/*
 * Copyright (C) 2004, 2005, 2008  Internet Systems Consortium, Inc. ("ISC")
 * Copyright (C) 1998, 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.
 */

#include <port_before.h>
#if !defined(_REENTRANT) || !defined(DO_PTHREADS)
        static int getnetgrent_r_not_required = 0;
#else
#include <errno.h>
#include <string.h>
#include <stdio.h>
#include <sys/types.h>
#include <netinet/in.h>
#include <netdb.h>
#include <stdlib.h>
#include <port_after.h>

#ifdef NGR_R_RETURN
#ifndef NGR_R_PRIVATE
#define NGR_R_PRIVATE 0
#endif

static NGR_R_RETURN
copy_protoent(NGR_R_CONST char **, NGR_R_CONST char **, NGR_R_CONST char **,
              const char *, const char *, const char *, NGR_R_COPY_ARGS);

NGR_R_RETURN
innetgr_r(const char *netgroup, const char *host, const char *user,
          const char *domain) {
        char *ng, *ho, *us, *dom;

        DE_CONST(netgroup, ng);
        DE_CONST(host, ho);
        DE_CONST(user, us);
        DE_CONST(domain, dom);

        return (innetgr(ng, ho, us, dom));
}

/*%
 *      These assume a single context is in operation per thread.
 *      If this is not the case we will need to call irs directly
 *      rather than through the base functions.
 */

NGR_R_RETURN
getnetgrent_r(NGR_R_CONST char **machinep, NGR_R_CONST char **userp,
              NGR_R_CONST char **domainp, NGR_R_ARGS)
{
        NGR_R_CONST char *mp, *up, *dp;
        int res = getnetgrent(&mp, &up, &dp);

        if (res != 1)
                return (res);

        return (copy_protoent(machinep, userp, domainp,
                                mp, up, dp, NGR_R_COPY));
}

#if NGR_R_PRIVATE == 2
struct private {
        char *buf;
};

#endif
NGR_R_SET_RETURN
#ifdef NGR_R_SET_ARGS
setnetgrent_r(NGR_R_SET_CONST char *netgroup, NGR_R_SET_ARGS)
#else
setnetgrent_r(NGR_R_SET_CONST char *netgroup)
#endif
{
#if NGR_R_PRIVATE == 2
        struct private *p;
#endif
        char *tmp;
#if defined(NGR_R_SET_ARGS) && NGR_R_PRIVATE == 0
        UNUSED(buf);
        UNUSED(buflen);
#endif

        DE_CONST(netgroup, tmp);
        setnetgrent(tmp);

#if NGR_R_PRIVATE == 1
        *buf = NULL;
#elif NGR_R_PRIVATE == 2
        *buf = p = malloc(sizeof(struct private));
        if (p == NULL)
#ifdef NGR_R_SET_RESULT
                return (NGR_R_BAD);
#else
                return;
#endif
        p->buf = NULL;
#endif
#ifdef NGR_R_SET_RESULT
        return (NGR_R_SET_RESULT);
#endif
}

NGR_R_END_RETURN
#ifdef NGR_R_END_ARGS
endnetgrent_r(NGR_R_END_ARGS)
#else
endnetgrent_r(void)
#endif
{
#if NGR_R_PRIVATE == 2
        struct private *p = buf;
#endif
#if defined(NGR_R_SET_ARGS) && NGR_R_PRIVATE == 0
        UNUSED(buf);
        UNUSED(buflen);
#endif

        endnetgrent();
#if NGR_R_PRIVATE == 1
        if (*buf != NULL)
                free(*buf);
        *buf = NULL;
#elif NGR_R_PRIVATE == 2
        if (p->buf != NULL)
                free(p->buf);
        free(p);
#endif
        NGR_R_END_RESULT(NGR_R_OK);
}

/* Private */

static int
copy_protoent(NGR_R_CONST char **machinep, NGR_R_CONST char **userp,
              NGR_R_CONST char **domainp, const char *mp, const char *up,
              const char *dp, NGR_R_COPY_ARGS)
{
#if NGR_R_PRIVATE == 2
        struct private *p = buf;
#endif
        char *cp;
        int n;
        int len;

        /* Find out the amount of space required to store the answer. */
        len = 0;
        if (mp != NULL) len += strlen(mp) + 1;
        if (up != NULL) len += strlen(up) + 1;
        if (dp != NULL) len += strlen(dp) + 1;

#if NGR_R_PRIVATE == 1
        if (*buf != NULL)
                free(*buf);
        *buf = malloc(len);
        if (*buf == NULL)
                return(NGR_R_BAD);
        cp = *buf;
#elif NGR_R_PRIVATE == 2
        if (p->buf)
                free(p->buf);
        p->buf = malloc(len);
        if (p->buf == NULL)
                return(NGR_R_BAD);
        cp = p->buf;
#else
        if (len > (int)buflen) {
                errno = ERANGE;
                return (NGR_R_BAD);
        }
        cp = buf;
#endif

        if (mp != NULL) {
                n = strlen(mp) + 1;
                strcpy(cp, mp);
                *machinep = cp;
                cp += n;
        } else
                *machinep = NULL;

        if (up != NULL) {
                n = strlen(up) + 1;
                strcpy(cp, up);
                *userp = cp;
                cp += n;
        } else
                *userp = NULL;

        if (dp != NULL) {
                n = strlen(dp) + 1;
                strcpy(cp, dp);
                *domainp = cp;
                cp += n;
        } else
                *domainp = NULL;

        return (NGR_R_OK);
}
#else /* NGR_R_RETURN */
        static int getnetgrent_r_unknown_system = 0;
#endif /* NGR_R_RETURN */
#endif /* !defined(_REENTRANT) || !defined(DO_PTHREADS) */
/*! \file */