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-rw-r--r--recipes-core/udev/eudev/init138
1 files changed, 138 insertions, 0 deletions
diff --git a/recipes-core/udev/eudev/init b/recipes-core/udev/eudev/init
new file mode 100644
index 0000000..d941401
--- /dev/null
+++ b/recipes-core/udev/eudev/init
@@ -0,0 +1,138 @@
+#!/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
+
+export TZ=/etc/localtime
+
+[ -d /sys/class ] || exit 1
+[ -r /proc/mounts ] || exit 1
+[ -x @UDEVD@ ] || exit 1
+[ -f /etc/default/udev-cache ] && . /etc/default/udev-cache
+[ -f /etc/udev/udev.conf ] && . /etc/udev/udev.conf
+[ -f /etc/default/rcS ] && . /etc/default/rcS
+
+readfiles () {
+ READDATA=""
+ for filename in $@; do
+ if [ -r $filename ]; then
+ while read line; do
+ READDATA="$READDATA$line"
+ done < $filename
+ fi
+ done
+}
+
+kill_udevd () {
+ pid=`pidof -x udevd`
+ [ -n "$pid" ] && kill $pid
+}
+
+case "$1" in
+ start)
+ export ACTION=add
+ # propagate /dev from /sys
+ echo "Starting udev"
+
+ # Check for requireed devtmpfs before trying to start udev and
+ # mount a no-existant fs.
+ if ! grep -q devtmpfs /proc/filesystems
+ then
+ echo "Missing devtmpfs, which is required for udev to run";
+ echo "Halting..."
+ halt
+ fi
+ # mount the devtmpfs on /dev, if not already done
+ LANG=C awk '$2 == "/dev" && ($3 == "devtmpfs") { exit 1 }' /proc/mounts && {
+ mount -n -o mode=0755 -t devtmpfs none "/dev"
+ }
+ [ -e /dev/pts ] || mkdir -m 0755 /dev/pts
+ [ -e /dev/shm ] || mkdir -m 1777 /dev/shm
+ # the automount rule for udev needs /tmp directory available, as /tmp is a symlink
+ # to /var/tmp which in turn is a symlink to /var/volatile/tmp, we need to make sure
+ # /var/volatile/tmp directory to be available.
+ mkdir -m 1777 -p /var/volatile/tmp
+
+ # Cache handling.
+ # A list of files which are used as a criteria to judge whether the udev cache could be reused.
+ CMP_FILE_LIST="/proc/version /proc/cmdline /proc/devices /proc/atags"
+ if [ "$DEVCACHE" != "" ]; then
+ if [ -e $DEVCACHE ]; then
+ readfiles $CMP_FILE_LIST
+ NEWDATA="$READDATA"
+ readfiles /etc/udev/cache.data
+ OLDDATA="$READDATA"
+ if [ "$OLDDATA" = "$NEWDATA" ]; then
+ (cd /; tar xf $DEVCACHE > /dev/null 2>&1)
+ not_first_boot=1
+ [ "$VERBOSE" != "no" ] && echo "udev: using cache file $DEVCACHE"
+ [ -e /dev/shm/udev.cache ] && rm -f /dev/shm/udev.cache
+ else
+ # Output detailed reason why the cached /dev is not used
+ if [ "$VERBOSE" != "no" ]; then
+ echo "udev: udev cache not used"
+ echo "udev: we use $CMP_FILE_LIST as criteria to judge whether the cache /dev could be resued"
+ echo "udev: olddata: $OLDDATA"
+ echo "udev: newdata: $NEWDATA"
+ fi
+ echo "$NEWDATA" > /dev/shm/udev.cache
+ fi
+ else
+ if [ "$ROOTFS_READ_ONLY" != "yes" ]; then
+ # If rootfs is not read-only, it's possible that a new udev cache would be generated;
+ # otherwise, we do not bother to read files.
+ readfiles $CMP_FILE_LIST
+ echo "$READDATA" > /dev/shm/udev.cache
+ fi
+ fi
+ fi
+
+ # make_extra_nodes
+ kill_udevd > "/dev/null" 2>&1
+
+ # trigger the sorted events
+ echo -e '\000\000\000\000' > /proc/sys/kernel/hotplug
+ @UDEVD@ -d
+
+ udevadm control --env=STARTUP=1
+ if [ "$not_first_boot" != "" ];then
+ if [ "$PROBE_PLATFORM_BUS" != "yes" ]; then
+ PLATFORM_BUS_NOMATCH="--subsystem-nomatch=platform"
+ else
+ PLATFORM_BUS_NOMATCH=""
+ fi
+ udevadm trigger --action=add --subsystem-nomatch=tty --subsystem-nomatch=mem --subsystem-nomatch=vc --subsystem-nomatch=vtconsole --subsystem-nomatch=misc --subsystem-nomatch=dcon --subsystem-nomatch=pci_bus --subsystem-nomatch=graphics --subsystem-nomatch=backlight --subsystem-nomatch=video4linux $PLATFORM_BUS_NOMATCH
+ (udevadm settle --timeout=10; udevadm control --env=STARTUP=)&
+ else
+ udevadm trigger --action=add
+ udevadm settle
+ fi
+ ;;
+ stop)
+ echo "Stopping udevd"
+ start-stop-daemon --stop --name udevd --quiet
+ ;;
+ restart)
+ $0 stop
+ sleep 1
+ $0 start
+ ;;
+ status)
+ pid=`pidof -x udevd`
+ if [ -n "$pid" ]; then
+ echo "udevd (pid $pid) is running ..."
+ else
+ echo "udevd is stopped"
+ fi
+ ;;
+ *)
+ echo "Usage: $0 {start|stop|status|restart}"
+ exit 1
+esac
+exit 0