/* Licensed to the Apache Software Foundation (ASF) under one or more

 * contributor license agreements.  See the NOTICE file distributed with

 * this work for additional information regarding copyright ownership.

 * The ASF licenses this file to You under the Apache License, Version 2.0

 * (the "License"); you may not use this file except in compliance with

 * the License.  You may obtain a copy of the License at

 *

 *     http://www.apache.org/licenses/LICENSE-2.0

 *

 * Unless required by applicable law or agreed to in writing, software

 * distributed under the License is distributed on an "AS IS" BASIS,

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

 * See the License for the specific language governing permissions and

 * limitations under the License.

 */

#include "apr_strings.h"

#include "apr_portable.h"

#include "apr_user.h"

#include "apr_private.h"

#ifdef HAVE_GRP_H

#include <grp.h>

#endif

#if APR_HAVE_SYS_TYPES_H

#include <sys/types.h>

#endif

#if APR_HAVE_UNISTD_H

#include <unistd.h> /* for _POSIX_THREAD_SAFE_FUNCTIONS */

#endif

#define GRBUF_SIZE 8192

APR_DECLARE(apr_status_t) apr_gid_name_get(char **groupname, apr_gid_t groupid,

                                           apr_pool_t *p)

{

    struct group *gr;

#if APR_HAS_THREADS && defined(_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETGRGID_R)

    struct group grp;

    char grbuf[GRBUF_SIZE];

    apr_status_t rv;

    /* See comment in getpwnam_safe on error handling. */

    rv = getgrgid_r(groupid, &grp, grbuf, sizeof(grbuf), &gr);

    if (rv) {

        return rv;

    }

    if (gr == NULL) {

        return APR_ENOENT;

    }

#else

    errno = 0;

    if ((gr = getgrgid(groupid)) == NULL) {

        return errno ? errno : APR_ENOENT;

    }

#endif

    *groupname = apr_pstrdup(p, gr->gr_name);

    return APR_SUCCESS;

}

APR_DECLARE(apr_status_t) apr_gid_get(apr_gid_t *groupid,

                                      const char *groupname, apr_pool_t *p)

{

    struct group *gr;

#if APR_HAS_THREADS && defined(_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETGRNAM_R)

    struct group grp;

    char grbuf[GRBUF_SIZE];

    apr_status_t rv;

    /* See comment in getpwnam_safe on error handling. */

    rv = getgrnam_r(groupname, &grp, grbuf, sizeof(grbuf), &gr);

    if (rv) {

        return rv;

    }

    if (gr == NULL) {

        return APR_ENOENT;

    }

#else

    errno = 0;

    if ((gr = getgrnam(groupname)) == NULL) {

        return errno ? errno : APR_ENOENT;

    }

#endif

    *groupid = gr->gr_gid;

    return APR_SUCCESS;

}