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snappy-java: A fast compression/decompression library
/*--------------------------------------------------------------------------
* Copyright 2008 Taro L. Saito
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*--------------------------------------------------------------------------*/
//--------------------------------------
// snappy-java Project
//
// OSInfo.java
// Since: May 20, 2008
//
// $URL$
// $Author$
//--------------------------------------
package org.xerial.snappy;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.HashMap;
import java.util.Locale;
/**
* Provides OS name and architecture name.
*
* @author leo
*/
public class OSInfo {
private static HashMap archMapping = new HashMap();
public static final String X86 = "x86";
public static final String X86_64 = "x86_64";
public static final String IA64_32 = "ia64_32";
public static final String IA64 = "ia64";
public static final String PPC = "ppc";
public static final String PPC64 = "ppc64";
public static final String IBMZ = "s390";
public static final String IBMZ_64 = "s390x";
public static final String AARCH_64 = "aarch64";
static {
// x86 mappings
archMapping.put(X86, X86);
archMapping.put("i386", X86);
archMapping.put("i486", X86);
archMapping.put("i586", X86);
archMapping.put("i686", X86);
archMapping.put("pentium", X86);
// x86_64 mappings
archMapping.put(X86_64, X86_64);
archMapping.put("amd64", X86_64);
archMapping.put("em64t", X86_64);
archMapping.put("universal", X86_64); // Needed for openjdk7 in Mac
// Itenium 64-bit mappings
archMapping.put(IA64, IA64);
archMapping.put("ia64w", IA64);
// Itenium 32-bit mappings, usually an HP-UX construct
archMapping.put(IA64_32, IA64_32);
archMapping.put("ia64n", IA64_32);
// PowerPC mappings
archMapping.put(PPC, PPC);
archMapping.put("power", PPC);
archMapping.put("powerpc", PPC);
archMapping.put("power_pc", PPC);
archMapping.put("power_rs", PPC);
// TODO: PowerPC 64bit mappings
archMapping.put(PPC64, PPC64);
archMapping.put("power64", PPC64);
archMapping.put("powerpc64", PPC64);
archMapping.put("power_pc64", PPC64);
archMapping.put("power_rs64", PPC64);
// IBM z mappings
archMapping.put(IBMZ, IBMZ);
// IBM z 64-bit mappings
archMapping.put(IBMZ_64, IBMZ_64);
// Aarch64 mappings
archMapping.put(AARCH_64, AARCH_64);
}
public static void main(String[] args) {
if(args.length >= 1) {
if("--os".equals(args[0])) {
System.out.print(getOSName());
return;
}
else if("--arch".equals(args[0])) {
System.out.print(getArchName());
return;
}
}
System.out.print(getNativeLibFolderPathForCurrentOS());
}
public static String getNativeLibFolderPathForCurrentOS() {
return getOSName() + "/" + getArchName();
}
public static String getOSName() {
return translateOSNameToFolderName(System.getProperty("os.name"));
}
public static boolean isAndroid() {
return System.getProperty("java.runtime.name", "").toLowerCase().contains("android");
}
static String getHardwareName() {
try {
Process p = Runtime.getRuntime().exec("uname -m");
p.waitFor();
InputStream in = p.getInputStream();
try {
int readLen = 0;
ByteArrayOutputStream b = new ByteArrayOutputStream();
byte[] buf = new byte[32];
while((readLen = in.read(buf, 0, buf.length)) >= 0) {
b.write(buf, 0, readLen);
}
return b.toString();
}
finally {
if(in != null) {
in.close();
}
}
}
catch(Throwable e) {
System.err.println("Error while running uname -m: " + e.getMessage());
return "unknown";
}
}
static String resolveArmArchType() {
if(System.getProperty("os.name").contains("Linux")) {
String armType = getHardwareName();
// armType (uname -m) can be armv5t, armv5te, armv5tej, armv5tejl, armv6, armv7, armv7l, i686
if(armType.startsWith("armv6")) {
// Raspberry PI
return "armv6";
}
else if(armType.startsWith("armv7")) {
// Generic
return "armv7";
}
// Java 1.8 introduces a system property to determine armel or armhf
// http://bugs.java.com/bugdatabase/view_bug.do?bug_id=8005545
String abi = System.getProperty("sun.arch.abi");
if(abi != null && abi.startsWith("gnueabihf")) {
return "armv7";
}
// For java7, we stil need to if run some shell commands to determine ABI of JVM
try {
// determine if first JVM found uses ARM hard-float ABI
int exitCode = Runtime.getRuntime().exec("which readelf").waitFor();
if(exitCode == 0) {
String javaHome = System.getProperty("java.home");
String[] cmdarray = {"/bin/sh", "-c", "find '" + javaHome +
"' -name 'libjvm.so' | head -1 | xargs readelf -A | " +
"grep 'Tag_ABI_VFP_args: VFP registers'"};
exitCode = Runtime.getRuntime().exec(cmdarray).waitFor();
if(exitCode == 0) {
return "armv7";
}
}
else {
System.err.println("WARNING! readelf not found. Cannot check if running on an armhf system, " +
"armel architecture will be presumed.");
}
}
catch(IOException e) {
// ignored: fall back to "arm" arch (soft-float ABI)
}
catch(InterruptedException e) {
// ignored: fall back to "arm" arch (soft-float ABI)
}
}
// Use armv5, soft-float ABI
return "arm";
}
public static String getArchName() {
String osArch = System.getProperty("os.arch");
// For Android
if(isAndroid()) {
osArch = "android-arm";
}
else if(osArch.startsWith("arm")) {
osArch = resolveArmArchType();
}
else {
String lc = osArch.toLowerCase(Locale.US);
if(archMapping.containsKey(lc))
return archMapping.get(lc);
}
return translateArchNameToFolderName(osArch);
}
static String translateOSNameToFolderName(String osName) {
if(osName.contains("Windows")) {
return "Windows";
}
else if(osName.contains("Mac")) {
return "Mac";
}
else if(osName.contains("Linux")) {
return "Linux";
}
else if(osName.contains("AIX")) {
return "AIX";
}
else {
return osName.replaceAll("\\W", "");
}
}
static String translateArchNameToFolderName(String archName) {
return archName.replaceAll("\\W", "");
}
}
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