saving uncommitted changes in /etc prior to emerge run

init.d/hdparm

@@ -0,0 +1,61 @@
+#!/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/hdparm/files/hdparm-init-8,v 1.3 2012/04/29 00:30:18 vapier Exp $
+
+depend() {
+	before bootmisc
+}
+
+do_hdparm() {
+	local e=
+	eval e=\$${extra_args}
+	[ -z "${args}${all_args}${e}" ] && return 0
+	
+	if [ -n "${args:=${all_args} ${e}}" ] ; then
+		local orgdevice=$(readlink -f "${device}")
+		if [ -b "${orgdevice}" ] ; then
+			ebegin "Running hdparm on ${device}"
+			hdparm ${args} "${device}" > /dev/null
+			eend $?
+		fi
+	fi
+}
+
+scan_nondevfs() {
+	# non-devfs compatible system
+	local device
+
+	for device in /dev/hd* /dev/sd* /dev/cdrom* ; do
+		[ -e "${device}" ] || continue
+		case "${device}" in
+			*[0-9]) continue ;;
+			/dev/hd*)  extra_args="pata_all_args" ;;
+			/dev/sd*)  extra_args="sata_all_args" ;;
+			*)         extra_args="_no_xtra_args" ;;
+		esac
+
+		# check that the block device really exists by
+		# opening it for reading
+		local errmsg= status= nomed=1
+		errmsg=$(export LC_ALL=C ; : 2>&1 <"${device}")
+		status=$?
+		case ${errmsg} in
+		    *": No medium found") nomed=0;;
+		esac
+		if [ -b "${device}" ] && [ "${status}" = "0" -o "${nomed}" = "0" ] ; then
+			local conf_var="${device##*/}_args"
+			eval args=\$${conf_var}
+			do_hdparm
+		fi
+	done
+}
+
+start() {
+	if get_bootparam "nohdparm" ; then
+		ewarn "Skipping hdparm init as requested in kernel cmdline"
+		return 0
+	fi
+
+	scan_nondevfs
+}