saving uncommitted changes in /etc prior to emerge run

init.d/procfs

@@ -0,0 +1,73 @@
+#!/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
+}