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/* $OpenBSD: rstatd.c,v 1.23 2009/10/27 23:59:31 deraadt Exp $ */
/*-
* Copyright (c) 1993, John Brezak
* 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. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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/types.h>
#include <sys/socket.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <signal.h>
#include <pwd.h>
#include <syslog.h>
#include <errno.h>
#include <stdlib.h>
#include <rpc/rpc.h>
#include <rpcsvc/rstat.h>
extern int __svc_fdsetsize;
extern fd_set *__svc_fdset;
extern void svc_getreqset2(fd_set *, int);
extern void rstat_service(struct svc_req *, SVCXPRT *);
void my_svc_run(void);
int from_inetd = 1; /* started from inetd ? */
int closedown = 20; /* how long to wait before going dormant */
volatile sig_atomic_t gotsig;
/* ARGSUSED */
static void
getsig(int signo)
{
gotsig = 1;
}
int
main(int argc, char *argv[])
{
int sock = 0, proto = 0;
socklen_t fromlen;
struct passwd *pw;
struct sockaddr_storage from;
SVCXPRT *transp;
openlog("rpc.rstatd", LOG_NDELAY|LOG_CONS|LOG_PID, LOG_DAEMON);
if ((pw = getpwnam("_rstatd")) == NULL) {
syslog(LOG_ERR, "no such user _rstatd");
exit(1);
}
if (chroot("/var/empty") == -1) {
syslog(LOG_ERR, "cannot chdir to /var/empty.");
exit(1);
}
chdir("/");
if (pw) {
setgroups(1, &pw->pw_gid);
setegid(pw->pw_gid);
setgid(pw->pw_gid);
seteuid(pw->pw_uid);
setuid(pw->pw_uid);
}
if (argc == 2)
closedown = atoi(argv[1]);
if (closedown <= 0)
closedown = 20;
/*
* See if inetd started us
*/
fromlen = sizeof(from);
if (getsockname(0, (struct sockaddr *)&from, &fromlen) < 0) {
from_inetd = 0;
sock = RPC_ANYSOCK;
proto = IPPROTO_UDP;
}
if (!from_inetd) {
daemon(0, 0);
(void)pmap_unset(RSTATPROG, RSTATVERS_TIME);
(void)pmap_unset(RSTATPROG, RSTATVERS_SWTCH);
(void)pmap_unset(RSTATPROG, RSTATVERS_ORIG);
(void) signal(SIGINT, getsig);
(void) signal(SIGTERM, getsig);
(void) signal(SIGHUP, getsig);
}
transp = svcudp_create(sock);
if (transp == NULL) {
syslog(LOG_ERR, "cannot create udp service.");
exit(1);
}
if (!svc_register(transp, RSTATPROG, RSTATVERS_TIME, rstat_service, proto)) {
syslog(LOG_ERR, "unable to register (RSTATPROG, RSTATVERS_TIME, udp).");
exit(1);
}
if (!svc_register(transp, RSTATPROG, RSTATVERS_SWTCH, rstat_service, proto)) {
syslog(LOG_ERR, "unable to register (RSTATPROG, RSTATVERS_SWTCH, udp).");
exit(1);
}
if (!svc_register(transp, RSTATPROG, RSTATVERS_ORIG, rstat_service, proto)) {
syslog(LOG_ERR, "unable to register (RSTATPROG, RSTATVERS_ORIG, udp).");
exit(1);
}
my_svc_run();
syslog(LOG_ERR, "svc_run returned");
exit(1);
}
void
my_svc_run(void)
{
extern volatile sig_atomic_t wantupdatestat;
extern void updatestat(void);
struct pollfd *pfd = NULL, *newp;
int nready, saved_max_pollfd = 0;
for (;;) {
if (wantupdatestat) {
wantupdatestat = 0;
updatestat();
}
if (gotsig) {
(void) pmap_unset(RSTATPROG, RSTATVERS_TIME);
(void) pmap_unset(RSTATPROG, RSTATVERS_SWTCH);
(void) pmap_unset(RSTATPROG, RSTATVERS_ORIG);
exit(0);
}
if (svc_max_pollfd > saved_max_pollfd) {
newp = realloc(pfd, sizeof(*pfd) * svc_max_pollfd);
if (newp == NULL) {
free(pfd);
perror("svc_run: - realloc failed");
return;
}
pfd = newp;
saved_max_pollfd = svc_max_pollfd;
}
memcpy(pfd, svc_pollfd, sizeof(*pfd) * svc_max_pollfd);
nready = poll(pfd, svc_max_pollfd, INFTIM);
switch (nready) {
case -1:
if (errno == EINTR)
continue;
perror("svc_run: - poll failed");
free(pfd);
return;
case 0:
continue;
default:
svc_getreq_poll(pfd, nready);
}
}
}
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