/*      $OpenBSD: ypcat.c,v 1.16 2015/02/08 23:40:35 deraadt Exp $ */

/*-
 * SPDX-License-Identifier: BSD-2-Clause
 *
 * Copyright (c) 1992, 1993, 1996 Theo de Raadt <deraadt@theos.com>
 * 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/param.h>
#include <sys/types.h>
#include <sys/socket.h>

#include <ctype.h>
#include <err.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

#include <rpc/rpc.h>
#include <rpc/xdr.h>
#include <rpcsvc/yp.h>
#include <rpcsvc/ypclnt.h>

static const struct ypalias {
        char *alias, *name;
} ypaliases[] = {
        { "passwd", "passwd.byname" },
        { "master.passwd", "master.passwd.byname" },
        { "shadow", "shadow.byname" },
        { "group", "group.byname" },
        { "networks", "networks.byaddr" },
        { "hosts", "hosts.byaddr" },
        { "protocols", "protocols.bynumber" },
        { "services", "services.byname" },
        { "aliases", "mail.aliases" },
        { "ethers", "ethers.byname" },
};

static int key;

static void
usage(void)
{
        fprintf(stderr, "%s\n%s\n",
            "usage: ypcat [-kt] [-d domainname] mapname",
            "       ypcat -x");
        exit(1);
}

static int
printit(u_long instatus, char *inkey, int inkeylen, char *inval, int invallen,
    void *indata)
{
        if (instatus != YP_TRUE)
                return (instatus);
        if (key)
                printf("%*.*s ", inkeylen, inkeylen, inkey);
        printf("%*.*s\n", invallen, invallen, inval);
        return (0);
}

int
main(int argc, char *argv[])
{
        char *domain = NULL, *inmap;
        struct ypall_callback ypcb;
        int c, notrans, r;
        u_int i;

        notrans = key = 0;
        while ((c = getopt(argc, argv, "xd:kt")) != -1)
                switch (c) {
                case 'x':
                        for (i = 0; i < nitems(ypaliases); i++)
                                printf("Use \"%s\" for \"%s\"\n",
                                    ypaliases[i].alias, ypaliases[i].name);
                        exit(0);
                case 'd':
                        domain = optarg;
                        break;
                case 't':
                        notrans = 1;
                        break;
                case 'k':
                        key = 1;
                        break;
                default:
                        usage();
                }

        if (optind + 1 != argc)
                usage();

        if (domain == NULL)
                yp_get_default_domain(&domain);

        inmap = argv[optind];
        if (notrans == 0) {
                for (i = 0; i < nitems(ypaliases); i++)
                        if (strcmp(inmap, ypaliases[i].alias) == 0)
                                inmap = ypaliases[i].name;
        }
        ypcb.foreach = printit;
        ypcb.data = NULL;

        r = yp_all(domain, inmap, &ypcb);
        switch (r) {
        case 0:
                break;
        case YPERR_YPBIND:
                errx(1, "not running ypbind");
        default:
                errx(1, "no such map %s. Reason: %s",
                    inmap, yperr_string(r));
        }
        exit(0);
}