270 lines
6.9 KiB
C
270 lines
6.9 KiB
C
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/* $NetBSD: lockd.c,v 1.7 2000/08/12 18:08:44 thorpej Exp $ */
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/* $FreeBSD$ */
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/*
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* Copyright (c) 1995
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* A.R. Gordon (andrew.gordon@net-tel.co.uk). All rights reserved.
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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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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed for the FreeBSD project
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* 4. Neither the name of the author nor the names of any co-contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY ANDREW GORDON AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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*/
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#include <sys/cdefs.h>
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#ifndef lint
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__RCSID("$NetBSD: lockd.c,v 1.7 2000/08/12 18:08:44 thorpej Exp $");
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#endif
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/*
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* main() function for NFS lock daemon. Most of the code in this
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* file was generated by running rpcgen /usr/include/rpcsvc/nlm_prot.x.
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*
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* The actual program logic is in the file lock_proc.c
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*/
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <err.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <errno.h>
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#include <syslog.h>
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#include <signal.h>
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#include <string.h>
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#include <unistd.h>
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#include <libutil.h>
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#include <netconfig.h>
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#include <rpc/rpc.h>
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#include <rpcsvc/sm_inter.h>
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#include "lockd.h"
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#include <rpcsvc/nlm_prot.h>
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int debug_level = 0; /* 0 = no debugging syslog() calls */
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int _rpcsvcdirty = 0;
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int grace_expired;
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int nsm_state;
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pid_t client_pid;
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struct mon mon_host;
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void init_nsm(void);
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int main __P((int, char **));
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void nlm_prog_0 __P((struct svc_req *, SVCXPRT *));
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void nlm_prog_1 __P((struct svc_req *, SVCXPRT *));
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void nlm_prog_3 __P((struct svc_req *, SVCXPRT *));
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void nlm_prog_4 __P((struct svc_req *, SVCXPRT *));
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void usage __P((void));
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void sigalarm_handler __P((void));
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const char *transports[] = { "udp", "tcp", "udp6", "tcp6" };
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int
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main(argc, argv)
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int argc;
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char **argv;
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{
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SVCXPRT *transp;
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int ch, i, maxindex, s;
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struct sigaction sigalarm;
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int grace_period = 30;
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struct netconfig *nconf;
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while ((ch = getopt(argc, argv, "d:g:")) != (-1)) {
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switch (ch) {
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case 'd':
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debug_level = atoi(optarg);
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if (!debug_level) {
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usage();
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/* NOTREACHED */
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}
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break;
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case 'g':
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grace_period = atoi(optarg);
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if (!grace_period) {
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usage();
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/* NOTREACHED */
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}
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break;
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default:
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case '?':
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usage();
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/* NOTREACHED */
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}
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}
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if (geteuid()) { /* This command allowed only to root */
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fprintf(stderr, "Sorry. You are not superuser\n");
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exit(1);
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}
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(void)rpcb_unset(NLM_PROG, NLM_SM, NULL);
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(void)rpcb_unset(NLM_PROG, NLM_VERS, NULL);
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(void)rpcb_unset(NLM_PROG, NLM_VERSX, NULL);
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(void)rpcb_unset(NLM_PROG, NLM_VERS4, NULL);
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/*
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* Check if IPv6 support is present.
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*/
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s = socket(AF_INET6, SOCK_DGRAM, IPPROTO_UDP);
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if (s < 0)
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maxindex = 2;
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else {
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close(s);
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maxindex = 4;
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}
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for (i = 0; i < maxindex; i++) {
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nconf = getnetconfigent(transports[i]);
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if (nconf == NULL)
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errx(1, "cannot get udp netconf.");
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transp = svc_tli_create(RPC_ANYFD, nconf, NULL, 0, 0);
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if (transp == NULL) {
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errx(1, "cannot create %s service.", transports[i]);
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/* NOTREACHED */
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}
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if (!svc_reg(transp, NLM_PROG, NLM_SM, nlm_prog_0, nconf)) {
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errx(1, "unable to register (NLM_PROG, NLM_SM, %s)",
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transports[i]);
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/* NOTREACHED */
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}
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if (!svc_reg(transp, NLM_PROG, NLM_VERS, nlm_prog_1, nconf)) {
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errx(1, "unable to register (NLM_PROG, NLM_VERS, %s)",
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transports[i]);
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/* NOTREACHED */
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}
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if (!svc_reg(transp, NLM_PROG, NLM_VERSX, nlm_prog_3, nconf)) {
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errx(1, "unable to register (NLM_PROG, NLM_VERSX, %s)",
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transports[i]);
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/* NOTREACHED */
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}
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if (!svc_reg(transp, NLM_PROG, NLM_VERS4, nlm_prog_4, nconf)) {
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errx(1, "unable to register (NLM_PROG, NLM_VERS4, %s)",
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transports[i]);
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/* NOTREACHED */
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}
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freenetconfigent(nconf);
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}
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/*
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* Note that it is NOT sensible to run this program from inetd - the
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* protocol assumes that it will run immediately at boot time.
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*/
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if (daemon(0, 0)) {
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err(1, "cannot fork");
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/* NOTREACHED */
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}
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openlog("rpc.lockd", 0, LOG_DAEMON);
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if (debug_level)
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syslog(LOG_INFO, "Starting, debug level %d", debug_level);
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else
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syslog(LOG_INFO, "Starting");
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sigalarm.sa_handler = (sig_t) sigalarm_handler;
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sigemptyset(&sigalarm.sa_mask);
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sigalarm.sa_flags = SA_RESETHAND; /* should only happen once */
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sigalarm.sa_flags |= SA_RESTART;
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if (sigaction(SIGALRM, &sigalarm, NULL) != 0) {
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syslog(LOG_WARNING, "sigaction(SIGALRM) failed: %s",
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strerror(errno));
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exit(1);
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}
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grace_expired = 0;
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alarm(10);
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init_nsm();
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client_pid = client_request();
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svc_run(); /* Should never return */
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exit(1);
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}
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void
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sigalarm_handler(void)
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{
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grace_expired = 1;
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}
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void
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usage()
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{
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errx(1, "usage: rpc.lockd [-d <debuglevel>] [-g <grace period>]");
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}
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/*
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* init_nsm --
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* Reset the NSM state-of-the-world and acquire its state.
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*/
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void
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init_nsm(void)
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{
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enum clnt_stat ret;
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my_id id;
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sm_stat stat;
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/*
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* !!!
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* The my_id structure isn't used by the SM_UNMON_ALL call, as far
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* as I know. Leave it empty for now.
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*/
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memset(&id, 0, sizeof(id));
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id.my_name = "NFS NLM";
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/*
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* !!!
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* The statd program must already be registered when lockd runs.
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*/
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do {
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ret = callrpc("localhost", SM_PROG, SM_VERS, SM_UNMON_ALL,
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xdr_my_id, &id, xdr_sm_stat, &stat);
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if (ret == RPC_PROGUNAVAIL) {
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warnx("%lu %s", SM_PROG, clnt_sperrno(ret));
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sleep(2);
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continue;
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}
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break;
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} while (0);
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if (ret != 0) {
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errx(1, "%lu %s", SM_PROG, clnt_sperrno(ret));
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}
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nsm_state = stat.state;
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/* setup constant data for SM_MON calls */
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mon_host.mon_id.my_id.my_name = "localhost";
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mon_host.mon_id.my_id.my_prog = NLM_PROG;
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mon_host.mon_id.my_id.my_vers = NLM_SM;
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mon_host.mon_id.my_id.my_proc = NLM_SM_NOTIFY; /* bsdi addition */
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}
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