#!/sbin/runscript
# Copyright 1999-2013 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2

description="mount devtmpfs on /dev"

depend()
{
	provide dev-mount
	keyword -vserver -lxc
}

mount_dev_directory()
{
	local mounted=false fstab=false action=--mount msg=Mounting rc=0

	if ! grep -qs devtmpfs /proc/filesystems; then
		eerror "CONFIG_DEVTMPFS=y is required in your kernel configuration"
		eerror "for this version of udev to run successfully."
		eerror "This requires immediate attention."
		if ! mountinfo -q /dev; then
			mount -n -t tmpfs dev /dev
			busybox mdev -s
			mkdir /dev/pts
		fi
		return 1
	fi

	# Is /dev already a mounted devtmpfs?
	mountinfo -q -f devtmpfs /dev && mounted=true

	# If an entry for /dev exists in fstab it must be a devtmpfs.
	fstabinfo -q -t devtmpfs /dev && fstab=true

	# No options are processed here as they should all be in /etc/fstab
	if $fstab; then
		$mounted && action=--remount && msg=Remounting
		ebegin "$msg /dev according to /etc/fstab"
		fstabinfo $action /dev
		rc=$?
	elif ! $mounted; then
		ebegin "Mounting /dev"
		# Some devices require exec, Bug #92921
		mount -n -t devtmpfs -o "exec,nosuid,mode=0755,size=10M" udev /dev
		rc=$?
	else
		ebegin "Using /dev mounted from kernel"
	fi

	eend $rc
}

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

	# creating /dev/console, /dev/tty and /dev/tty1 to be able to write
	# to $CONSOLE with/without bootsplash before udevd creates it
	[ -c /dev/console ] || mknod -m 600 /dev/console c 5 1
	[ -c /dev/tty1 ] || mknod -m 620 /dev/tty1 c 4 1
	[ -c /dev/tty ] || mknod -m 666 /dev/tty c 5 0

	# 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 -m 666 /dev/null c 1 3

	# so udev can add its start-message to dmesg
	[ -c /dev/kmsg ] || mknod -m 660 /dev/kmsg c 1 11

	# Create problematic directories
	mkdir -p /dev/pts /dev/shm
	return 0
}

start()
{
	mount_dev_directory || return 1

	seed_dev
	return 0
}
