 @@ -1,197 +1,233 @@
-.\"	$NetBSD: prop_copyin_ioctl.9,v 1.11 2017/01/15 22:14:22 wiz Exp $
+.\"	$NetBSD: prop_copyin_ioctl.9,v 1.12 2017/01/29 01:38:02 pgoyette 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
+.Dd January 29, 2017
 .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_ioctl_size "const struct plistref *pref" \
     "const u_long cmd" "prop_array_t *arrayp" "size_t lim"
 .Ft int
 .Fn prop_array_copyin "const struct plistref *pref" \
     "prop_array_t *arrayp"
 .Ft int
 .Fn prop_array_copyin_size "const struct plistref *pref" \
     "prop_array_t *arrayp" "size_t lim"
 .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_ioctl_size "const struct plistref *pref" \
     "const u_long cmd" "prop_dictionary_t *dictp" "size_t lim"
 .Ft int
 .Fn prop_dictionary_copyin "const struct plistref *pref" \
     "prop_dictionary_t *dictp"
 .Ft int
 .Fn prop_dictionary_copyin_size "const struct plistref *pref" \
     "prop_dictionary_t *dictp" "size_t lim"
 .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_ioctl ,
 .Nm prop_array_copyin_ioctl ,
 .Nm prop_array_copyin_ioctl_size ,
 .Nm prop_array_copyout_ioctl ,
 .Nm prop_dictionary_copyin_ioctl ,
 .Nm prop_dictionary_copyin_ioctl_size ,
 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_copyin_size ,
 .Nm prop_array_copyout ,
 .Nm prop_dictionary_copyin ,
 .Nm prop_dictionary_copyin_size ,
 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.
 .Pp
 The functions
 .Nm prop_array_copyin_ioctl_size ,
 .Nm prop_dictionary_copyin_ioctl_size ,
 .Nm prop_array_copyin_size ,
 and
 .Nm prop_dictionary_copyin_size ,
 take an explicit limit argument
 .Ar lim
 while
 .Nm prop_array_copyin_ioctl ,
 .Nm prop_dictionary_copyin_ioctl ,
 .Nm prop_array_copyin ,
 and
 .Nm prop_dictionary_copyin ,
 have an implicit size limit of 128KB.
 Attempts to transfer objects larger than the limit result in an
 .Er E2BIG
 return value.
 .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 E2BIG
 The object being copied is larger than an arbitrarily established limit
 (currently set to 128Kbytes).
 .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 .