| name | string | Yes | Name of the target app account. |
| name | string | Yes | Name of the app account to add. |
| callback | AsyncCallback<void> | Yes | Callback invoked to return the result. If the operation is successful, **err** is **null**. Otherwise, **err** is an error object.|
Adds an app account name and additional information. This API uses an asynchronous callback to return the result. This API uses a promise to return the result.
> **NOTE**
>
> **NOTE**<br>
> This API is supported since API version 7 and deprecated since API version 9. You are advised to use [createAccount](#createaccount9-2).
| name | string | Yes | Name of the target app account. |
| name | string | Yes | Name of the app account to delete. |
| callback | AsyncCallback<void> | Yes | Callback invoked to return the result. If the operation is successful, **err** is **null**. Otherwise, **err** is an error object.|
**Example**
...
...
@@ -2866,7 +2897,7 @@ Deletes an app account. This API uses a promise to return the result.
| Name | Type | Mandatory | Description |
| ---- | ------ | ---- | ----------- |
| name | string | Yes | Name of the target app account.|
| name | string | Yes | Name of the app account to delete.|
**Return value**
...
...
@@ -3751,18 +3782,23 @@ Authenticates an app account with customized options. This API uses an asynchron
| KEY_BOOLEAN_RESULT<sup>9+</sup> | "booleanResult" | Return value of the Boolean type. |
## ResultCode<sup>8+</sup>
## ResultCode<sup>(deprecated)</sup>
Enumerates the result codes.
> **NOTE**
> This enum is supported since API version 8 and deprecated since API version 9. From API version 9, error codes are used. For details about the error codes, see [App Account Error Codes](../errorcodes/errorcode-app-account.md).
@@ -5,6 +5,7 @@ The **fs** module provides APIs for file operations, including basic file manage
> **NOTE**
>
> - The initial APIs of this module are supported since API version 9. Newly added APIs will be marked with a superscript to indicate their earliest API version.
>
> - The APIs of this module support processing of error codes. For details, see [File Management Error Codes](../errorcodes/errorcode-filemanagement.md).
## Modules to Import
...
...
@@ -15,7 +16,7 @@ import fs from '@ohos.file.fs';
## Guidelines
Before using the APIs provided by this module to perform operations on files or directories, obtain the path of the application sandbox as follows:
Before using the APIs provided by this module to perform operations on files or directories, obtain the path of the file or directory in the application sandbox as follows:
**Stage Model**
...
...
@@ -147,7 +148,7 @@ Checks whether a file exists. This API uses a promise to return the result.
| path | string | Yes | Path of the file in the application sandbox or URI of the file. |
| mode | number | No | [Mode](#openmode) for opening the file. You must specify one of the following options. By default, the file is open in read-only mode.<br>- **OpenMode.READ_ONLY(0o0)**: Open the file in read-only mode.<br>- **OpenMode.WRITE_ONLY(0o1)**: Open the file in write-only mode.<br>- **OpenMode.READ_WRITE(0o2)**: Open the file in read/write mode.<br>You can also specify the following options, separated by a bitwise OR operator (|). By default, no additional options are given.<br>- **OpenMode.CREATE(0o100)**: If the file does not exist, create it.<br>- **OpenMode.TRUNC(0o1000)**: If the file exists and is open in write-only or read/write mode, truncate the file length to 0.<br>- **OpenMode.APPEND(0o2000)**: Open the file in append mode. New data will be added to the end of the file.<br>- **OpenMode.NONBLOCK(0o4000)**: If **path** points to a named pipe (also known as a FIFO), block special file, or character special file, perform non-blocking operations on the open file and in subsequent I/Os.<br>- **OpenMode.DIR(0o200000)**: If **path** does not point to a directory, throw an exception.<br>- **OpenMode.NOFOLLOW(0o400000)**: If **path** points to a symbolic link, throw an exception.<br>- **OpenMode.SYNC(0o4010000)**: Open the file in synchronous I/O mode.|
| mode | number | No | [Mode](#openmode) for opening the file. You must specify one of the following options. By default, the file is open in read-only mode.<br>- **OpenMode.READ_ONLY(0o0)**: Open the file in read-only mode.<br>- **OpenMode.WRITE_ONLY(0o1)**: Open the file in write-only mode.<br>- **OpenMode.READ_WRITE(0o2)**: Open the file in read/write mode.<br>You can also specify the following options, separated by a bitwise OR operator (|). By default, no additional options are given.<br>- **OpenMode.CREATE(0o100)**: If the file does not exist, create it.<br>- **OpenMode.TRUNC(0o1000)**: If the file exists and is open in write-only or read/write mode, truncate the file length to 0.<br>- **OpenMode.APPEND(0o2000)**: Open the file in append mode. New data will be added to the end of the file.<br>- **OpenMode.NONBLOCK(0o4000)**: If **path** points to a named pipe (also known as a FIFO), block special file, or character special file, perform non-blocking operations on the open file and in subsequent I/Os.<br>- **OpenMode.DIR(0o200000)**: If **path** does not point to a directory, throw an exception.<br>- **OpenMode.NOFOLLOW(0o400000)**: If **path** points to a symbolic link, throw an exception.<br>- **OpenMode.SYNC(0o4010000)**: Open the file in synchronous I/O mode.|
**Return value**
...
...
@@ -1079,7 +1080,7 @@ Reads the text content of a file. This API uses an asynchronous callback to retu
| filePath | string | Yes | Path of the file in the application sandbox. |
| options | Object | No | The options are as follows:<br>- **offset** (number): position of the data to read in the file. This parameter is optional. By default, data is read from the current position.<br>- **length** (number): length of the data to read. This parameter is optional. The default value is the file length.<br>- **encoding** (string): format of the string to be encoded. The default value is **'utf-8'**, which is the only value supported.|
| callback | AsyncCallback<string> | Yes | Callback used to return the content read. |
| callback | AsyncCallback<string> | Yes | Callback invoked to return the content read. |
**Example**
...
...
@@ -1169,7 +1170,7 @@ Obtains information about a symbolic link. This API uses an asynchronous callbac
@@ -1560,6 +1561,239 @@ Synchronously creates a symbolic link based on a file path.
fs.symlinkSync(srcFile,dstFile);
```
## fs.listFile
listFile(path: string, options?: {
recursion?: boolean;
listNum?: number;
filter?: Filter;
}): Promise<string[]>;
Lists all files in a directory. This API uses a promise to return the result.<br>This API supports recursive listing of all files (including files in subdirectories) and file filtering.
| recursion | boolean | No | Whether to list all files in subdirectories recursively. The default value is **false**.|
| listNum | number | No | Number of file names to list. The default value **0** means to list all files.|
| filter | [Filter](#filter) | No | File filtering options. Currently, only the match by file name extension, fuzzy search by file name, and filter by file size or latest modification time are supported.|
**Return value**
| Type | Description |
| --------------------- | ---------- |
| Promise<string[]> | Promise used to return the files names listed.|
**Example**
```js
letoptions={
"recursion":false,
"listNum":0,
"filter":{
"suffix":[".png",".jpg",".jpeg"],
"displayName":["%abc","efg%"],
"fileSizeOver":1024,
"lastModifiedAfter":newDate().getTime(),
}
};
fs.listFile(pathDir,options).then((filenames)=>{
console.info("listFile succeed");
for(leti=0;i<filenames.size;i++){
console.info("fileName: %s",filenames[i]);
}
}).catch((err)=>{
console.info("list file failed with error message: "+err.message+", error code: "+err.code);
});
```
## fs.listFile
listFile(path: string, options?: {
recursion?: boolean;
listNum?: number;
filter?: Filter;
}, callback: AsyncCallback<string[]>): void;
Lists all files in a directory. This API uses an asynchronous callback to return the result.<br>This API supports recursive listing of all files (including files in subdirectories) and file filtering.
| recursion | boolean | No | Whether to list all files in subdirectories recursively. The default value is **false**.|
| listNum | number | No | Number of file names to list. The default value **0** means to list all files.|
| filter | [Filter](#filter) | No | File filtering options. Currently, only the match by file name extension, fuzzy search by file name, and filter by file size or latest modification time are supported.|
**Example**
```js
letoptions={
"recursion":false,
"listNum":0,
"filter":{
"suffix":[".png",".jpg",".jpeg"],
"displayName":["%abc","efg%"],
"fileSizeOver":1024,
"lastModifiedAfter":newDate().getTime(),
}
};
fs.listFile(pathDir,options,(err,filenames)=>{
if(err){
console.info("list file failed with error message: "+err.message+", error code: "+err.code);
}else{
console.info("listFile succeed");
for(leti=0;i<filenames.size;i++){
console.info("filename: %s",filenames[i]);
}
}
});
```
## listFileSync
listFileSync(path: string, options?: {
recursion?: boolean;
listNum?: number;
filter?: Filter;
}): string[];
Lists all files in a directory synchronously. This API supports recursive listing of all files (including files in subdirectories) and file filtering.
| recursion | boolean | No | Whether to list all files in subdirectories recursively. The default value is **false**.|
| listNum | number | No | Number of file names to list. The default value **0** means to list all files.|
| filter | [Filter](#filter) | No | File filtering options. Currently, only the match by file name extension, fuzzy search by file name, and filter by file size or latest modification time are supported.|
| src | string | Yes | Path of the file to move in the application sandbox.|
| dest | string | Yes | Destination path of the file in the application sandbox.|
| mode | number | No | Whether to overwrite the file of the same name in the destination directory. The value **0** means to overwrite the file of the same name in the destination directory. The value **1** means to throw an exception if a file of the same name exists in the destination directory. The default value is **0**.|
**Example**
```js
fs.moveFile(srcPath,destPath,0).then(()=>{
console.info("move file succeed");
}).catch((err)=>{
console.info("move file failed with error message: "+err.message+", error code: "+err.code);
| src | string | Yes | Path of the file to move in the application sandbox.|
| dest | string | Yes | Destination path of the file in the application sandbox.|
| mode | number | No | Whether to overwrite the file of the same name in the destination directory. The value **0** means to overwrite the file of the same name in the destination directory. The value **1** means to throw an exception if a file of the same name exists in the destination directory. The default value is **0**.|
| callback | AsyncCallback<void> | Yes | Callback invoked when the file is moved. |
**Example**
```js
fs.moveFile(srcPath,destPath,0,(err)=>{
if(err){
console.info("move file failed with error message: "+err.message+", error code: "+err.code);
| src | string | Yes | Path of the file to move in the application sandbox.|
| dest | string | Yes | Destination path of the file in the application sandbox.|
| mode | number | No | Whether to overwrite the file of the same name in the destination directory. The value **0** means to overwrite the file of the same name in the destination directory. The value **1** means to throw an exception if a file of the same name exists in the destination directory. The default value is **0**.|
**Example**
```js
fs.moveFileSync(srcPath,destPath,0);
console.info("move file succeed");
```
## fs.mkdtemp
mkdtemp(prefix: string): Promise<string>
...
...
@@ -2354,6 +2588,104 @@ Represents a **File** object opened by **open()**.
| ---- | ------ | ---- | ---- | ------- |
| fd | number | Yes | No | FD of the file.|
### lock
lock(exclusive?: boolean): Promise<void>;
Applies an exclusive lock or a shared lock on this file in blocking mode. This API uses a promise to return the result.
The **storageStatistics** module provides APIs for obtaining storage space information, including the space of built-in and plug-in memory cards, space occupied by different types of data, and space of application data.
> **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 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 of this module support processing of error codes. For details, see [File Management Error Codes](../errorcodes/errorcode-filemanagement.md).
Asynchronously obtains the available space of the specified volume. This API uses a callback to return the result.
Obtains the available space (in bytes) of the specified volume in an external storage device. This API uses an asynchronous callback to return the result.
This is a system API and cannot be called by third-party applications.
This is a system API.
**Parameters**
| Name | Type | Mandatory| Description|
| ---------- | ------ | ---- | ---- |
| userId | number | No | User ID.<br>Value:<br>- Set this parameter to the ID of the user to be queried.<br>- If no value is specified, information about the current user is queried.|
| userId | number | Yes | User ID.|
**Return value**
...
...
@@ -479,7 +534,7 @@ This is a system API and cannot be called by third-party applications.
| userId | number | No | User ID.<br>Value:<br>- Set this parameter to the ID of the user to be queried.<br>- If no value is specified, information about the current user is queried. |
| userId | number | Yes | User ID.|
| callback | AsyncCallback<[StorageStats](#storagestats9)> | Yes | Callback invoked to return the information obtained.|
The volumeManager module provides APIs for volume and disk management, including obtaining volume information, mounting or unmounting volumes, partitioning disks, and formatting volumes.
> **NOTE**
>
> - The initial APIs of this module are supported since API version 9.
> - The APIs of this module are system APIs and cannot be called by third-party applications.
> - The initial APIs of this module are supported since API version 9. Newly added APIs will be marked with a superscript to indicate their earliest API version.
> - The APIs provided by this module are system APIs.
> - The APIs of this module support processing of error codes. For details, see [File Management Error Codes](../errorcodes/errorcode-filemanagement.md).
Obtains information about the device root nodes of the file management service type connected to the **Helper** object. This API uses an asynchronous callback to return the result. The callback has a **RootIterator** object, which returns [RootInfo](#rootinfo) through [next()](#rootiteratornext).
Obtains information about the device root nodes of the file management service type connected to the **Helper** object. This API uses an asynchronous callback to return the result.
The callback has a **RootIterator** object, which returns [RootInfo](#rootinfo) through [next()](#rootiteratornext).
@@ -218,9 +220,9 @@ Obtains information about the device root nodes of the file management service t
**Parameters**
| Name| Type| Mandatory| Description|
| --- | --- | --- | -- |
| callback | AsyncCallback<RootIterator> | Yes| Promise used to return the **RootIterator** object obtained.|
| Name| Type| Mandatory| Description|
| --- | --- | --- | -- |
| callback | AsyncCallback<RootIterator> | Yes| Promise used to return the **RootIterator** object obtained.|
**Example**
...
...
@@ -253,7 +255,7 @@ Obtains information about the device root nodes of the file management service t
listFile(filter?: Filter) : FileIterator
Synchronously obtains the **FileIterator** object of the first-level files (file folder) matching the conditions of the filter from the device root node. The **FileIterator** object then returns [FileInfo](#fileinfo) by using [next()](#fileiteratornext).
Synchronously obtains the **FileIterator** object of the first-level files (file directory) matching the conditions of the filter from the device root node. The **FileIterator** object then returns [FileInfo](#fileinfo) by using [next()](#fileiteratornext).
@@ -354,7 +356,7 @@ Recursively obtains the **FileIterator** object of the files matching the condit
listFile(filter?: Filter) : FileIterator
Synchronously obtains the **FileIterator** object of the next-level files (file folders) matching the conditions of the filter from a directory. The **FileIterator** object then returns [FileInfo](#fileinfo) by using [next()](#fileiteratornext).
Synchronously obtains the **FileIterator** object of the next-level files (file directories) matching the conditions of the filter from a directory. The **FileIterator** object then returns [FileInfo](#fileinfo) by using [next()](#fileiteratornext).
@@ -986,10 +988,10 @@ Checks whether a file or folder exists. This API uses an asynchronous callback t
**Parameters**
| Name| Type| Mandatory| Description|
| --- | --- | --- | -- |
| sourceFileUri | string | Yes| URI of the file or folder.|
| callback | AsyncCallback<boolean> | Yes| Promise used to return the result.|
| Name| Type| Mandatory| Description|
| --- | --- | --- | -- |
| sourceFileUri | string | Yes| URI of the file or directory.|
| callback | AsyncCallback<boolean> | Yes| Promise used to return the result.|
**Example**
...
...
@@ -1029,13 +1031,13 @@ Obtains the next-level device root directory. **RootIterator** is an iterator ob
| Type| Description|
| --- | -- |
| {value: RootInfo, done: boolean} | Root directory information obtained. This API traverses the folder until **done** returns **true**. The **value** field contains the root directory information.|
| {value: RootInfo, done: boolean} | Root directory information obtained. This API traverses the directory until **done** returns **true**. The **value** field contains the root directory information.|
## FileIterator.next
next( ) : { value: FileInfo, done: boolean }
Obtains the information about the next-level file or folder. **FileIterator** is an iterator object of a folder.
Obtains the information about the next-level file or directory. **FileIterator** is an iterator object of a directory.
@@ -1045,7 +1047,7 @@ Obtains the information about the next-level file or folder. **FileIterator** is
| Type| Description|
| --- | -- |
| {value: FileInfo, done: boolean} | File or folder information obtained. This API traverses the specified folder until **done** returns **true**. The **value** field contains the file or folder information obtained.|
| {value: FileInfo, done: boolean} | File or directory information obtained. This API traverses the specified directory until **done** returns **true**. The **value** field contains the file or directory information obtained.|
## RootInfo
...
...
@@ -1066,7 +1068,7 @@ Represents the root attribute information and interface capabilities of a device
## FileInfo
Represents the file or folder attribute information and interface capabilities.
Represents the file or directory attribute information and interface capabilities.
