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#!/bin/sh
#
# udev This is a minimal non-LSB version of a UDEV startup script. It
# was derived by stripping down the udev-058 LSB version for use
# with buildroot on embedded hardware using Linux 2.6.12+ kernels.
#
# You may need to customize this for your system's resource limits
# (including startup time!) and administration. For example, if
# your early userspace has a custom initramfs or initrd you might
# need /dev much earlier; or without hotpluggable busses (like USB,
# PCMCIA, MMC/SD, and so on) your /dev might be static after boot.
#
# This script assumes your system boots right into the eventual root
# filesystem, and that init runs this udev script before any programs
# needing more device nodes than the bare-bones set -- /dev/console,
# /dev/zero, /dev/null -- that's needed to boot and run this script.
#
# old kernels don't use udev
case $(uname -r) in
2.6*|2.7*) ;;
*) exit 0;;
esac
# Check for missing binaries
UDEV_BIN=/sbin/udevd
test -x $UDEV_BIN || exit 5
UDEVSTART_BIN=/sbin/udevstart
test -x $UDEVSTART_BIN || exit 5
# Check for config file and read it
UDEV_CONFIG=/etc/udev/udev.conf
test -r $UDEV_CONFIG || exit 6
. $UDEV_CONFIG
# Directory where sysfs is mounted
SYSFS_DIR=/sys
case "$1" in
start)
# mount sysfs if it's not yet mounted
if [ ! -d $SYSFS_DIR ]; then
echo "${0}: SYSFS_DIR \"$SYSFS_DIR\" not found"
exit 1
fi
grep -q "^sysfs $SYSFS_DIR" /proc/mounts ||
mount -t sysfs /sys /sys ||
exit 1
# mount $udev_root as ramfs if it's not yet mounted
# we know 2.6 kernels always support ramfs
if [ ! -d $udev_root ]; then
echo "${0}: udev_root \"$udev_root\" not found"
exit 1
fi
grep -q "^udev $udev_root" /proc/mounts ||
mount -t ramfs udev $udev_root ||
exit 1
mkdir $udev_root/pts $udev_root/shm
# populate /dev (normally)
echo -n "Populating $udev_root using udev: "
echo -e '\000\000\000\000' > /proc/sys/kernel/hotplug
$UDEV_BIN -d || (echo "FAIL" && exit 1)
$UDEVSTART_BIN || (echo "FAIL" && exit 1)
mount -t devpts /dev/pts /dev/pts || (echo "FAIL" && exit 1)
echo "done"
;;
stop)
# Stop execution of events
udevcontrol stop_exec_queue
killall udevd
;;
*)
echo "Usage: $0 {start|stop}"
exit 1
;;
esac
exit 0
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