#!/sbin/runscript
# Copyright 2007 Roy Marples
# All rights reserved

# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# 1. Redistributions of source code must retain the above copyright
#    notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
#    notice, this list of conditions and the following disclaimer in the
#    documentation and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
# SUCH DAMAGE.

description="Mounts misc filesystems in /proc."

depend() {
	need checkfs
}

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

	[ -e /proc/filesystems ] || 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 the NFS daemon status
	if [ -d /proc/fs/nfsd ] && ! mountinfo -q /proc/fs/nfsd; then
		if grep -qs nfsd /proc/filesystems; then
			ebegin "Mounting nfsd filesystem"
			mount -t nfsd -o nodev,noexec,nosuid \
				nfsd /proc/fs/nfsd
			eend $?
		fi
	fi

	# Setup Kernel Support for miscellaneous Binary Formats
	if [ -d /proc/sys/fs/binfmt_misc ] && ! mountinfo -q /proc/sys/fs/binfmt_misc; 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
			eend $?
		fi
	fi

	# Setup Kernel Support for securityfs
	if [ -d /sys/kernel/security ] && ! mountinfo -q /sys/kernel/security; then
		if grep -qs securityfs /proc/filesystems; then
			ebegin "Mounting security filesystem"
			mount -t securityfs -o nodev,noexec,nosuid \
				securityfs /sys/kernel/security
			eend $?
		fi
	fi

	# Setup Kernel Support for debugfs
	if [ -d /sys/kernel/debug ] && ! mountinfo -q /sys/kernel/debug; then
		if grep -qs debugfs /proc/filesystems; then
			ebegin "Mounting debug filesystem"
			mount -t debugfs -o nodev,noexec,nosuid \
				debugfs /sys/kernel/debug
			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
}

# vim: set ts=4 :