fcntl.h

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/***
*fcntl.h - file control options used by open()
*
*       Copyright (c) Microsoft Corporation. All rights reserved.
*
*Purpose:
*       This file defines constants for the file control options used
*       by the _open() function.
*       [System V]
*
*       [Public]
*
****/

#pragma once

#include <crtdefs.h>

#ifndef _INC_FCNTL
#define _INC_FCNTL

#define _O_RDONLY       0x0000  /* open for reading only */
#define _O_WRONLY       0x0001  /* open for writing only */
#define _O_RDWR         0x0002  /* open for reading and writing */
#define _O_APPEND       0x0008  /* writes done at eof */

#define _O_CREAT        0x0100  /* create and open file */
#define _O_TRUNC        0x0200  /* open and truncate */
#define _O_EXCL         0x0400  /* open only if file doesn't already exist */

/* O_TEXT files have <cr><lf> sequences translated to <lf> on read()'s,
** and <lf> sequences translated to <cr><lf> on write()'s
*/

#define _O_TEXT         0x4000  /* file mode is text (translated) */
#define _O_BINARY       0x8000  /* file mode is binary (untranslated) */
#define _O_WTEXT        0x10000 /* file mode is UTF16 (translated) */
#define _O_U16TEXT      0x20000 /* file mode is UTF16 no BOM (translated) */
#define _O_U8TEXT       0x40000 /* file mode is UTF8  no BOM (translated) */

/* macro to translate the C 2.0 name used to force binary mode for files */

#define _O_RAW  _O_BINARY

/* Open handle inherit bit */

#define _O_NOINHERIT    0x0080  /* child process doesn't inherit file */

/* Temporary file bit - file is deleted when last handle is closed */

#define _O_TEMPORARY    0x0040  /* temporary file bit */

/* temporary access hint */

#define _O_SHORT_LIVED  0x1000  /* temporary storage file, try not to flush */

/* directory access hint */

#define _O_OBTAIN_DIR   0x2000  /* get information about a directory */

/* sequential/random access hints */

#define _O_SEQUENTIAL   0x0020  /* file access is primarily sequential */
#define _O_RANDOM       0x0010  /* file access is primarily random */

#if !__STDC__
/* Non-ANSI names for compatibility */
#define O_RDONLY        _O_RDONLY
#define O_WRONLY        _O_WRONLY
#define O_RDWR          _O_RDWR
#define O_APPEND        _O_APPEND
#define O_CREAT         _O_CREAT
#define O_TRUNC         _O_TRUNC
#define O_EXCL          _O_EXCL
#define O_TEXT          _O_TEXT
#define O_BINARY        _O_BINARY
#define O_RAW           _O_BINARY
#define O_TEMPORARY     _O_TEMPORARY
#define O_NOINHERIT     _O_NOINHERIT
#define O_SEQUENTIAL    _O_SEQUENTIAL
#define O_RANDOM        _O_RANDOM
#endif  /* !__STDC__ */

#endif  /* _INC_FCNTL */