filio.h

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#pragma once
 
#include <sys/ioccom.h>
 
/* Generic file-descriptor ioctl's. */
#define FIOCLEX     _IO('f', 1)         /* set close on exec on fd */
#define FIONCLEX    _IO('f', 2)         /* remove close on exec */
#define FIONREAD    _IOR('f', 127, int) /* get # bytes to read */
#define FIONWRITE   _IOR('f', 119, int) /* get # bytes (yet) to write */
#define FIONBIO     _IOW('f', 126, int) /* set/clear non-blocking i/o */
#define FIOASYNC    _IOW('f', 125, int) /* set/clear async i/o */
#define FIOSETOWN   _IOW('f', 124, int) /* set owner */
#define FIOGETOWN   _IOR('f', 123, int) /* get owner */
#define FIODTYPE    _IOR('f', 122, int) /* get d_flags type part */
#define FIOGETLBA   _IOR('f', 121, int) /* get start blk # */
struct fiodgname_arg {
    int  len;
    void *buf;
};
#define FIODGNAME   _IOW('f', 120, struct fiodgname_arg) /* get dev. name */
#define FIONSPACE   _IOR('f', 118, int) /* get space in send queue */