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package ysoserial;
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import java.security.Permission;
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import java.util.concurrent.Callable;
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public class ExecBlockingSecurityManager extends SecurityManager {
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	@Override
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	public void checkPermission(final Permission perm) { }
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	@Override
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	public void checkPermission(final Permission perm, final Object context) { }			
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	public void checkExec(final String cmd) {
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		super.checkExec(cmd);
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		// throw a special exception to ensure we can detect exec() in the test
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		throw new ExecException(cmd);
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	};
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	@SuppressWarnings("serial")
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	public static class ExecException extends RuntimeException {
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		private final String cmd;
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		public ExecException(String cmd) { this.cmd = cmd; }
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		public String getCmd() { return cmd; }		
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	}		
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	public static void wrap(final Runnable runnable) throws Exception {
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		wrap(new Callable<Void>(){
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			public Void call() throws Exception {
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				runnable.run();
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				return null;
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			}			
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		});		
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	}
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	public static <T> T wrap(final Callable<T> callable) throws Exception {
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		SecurityManager sm = System.getSecurityManager();
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		System.setSecurityManager(new ExecBlockingSecurityManager());
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		try {
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			return callable.call();
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		} finally {
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			System.setSecurityManager(sm);
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		}		
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	}
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}
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