VOP_IOCTL(9) BSD Kernel Developer's Manual 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 device).
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.
SEE ALSO
vnode(9)
AUTHORS
This manual page was written by Doug Rabson.
BSD
July 24, 1996 BSD
