- #!/bin/sh -e
- ### BEGIN INIT INFO
- # Provides: udev
- # Required-Start: mountkernfs
- # Required-Stop:
- # Default-Start: S
- # Default-Stop:
- # Short-Description: Start udevd, populate /dev and load drivers.
- ### END INIT INFO
- # we need to unmount /dev/pts/ and remount it later over the tmpfs
- unmount_devpts() {
- if mountpoint -q /dev/pts/; then
- umount -n -l /dev/pts/
- fi
- if mountpoint -q /dev/shm/; then
- umount -n -l /dev/shm/
- fi
- }
- # mount a tmpfs over /dev, if somebody did not already do it
- mount_tmpfs() {
- if grep -E -q "^[^[:space:]]+ /dev tmpfs" /proc/mounts; then
- return
- fi
- # /dev/.static/dev/ is used by MAKEDEV to access the real /dev/ directory.
- # /lib/udev/devices/ is recycled as a temporary mount point.
- if [ -z "$no_static_dev" ]; then
- mount -n --bind /dev /lib/udev/devices
- fi
- if ! mount -n -o size=$tmpfs_size,mode=0755 -t tmpfs tmpfs /dev; then
- if [ -z "$no_static_dev" ]; then
- umount -n /lib/udev/devices
- fi
- log_failure_msg "udev requires tmpfs support, not started."
- log_end_msg 1
- fi
- # relabel the new tmpfs accordingly
- [ -x /sbin/restorecon ] && /sbin/restorecon /dev
- if [ -z "$no_static_dev" ]; then
- mkdir -p /dev/.static/dev
- chmod 700 /dev/.static/
- mount -n --move /lib/udev/devices /dev/.static/dev
- fi
- }
- create_dev_makedev() {
- if [ -e /sbin/MAKEDEV ]; then
- ln -sf /sbin/MAKEDEV /dev/MAKEDEV
- else
- ln -sf /bin/true /dev/MAKEDEV
- fi
- }
- # I hate this hack. -- Md
- make_extra_nodes() {
- if [ "$(echo /lib/udev/devices/*)" != "/lib/udev/devices/*" ]; then
- cp --archive --update /lib/udev/devices/* /dev/
- fi
- [ -e /etc/udev/links.conf ] || return 0
- grep '^[^#]' /etc/udev/links.conf | \
- while read type name arg1; do
- [ "$type" -a "$name" -a ! -e "/dev/$name" -a ! -L "/dev/$name" ] ||continue
- case "$type" in
- L) ln -s $arg1 /dev/$name ;;
- D) mkdir -p /dev/$name ;;
- M) mknod -m 600 /dev/$name $arg1 ;;
- *) log_warning_msg "links.conf: unparseable line ($type $name $arg1)" ;;
- esac
- if [ -x /sbin/restorecon ]; then
- /sbin/restorecon /dev/$name
- fi
- done
- }
- supported_kernel() {
- case "$(uname -r)" in
- 2.[012345].*|2.6.[0-9]|2.6.[0-9][!0-9]*) return 1 ;;
- 2.6.1[0-4]|2.6.1[0-4][!0-9]*) return 1 ;;
- esac
- return 0
- }
- load_input_modules() {
- case "$(uname -r)" in
- 2.6.1[0-5]|2.6.1[0-5][!0-9]*) ;; # <= 2.6.15
- *) return 0
- esac
- for module in mousedev evdev joydev; do
- modprobe -q $module || true
- done
- }
- # shell version of /usr/bin/tty
- my_tty() {
- [ -x /bin/readlink ] || return 0
- [ -e /proc/self/fd/0 ] || return 0
- readlink --silent /proc/self/fd/0 || true
- }
- warn_if_interactive() {
- if [ "$RUNLEVEL" = "S" -a "$PREVLEVEL" = "N" ]; then
- return
- fi
- TTY=$(my_tty)
- if [ -z "$TTY" -o "$TTY" = "/dev/console" -o "$TTY" = "/dev/null" ]; then
- return
- fi
- printf "\n\n\nIt has been detected that the command\n\n\t$0 $*\n\n"
- printf "has been run from an interactive shell.\n"
- printf "It will probably not do what you expect, so this script will wait\n"
- printf "60 seconds before continuing. Press ^C to stop it.\n"
- printf "RUNNING THIS COMMAND IS HIGHLY DISCOURAGED!\n\n\n\n"
- sleep 60
- }
- ##############################################################################
- [ -x /sbin/udevd ] || exit 0
- PATH="/sbin:/bin"
- # defaults
- tmpfs_size="10M"
- udev_root="/dev"
- if [ -e /etc/udev/udev.conf ]; then
- . /etc/udev/udev.conf
- fi
- . /lib/lsb/init-functions
- if ! supported_kernel; then
- log_failure_msg "udev requires a kernel >= 2.6.15, not started."
- log_end_msg 1
- fi
- if [ ! -e /proc/filesystems ]; then
- log_failure_msg "udev requires a mounted procfs, not started."
- log_end_msg 1
- fi
- if ! grep -q '[[:space:]]tmpfs$' /proc/filesystems; then
- log_failure_msg "udev requires tmpfs support, not started."
- log_end_msg 1
- fi
- if [ ! -d /sys/class/ ]; then
- log_failure_msg "udev requires a mounted sysfs, not started."
- log_end_msg 1
- fi
- if [ ! -e /proc/sys/kernel/hotplug ]; then
- log_failure_msg "udev requires hotplug support, not started."
- log_end_msg 1
- fi
- ##############################################################################
- # this is experimental and may not work well
- if [ "$UDEV_DISABLED" = "yes" ]; then
- udev_root=/etc/udev/.dev
- UDEV_ROOT=$udev_root
- fi
- udev_root=${udev_root%/}
- if [ "$udev_root" != "/dev" ]; then
- log_warning_msg "udev_root != /dev/"
- case "$1" in
- start)
- if [ -e "$udev_root/.udev/" ]; then
- if mountpoint -q $udev_root/; then
- log_failure_msg "udev is already active on $udev_root."
- log_end_msg 1
- else
- log_warning_msg ".udev/ already exists on the static $udev_root!"
- fi
- fi
- echo > /proc/sys/kernel/hotplug
- mount -n -o size=$tmpfs_size,mode=0755 -t tmpfs tmpfs $udev_root
- mkdir -p $udev_root/.udev/db/
- log_daemon_msg "Starting the hotplug events dispatcher" "udevd"
- if udevd --daemon; then
- log_end_msg $?
- else
- log_end_msg $?
- fi
- log_action_begin_msg "Synthesizing initial hotplug events"
- if udevtrigger; then
- log_action_end_msg $?
- else
- log_action_end_msg $?
- fi
- load_input_modules
- ;;
- stop)
- log_daemon_msg "Stopping the hotplug events dispatcher" "udevd"
- if start-stop-daemon --stop --name udevd --quiet --oknodo --retry 5; then
- log_end_msg $?
- else
- log_end_msg $?
- fi
- log_action_begin_msg "Unmounting $udev_root"
- # unmounting with -l should never fail
- if umount -n -l $udev_root; then
- log_action_end_msg $?
- else
- log_action_end_msg $?
- fi
- ;;
- restart)
- $0 stop
- $0 start
- ;;
- reload|force-reload)
- udevcontrol reload_rules
- ;;
- *)
- echo "Usage: /etc/init.d/udev {start|stop|restart|reload|force-reload}"
- exit 1
- ;;
- esac
- exit 0
- fi # udev_root != /dev
- ##############################################################################
- # When modifying this script, do not forget that between the time that
- # the new /dev has been mounted and udevtrigger has been run there will be
- # no /dev/null. This also means that you cannot use the "&" shell command.
- case "$1" in
- start)
- if [ -e "$udev_root/.udev/" ]; then
- if mountpoint -q $udev_root/; then
- TMPFS_MOUNTED=1
- else
- log_warning_msg ".udev/ already exists on the static $udev_root!"
- fi
- else
- warn_if_interactive
- fi
- echo > /proc/sys/kernel/hotplug
- if [ -z "$TMPFS_MOUNTED" ]; then
- unmount_devpts
- mount_tmpfs
- [ -d /proc/1 ] || mount -n /proc
- else
- # set the SELinux context for devices created in the initramfs
- [ -x /sbin/restorecon ] && /sbin/restorecon -R /dev
- fi
- # /dev/null must be created before udevd is started
- make_extra_nodes
- # if this directory is not present /dev will not be updated by udev
- mkdir -p /dev/.udev/db/
- log_daemon_msg "Starting the hotplug events dispatcher" "udevd"
- if udevd --daemon; then
- log_end_msg $?
- else
- log_end_msg $?
- fi
- mkdir -p /dev/.udev/queue/
- log_action_begin_msg "Synthesizing the initial hotplug events"
- if udevtrigger; then
- log_action_end_msg $?
- else
- log_action_end_msg $?
- fi
- load_input_modules
- create_dev_makedev
- # wait for the udevd childs to finish
- log_action_begin_msg "Waiting for /dev to be fully populated"
- if udevsettle; then
- log_action_end_msg 0
- else
- log_action_end_msg 0 'timeout'
- fi
- ;;
- stop)
- log_daemon_msg "Stopping the hotplug events dispatcher" "udevd"
- if start-stop-daemon --stop --name udevd --quiet --oknodo --retry 5; then
- log_end_msg $?
- else
- log_end_msg $?
- fi
- ;;
- restart)
- log_daemon_msg "Stopping the hotplug events dispatcher" "udevd"
- if start-stop-daemon --stop --name udevd --quiet --oknodo --retry 5; then
- log_end_msg $?
- else
- log_end_msg $? || true
- fi
- log_daemon_msg "Starting the hotplug events dispatcher" "udevd"
- if udevd --daemon; then
- log_end_msg $?
- else
- log_end_msg $?
- fi
- ;;
- reload|force-reload)
- udevcontrol reload_rules
- ;;
- *)
- echo "Usage: /etc/init.d/udev {start|stop|restart|reload|force-reload}"
- exit 1
- ;;
- esac
- exit 0