/*-
 * SPDX-License-Identifier: BSD-4-Clause
 *
 * Copyright (c) 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>
#include <sys/fcntl.h>

#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <limits.h>
#include <db.h>
#include <unistd.h>
#include <rpcsvc/ypclnt.h>
#include <rpcsvc/ypupdate_prot.h>
#include "ypxfr_extern.h"
#include "ypupdated_extern.h"

static int
yp_domake(char *map, char *domain)
{
        int pid;

        switch ((pid = fork())) {
        case 0:
                execlp(MAP_UPDATE_PATH, MAP_UPDATE, map, domain, (char *)NULL);
                yp_error("couldn't exec map update process: %s",
                                                strerror(errno));
                exit(1);
                break;
        case -1:
                yp_error("fork() failed: %s", strerror(errno));
                return(YPERR_YPERR);
                break;
        default:
                children++;
                break;
        }

        return(0);
}

int
ypmap_update(char *netname, char *map, unsigned int op, unsigned int keylen,
    char *keyval, unsigned int datlen, char *datval)
{
        DB *dbp;
        DBT key = { NULL, 0 }, data = { NULL, 0 };
        char *yp_last = "YP_LAST_MODIFIED";
        char yplastbuf[32];
        char *domptr;
        int rval = 0;

        if ((domptr = strchr(netname, '@')) == NULL)
                return(ERR_ACCESS);
        domptr++;


        dbp = yp_open_db_rw(domptr, map, O_RDWR);
        if (dbp == NULL)
                return(ERR_DBASE);

        key.data = keyval;
        key.size = keylen;
        data.data = datval;
        data.size = datlen;

        switch (op) {
        case YPOP_DELETE: /* delete this entry */
                rval = yp_del_record(dbp, &key);
                if (rval == YP_TRUE)
                        rval = 0;
                break;
        case YPOP_INSERT: /* add, do not change */
                rval = yp_put_record(dbp, &key, &data, 0);
                if (rval == YP_TRUE)
                        rval = 0;
                break;
        case YPOP_STORE: /* add, or change */
                rval = yp_put_record(dbp, &key, &data, 1);
                if (rval == YP_TRUE)
                        rval = 0;
                break;
        case YPOP_CHANGE: /* change, do not add */
                if (yp_get_record(domptr, map, &key, &data, 0) != YP_TRUE) {
                        rval = ERR_KEY;
                        break;
                }
                rval = yp_put_record(dbp, &key, &data, 1);
                if (rval == YP_TRUE)
                        rval = 0;
                break;
        default:
                yp_error("unknown update command: (%d)", op);
        }

        if (rval) {
                (void)(dbp->close)(dbp);
                return(rval);
        }

        snprintf(yplastbuf, sizeof(yplastbuf), "%jd", (intmax_t)time(NULL));
        key.data = yp_last;
        key.size = strlen(yp_last);
        data.data = (char *)&yplastbuf;
        data.size = strlen(yplastbuf);
        if (yp_put_record(dbp, &key, &data, 1) != YP_TRUE) {
                yp_error("failed to update timestamp in %s/%s", domptr, map);
                (void)(dbp->close)(dbp);
                return(ERR_DBASE);
        }

        (void)(dbp->close)(dbp);
        return(yp_domake(map, domptr));
}