harmony 鸿蒙@ohos.statfs (statfs)
@ohos.statfs (statfs)
The statfs module provides APIs for obtaining file system information, including the total number of bytes and the number of idle bytes of the file system.
NOTE
The initial APIs of this module are supported since API version 8. Newly added APIs will be marked with a superscript to indicate their earliest API version.
The APIs provided by this module are deprecated since API version 9. You are advised to use @ohos.file.statvfs.
Modules to Import
import statfs from '@ohos.statfs';
statfs.getFreeBytes
getFreeBytes(path:string):Promise<number>
Obtains the number of free bytes of the specified file system in asynchronous mode. This API uses a promise to return the result.
System capability: SystemCapability.FileManagement.File.FileIO
Parameters
Name | Type | Mandatory | Description |
---|---|---|---|
path | string | Yes | File path of the file system. |
Return value
Type | Description |
---|---|
Promise<number> | Promise used to return the number of free bytes obtained. |
Example
import { BusinessError } from '@ohos.base';
let path = "/dev";
statfs.getFreeBytes(path).then((number: number) => {
console.info("getFreeBytes promise successfully:" + number);
}).catch((err: BusinessError) => {
console.info("getFreeBytes failed with error:" + JSON.stringify(err));
});
statfs.getFreeBytes
getFreeBytes(path:string, callback:AsyncCallback<number>): void
Obtains the number of free bytes of the specified file system in asynchronous mode. This API uses a callback to return the result.
System capability: SystemCapability.FileManagement.File.FileIO
Parameters
Name | Type | Mandatory | Description |
---|---|---|---|
path | string | Yes | File path of the file system. |
callback | AsyncCallback<number> | Yes | Callback invoked to return the number of free bytes obtained. |
Example
import featureAbility from '@ohos.ability.featureAbility';
let context = featureAbility.getContext();
context.getFilesDir().then(function (path) {
statfs.getFreeBytes(path, function (err, number) {
console.info("getFreeBytes callback successfully:" + number);
});
});
statfs.getTotalBytes
getTotalBytes(path: string): Promise<number>
Obtains the total number of bytes of the specified file system in asynchronous mode. This API uses a promise to return the result.
System capability: SystemCapability.FileManagement.File.FileIO
Parameters
Name | Type | Mandatory | Description |
---|---|---|---|
path | string | Yes | File path of the file system. |
Return value
Type | Description |
---|---|
Promise<number> | Promise used to return the total number of bytes obtained. |
Example
import { BusinessError } from '@ohos.base';
let path = "/dev";
statfs.getTotalBytes(path).then((number: number) => {
console.info("getTotalBytes promise successfully:" + number);
}).catch((err: BusinessError) => {
console.info("getTotalBytes failed with error:" + JSON.stringify(err));
});
statfs.getTotalBytes
getTotalBytes(path: string, callback: AsyncCallback<number>): void
Obtains the total number of bytes of the specified file system in asynchronous mode. This API uses a callback to return the result.
System capability: SystemCapability.FileManagement.File.FileIO
Parameters
Name | Type | Mandatory | Description |
---|---|---|---|
path | string | Yes | File path of the file system. |
callback | AsyncCallback<number> | Yes | Callback invoked to return the total number of bytes obtained. |
Example
import featureAbility from '@ohos.ability.featureAbility';
let context = featureAbility.getContext();
context.getFilesDir().then(function (path) {
statfs.getTotalBytes(path, function(err, number) {
console.info("getTotalBytes callback successfully:" + number);
});
});
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