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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 <stdio.h>
#include <rpc/rpc.h>
#include <syslog.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <signal.h>
#include "statd.h"
#ifndef lint
static char rcsid[] = "$id: $";
#endif /* not lint */
int debug = 0; /* Controls syslog() calls for debug messages */
static void sm_prog_1();
static void handle_sigchld();
main(int argc, char **argv)
{
SVCXPRT *transp;
struct sigaction sa;
if (argc > 1)
{
if (strcmp(argv[1], "-d"))
{
fprintf(stderr, "Usage: rpc.statd [-d]\n");
exit(1);
}
debug = 1;
}
(void)pmap_unset(SM_PROG, SM_VERS);
transp = svcudp_create(RPC_ANYSOCK);
if (transp == NULL)
{
fprintf(stderr, "cannot create udp service.\n");
exit(1);
}
if (!svc_register(transp, SM_PROG, SM_VERS, sm_prog_1, IPPROTO_UDP))
{
fprintf(stderr, "unable to register (SM_PROG, SM_VERS, udp).\n");
exit(1);
}
transp = svctcp_create(RPC_ANYSOCK, 0, 0);
if (transp == NULL)
{
fprintf(stderr, "cannot create tcp service.\n");
exit(1);
}
if (!svc_register(transp, SM_PROG, SM_VERS, sm_prog_1, IPPROTO_TCP)) {
fprintf(stderr, "unable to register (SM_PROG, SM_VERS, tcp).\n");
exit(1);
}
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);
}
/* 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, int code, struct sigcontext *scp)
{
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));
}
/* sm_prog1 ---------------------------------------------------------------- */
/*
Purpose: Handle one RPC request
Returns: Nothing
Notes: Called from RPC libraray on receipt of a request.
Code for this function was auto-generated by rpcgen.
*/
static void
sm_prog_1(struct svc_req *rqstp, SVCXPRT *transp)
{
union
{
struct sm_name sm_stat_1_arg;
struct mon sm_mon_1_arg;
struct mon_id sm_unmon_1_arg;
struct my_id sm_unmon_all_1_arg;
struct stat_chge sm_notify_1_arg;
} argument;
char *result;
bool_t (*xdr_argument)(), (*xdr_result)();
char *(*local)();
switch (rqstp->rq_proc)
{
case NULLPROC:
(void)svc_sendreply(transp, xdr_void, (char *)NULL);
return;
case SM_STAT:
xdr_argument = xdr_sm_name;
xdr_result = xdr_sm_stat_res;
local = (char *(*)()) sm_stat_1;
break;
case SM_MON:
xdr_argument = xdr_mon;
xdr_result = xdr_sm_stat_res;
local = (char *(*)()) sm_mon_1;
break;
case SM_UNMON:
xdr_argument = xdr_mon_id;
xdr_result = xdr_sm_stat;
local = (char *(*)()) sm_unmon_1;
break;
case SM_UNMON_ALL:
xdr_argument = xdr_my_id;
xdr_result = xdr_sm_stat;
local = (char *(*)()) sm_unmon_all_1;
break;
case SM_SIMU_CRASH:
xdr_argument = xdr_void;
xdr_result = xdr_void;
local = (char *(*)()) sm_simu_crash_1;
break;
case SM_NOTIFY:
xdr_argument = xdr_stat_chge;
xdr_result = xdr_void;
local = (char *(*)()) sm_notify_1;
break;
default:
svcerr_noproc(transp);
return;
}
bzero((char *)&argument, sizeof(argument));
if (!svc_getargs(transp, xdr_argument, (caddr_t)&argument))
{
svcerr_decode(transp);
return;
}
result = (*local)(&argument, rqstp);
if (result != NULL && !svc_sendreply(transp, xdr_result, result))
{
svcerr_systemerr(transp);
}
if (!svc_freeargs(transp, xdr_argument, (caddr_t)&argument))
{
syslog(LOG_ERR, "unable to free arguments");
exit(1);
}
}
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