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 "httpd.h"
18#include "http_config.h"
19#include "apr_strings.h"
20#include "ap_provider.h"
21
22#include "mod_dav.h"
23#include "locks.h"
24
25/* per-dir configuration */
26typedef struct {
27    const char *lockdb_path;
28} dav_lock_dir_conf;
29
30extern const dav_hooks_locks dav_hooks_locks_generic;
31
32extern module AP_MODULE_DECLARE_DATA dav_lock_module;
33
34const char *dav_generic_get_lockdb_path(const request_rec *r)
35{
36    dav_lock_dir_conf *conf;
37
38    conf = ap_get_module_config(r->per_dir_config, &dav_lock_module);
39    return conf->lockdb_path;
40}
41
42static void *dav_lock_create_dir_config(apr_pool_t *p, char *dir)
43{
44    return apr_pcalloc(p, sizeof(dav_lock_dir_conf));
45}
46
47static void *dav_lock_merge_dir_config(apr_pool_t *p,
48                                       void *base, void *overrides)
49{
50    dav_lock_dir_conf *parent = base;
51    dav_lock_dir_conf *child = overrides;
52    dav_lock_dir_conf *newconf;
53
54    newconf = apr_pcalloc(p, sizeof(*newconf));
55
56    newconf->lockdb_path =
57        child->lockdb_path ? child->lockdb_path : parent->lockdb_path;
58
59    return newconf;
60}
61
62/*
63 * Command handler for the DAVGenericLockDB directive, which is TAKE1
64 */
65static const char *dav_lock_cmd_davlockdb(cmd_parms *cmd, void *config,
66                                        const char *arg1)
67{
68    dav_lock_dir_conf *conf = config;
69
70    conf->lockdb_path = ap_server_root_relative(cmd->pool, arg1);
71
72    if (!conf->lockdb_path) {
73        return apr_pstrcat(cmd->pool, "Invalid DAVGenericLockDB path ",
74                           arg1, NULL);
75    }
76
77    return NULL;
78}
79
80static const command_rec dav_lock_cmds[] =
81{
82    /* per server */
83    AP_INIT_TAKE1("DAVGenericLockDB", dav_lock_cmd_davlockdb, NULL, ACCESS_CONF,
84                  "specify a lock database"),
85
86    { NULL }
87};
88
89static void register_hooks(apr_pool_t *p)
90{
91    ap_register_provider(p, "dav-lock", "generic", "0",
92                         &dav_hooks_locks_generic);
93}
94
95module AP_MODULE_DECLARE_DATA dav_lock_module =
96{
97    STANDARD20_MODULE_STUFF,
98    dav_lock_create_dir_config,     /* dir config creater */
99    dav_lock_merge_dir_config,      /* dir merger --- default is to override */
100    NULL,                           /* server config */
101    NULL,                           /* merge server config */
102    dav_lock_cmds,                  /* command table */
103    register_hooks,                 /* register hooks */
104};
105