file-permission-constants.md

description	Learn more about: File Permission Constants
title	File Permission Constants
ms.date	11/04/2016
helpviewer_keywords	S_IWRITE constant constants [C++], file attributes S_IREAD constant file permissions [C++] _S_IWRITE constant _S_IREAD constant
ms.assetid	593cad33-31d1-44d2-8941-8af7d210c88c

File permission constants

Syntax

#include <sys/stat.h>

Remarks

One of these constants is required when _O_CREAT (_open, _sopen) is specified.

The pmode argument specifies the file's permission settings as follows.

Constant	Meaning
_S_IREAD	Reading permitted
_S_IWRITE	Writing permitted
`_S_IREAD	_S_IWRITE`

When used as the pmode argument for _umask, the manifest constant sets the permission setting, as follows.

Constant	Meaning
_S_IREAD	Writing not permitted (file is read-only)
_S_IWRITE	Reading not permitted (file is write-only)
`_S_IREAD	_S_IWRITE`

See also

_open, _wopen
_sopen, _wsopen
_umask
Standard types
Global constants