initial commit

JailBreakDetector.h

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+//
+//  JailBreakDetector.h
+//  JailBreakDetector
+//
+//  Created by Di Wu on 3/9/13.
+//  Copyright (c) 2013 Di Wu. All rights reserved.
+//
+
+#import <Foundation/Foundation.h>
+
+@interface JailBreakDetector : NSObject
+
++ (BOOL)isJailBreak;
+
+@end

JailBreakDetector.m

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+//
+//  JailBreakDetector.m
+//  JailBreakDetector
+//
+//  Created by Di Wu on 3/9/13.
+//  Copyright (c) 2013 Di Wu. All rights reserved.
+//
+
+#import "JailBreakDetector.h"
+
+@implementation JailBreakDetector
+
++ (BOOL)isJailBreak
+{
+    BOOL cydia = NO;
+    BOOL binBash = NO;
+    NSString *filePath = @"/Applications/Cydia.app";
+    if ([[NSFileManager defaultManager] fileExistsAtPath:filePath])
+    {
+        cydia = YES;
+    }
+
+    FILE * f = fopen("/bin/bash", "r");
+    if (f != NULL)
+    {
+        binBash = YES;
+    }
+    fclose(f);
+
+    if (cydia || binBash) {
+        return YES;
+    } else {
+        return NO;
+    }
+}
+
+@end

README.md

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+# iOS Jailbreak Detector
+
+
+## Overview
+
+A drop-in class that dynamically detects whether the iOS device your app is running on has been jailbroken or not.
+
+## 100% App Store Submission Safe. No Private API
+
+I myself have a few apps using this class to detect jailbreak devices. So far 100% App Store submission safe.
+
+##License
+The code is released under the [MIT License](http://opensource.org/licenses/mit-license.php).
+
+##Contact
+Email: [email protected]
+
+:)