1 files changed, 139 insertions, 0 deletions
diff --git a/modules/generators/mod_suexec.c b/modules/generators/mod_suexec.c
new file mode 100644
index 0000000..a71b0a8
--- /dev/null
+++ b/modules/generators/mod_suexec.c
@@ -0,0 +1,139 @@
+/* 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 */
+};