OpenBSD-4.6/libexec/rpc.yppasswdd/rpc.yppasswdd.c

/*	$OpenBSD: rpc.yppasswdd.c,v 1.20 2008/05/17 23:31:52 sobrado Exp $	*/

/*
 * Copyright (c) 1994 Mats O Jansson <moj@stacken.kth.se>
 * 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.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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: rpc.yppasswdd.c,v 1.20 2008/05/17 23:31:52 sobrado Exp $";
#endif

#include <sys/types.h>
#include <sys/wait.h>

#include <signal.h>
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <errno.h>
#include <string.h>
#include <pwd.h>
#include <util.h>
#include <syslog.h>

#include <rpc/rpc.h>
#include <rpc/pmap_clnt.h>

#include "yppasswd.h"

static void yppasswddprog_1(struct svc_req *, SVCXPRT *);
void    sig_child(int);

int     noshell, nogecos, nopw, domake;
char    make_arg[1024] = "make";
char   *dir;

static void
usage(void)
{
	fprintf(stderr,
	    "usage: rpc.yppasswdd [-nogecos] [-nopw] [-noshell] [-d directory] "
	    "[-m arg ...]\n");
	exit(1);
}

int
main(int argc, char *argv[])
{
	SVCXPRT *transp;
	int     i = 1;

	while (i < argc) {
		if (argv[i][0] == '-') {
			if (strcmp("-noshell", argv[i]) == 0) {
				noshell = 1;
			} else if (strcmp("-nogecos", argv[i]) == 0) {
				nogecos = 1;
			} else if (strcmp("-nopw", argv[i]) == 0) {
				nopw = 1;
			} else if (strcmp("-m", argv[i]) == 0) {
				domake = 1;
				while (i < argc) {
					if (strlcat(make_arg, " ",
					    sizeof(make_arg)) >=
					    sizeof(make_arg) ||
					    strlcat(make_arg, argv[i],
					    sizeof(make_arg)) >=
					    sizeof(make_arg)) {
						(void) fprintf(stderr,
						    "-m argument too long.\n");
						exit(1);
					}
					i++;
				}
			} else if (strcmp("-d", argv[i]) == 0 &&
			    i < argc + 1) {
				i++;
				dir = argv[i];
			} else
				usage();
			i++;
		} else
			usage();
	}

	(void) daemon(0, 0);
	chdir("/etc");

	(void) pmap_unset(YPPASSWDPROG, YPPASSWDVERS);

	(void) signal(SIGCHLD, sig_child);

	transp = svcudp_create(RPC_ANYSOCK);
	if (transp == NULL) {
		syslog(LOG_ERR, "cannot create udp service");
		exit(1);
	}
	if (!svc_register(transp, YPPASSWDPROG, YPPASSWDVERS, yppasswddprog_1,
	    IPPROTO_UDP)) {
		syslog(LOG_ERR, "unable to register YPPASSWDPROG, YPPASSWDVERS, udp");
		exit(1);
	}
	transp = svctcp_create(RPC_ANYSOCK, 0, 0);
	if (transp == NULL) {
		syslog(LOG_ERR, "cannot create tcp service");
		exit(1);
	}
	if (!svc_register(transp, YPPASSWDPROG, YPPASSWDVERS, yppasswddprog_1,
	    IPPROTO_TCP)) {
		syslog(LOG_ERR, "unable to register YPPASSWDPROG, YPPASSWDVERS, tcp");
		exit(1);
	}
	svc_run();
	syslog(LOG_ERR, "svc_run returned");
	exit(1);
}

static void
yppasswddprog_1(struct svc_req *rqstp, SVCXPRT *transp)
{
	union {
		yppasswd yppasswdproc_update_1_arg;
	} argument;
	bool_t (*xdr_argument)(XDR *, yppasswd *);
	char   *(*local)(yppasswd *, struct svc_req *, SVCXPRT *);

	switch (rqstp->rq_proc) {
	case NULLPROC:
		(void) svc_sendreply(transp, xdr_void, (char *) NULL);
		return;
	case YPPASSWDPROC_UPDATE:
		xdr_argument = xdr_yppasswd;
		local = (char *(*)(yppasswd *, struct svc_req *,
		    SVCXPRT *)) yppasswdproc_update_1_svc;
		break;
	default:
		svcerr_noproc(transp);
		return;
	}
	bzero((char *) &argument, sizeof(argument));
	if (!svc_getargs(transp, xdr_argument, (caddr_t) & argument)) {
		svcerr_decode(transp);
		return;
	}
	(*local)(&argument.yppasswdproc_update_1_arg, rqstp, transp);
}

/* ARGSUSED */
void
sig_child(int signo)
{
	int save_errno = errno;

	while (wait3((int *) NULL, WNOHANG, (struct rusage *) NULL) > 0)
		;
	errno = save_errno;
}