303 lines
7.0 KiB
C
303 lines
7.0 KiB
C
/*
|
|
* 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>
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
#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 */
|
|
|
|
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 */
|
|
}
|