cmd/getent/dogetnetmask.c

/*
 * 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
 */
#ident  "%Z%%M% %I% %E% SMI"

/*
 * Copyright (c) 1994-1996, by Sun Microsystems, Inc.
 * All rights reserved.
 */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netdb.h>
#include "getent.h"

extern char *inet_nettoa(struct in_addr in);

static int
putnetmask(const struct in_addr key, const struct in_addr netmask, FILE *fp)
{
    char **p;
    int rc = 0;
    struct in_addr net;

    net.s_addr = ntohl(key.s_addr);
    if (fprintf(fp, "%-20s", inet_nettoa(net)) == EOF)
        rc = 1;
    if (fprintf(fp, " %s", inet_ntoa(netmask)) == EOF)
        rc = 1;
    if (putc('\n', fp) == EOF)
        rc = 1;
    return (rc);
}

/*
 * getnetmaskbyaddr - get entries from network database
 */
int
dogetnetmask(const char **list)
{
    int rc = EXC_SUCCESS;
    struct in_addr addr, netmask;

    if (list == NULL || *list == NULL)
        return (EXC_ENUM_NOT_SUPPORTED);

    for (; *list != NULL; list++) {
        addr.s_addr = htonl(inet_network(*list));
        if (addr.s_addr != -1) {
            if (getnetmaskbyaddr(addr, &netmask) == 0) {
                (void) putnetmask(addr, netmask, stdout);
            } else {
                rc = EXC_NAME_NOT_FOUND;
            }
        } else {
            rc = EXC_NAME_NOT_FOUND;
        }
    }

    return (rc);
}