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/*___INFO__MARK_BEGIN__*/
/*************************************************************************
*
* The Contents of this file are made available subject to the terms of
* the Sun Industry Standards Source License Version 1.2
*
* Sun Microsystems Inc., March, 2001
*
*
* Sun Industry Standards Source License Version 1.2
* =================================================
* The contents of this file are subject to the Sun Industry Standards
* Source License Version 1.2 (the "License"); You may not use this file
* except in compliance with the License. You may obtain a copy of the
* License at http://gridengine.sunsource.net/Gridengine_SISSL_license.html
*
* Software provided under this License is provided on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING,
* WITHOUT LIMITATION, WARRANTIES THAT THE SOFTWARE IS FREE OF DEFECTS,
* MERCHANTABLE, FIT FOR A PARTICULAR PURPOSE, OR NON-INFRINGING.
* See the License for the specific provisions governing your rights and
* obligations concerning the Software.
*
* The Initial Developer of the Original Code is: Sun Microsystems, Inc.
*
* Copyright: 2001 by Sun Microsystems, Inc.
*
* All Rights Reserved.
*
************************************************************************/
/*___INFO__MARK_END__*/
package com.sun.grid.util;
import com.sun.grid.util.expect.Expect;
import com.sun.grid.util.expect.ExpectBuffer;
import com.sun.grid.util.expect.ExpectHandler;
import java.io.ByteArrayInputStream;
import java.io.File;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.Reader;
import java.util.HashMap;
import java.util.Locale;
import java.util.Map;
/**
* This class defines some helper methods which are vital
* for gridengine.
*
*/
public class SGEUtil {
private SGEUtil() {
}
private static SGEUtil theInstance;
/**
* Get the instance of the <code>SGEUtil</code>.
*
* The first call of this method tries to load the native
* library juti.
*
* @see java.lang.System#loadLibrary
* @return the instance of <code>SGEUtil</code>
*/
public synchronized static SGEUtil getInstance() {
if(theInstance == null) {
System.loadLibrary("juti");
theInstance = new SGEUtil();
}
return theInstance;
}
/**
* get pid of the java virtual machine
* @return the pid of the java virtual machine
*/
public native int getPID();
/**
* Read a password from the console.
*
* @param prompt the prompt
* @return the password
*/
public char[] getPassword(String prompt) {
System.out.print(prompt);
byte [] bytes = getNativePassword();
if(bytes == null || bytes.length == 0) {
return null;
}
Reader rd = new InputStreamReader(new ByteArrayInputStream(bytes));
StringBuffer buf = new StringBuffer();
char [] tmp = new char[50];
int len = 0;
try {
while( (len = rd.read(tmp)) > 0 ) {
buf.append(tmp, 0, len);
}
char [] ret = new char[buf.length()];
for(int i = 0; i < ret.length; i++) {
ret[i] = buf.charAt(i);
}
return ret;
} catch (IOException ex) {
throw new IllegalStateException("IO error while reading from byte array");
}
}
/**
* Read a password for the console.
*
* @return the bytes of the password
*/
private native byte[] getNativePassword();
private static Map archMap = new HashMap();
private static Boolean isWindows;
public static synchronized boolean isWindows() {
if (isWindows == null) {
String osname = System.getProperty("os.name").toLowerCase(Locale.US);
if(osname.indexOf("windows") >= 0) {
isWindows = Boolean.TRUE;
} else {
isWindows = Boolean.FALSE;
}
}
return isWindows.booleanValue();
}
/* Get the arch string for a gridengine installation
* @param sgeRoot the sge root directory
* @throws java.io.IOException if the execution of the arch script fails
* @return the arch string
*/
public static synchronized String getArch(File sgeRoot) throws IOException {
String ret = (String)archMap.get(sgeRoot);
if(ret == null) {
if(isWindows()) {
ret = "win32-x86";
} else {
Expect expect = new Expect();
expect.env().add("SGE_ROOT=" + sgeRoot.getAbsolutePath());
expect.command().add( sgeRoot.getAbsolutePath() + File.separatorChar + "util" + File.separatorChar + "arch");
ArchExpectHandler archHandler = new ArchExpectHandler();
expect.add(archHandler);
try {
int res = expect.exec(10000);
if(res != 0) {
throw new IOException("arch script exited with status (" + ret +")");
}
ret = archHandler.getArch();
if(ret == null) {
throw new IllegalStateException("arch script did not produce any output");
}
} catch (InterruptedException ex) {
throw new IllegalStateException("arch script has been interrupted");
}
}
archMap.put(sgeRoot, ret);
}
return ret;
}
private static class ArchExpectHandler implements ExpectHandler {
public void handle(Expect expect, ExpectBuffer buffer) throws IOException {
String msg = buffer.consumeLine();
if(msg != null) {
msg = msg.trim();
if( msg.length() > 0 && arch == null)
arch = msg;
}
}
private String arch;
public String getArch() {
return arch;
}
}
}
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