DragonFly On-Line Manual Pages
VOP_IOCTL(9) DragonFly 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 proc *p);
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
cnp extra data for the specified operation
fflag some flags ???
cred the caller's credentials
p the calling process
Most filesystems 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.
PSEUDOCODE
int
vop_ioctl(struct vnode *vp, int command, caddr_t data, int fflag,
struct ucred *cred, struct proc *p)
{
return EOPNOTSUPP;
}
SEE ALSO
vnode(9)
AUTHORS
This man page was written by Doug Rabson.
DragonFly 3.5 July 24, 1996 DragonFly 3.5