cmd/ypcmd/ypalias.c

	ypalias.c revision 7c478bd95313f5f23a4c958a745db2134aa03244
/*
 * 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 2001 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

/*  Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T */
/*    All Rights Reserved   */

/*
 * Portions of this source code were derived from Berkeley
 * under license from the Regents of the University of
 * California.
 */

#pragma ident   "%Z%%M% %I% %E% SMI"

#include <stdio.h>
#include <string.h>
#include <limits.h>
#include <sys/types.h>
#include <sys/statvfs.h>
#include "ypsym.h"

#ifdef SYSVCONFIG
extern void sysvconfig();
#endif

extern int yp_getalias();

/*
 *  Given a domain name, return its system v alias.
 *  If there is no alias name in the alias file,
 *  create one. Rule of creation is to take the 1st
 *  NAME_MAX-4 characters and concatenate the last 4 characters.
 *  If the alias in the file is too long, trim off the end.
 */

static void
mkdomain_alias(name, result)
char *name, *result;
{
    int retval;
    char tmpbuf[MAXNAMLEN] = {NULL};

    retval = yp_getalias(name, result, NAME_MAX);
    if (retval == -1) {
        if ((int)strlen(name) > NAME_MAX) {
            strncpy(result, name, NAME_MAX-4);
            strncpy(&result[NAME_MAX-4],
                &name[strlen(name)-4], 4);
            result[NAME_MAX] = '\0';
        } else
            strcpy(result, name);
    } else if ((retval) && (int)strlen(result) > NAME_MAX) {
        strncpy(tmpbuf, result, NAME_MAX);
        strcpy(result, tmpbuf);
    }
}

/*
 *  Given a map name, return its system v alias .
 *  If there is no alias name in the alias file,
 *  create one. Rule of creation is to take the 1st
 *  MAXALIASLEN-4 characters and concatenate the last 4 characters.
 *  If the alias in the file is too long, trim off the end.
 */
static void
mkmap_alias(name, result)
char *name, *result;
{
    int retval;
    char tmpbuf[MAXNAMLEN] = {NULL};

    retval = yp_getalias(name, result, MAXALIASLEN);

    if (retval == -1) {
        if ((int)strlen(name) > MAXALIASLEN) {
            (void) strncpy(result, name, MAXALIASLEN-4);
            (void) strncpy(&result[MAXALIASLEN-4],
                &name[strlen(name)-4], 4);
            result[MAXALIASLEN] = '\0';
        } else
            (void) strcpy(result, name);
    } else if ((retval) && (int)strlen(result) > MAXALIASLEN) {
        (void) strncpy(tmpbuf, result, MAXALIASLEN);
        (void) strcpy(result, tmpbuf);
    }
}

#ifdef MAIN

/*
 * executed only for the command ypalias
 * and not when ypbind or ypserv make use
 * of this file.
 */

static char usage[] =
"Usage:\n\
    ypalias -d domainname\n\
    ypalias mapname\n";

main(argc, argv)
char **argv;
{
    char result[MAXNAMLEN] = {NULL};

#ifdef SYSVCONFIG
    sysvconfig();
#endif
    if (argc <= 1)
        goto err;
    if (strcmp(argv[1], "-d") == 0)
        if (argc == 3) mkdomain_alias(argv[2], (char *)&result);
        else goto err;
    else if (argc == 2)
        mkmap_alias(argv[1], (char *)&result);
    else
        goto err;
    (void) printf("%s", result);
    return (0);
err:
    (void) fprintf(stderr, usage);
    return (1);
}
#endif /* MAIN */