/*      $NetBSD: rpc.yppasswdd.c,v 1.18 2017/05/04 16:26:09 sevan 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.
 */

#include <sys/cdefs.h>
#ifndef lint
__RCSID("$NetBSD: rpc.yppasswdd.c,v 1.18 2017/05/04 16:26:09 sevan Exp $");
#endif /* not lint */

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

#include <err.h>
#include <errno.h>
#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <signal.h>
#include <unistd.h>
#include <util.h>

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

#include "extern.h"

int     noshell, nogecos, nopw;
char    make_arg[_POSIX2_LINE_MAX] = "make";

void    yppasswddprog_1(struct svc_req *, SVCXPRT *);
__dead static void      usage(void);

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

        for (i = 1; i < argc; i++) {
                arg = argv[i];
                if (*arg++ != '-')
                        usage();
                if (strcmp("d", arg) == 0)
                        if (++i == argc)
                                usage();
                        else {
                                if (pw_setprefix(argv[i]) < 0)
                                        err(EXIT_FAILURE,NULL);
                        }
                else if (strcmp("noshell", arg) == 0)
                        noshell = 1;
                else if (strcmp("nogecos", arg) == 0)
                        nogecos = 1;
                else if (strcmp("nopw", arg) == 0)
                        nopw = 1;
                else if (strcmp("m", arg) == 0) {
                        int len;

                        len = strlen(make_arg);
                        if (++i == argc)
                                usage();
                        for (; i < argc; i++) {
                                int arglen;

                                arglen = strlen(argv[i]);
                                if ((len + arglen) > (int)(sizeof(make_arg) - 2))
                                        errx(EXIT_FAILURE, "%s", strerror(E2BIG));
                                make_arg[len++] = ' ';
                                (void)strcpy(&make_arg[len], argv[i]);
                                len += arglen;
                        }
                } else
                        usage();
        }

        if (daemon(0, 0))
                err(EXIT_FAILURE, "can't detach");
        pidfile(NULL);

        rpc_control(RPC_SVC_CONNMAXREC_SET, &maxrec);

        (void)pmap_unset(YPPASSWDPROG, YPPASSWDVERS);

        transp = svcudp_create(RPC_ANYSOCK);
        if (transp == NULL)
                errx(EXIT_FAILURE, "cannot create UDP service");

        if (!svc_register(transp, YPPASSWDPROG, YPPASSWDVERS, yppasswddprog_1,
            IPPROTO_UDP))
                errx(EXIT_FAILURE,
                    "unable to register YPPASSWDPROG/YPPASSWDVERS/UDP");

        transp = svctcp_create(RPC_ANYSOCK, RPC_MAXDATASIZE, RPC_MAXDATASIZE);
        if (transp == NULL)
                errx(EXIT_FAILURE, "cannot create TCP service");

        if (!svc_register(transp, YPPASSWDPROG, YPPASSWDVERS, yppasswddprog_1,
            IPPROTO_TCP))
                errx(EXIT_FAILURE,
                    "unable to register YPPASSWDPROG/YPPASSWDVERS/TCP");

        svc_run();
        errx(EXIT_FAILURE, "svc_run returned");
        /* NOTREACHED */
}

void
yppasswddprog_1(struct svc_req *rqstp, SVCXPRT *transp)
{
        union {
                yppasswd yppasswdproc_update_1_arg;
        } argument;

        switch (rqstp->rq_proc) {
        case NULLPROC:
                (void)svc_sendreply(transp, (xdrproc_t)xdr_void, NULL);
                return;

        case YPPASSWDPROC_UPDATE:
                /*
                 * We'd like this to look like a regular RPC
                 * stub, but we have to send the reply in the
                 * handler in order to avoid both signal race
                 * conditions locally and timeouts on the
                 * client.
                 */
                (void)memset(&argument, 0, sizeof(argument));
                if (!svc_getargs(transp, xdr_yppasswd, (caddr_t) & argument)) {
                        svcerr_decode(transp);
                        return;
                }
                make_passwd((yppasswd *)&argument, rqstp, transp);
                if (!svc_freeargs(transp, xdr_yppasswd, (caddr_t) &argument))
                        errx(EXIT_FAILURE, "unable to free arguments");
                return;
        }

        svcerr_noproc(transp);
}

void
usage(void)
{

        fprintf(stderr, "usage: %s [-d directory] [-noshell] [-nogecos] "
            "[-nopw] [-m arg1 [arg2 ...]]\n", getprogname());
        exit(EXIT_FAILURE);
}