fcntl.h File Reference

#include <Macros.h>
#include <stdio.h>
#include "sys/types.h"

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Macros
File Constants
#define	O_CREAT   (1 << 0)
	Create file if it does not exist.
#define	O_EXCL   (1 << 1)
	Exclusive use flag.
#define	O_NOCTTY   (1 << 2)
	Do not assign controlling terminal.
#define	O_TRUNC   (1 << 3)
	Truncate flag.
#define	O_TTY_INIT   (1 << 4)
	Set the termios structure terminal parameters to a state that provides conforming behavior; see Parameters that Can be Set.
#define	O_APPEND   (1 << 5)
	Set append mode.
#define	O_DSYNC   (1 << 6)
	Write according to synchronized I/O data integrity completion.
#define	O_NONBLOCK   (1 << 7)
	Non-blocking mode.
#define	O_RSYNC   (1 << 8)
	Synchronized read I/O operations.
#define	O_SYNC   (1 << 9)
	Write according to synchronized I/O file integrity completion.
#define	O_ACCMODE   (O_EXEC | O_RDONLY | O_RDWR | O_SEARCH | O_WRONLY)
	Mask for file access modes.
#define	O_EXEC   (1 << 10)
	Open for execute only (non-directory files).
#define	O_RDONLY   (1 << 11)
	Open for reading only.
#define	O_RDWR   (1 << 12)
	Open for reading and writing.
#define	O_SEARCH   (1 << 13)
	Open directory for search only.
#define	O_WRONLY   (1 << 14)
	Open for writing only.

Functions
C int	open (const char *path, int oflag,...)
	Open file relative to directory file descriptor.