| /* ==================================================================== |
| * The Apache Software License, Version 1.1 |
| * |
| * Copyright (c) 2000-2003 The Apache Software Foundation. All rights |
| * reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in |
| * the documentation and/or other materials provided with the |
| * distribution. |
| * |
| * 3. The end-user documentation included with the redistribution, |
| * if any, must include the following acknowledgment: |
| * "This product includes software developed by the |
| * Apache Software Foundation (http://www.apache.org/)." |
| * Alternately, this acknowledgment may appear in the software itself, |
| * if and wherever such third-party acknowledgments normally appear. |
| * |
| * 4. The names "Apache" and "Apache Software Foundation" must |
| * not be used to endorse or promote products derived from this |
| * software without prior written permission. For written |
| * permission, please contact apache@apache.org. |
| * |
| * 5. Products derived from this software may not be called "Apache", |
| * nor may "Apache" appear in their name, without prior written |
| * permission of the Apache Software Foundation. |
| * |
| * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED |
| * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR |
| * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF |
| * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
| * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
| * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT |
| * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| * SUCH DAMAGE. |
| * ==================================================================== |
| * |
| * This software consists of voluntary contributions made by many |
| * individuals on behalf of the Apache Software Foundation. For more |
| * information on the Apache Software Foundation, please see |
| * <http://www.apache.org/>. |
| * |
| * Portions of this software are based upon public domain software |
| * originally written at the National Center for Supercomputing Applications, |
| * University of Illinois, Urbana-Champaign. |
| */ |
| |
| #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 */ |
| }; |