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/*******************************************************************************
* Copyright (c) 2011 Wind River Systems, Inc. and others. All rights reserved.
* This program and the accompanying materials are made available under the terms
* of the Eclipse Public License v1.0 which accompanies this distribution, and is
* available at http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Wind River Systems - initial API and implementation
*******************************************************************************/
package org.eclipse.tcf.te.runtime.utils;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.FilenameFilter;
import java.io.IOException;
/**
* Determine the current host environment.
*/
public final class Host {
private static Boolean isWindowsHost = null;
private static Boolean isInteractive = null;
private static Boolean isHeadless = null;
private static Boolean isLinuxHost = null;
/**
* Method looking up the current host (once) and returning a boolean indicating whether the host
* is Unix(false) or Windows(true).
*
* @return boolean true if running on Windows host
*/
public static boolean isWindowsHost() {
if (isWindowsHost == null) {
if (System.getProperty("os.name", "").toLowerCase().startsWith("windows")) { //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$
isWindowsHost = Boolean.TRUE;
}
else {
isWindowsHost = Boolean.FALSE;
}
}
return isWindowsHost.booleanValue();
}
/**
* Method looking up the current host (once) and returning a boolean indicating whether the host
* is Linux(true) or something else (false).
*
* @return boolean true if running on Linux host
*/
public static boolean isLinuxHost() {
if (isLinuxHost == null) {
if (System.getProperty("os.name", "").toLowerCase().startsWith("linux")) { //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$
isLinuxHost = Boolean.TRUE;
}
else {
isLinuxHost = Boolean.FALSE;
}
}
return isLinuxHost.booleanValue();
}
/**
* Returns the content of the release file which exists in every linux distribution in /etc.
* e.g. /etc/redhat-release . The file holds information about the distribution itself.
*
* @return String containing the first line of the linux distri's release file. e.g. Red Hat
* Enterprise Linux WS release 4 (Nahant Update 3)
*/
public static String getLinuxRelease() {
String firstLine = "Unknown"; //$NON-NLS-1$
File etcdir = new File("/etc");//$NON-NLS-1$
String[] list = etcdir.list(new FilenameFilter() {
@Override
public boolean accept(File dir, String name) {
String[] distStrings = { "fedora-release", //$NON-NLS-1$
"redhat-release", //$NON-NLS-1$
"SuSE-release", //$NON-NLS-1$
"lsb-release" }; //$NON-NLS-1$
// Strip path information:
String f = new File(name).getName();
String filter;
for (String distString : distStrings) {
filter = distString;
if (f.equalsIgnoreCase(filter)) {
return true;
}
}
return false;
}
});
if (list == null || list.length == 0) {
return "Unknown"; //$NON-NLS-1$
}
String entry = list[0];
if (Boolean.getBoolean("shell.debug")) { //$NON-NLS-1$
System.out.println("UtilityEnvironment#getLinuxRelease: reading file: " + etcdir + "/" + entry); //$NON-NLS-1$ //$NON-NLS-2$
}
BufferedReader reader = null;
try {
reader = new BufferedReader(new FileReader(new File(etcdir + "/" + entry))); //$NON-NLS-1$
// In case of "lsb-release" we have to look for the line starting with
// "DISTRIB_DESCRIPTION"
if ("lsb-release".equalsIgnoreCase(entry)) { //$NON-NLS-1$
while (firstLine != null && !firstLine.toUpperCase()
.startsWith("DISTRIB_DESCRIPTION")) { //$NON-NLS-1$
if (Boolean.getBoolean("shell.debug")) { //$NON-NLS-1$
System.out.println("UtilityEnvironment#getLinuxRelease: firstLine='" + firstLine + "'"); //$NON-NLS-1$ //$NON-NLS-2$
}
firstLine = reader.readLine();
}
}
else {
// Just read the first line
firstLine = reader.readLine();
}
}
catch (IOException ioe) {
firstLine = "Unknown"; //$NON-NLS-1$
}
finally {
if (reader != null) {
try {
reader.close();
}
catch (IOException ex) {
// silently ignored
}
}
}
firstLine = firstLine != null ? firstLine : "Unknown"; //$NON-NLS-1$
if (Boolean.getBoolean("shell.debug")) { //$NON-NLS-1$
System.out.println("UtilityEnvironment#getLinuxRelease: return value='" + firstLine + "'"); //$NON-NLS-1$ //$NON-NLS-2$
}
return firstLine;
}
/**
* Check if running interactive (default) or in batch mode (e.g. during unit tests).
*
* @return boolean <code>true</code> if running in interactive mode (default) or
* <code>false</code> if not (-DNOINTERACTIVE=true).
*/
public static boolean isInteractive() {
if (isInteractive == null) {
boolean batchMode = Boolean.valueOf(System.getProperty("NOINTERACTIVE")).booleanValue(); //$NON-NLS-1$
isInteractive = Boolean.valueOf(!batchMode);
}
return isInteractive.booleanValue();
}
/**
* Check if running in headless mode or with full UI.
*
* @return <code>true</code> if running in headless mode, <code>false</code> otherwise.
*/
public static boolean isHeadless() {
if (isHeadless == null) {
String headless = System.getProperty("HEADLESS"); //$NON-NLS-1$
isHeadless = Boolean.valueOf(headless);
}
return isHeadless.booleanValue();
}
}
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