usr || true
}
# In udev-204, we ship systemd-udevd.service (upstream name), whereas previous
# versions used udev.service. We replace udev.service with a symlink to
# systemd-udevd.service, but systemd (both 44 and 204) exposes weird behavior:
# After a daemon-reload, it forgets about the /sbin/udevd process in the
# udev.service cgroup, so a restart will lead to having two udevd processes
# running — one in the udev.service cgroup and one in the systemd-udevd.service
# cgroup.
#
# To fix this, we explicitly stop udev.service and the corresponding sockets,
# then issue the daemon-reload, then restart the new systemd-udevd.service (via
# invoke-rc.d).
handle_service_rename() {
if dpkg --compare-versions "$2" lt "204-1"; then
if [ -d /run/systemd/system ]; then
systemctl stop udev.service udev-control.socket udev-kernel.socket >/dev/null 2>&1 || true
fi
fi
}
case "$1" in
configure)
# update/create hwdb before we (re)start udev
update_hwdb
# Add new system group used by udev rules
addgroup --system input
if [ -z "$2" ]; then # first install
if ! chrooted && ! in_debootstrap; then
write_interfaces_rules
enable_udev
fi
else # upgrades
upgrade_fixes "$@"
if ! chrooted; then
if [ -e /etc/udev/kernel-upgrade ]; then
echo "Kernel upgrade mode, udevd has not been restarted."
echo "Please reboot the system as soon as possible."
rm /etc/udev/kernel-upgrade
elif can_start_udevd; then
handle_service_rename
rm -f /run/systemd/system/systemd-udevd.service
rm -f /run/systemd/system/udev.service
# This is necessary for the handle_service_rename case, but does not
# hurt in general (invoke-rc.d does it, too).
if [ -d /run/systemd/system ] ; then
systemctl daemon-reload || true
fi
invoke-rc.d udev restart
fi
fi
fi
update_initramfs
;;
abort-upgrade|abort-remove|abort-deconfigure)
;;
triggered)
update_hwdb
exit 0
;;
interfaces)
write_interfaces_rules
;;
*)
echo "$0 called with unknown argument '$1'" >&2
exit 1
;;
esac
#DEBHELPER#
|
