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Manual page for FCNTL(5)

fcntl - file control options

SYNOPSIS

#include <fcntl.h>

DESCRIPTION

The fcntl.2v function provides for control over open files. This include file describes requests and arguments to fcntl and open.2v as shown below: 

/*	@ (#)fcntl.h 1.2 83/12/08 SMI; from UCB 4.2 83/09/25	*/
/*
* Flag values accessible to open(2V) 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	FNDELAY	/* Non-blocking I/O */
#define	O_APPEND	FAPPEND	/* append (writes guaranteed at the end) */
#ifndef	F_DUPFD
/* 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 */
#define	F_GETOWN	5	/* Get owner */
#define	F_SETOWN	6	/* Set owner */
/* flags for F_GETFL, F_SETFL-- copied from <sys/file.h> */
#define	FNDELAY		00004		/* non-blocking reads */
#define	FAPPEND		00010		/* append on each write */
#define	FASYNC		00100		/* signal pgrp when data ready */
#endif

SEE ALSO

fcntl.2v open.2v

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