1 files changed, 22 insertions, 7 deletions
diff --git a/src/main/java/io/github/jshipit/SysUtils.java b/src/main/java/io/github/jshipit/SysUtils.java
index 3ea48fb..877b61e 100644
--- a/src/main/java/io/github/jshipit/SysUtils.java
+++ b/src/main/java/io/github/jshipit/SysUtils.java
@@ -1,19 +1,34 @@
 package io.github.jshipit;
 
-import com.sun.jna.Library;
-import com.sun.jna.Native;
 import com.sun.jna.Platform;
 
+import java.io.File;
+
 public class SysUtils {
 
-    interface CLibrary extends Library {
-        public int chmod(String path, int mode);
+    public void chmod(String path, int mode) {
+        ProcessBuilder pb = new ProcessBuilder("chmod", Integer.toString(mode), path);
+        pb.inheritIO();
+        try {
+            Process p = pb.start();
+            p.waitFor();
+        } catch (Exception e) {
+            throw new RuntimeException(e);
+        }
     }
 
-    public void chmod(String path, int mode) {
-        CLibrary libc = (CLibrary) Native.load("c", CLibrary.class);
-        libc.chmod(path, mode);
+    public void untar(String in, String out) {
+        new File(out).mkdirs();
+        ProcessBuilder pb = new ProcessBuilder("tar", "-xf", in, "-C", out);
+        pb.inheritIO();
+        try {
+            Process p = pb.start();
+            p.waitFor();
+        } catch (Exception e) {
+            throw new RuntimeException(e);
+        }
     }
+
     public void overlayMount(String[] lower, String upper, String target, String work) {
         if (Platform.isLinux()) {