treewide: don't hardcode "sysupgrade.tgz" file name

1) Add BACKUP_FILE and use it when copying an archive to be restored
   after sysupgrade (on the next preinit).
2) Use CONF_TAR for copying backup prepared by the /sbin/sysupgrade

Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
(cherry picked from commit bf390478727ac5f4f9d6fb684de48b8150bcec67)

package/base-files/files/lib/upgrade/common.sh

@@ -2,6 +2,8 @@
 
 RAM_ROOT=/tmp/root
 
+export BACKUP_FILE=sysupgrade.tgz	# file extracted by preinit
+
 [ -x /usr/bin/ldd ] || ldd() { LD_TRACE_LOADED_OBJECTS=1 $*; }
 libs() { ldd $* 2>/dev/null | sed -r 's/(.* => )?(.*) .*/\2/'; }
 

package/base-files/files/lib/upgrade/nand.sh

@@ -109,7 +109,7 @@ nand_restore_config() {
 		rmdir /tmp/new_root
 		return 1
 	fi
-	mv "$1" "/tmp/new_root/sysupgrade.tgz"
+	mv "$1" "/tmp/new_root/$BACKUP_FILE"
 	umount /tmp/new_root
 	sync
 	rmdir /tmp/new_root

target/linux/apm821xx/base-files/lib/preinit/79_move_config

@@ -4,13 +4,14 @@ BOOTPART=/dev/sda1
 
 move_config() {
 	. /lib/functions.sh
+	. /lib/upgrade/common.sh
 
 	case "$(board_name)" in
 	wd,mybooklive)
 		if [ -b $BOOTPART ]; then
 			mkdir -p /boot
 			mount -t ext4 -o rw,noatime $BOOTPART /boot
-			[ -f /boot/sysupgrade.tgz ] && mv -f /boot/sysupgrade.tgz /
+			[ -f "/boot/$BACKUP_FILE" ] && mv -f "/boot/$BACKUP_FILE" /
 		fi
 		;;
 	*)

target/linux/brcm2708/base-files/lib/preinit/79_move_config

@@ -1,6 +1,8 @@
 #!/bin/sh
 # Copyright (C) 2015 OpenWrt.org
 
+. /lib/upgrade/common.sh
+
 BOOTPART=/dev/mmcblk0p1
 
 move_config() {
@@ -11,7 +13,7 @@ move_config() {
 		insmod vfat
 		mkdir -p /boot
 		mount -t vfat -o rw,noatime $BOOTPART /boot
-		[ -f /boot/sysupgrade.tgz ] && mv -f /boot/sysupgrade.tgz /
+		[ -f "/boot/$BACKUP_FILE" ] && mv -f "/boot/$BACKUP_FILE" /
 	fi
 }
 

target/linux/imx6/base-files/lib/preinit/79_move_config

@@ -2,6 +2,7 @@
 
 . /lib/imx6.sh
 . /lib/functions.sh
+. /lib/upgrade/common.sh
 
 move_config() {
 	local board=$(board_name)
@@ -10,7 +11,7 @@ move_config() {
 	apalis*)
 		if [ -b $(bootpart_from_uuid) ]; then
 			apalis_mount_boot
-			[ -f /boot/sysupgrade.tgz ] && mv -f /boot/sysupgrade.tgz /
+			[ -f "/boot/$BACKUP_FILE" ] && mv -f "/boot/$BACKUP_FILE" /
 			umount /boot
 		fi
 		;;

target/linux/ipq806x/base-files/lib/upgrade/zyxel.sh

@@ -60,7 +60,7 @@ zyxel_do_flash() {
 	mkdir /tmp/new_root
 	mount -t ext4 $loopdev /tmp/new_root && {
 		echo "Saving config to rootfs_data at position ${offset}."
-		cp -v /tmp/sysupgrade.tgz /tmp/new_root/
+		cp -v "$CONF_TAR" /tmp/new_root/
 		umount /tmp/new_root
 	}
 

target/linux/mediatek/base-files/lib/preinit/79_move_config

@@ -1,6 +1,8 @@
 #!/bin/sh
 # Copyright (C) 2015 OpenWrt.org
 
+. /lib/upgrade/common.sh
+
 RECOVERY_PART=/dev/mmcblk0p1
 
 move_config() {
@@ -11,7 +13,7 @@ move_config() {
 		insmod vfat
 		mkdir -p /recovery
 		mount -o rw,noatime $RECOVERY_PART /recovery
-		[ -f /recovery/sysupgrade.tgz ] && mv -f /recovery/sysupgrade.tgz /
+		[ -f "/recovery/$BACKUP_FILE" ] && mv -f "/recovery/$BACKUP_FILE" /
 		umount /recovery
 	fi
 }

target/linux/mvebu/base-files/lib/preinit/79_move_config

@@ -18,7 +18,7 @@ move_config() {
 		esac
 		mkdir -p /boot
 		mount -o rw,noatime "/dev/$partdev" /boot
-		[ -f /boot/sysupgrade.tgz ] && mv -f /boot/sysupgrade.tgz /
+		[ -f "/boot/$BACKUP_FILE" ] && mv -f "/boot/$BACKUP_FILE" /
 		umount /boot
 	fi
 }

target/linux/mvebu/base-files/lib/preinit/81_linksys_syscfg

@@ -4,8 +4,8 @@
 #
 
 preinit_mount_syscfg() {
-
 	. /lib/functions.sh
+	. /lib/upgrade/common.sh
 
 	case $(board_name) in
 	linksys,caiman|linksys,cobra|linksys,mamba|linksys,rango|linksys,shelby|linksys,venom)
@@ -22,12 +22,12 @@ preinit_mount_syscfg() {
 		fi
 		mkdir /tmp/syscfg
 		mount -t ubifs ubi1:syscfg /tmp/syscfg
-		[ -f /tmp/syscfg/sysupgrade.tgz ] && {
+		[ -f "/tmp/syscfg/$BACKUP_FILE" ] && {
 		echo "- config restore -"
 		cd /
-		mv /tmp/syscfg/sysupgrade.tgz /tmp
-		tar xzf /tmp/sysupgrade.tgz
-		rm -f /tmp/sysupgrade.tgz
+		mv "/tmp/syscfg/$BACKUP_FILE" /tmp
+		tar xzf "/tmp/$BACKUP_FILE"
+		rm -f "/tmp/$BACKUP_FILE"
 		sync
 		}
 		;;

target/linux/mvebu/base-files/lib/upgrade/linksys.sh

@@ -93,6 +93,6 @@ platform_do_upgrade_linksys() {
 }
 
 platform_copy_config_linksys() {
-	cp -f /tmp/sysupgrade.tgz /tmp/syscfg/sysupgrade.tgz
+	cp -f "$CONF_TAR" /tmp/syscfg/
 	sync
 }

target/linux/octeon/base-files/lib/preinit/79_move_config

@@ -3,11 +3,12 @@
 
 move_config() {
 	. /lib/functions.sh
+	. /lib/upgrade/common.sh
 
 	case "$(board_name)" in
 		erlite)
 			mount -t vfat /dev/sda1 /mnt
-			[ -f /mnt/sysupgrade.tgz ] && mv -f /mnt/sysupgrade.tgz /
+			[ -f "/mnt/$BACKUP_FILE" ] && mv -f "/mnt/$BACKUP_FILE" /
 			umount /mnt
 			;;
 	esac

target/linux/omap/base-files/lib/preinit/79_move_config

@@ -8,8 +8,8 @@ move_config() {
 
 	if export_bootdevice && export_partdevice partdev 1; then
 		if mount -t vfat -o rw,noatime "/dev/$partdev" /mnt; then
-			if [ -f /mnt/sysupgrade.tgz ]; then
-				mv -f /mnt/sysupgrade.tgz /
+			if [ -f "/mnt/$BACKUP_FILE" ]; then
+				mv -f "/mnt/$BACKUP_FILE" /
 			fi
 			umount /mnt
 		fi

target/linux/sunxi/base-files/lib/preinit/79_move_config

@@ -8,8 +8,8 @@ move_config() {
 
 	if export_bootdevice && export_partdevice partdev 1; then
 		if mount -t vfat -o rw,noatime "/dev/$partdev" /mnt; then
-			if [ -f /mnt/sysupgrade.tgz ]; then
-				mv -f /mnt/sysupgrade.tgz /
+			if [ -f "/mnt/$BACKUP_FILE" ]; then
+				mv -f "/mnt/$BACKUP_FILE" /
 			fi
 			umount /mnt
 		fi

target/linux/tegra/base-files/lib/preinit/79_move_config

@@ -8,9 +8,9 @@ move_config() {
 	if export_bootdevice && export_partdevice partdev 1; then
 		mkdir -p /boot
 		if mount -o ro,noatime "/dev/$partdev" /boot; then
-			if [ -f /boot/sysupgrade.tgz ]; then
+			if [ -f "/boot/$BACKUP_FILE" ]; then
 				mount /boot -o remount,rw,noatime
-				mv -f /boot/sysupgrade.tgz /
+				mv -f "/boot/$BACKUP_FILE" /
 			fi
 			umount /boot
 			rm -fR /boot

target/linux/x86/base-files/lib/preinit/79_move_config

@@ -9,8 +9,8 @@ move_config() {
 	if export_bootdevice && export_partdevice partdev 1; then
 		mkdir -p /boot
 		mount -t ext4 -o rw,noatime "/dev/$partdev" /boot
-		if [ -f /boot/sysupgrade.tgz ]; then
-			mv -f /boot/sysupgrade.tgz /
+		if [ -f "/boot/$BACKUP_FILE" ]; then
+			mv -f "/boot/$BACKUP_FILE" /
 		fi
 		mount --bind /boot/boot /boot
 	fi