| /* 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 "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_CONTEXT); |
| |
| if (err != NULL) { |
| return err; |
| } |
| |
| if (!ap_unixd_config.suexec_enabled) { |
| return apr_pstrcat(cmd->pool, "SuexecUserGroup configured, but " |
| "suEXEC is disabled: ", |
| ap_unixd_config.suexec_disabled_reason, NULL); |
| } |
| |
| cfg->ugid.uid = ap_uname2id(uid); |
| cfg->ugid.gid = ap_gname2id(gid); |
| cfg->ugid.userdir = 0; |
| cfg->active = 1; |
| |
| 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) && ap_unixd_config.suexec_enabled) { |
| ap_log_error(APLOG_MARK, APLOG_NOTICE, 0, s, APLOGNO(01232) |
| "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); |
| } |
| |
| AP_DECLARE_MODULE(suexec) = |
| { |
| 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 */ |
| }; |