xref: /illumos-gate/usr/src/cmd/ypcmd/ypxfrd_svc.c (revision 2a8bcb4e)

/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License, Version 1.0 only
 * (the "License").  You may not use this file except in compliance
 * with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*
 * Copyright 2005 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 *
 */

/*
 * This source was formally rpcgen generated, but has been
 * checked in.
 */

#include "ypxfrd.h"
#include <stdio.h>
#include <stdlib.h> /* getenv, exit */
#include <signal.h>
#include <rpc/pmap_clnt.h> /* for pmap_unset */
#include <string.h> /* strcmp */
#include <unistd.h> /* setsid */
#include <sys/types.h>
#include <memory.h>
#include <stropts.h>
#include <netconfig.h>
#include <sys/resource.h> /* rlimit */
#include <syslog.h>
#include <ndbm.h>
#include "shim.h"
#include "yptol.h"

#ifndef SIG_PF
#define	SIG_PF void(*)(int)
#endif

#ifdef DEBUG
#define	RPC_SVC_FG
#endif

#define	_RPCSVC_CLOSEDOWN 120

/*
 * Copyr 1989 Sun Micro
 * #ident	"@(#)ypxfrd.x	1.2	00/05/01 SMI"
 * This is NOT source code!
 * DO NOT EDIT THIS FILE!
 */
static int _rpcpmstart;		/* Started by a port monitor ? */

/* States a server can be in wrt request */

#define	_IDLE 0
#define	_SERVED 1

static int _rpcsvcstate = _IDLE;	/* Set when a request is serviced */
static int _rpcsvccount = 0;		/* Number of requests being serviced */

static void
_msgout(char *msg)
{
#ifdef RPC_SVC_FG
	if (_rpcpmstart)
		syslog(LOG_ERR, "%s", msg);
	else
		(void) fprintf(stderr, "%s\n", msg);
#else
	syslog(LOG_ERR, "%s", msg);
#endif
}

static void
closedown(int sig)
{
	if (_rpcsvcstate == _IDLE && _rpcsvccount == 0) {
		int size;
		int i, openfd = 0;

		size = svc_max_pollfd;
		for (i = 0; i < size && openfd < 2; i++)
			if (svc_pollfd[i].fd >= 0)
				openfd++;
		if (openfd <= 1)
			exit(0);
	} else
		_rpcsvcstate = _IDLE;

	(void) signal(SIGALRM, (SIG_PF) closedown);
	(void) alarm(_RPCSVC_CLOSEDOWN/2);
}

static void
ypxfrd_1(struct svc_req *rqstp, register SVCXPRT *transp)
{
	union {
		hosereq getdbm_1_arg;
	} argument;
	char *result;
	xdrproc_t _xdr_argument, _xdr_result;
	char *(*local)(char *, struct svc_req *);

	_rpcsvccount++;
	switch (rqstp->rq_proc) {
	case NULLPROC:
		(void) svc_sendreply(transp,
			(xdrproc_t)xdr_void, (char *)NULL);
		_rpcsvccount--;
		_rpcsvcstate = _SERVED;
		return;

	case getdbm:
		_xdr_argument = (xdrproc_t)xdr_hosereq;
		_xdr_result = (xdrproc_t)xdr_dbmfyl;
		local = (char *(*)(char *, struct svc_req *)) getdbm_1_svc;
		break;

	default:
		svcerr_noproc(transp);
		_rpcsvccount--;
		_rpcsvcstate = _SERVED;
		return;
	}
	(void) memset((char *)&argument, 0, sizeof (argument));
	if (!svc_getargs(transp, _xdr_argument, (caddr_t)&argument)) {
		svcerr_decode(transp);
		_rpcsvccount--;
		_rpcsvcstate = _SERVED;
		return;
	}
	result = (*local)((char *)&argument, rqstp);
	if (_xdr_result && result != NULL &&
		!svc_sendreply(transp, _xdr_result, result)) {
		svcerr_systemerr(transp);
	}
	if (!svc_freeargs(transp, _xdr_argument, (caddr_t)&argument)) {
		_msgout("unable to free arguments");
		exit(1);
	}
	_rpcsvccount--;
	_rpcsvcstate = _SERVED;
}

int
main()
{
	pid_t pid;
	int i;
	int stat;

	(void) sigset(SIGPIPE, SIG_IGN);

	/*
	 * If stdin looks like a TLI endpoint, we assume
	 * that we were started by a port monitor. If
	 * t_getstate fails with TBADF, this is not a
	 * TLI endpoint.
	 */
	if (t_getstate(0) != -1 || t_errno != TBADF) {
		char *netid;
		struct netconfig *nconf = NULL;
		SVCXPRT *transp;
		int pmclose;

		_rpcpmstart = 1;
		openlog("ypxfrd", LOG_NDELAY|LOG_PID, LOG_DAEMON);

		if ((netid = getenv("NLSPROVIDER")) == NULL) {
		/* started from inetd */
			pmclose = 1;
		} else {
			if ((nconf = getnetconfigent(netid)) == NULL)
				_msgout("cannot get transport info");

			pmclose = (t_getstate(0) != T_DATAXFER);
		}
		if ((transp = svc_tli_create(0, nconf, NULL, 0, 0)) == NULL) {
			_msgout("cannot create server handle");
			exit(1);
		}
		if (nconf)
			freenetconfigent(nconf);
		if (!svc_reg(transp, YPXFRD, V1, ypxfrd_1, 0)) {
			_msgout("unable to register (YPXFRD, V1).");
			exit(1);
		}
		if (pmclose) {
			(void) signal(SIGALRM, (SIG_PF) closedown);
			(void) alarm(_RPCSVC_CLOSEDOWN/2);
		}

		if (yptol_mode) {
			stat = parseConfig(NULL, NTOL_MAP_FILE);
			if (stat == 1) {
				_msgout("NIS to LDAP mapping inactive.");
			} else if (stat != 0) {
				_msgout("Aborting after NIS to LDAP "
					"mapping error.");
				exit(1);
			}
		}

		svc_run();
		exit(1);
		/* NOTREACHED */
	}	else {
#ifndef RPC_SVC_FG
#pragma weak closefrom
		extern void closefrom();
		int size;
		struct rlimit rl;
		pid = fork();
		if (pid < 0) {
			perror("cannot fork");
			exit(1);
		}
		if (pid)
			exit(0);
		closelog();
		if (closefrom != NULL)
			closefrom(0);
		else {
			rl.rlim_max = 0;
			getrlimit(RLIMIT_NOFILE, &rl);
			if ((size = rl.rlim_max) == 0)
				exit(1);
			for (i = 0; i < size; i++)
				(void) close(i);
		}
		i = open("/dev/null", 2);
		(void) dup2(i, 1);
		(void) dup2(i, 2);
		openlog("ypxfrd", LOG_NDELAY|LOG_PID, LOG_DAEMON);
		setsid();
#endif
	}

	if (yptol_mode) {
		stat = parseConfig(NULL, NTOL_MAP_FILE);
		if (stat == 1) {
			_msgout("NIS to LDAP mapping inactive.");
		} else if (stat != 0) {
			_msgout("Aborting after NIS to LDAP mapping error.");
			exit(1);
		}
	}

	if (!svc_create(ypxfrd_1, YPXFRD, V1, "visible")) {
		_msgout("unable to create (YPXFRD, V1) for visible.");
		exit(1);
	}

	svc_run();
	_msgout("svc_run returned");
	exit(1);
	/* NOTREACHED */
}