freebsd-dev/usr.sbin/rpcbind/warmstart.c
Pedro F. Giffuni 8a16b7a18f General further adoption of SPDX licensing ID tags.
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.
2017-11-20 19:49:47 +00:00

181 lines
4.7 KiB
C

/*-
* 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.
*/
/*
* warmstart.c
* Allows for gathering of registrations from an earlier dumped file.
*
* Copyright (c) 1990 by Sun Microsystems, Inc.
*/
/*
* #ident "@(#)warmstart.c 1.7 93/07/05 SMI"
* $FreeBSD$/
*/
#include <sys/types.h>
#include <sys/stat.h>
#include <stdio.h>
#include <rpc/rpc.h>
#include <rpc/rpcb_prot.h>
#include <rpc/xdr.h>
#ifdef PORTMAP
#include <netinet/in.h>
#include <rpc/pmap_prot.h>
#endif
#include <syslog.h>
#include <unistd.h>
#include "rpcbind.h"
/*
* XXX this code is unsafe and is not used. It should be made safe.
*/
/* These files keep the pmap_list and rpcb_list in XDR format */
#define RPCBFILE "/tmp/rpcbind.file"
#ifdef PORTMAP
#define PMAPFILE "/tmp/portmap.file"
#endif
static bool_t write_struct(char *, xdrproc_t, void *);
static bool_t read_struct(char *, xdrproc_t, void *);
static bool_t
write_struct(char *filename, xdrproc_t structproc, void *list)
{
FILE *fp;
XDR xdrs;
mode_t omask;
omask = umask(077);
fp = fopen(filename, "w");
if (fp == NULL) {
int i;
for (i = 0; i < 10; i++)
close(i);
fp = fopen(filename, "w");
if (fp == NULL) {
syslog(LOG_ERR,
"cannot open file = %s for writing", filename);
syslog(LOG_ERR, "cannot save any registration");
return (FALSE);
}
}
(void) umask(omask);
xdrstdio_create(&xdrs, fp, XDR_ENCODE);
if (structproc(&xdrs, list) == FALSE) {
syslog(LOG_ERR, "rpcbind: xdr_%s: failed", filename);
fclose(fp);
return (FALSE);
}
XDR_DESTROY(&xdrs);
fclose(fp);
return (TRUE);
}
static bool_t
read_struct(char *filename, xdrproc_t structproc, void *list)
{
FILE *fp;
XDR xdrs;
struct stat sbuf;
if (stat(filename, &sbuf) != 0) {
fprintf(stderr,
"rpcbind: cannot stat file = %s for reading\n", filename);
goto error;
}
if ((sbuf.st_uid != 0) || (sbuf.st_mode & S_IRWXG) ||
(sbuf.st_mode & S_IRWXO)) {
fprintf(stderr,
"rpcbind: invalid permissions on file = %s for reading\n",
filename);
goto error;
}
fp = fopen(filename, "r");
if (fp == NULL) {
fprintf(stderr,
"rpcbind: cannot open file = %s for reading\n", filename);
goto error;
}
xdrstdio_create(&xdrs, fp, XDR_DECODE);
if (structproc(&xdrs, list) == FALSE) {
fprintf(stderr, "rpcbind: xdr_%s: failed\n", filename);
fclose(fp);
goto error;
}
XDR_DESTROY(&xdrs);
fclose(fp);
return (TRUE);
error: fprintf(stderr, "rpcbind: will start from scratch\n");
return (FALSE);
}
void
write_warmstart(void)
{
(void) write_struct(RPCBFILE, (xdrproc_t)xdr_rpcblist_ptr, &list_rbl);
#ifdef PORTMAP
(void) write_struct(PMAPFILE, (xdrproc_t)xdr_pmaplist_ptr, &list_pml);
#endif
}
void
read_warmstart(void)
{
rpcblist_ptr tmp_rpcbl = NULL;
#ifdef PORTMAP
struct pmaplist *tmp_pmapl = NULL;
#endif
int ok1, ok2 = TRUE;
ok1 = read_struct(RPCBFILE, (xdrproc_t)xdr_rpcblist_ptr, &tmp_rpcbl);
if (ok1 == FALSE)
return;
#ifdef PORTMAP
ok2 = read_struct(PMAPFILE, (xdrproc_t)xdr_pmaplist_ptr, &tmp_pmapl);
#endif
if (ok2 == FALSE) {
xdr_free((xdrproc_t) xdr_rpcblist_ptr, (char *)&tmp_rpcbl);
return;
}
xdr_free((xdrproc_t) xdr_rpcblist_ptr, (char *)&list_rbl);
list_rbl = tmp_rpcbl;
#ifdef PORTMAP
xdr_free((xdrproc_t) xdr_pmaplist_ptr, (char *)&list_pml);
list_pml = tmp_pmapl;
#endif
}