OsHelperConstants

java.lang.Object
- ohos.system.OsHelperConstants

```
public final class OsHelperConstants
extends Object
```
Provides methods and constants related to the OsHelper class.

从以下版本开始:

3

字段概要

字段
限定符和类型	字段	说明
`static int`	`_SC_CLK_TCK`	Used in the `OsHelper#getSystemConfig(int)` method for querying the number of clock ticks per second.
`static int`	`EEXIST`	Error value indicating that the file does not exist.
`static int`	`ENOENT`	Error value indicating that the file or directory does not exist.
`static int`	`ENOSPC`	Error value indicating that there is no space available on the device.
`static int`	`EXDEV`	Error value returned when trying to establish a cross-device link.
`static int`	`F_OK`	File permission mode used to check whether a file exists.
`static int`	`PR_SET_DUMPABLE`	A flag set for a process that determines whether the process performs core dump when it receives such a default signal.
`static int`	`R_OK`	File permission mode used to check whether a file exists, and give read permissions.
`static int`	`S_IRGRP`	File permission mode to specify whether a file can be read group.
`static int`	`S_IROTH`	File permission mode to specify whether a file can be read by other users.
`static int`	`S_IRUSR`	File permission mode to specify whether a file can be read by user.
`static int`	`S_IRWXG`	File permission mode to specify whether a file can be read、written and executed by group.
`static int`	`S_IRWXO`	File permission mode to specify whether a file can be read、written and executed by others.
`static int`	`S_IRWXU`	File permission mode to specify whether a file can be read、written and executed by owner.
`static int`	`S_ISUID`	Set user id.
`static int`	`S_ISVTX`	The permissions for file holders, can renamed or deleted.
`static int`	`S_IWGRP`	File permission mode to specify whether a file can be written by user.
`static int`	`S_IWOTH`	File permission mode to specify whether a file can be written by others.
`static int`	`S_IWUSR`	File permission mode to specify whether a file can be written by owner.
`static int`	`S_IXGRP`	File permission mode to specify whether a file can be executed or searched by other members in the group to which the file owner belongs.
`static int`	`S_IXOTH`	File permission mode to specify whether a file can be executed or searched by other users.
`static int`	`S_IXUSR`	File permission mode to specify whether a file can be executed or searched by the file owner.
`static int`	`SEEK_CUR`	File offset, current position plus offset
`static int`	`SEEK_END`	Set the file offset to be offset add the size of file.
`static int`	`SEEK_SET`	File operation mode, which is used together with the offset value to specify the offset of the file operation position.
`static int`	`SO_SNDTIMEO`	A socket option to specify the sending timeout, upon which an error is reported.
`static int`	`SOL_SOCKET`	Used as a level option to obtain or set the attribute of the socket level.
`static int`	`W_OK`	File permission mode used to check whether a file exists, and give write permissions.
`static int`	`X_OK`	File permission mode used to check whether a file exists, and give execute permissions.

方法概要

所有方法静态方法具体方法
限定符和类型	方法	说明
`static boolean`	`isDir(int mode)`	Checks whether the file is a directory based on the specified file mode.
`static boolean`	`isRegularFile(int mode)`	Checks whether the file is a regular file based on the specified file mode.

从类继承的方法 java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- 字段详细资料
  - EEXIST
```
public static final int EEXIST
```
    Error value indicating that the file does not exist.
    
    从以下版本开始:
    
    3
  - ENOENT
```
public static final int ENOENT
```
    Error value indicating that the file or directory does not exist.
    
    从以下版本开始:
    
    3
  - ENOSPC
```
public static final int ENOSPC
```
    Error value indicating that there is no space available on the device.
    
    从以下版本开始:
    
    3
  - EXDEV
```
public static final int EXDEV
```
    Error value returned when trying to establish a cross-device link.
    
    从以下版本开始:
    
    3
  - F_OK
```
public static final int F_OK
```
    File permission mode used to check whether a file exists.
    
    从以下版本开始:
    
    3
  - PR_SET_DUMPABLE
```
public static final int PR_SET_DUMPABLE
```
    A flag set for a process that determines whether the process performs core dump when it receives such a default signal.
    
    从以下版本开始:
    
    3
  - R_OK
```
public static final int R_OK
```
    File permission mode used to check whether a file exists, and give read permissions.
    
    从以下版本开始:
    
    3
  - SEEK_CUR
```
public static final int SEEK_CUR
```
    File offset, current position plus offset
    
    从以下版本开始:
    
    3
  - SEEK_END
```
public static final int SEEK_END
```
    Set the file offset to be offset add the size of file.
    
    从以下版本开始:
    
    3
  - SEEK_SET
```
public static final int SEEK_SET
```
    File operation mode, which is used together with the offset value to specify the offset of the file operation position.
    
    从以下版本开始:
    
    3
  - SOL_SOCKET
```
public static final int SOL_SOCKET
```
    Used as a level option to obtain or set the attribute of the socket level.
    
    从以下版本开始:
    
    3
  - SO_SNDTIMEO
```
public static final int SO_SNDTIMEO
```
    A socket option to specify the sending timeout, upon which an error is reported.
    
    从以下版本开始:
    
    3
  - S_IRGRP
```
public static final int S_IRGRP
```
    File permission mode to specify whether a file can be read group.
    
    从以下版本开始:
    
    3
  - S_IROTH
```
public static final int S_IROTH
```
    File permission mode to specify whether a file can be read by other users.
    
    从以下版本开始:
    
    3
  - S_IRUSR
```
public static final int S_IRUSR
```
    File permission mode to specify whether a file can be read by user.
    
    从以下版本开始:
    
    3
  - S_IRWXG
```
public static final int S_IRWXG
```
    File permission mode to specify whether a file can be read、written and executed by group.
    
    从以下版本开始:
    
    3
  - S_IRWXO
```
public static final int S_IRWXO
```
    File permission mode to specify whether a file can be read、written and executed by others.
    
    从以下版本开始:
    
    3
  - S_IRWXU
```
public static final int S_IRWXU
```
    File permission mode to specify whether a file can be read、written and executed by owner.
    
    从以下版本开始:
    
    3
  - S_ISUID
```
public static final int S_ISUID
```
    Set user id.
    
    从以下版本开始:
    
    3
  - S_ISVTX
```
public static final int S_ISVTX
```
    The permissions for file holders, can renamed or deleted.
    
    从以下版本开始:
    
    3
  - S_IWGRP
```
public static final int S_IWGRP
```
    File permission mode to specify whether a file can be written by user.
    
    从以下版本开始:
    
    3
  - S_IWOTH
```
public static final int S_IWOTH
```
    File permission mode to specify whether a file can be written by others.
    
    从以下版本开始:
    
    3
  - S_IWUSR
```
public static final int S_IWUSR
```
    File permission mode to specify whether a file can be written by owner.
    
    从以下版本开始:
    
    3
  - S_IXGRP
```
public static final int S_IXGRP
```
    File permission mode to specify whether a file can be executed or searched by other members in the group to which the file owner belongs.
    
    从以下版本开始:
    
    3
  - S_IXOTH
```
public static final int S_IXOTH
```
    File permission mode to specify whether a file can be executed or searched by other users.
    
    从以下版本开始:
    
    3
  - S_IXUSR
```
public static final int S_IXUSR
```
    File permission mode to specify whether a file can be executed or searched by the file owner.
    
    从以下版本开始:
    
    3
  - W_OK
```
public static final int W_OK
```
    File permission mode used to check whether a file exists, and give write permissions.
    
    从以下版本开始:
    
    3
  - X_OK
```
public static final int X_OK
```
    File permission mode used to check whether a file exists, and give execute permissions.
    
    从以下版本开始:
    
    3
  - _SC_CLK_TCK
```
public static final int _SC_CLK_TCK
```
    Used in the OsHelper#getSystemConfig(int) method for querying the number of clock ticks per second.
    
    从以下版本开始:
    
    3
- 方法详细资料
  - isRegularFile
```
public static boolean isRegularFile(int mode)
```
    Checks whether the file is a regular file based on the specified file mode. This method corresponds to the S_ISREG macro in the Linux sys/stat.h file.
    
    参数:
    
    mode - Indicates the file mode.
    
    返回:
    
    Returns true if the file is a regular file; returns false otherwise.
    
    从以下版本开始:
    
    3
  - isDir
```
public static boolean isDir(int mode)
```
    Checks whether the file is a directory based on the specified file mode. This method corresponds to the S_ISDIR macro in the Linux sys/stat.h file.
    
    参数:
    
    mode - Indicates the file mode.
    
    返回:
    
    Returns true if the file is a directory; returns false otherwise.
    
    从以下版本开始:
    
    3

类 OsHelperConstants

字段概要

方法概要

从类继承的方法 java.lang.Object

字段详细资料

EEXIST

ENOENT

ENOSPC

EXDEV

F_OK

PR_SET_DUMPABLE

R_OK

SEEK_CUR

SEEK_END

SEEK_SET

SOL_SOCKET

SO_SNDTIMEO

S_IRGRP

S_IROTH

S_IRUSR

S_IRWXG

S_IRWXO

S_IRWXU

S_ISUID

S_ISVTX

S_IWGRP

S_IWOTH

S_IWUSR

S_IXGRP

S_IXOTH

S_IXUSR

W_OK

X_OK

_SC_CLK_TCK

方法详细资料

isRegularFile

isDir