/*
 * 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, 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"

/*
 * Print a network number such as 129.144
 */
char *
inet_nettoa(struct in_addr in)
{
        u_long addr = htonl(in.s_addr);
        u_char *up = (u_char *)&addr;
        static char result[256];

        /* Omit leading zeros */
        if (up[0]) {
                (void) sprintf(result, "%d.%d.%d.%d",
                    up[0], up[1], up[2], up[3]);
        } else if (up[1]) {
                (void) sprintf(result, "%d.%d.%d", up[1], up[2], up[3]);
        } else if (up[2]) {
                (void) sprintf(result, "%d.%d", up[2], up[3]);
        } else {
                (void) sprintf(result, "%d", up[3]);
        }
        return (result);
}

static int
putnetent(const struct netent *np, FILE *fp)
{
        char **p;
        int rc = 0;
        struct in_addr in;

        if (np == NULL) {
                return (1);
        }

        in.s_addr = np->n_net;
        if (fprintf(fp, "%-20s %s",
                    np->n_name, inet_nettoa(in)) == EOF)
                rc = 1;
        for (p = np->n_aliases; *p != 0; p++) {
                if (fprintf(fp, " %s", *p) == EOF)
                        rc = 1;
        }
        if (putc('\n', fp) == EOF)
                rc = 1;
        return (rc);
}

/*
 * getnetbyname/addr - get entries from network database
 */
int
dogetnet(const char **list)
{
        struct netent *np;
        int rc = EXC_SUCCESS;

        if (list == NULL || *list == NULL) {
                while ((np = getnetent()) != NULL)
                        (void) putnetent(np, stdout);
        } else {
                for (; *list != NULL; list++) {
                        long addr = inet_network(*list);
                        if (addr != -1)
                                np = getnetbyaddr(addr, AF_INET);
                        else
                                np = getnetbyname(*list);
                        if (np == NULL)
                                rc = EXC_NAME_NOT_FOUND;
                        else
                                (void) putnetent(np, stdout);
                }
        }

        return (rc);
}