package/eudev: support configuration via /etc/default/udevd

Take the arguments for the daemon and the "udevadm settle" command
from variables and support defining them in /etc/default/udevd.

Signed-off-by: Simon Rowe <simon.rowe@nutanix.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/eudev/S10udev

@@ -16,6 +16,14 @@
 #	/dev/zero, /dev/null -- that's needed to boot and run this script.
 #
 
+DAEMON="udevd"
+
+SETTLE_TIMEOUT=30
+UDEVD_ARGS="-d"
+
+# shellcheck source=/dev/null
+[ -r "/etc/default/$DAEMON" ] && . "/etc/default/$DAEMON"
+
 # Check for config file and read it
 UDEV_CONFIG=/etc/udev/udev.conf
 test -r $UDEV_CONFIG || exit 6
@@ -25,10 +33,10 @@ case "$1" in
     start)
         printf "Populating %s using udev: " "${udev_root:-/dev}"
         [ -e /proc/sys/kernel/hotplug ] && printf '\000\000\000\000' > /proc/sys/kernel/hotplug
-        /sbin/udevd -d || { echo "FAIL"; exit 1; }
+        /sbin/udevd $UDEVD_ARGS || { echo "FAIL"; exit 1; }
         udevadm trigger --type=subsystems --action=add
         udevadm trigger --type=devices --action=add
-        udevadm settle --timeout=30 || echo "udevadm settle failed"
+        udevadm settle --timeout=$SETTLE_TIMEOUT || echo "udevadm settle failed"
         echo "done"
         ;;
     stop)