3 .\" Copyright (c) 1996 Doug Rabson
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36 .Nd device specific control
41 .Fn VOP_IOCTL "struct vnode *vp" "u_long command" "caddr_t data" "int fflag" "struct ucred *cred" "struct thread *td"
43 Manipulate a file in device dependent ways.
46 .Bl -tag -width command
48 The vnode of the file (normally representing a device).
50 The device specific operation to perform.
52 Extra data for the specified operation.
56 The caller's credentials.
61 Most file systems do not implement this entry point.
63 The file should not be locked on entry.
65 If successful, zero is returned, otherwise an appropriate error code.
67 If the ioctl is not recognized or not handled,
73 vop_ioctl(struct vnode *vp, int command, caddr_t data, int fflag,
74 struct ucred *cred, struct thread *td)
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