vop_ioctl(9)

NAME

VOP_IOCTL - device specific control

SYNOPSIS

#include <sys/param.h>
#include <sys/vnode.h>
int
VOP_IOCTL(struct vnode *vp, u_long  command,  caddr_t  data,
int fflag,
        struct ucred *cred, struct thread *td);

DESCRIPTION

Manipulate a file in device dependent ways.

Its arguments are:

vp The vnode of the file (normally representing a de

vice).

command The device specific operation to perform.

data Extra data for the specified operation.

fflag Some flags ???

cred The caller's credentials.

td The calling thread.

Most file systems do not implement this entry point.

LOCKS

The file should not be locked on entry.

RETURN VALUES

If successful, zero is returned, otherwise an appropriate

error code.

If the ioctl is not recognized or not handled, ENOTTY should

be returned.

PSEUDOCODE

int
vop_ioctl(struct vnode *vp, int command, caddr_t data, int

fflag,

struct ucred *cred, struct thread *td)

{

return ENOTTY;

}

SEE ALSO

vnode(9)

AUTHORS

This manual page was written by Doug Rabson.

BSD July 24, 1996

BSD