\" $NetBSD: prop_copyin_ioctl.9,v 1.2 2007/04/22 11:23:29 yamt Exp $
\"
\" Copyright (c) 2006 The NetBSD Foundation, Inc.
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\" This code is derived from software contributed to The NetBSD Foundation
\" by Jason R. Thorpe.
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Dd October 25, 2006
Dt PROP_COPYIN_IOCTL 9
Os
Sh NAME
Nm prop_array_copyin_ioctl ,
Nm prop_array_copyout_ioctl ,
Nm prop_dictionary_copyin_ioctl ,
Nm prop_dictionary_copyout_ioctl
Nd Copy property lists to and from kernel space
Sh SYNOPSIS
In prop/proplib.h
Ft int
Fn prop_array_copyin_ioctl "const struct plistref *pref" \
"const u_long cmd" "prop_array_t *arrayp"
Ft int
Fn prop_array_copyout_ioctl "struct plistref *pref" \
"const u_long cmd" "prop_array_t array"
Ft int
Fn prop_dictionary_copyin_ioctl "const struct plistref *pref" \
"const u_long cmd" "prop_dictionary_t *dictp"
Ft int
Fn prop_dictionary_copyout_ioctl "struct plistref *pref" \
"const u_long cmd" "prop_dictionary_t dict"
Sh DESCRIPTION
The
Nm prop_array_copyin_ioctl ,
Nm prop_array_copyout_ioctl ,
Nm prop_dictionary_copyin_ioctl ,
and
Nm prop_dictionary_copyout_ioctl
functions implement the kernel side of a protocol for sending property lists
to and from the kernel using
Xr ioctl 2 .
Pp
A kernel ioctl routine receivig or returning a property list will be passed a
pointer to a
Vt struct plistref .
This structure encapsulates the reference to the property list in externalized
form.
Pp
The following
Pq simplified
example demonstrates using
Fn prop_dictionary_copyin_ioctl
and
Fn prop_dictionary_copyout_ioctl
in an ioctl routine:
Bd -literal
extern prop_dictionary_t fooprops;
int
fooioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct lwp *l)
{
prop_dictionary_t dict, odict;
int error;
default:
return (EPASSTHROUGH);
}
return (error);
}
Ed
Sh SEE ALSO
Xr prop_array 3 ,
Xr prop_dictionary 3 ,
Xr prop_send_ioctl 3 ,
Xr proplib 3
Sh HISTORY
The
Nm proplib
property container object library first appeared in
Nx 4.0 .
