usr/src/include/fcntl.h

/*      fcntl.h 4.2     83/09/25        */

/*
 * 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        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