@ohos.process (Obtaining Process Information)

NOTE

The initial APIs of this module are supported since API version 7. Newly added APIs will be marked with a superscript to indicate their earliest API version.

Modules to Import

import process from '@ohos.process';

Attributes

System capability: SystemCapability.Utils.Lang

EventListener

System capability: SystemCapability.Utils.Lang

process.isIsolatedProcess⁸⁺

isIsolatedProcess(): boolean

Checks whether this process is isolated.

System capability: SystemCapability.Utils.Lang

Return value

Example

let result = process.isIsolatedProcess();

process.is64Bit⁸⁺

is64Bit(): boolean

Checks whether this process is running in a 64-bit environment.

System capability: SystemCapability.Utils.Lang

Return value

Example

let result = process.is64Bit();

process.getStartRealtime⁸⁺

getStartRealtime(): number

Obtains the duration, in milliseconds, from the time the system starts to the time the process starts.

System capability: SystemCapability.Utils.Lang

Return value

Example

let realtime = process.getStartRealtime();

process.getPastCpuTime⁸⁺

getPastCpuTime(): number

Obtains the CPU time (in milliseconds) from the time the process starts to the current time.

System capability: SystemCapability.Utils.Lang

Return value

Example

let result = process.getPastCpuTime() ;

process.abort

abort(): void

Aborts a process and generates a core file. This method will cause a process to exit immediately. Exercise caution when using this method.

System capability: SystemCapability.Utils.Lang

Example

process.abort();

process.uptime

uptime(): number

Obtains the running time of this process.

System capability: SystemCapability.Utils.Lang

Return value

Example

let time = process.uptime();

process.kill^(deprecated)

kill(signal: number, pid: number): boolean

Sends a signal to the specified process to terminate it.

NOTE

This API is supported since API version 7 and deprecated since API version 9. You are advised to use kill⁹⁺ instead.

System capability: SystemCapability.Utils.Lang

Parameters

Return value

Example

let pres = process.pid
let result = process.kill(28, pres)

process.exit^(deprecated)

exit(code: number): void

Terminates this process.

Exercise caution when using this API. After this API is called, the application exits. If the input parameter is not 0, data loss or exceptions may occur.

NOTE

This API is supported since API version 7 and deprecated since API version 9. You are advised to use exit⁹⁺ instead.

System capability: SystemCapability.Utils.Lang

Parameters

Example

process.exit(0);

process.getUidForName^(deprecated)

getUidForName(v: string): number

Obtains the process UID based on the process name.

NOTE

This API is supported since API version 8 and deprecated since API version 9. You are advised to use getUidForName⁹⁺ instead.

System capability: SystemCapability.Utils.Lang

Parameters

Return value

Example

let pres = process.getUidForName("tool")

process.getThreadPriority^(deprecated)

getThreadPriority(v: number): number

Obtains the thread priority based on the specified TID.

NOTE

This API is supported since API version 8 and deprecated since API version 9. You are advised to use getThreadPriority⁹⁺ instead.

System capability: SystemCapability.Utils.Lang

Parameters

Return value

Example

let tid = process.tid;
let pres = process.getThreadPriority(tid);

process.isAppUid^(deprecated)

isAppUid(v: number): boolean

Checks whether a UID belongs to this application.

NOTE

This API is supported since API version 8 and deprecated since API version 9. You are advised to use isAppUid⁹⁺ instead.

System capability: SystemCapability.Utils.Lang

Parameters

Return value

Example

let result = process.isAppUid(688);

process.getSystemConfig^(deprecated)

getSystemConfig(name: number): number

Obtains the system configuration.

NOTE

This API is supported since API version 8 and deprecated since API version 9. You are advised to use getSystemConfig⁹⁺ instead.

System capability: SystemCapability.Utils.Lang

Parameters

Return value

Example

let _SC_ARG_MAX = 0
let pres = process.getSystemConfig(_SC_ARG_MAX)

process.getEnvironmentVar^(deprecated)

getEnvironmentVar(name: string): string

Obtains the value of an environment variable.

NOTE

This API is supported since API version 8 and deprecated since API version 9. You are advised to use getEnvironmentVar⁹⁺ instead.

System capability: SystemCapability.Utils.Lang

Parameters

Return value

Example

let pres = process.getEnvironmentVar("PATH")

ProcessManager⁹⁺

Provides APIs for throwing exceptions during the addition of a process.

A ProcessManager object is obtained through its own constructor.

isAppUid⁹⁺

isAppUid(v: number): boolean

Checks whether a UID belongs to this application.

System capability: SystemCapability.Utils.Lang

Parameters

Return value

Example

let pro = new process.ProcessManager();
let result = pro.isAppUid(688);

getUidForName⁹⁺

getUidForName(v: string): number

Obtains the process UID based on the process name.

System capability: SystemCapability.Utils.Lang

Parameters

Return value

Example

let pro = new process.ProcessManager();
let pres = pro .getUidForName("tool");

getThreadPriority⁹⁺

getThreadPriority(v: number): number

Obtains the thread priority based on the specified TID.

System capability: SystemCapability.Utils.Lang

Parameters

Return value

Example

let pro = new process.ProcessManager();
let tid = process.tid;
let pres = pro.getThreadPriority(tid);

getSystemConfig⁹⁺

getSystemConfig(name: number): number

Obtains the system configuration.

System capability: SystemCapability.Utils.Lang

Parameters

Return value

Example

let pro = new process.ProcessManager();
let _SC_ARG_MAX = 0;
let pres = pro.getSystemConfig(_SC_ARG_MAX);

getEnvironmentVar⁹⁺

getEnvironmentVar(name: string): string

Obtains the value of an environment variable.

System capability: SystemCapability.Utils.Lang

Parameters

Return value

Example

let pro = new process.ProcessManager();
let pres = pro.getEnvironmentVar("PATH");

exit⁹⁺

exit(code: number): void

Terminates this process.

Exercise caution when using this API. After this API is called, the application exits. If the input parameter is not 0, data loss or exceptions may occur.

System capability: SystemCapability.Utils.Lang

Parameters

Example

let pro = new process.ProcessManager();
pro.exit(0);

kill⁹⁺

kill(signal: number, pid: number): boolean

Sends a signal to the specified process to terminate it.

System capability: SystemCapability.Utils.Lang

Parameters

Return value

Example

let pro = new process.ProcessManager();
let pres = process.pid;
let result = pro.kill(28, pres);

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