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- /* ====================================================================
- * Copyright (c) 1995-1999 The Apache Group. 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. All advertising materials mentioning features or use of this
- * software must display the following acknowledgment:
- * "This product includes software developed by the Apache Group
- * for use in the Apache HTTP server project (http://www.apache.org/)."
- *
- * 4. The names "Apache Server" and "Apache Group" 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 names without prior written
- * permission of the Apache Group.
- *
- * 6. Redistributions of any form whatsoever must retain the following
- * acknowledgment:
- * "This product includes software developed by the Apache Group
- * for use in the Apache HTTP server project (http://www.apache.org/)."
- *
- * THIS SOFTWARE IS PROVIDED BY THE APACHE GROUP ``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 GROUP OR
- * IT'S 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 Group and was originally based
- * on public domain software written at the National Center for
- * Supercomputing Applications, University of Illinois, Urbana-Champaign.
- * For more information on the Apache Group and the Apache HTTP server
- * project, please see <http://www.apache.org/>.
- *
- */
-
- /*
- * mod_env.c
- * version 0.0.5
- * status beta
- * Pass environment variables to CGI/SSI scripts.
- *
- * Andrew Wilson <Andrew.Wilson@cm.cf.ac.uk> 06.Dec.95
- *
- * Change log:
- * 08.Dec.95 Now allows PassEnv directive to appear more than once in
- * conf files.
- * 10.Dec.95 optimisation. getenv() only called at startup and used
- * to build a fast-to-access table. table used to build
- * per-server environment for each request.
- * robustness. better able to handle errors in configuration
- * files:
- * 1) PassEnv directive present, but no environment variable listed
- * 2) PassEnv FOO present, but $FOO not present in environment
- * 3) no PassEnv directive present
- * 23.Dec.95 Now allows SetEnv directive with same semantics as 'sh' setenv:
- * SetEnv Var sets Var to the empty string
- * SetEnv Var Val sets Var to the value Val
- * Values containing whitespace should be quoted, eg:
- * SetEnv Var "this is some text"
- * Environment variables take their value from the last instance
- * of PassEnv / SetEnv to be reached in the configuration file.
- * For example, the sequence:
- * PassEnv FOO
- * SetEnv FOO override
- * Causes FOO to take the value 'override'.
- * 23.Feb.96 Added UnsetEnv directive to allow environment variables
- * to be removed.
- * Virtual hosts now 'inherit' parent server environment which
- * they're able to overwrite with their own directives or
- * selectively ignore with UnsetEnv.
- * *** IMPORTANT - the way that virtual hosts inherit their ***
- * *** environment variables from the default server's ***
- * *** configuration has changed. You should test your ***
- * *** configuration carefully before accepting this ***
- * *** version of the module in a live webserver which used ***
- * *** older versions of the module. ***
- */
-
- #include "httpd.h"
- #include "http_config.h"
-
- typedef struct {
- table *vars;
- char *unsetenv;
- int vars_present;
- } env_server_config_rec;
-
- module MODULE_VAR_EXPORT env_module;
-
- static void *create_env_server_config(pool *p, server_rec *dummy)
- {
- env_server_config_rec *new =
- (env_server_config_rec *) ap_palloc(p, sizeof(env_server_config_rec));
- new->vars = ap_make_table(p, 50);
- new->unsetenv = "";
- new->vars_present = 0;
- return (void *) new;
- }
-
- static void *merge_env_server_configs(pool *p, void *basev, void *addv)
- {
- env_server_config_rec *base = (env_server_config_rec *) basev;
- env_server_config_rec *add = (env_server_config_rec *) addv;
- env_server_config_rec *new =
- (env_server_config_rec *) ap_palloc(p, sizeof(env_server_config_rec));
-
- table *new_table;
- table_entry *elts;
- array_header *arr;
-
- int i;
- const char *uenv, *unset;
-
- /*
- * new_table = copy_table( p, base->vars );
- * foreach $element ( @add->vars ) {
- * table_set( new_table, $element.key, $element.val );
- * };
- * foreach $unsetenv ( @UNSETENV ) {
- * table_unset( new_table, $unsetenv );
- * }
- */
-
- new_table = ap_copy_table(p, base->vars);
-
- arr = ap_table_elts(add->vars);
- elts = (table_entry *)arr->elts;
-
- for (i = 0; i < arr->nelts; ++i) {
- ap_table_setn(new_table, elts[i].key, elts[i].val);
- }
-
- unset = add->unsetenv;
- uenv = ap_getword_conf(p, &unset);
- while (uenv[0] != '\0') {
- ap_table_unset(new_table, uenv);
- uenv = ap_getword_conf(p, &unset);
- }
-
- new->vars = new_table;
-
- new->vars_present = base->vars_present || add->vars_present;
-
- return new;
- }
-
- static const char *add_env_module_vars_passed(cmd_parms *cmd, char *struct_ptr,
- const char *arg)
- {
- env_server_config_rec *sconf =
- ap_get_module_config(cmd->server->module_config, &env_module);
- table *vars = sconf->vars;
- char *env_var;
- char *name_ptr;
-
- while (*arg) {
- name_ptr = ap_getword_conf(cmd->pool, &arg);
- env_var = getenv(name_ptr);
- if (env_var != NULL) {
- sconf->vars_present = 1;
- ap_table_setn(vars, name_ptr, ap_pstrdup(cmd->pool, env_var));
- }
- }
- return NULL;
- }
-
- static const char *add_env_module_vars_set(cmd_parms *cmd, char *struct_ptr,
- const char *arg)
- {
- env_server_config_rec *sconf =
- ap_get_module_config(cmd->server->module_config, &env_module);
- table *vars = sconf->vars;
- char *name, *value;
-
- name = ap_getword_conf(cmd->pool, &arg);
- value = ap_getword_conf(cmd->pool, &arg);
-
- /* name is mandatory, value is optional. no value means
- * set the variable to an empty string
- */
-
-
- if ((*name == '\0') || (*arg != '\0')) {
- return "SetEnv takes one or two arguments. An environment variable name and an optional value to pass to CGI.";
- }
-
- sconf->vars_present = 1;
- ap_table_setn(vars, name, value);
-
- return NULL;
- }
-
- static const char *add_env_module_vars_unset(cmd_parms *cmd, char *struct_ptr,
- char *arg)
- {
- env_server_config_rec *sconf =
- ap_get_module_config(cmd->server->module_config, &env_module);
- sconf->unsetenv = sconf->unsetenv ?
- ap_pstrcat(cmd->pool, sconf->unsetenv, " ", arg, NULL) :
- arg;
- return NULL;
- }
-
- static const command_rec env_module_cmds[] =
- {
- {"PassEnv", add_env_module_vars_passed, NULL,
- RSRC_CONF, RAW_ARGS, "a list of environment variables to pass to CGI."},
- {"SetEnv", add_env_module_vars_set, NULL,
- RSRC_CONF, RAW_ARGS, "an environment variable name and a value to pass to CGI."},
- {"UnsetEnv", add_env_module_vars_unset, NULL,
- RSRC_CONF, RAW_ARGS, "a list of variables to remove from the CGI environment."},
- {NULL},
- };
-
- static int fixup_env_module(request_rec *r)
- {
- table *e = r->subprocess_env;
- server_rec *s = r->server;
- env_server_config_rec *sconf = ap_get_module_config(s->module_config,
- &env_module);
- table *vars = sconf->vars;
-
- if (!sconf->vars_present)
- return DECLINED;
-
- r->subprocess_env = ap_overlay_tables(r->pool, e, vars);
-
- return OK;
- }
-
- module MODULE_VAR_EXPORT env_module =
- {
- STANDARD_MODULE_STUFF,
- NULL, /* initializer */
- NULL, /* dir config creater */
- NULL, /* dir merger --- default is to override */
- create_env_server_config, /* server config */
- merge_env_server_configs, /* merge server configs */
- env_module_cmds, /* command table */
- NULL, /* handlers */
- NULL, /* filename translation */
- NULL, /* check_user_id */
- NULL, /* check auth */
- NULL, /* check access */
- NULL, /* type_checker */
- fixup_env_module, /* fixups */
- NULL, /* logger */
- NULL, /* header parser */
- NULL, /* child_init */
- NULL, /* child_exit */
- NULL /* post read-request */
- };
-