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Diffstat (limited to 'recipes/udev/udev-097/init')
| -rw-r--r-- | recipes/udev/udev-097/init | 242 |
1 files changed, 242 insertions, 0 deletions
diff --git a/recipes/udev/udev-097/init b/recipes/udev/udev-097/init new file mode 100644 index 0000000000..ff2ad8ef73 --- /dev/null +++ b/recipes/udev/udev-097/init @@ -0,0 +1,242 @@ +#!/bin/sh +### BEGIN INIT INFO +# Provides: udev +# Required-Start: mountvirtfs +# 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 -l /dev/pts/ + fi + + if mountpoint -q /dev/shm/; then + umount -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. + # /etc/udev/ is recycled as a temporary mount point because it's the only + # directory which is guaranteed to be available. + mount -n -o bind /dev /etc/udev + + if ! mount -n -o size=$tmpfs_size,mode=0755 -t tmpfs tmpfs /dev; then + umount /etc/udev + echo "udev requires tmpfs support, not started." + exit 1 + fi + + mkdir -p /dev/.static/dev + chmod 700 /dev/.static/ + # The mount options in busybox are non-standard... + if test -x /bin/mount.util-linux + then + /bin/mount.util-linux --move /etc/udev /dev/.static/dev + elif test -x /bin/busybox + then + busybox mount -n -o move /etc/udev /dev/.static/dev + else + echo "udev requires an identifiable mount command, not started." + umount /etc/udev + umount /dev + exit 1 + fi +} + +create_dev_makedev() { + if [ -e /sbin/MAKEDEV ]; then + [ ! -e /dev/MAKEDEV ] || ln -s /sbin/MAKEDEV /dev/MAKEDEV + else + ln -s /bin/true /dev/MAKEDEV + fi +} + +# I hate this hack. -- Md +make_extra_nodes() { + if [ "$(echo /lib/udev/devices/*)" != "/lib/udev/devices/*" ]; then + cp -a /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 $arg1 ;; + *) echo "links.conf: unparseable line ($type $name $arg1)" ;; + esac + done +} + +supported_kernel() { + case "$(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" ]; then + return + fi + + printf "\n\n\nIt has been detected that the command\n\n\t$0 $*\n\n" + printf "has been run from an interactive shell.\n" + printf "It will probably not do what you expect, so this script will wait\n" + printf "60 seconds before continuing. Press ^C to stop it.\n" + printf "RUNNING THIS COMMAND IS HIGHLY DISCOURAGED!\n\n\n\n" + sleep 60 +} + +############################################################################## + +[ -x /sbin/udevd ] || exit 0 + +PATH="/sbin:/bin:/usr/bin" + +# defaults +tmpfs_size="2M" +udev_root="/dev" + +if [ -e /etc/udev/udev.conf ]; then + . /etc/udev/udev.conf +fi + +if ! supported_kernel; then + echo "udev requires a kernel >= 2.6.15, not started." + exit 1 +fi + +if [ ! -e /proc/filesystems ]; then + echo "udev requires a mounted procfs, not started." + exit 1 +fi + +if ! grep -q '[[:space:]]tmpfs$' /proc/filesystems; then + echo "udev requires tmpfs support, not started." + exit 1 +fi + +if [ ! -d /sys/class/ ]; then + echo "udev requires a mounted sysfs, not started." + exit 1 +fi + +if [ ! -e /proc/sys/kernel/hotplug ]; then + echo "udev requires hotplug support, not started." + exit 1 +fi + +############################################################################## + +# When modifying this script, do not forget that between the time that +# the new /dev has been mounted and udevsynthesize has been run there will be +# no /dev/null. This also means that you cannot use the "&" shell command. + +udev_root=${udev_root%/} + +case "$1" in + start) + if [ -e "$udev_root/.udev/" ]; then + if mountpoint -q $udev_root/; then + TMPFS_MOUNTED=1 + else + echo ".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 + fi + + # /dev/null must be created before udevd is started + make_extra_nodes + + echo "Starting the hotplug events dispatcher" "udevd" + udevd --daemon + + # if this directory is not present /dev will not be updated by udev + mkdir -p /dev/.udev/db/ /dev/.udev/queue/ + + echo "Synthesizing the initial hotplug events" + udevtrigger + + load_input_modules + create_dev_makedev + + # wait for the udevd childs to finish + echo "Waiting for /dev to be fully populated" + if ! udevsettle; then + echo 'timeout' + fi + ;; + + stop) + echo "Stopping the hotplug events dispatcher" "udevd" + start-stop-daemon --stop --name udevd --quiet + ;; + + restart) + echo "Stopping the hotplug events dispatcher" "udevd" + if start-stop-daemon --stop --name udevd --quiet ; then + exit 1 + fi + + echo "Starting the hotplug events dispatcher" "udevd" + udevd --daemon + ;; + + reload) + udevcontrol reload_rules + ;; + + *) + echo "Usage: /etc/init.d/udev {start|stop|restart|reload}" + exit 1 + ;; +esac + +exit 0 + |