package org.limewire.util;
import java.io.IOException;
import java.util.Locale;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
/**
* Provides methods to get operating system properties, resources and versions,
* and determine operating system criteria.
*/
public class OSUtils {
private static final Log LOG = LogFactory.getLog(OSUtils.class);
static {
setOperatingSystems();
}
/**
* Variable for whether or not we're on Windows.
*/
private static boolean _isWindows;
/**
* Variable for whether or not we're on Windows NT.
*/
private static boolean _isWindowsNT;
/**
* Variable for whether or not we're on Windows XP.
*/
private static boolean _isWindowsXP;
/**
* Variable for whether or not we're on Windows 7.
*/
private static boolean _isWindows7;
/**
* Variable for whether or not we're on Windows 95.
*/
private static boolean _isWindows95;
/**
* Variable for whether or not we're on Windows 98.
*/
private static boolean _isWindows98;
/**
* Variable for whether or not we're on Windows Me.
*/
private static boolean _isWindowsMe;
/**
* Variable for whether or not we're on Windows Vista.
*/
private static boolean _isWindowsVista;
/**
* The Windows service pack version - only applicable to XP and Vista.
*/
private static int _windowsServicePack;
/**
* Variable for whether or not the operating system allows the
* application to be reduced to the system tray.
*/
private static boolean _supportsTray;
/**
* Variable for whether or not we're on Mac OS X.
*/
private static boolean _isMacOSX;
/**
* Variable for whether or not we're on Linux.
*/
private static boolean _isLinux;
/**
* Variable for whether or not we're on Solaris.
*/
private static boolean _isSolaris;
/**
* Variable for whether or not we're on OS/2.
*/
private static boolean _isOS2;
/**
* Sets the operating system variables.
*/
public static void setOperatingSystems() {
_isWindows = false;
_windowsServicePack = 0;
_isWindowsVista = false;
_isWindowsNT = false;
_isWindowsXP = false;
_isWindows7 = false;
_isWindows95 = false;
_isWindows98 = false;
_isWindowsMe = false;
_isSolaris = false;
_isLinux = false;
_isOS2 = false;
_isMacOSX = false;
String os = System.getProperty("os.name").toLowerCase(Locale.US);
String version = System.getProperty("os.version").toLowerCase(Locale.US);
// set the operating system variables
_isWindows = os.indexOf("windows") != -1;
if (os.indexOf("windows nt") != -1) {
_isWindowsNT = true;
} else if (os.indexOf("windows xp") != -1) {
_isWindowsXP = true;
} else if(os.indexOf("windows 7") != -1) {
_isWindows7 = true;
} else if (os.indexOf("windows vista") != -1 && version.startsWith("6.1")) {
//In jdk 1.6 before update 14 the os.name system property still returns Windows Vista
//The version number is set to 6.1 however, so we can check for that and windows vista
//together to determine if it is windows 7
_isWindows7 = true;
} else if (os.indexOf("windows vista") != -1) {
_isWindowsVista = true;
} else if(os.indexOf("windows 95") != -1) {
_isWindows95 = true;
} else if(os.indexOf("windows 98") != -1) {
_isWindows98 = true;
} else if(os.indexOf("windows me") != -1) {
_isWindowsMe = true;
} else if(os.indexOf("solaris") != -1) {
_isSolaris = true;
} else if(os.indexOf("linux") != -1) {
_isLinux = true;
} else if(os.indexOf("os/2") != -1) {
_isOS2 = true;
}
if(_isWindows || _isLinux)
_supportsTray = true;
if(os.startsWith("mac os")) {
if(os.endsWith("x")) {
_isMacOSX = true;
}
}
// If this is Windows XP or Vista, try to find out which service pack
// is installed.
if(_isWindowsXP || _isWindowsVista) {
try {
String ver = SystemUtils.registryReadText(
"HKEY_LOCAL_MACHINE",
"Software\\Microsoft\\Windows NT\\CurrentVersion",
"CSDVersion");
ver = ver.replaceAll("[^0-9]", "");
_windowsServicePack = Integer.parseInt(ver);
if(LOG.isDebugEnabled())
LOG.debug("Windows service pack " + _windowsServicePack);
} catch(IOException e) {
LOG.debug("Failed to determine Windows service pack", e);
} catch(NumberFormatException e) {
LOG.debug("Failed to determine Windows service pack", e);
}
}
}
/**
* Returns the operating system.
*/
public static String getOS() {
return System.getProperty("os.name");
}
/**
* Returns the operating system version.
*/
public static String getOSVersion() {
return System.getProperty("os.version");
}
/**
* Returns the operating system architecture.
*/
public static String getOSArch() {
return System.getProperty("os.arch");
}
/**
* Returns true if this is Windows NT or Windows 2000 and
* hence can support a system tray feature.
*/
public static boolean supportsTray() {
return _supportsTray;
}
/**
* Returns whether or not the OS is some version of Windows.
*
* @return <tt>true</tt> if the application is running on some Windows
* version, <tt>false</tt> otherwise
*/
public static boolean isWindows() {
return _isWindows;
}
/**
* Returns whether or not the OS is WinXP.
*
* @return <tt>true</tt> if the application is running on WinXP,
* <tt>false</tt> otherwise
*/
public static boolean isWindowsXP() {
return _isWindowsXP;
}
/**
* Returns whether or not the OS is Windows 7..
*
* @return <tt>true</tt> if the application is running on Windows 7,
* <tt>false</tt> otherwise
*/
public static boolean isWindows7() {
return _isWindows7;
}
/**
* @return true if the application is running on Windows NT
*/
public static boolean isWindowsNT() {
return _isWindowsNT;
}
/**
* @return true if the application is running on Windows 95
*/
public static boolean isWindows95() {
return _isWindows95;
}
/**
* @return true if the application is running on Windows 98
*/
public static boolean isWindows98() {
return _isWindows98;
}
/**
* @return true if the application is running on Windows ME
*/
public static boolean isWindowsMe() {
return _isWindowsMe;
}
/**
* @return true if the application is running on Windows Vista
*/
public static boolean isWindowsVista() {
return _isWindowsVista;
}
/**
* @return true if the application is running on a windows with
* the 10 socket limit.
*/
public static boolean isSocketChallengedWindows() {
return _isWindowsXP || (_isWindowsVista && _windowsServicePack < 3);
}
/**
* Returns true if the application is compatible with the AVG SDK.
*/
public static boolean isAVGCompatibleWindows() {
return _isWindows7 || _isWindowsVista || (_isWindowsXP && _windowsServicePack >= 2);
}
/**
* Returns whether or not the OS is OS/2.
*
* @return <tt>true</tt> if the application is running on OS/2,
* <tt>false</tt> otherwise
*/
public static boolean isOS2() {
return _isOS2;
}
/**
* Returns whether or not the OS is Mac OS X.
*
* @return <tt>true</tt> if the application is running on Mac OS X,
* <tt>false</tt> otherwise
*/
public static boolean isMacOSX() {
return _isMacOSX;
}
/**
* Returns whether or not the OS is Solaris.
*
* @return <tt>true</tt> if the application is running on Solaris,
* <tt>false</tt> otherwise
*/
public static boolean isSolaris() {
return _isSolaris;
}
/**
* Returns whether or not the OS is Linux.
*
* @return <tt>true</tt> if the application is running on Linux,
* <tt>false</tt> otherwise
*/
public static boolean isLinux() {
return _isLinux;
}
/**
* Returns whether or not the OS is some version of
* Unix, defined here as only Solaris or Linux.
*/
public static boolean isUnix() {
return _isLinux || _isSolaris;
}
/**
* Returns whether the OS is POSIX-like.
*/
public static boolean isPOSIX() {
return _isLinux || _isSolaris || _isMacOSX;
}
/**
* Returns whether or not this operating system is considered
* capable of meeting the requirements of a high load server.
*
* @return <tt>true</tt> if this OS meets high load server requirements,
* <tt>false</tt> otherwise
*/
public static boolean isHighLoadOS() {
return !(_isWindows98 || _isWindows95 || _isWindowsMe || _isWindowsNT);
}
/**
* @return true if this is a well-supported version of windows.
* (not 95, 98, nt or me)
*/
public static boolean isGoodWindows() {
return isWindows() && isHighLoadOS();
}
/**
* Return whether the current operating system supports moving files
* to the trash.
*/
public static boolean supportsTrash() {
return isWindows() || isMacOSX();
}
/**
* Returns the maximum path system of file system of the current OS
* or a conservative approximation.
*/
public static int getMaxPathLength() {
if (isWindows()) {
// From Windows NT onwards, Windows applications can create or
// manipulate path lengths of 260 characters, where 259 are
// actual characters + 1 NULL character. Where path is denoted
// by the path, filename and extension plus 1 null character.
//
// NTFS can actually support 32767 characters in the paths
// but one must prepend \\?\ to the file paths. This tells the
// APIs to not to enforce 260 character limit.
return 259;
}
else if (isLinux()) {
return 4096 - 1;
}
else {
return 1024 - 1;
}
}
}