AT&T UNIX™PC Unix System V Users Manual - tenox

FCNTL ( 5) FCNTL (5)
NAME
fcntl - file control options
SYNOPSIS
#include
DESCRIPTION
The fcntl(2) function provides for control over open files. This
include file describes requests and arguments to fcntl and
open(2).
I* Flag values accessible to open(2) and fcntl(2) *I
I* (The first three can only be set by open) *I
#define O_RDONL Y 0
#define O_WRONLY 1
#define O_RDWR 2
#define O_NDELAY 04
#define O_APPEND 010
I* Non-blocking I/O *I
I* append (writes guaranteed * I
I * at the end) *I
#define O_DIRECT 01000001* Direct I/O *I
I* Flag values accessible only to open(2) *I
#define O_CREAT 00400 I* open with file create * I
j * (uses th ird open arg)* I
#define O_TRUNC 01000 I* open with truncation *I
#define O_EXCL 02000 I* exclusive open *I
I* f cntl( 2) requests *I
#define F _DUPFD 0
#define F _GETFD 1
#define F _SETFD 2
#define F _GETFL 3
#define F _SETFL 4
#define F _GETLK 5
#define F _SETLK 6
#define F _SETLKW 7
I* Duplicate tildes *I
I* Get tildes flags *I
I* Set tildes flags *I
I* Get file flags *I
I* Set file flags *I
I* Get file lock *I
I* Set file lock *I
I* Set file lock and wait *I
I* File segment locking set data type - information passed
to system by user *I
struct flock {
};
short
short
long
long
int
!_type;
!_whence;
!_start;
!_len; I* len = 0 means until end of file *I
l_pid;
#define F _RDLCK 01
#define F _ WRLCK 02
#define F _UNLCK 03
SEE ALSO
fcntl(2), open(2).
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