1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
|
/* 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.
*/
#define CORE_PRIVATE
#include "httpd.h"
#include "http_config.h"
#include "http_core.h"
#include "http_log.h"
#include "http_request.h"
#include "apr_strings.h"
#include "unixd.h"
#include "mpm_common.h"
#include "mod_suexec.h"
module AP_MODULE_DECLARE_DATA suexec_module;
/*
* Create a configuration specific to this module for a server or directory
* location, and fill it with the default settings.
*/
static void *mkconfig(apr_pool_t *p)
{
suexec_config_t *cfg = apr_palloc(p, sizeof(suexec_config_t));
cfg->active = 0;
return cfg;
}
/*
* Respond to a callback to create configuration record for a server or
* vhost environment.
*/
static void *create_mconfig_for_server(apr_pool_t *p, server_rec *s)
{
return mkconfig(p);
}
/*
* Respond to a callback to create a config record for a specific directory.
*/
static void *create_mconfig_for_directory(apr_pool_t *p, char *dir)
{
return mkconfig(p);
}
static const char *set_suexec_ugid(cmd_parms *cmd, void *mconfig,
const char *uid, const char *gid)
{
suexec_config_t *cfg = (suexec_config_t *) mconfig;
const char *err = ap_check_cmd_context(cmd, NOT_IN_DIR_LOC_FILE|NOT_IN_LIMIT);
if (err != NULL) {
return err;
}
if (unixd_config.suexec_enabled) {
cfg->ugid.uid = ap_uname2id(uid);
cfg->ugid.gid = ap_gname2id(gid);
cfg->ugid.userdir = 0;
cfg->active = 1;
}
else {
fprintf(stderr,
"Warning: SuexecUserGroup directive requires SUEXEC wrapper.\n");
}
return NULL;
}
static ap_unix_identity_t *get_suexec_id_doer(const request_rec *r)
{
suexec_config_t *cfg =
(suexec_config_t *) ap_get_module_config(r->per_dir_config, &suexec_module);
return cfg->active ? &cfg->ugid : NULL;
}
#define SUEXEC_POST_CONFIG_USERDATA "suexec_post_config_userdata"
static int suexec_post_config(apr_pool_t *p, apr_pool_t *plog,
apr_pool_t *ptemp, server_rec *s)
{
void *reported;
apr_pool_userdata_get(&reported, SUEXEC_POST_CONFIG_USERDATA,
s->process->pool);
if ((reported == NULL) && unixd_config.suexec_enabled) {
ap_log_error(APLOG_MARK, APLOG_NOTICE, 0, s,
"suEXEC mechanism enabled (wrapper: %s)", SUEXEC_BIN);
apr_pool_userdata_set((void *)1, SUEXEC_POST_CONFIG_USERDATA,
apr_pool_cleanup_null, s->process->pool);
}
return OK;
}
#undef SUEXEC_POST_CONFIG_USERDATA
/*
* Define the directives specific to this module. This structure is referenced
* later by the 'module' structure.
*/
static const command_rec suexec_cmds[] =
{
/* XXX - Another important reason not to allow this in .htaccess is that
* the ap_[ug]name2id() is not thread-safe */
AP_INIT_TAKE2("SuexecUserGroup", set_suexec_ugid, NULL, RSRC_CONF,
"User and group for spawned processes"),
{ NULL }
};
static void suexec_hooks(apr_pool_t *p)
{
ap_hook_get_suexec_identity(get_suexec_id_doer,NULL,NULL,APR_HOOK_MIDDLE);
ap_hook_post_config(suexec_post_config,NULL,NULL,APR_HOOK_MIDDLE);
}
module AP_MODULE_DECLARE_DATA suexec_module =
{
STANDARD20_MODULE_STUFF,
create_mconfig_for_directory, /* create per-dir config */
NULL, /* merge per-dir config */
create_mconfig_for_server, /* server config */
NULL, /* merge server config */
suexec_cmds, /* command table */
suexec_hooks /* register hooks */
};
|
