initial version

src/main/java/net/rubygrapefruit/platform/internal/FileStat.java

@@ -0,0 +1,5 @@
+package net.rubygrapefruit.platform.internal;
+
+public class FileStat {
+    public int mode;
+}

src/main/java/net/rubygrapefruit/platform/internal/FunctionResult.java

@@ -0,0 +1,13 @@
+package net.rubygrapefruit.platform.internal;
+
+public class FunctionResult {
+    int errno;
+
+    public boolean isFailed() {
+        return errno != 0;
+    }
+
+    public int getErrno() {
+        return errno;
+    }
+}

src/main/java/net/rubygrapefruit/platform/internal/PosixFileFunctions.java

@@ -0,0 +1,7 @@
+package net.rubygrapefruit.platform.internal;
+
+public class PosixFileFunctions {
+    public static native void chmod(String file, int perms, FunctionResult result);
+
+    public static native void stat(String file, FileStat stat, FunctionResult result);
+}