129 lines
3.7 KiB
Groff
129 lines
3.7 KiB
Groff
.\" $NetBSD: prop_send_syscall.3,v 1.5 2011/09/30 22:08:18 jym Exp $
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.\"
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.\" Copyright (c) 2006 The NetBSD Foundation, Inc.
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.\" All rights reserved.
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.\"
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.\" This code is derived from software contributed to The NetBSD Foundation
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.\" by Jason R. Thorpe.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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.\" ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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.\" TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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.\" PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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.\" BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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.\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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.\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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.\" POSSIBILITY OF SUCH DAMAGE.
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.\"
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.Dd January 17, 2011
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.Dt PROP_SEND_SYCALL 3
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.Os
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.Sh NAME
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.Nm prop_array_send_syscall ,
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.Nm prop_array_recv_syscall ,
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.Nm prop_dictionary_send_syscall ,
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.Nm prop_dictionary_recv_syscall
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.Nd send and receive property lists to and from the kernel using syscalls
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.Sh SYNOPSIS
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.In prop/proplib.h
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.Ft int
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.Fn prop_array_send_syscall "prop_array_t array" "struct plistref *prefp"
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.Ft int
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.Fn prop_array_recv_syscall "const struct plistref *prefp" \
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"prop_array_t *arrayp"
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.Ft int
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.Fn prop_dictionary_send_syscall "prop_dictionary_t dict" \
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"struct plistref *prefp"
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.Ft int
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.Fn prop_dictionary_recv_syscall "const struct plistref *prefp" \
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"prop_dictionary_t *dictp"
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.Sh DESCRIPTION
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The
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.Nm prop_array_send_syscall ,
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.Nm prop_array_recv_syscall ,
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.Nm prop_dictionary_send_syscall ,
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and
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.Nm prop_dictionary_recv_syscall
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functions implement the user space side of a protocol for sending property
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lists to and from the kernel using
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.Xr syscall 2 .
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.Sh RETURN VALUES
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If successful, functions return zero.
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Otherwise, an error number is returned to indicate the error.
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.Sh EXAMPLES
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The following
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.Pq simplified
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example demonstrates using
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.Fn prop_dictionary_send_syscall
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and
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.Fn prop_dictionary_recv_syscall
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in an application:
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.Bd -literal
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void
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foo_setprops(prop_dictionary_t dict)
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{
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struct pref pref;
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(void) prop_dictionary_send_syscall(dict, \*[Am]pref);
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(void) my_syscall_set(\*[Am]pref);
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}
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prop_dictionary_t
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foo_getprops(void)
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{
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prop_dictionary_t dict;
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struct pref pref;
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(void) my_syscall_get(\*[Am]pref);
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if (prop_dictionary_recv_syscall(\*[Am]pref, \*[Am]dict) != 0)
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return (NULL);
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return (dict);
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}
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.Ed
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.Sh ERRORS
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.Fn prop_array_send_syscall
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and
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.Fn prop_dictionary_send_syscall
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will fail if:
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.Bl -tag -width Er
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.It Bq Er ENOMEM
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Cannot allocate memory
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.It Bq Er ENOTSUP
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Not supported
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.El
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.Pp
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.Fn prop_array_recv_syscall
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and
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.Fn prop_dictionary_recv_syscall
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will fail if:
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.Bl -tag -width Er
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.It Bq Er EIO
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Input/output error
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.It Bq Er ENOTSUP
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Not supported
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.El
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.Sh SEE ALSO
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.Xr prop_array 3 ,
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.Xr prop_dictionary 3 ,
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.Xr proplib 3 ,
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.Xr prop_copyin_ioctl 9
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.Sh HISTORY
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The
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.Nm proplib
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property container object library first appeared in
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.Nx 4.0 .
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