package org.act.tstream.container;
import java.io.IOException;
import org.apache.commons.io.IOUtils;
import org.apache.log4j.BasicConfigurator;
import org.apache.log4j.Logger;
public class SystemOperation {
public static final Logger LOG = Logger.getLogger(SystemOperation.class);
public static boolean isRoot() throws IOException {
String result = SystemOperation.exec("echo $EUID").substring(0, 1);
return Integer.valueOf(result.substring(0, result.length())).intValue() == 0 ? true
: false;
};
public static void mount(String name, String target, String type,
String data) throws IOException {
StringBuilder sb = new StringBuilder();
sb.append("mount -t ").append(type).append(" -o ").append(data)
.append(" ").append(name).append(" ").append(target);
SystemOperation.exec(sb.toString());
}
public static void umount(String name) throws IOException {
StringBuilder sb = new StringBuilder();
sb.append("umount ").append(name);
SystemOperation.exec(sb.toString());
}
public static String exec(String cmd) throws IOException {
LOG.debug("Shell cmd: " + cmd);
Process process = new ProcessBuilder(new String[] { "/bin/bash", "-c",
cmd }).start();
try {
process.waitFor();
String output = IOUtils.toString(process.getInputStream());
String errorOutput = IOUtils.toString(process.getErrorStream());
LOG.debug("Shell Output: " + output);
if (errorOutput.length() != 0) {
LOG.error("Shell Error Output: " + errorOutput);
throw new IOException(errorOutput);
}
return output;
} catch (InterruptedException ie) {
throw new IOException(ie.toString());
}
}
public static void main(String[] args) throws IOException {
BasicConfigurator.configure();
SystemOperation.mount("test", "/cgroup/cpu", "cgroup", "cpu");
}
}