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/**
* Oshi (https://github.com/dblock/oshi)
*
* Copyright (c) 2010 - 2016 The Oshi Project Team
*
* 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
*
* Maintainers:
* dblock[at]dblock[dot]org
* widdis[at]gmail[dot]com
* enrico.bianchi[at]gmail[dot]com
*
* Contributors:
* https://github.com/dblock/oshi/graphs/contributors
*/
package oshi.software.os.linux;
import java.io.File;
import java.util.List;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import oshi.software.common.AbstractOSVersionInfoEx;
import oshi.util.ExecutingCommand;
import oshi.util.FileUtil;
public class LinuxOSVersionInfoEx extends AbstractOSVersionInfoEx {
private static final long serialVersionUID = 1L;
private static final Logger LOG = LoggerFactory.getLogger(LinuxOSVersionInfoEx.class);
public LinuxOSVersionInfoEx() {
this(null, null);
}
protected LinuxOSVersionInfoEx(String versionId, String codeName) {
setVersion(versionId);
setCodeName(codeName);
if (getVersion() == null) {
setVersionFromReleaseFiles();
}
if (getCodeName() == null) {
setCodeName("");
}
List procVersion = null;
procVersion = FileUtil.readFile("/proc/version");
if (!procVersion.isEmpty()) {
String[] split = procVersion.get(0).split("\\s+");
for (String s : split) {
if (!s.equals("Linux") && !s.equals("version")) {
setBuildNumber(s);
return;
}
}
}
setBuildNumber("");
}
/*
* Code below this point is largely a copy of LinuxOperatingSystem class
* except family is not set. If this class has been called from that class
* then no new information would be added here. This is provided in the odd
* event someone wants to instantiate this class without having first gone
* through the LinuxOperatingSystem
*/
private void setVersionFromReleaseFiles() {
// There are two competing options for family/version information.
// Newer systems are adopting a standard /etc/os-release file:
// https://www.freedesktop.org/software/systemd/man/os-release.html
//
// Some systems are still using the lsb standard which parses a
// variety of /etc/*-release files and is most easily accessed via
// the commandline lsb_release -a, see here:
// http://linux.die.net/man/1/lsb_release
// In this case, the /etc/lsb-release file (if it exists) has
// optional overrides to the information in the /etc/distrib-release
// files, which show: "Distributor release x.x (Codename)"
//
// Attempt to read /etc/os-release file.
if (readOsRelease()) {
// If successful, we're done. The version and possibly codeName
// are set
return;
}
// Attempt to execute the `lsb_release` command
if (execLsbRelease()) {
// If successful, we're done. The version and possibly codeName
// are set
return;
}
// The above two options should hopefully work on most
// distributions. If not, we keep having fun.
// Attempt to read /etc/lsb-release file
if (readLsbRelease()) {
// If successful, we're done. The version and possibly codeName
// are set
return;
}
// If we're still looking, we search for any /etc/*-release (or
// similar) filename, for which the first line should be of the
// "Distributor release x.x (Codename)" format or possibly a
// "Distributor VERSION x.x (Codename)" format
String etcDistribRelease = LinuxOperatingSystem.getReleaseFilename();
if (readDistribRelease(etcDistribRelease)) {
// If successful, we're done. The version and possibly codeName
// are set
return;
}
// Finally, if all else fails
if (getVersion() == null) {
setVersion(System.getProperty("os.version"));
}
}
/**
* Attempts to read /etc/os-release
*
* @return true if file successfully read and NAME= found
*/
private boolean readOsRelease() {
if (new File("/etc/os-release").exists()) {
List osRelease = FileUtil.readFile("/etc/os-release");
// Search for NAME=
for (String line : osRelease) {
if (line.startsWith("VERSION=")) {
LOG.debug("os-release: {}", line);
// remove beginning and ending '"' characters, etc from
// VERSION="14.04.4 LTS, Trusty Tahr" (Ubuntu style)
// or VERSION="17 (Beefy Miracle)" (os-release doc style)
line = line.replace("VERSION=", "").replaceAll("^\"|\"$", "").trim();
String[] split = line.split("[()]");
if (split.length <= 1) {
// If no parentheses, check for Ubuntu's comma format
split = line.split(", ");
}
if (split.length > 0) {
this.version = split[0].trim();
}
if (split.length > 1) {
this.codeName = split[1].trim();
}
} else if (line.startsWith("VERSION_ID=") && this.version == null) {
LOG.debug("os-release: {}", line);
// remove beginning and ending '"' characters, etc from
// VERSION_ID="14.04"
this.version = line.replace("VERSION_ID=", "").replaceAll("^\"|\"$", "").trim();
}
}
}
return this.version != null;
}
/**
* Attempts to execute `lsb_release -a`
*
* @return true if the command successfully executed and Release: or
* Description: found
*/
private boolean execLsbRelease() {
List osRelease = ExecutingCommand.runNative("lsb_release -a");
// If description is of the format Distrib release x.x (Codename)
// that is primary, otherwise use Distributor ID: which returns the
// distribution concatenated, e.g., RedHat instead of Red Hat
for (String line : osRelease) {
if (line.startsWith("Description:")) {
LOG.debug("lsb_release -a: {}", line);
line = line.replace("Description:", "").trim();
if (line.contains(" release ")) {
this.version = parseRelease(line, " release ");
}
} else if (line.startsWith("Release:") && this.version == null) {
LOG.debug("lsb_release -a: {}", line);
this.version = line.replace("Release:", "").trim();
} else if (line.startsWith("Codename:") && this.codeName == null) {
LOG.debug("lsb_release -a: {}", line);
this.codeName = line.replace("Codename:", "").trim();
}
}
return this.version != null;
}
/**
* Attempts to read /etc/lsb-release
*
* @return true if file successfully read and DISTRIB_RELEASE or
* DISTRIB_DESCRIPTION found
*/
private boolean readLsbRelease() {
if (new File("/etc/lsb-release").exists()) {
List osRelease = FileUtil.readFile("/etc/lsb-release");
// Search for NAME=
for (String line : osRelease) {
if (line.startsWith("DISTRIB_DESCRIPTION=")) {
LOG.debug("lsb-release: {}", line);
line = line.replace("DISTRIB_DESCRIPTION=", "").replaceAll("^\"|\"$", "").trim();
if (line.contains(" release ")) {
this.version = parseRelease(line, " release ");
}
} else if (line.startsWith("DISTRIB_RELEASE=") && this.version == null) {
LOG.debug("lsb-release: {}", line);
this.version = line.replace("DISTRIB_RELEASE=", "").replaceAll("^\"|\"$", "").trim();
} else if (line.startsWith("DISTRIB_CODENAME=") && this.codeName == null) {
LOG.debug("lsb-release: {}", line);
this.codeName = line.replace("DISTRIB_CODENAME=", "").replaceAll("^\"|\"$", "").trim();
}
}
}
return this.version != null;
}
/**
* Attempts to read /etc/distrib-release (for some value of distrib)
*
* @return true if file successfully read and " release " or " VERSION "
* found
*/
private boolean readDistribRelease(String filename) {
if (new File(filename).exists()) {
List osRelease = FileUtil.readFile(filename);
// Search for Distrib release x.x (Codename)
for (String line : osRelease) {
LOG.debug("{}: {}", filename, line);
if (line.contains(" release ")) {
this.version = parseRelease(line, " release ");
// If this parses properly we're done
break;
} else if (line.contains(" VERSION ")) {
this.version = parseRelease(line, " VERSION ");
// If this parses properly we're done
break;
}
}
}
return this.version != null;
}
/**
* Helper method to parse version description line style
*
* @param line
* a String of the form "Distributor release x.x (Codename)"
* @param splitLine
* A regex to split on, e.g. " release "
* @return the parsed version (codeName may have also been set)
*/
private String parseRelease(String line, String splitLine) {
String[] split = line.split(splitLine);
if (split.length > 1) {
split = split[1].split("[()]");
if (split.length > 0) {
this.version = split[0].trim();
}
if (split.length > 1) {
this.codeName = split[1].trim();
}
}
return this.version;
}
}
