FreeBSD-5.3/usr.sbin/rpc.lockd/lockd.c
/* $NetBSD: lockd.c,v 1.7 2000/08/12 18:08:44 thorpej Exp $ */
/* $FreeBSD: src/usr.sbin/rpc.lockd/lockd.c,v 1.18 2004/07/16 19:30:59 mr Exp $ */
/*
* Copyright (c) 1995
* A.R. Gordon (andrew.gordon@net-tel.co.uk). All rights reserved.
*
* 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed for the FreeBSD project
* 4. Neither the name of the author nor the names of any co-contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY ANDREW GORDON 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 AUTHOR 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.
*
*/
#include <sys/cdefs.h>
#ifndef lint
__RCSID("$NetBSD: lockd.c,v 1.7 2000/08/12 18:08:44 thorpej Exp $");
#endif
/*
* main() function for NFS lock daemon. Most of the code in this
* file was generated by running rpcgen /usr/include/rpcsvc/nlm_prot.x.
*
* The actual program logic is in the file lock_proc.c
*/
#include <sys/types.h>
#include <sys/socket.h>
#include <err.h>
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <syslog.h>
#include <signal.h>
#include <string.h>
#include <unistd.h>
#include <libutil.h>
#include <netconfig.h>
#include <rpc/rpc.h>
#include <rpc/rpc_com.h>
#include <rpcsvc/sm_inter.h>
#include "lockd.h"
#include <rpcsvc/nlm_prot.h>
int debug_level = 0; /* 0 = no debugging syslog() calls */
int _rpcsvcdirty = 0;
int grace_expired;
int nsm_state;
pid_t client_pid;
struct mon mon_host;
void init_nsm(void);
void nlm_prog_0(struct svc_req *, SVCXPRT *);
void nlm_prog_1(struct svc_req *, SVCXPRT *);
void nlm_prog_3(struct svc_req *, SVCXPRT *);
void nlm_prog_4(struct svc_req *, SVCXPRT *);
void usage(void);
void sigalarm_handler(void);
const char *transports[] = { "udp", "tcp", "udp6", "tcp6" };
int
main(argc, argv)
int argc;
char **argv;
{
SVCXPRT *transp;
int ch, i, maxindex, s;
struct sigaction sigalarm;
int grace_period = 30;
struct netconfig *nconf;
int maxrec = RPC_MAXDATASIZE;
while ((ch = getopt(argc, argv, "d:g:")) != (-1)) {
switch (ch) {
case 'd':
debug_level = atoi(optarg);
if (!debug_level) {
usage();
/* NOTREACHED */
}
break;
case 'g':
grace_period = atoi(optarg);
if (!grace_period) {
usage();
/* NOTREACHED */
}
break;
default:
case '?':
usage();
/* NOTREACHED */
}
}
if (geteuid()) { /* This command allowed only to root */
fprintf(stderr, "Sorry. You are not superuser\n");
exit(1);
}
(void)rpcb_unset(NLM_PROG, NLM_SM, NULL);
(void)rpcb_unset(NLM_PROG, NLM_VERS, NULL);
(void)rpcb_unset(NLM_PROG, NLM_VERSX, NULL);
(void)rpcb_unset(NLM_PROG, NLM_VERS4, NULL);
/*
* Check if IPv6 support is present.
*/
s = socket(AF_INET6, SOCK_DGRAM, IPPROTO_UDP);
if (s < 0)
maxindex = 2;
else {
close(s);
maxindex = 4;
}
rpc_control(RPC_SVC_CONNMAXREC_SET, &maxrec);
for (i = 0; i < maxindex; i++) {
nconf = getnetconfigent(transports[i]);
if (nconf == NULL)
errx(1, "cannot get %s netconf: %s.", transports[i],
nc_sperror());
transp = svc_tli_create(RPC_ANYFD, nconf, NULL,
RPC_MAXDATASIZE, RPC_MAXDATASIZE);
if (transp == NULL) {
errx(1, "cannot create %s service.", transports[i]);
/* NOTREACHED */
}
if (!svc_reg(transp, NLM_PROG, NLM_SM, nlm_prog_0, nconf)) {
errx(1, "unable to register (NLM_PROG, NLM_SM, %s)",
transports[i]);
/* NOTREACHED */
}
if (!svc_reg(transp, NLM_PROG, NLM_VERS, nlm_prog_1, nconf)) {
errx(1, "unable to register (NLM_PROG, NLM_VERS, %s)",
transports[i]);
/* NOTREACHED */
}
if (!svc_reg(transp, NLM_PROG, NLM_VERSX, nlm_prog_3, nconf)) {
errx(1, "unable to register (NLM_PROG, NLM_VERSX, %s)",
transports[i]);
/* NOTREACHED */
}
if (!svc_reg(transp, NLM_PROG, NLM_VERS4, nlm_prog_4, nconf)) {
errx(1, "unable to register (NLM_PROG, NLM_VERS4, %s)",
transports[i]);
/* NOTREACHED */
}
freenetconfigent(nconf);
}
/*
* Note that it is NOT sensible to run this program from inetd - the
* protocol assumes that it will run immediately at boot time.
*/
if (daemon(0, debug_level > 0)) {
err(1, "cannot fork");
/* NOTREACHED */
}
openlog("rpc.lockd", 0, LOG_DAEMON);
if (debug_level)
syslog(LOG_INFO, "Starting, debug level %d", debug_level);
else
syslog(LOG_INFO, "Starting");
sigalarm.sa_handler = (sig_t) sigalarm_handler;
sigemptyset(&sigalarm.sa_mask);
sigalarm.sa_flags = SA_RESETHAND; /* should only happen once */
sigalarm.sa_flags |= SA_RESTART;
if (sigaction(SIGALRM, &sigalarm, NULL) != 0) {
syslog(LOG_WARNING, "sigaction(SIGALRM) failed: %s",
strerror(errno));
exit(1);
}
grace_expired = 0;
alarm(10);
init_nsm();
client_pid = client_request();
svc_run(); /* Should never return */
exit(1);
}
void
sigalarm_handler(void)
{
grace_expired = 1;
}
void
usage()
{
errx(1, "usage: rpc.lockd [-d <debuglevel>] [-g <grace period>]");
}
/*
* init_nsm --
* Reset the NSM state-of-the-world and acquire its state.
*/
void
init_nsm(void)
{
enum clnt_stat ret;
my_id id;
sm_stat stat;
char name[] = "NFS NLM";
char localhost[] = "localhost";
/*
* !!!
* The my_id structure isn't used by the SM_UNMON_ALL call, as far
* as I know. Leave it empty for now.
*/
memset(&id, 0, sizeof(id));
id.my_name = name;
/*
* !!!
* The statd program must already be registered when lockd runs.
*/
do {
ret = callrpc("localhost", SM_PROG, SM_VERS, SM_UNMON_ALL,
(xdrproc_t)xdr_my_id, &id, (xdrproc_t)xdr_sm_stat, &stat);
if (ret == RPC_PROGUNAVAIL) {
syslog(LOG_WARNING, "%lu %s", SM_PROG,
clnt_sperrno(ret));
sleep(2);
continue;
}
break;
} while (0);
if (ret != 0) {
syslog(LOG_ERR, "%lu %s", SM_PROG, clnt_sperrno(ret));
exit(1);
}
nsm_state = stat.state;
/* setup constant data for SM_MON calls */
mon_host.mon_id.my_id.my_name = localhost;
mon_host.mon_id.my_id.my_prog = NLM_PROG;
mon_host.mon_id.my_id.my_vers = NLM_SM;
mon_host.mon_id.my_id.my_proc = NLM_SM_NOTIFY; /* bsdi addition */
}