groupinfo.c revision 251886 
1/* Licensed to the Apache Software Foundation (ASF) under one or more
2 * contributor license agreements.  See the NOTICE file distributed with
3 * this work for additional information regarding copyright ownership.
4 * The ASF licenses this file to You under the Apache License, Version 2.0
5 * (the "License"); you may not use this file except in compliance with
6 * the License.  You may obtain a copy of the License at
7 *
8 *     http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#include "apr_strings.h"
18#include "apr_portable.h"
19#include "apr_user.h"
20#include "apr_private.h"
21#ifdef HAVE_GRP_H
22#include <grp.h>
23#endif
24#if APR_HAVE_SYS_TYPES_H
25#include <sys/types.h>
26#endif
27#if APR_HAVE_UNISTD_H
28#include <unistd.h> /* for _POSIX_THREAD_SAFE_FUNCTIONS */
29#endif
30
31#define GRBUF_SIZE 8192
32
33APR_DECLARE(apr_status_t) apr_gid_name_get(char **groupname, apr_gid_t groupid,
34                                           apr_pool_t *p)
35{
36    struct group *gr;
37
38#if APR_HAS_THREADS && defined(_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETGRGID_R)
39    struct group grp;
40    char grbuf[GRBUF_SIZE];
41    apr_status_t rv;
42
43    /* See comment in getpwnam_safe on error handling. */
44    rv = getgrgid_r(groupid, &grp, grbuf, sizeof(grbuf), &gr);
45    if (rv) {
46        return rv;
47    }
48    if (gr == NULL) {
49        return APR_ENOENT;
50    }
51#else
52    errno = 0;
53    if ((gr = getgrgid(groupid)) == NULL) {
54        return errno ? errno : APR_ENOENT;
55    }
56#endif
57    *groupname = apr_pstrdup(p, gr->gr_name);
58    return APR_SUCCESS;
59}
60
61APR_DECLARE(apr_status_t) apr_gid_get(apr_gid_t *groupid,
62                                      const char *groupname, apr_pool_t *p)
63{
64    struct group *gr;
65
66#if APR_HAS_THREADS && defined(_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETGRNAM_R)
67    struct group grp;
68    char grbuf[GRBUF_SIZE];
69    apr_status_t rv;
70
71    /* See comment in getpwnam_safe on error handling. */
72    rv = getgrnam_r(groupname, &grp, grbuf, sizeof(grbuf), &gr);
73    if (rv) {
74        return rv;
75    }
76    if (gr == NULL) {
77        return APR_ENOENT;
78    }
79#else
80    errno = 0;
81    if ((gr = getgrnam(groupname)) == NULL) {
82        return errno ? errno : APR_ENOENT;
83    }
84#endif
85    *groupid = gr->gr_gid;
86    return APR_SUCCESS;
87}
88