- Added support for setting the terminal foreground color.

- Some improvements to error handling.

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

@@ -1,17 +1,26 @@
 package net.rubygrapefruit.platform.internal;
 
 public class FunctionResult {
+    String message;
     int errno;
 
-    void failed(int errno) {
+    void failed(String message, int errno) {
+        this.message = message;
         this.errno = errno;
     }
 
-    public boolean isFailed() {
-        return errno != 0;
+    void failed(String message) {
+        this.message = message;
     }
 
-    public int getErrno() {
-        return errno;
+    public boolean isFailed() {
+        return message != null;
+    }
+
+    public String getMessage() {
+        if (errno != 0) {
+            return String.format("%s (errno %d)", message, errno);
+        }
+        return message;
     }
 }