VirtualChannel start(TaskListener listener, String rootPassword)
throws IOException, InterruptedException {
final int uid = LIBC.geteuid();
if (uid == 0) // already running as root
return newLocalChannel();
String javaExe = System.getProperty("java.home") + "/bin/java";
File slaveJar = Which.jarFile(Launcher.class);
ArgumentListBuilder args = new ArgumentListBuilder().add(javaExe);
if (slaveJar.isFile()) args.add("-jar").add(slaveJar);
else // in production code this never happens, but during debugging this is convenientud
args.add("-cp").add(slaveJar).add(hudson.remoting.Launcher.class.getName());
if (rootPassword == null) {
// try sudo, in the hope that the user has the permission to do so without password
return new LocalLauncher(listener)
.launchChannel(
args.prepend(sudoExe()).toCommandArray(),
listener.getLogger(),
null,
Collections.<String, String>emptyMap());
} else {
// try sudo with the given password. Also run in pfexec so that we can elevate the
// privileges
Process proc = sudoWithPass(args);
return Channels.forProcess(
args.toStringWithQuote(), Computer.threadPoolForRemoting, proc, listener.getLogger());
}
}
