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// Copyright 2016 Yahoo Inc. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.log;
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.net.InetAddress;
/**
*
* @author Bjorn Borud
* @author arnej27959
*
*/
public class Util {
/**
* We do not have direct access to the <code>gethostname</code>
* system call, so we have to fake it.
*/
public static String getHostName () {
String hostname = "-";
try {
Process p = Runtime.getRuntime().exec("hostname");
BufferedReader r = new BufferedReader(
new InputStreamReader(p.getInputStream(), "UTF-8"));
hostname = r.readLine();
if (hostname != null) {
return hostname;
}
}
catch (java.io.IOException e) {}
try {
hostname = InetAddress.getLocalHost().getHostName();
return hostname;
}
catch (java.net.UnknownHostException e) {}
return "-";
}
/**
* Emulate the getpid() system call
**/
public static String getPID() {
try {
Process p = Runtime.getRuntime().exec(
new String[] {"perl", "-e", "print getppid().\"\\n\";"}
);
BufferedReader r = new BufferedReader(
new InputStreamReader(p.getInputStream(), "UTF-8"));
String line = r.readLine();
p.destroy();
int pid = Integer.parseInt(line);
if (pid > 0) {
return Integer.toString(pid);
}
} catch(Exception e) {
// any problem handled by return below
}
return "-";
}
}
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