mdev.initd

mdev.initd (text/plain), 1.83 KB, created by William Hubbs on 2014-10-30 21:57:27 UTC

#!/sbin/runscript
# Copyright 1999-2012 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
# $Header: /var/cvsroot/gentoo-x86/sys-apps/busybox/files/mdev.rc.1,v 1.2 2012/09/26 21:25:23 robbat2 Exp $

depend()
{
	provide dev
	need dev-mount sysfs
}

find_mdev()
{
	if [ -x /sbin/mdev ] ; then
		echo "/sbin/mdev"
	else
		echo "/bin/busybox mdev"
	fi
}

populate_mdev()
{
	# populate /dev with devices already found by the kernel

	if get_bootparam "nocoldplug" ; then
		RC_COLDPLUG="no"
		ewarn "Skipping mdev coldplug as requested in kernel cmdline"
	fi

	ebegin "Populating /dev with existing devices with mdev -s"
	$(find_mdev) -s
	eend $?

	return 0
}

seed_dev()
{
	# Seed /dev with some things that we know we need

	# creating /dev/console and /dev/tty1 to be able to write
	# to $CONSOLE with/without bootsplash before mdev creates it
	[ -c /dev/console ] || mknod /dev/console c 5 1
	[ -c /dev/tty1 ] || mknod /dev/tty1 c 4 1

	# udevd will dup its stdin/stdout/stderr to /dev/null
	# and we do not want a file which gets buffered in ram
	[ -c /dev/null ] || mknod /dev/null c 1 3

	# copy over any persistant things
	if [ -d /lib/mdev/devices ] ; then
		cp -RPp /lib/mdev/devices/* /dev 2>/dev/null
	fi

	# Not provided by sysfs but needed
	ln -snf /proc/self/fd /dev/fd
	ln -snf fd/0 /dev/stdin
	ln -snf fd/1 /dev/stdout
	ln -snf fd/2 /dev/stderr
	[ -e /proc/kcore ] && ln -snf /proc/kcore /dev/core

}

start()
{
	if mountinfo -q -f '^devtmpfs$' /dev; then
		eerror "Using devtmpfs is not compatible with mdev."
		eerror "Please reconfigure your /dev directory by using"
		eerror "static /dev or tmpfs."
		return 1
	fi

	seed_dev

	# Setup hotplugging (if possible)
	if [ -e /proc/sys/kernel/hotplug ] ; then
		ebegin "Setting up mdev as hotplug agent"
		echo $(find_mdev) > /proc/sys/kernel/hotplug
		eend 0
	fi

	populate_mdev
}