#!/sbin/runscript
# Copyright (c) 2007-2009 Roy Marples <roy@marples.name>
# Released under the 2-clause BSD license.

description="Mounts misc filesystems in /proc."

depend()
{
	use modules devfs
	need localmount
	keyword -openvz -prefix -vserver -lxc
}

start()
{
	# Make sure we insert usbcore if it's a module
	if [ -f /proc/modules -a ! -d /sys/module/usbcore -a ! -d /proc/bus/usb ]; then
		modprobe -q usbcore
	fi

	[ -e /proc/filesystems ] || return 0

	# Setup Kernel Support for miscellaneous Binary Formats
	if [ -d /proc/sys/fs/binfmt_misc -a ! -e /proc/sys/fs/binfmt_misc/register ]; then
		if grep -qs binfmt_misc /proc/filesystems; then
			ebegin "Mounting misc binary format filesystem"
			mount -t binfmt_misc -o nodev,noexec,nosuid \
				binfmt_misc /proc/sys/fs/binfmt_misc
			if eend $? ; then
				local fmts
				ebegin "Loading custom binary format handlers"
				fmts=$(grep -hsv -e '^[#;]' -e '^[[:space:]]*$' \
					/run/binfmt.d/*.conf \
					/etc/binfmt.d/*.conf \
					""/usr/lib/binfmt.d/*.conf)
				if [ -n "${fmts}" ]; then
					echo "${fmts}" > /proc/sys/fs/binfmt_misc/register
				fi
				eend $?
			fi
		fi
	fi

	[ "$RC_SYS" = "OPENVZ" ] && return 0

	# Check what USB fs the kernel support.  Currently
	# 2.5+ kernels, and later 2.4 kernels have 'usbfs',
	# while older kernels have 'usbdevfs'.
	if [ -d /proc/bus/usb -a ! -e /proc/bus/usb/devices ]; then
		local usbfs=$(grep -Fow usbfs /proc/filesystems ||
			grep -Fow usbdevfs /proc/filesystems)
		if [ -n "$usbfs" ]; then
			ebegin "Mounting USB device filesystem [$usbfs]"
			local usbgid="$(getent group usb | \
				sed -e 's/.*:.*:\(.*\):.*/\1/')"
			mount -t $usbfs \
				-o ${usbgid:+devmode=0664,devgid=$usbgid,}noexec,nosuid \
				usbfs /proc/bus/usb
			eend $?
		fi
	fi

	# Setup Kernel Support for SELinux
	if [ -d /selinux ] && ! mountinfo -q /selinux; then
		if grep -qs selinuxfs /proc/filesystems; then
			ebegin "Mounting SELinux filesystem"
			mount -t selinuxfs selinuxfs /selinux
			eend $?
		fi
	fi

	return 0
}
