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.\" $NetBSD: prop_copyin_ioctl.9,v 1.9 2011/01/20 10:47:33 wiz Exp $
.\"
.\" Copyright (c) 2006, 2009 The NetBSD Foundation, Inc.
.\" All rights reserved.
.\"
.\" This code is derived from software contributed to The NetBSD Foundation
.\" by Jason R. Thorpe.
.\"
.\" Redistribution and use in source and binary forms, with or without
.\" modification, are permitted provided that the following conditions
.\" are met:
.\" 1. Redistributions of source code must retain the above copyright
.\" notice, this list of conditions and the following disclaimer.
.\" 2. Redistributions in binary form must reproduce the above copyright
.\" notice, this list of conditions and the following disclaimer in the
.\" documentation and/or other materials provided with the distribution.
.\"
.\" THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
.\" ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
.\" TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
.\" PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
.\" BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
.\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
.\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
.\" POSSIBILITY OF SUCH DAMAGE.
.\"
.Dd January 17, 2011
.Dt PROP_COPYIN_IOCTL 9
.Os
.Sh NAME
.Nm prop_array_copyin_ioctl ,
.Nm prop_array_copyout_ioctl ,
.Nm prop_array_copyin ,
.Nm prop_array_copyout ,
.Nm prop_dictionary_copyin_ioctl ,
.Nm prop_dictionary_copyout_ioctl ,
.Nm prop_dictionary_copyin ,
.Nm prop_dictionary_copyout
.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_copyin "const struct plistref *pref" \
"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_array_copyout "struct plistref *pref" \
"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_copyin "const struct plistref *pref" \
"prop_dictionary_t *dictp"
.Ft int
.Fn prop_dictionary_copyout_ioctl "struct plistref *pref" \
"const u_long cmd" "prop_dictionary_t dict"
.Ft int
.Fn prop_dictionary_copyout "struct plistref *pref" \
"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 copying property lists
to and from the kernel using
.Xr ioctl 2 .
The functions
.Nm prop_array_copyin ,
.Nm prop_array_copyout ,
.Nm prop_dictionary_copyin ,
and
.Nm prop_dictionary_copyout
implement the kernel side of a protocol for copying property lists to the
kernel as arguments of normal system calls.
.Pp
A kernel routine receiving 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.
.Sh RETURN VALUES
If successful, functions return zero.
Otherwise, an error number will be returned to indicate the error.
.Sh EXAMPLES
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;
switch (cmd) {
case FOOSETPROPS: {
const struct plistref *pref = (const struct plistref *) data;
error = prop_dictionary_copyin_ioctl(pref, cmd, \*[Am]dict);
if (error)
return (error);
odict = fooprops;
fooprops = dict;
prop_object_release(odict);
break;
}
case FOOGETPROPS: {
struct plistref *pref = (struct plistref *) data;
error = prop_dictionary_copyout_ioctl(pref, cmd, fooprops);
break;
}
default:
return (EPASSTHROUGH);
}
return (error);
}
.Ed
.Pp
The following
.Pq simplified
example demonstrates using
.Fn prop_array_copyin
in a routine:
.Bd -literal
int
foocopyin(const struct plistref *pref))
{
prop_array_t array;
int error;
error = prop_array_copyin(pref, \*[Am]array);
if (error)
return (error);
...
}
.Ed
.Sh ERRORS
.Fn prop_array_copyin_ioctl
and
.Fn prop_dictionary_copyin_ioctl
will fail if:
.Bl -tag -width Er
.It Bq Er EFAULT
Bad address
.It Bq Er EIO
Input/output error
.It Bq Er ENOMEM
Cannot allocate memory
.It Bq Er ENOTSUP
Not supported
.El
.Pp
.Fn prop_array_copyout_ioctl
and
.Fn prop_dictionary_copyout_ioctl
will fail if:
.Bl -tag -width Er
.It Bq Er EFAULT
Bad address
.It Bq Er ENOMEM
Cannot allocate memory
.It Bq Er ENOTSUP
Not supported
.El
.Sh SEE ALSO
.Xr prop_array 3 ,
.Xr prop_dictionary 3 ,
.Xr prop_send_ioctl 3 ,
.Xr prop_send_syscall 3 ,
.Xr proplib 3
.Sh HISTORY
The
.Nm proplib
property container object library first appeared in
.Nx 4.0 .
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