1 files changed, 212 insertions, 0 deletions

diff --git a/meta/recipes-core/udev/files/init b/meta/recipes-core/udev/files/init
new file mode 100755
index 0000000000..8cbab188f0
--- /dev/null
+++ b/meta/recipes-core/udev/files/init
@@ -0,0 +1,212 @@
+#!/bin/sh -e
+
+UDEVSTART=/sbin/udevstart
+
+# defaults
+tmpfs_size="10M"
+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