fcntl.h File Reference

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Macros
#define	O_ACCMODE   0x0003
#define	O_RDONLY   0
#define	O_WRONLY   1
#define	O_RDWR   2
#define	O_APPEND   0x0008
#define	O_CREAT   0x0200
#define	O_TRUNC   0x0400
#define	O_EXCL   0x0800
#define	O_NONBLOCK   0x4000
#define	O_NOCTTY   0x8000
#define	O_LARGEFILE   0
#define	O_DIRECTORY   0x200000
#define	O_CLOEXEC   0x400000
#define	F_DUPFD   0
#define	F_GETFD   1
#define	F_SETFD   2
#define	F_GETFL   3
#define	F_SETFL   4
#define	F_DUPFD_CLOEXEC   1030
#define	FD_CLOEXEC   1
#define	AT_FDCWD   (-100)
#define	AT_SYMLINK_NOFOLLOW   0x100

Functions
int	open (const char *pathname, int flags,...)
	Open the file specified by the pathname. More...
int	fcntl (int fd, int cmd,...)
	Act on an open file descriptor. More...

Function Documentation

fcntl()

int fcntl	(	int	fd,
		int	cmd,
			...
	)

Act on an open file descriptor.

Parameters

fd	The file descriptor to provide.
cmd	F_DUPFD, F_GETFD, F_SETFD, F_GETFL or F_SETFL.
arg	The lowest descriptor to duplicate onto, or the flags to set.

Return values

int	The answer of the command on success and -1 on error, with the reason left in errno.

open()

int open	(	const char *	pathname,
		int	flags,
			...
	)

Open the file specified by the pathname.

Parameters

pathname	The pathname of the file.
flags	Flags for opening the file.
mode	The permission bits of the file, when O_CREAT is given and the file has to be created. Ignored otherwise.

Return values

int	The file descriptor of the file on success and -1 on error, with the reason left in errno.