/*
* The MIT License
*
* Copyright (c) 2004-2009, Sun Microsystems, Inc.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
package hudson.lifecycle;
import com.sun.akuma.JavaVMArguments;
import com.sun.akuma.Daemon;
import com.sun.jna.Native;
import com.sun.jna.StringArray;
import java.io.IOException;
import static hudson.util.jna.GNUCLibrary.*;
import hudson.Platform;
import jenkins.model.Jenkins;
/**
* {@link Lifecycle} implementation when Hudson runs on the embedded
* servlet container on Unix.
*
* <p>
* Restart by exec to self.
*
* @author Kohsuke Kawaguchi
* @since 1.304
*/
public class UnixLifecycle extends Lifecycle {
private JavaVMArguments args;
private Throwable failedToObtainArgs;
public UnixLifecycle() throws IOException {
try {
args = JavaVMArguments.current();
// if we are running as daemon, don't fork into background one more time during restart
args.remove("--daemon");
} catch (UnsupportedOperationException e) {
// can't restart
failedToObtainArgs = e;
} catch (LinkageError e) {
// see HUDSON-3875
failedToObtainArgs = e;
}
}
@Override
public void restart() throws IOException, InterruptedException {
Jenkins h = Jenkins.getInstance();
if (h != null)
h.cleanUp();
// close all files upon exec, except stdin, stdout, and stderr
int sz = LIBC.getdtablesize();
for(int i=3; i<sz; i++) {
int flags = LIBC.fcntl(i, F_GETFD);
if(flags<0) continue;
LIBC.fcntl(i, F_SETFD,flags| FD_CLOEXEC);
}
// exec to self
String exe = Daemon.getCurrentExecutable();
LIBC.execv(exe, new StringArray(args.toArray(new String[args.size()])));
throw new IOException("Failed to exec '"+exe+"' "+LIBC.strerror(Native.getLastError()));
}
@Override
public void verifyRestartable() throws RestartNotSupportedException {
// see http://lists.apple.com/archives/cocoa-dev/2005/Oct/msg00836.html and
// http://factor-language.blogspot.com/2007/07/execve-returning-enotsup-on-mac-os-x.html
// on Mac, execv fails with ENOTSUP if the caller is multi-threaded, resulting in an error like
// the one described in http://www.nabble.com/Restarting-hudson-not-working-on-MacOS--to24641779.html
//
// according to http://www.mail-archive.com/wine-devel@winehq.org/msg66797.html this now works on Snow Leopard
if (Platform.isDarwin() && !Platform.isSnowLeopardOrLater())
throw new RestartNotSupportedException("Restart is not supported on Mac OS X");
if (args==null)
throw new RestartNotSupportedException("Failed to obtain the command line arguments of the process",failedToObtainArgs);
}
}