/*-
* SPDX-License-Identifier: BSD-4-Clause
*
* Copyright (c) 1995, 1996
* Bill Paul <wpaul@ctr.columbia.edu>. 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 by Bill Paul.
* 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 Bill Paul 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 Bill Paul 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/cdefs.h>
#include "ypxfrd.h"
#include <err.h>
#include <fcntl.h>
#include <paths.h>
#include <stdio.h>
#include <stdlib.h> /* getenv, exit */
#include <unistd.h>
#include <rpc/pmap_clnt.h> /* for pmap_unset */
#include <rpc/rpc_com.h>
#include <string.h> /* strcmp */
#include <signal.h>
#include <sys/ttycom.h> /* TIOCNOTTY */
#ifdef __cplusplus
#include <sysent.h> /* getdtablesize, open */
#endif /* __cplusplus */
#include <memory.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <syslog.h>
#include "ypxfrd_extern.h"
#include <sys/wait.h>
#include <errno.h>
#ifndef SIG_PF
#define SIG_PF void(*)(int)
#endif
#ifdef DEBUG
#define RPC_SVC_FG
#endif
#define _RPCSVC_CLOSEDOWN 120
int _rpcpmstart; /* Started by a port monitor ? */
static int _rpcfdtype;
/* Whether Stream or Datagram ? */
/* States a server can be in wrt request */
#define _IDLE 0
#define _SERVED 1
#define _SERVING 2
extern int _rpcsvcstate; /* Set when a request is serviced */
int debug;
char *progname = "rpc.ypxfrd";
char *yp_dir = "/var/yp/";
static void
_msgout(char *msg)
{
#ifdef RPC_SVC_FG
if (_rpcpmstart)
syslog(LOG_ERR, "%s", msg);
else
warnx("%s", msg);
#else
syslog(LOG_ERR, "%s", msg);
#endif
}
static void
closedown(int sig)
{
if (_rpcsvcstate == _IDLE) {
extern fd_set svc_fdset;
static int size;
int i, openfd;
if (_rpcfdtype == SOCK_DGRAM)
exit(0);
if (size == 0) {
size = getdtablesize();
}
for (i = 0, openfd = 0; i < size && openfd < 2; i++)
if (FD_ISSET(i, &svc_fdset))
openfd++;
if (openfd <= 1)
exit(0);
}
if (_rpcsvcstate == _SERVED)
_rpcsvcstate = _IDLE;
(void) signal(SIGALRM, (SIG_PF) closedown);
(void) alarm(_RPCSVC_CLOSEDOWN/2);
}
static void
ypxfrd_svc_run(void)
{
#ifdef FD_SETSIZE
fd_set readfds;
#else
int readfds;
#endif /* def FD_SETSIZE */
extern int forked;
int pid;
int fd_setsize = _rpc_dtablesize();
/* Establish the identity of the parent ypserv process. */
pid = getpid();
for (;;) {
#ifdef FD_SETSIZE
readfds = svc_fdset;
#else
readfds = svc_fds;
#endif /* def FD_SETSIZE */
switch (select(fd_setsize, &readfds, NULL, NULL,
(struct timeval *)0)) {
case -1:
if (errno == EINTR) {
continue;
}
warn("svc_run: - select failed");
return;
case 0:
continue;
default:
svc_getreqset(&readfds);
if (forked && pid != getpid())
exit(0);
}
}
}
static void reaper(int sig)
{
int status;
int saved_errno;
saved_errno = errno;
if (sig == SIGHUP) {
load_securenets();
errno = saved_errno;
return;
}
if (sig == SIGCHLD) {
while (wait3(&status, WNOHANG, NULL) > 0)
children--;
} else {
(void) pmap_unset(YPXFRD_FREEBSD_PROG, YPXFRD_FREEBSD_VERS);
exit(0);
}
errno = saved_errno;
return;
}
void
usage(void)
{
fprintf(stderr, "usage: rpc.ypxfrd [-p path]\n");
exit(0);
}
int
main(int argc, char *argv[])
{
register SVCXPRT *transp = NULL;
int sock;
int proto = 0;
struct sockaddr_in saddr;
int asize = sizeof (saddr);
int ch;
while ((ch = getopt(argc, argv, "p:h")) != -1) {
switch (ch) {
case 'p':
yp_dir = optarg;
break;
default:
usage();
break;
}
}
load_securenets();
if (getsockname(0, (struct sockaddr *)&saddr, &asize) == 0) {
int ssize = sizeof (int);
if (saddr.sin_family != AF_INET)
exit(1);
if (getsockopt(0, SOL_SOCKET, SO_TYPE,
(char *)&_rpcfdtype, &ssize) == -1)
exit(1);
sock = 0;
_rpcpmstart = 1;
proto = 0;
openlog("rpc.ypxfrd", LOG_PID, LOG_DAEMON);
} else {
#ifndef RPC_SVC_FG
int size;
int pid, i;
pid = fork();
if (pid < 0)
err(1, "fork");
if (pid)
exit(0);
size = getdtablesize();
for (i = 0; i < size; i++)
(void) close(i);
i = open(_PATH_CONSOLE, 2);
(void) dup2(i, 1);
(void) dup2(i, 2);
i = open(_PATH_TTY, 2);
if (i >= 0) {
(void) ioctl(i, TIOCNOTTY, (char *)NULL);
(void) close(i);
}
openlog("rpc.ypxfrd", LOG_PID, LOG_DAEMON);
#endif
sock = RPC_ANYSOCK;
(void) pmap_unset(YPXFRD_FREEBSD_PROG, YPXFRD_FREEBSD_VERS);
}
if ((_rpcfdtype == 0) || (_rpcfdtype == SOCK_DGRAM)) {
transp = svcudp_create(sock);
if (transp == NULL) {
_msgout("cannot create udp service.");
exit(1);
}
if (!_rpcpmstart)
proto = IPPROTO_UDP;
if (!svc_register(transp, YPXFRD_FREEBSD_PROG, YPXFRD_FREEBSD_VERS, ypxfrd_freebsd_prog_1, proto)) {
_msgout("unable to register (YPXFRD_FREEBSD_PROG, YPXFRD_FREEBSD_VERS, udp).");
exit(1);
}
}
if ((_rpcfdtype == 0) || (_rpcfdtype == SOCK_STREAM)) {
transp = svctcp_create(sock, 0, 0);
if (transp == NULL) {
_msgout("cannot create tcp service.");
exit(1);
}
if (!_rpcpmstart)
proto = IPPROTO_TCP;
if (!svc_register(transp, YPXFRD_FREEBSD_PROG, YPXFRD_FREEBSD_VERS, ypxfrd_freebsd_prog_1, proto)) {
_msgout("unable to register (YPXFRD_FREEBSD_PROG, YPXFRD_FREEBSD_VERS, tcp).");
exit(1);
}
}
if (transp == (SVCXPRT *)NULL) {
_msgout("could not create a handle");
exit(1);
}
if (_rpcpmstart) {
(void) signal(SIGALRM, (SIG_PF) closedown);
(void) alarm(_RPCSVC_CLOSEDOWN/2);
}
(void) signal(SIGPIPE, SIG_IGN);
(void) signal(SIGCHLD, (SIG_PF) reaper);
(void) signal(SIGTERM, (SIG_PF) reaper);
(void) signal(SIGINT, (SIG_PF) reaper);
(void) signal(SIGHUP, (SIG_PF) reaper);
ypxfrd_svc_run();
_msgout("svc_run returned");
exit(1);
/* NOTREACHED */
}
plain