/*
* Minecraft Forge
* Copyright (c) 2016.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation version 2.1
* of the License.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
package net.minecraftforge.fml.relauncher;
import java.security.Permission;
/**
* A custom security manager stopping certain events from happening
* unexpectedly.
*
* @author cpw
*
*/
public class FMLSecurityManager extends SecurityManager {
@Override
public void checkPermission(Permission perm)
{
String permName = perm.getName() != null ? perm.getName() : "missing";
if (permName.startsWith("exitVM"))
{
Class<?>[] classContexts = getClassContext();
String callingClass = classContexts.length > 4 ? classContexts[4].getName() : "none";
String callingParent = classContexts.length > 5 ? classContexts[5].getName() : "none";
// FML is allowed to call system exit and the Minecraft applet (from the quit button)
if (!(callingClass.startsWith("net.minecraftforge.fml.")
|| "net.minecraft.server.dedicated.ServerHangWatchdog$1".equals(callingClass)
|| "net.minecraft.server.dedicated.ServerHangWatchdog".equals(callingClass)
|| ( "net.minecraft.client.Minecraft".equals(callingClass) && "net.minecraft.client.Minecraft".equals(callingParent))
|| ("net.minecraft.server.dedicated.DedicatedServer".equals(callingClass) && "net.minecraft.server.MinecraftServer".equals(callingParent)))
)
{
throw new ExitTrappedException();
}
}
else if ("setSecurityManager".equals(permName))
{
throw new SecurityException("Cannot replace the FML security manager");
}
return;
}
@Override
public void checkPermission(Permission perm, Object context)
{
this.checkPermission(perm);
}
public static class ExitTrappedException extends SecurityException {
private static final long serialVersionUID = 1L;
}
}