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/*
* 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.
*
*/
/* main() function for status monitor daemon. Some of the code in this */
/* file was generated by running rpcgen /usr/include/rpcsvc/sm_inter.x */
/* The actual program logic is in the file procs.c */
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <err.h>
#include <stdio.h>
#include <stdlib.h>
#include <rpc/rpc.h>
#include <rpc/rpc_com.h>
#include <string.h>
#include <syslog.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <signal.h>
#include <unistd.h>
#include "statd.h"
int debug = 0; /* Controls syslog() calls for debug messages */
extern void sm_prog_1(struct svc_req *rqstp, SVCXPRT *transp);
static void handle_sigchld(int sig);
static void usage(void);
int
main(int argc, char **argv)
{
struct sigaction sa;
int ch;
int maxrec = RPC_MAXDATASIZE;
while ((ch = getopt(argc, argv, "d")) != -1)
switch (ch) {
case 'd':
debug = 1;
break;
default:
usage();
}
argc -= optind;
argv += optind;
(void)rpcb_unset(SM_PROG, SM_VERS, NULL);
rpc_control(RPC_SVC_CONNMAXREC_SET, &maxrec);
if (!svc_create(sm_prog_1, SM_PROG, SM_VERS, "udp"))
errx(1, "cannot create udp service");
if (!svc_create(sm_prog_1, SM_PROG, SM_VERS, "tcp"))
errx(1, "cannot create tcp service");
init_file("/var/db/statd.status");
/* Note that it is NOT sensible to run this program from inetd - the */
/* protocol assumes that it will run immediately at boot time. */
daemon(0, 0);
openlog("rpc.statd", 0, LOG_DAEMON);
if (debug) syslog(LOG_INFO, "Starting - debug enabled");
else syslog(LOG_INFO, "Starting");
/* Install signal handler to collect exit status of child processes */
sa.sa_handler = handle_sigchld;
sigemptyset(&sa.sa_mask);
sigaddset(&sa.sa_mask, SIGCHLD);
sa.sa_flags = SA_RESTART;
sigaction(SIGCHLD, &sa, NULL);
/* Initialisation now complete - start operating */
notify_hosts(); /* Forks a process (if necessary) to do the */
/* SM_NOTIFY calls, which may be slow. */
svc_run(); /* Should never return */
exit(1);
}
static void
usage()
{
fprintf(stderr, "usage: rpc.statd [-d]\n");
exit(1);
}
/* handle_sigchld ---------------------------------------------------------- */
/*
Purpose: Catch SIGCHLD and collect process status
Retruns: Nothing.
Notes: No special action required, other than to collect the
process status and hence allow the child to die:
we only use child processes for asynchronous transmission
of SM_NOTIFY to other systems, so it is normal for the
children to exit when they have done their work.
*/
static void handle_sigchld(int sig __unused)
{
int pid, status;
pid = wait4(-1, &status, WNOHANG, (struct rusage*)0);
if (!pid) syslog(LOG_ERR, "Phantom SIGCHLD??");
else if (status == 0)
{
if (debug) syslog(LOG_DEBUG, "Child %d exited OK", pid);
}
else syslog(LOG_ERR, "Child %d failed with status %d", pid,
WEXITSTATUS(status));
}
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