[package] base/block-extroot, base/block-mount: Modified preinit and block-extroot and

block-mount so that use of block-mount and block-extroot do not require that block-extroot,
block-mount, nor the kernel modules they depend, on are required to included in the image.
That is block-extroot and dependencies may now be installed as modules onto the jffs2 part of
a squashfs system and it will work. 
In addition packages which are installed into the jffs2 of a squashfs system may now affect
preinit, so long as they do not require execution of commands that occur before the merging of
the jffs2 and built-in (squashfs) preinit scripts is done.

Thanks jow for the preinit merge stuff!



git-svn-id: svn://svn.openwrt.org/openwrt/trunk@23110 3c298f89-4303-0410-b956-a3cf2f4a3e73

package/base-files/files/etc/functions.sh

@@ -292,4 +292,25 @@ service_kill() {
 	done
 }
 
+
+pi_include() {
+	if [ -f "/tmp/overlay/$1" ]; then
+		. "/tmp/overlay/$1"
+	elif [ -f "$1" ]; then
+		. "$1"
+	elif [ -d "/tmp/overlay/$1" ]; then
+		for src_script in /tmp/overlay/$1/*.sh; do
+			. "$src_script"
+		done
+	elif [ -d "$1" ]; then
+		for src_script in $1/*.sh; do
+			. "$src_script"
+		done
+	else
+		echo "WARNING: $1 not found"
+		return 1
+	fi
+	return 0
+}
+
 [ -z "$IPKG_INSTROOT" -a -f /lib/config/uci.sh ] && . /lib/config/uci.sh