mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-20 11:11:24 +00:00
8a16b7a18f
Mainly focus on files that use BSD 3-Clause license. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts. Special thanks to Wind River for providing access to "The Duke of Highlander" tool: an older (2014) run over FreeBSD tree was useful as a starting point.
141 lines
4.6 KiB
C
141 lines
4.6 KiB
C
/* $NetBSD: pmap_prot2.c,v 1.14 2000/07/06 03:10:34 christos Exp $ */
|
|
|
|
/*-
|
|
* SPDX-License-Identifier: BSD-3-Clause
|
|
*
|
|
* Copyright (c) 2009, Sun Microsystems, Inc.
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions are met:
|
|
* - Redistributions of source code must retain the above copyright notice,
|
|
* this list of conditions and the following disclaimer.
|
|
* - 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.
|
|
* - Neither the name of Sun Microsystems, Inc. nor the names of its
|
|
* contributors may be used to endorse or promote products derived
|
|
* from this software without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 COPYRIGHT HOLDER 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.
|
|
*/
|
|
|
|
#if defined(LIBC_SCCS) && !defined(lint)
|
|
static char *sccsid2 = "@(#)pmap_prot2.c 1.3 87/08/11 Copyr 1984 Sun Micro";
|
|
static char *sccsid = "@(#)pmap_prot2.c 2.1 88/07/29 4.0 RPCSRC";
|
|
#endif
|
|
#include <sys/cdefs.h>
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
/*
|
|
* pmap_prot2.c
|
|
* Protocol for the local binder service, or pmap.
|
|
*
|
|
* Copyright (C) 1984, Sun Microsystems, Inc.
|
|
*/
|
|
|
|
#include "namespace.h"
|
|
#include <assert.h>
|
|
|
|
#include <rpc/types.h>
|
|
#include <rpc/xdr.h>
|
|
#include <rpc/pmap_prot.h>
|
|
#include "un-namespace.h"
|
|
|
|
|
|
/*
|
|
* What is going on with linked lists? (!)
|
|
* First recall the link list declaration from pmap_prot.h:
|
|
*
|
|
* struct pmaplist {
|
|
* struct pmap pml_map;
|
|
* struct pmaplist *pml_map;
|
|
* };
|
|
*
|
|
* Compare that declaration with a corresponding xdr declaration that
|
|
* is (a) pointer-less, and (b) recursive:
|
|
*
|
|
* typedef union switch (bool_t) {
|
|
*
|
|
* case TRUE: struct {
|
|
* struct pmap;
|
|
* pmaplist_t foo;
|
|
* };
|
|
*
|
|
* case FALSE: struct {};
|
|
* } pmaplist_t;
|
|
*
|
|
* Notice that the xdr declaration has no nxt pointer while
|
|
* the C declaration has no bool_t variable. The bool_t can be
|
|
* interpreted as ``more data follows me''; if FALSE then nothing
|
|
* follows this bool_t; if TRUE then the bool_t is followed by
|
|
* an actual struct pmap, and then (recursively) by the
|
|
* xdr union, pamplist_t.
|
|
*
|
|
* This could be implemented via the xdr_union primitive, though this
|
|
* would cause a one recursive call per element in the list. Rather than do
|
|
* that we can ``unwind'' the recursion
|
|
* into a while loop and do the union arms in-place.
|
|
*
|
|
* The head of the list is what the C programmer wishes to past around
|
|
* the net, yet is the data that the pointer points to which is interesting;
|
|
* this sounds like a job for xdr_reference!
|
|
*/
|
|
bool_t
|
|
xdr_pmaplist(XDR *xdrs, struct pmaplist **rp)
|
|
{
|
|
/*
|
|
* more_elements is pre-computed in case the direction is
|
|
* XDR_ENCODE or XDR_FREE. more_elements is overwritten by
|
|
* xdr_bool when the direction is XDR_DECODE.
|
|
*/
|
|
bool_t more_elements;
|
|
int freeing;
|
|
struct pmaplist **next = NULL; /* pacify gcc */
|
|
|
|
assert(xdrs != NULL);
|
|
assert(rp != NULL);
|
|
|
|
freeing = (xdrs->x_op == XDR_FREE);
|
|
|
|
for (;;) {
|
|
more_elements = (bool_t)(*rp != NULL);
|
|
if (! xdr_bool(xdrs, &more_elements))
|
|
return (FALSE);
|
|
if (! more_elements)
|
|
return (TRUE); /* we are done */
|
|
/*
|
|
* the unfortunate side effect of non-recursion is that in
|
|
* the case of freeing we must remember the next object
|
|
* before we free the current object ...
|
|
*/
|
|
if (freeing)
|
|
next = &((*rp)->pml_next);
|
|
if (! xdr_reference(xdrs, (caddr_t *)rp,
|
|
(u_int)sizeof(struct pmaplist), (xdrproc_t)xdr_pmap))
|
|
return (FALSE);
|
|
rp = (freeing) ? next : &((*rp)->pml_next);
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
* xdr_pmaplist_ptr() is specified to take a PMAPLIST *, but is identical in
|
|
* functionality to xdr_pmaplist().
|
|
*/
|
|
bool_t
|
|
xdr_pmaplist_ptr(XDR *xdrs, struct pmaplist *rp)
|
|
{
|
|
return xdr_pmaplist(xdrs, (struct pmaplist **)(void *)rp);
|
|
}
|