Source code of Windows XP (NT5)
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/***
*fcntl.h - file control options used by open()** Copyright (c) 1985-1994, Microsoft Corporation. All rights reserved.**Purpose:* This file defines constants for the file control options used* by the _open() function.* [System V]*****/
#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) */
/* 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 */
/* sequential/random access hints */
#define _O_SEQUENTIAL 0x0020 /* file access is primarily sequential */
#define _O_RANDOM 0x0010 /* file access is primarily random */
#if !__STDC__ || defined(_POSIX_)
/* 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 */
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