fcntl.h

[随书类]Dos6.0源代码

/***
*fcntl.h - file control options used by open()
*
*	Copyright (c) 1985-1990, Microsoft Corporation.  All rights reserved.
*
*Purpose:
*	This file defines constants for the file control options used
*	by the open() function.
*	[System V]
*
****/

#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 */