cmd/getent/dogetnet.c

	dogetnet.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
 */
#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);
}