FCNTL(5) — Silicon Graphics

NAME

fcntl − file control options

#include <fcntl.h>

The fcntl(2) function provides for control over open files. This include file describes requests and arguments to fcntl and open(2).

/∗ Flag values accessible to open(2) and fcntl(2) ∗/
/∗ (The first three can only be set by open) ∗/

#define	O_RDONLY	0
#define	O_WRONLY	1
#define	O_RDWR	2
#define	O_NDELAY	04	/∗ Non-blocking I/O ∗/
#define	O_APPEND	010	/∗ append (writes guaranteed at the end) ∗/
/∗ Flag values accessible only to open(2) ∗/
#define	O_CREAT	00400	/∗ open with file create (uses third open arg)∗/
#define	O_TRUNC	01000	/∗ open with truncation ∗/
#define	O_EXCL	02000	/∗ exclusive open ∗/
/∗ fcntl(2) requests ∗/
#define	F_DUPFD	0	/∗ Duplicate fildes ∗/
#define	F_GETFD	1	/∗ Get fildes flags ∗/
#define	F_SETFD	2	/∗ Set fildes flags ∗/
#define	F_GETFL	3	/∗ Get file flags ∗/
#define	F_SETFL	4	/∗ Set file flags ∗/