common/irs/nul_ng.c

/*
 * Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC")
 * Copyright (c) 1996,1999 by Internet Software Consortium.
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
 * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#if defined(LIBC_SCCS) && !defined(lint)
static const char rcsid[] = "$Id: nul_ng.c,v 1.3 2005/04/27 04:56:34 sra Exp $";
#endif

/*! \file
 * \brief
 * nul_ng.c - the netgroup accessor null map
 */

#include "port_before.h"

#include <sys/types.h>
#include <netinet/in.h>
#include <arpa/nameser.h>
#include <resolv.h>

#include <stdio.h>
#include <string.h>
#include <netdb.h>
#include <ctype.h>
#include <stdlib.h>
#include <errno.h>

#include <irs.h>
#include <isc/memcluster.h>

#include "port_after.h"

#include "irs_p.h"
#include "hesiod.h"
#include "dns_p.h"

/* Forward. */

static void         ng_close(struct irs_ng *);
static int      ng_next(struct irs_ng *, const char **,
                const char **, const char **);
static int      ng_test(struct irs_ng *,
                const char *, const char *,
                const char *, const char *);
static void     ng_rewind(struct irs_ng *, const char *);
static void     ng_minimize(struct irs_ng *);

/* Public. */

struct irs_ng *
irs_nul_ng(struct irs_acc *this) {
    struct irs_ng *ng;

    UNUSED(this);

    if (!(ng = memget(sizeof *ng))) {
        errno = ENOMEM;
        return (NULL);
    }
    memset(ng, 0x5e, sizeof *ng);
    ng->private = NULL;
    ng->close = ng_close;
    ng->next = ng_next;
    ng->test = ng_test;
    ng->rewind = ng_rewind;
    ng->minimize = ng_minimize;
    return (ng);
}

/* Methods. */

static void
ng_close(struct irs_ng *this) {
    memput(this, sizeof *this);
}

/* ARGSUSED */
static int
ng_next(struct irs_ng *this, const char **host, const char **user,
    const char **domain)
{
    UNUSED(this);
    UNUSED(host);
    UNUSED(user);
    UNUSED(domain);
    errno = ENOENT;
    return (-1);
}

static int
ng_test(struct irs_ng *this, const char *name,
    const char *user, const char *host, const char *domain)
{
    UNUSED(this);
    UNUSED(name);
    UNUSED(user);
    UNUSED(host);
    UNUSED(domain);
    errno = ENODEV;
    return (-1);
}

static void
ng_rewind(struct irs_ng *this, const char *netgroup) {
    UNUSED(this);
    UNUSED(netgroup);
    /* NOOP */
}

static void
ng_minimize(struct irs_ng *this) {
    UNUSED(this);
    /* NOOP */
}