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/* $OpenBSD: rstatd.c,v 1.16 2003/12/12 05:25:06 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.
*/
#ifndef lint
static char rcsid[] = "$OpenBSD: rstatd.c,v 1.16 2003/12/12 05:25:06 deraadt Exp $";
#endif /* not lint */
#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;
static void
getsig(int signo)
{
gotsig = 1;
}
static void
cleanup(void)
{
(void) pmap_unset(RSTATPROG, RSTATVERS_TIME); /* XXX signal races */
(void) pmap_unset(RSTATPROG, RSTATVERS_SWTCH);
(void) pmap_unset(RSTATPROG, RSTATVERS_ORIG);
_exit(0);
}
int
main(int argc, char *argv[])
{
int sock = 0, proto = 0;
socklen_t fromlen;
struct passwd *pw;
struct sockaddr_in from;
SVCXPRT *transp;
openlog("rpc.rstatd", LOG_NDELAY|LOG_CONS|LOG_PID, LOG_DAEMON);
pw = getpwnam("_rstatd");
if (!pw)
pw = getpwnam("nobody");
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);
fd_set *fds;
for (;;) {
if (wantupdatestat) {
updatestat();
wantupdatestat = 0;
}
if (gotsig)
cleanup();
if (__svc_fdset) {
int bytes = howmany(__svc_fdsetsize, NFDBITS) *
sizeof(fd_mask);
fds = (fd_set *)malloc(bytes); /* XXX */
memcpy(fds, __svc_fdset, bytes);
} else
fds = NULL;
switch (select(svc_maxfd+1, fds, 0, 0, (struct timeval *)0)) {
case -1:
if (errno == EINTR) {
if (fds)
free(fds);
continue;
}
perror("svc_run: - select failed");
if (fds)
free(fds);
return;
case 0:
if (fds)
free(fds);
continue;
default:
svc_getreqset2(fds, svc_maxfd+1);
free(fds);
}
}
}
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