base-files: make firstboot ask for confirmation

To prevent accidential resets ask for confirmation (and default to n).

Signed-off-by: Jonas Gorski <jogo@openwrt.org>

SVN-Revision: 35712

package/base-files/files/sbin/firstboot

@@ -20,7 +20,14 @@ set_jffs_part
 if [ "${0##*/}" = "firstboot" ]; then
     if [ "$1" = "switch2jffs" ]; then
 	boot_run_hook switch2jffs
-    elif [ -n "$jffs" ]; then
+    else
+	local input
+
+	echo -n  "firstboot will erase all settings and remove any installed packages. Are you sure? [N/y]"
+	read input
+	[ "$input" = "y" ] || [ "$input" = "Y" ] || return 0
+
+	if [ -n "$jffs" ]; then
 	    reset_has_fo=true
 	    echo "firstboot has already been run"
 	    echo "jffs2 partition is mounted, only resetting files"
@@ -31,4 +38,5 @@ if [ "${0##*/}" = "firstboot" ]; then
 	    fopivot /overlay /rom 1
 	fi
     fi
+fi