oshi.software.os.linux

Class LinuxOperatingSystem

java.lang.Object

oshi.software.common.AbstractOperatingSystem

oshi.software.os.linux.LinuxOperatingSystem

All Implemented Interfaces:

Serializable, OperatingSystem

public class LinuxOperatingSystem
extends AbstractOperatingSystem

Linux is a family of free operating systems most commonly used on personal computers.

Author:

widdis[at]gmail[dot]com

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from interface oshi.software.os.OperatingSystem

OperatingSystem.ProcessSort

Field Summary

Fields

Modifier and Type	Field and Description
protected String	codeName
protected String	versionId

Fields inherited from class oshi.software.common.AbstractOperatingSystem

bitness, family, manufacturer, version

Constructor Summary

Constructors

Constructor and Description
LinuxOperatingSystem()

Method Summary

Modifier and Type	Method and Description
OSProcess[]	getChildProcesses(int parentPid, int limit, OperatingSystem.ProcessSort sort) Gets currently running child processes of provided PID.
FileSystem	getFileSystem() Instantiates a FileSystem object.
static long	getHz() Gets Jiffies per second, useful for converting ticks to milliseconds and vice versa.
NetworkParams	getNetworkParams() Instantiates a NetworkParams object.
OSProcess	getProcess(int pid) Gets information on a currently running process
int	getProcessCount() Get the number of processes currently running
OSProcess[]	getProcesses(int limit, OperatingSystem.ProcessSort sort, boolean slowFields) Gets currently running processes.
int	getProcessId() Gets the current process ID
protected static String	getReleaseFilename() Looks for a collection of possible distrib-release filenames
int	getThreadCount() Get the number of threads currently running

Methods inherited from class oshi.software.common.AbstractOperatingSystem

getBitness, getFamily, getManufacturer, getProcesses, getProcesses, getVersion, processSort, toString

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

versionId

protected String versionId

codeName

protected String codeName

Constructor Detail

LinuxOperatingSystem

public LinuxOperatingSystem()

Method Detail

getFileSystem

public FileSystem getFileSystem()

Instantiates a FileSystem object.

Returns:

A FileSystem object.

getProcesses

public OSProcess[] getProcesses(int limit,
                                OperatingSystem.ProcessSort sort,
                                boolean slowFields)

Gets currently running processes. If a positive limit is specified, returns only that number of processes; zero will return all processes. The order may be specified by the sort parameter, for example, to return the top cpu or memory consuming processes; if null, no order is guaranteed.

Parameters:

limit - Max number of results to return, or 0 to return all results

sort - If not null, determines sorting of results

slowFields - If false, skip OSProcess fields that are slow to retrieve (e.g., group information on Windows, open files on Unix and Linux). If true, include all fields, regardless of how long it takes to retrieve the data.

Returns:

An array of OSProcess objects for the specified number (or all) of currently running processes, sorted as specified. The array may contain null elements if a process terminates during iteration.

getProcess

public OSProcess getProcess(int pid)

Gets information on a currently running process

Parameters:

pid - A process ID

Returns:

An OSProcess object for the specified process id if it is running; null otherwise

getChildProcesses

public OSProcess[] getChildProcesses(int parentPid,
                                     int limit,
                                     OperatingSystem.ProcessSort sort)

Gets currently running child processes of provided PID. If a positive limit is specified, returns only that number of processes; zero will return all processes. The order may be specified by the sort parameter, for example, to return the top cpu or memory consuming processes; if null, no order is guaranteed.

Parameters:

parentPid - A process ID

limit - Max number of results to return, or 0 to return all results

sort - If not null, determines sorting of results

Returns:

An array of OSProcess objects presenting the specified number (or all) of currently running child processes of the provided PID, sorted as specified. The array may contain null elements if a process terminates during iteration.

getProcessId

public int getProcessId()

Gets the current process ID

Returns:

the Process ID of the current process

getProcessCount

public int getProcessCount()

Get the number of processes currently running

Returns:

The number of processes running

getThreadCount

public int getThreadCount()

Get the number of threads currently running

Returns:

The number of threads running

getNetworkParams

public NetworkParams getNetworkParams()

Instantiates a NetworkParams object.

Returns:

A NetworkParams object.

getReleaseFilename

protected static String getReleaseFilename()

Looks for a collection of possible distrib-release filenames

Returns:

The first valid matching filename

getHz

public static long getHz()

Gets Jiffies per second, useful for converting ticks to milliseconds and vice versa.

Returns:

Jiffies per second.