common/irs/getnetgrent.c

/*
 * Copyright (C) 2004, 2005, 2008  Internet Systems Consortium, Inc. ("ISC")
 * Copyright (C) 1996-1999, 2001, 2003  Internet Software Consortium.
 *
 * Permission to use, copy, modify, and/or 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: getnetgrent.c,v 1.6 2008/11/14 02:36:51 marka Exp $";
#endif /* LIBC_SCCS and not lint */

/* Imports */

#include "port_before.h"

#if !defined(__BIND_NOSTATIC)

#include <sys/types.h>

#include <netinet/in.h>
#include <arpa/nameser.h>

#include <errno.h>
#include <resolv.h>
#include <stdio.h>

#include <irs.h>

#include "port_after.h"

#include "irs_data.h"

/* Forward */

static struct net_data *init(void);


/* Public */

#ifndef SETNETGRENT_ARGS
#define SETNETGRENT_ARGS const char *netgroup
#endif
void
setnetgrent(SETNETGRENT_ARGS) {
    struct net_data *net_data = init();

    setnetgrent_p(netgroup, net_data);
}

void
endnetgrent(void) {
    struct net_data *net_data = init();

    endnetgrent_p(net_data);
}

#ifndef INNETGR_ARGS
#define INNETGR_ARGS const char *netgroup, const char *host, \
             const char *user, const char *domain
#endif
int
innetgr(INNETGR_ARGS) {
    struct net_data *net_data = init();

    return (innetgr_p(netgroup, host, user, domain, net_data));
}

int
getnetgrent(NGR_R_CONST char **host, NGR_R_CONST char **user,
        NGR_R_CONST char **domain)
{
    struct net_data *net_data = init();
    const char *ch, *cu, *cd;
    int ret;

    ret = getnetgrent_p(&ch, &cu, &cd, net_data);
    if (ret != 1)
        return (ret);

    DE_CONST(ch, *host);
    DE_CONST(cu, *user);
    DE_CONST(cd, *domain);
    return (ret);
}

/* Shared private. */

void
setnetgrent_p(const char *netgroup, struct net_data *net_data) {
    struct irs_ng *ng;

    if ((net_data != NULL) && ((ng = net_data->ng) != NULL))
        (*ng->rewind)(ng, netgroup);
}

void
endnetgrent_p(struct net_data *net_data) {
    struct irs_ng *ng;

    if (!net_data)
        return;
    if ((ng = net_data->ng) != NULL)
        (*ng->close)(ng);
    net_data->ng = NULL;
}

int
innetgr_p(const char *netgroup, const char *host,
      const char *user, const char *domain,
      struct net_data *net_data) {
    struct irs_ng *ng;

    if (!net_data || !(ng = net_data->ng))
        return (0);
    return ((*ng->test)(ng, netgroup, host, user, domain));
}

int
getnetgrent_p(const char **host, const char **user, const char **domain,
          struct net_data *net_data ) {
    struct irs_ng *ng;

    if (!net_data || !(ng = net_data->ng))
        return (0);
    return ((*ng->next)(ng, host, user, domain));
}

/* Private */

static struct net_data *
init(void) {
    struct net_data *net_data;

    if (!(net_data = net_data_init(NULL)))
        goto error;
    if (!net_data->ng) {
        net_data->ng = (*net_data->irs->ng_map)(net_data->irs);
        if (!net_data->ng) {
  error:
            errno = EIO;
            return (NULL);
        }
    }

    return (net_data);
}

#endif /*__BIND_NOSTATIC*/

/*! \file */