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_PWD_H
22 #include <pwd.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 #define APR_WANT_MEMFUNC
31 #include "apr_want.h"
32
33 #define PWBUF_SIZE 2048
34
getpwnam_safe(const char * username,struct passwd * pw,char pwbuf[PWBUF_SIZE])35 static apr_status_t getpwnam_safe(const char *username,
36 struct passwd *pw,
37 char pwbuf[PWBUF_SIZE])
38 {
39 struct passwd *pwptr;
40 #if APR_HAS_THREADS && defined(_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETPWNAM_R)
41 apr_status_t rv;
42
43 /* POSIX defines getpwnam_r() et al to return the error number
44 * rather than set errno, and requires pwptr to be set to NULL if
45 * the entry is not found, imply that "not found" is not an error
46 * condition; some implementations do return 0 with pwptr set to
47 * NULL. */
48 rv = getpwnam_r(username, pw, pwbuf, PWBUF_SIZE, &pwptr);
49 if (rv) {
50 return rv;
51 }
52 if (pwptr == NULL) {
53 return APR_ENOENT;
54 }
55 #else
56 /* Some platforms (e.g. FreeBSD 4.x) do not set errno on NULL "not
57 * found" return values for the non-threadsafe function either. */
58 errno = 0;
59 if ((pwptr = getpwnam(username)) != NULL) {
60 memcpy(pw, pwptr, sizeof *pw);
61 }
62 else {
63 return errno ? errno : APR_ENOENT;
64 }
65 #endif
66 return APR_SUCCESS;
67 }
68
apr_uid_homepath_get(char ** dirname,const char * username,apr_pool_t * p)69 APR_DECLARE(apr_status_t) apr_uid_homepath_get(char **dirname,
70 const char *username,
71 apr_pool_t *p)
72 {
73 struct passwd pw;
74 char pwbuf[PWBUF_SIZE];
75 apr_status_t rv;
76
77 if ((rv = getpwnam_safe(username, &pw, pwbuf)) != APR_SUCCESS)
78 return rv;
79
80 #ifdef OS2
81 /* Need to manually add user name for OS/2 */
82 *dirname = apr_pstrcat(p, pw.pw_dir, pw.pw_name, NULL);
83 #else
84 *dirname = apr_pstrdup(p, pw.pw_dir);
85 #endif
86 return APR_SUCCESS;
87 }
88
89
90
apr_uid_current(apr_uid_t * uid,apr_gid_t * gid,apr_pool_t * p)91 APR_DECLARE(apr_status_t) apr_uid_current(apr_uid_t *uid,
92 apr_gid_t *gid,
93 apr_pool_t *p)
94 {
95 *uid = getuid();
96 *gid = getgid();
97
98 return APR_SUCCESS;
99 }
100
101
102
103
apr_uid_get(apr_uid_t * uid,apr_gid_t * gid,const char * username,apr_pool_t * p)104 APR_DECLARE(apr_status_t) apr_uid_get(apr_uid_t *uid, apr_gid_t *gid,
105 const char *username, apr_pool_t *p)
106 {
107 struct passwd pw;
108 char pwbuf[PWBUF_SIZE];
109 apr_status_t rv;
110
111 if ((rv = getpwnam_safe(username, &pw, pwbuf)) != APR_SUCCESS)
112 return rv;
113
114 *uid = pw.pw_uid;
115 *gid = pw.pw_gid;
116
117 return APR_SUCCESS;
118 }
119
apr_uid_name_get(char ** username,apr_uid_t userid,apr_pool_t * p)120 APR_DECLARE(apr_status_t) apr_uid_name_get(char **username, apr_uid_t userid,
121 apr_pool_t *p)
122 {
123 struct passwd *pw;
124 #if APR_HAS_THREADS && defined(_POSIX_THREAD_SAFE_FUNCTIONS) && defined(HAVE_GETPWUID_R)
125 struct passwd pwd;
126 char pwbuf[PWBUF_SIZE];
127 apr_status_t rv;
128
129 rv = getpwuid_r(userid, &pwd, pwbuf, sizeof(pwbuf), &pw);
130 if (rv) {
131 return rv;
132 }
133
134 if (pw == NULL) {
135 return APR_ENOENT;
136 }
137
138 #else
139 errno = 0;
140 if ((pw = getpwuid(userid)) == NULL) {
141 return errno ? errno : APR_ENOENT;
142 }
143 #endif
144 *username = apr_pstrdup(p, pw->pw_name);
145 return APR_SUCCESS;
146 }
147