Split main func (no os/proj dependency)

src/func/filesystem_extract

@@ -0,0 +1,44 @@
+#!/bin/bash
+#remaster lib
+[ -d "$LIBDR"] || export LIBDIR="/usr/lib/remaster/"
+[ -d "$LIBDR"] || { echo "LIBDR not exist"; exit 1; }
+
+#filesystem_extract [filesystem_img_source] [chroot_path]
+function filesystem_extract() {
+	echo "extract filesystem ..."
+
+	#$1 = filesystem_img_source
+	#$2 = chroot_path
+	filesystem_img_source="$1"
+	chroot_path="$2"
+	filesystem_log="`mktemp`"
+
+	#Überfrüfen der Parameter
+	[ -f "$filesystem_img_source" ] || {
+		echo "### ERROR ### filesystem_extract: squashfs \"$filesystem_img_source\" not exist!"
+		return 11
+	}
+
+	[ "`mkdir -p "$chroot_path"`" != "" ] && {
+		echo "### ERROR ### filesystem_extract: chroot_path \"$chroot_path\" can't create!"
+		return 13
+	}
+
+	[ "`filesystem_get_type $chroot_path`" != "ext4" ] && [ "`filesystem_get_type $chroot_path`" != "btrfs" ] && {
+		echo "### ERROR ### filesystem_extract: wrong filesystem (`filesystem_get_type $chroot_path`)!"
+		return 22
+	}
+
+	rm -r "$chroot_path"
+
+	#eigendliches entpacken
+	unsquashfs -d "$chroot_path" "$filesystem_img_source" > "$filesystem_log" || {
+		echo "### ERROR ### filesystem_extract: unsquashfs failed!"
+		return 14
+	}
+
+	grep -v "\[" "$filesystem_log"
+	rm "$filesystem_log"
+
+	echo "done"
+}