298 lines
6.9 KiB
C
298 lines
6.9 KiB
C
/*
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* Copyright (c) 1995, 1996
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* Bill Paul <wpaul@ctr.columbia.edu>. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Bill Paul.
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* 4. Neither the name of the author nor the names of any co-contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL Bill Paul OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef lint
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static const char rcsid[] =
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"$Id$";
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#endif /* not lint */
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#include "ypxfrd.h"
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#include <err.h>
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#include <fcntl.h>
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#include <stdio.h>
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#include <stdlib.h> /* getenv, exit */
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#include <unistd.h>
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#include <rpc/pmap_clnt.h> /* for pmap_unset */
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#include <string.h> /* strcmp */
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#include <signal.h>
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#include <sys/ttycom.h> /* TIOCNOTTY */
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#ifdef __cplusplus
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#include <sysent.h> /* getdtablesize, open */
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#endif /* __cplusplus */
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#include <memory.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <syslog.h>
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#include "ypxfrd_extern.h"
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#include <sys/wait.h>
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#include <errno.h>
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#ifndef SIG_PF
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#define SIG_PF void(*)(int)
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#endif
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#ifdef DEBUG
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#define RPC_SVC_FG
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#endif
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#define _RPCSVC_CLOSEDOWN 120
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int _rpcpmstart; /* Started by a port monitor ? */
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static int _rpcfdtype;
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/* Whether Stream or Datagram ? */
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/* States a server can be in wrt request */
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#define _IDLE 0
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#define _SERVED 1
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#define _SERVING 2
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extern int _rpcsvcstate; /* Set when a request is serviced */
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char *progname = "rpc.ypxfrd";
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char *yp_dir = "/var/yp/";
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static
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void _msgout(char* msg)
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{
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#ifdef RPC_SVC_FG
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if (_rpcpmstart)
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syslog(LOG_ERR, msg);
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else
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warnx("%s", msg);
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#else
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syslog(LOG_ERR, msg);
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#endif
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}
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static void
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closedown(int sig)
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{
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if (_rpcsvcstate == _IDLE) {
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extern fd_set svc_fdset;
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static int size;
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int i, openfd;
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if (_rpcfdtype == SOCK_DGRAM)
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exit(0);
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if (size == 0) {
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size = getdtablesize();
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}
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for (i = 0, openfd = 0; i < size && openfd < 2; i++)
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if (FD_ISSET(i, &svc_fdset))
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openfd++;
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if (openfd <= 1)
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exit(0);
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}
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if (_rpcsvcstate == _SERVED)
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_rpcsvcstate = _IDLE;
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(void) signal(SIGALRM, (SIG_PF) closedown);
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(void) alarm(_RPCSVC_CLOSEDOWN/2);
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}
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static void
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ypxfrd_svc_run()
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{
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#ifdef FD_SETSIZE
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fd_set readfds;
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#else
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int readfds;
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#endif /* def FD_SETSIZE */
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extern int forked;
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int pid;
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int fd_setsize = _rpc_dtablesize();
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/* Establish the identity of the parent ypserv process. */
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pid = getpid();
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for (;;) {
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#ifdef FD_SETSIZE
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readfds = svc_fdset;
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#else
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readfds = svc_fds;
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#endif /* def FD_SETSIZE */
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switch (select(fd_setsize, &readfds, NULL, NULL,
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(struct timeval *)0)) {
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case -1:
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if (errno == EINTR) {
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continue;
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}
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warn("svc_run: - select failed");
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return;
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case 0:
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continue;
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default:
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svc_getreqset(&readfds);
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if (forked && pid != getpid())
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exit(0);
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}
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}
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}
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static void reaper(sig)
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int sig;
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{
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int status;
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if (sig == SIGHUP) {
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load_securenets();
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return;
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}
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if (sig == SIGCHLD) {
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while (wait3(&status, WNOHANG, NULL) > 0)
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children--;
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} else {
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(void) pmap_unset(YPXFRD_FREEBSD_PROG, YPXFRD_FREEBSD_VERS);
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exit(0);
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}
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}
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void usage()
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{
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fprintf(stderr, "usage: rpc.ypxfrd [-p path]\n");
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exit(0);
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}
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int
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main(argc, argv)
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int argc;
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char *argv[];
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{
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register SVCXPRT *transp = NULL;
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int sock;
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int proto = 0;
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struct sockaddr_in saddr;
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int asize = sizeof (saddr);
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int ch;
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while ((ch = getopt(argc, argv, "p:h")) != -1) {
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switch(ch) {
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case 'p':
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yp_dir = optarg;
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break;
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default:
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usage();
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break;
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}
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}
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load_securenets();
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if (getsockname(0, (struct sockaddr *)&saddr, &asize) == 0) {
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int ssize = sizeof (int);
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if (saddr.sin_family != AF_INET)
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exit(1);
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if (getsockopt(0, SOL_SOCKET, SO_TYPE,
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(char *)&_rpcfdtype, &ssize) == -1)
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exit(1);
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sock = 0;
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_rpcpmstart = 1;
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proto = 0;
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openlog("rpc.ypxfrd", LOG_PID, LOG_DAEMON);
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} else {
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#ifndef RPC_SVC_FG
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int size;
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int pid, i;
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pid = fork();
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if (pid < 0)
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err(1, "fork");
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if (pid)
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exit(0);
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size = getdtablesize();
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for (i = 0; i < size; i++)
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(void) close(i);
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i = open("/dev/console", 2);
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(void) dup2(i, 1);
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(void) dup2(i, 2);
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i = open("/dev/tty", 2);
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if (i >= 0) {
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(void) ioctl(i, TIOCNOTTY, (char *)NULL);
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(void) close(i);
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}
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openlog("rpc.ypxfrd", LOG_PID, LOG_DAEMON);
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#endif
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sock = RPC_ANYSOCK;
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(void) pmap_unset(YPXFRD_FREEBSD_PROG, YPXFRD_FREEBSD_VERS);
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}
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if ((_rpcfdtype == 0) || (_rpcfdtype == SOCK_DGRAM)) {
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transp = svcudp_create(sock);
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if (transp == NULL) {
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_msgout("cannot create udp service.");
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exit(1);
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}
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if (!_rpcpmstart)
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proto = IPPROTO_UDP;
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if (!svc_register(transp, YPXFRD_FREEBSD_PROG, YPXFRD_FREEBSD_VERS, ypxfrd_freebsd_prog_1, proto)) {
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_msgout("unable to register (YPXFRD_FREEBSD_PROG, YPXFRD_FREEBSD_VERS, udp).");
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exit(1);
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}
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}
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if ((_rpcfdtype == 0) || (_rpcfdtype == SOCK_STREAM)) {
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transp = svctcp_create(sock, 0, 0);
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if (transp == NULL) {
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_msgout("cannot create tcp service.");
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exit(1);
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}
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if (!_rpcpmstart)
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proto = IPPROTO_TCP;
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if (!svc_register(transp, YPXFRD_FREEBSD_PROG, YPXFRD_FREEBSD_VERS, ypxfrd_freebsd_prog_1, proto)) {
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_msgout("unable to register (YPXFRD_FREEBSD_PROG, YPXFRD_FREEBSD_VERS, tcp).");
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exit(1);
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}
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}
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if (transp == (SVCXPRT *)NULL) {
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_msgout("could not create a handle");
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exit(1);
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}
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if (_rpcpmstart) {
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(void) signal(SIGALRM, (SIG_PF) closedown);
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(void) alarm(_RPCSVC_CLOSEDOWN/2);
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}
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(void) signal(SIGPIPE, SIG_IGN);
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(void) signal(SIGCHLD, (SIG_PF) reaper);
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(void) signal(SIGTERM, (SIG_PF) reaper);
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(void) signal(SIGINT, (SIG_PF) reaper);
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(void) signal(SIGHUP, (SIG_PF) reaper);
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ypxfrd_svc_run();
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_msgout("svc_run returned");
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exit(1);
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/* NOTREACHED */
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}
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