eudev: Replaces udev with eudev for compatibility when using sysvinit on newer kernels

udev has started to fail on new kernels (4.4), due to being deprecated in favor
of systemd's udev implementation. To maintain a sysvinit alternative we also
need to provide an alternative to udev. Eudev is a fork of systemds udev,
this new eudev recipe provides upstream udev 220 funcitonality.

  - Removes patches that dont apply anymore
  - ToDo: eudev-ptest?

[YOCTO #8998]

Signed-off-by: Alejandro Hernandez <alejandro.hernandez@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 75 insertions, 0 deletions

diff --git a/meta/recipes-core/udev/eudev/udev-cache b/meta/recipes-core/udev/eudev/udev-cache
new file mode 100644
index 0000000000..dcfff1cb45
--- /dev/null
+++ b/meta/recipes-core/udev/eudev/udev-cache
@@ -0,0 +1,75 @@
+#!/bin/sh -e
+
+### BEGIN INIT INFO
+# Provides:          udev-cache
+# Required-Start:    mountall
+# Required-Stop:
+# Default-Start:     S
+# Default-Stop:
+# Short-Description: cache /dev to speedup the udev next boot
+### END INIT INFO
+
+export TZ=/etc/localtime
+
+[ -r /proc/mounts ] || exit 1
+[ -x @UDEVD@ ] || exit 1
+[ -d /sys/class ] || exit 1
+
+[ -f /etc/default/rcS ] && . /etc/default/rcS
+DEVCACHE_TMP="/dev/shm/udev-cache-tmp.tar"
+SYSCONF_CACHED="/etc/udev/cache.data"
+SYSCONF_TMP="/dev/shm/udev.cache"
+DEVCACHE_REGEN="/dev/shm/udev-regen" # create to request cache regen
+
+# A list of files which are used as a criteria to judge whether the udev cache could be reused.
+CMP_FILE_LIST="/proc/version /proc/cmdline /proc/devices"
+[ -f /proc/atags ] && CMP_FILE_LIST="$CMP_FILE_LIST /proc/atags"
+
+# List of files whose metadata (size/mtime/name) will be included in cached
+# system state.
+META_FILE_LIST="lib/udev/rules.d/* etc/udev/rules.d/*"
+
+# Command to compute system configuration.
+sysconf_cmd () {
+	cat -- $CMP_FILE_LIST
+	stat -c '%s %Y %n' -- $META_FILE_LIST | awk -F/ '{print $1 " " $NF;}'
+}
+
+[ -f /etc/default/udev-cache ] && . /etc/default/udev-cache
+
+if [ "$ROOTFS_READ_ONLY" = "yes" ]; then
+    [ "$VERBOSE" != "no" ] && echo "udev-cache: read-only rootfs, skip generating udev-cache"
+    exit 0
+fi
+
+[ "$DEVCACHE" != "" ] || exit 0
+[ "${VERBOSE}" == "no" ] || echo -n "udev-cache: checking for ${DEVCACHE_REGEN}... "
+if ! [ -e "$DEVCACHE_REGEN" ]; then
+	[ "${VERBOSE}" == "no" ] || echo "not found."
+	exit 0
+fi
+[ "${VERBOSE}" == "no" ] || echo "found."
+echo "Populating dev cache"
+
+err_cleanup () {
+        echo "udev-cache: update failed!"
+        udevadm control --start-exec-queue
+	rm -f -- "$SYSCONF_TMP" "$DEVCACHE_TMP" "$DEVCACHE" "$SYSCONF_CACHED"
+}
+
+(
+	set -e
+	trap 'err_cleanup' EXIT
+	udevadm control --stop-exec-queue
+	sysconf_cmd > "$SYSCONF_TMP"
+	find /dev -xdev \( -type b -o -type c -o -type l \) | cut -c 2- \
+		| xargs tar cf "${DEVCACHE_TMP}"
+	gzip < "${DEVCACHE_TMP}" > "$DEVCACHE"
+	rm -f "${DEVCACHE_TMP}"
+	mv "$SYSCONF_TMP" "$SYSCONF_CACHED"
+	udevadm control --start-exec-queue
+	rm -f "$DEVCACHE_REGEN"
+	trap - EXIT
+) &
+
+exit 0