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step -must- be done with a pool that will not outlive the cmd pool, from which they may have been dynamically loaded. git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@87697 13f79535-47bb-0310-9956-ffa450edef68
272 lines
9.5 KiB
C
272 lines
9.5 KiB
C
/* ====================================================================
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* The Apache Software License, Version 1.1
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*
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* Copyright (c) 2000 The Apache Software Foundation. All rights
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* reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* 3. The end-user documentation included with the redistribution,
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* if any, must include the following acknowledgment:
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* "This product includes software developed by the
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* Apache Software Foundation (http://www.apache.org/)."
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* Alternately, this acknowledgment may appear in the software itself,
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* if and wherever such third-party acknowledgments normally appear.
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*
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* 4. The names "Apache" and "Apache Software Foundation" must
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* not be used to endorse or promote products derived from this
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* software without prior written permission. For written
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* permission, please contact apache@apache.org.
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*
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* 5. Products derived from this software may not be called "Apache",
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* nor may "Apache" appear in their name, without prior written
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* permission of the Apache Software Foundation.
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*
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
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* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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* ====================================================================
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*
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* This software consists of voluntary contributions made by many
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* individuals on behalf of the Apache Software Foundation. For more
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* information on the Apache Software Foundation, please see
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* <http://www.apache.org/>.
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*
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* Portions of this software are based upon public domain software
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* originally written at the National Center for Supercomputing Applications,
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* University of Illinois, Urbana-Champaign.
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*/
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/*
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* mod_env.c
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* version 0.0.5
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* status beta
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* Pass environment variables to CGI/SSI scripts.
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*
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* Andrew Wilson <Andrew.Wilson@cm.cf.ac.uk> 06.Dec.95
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*
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* Change log:
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* 08.Dec.95 Now allows PassEnv directive to appear more than once in
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* conf files.
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* 10.Dec.95 optimisation. getenv() only called at startup and used
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* to build a fast-to-access table. apr_table_t used to build
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* per-server environment for each request.
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* robustness. better able to handle errors in configuration
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* files:
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* 1) PassEnv directive present, but no environment variable listed
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* 2) PassEnv FOO present, but $FOO not present in environment
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* 3) no PassEnv directive present
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* 23.Dec.95 Now allows SetEnv directive with same semantics as 'sh' setenv:
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* SetEnv Var sets Var to the empty string
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* SetEnv Var Val sets Var to the value Val
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* Values containing whitespace should be quoted, eg:
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* SetEnv Var "this is some text"
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* Environment variables take their value from the last instance
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* of PassEnv / SetEnv to be reached in the configuration file.
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* For example, the sequence:
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* PassEnv FOO
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* SetEnv FOO override
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* Causes FOO to take the value 'override'.
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* 23.Feb.96 Added UnsetEnv directive to allow environment variables
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* to be removed.
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* Virtual hosts now 'inherit' parent server environment which
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* they're able to overwrite with their own directives or
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* selectively ignore with UnsetEnv.
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* *** IMPORTANT - the way that virtual hosts inherit their ***
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* *** environment variables from the default server's ***
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* *** configuration has changed. You should test your ***
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* *** configuration carefully before accepting this ***
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* *** version of the module in a live webserver which used ***
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* *** older versions of the module. ***
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*/
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#include "apr_strings.h"
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#include "ap_config.h"
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#include "httpd.h"
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#include "http_config.h"
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#include "http_request.h"
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#ifdef HAVE_STDLIB_H
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#include <stdlib.h>
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#endif
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typedef struct {
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apr_table_t *vars;
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const char *unsetenv;
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int vars_present;
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} env_dir_config_rec;
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module AP_MODULE_DECLARE_DATA env_module;
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static void *create_env_dir_config(apr_pool_t *p, char *dummy)
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{
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env_dir_config_rec *new =
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(env_dir_config_rec *) apr_palloc(p, sizeof(env_dir_config_rec));
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new->vars = apr_make_table(p, 50);
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new->unsetenv = "";
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new->vars_present = 0;
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return (void *) new;
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}
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static void *merge_env_dir_configs(apr_pool_t *p, void *basev, void *addv)
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{
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env_dir_config_rec *base = (env_dir_config_rec *) basev;
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env_dir_config_rec *add = (env_dir_config_rec *) addv;
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env_dir_config_rec *new =
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(env_dir_config_rec *) apr_palloc(p, sizeof(env_dir_config_rec));
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apr_table_t *new_table;
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apr_table_entry_t *elts;
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apr_array_header_t *arr;
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int i;
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const char *uenv, *unset;
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/*
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* new_table = copy_table( p, base->vars );
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* foreach $element ( @add->vars ) {
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* table_set( new_table, $element.key, $element.val );
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* };
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* foreach $unsetenv ( @UNSETENV ) {
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* table_unset( new_table, $unsetenv );
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* }
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*/
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new_table = apr_copy_table(p, base->vars);
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arr = apr_table_elts(add->vars);
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elts = (apr_table_entry_t *)arr->elts;
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for (i = 0; i < arr->nelts; ++i) {
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apr_table_setn(new_table, elts[i].key, elts[i].val);
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}
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unset = add->unsetenv;
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uenv = ap_getword_conf(p, &unset);
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while (uenv[0] != '\0') {
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apr_table_unset(new_table, uenv);
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uenv = ap_getword_conf(p, &unset);
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}
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new->vars = new_table;
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new->vars_present = base->vars_present || add->vars_present;
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return new;
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}
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static const char *add_env_module_vars_passed(cmd_parms *cmd, void *sconf_,
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const char *arg)
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{
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env_dir_config_rec *sconf=sconf_;
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apr_table_t *vars = sconf->vars;
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char *env_var;
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char *name_ptr;
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while (*arg) {
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name_ptr = ap_getword_conf(cmd->pool, &arg);
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env_var = getenv(name_ptr);
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if (env_var != NULL) {
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sconf->vars_present = 1;
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apr_table_setn(vars, name_ptr, apr_pstrdup(cmd->pool, env_var));
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}
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}
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return NULL;
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}
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static const char *add_env_module_vars_set(cmd_parms *cmd, void *sconf_,
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const char *arg)
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{
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env_dir_config_rec *sconf=sconf_;
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apr_table_t *vars = sconf->vars;
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char *name, *value;
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name = ap_getword_conf(cmd->pool, &arg);
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value = ap_getword_conf(cmd->pool, &arg);
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/* name is mandatory, value is optional. no value means
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* set the variable to an empty string
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*/
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if ((*name == '\0') || (*arg != '\0')) {
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return "SetEnv takes one or two arguments. An environment variable name and an optional value to pass to CGI.";
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}
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sconf->vars_present = 1;
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apr_table_setn(vars, name, value);
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return NULL;
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}
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static const char *add_env_module_vars_unset(cmd_parms *cmd, void *sconf_,
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const char *arg)
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{
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env_dir_config_rec *sconf=sconf_;
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sconf->unsetenv = sconf->unsetenv ?
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apr_pstrcat(cmd->pool, sconf->unsetenv, " ", arg, NULL) :
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arg;
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return NULL;
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}
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static const command_rec env_module_cmds[] =
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{
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AP_INIT_RAW_ARGS("PassEnv", add_env_module_vars_passed, NULL,
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OR_FILEINFO, "a list of environment variables to pass to CGI."),
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AP_INIT_RAW_ARGS("SetEnv", add_env_module_vars_set, NULL,
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OR_FILEINFO, "an environment variable name and a value to pass to CGI."),
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AP_INIT_RAW_ARGS("UnsetEnv", add_env_module_vars_unset, NULL,
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OR_FILEINFO, "a list of variables to remove from the CGI environment."),
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{NULL},
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};
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static int fixup_env_module(request_rec *r)
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{
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apr_table_t *e = r->subprocess_env;
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env_dir_config_rec *sconf = ap_get_module_config(r->per_dir_config,
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&env_module);
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apr_table_t *vars = sconf->vars;
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if (!sconf->vars_present)
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return DECLINED;
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r->subprocess_env = apr_overlay_tables(r->pool, e, vars);
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return OK;
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}
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static void register_hooks(apr_pool_t *p)
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{
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ap_hook_fixups(fixup_env_module,NULL,NULL,AP_HOOK_MIDDLE);
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}
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module AP_MODULE_DECLARE_DATA env_module =
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{
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STANDARD20_MODULE_STUFF,
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create_env_dir_config, /* dir config creater */
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merge_env_dir_configs, /* dir merger --- default is to override */
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NULL, /* server config */
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NULL, /* merge server configs */
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env_module_cmds, /* command apr_table_t */
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register_hooks /* register hooks */
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};
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