enable cfgfs for rb532

- choose backend at runtime
- do not hardcode partition device anymore

package/cfgfs/Config.in

@@ -4,7 +4,8 @@ config ADK_PACKAGE_CFGFS
 	select BUSYBOX_COMM
 	select BUSYBOX_MD5SUM
 	select BUSYBOX_FEATURE_SORT_BIG
-	depends on ADK_LINUX_X86_ALIX1C || ADK_LINUX_CRIS_FOXBOARD
+	depends on ADK_LINUX_X86_ALIX1C || ADK_LINUX_CRIS_FOXBOARD || \
+		ADK_LINUX_MIPS_RB532
 	default y
 	help
 	  Adopted from FreeWRT fwcf

package/cfgfs/Makefile

@@ -5,7 +5,7 @@ include ${TOPDIR}/rules.mk
 
 PKG_NAME:=		cfgfs
 PKG_VERSION:=		1.0.6
-PKG_RELEASE:=		2
+PKG_RELEASE:=		3
 PKG_DESCR:=		compressed config filesystem
 PKG_SECTION:=		base
 
@@ -27,14 +27,5 @@ do-install:
 	${INSTALL_DIR} ${IDIR_CFGFS}/sbin
 	${INSTALL_BIN} ${WRKBUILD}/fwcf.sh ${IDIR_CFGFS}/sbin/cfgfs
 	${INSTALL_BIN} ${WRKBUILD}/fwcf.helper.out ${IDIR_CFGFS}/sbin/cfgfs.helper
-ifeq ($(ARCH),cris)
-	${INSTALL_BIN} ${WRKBUILD}/mtd ${IDIR_CFGFS}/sbin/mtd
-	echo '#!/bin/sh' > ${IDIR_CFGFS}/sbin/cfgfs.write
-	echo 'mtd -F write - cfgfs' >> ${IDIR_CFGFS}/sbin/cfgfs.write
-else
-	echo '#!/bin/sh' > ${IDIR_CFGFS}/sbin/cfgfs.write
-	echo 'cat > /dev/sda2' >> ${IDIR_CFGFS}/sbin/cfgfs.write
-endif
-	chmod 755 ${IDIR_CFGFS}/sbin/cfgfs.write
 
 include ${TOPDIR}/mk/pkg-bottom.mk

package/cfgfs/src/fwcf.sh

@@ -114,10 +114,12 @@ EOF
 esac
 
 # find backend device, first try to find partition with ID 88
+mtd=0
 part=$(fdisk -l|awk '$5 == 88 { print $1 }')
 if [ -z $part ]; then
 	# otherwise search for MTD device with name cfgfs
 	part=/dev/mtd$(fgrep '"cfgfs"' /proc/mtd 2>/dev/null | sed 's/^mtd\([^:]*\):.*$/\1/')ro
+	mtd=1
 fi
 
 if [[ ! -e $part ]]; then
@@ -127,7 +129,11 @@ fi
 
 if test $1 = erase; then
 	dd if="$part" 2>&1 | md5sum 2>&1 >/dev/urandom
-	cfgfs.helper -Me | cfgfs.write
+	if [ $mtd -eq 1 ]; then
+		cfgfs.helper -Me | mtd -F write - cfgfs
+	else
+		cfgfs.helper -Me | cat > $part
+	fi
 	exit $?
 fi
 
@@ -153,7 +159,12 @@ if test $1 = setup; then
 		unclean=2
 	else
 		x=$(dd if="$part" bs=4 count=1 2>/dev/null)
-		[[ "$x" = "FWCF" ]] || cfgfs.helper -Me | cfgfs.write
+		[[ "$x" = "FWCF" ]] || \
+			if [ $mtd -eq 1 ]; then
+				cfgfs.helper -Me | mtd -F write - cfgfs
+			else
+				cfgfs.helper -Me | cat > $part
+			fi
 		if ! cfgfs.helper -U /tmp/.cfgfs/temp <"$part"; then
 			unclean=1
 			echo 'cfgfs: error: cannot extract'
@@ -246,9 +257,16 @@ if test $1 = commit; then
 		[[ "$x" = "$y" ]] && rm "../temp/$f"
 	done
 	rv=0
-	if ! ( cfgfs.helper -M /tmp/.cfgfs/temp | cfgfs.write ); then
-		echo 'cfgfs: error: cannot write to $part!'
-		rv=6
+	if [ $mtd -eq 1 ]; then
+		if ! ( cfgfs.helper -M /tmp/.cfgfs/temp | mtd -F write - cfgfs ); then
+			echo 'cfgfs: error: cannot write to $part!'
+			rv=6
+		fi
+	else
+		if ! ( cfgfs.helper -M /tmp/.cfgfs/temp | cat > $part ); then
+			echo 'cfgfs: error: cannot write to $part!'
+			rv=6
+		fi
 	fi
 	umount /tmp/.cfgfs/temp
 	exit $rv
@@ -368,9 +386,16 @@ if test $1 = restore; then
 		rm -rf /tmp/.cfgfs.restore
 		exit 12
 	fi
-	if ! ( cfgfs.helper -MD dump | cfgfs.write ); then
-		echo 'cfgfs: error: cannot write to $part!'
-		exit 6
+	if [ $mtd -eq 1 ]; then
+		if ! ( cfgfs.helper -MD dump | mtd -F write - cfgfs ); then
+			echo 'cfgfs: error: cannot write to $part!'
+			exit 6
+		fi
+	else
+		if ! ( cfgfs.helper -MD dump | cat > $part ); then
+			echo 'cfgfs: error: cannot write to $part!'
+			exit 6
+		fi
 	fi
 	cd /
 	rm -rf /tmp/.cfgfs.restore