# HG changeset patch
# User Pascal Bellard <pascal.bellard@slitaz.org>
# Date 1344119229 -7200
# Node ID 593cb33c57e1837b83e688c164d01c51b5eb12be
# Parent  91ed8fa372e33704d772dd4c489eafa2ffd32ea8
linux-source: add rdev

diff -r 91ed8fa372e3 -r 593cb33c57e1 linux-source/receipt
--- a/linux-source/receipt	Sat Aug 04 22:10:01 2012 +0200
+++ b/linux-source/receipt	Sun Aug 05 00:27:09 2012 +0200
@@ -17,11 +17,15 @@
 	local AUFSDIR="aufs-${_AUFSVER}"
 	mkdir -p $fs/usr/src/kernel-patches \
 			$fs/lib/modules/$BASEVER-slitaz \
-			$fs/usr/bin
+			$fs/usr/bin $fs/usr/sbin
 	cp -a $WOK/$WANTED/source/slitaz $fs/usr/src/kernel-patches
 	cp -a $stuff/buildtaz $fs/usr/src/kernel-patches/slitaz
 	cp -a $stuff/make-tazpkg.u $fs/usr/src/kernel-patches/slitaz
 	cp -a $stuff/get-linux-source $fs/usr/bin
+	cp -a $stuff/rdev $fs/usr/sbin
+	ln -s rdev $fs/usr/sbin/rootflags
+	ln -s rdev $fs/usr/sbin/ramsize
+	ln -s rdev $fs/usr/sbin/vidmode
 	sed -i "s|=XXX|=$VERSION|g" $fs/usr/bin/get-linux-source
 	# Copy Aufs2 source files
 	if [ -d $WOK/$WANTED/$AUFSDIR ]; then
diff -r 91ed8fa372e3 -r 593cb33c57e1 linux-source/stuff/rdev
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/linux-source/stuff/rdev	Sun Aug 05 00:27:09 2012 +0200
@@ -0,0 +1,43 @@
+#!/bin/sh
+
+sw=""
+case "$(basename $0)" in
+rootflags)	sw="-R" ;;
+ramsize)	sw="-r" ;;
+vidmode)	sw="-v" ;;
+esac
+[ -n "$sw" ] && set -- $sw "$@"
+
+offset=508
+image=
+value=
+format="Root device 0x%X"
+while [ -n "$1" ]; do
+	case "$1" in	
+	-R)	offset=498; format="Root flags %d";;
+	-r)	offset=504; format="Ramsize %d";;
+	-v)	offset=506; format="Video mode%d";;
+	-o)	offset=$(($2)); shift ;;
+	*)	if [ -z "$image" ]; then
+			image="$1"
+		elif [ -z "$value" ]; then
+			value="$1"
+		else
+			offset=$(($1))
+		fi
+	esac
+	shift
+done
+
+if [ ! -s "$image" ]; then
+	printf "0x%04X /\n" $(cat /proc/sys/kernel/real-root-dev)
+elif [ -n "$value" ]; then
+	for i in 1 2; do
+		printf '\\\\x%02X' $(($value & 255))
+		value=$(($value >> 8))
+	done | xargs echo -en | \
+	dd bs=1 conv=notrunc of=$image seek=$offset 2> /dev/null
+else
+	dd bs=1 conv=notrunc if=$image skip=$offset count=2 2> /dev/null | \
+	hexdump -e '"" 1/2 "$format" "\n"'
+fi