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-rwxr-xr-xrecipes/udev/files/init212
1 files changed, 212 insertions, 0 deletions
diff --git a/recipes/udev/files/init b/recipes/udev/files/init
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@@ -0,0 +1,212 @@
+#!/bin/sh
+
+UDEVSTART=/sbin/udevstart
+
+# defaults
+tmpfs_size="2M"
+udev_root="/dev"
+
+[ -x $UDEVSTART ] || exit 0
+
+. /etc/udev/udev.conf
+
+##############################################################################
+
+# we need to unmount /dev/pts/ and remount it later over the tmpfs
+unmount_devpts() {
+ if mountpoint -q /dev/pts/; then
+ umount -l /dev/pts/
+ fi
+
+ if mountpoint -q /dev/shm/; then
+ umount -l /dev/shm/
+ fi
+}
+
+# mount a tmpfs over /dev, if somebody did not already do it
+mount_tmpfs() {
+ if grep -E -q "^[^[:space:]]+ /dev tmpfs" /proc/mounts; then
+ return 0
+ fi
+
+ # /dev/.static/dev/ is used by MAKEDEV to access the real /dev/ directory.
+ # /etc/udev/ is recycled as a temporary mount point because it's the only
+ # directory which is guaranteed to be available.
+ mount -n -o bind /dev /etc/udev
+
+ if ! mount -n -o size=$tmpfs_size,mode=0755 -t tmpfs tmpfs /dev; then
+ umount /etc/udev
+ echo "udev requires tmpfs support, not started."
+ exit 1
+ fi
+
+ # using ln to test if /dev works, because touch is in /usr/bin/
+ if ln -s test /dev/test-file; then
+ rm /dev/test-file
+ else
+ echo "udev requires tmpfs support, not started."
+ umount /etc/udev
+ umount /dev
+ 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
+}
+
+# I hate this hack. -- Md
+make_extra_nodes() {
+ [ -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 $arg1)" ;;
+ esac
+ done
+}
+
+# this function is duplicated in preinst, postinst and d-i
+supported_kernel() {
+ case "$(uname -r)" in
+ 2.[012345].*|2.6.[0-9]|2.6.[0-9][!0-9]*) return 1 ;;
+ 2.6.1[01]|2.6.1[01][!0-9]*) return 1 ;;
+ esac
+ return 0
+}
+
+# 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 0
+ fi
+
+ TTY=$(my_tty)
+ if [ -z "$TTY" -o "$TTY" = "/dev/console" ]; then
+ return 0
+ fi
+
+ printf "\n\n\nIt has been detected that the command\n\n\t$0 $*\n\n"
+ printf "has been run from an interactive shell.\n"
+ printf "It will probably not do what you expect, so this script will wait\n"
+ printf "60 seconds before continuing. Press ^C to stop it.\n"
+ printf "RUNNING THIS COMMAND IS HIGHLY DISCOURAGED!\n\n\n\n"
+ sleep 60
+}
+
+##############################################################################
+
+if ! supported_kernel; then
+ echo "udev requires a kernel >= 2.6.12, not started."
+ exit 1
+fi
+
+if [ ! -e /proc/filesystems ]; then
+ echo "udev requires a mounted procfs, not started."
+ exit 1
+fi
+
+if ! grep -q '[[:space:]]tmpfs$' /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 ] && [ ! -e /sys/kernel/uevent_helper ]; 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 udevstart 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/.udevdb" ]; then
+ if mountpoint -q /dev/; then
+ TMPFS_MOUNTED=1
+ else
+ echo ".udevdb already exists on the old $udev_root!"
+ fi
+ fi
+ warn_if_interactive
+
+ #echo /sbin/udevsend > /proc/sys/kernel/hotplug
+ if [ -e /sys/kernel/uevent_helper ] ; then
+ echo "" > /sys/kernel/uevent_helper
+ else
+ echo "" > /proc/sys/kernel/hotplug
+ fi
+ udevsend
+ if [ "$UDEV_DISABLED" = "yes" ]; then
+ echo "udev disabled on the kernel command line, not started."
+ exit 0
+ fi
+
+ if [ ! "$TMPFS_MOUNTED" ]; then
+ unmount_devpts
+ mount_tmpfs
+ [ -d /proc/1 ] || mount -n /proc
+ # if this directory is not present /dev will not be updated by udev
+ mkdir /dev/.udevdb/
+ echo "Creating initial device nodes..."
+ udevstart
+ fi
+ make_extra_nodes
+ ;;
+ stop)
+ warn_if_interactive
+ start-stop-daemon --stop --exec /sbin/udevd --quiet
+ unmount_devpts
+ if [ -d /dev/.static/dev/ ]; then
+ umount -l /dev/.static/dev/ || true
+ fi
+ echo "Unmounting /dev..."
+ # unmounting with -l should never fail
+ if ! umount -l /dev; then
+ exit 1
+ fi
+ ;;
+ restart|force-reload)
+ start-stop-daemon --stop --exec /sbin/udevd --quiet
+ log_begin_msg "Recreating device nodes..."
+ udevstart
+ make_extra_nodes
+ log_end_msg 0
+ ;;
+ *)
+ echo "Usage: /etc/init.d/udev {start|stop|restart|force-reload}"
+ exit 1
+ ;;
+esac
+
+exit 0