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b97ec4c63a6f54c5fde6bb94e04a38149bd6c515
apache/server/config.c
Greg Stein b97ec4c63a drop the "container" param from ap_walk_config(). callers should simply 
pass the first child, rather than expecting the walker to do it.
remove the nasty "static" variable inside ap_walk_config(). it now walks the
    tree provided with no worries about bumping up/down levels.
minor refactor between ap_walk_config() and ap_walk_config_sub() to clean up
    some logic and clarify the code.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@85025 13f79535-47bb-0310-9956-ffa450edef68
2000-04-24 12:27:02 +00:00

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/* ====================================================================
* The Apache Software License, Version 1.1
*
* Copyright (c) 2000 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.
*/
/*
* http_config.c: once was auxillary functions for reading httpd's config
* file and converting filenames into a namespace
*
* Rob McCool
*
* Wall-to-wall rewrite for Apache... commands which are part of the
* server core can now be found next door in "http_core.c". Now contains
* general command loop, and functions which do bookkeeping for the new
* Apache config stuff (modules and configuration vectors).
*
* rst
*
*/
#define CORE_PRIVATE
#include "ap_config.h"
#include "apr_portable.h"
#include "apr_file_io.h"
#include "httpd.h"
#include "http_config.h"
#include "http_core.h"
#include "http_log.h" /* for errors in parse_htaccess */
#include "http_request.h" /* for default_handler (see invoke_handler) */
#include "http_main.h"
#include "http_vhost.h"
#include "util_cfgtree.h"
HOOK_STRUCT(
HOOK_LINK(header_parser)
HOOK_LINK(post_config)
HOOK_LINK(open_logs)
HOOK_LINK(child_init)
)
IMPLEMENT_HOOK_RUN_ALL(int,header_parser,(request_rec *r),(r),OK,DECLINED)
IMPLEMENT_HOOK_VOID(post_config,
(ap_pool_t *pconf, ap_pool_t *plog, ap_pool_t *ptemp, server_rec *s),
(pconf,plog,ptemp,s))
IMPLEMENT_HOOK_VOID(open_logs,
(ap_pool_t *pconf, ap_pool_t *plog, ap_pool_t *ptemp, server_rec *s),
(pconf,plog,ptemp,s))
IMPLEMENT_HOOK_VOID(child_init,(ap_pool_t *pchild, server_rec *s),(pchild,s))
/****************************************************************
*
* We begin with the functions which deal with the linked list
* of modules which control just about all of the server operation.
*/
/* total_modules is the number of modules that have been linked
* into the server.
*/
static int total_modules = 0;
/* dynamic_modules is the number of modules that have been added
* after the pre-loaded ones have been set up. It shouldn't be larger
* than DYNAMIC_MODULE_LIMIT.
*/
static int dynamic_modules = 0;
API_VAR_EXPORT module *top_module = NULL;
API_VAR_EXPORT module **ap_loaded_modules=NULL;
typedef int (*handler_func) (request_rec *);
typedef void *(*dir_maker_func) (ap_pool_t *, char *);
typedef void *(*merger_func) (ap_pool_t *, void *, void *);
/* Dealing with config vectors. These are associated with per-directory,
* per-server, and per-request configuration, and have a void* pointer for
* each modules. The nature of the structure pointed to is private to the
* module in question... the core doesn't (and can't) know. However, there
* are defined interfaces which allow it to create instances of its private
* per-directory and per-server structures, and to merge the per-directory
* structures of a directory and its subdirectory (producing a new one in
* which the defaults applying to the base directory have been properly
* overridden).
*/
#ifndef ap_get_module_config
API_EXPORT(void *) ap_get_module_config(void *conf_vector, module *m)
{
void **confv = (void **) conf_vector;
return confv[m->module_index];
}
#endif
#ifndef ap_set_module_config
API_EXPORT(void) ap_set_module_config(void *conf_vector, module *m, void *val)
{
void **confv = (void **) conf_vector;
confv[m->module_index] = val;
}
#endif
static void *create_empty_config(ap_pool_t *p)
{
void **conf_vector = (void **) ap_pcalloc(p, sizeof(void *) *
(total_modules + DYNAMIC_MODULE_LIMIT));
return (void *) conf_vector;
}
static void *create_default_per_dir_config(ap_pool_t *p)
{
void **conf_vector = (void **) ap_pcalloc(p, sizeof(void *) * (total_modules + DYNAMIC_MODULE_LIMIT));
module *modp;
for (modp = top_module; modp; modp = modp->next) {
dir_maker_func df = modp->create_dir_config;
if (df)
conf_vector[modp->module_index] = (*df) (p, NULL);
}
return (void *) conf_vector;
}
void *
ap_merge_per_dir_configs(ap_pool_t *p, void *base, void *new)
{
void **conf_vector = (void **) ap_palloc(p, sizeof(void *) * total_modules);
void **base_vector = (void **) base;
void **new_vector = (void **) new;
module *modp;
for (modp = top_module; modp; modp = modp->next) {
merger_func df = modp->merge_dir_config;
int i = modp->module_index;
if (df && new_vector[i])
conf_vector[i] = (*df) (p, base_vector[i], new_vector[i]);
else
conf_vector[i] = new_vector[i] ? new_vector[i] : base_vector[i];
}
return (void *) conf_vector;
}
static void *create_server_config(ap_pool_t *p, server_rec *s)
{
void **conf_vector = (void **) ap_pcalloc(p, sizeof(void *) * (total_modules + DYNAMIC_MODULE_LIMIT));
module *modp;
for (modp = top_module; modp; modp = modp->next) {
if (modp->create_server_config)
conf_vector[modp->module_index] = (*modp->create_server_config) (p, s);
}
return (void *) conf_vector;
}
static void merge_server_configs(ap_pool_t *p, void *base, void *virt)
{
/* Can reuse the 'virt' vector for the spine of it, since we don't
* have to deal with the moral equivalent of .htaccess files here...
*/
void **base_vector = (void **) base;
void **virt_vector = (void **) virt;
module *modp;
for (modp = top_module; modp; modp = modp->next) {
merger_func df = modp->merge_server_config;
int i = modp->module_index;
if (!virt_vector[i])
virt_vector[i] = base_vector[i];
else if (df)
virt_vector[i] = (*df) (p, base_vector[i], virt_vector[i]);
}
}
void *ap_create_request_config(ap_pool_t *p)
{
return create_empty_config(p);
}
void *ap_create_conn_config(ap_pool_t *p)
{
return create_empty_config(p);
}
CORE_EXPORT(void *) ap_create_per_dir_config(ap_pool_t *p)
{
return create_empty_config(p);
}
/*
* For speed/efficiency we generate a compact list of all the handlers
* and wildcard handlers. This means we won't have to scan the entire
* module list looking for handlers... where we'll find a whole whack
* of NULLs.
*/
typedef struct {
handler_rec hr;
size_t len;
} fast_handler_rec;
static fast_handler_rec *handlers;
static fast_handler_rec *wildhandlers;
static void init_handlers(ap_pool_t *p)
{
module *modp;
int nhandlers = 0;
int nwildhandlers = 0;
const handler_rec *handp;
fast_handler_rec *ph, *pw;
char *starp;
for (modp = top_module; modp; modp = modp->next) {
if (!modp->handlers)
continue;
for (handp = modp->handlers; handp->content_type; ++handp) {
if (strchr(handp->content_type, '*')) {
nwildhandlers ++;
} else {
nhandlers ++;
}
}
}
ph = handlers = ap_palloc(p, sizeof(*ph)*(nhandlers + 1));
pw = wildhandlers = ap_palloc(p, sizeof(*pw)*(nwildhandlers + 1));
for (modp = top_module; modp; modp = modp->next) {
if (!modp->handlers)
continue;
for (handp = modp->handlers; handp->content_type; ++handp) {
if ((starp = strchr(handp->content_type, '*'))) {
pw->hr.content_type = handp->content_type;
pw->hr.handler = handp->handler;
pw->len = starp - handp->content_type;
pw ++;
} else {
ph->hr.content_type = handp->content_type;
ph->hr.handler = handp->handler;
ph->len = strlen(handp->content_type);
ph ++;
}
}
}
pw->hr.content_type = NULL;
pw->hr.handler = NULL;
ph->hr.content_type = NULL;
ph->hr.handler = NULL;
}
int ap_invoke_handler(request_rec *r)
{
fast_handler_rec *handp;
const char *handler;
char *p;
size_t handler_len;
int result = HTTP_INTERNAL_SERVER_ERROR;
if (r->handler) {
handler = r->handler;
handler_len = strlen(handler);
}
else {
handler = r->content_type ? r->content_type : ap_default_type(r);
if ((p = strchr(handler, ';')) != NULL) { /* MIME type arguments */
while (p > handler && p[-1] == ' ')
--p; /* strip trailing spaces */
handler_len = p - handler;
}
else {
handler_len = strlen(handler);
}
}
/* Pass one --- direct matches */
for (handp = handlers; handp->hr.content_type; ++handp) {
if (handler_len == handp->len
&& !strncmp(handler, handp->hr.content_type, handler_len)) {
result = (*handp->hr.handler) (r);
if (result != DECLINED)
return result;
}
}
/* Pass two --- wildcard matches */
for (handp = wildhandlers; handp->hr.content_type; ++handp) {
if (handler_len >= handp->len
&& !strncmp(handler, handp->hr.content_type, handp->len)) {
result = (*handp->hr.handler) (r);
if (result != DECLINED)
return result;
}
}
if (result == HTTP_INTERNAL_SERVER_ERROR && r->handler && r->filename) {
ap_log_rerror(APLOG_MARK, APLOG_NOERRNO|APLOG_WARNING, 0, r,
"handler \"%s\" not found for: %s", r->handler, r->filename);
}
return HTTP_INTERNAL_SERVER_ERROR;
}
int g_bDebugHooks;
const char *g_szCurrentHookName;
void ap_register_hooks(module *m)
{
if(m->register_hooks)
{
if(getenv("SHOW_HOOKS"))
{
printf("Registering hooks for %s\n",m->name);
g_bDebugHooks=1;
}
g_szCurrentHookName=m->name;
m->register_hooks();
}
}
/* One-time setup for precompiled modules --- NOT to be done on restart */
API_EXPORT(void) ap_add_module(module *m)
{
/* This could be called from an AddModule httpd.conf command,
* after the file has been linked and the module structure within it
* teased out...
*/
if (m->version != MODULE_MAGIC_NUMBER_MAJOR) {
ap_log_error(APLOG_MARK, APLOG_STARTUP | APLOG_NOERRNO, 0, NULL,
"%s: module \"%s\" is not compatible with this "
"version of Apache.", ap_server_argv0, m->name);
ap_log_error(APLOG_MARK, APLOG_STARTUP | APLOG_NOERRNO, 0, NULL, "Please contact the vendor for the correct version.");
exit(1);
}
if (m->next == NULL) {
m->next = top_module;
top_module = m;
}
if (m->module_index == -1) {
m->module_index = total_modules++;
dynamic_modules++;
if (dynamic_modules > DYNAMIC_MODULE_LIMIT) {
ap_log_error(APLOG_MARK, APLOG_STARTUP | APLOG_NOERRNO, 0, NULL,
"%s: module \"%s\" could not be loaded, because"
" the dynamic", ap_server_argv0, m->name);
ap_log_error(APLOG_MARK, APLOG_STARTUP | APLOG_NOERRNO, 0, NULL,
"module limit was reached. Please increase "
"DYNAMIC_MODULE_LIMIT and recompile.");
exit(1);
}
}
/* Some C compilers put a complete path into __FILE__, but we want
* only the filename (e.g. mod_includes.c). So check for path
* components (Unix and DOS), and remove them.
*/
if (strrchr(m->name, '/'))
m->name = 1 + strrchr(m->name, '/');
if (strrchr(m->name, '\\'))
m->name = 1 + strrchr(m->name, '\\');
#ifdef _OSD_POSIX /* __FILE__="*POSIX(/home/martin/apache/src/modules/standard/mod_info.c)" */
/* We cannot fix the string in-place, because it's const */
if (m->name[strlen(m->name)-1]==')') {
char *tmp = strdup(m->name); /* FIXME:memory leak, albeit a small one */
tmp[strlen(tmp)-1] = '\0';
m->name = tmp;
}
#endif /*_OSD_POSIX*/
/* FIXME: is this the right place to call this? */
ap_register_hooks(m);
}
/*
* remove_module undoes what add_module did. There are some caveats:
* when the module is removed, its slot is lost so all the current
* per-dir and per-server configurations are invalid. So we should
* only ever call this function when you are invalidating almost
* all our current data. I.e. when doing a restart.
*/
API_EXPORT(void) ap_remove_module(module *m)
{
module *modp;
modp = top_module;
if (modp == m) {
/* We are the top module, special case */
top_module = modp->next;
m->next = NULL;
}
else {
/* Not the top module, find use. When found modp will
* point to the module _before_ us in the list
*/
while (modp && modp->next != m) {
modp = modp->next;
}
if (!modp) {
/* Uh-oh, this module doesn't exist */
ap_log_error(APLOG_MARK, APLOG_ERR|APLOG_NOERRNO, 0, NULL,
"Cannot remove module %s: not found in module list",
m->name);
return;
}
/* Eliminate us from the module list */
modp->next = modp->next->next;
}
m->module_index = -1; /* simulate being unloaded, should
* be unnecessary */
dynamic_modules--;
total_modules--;
}
API_EXPORT(void) ap_add_loaded_module(module *mod)
{
module **m;
/*
* Add module pointer to top of chained module list
*/
ap_add_module(mod);
/*
* And module pointer to list of loaded modules
*
* Notes: 1. ap_add_module() would already complain if no more space
* exists for adding a dynamically loaded module
* 2. ap_add_module() accepts double inclusion, so we have
* to accept this, too.
*/
for (m = ap_loaded_modules; *m != NULL; m++)
;
*m++ = mod;
*m = NULL;
}
API_EXPORT(void) ap_remove_loaded_module(module *mod)
{
module **m;
module **m2;
int done;
/*
* Remove module pointer from chained module list
*/
ap_remove_module(mod);
/*
* Remove module pointer from list of loaded modules
*
* Note: 1. We cannot determine if the module was successfully
* removed by ap_remove_module().
* 2. We have not to complain explicity when the module
* is not found because ap_remove_module() did it
* for us already.
*/
for (m = m2 = ap_loaded_modules, done = 0; *m2 != NULL; m2++) {
if (*m2 == mod && done == 0)
done = 1;
else
*m++ = *m2;
}
*m = NULL;
}
void ap_setup_prelinked_modules(process_rec *process)
{
module **m;
module **m2;
/*
* Initialise total_modules variable and module indices
*/
total_modules = 0;
for (m = ap_preloaded_modules; *m != NULL; m++)
(*m)->module_index = total_modules++;
/*
* Initialise list of loaded modules
*/
ap_loaded_modules = (module **)ap_palloc(process->pool,
sizeof(module *)*(total_modules+DYNAMIC_MODULE_LIMIT+1));
if (ap_loaded_modules == NULL) {
ap_log_error(APLOG_MARK, APLOG_STARTUP | APLOG_NOERRNO, 0, NULL,
"Ouch! Out of memory in ap_setup_prelinked_modules()!");
}
for (m = ap_preloaded_modules, m2 = ap_loaded_modules; *m != NULL; )
*m2++ = *m++;
*m2 = NULL;
/*
* Initialize chain of linked (=activate) modules
*/
for (m = ap_prelinked_modules; *m != NULL; m++)
ap_add_module(*m);
ap_sort_hooks();
}
API_EXPORT(const char *) ap_find_module_name(module *m)
{
return m->name;
}
API_EXPORT(module *) ap_find_linked_module(const char *name)
{
module *modp;
for (modp = top_module; modp; modp = modp->next) {
if (strcmp(modp->name, name) == 0)
return modp;
}
return NULL;
}
/* Add a named module. Returns 1 if module found, 0 otherwise. */
API_EXPORT(int) ap_add_named_module(const char *name)
{
module *modp;
int i = 0;
for (modp = ap_loaded_modules[i]; modp; modp = ap_loaded_modules[++i]) {
if (strcmp(modp->name, name) == 0) {
/* Only add modules that are not already enabled. */
if (modp->next == NULL) {
ap_add_module(modp);
}
return 1;
}
}
return 0;
}
/* Clear the internal list of modules, in preparation for starting over. */
API_EXPORT(void) ap_clear_module_list()
{
module **m = &top_module;
module **next_m;
while (*m) {
next_m = &((*m)->next);
*m = NULL;
m = next_m;
}
/* This is required; so we add it always. */
ap_add_named_module("http_core.c");
}
/*****************************************************************
*
* Resource, access, and .htaccess config files now parsed by a common
* command loop.
*
* Let's begin with the basics; parsing the line and
* invoking the function...
*/
static const char *invoke_cmd(const command_rec *cmd, cmd_parms *parms,
void *mconfig, const char *args)
{
char *w, *w2, *w3;
const char *errmsg;
if ((parms->override & cmd->req_override) == 0)
return ap_pstrcat(parms->pool, cmd->name, " not allowed here", NULL);
parms->info = cmd->cmd_data;
parms->cmd = cmd;
switch (cmd->args_how) {
case RAW_ARGS:
#ifdef RESOLVE_ENV_PER_TOKEN
args = ap_resolve_env(parms->pool,args);
#endif
return ((const char *(*)(cmd_parms *, void *, const char *))
(cmd->func)) (parms, mconfig, args);
case NO_ARGS:
if (*args != 0)
return ap_pstrcat(parms->pool, cmd->name, " takes no arguments",
NULL);
return ((const char *(*)(cmd_parms *, void *))
(cmd->func)) (parms, mconfig);
case TAKE1:
w = ap_getword_conf(parms->pool, &args);
if (*w == '\0' || *args != 0)
return ap_pstrcat(parms->pool, cmd->name, " takes one argument",
cmd->errmsg ? ", " : NULL, cmd->errmsg, NULL);
return ((const char *(*)(cmd_parms *, void *, const char *))
(cmd->func)) (parms, mconfig, w);
case TAKE2:
w = ap_getword_conf(parms->pool, &args);
w2 = ap_getword_conf(parms->pool, &args);
if (*w == '\0' || *w2 == '\0' || *args != 0)
return ap_pstrcat(parms->pool, cmd->name, " takes two arguments",
cmd->errmsg ? ", " : NULL, cmd->errmsg, NULL);
return ((const char *(*)(cmd_parms *, void *, const char *,
const char *)) (cmd->func)) (parms, mconfig, w, w2);
case TAKE12:
w = ap_getword_conf(parms->pool, &args);
w2 = ap_getword_conf(parms->pool, &args);
if (*w == '\0' || *args != 0)
return ap_pstrcat(parms->pool, cmd->name, " takes 1-2 arguments",
cmd->errmsg ? ", " : NULL, cmd->errmsg, NULL);
return ((const char *(*)(cmd_parms *, void *, const char *,
const char *)) (cmd->func)) (parms, mconfig, w,
*w2 ? w2 : NULL);
case TAKE3:
w = ap_getword_conf(parms->pool, &args);
w2 = ap_getword_conf(parms->pool, &args);
w3 = ap_getword_conf(parms->pool, &args);
if (*w == '\0' || *w2 == '\0' || *w3 == '\0' || *args != 0)
return ap_pstrcat(parms->pool, cmd->name, " takes three arguments",
cmd->errmsg ? ", " : NULL, cmd->errmsg, NULL);
return ((const char *(*)(cmd_parms *, void *, const char *,
const char *, const char *)) (cmd->func)) (parms,
mconfig, w, w2, w3);
case TAKE23:
w = ap_getword_conf(parms->pool, &args);
w2 = ap_getword_conf(parms->pool, &args);
w3 = *args ? ap_getword_conf(parms->pool, &args) : NULL;
if (*w == '\0' || *w2 == '\0' || *args != 0)
return ap_pstrcat(parms->pool, cmd->name,
" takes two or three arguments",
cmd->errmsg ? ", " : NULL, cmd->errmsg, NULL);
return ((const char *(*)(cmd_parms *, void *, const char *,
const char *, const char *)) (cmd->func)) (parms,
mconfig, w, w2, w3);
case TAKE123:
w = ap_getword_conf(parms->pool, &args);
w2 = *args ? ap_getword_conf(parms->pool, &args) : NULL;
w3 = *args ? ap_getword_conf(parms->pool, &args) : NULL;
if (*w == '\0' || *args != 0)
return ap_pstrcat(parms->pool, cmd->name,
" takes one, two or three arguments",
cmd->errmsg ? ", " : NULL, cmd->errmsg, NULL);
return ((const char *(*)(cmd_parms *, void *, const char *,
const char *, const char *)) (cmd->func)) (parms,
mconfig, w, w2, w3);
case TAKE13:
w = ap_getword_conf(parms->pool, &args);
w2 = *args ? ap_getword_conf(parms->pool, &args) : NULL;
w3 = *args ? ap_getword_conf(parms->pool, &args) : NULL;
if (*w == '\0' || (*w2 && !w3) || *args != 0)
return ap_pstrcat(parms->pool, cmd->name,
" takes one or three arguments",
cmd->errmsg ? ", " : NULL, cmd->errmsg, NULL);
return ((const char *(*)(cmd_parms *, void *, const char *,
const char *, const char *)) (cmd->func)) (parms,
mconfig, w, w2, w3);
case ITERATE:
while (*(w = ap_getword_conf(parms->pool, &args)) != '\0')
if ((errmsg = ((const char *(*)(cmd_parms *, void *,
const char *)) (cmd->func)) (parms, mconfig, w)))
return errmsg;
return NULL;
case ITERATE2:
w = ap_getword_conf(parms->pool, &args);
if (*w == '\0' || *args == 0)
return ap_pstrcat(parms->pool, cmd->name,
" requires at least two arguments",
cmd->errmsg ? ", " : NULL, cmd->errmsg, NULL);
while (*(w2 = ap_getword_conf(parms->pool, &args)) != '\0')
if ((errmsg = ((const char *(*)(cmd_parms *, void *,
const char *, const char *)) (cmd->func)) (parms,
mconfig, w, w2)))
return errmsg;
return NULL;
case FLAG:
w = ap_getword_conf(parms->pool, &args);
if (*w == '\0' || (strcasecmp(w, "on") && strcasecmp(w, "off")))
return ap_pstrcat(parms->pool, cmd->name, " must be On or Off",
NULL);
return ((const char *(*)(cmd_parms *, void *, int))
(cmd->func)) (parms, mconfig, strcasecmp(w, "off") != 0);
default:
return ap_pstrcat(parms->pool, cmd->name,
" is improperly configured internally (server bug)",
NULL);
}
}
CORE_EXPORT(const command_rec *) ap_find_command(const char *name, const command_rec *cmds)
{
while (cmds->name)
if (!strcasecmp(name, cmds->name))
return cmds;
else
++cmds;
return NULL;
}
CORE_EXPORT(const command_rec *) ap_find_command_in_modules(const char *cmd_name, module **mod)
{
const command_rec *cmdp;
module *modp;
for (modp = *mod; modp; modp = modp->next)
if (modp->cmds && (cmdp = ap_find_command(cmd_name, modp->cmds))) {
*mod = modp;
return cmdp;
}
return NULL;
}
CORE_EXPORT(void *) ap_set_config_vectors(cmd_parms *parms, void *config, module *mod)
{
void *mconfig = ap_get_module_config(config, mod);
void *sconfig = ap_get_module_config(parms->server->module_config, mod);
if (!mconfig && mod->create_dir_config) {
mconfig = (*mod->create_dir_config) (parms->pool, parms->path);
ap_set_module_config(config, mod, mconfig);
}
if (!sconfig && mod->create_server_config) {
sconfig = (*mod->create_server_config) (parms->pool, parms->server);
ap_set_module_config(parms->server->module_config, mod, sconfig);
}
return mconfig;
}
static const char * ap_build_config_sub(ap_pool_t *p, ap_pool_t *temp_pool,
const configfile_t *cfp,
const char *l,
ap_directive_t **current,
ap_directive_t **curr_parent)
{
const char *args;
char *cmd_name;
ap_directive_t *newdir;
if (*l == '#' || *l == '\0')
return NULL;
#if RESOLVE_ENV_PER_TOKEN
args = l;
#else
args = ap_resolve_env(temp_pool, l);
#endif
cmd_name = ap_getword_conf(p, &args);
if (*cmd_name == '\0') {
/* Note: this branch should not occur. An empty line should have
* triggered the exit further above.
*/
return NULL;
}
newdir = ap_pcalloc(p, sizeof(ap_directive_t));
newdir->filename = cfp->name;
newdir->line_num = cfp->line_number;
newdir->directive = cmd_name;
newdir->args = ap_pstrdup(p, args);
if (cmd_name[0] == '<') {
if (cmd_name[1] != '/') {
(*current) = ap_add_node(curr_parent, *current, newdir, 1);
}
else if (*curr_parent == NULL) {
return ap_pstrcat(p, cmd_name,
" without matching <", cmd_name + 2,
" section", NULL);
}
else {
char *bracket = cmd_name + strlen(cmd_name) - 1;
if (*bracket != '>') {
return ap_pstrcat(p, cmd_name,
"> directive missing closing '>'", NULL);
}
*bracket = '\0';
if (strcasecmp(cmd_name + 2,
(*curr_parent)->directive + 1) != 0) {
return ap_pstrcat(p, "Expected </",
(*curr_parent)->directive + 1, "> but saw ",
cmd_name, ">", NULL);
}
*bracket = '>';
/* done with this section; move up a level */
*current = *curr_parent;
*curr_parent = (*current)->parent;
}
}
else {
*current = ap_add_node(curr_parent, *current, newdir, 0);
}
return NULL;
}
static const char *ap_walk_config_sub(const ap_directive_t *current,
cmd_parms *parms, void *config)
{
module *mod = top_module;
while (1) {
const command_rec *cmd;
if (!(cmd = ap_find_command_in_modules(current->directive, &mod))) {
return ap_pstrcat(parms->pool, "Invalid command '",
current->directive,
"', perhaps mis-spelled or defined by a module "
"not included in the server configuration",
NULL);
}
else {
void *mconfig = ap_set_config_vectors(parms,config, mod);
const char *retval;
retval = invoke_cmd(cmd, parms, mconfig, current->args);
if (retval == NULL || strcmp(retval, DECLINE_CMD) != 0)
return retval;
mod = mod->next; /* Next time around, skip this one */
}
}
/* NOTREACHED */
}
API_EXPORT(const char *) ap_walk_config(ap_directive_t *current,
cmd_parms *parms, void *config)
{
void *oldconfig = parms->context;
parms->context = config;
/* scan through all directives, executing each one */
for (; current != NULL; current = current->next) {
const char *errmsg;
parms->directive = current;
/* actually parse the command and execute the correct function */
errmsg = ap_walk_config_sub(current, parms, config);
if (errmsg != NULL) {
/* restore the context (just in case) */
parms->context = oldconfig;
return errmsg;
}
}
parms->context = oldconfig;
return NULL;
}
API_EXPORT(const char *) ap_build_config(configfile_t *cfp,
ap_pool_t *p, ap_pool_t *temp_pool,
ap_directive_t **conftree)
{
ap_directive_t *current = NULL;
ap_directive_t *curr_parent = NULL;
char l[MAX_STRING_LEN];
const char *errmsg;
*conftree = NULL;
while (!(ap_cfg_getline(l, MAX_STRING_LEN, cfp))) {
errmsg = ap_build_config_sub(p, temp_pool, cfp, l,
&current, &curr_parent);
if (errmsg != NULL)
return errmsg;
if (*conftree == NULL && current != NULL) {
*conftree = current;
}
}
if (curr_parent != NULL) {
errmsg = "";
while (curr_parent != NULL) {
errmsg = ap_psprintf(p, "%s%s%s:%u: %s> was not closed.",
errmsg,
*errmsg == '\0' ? "" : "\n",
curr_parent->filename,
curr_parent->line_num,
curr_parent->directive);
curr_parent = curr_parent->parent;
}
return errmsg;
}
return NULL;
}
/*
* Generic command functions...
*/
API_EXPORT_NONSTD(const char *) ap_set_string_slot(cmd_parms *cmd,
char *struct_ptr, char *arg)
{
/* This one's pretty generic... */
int offset = (int) (long) cmd->info;
*(char **) (struct_ptr + offset) = arg;
return NULL;
}
API_EXPORT_NONSTD(const char *) ap_set_string_slot_lower(cmd_parms *cmd,
char *struct_ptr, char *arg)
{
/* This one's pretty generic... */
int offset = (int) (long) cmd->info;
ap_str_tolower(arg);
*(char **) (struct_ptr + offset) = arg;
return NULL;
}
API_EXPORT_NONSTD(const char *) ap_set_flag_slot(cmd_parms *cmd,
char *struct_ptr, int arg)
{
/* This one's pretty generic too... */
int offset = (int) (long) cmd->info;
*(int *) (struct_ptr + offset) = arg ? 1 : 0;
return NULL;
}
API_EXPORT_NONSTD(const char *) ap_set_file_slot(cmd_parms *cmd, char *struct_ptr, char *arg)
{
/* Prepend server_root to relative arg.
This allows .htaccess to be independent of server_root,
so the server can be moved or mirrored with less pain. */
char *p;
int offset = (int) (long) cmd->info;
if (ap_os_is_path_absolute(arg))
p = arg;
else
p = ap_make_full_path(cmd->pool, ap_server_root, arg);
*(char **) (struct_ptr + offset) = p;
return NULL;
}
/*****************************************************************
*
* Reading whole config files...
*/
static cmd_parms default_parms =
{NULL, 0, -1, NULL, NULL, NULL, NULL, NULL, NULL, NULL};
API_EXPORT(const char *) ap_server_root_relative(ap_pool_t *p, const char *file)
{
if(ap_os_is_path_absolute(file))
return file;
return ap_make_full_path(p, ap_server_root, file);
}
/* This structure and the following functions are needed for the
* table-based config file reading. They are passed to the
* cfg_open_custom() routine.
*/
/* Structure to be passed to cfg_open_custom(): it contains an
* index which is incremented from 0 to nelts on each call to
* cfg_getline() (which in turn calls arr_elts_getstr())
* and an ap_array_header_t pointer for the string array.
*/
typedef struct {
ap_array_header_t *array;
int curr_idx;
} arr_elts_param_t;
/* arr_elts_getstr() returns the next line from the string array. */
static void *arr_elts_getstr(void *buf, size_t bufsiz, void *param)
{
arr_elts_param_t *arr_param = (arr_elts_param_t *) param;
/* End of array reached? */
if (++arr_param->curr_idx > arr_param->array->nelts)
return NULL;
/* return the line */
ap_cpystrn(buf, ((char **) arr_param->array->elts)[arr_param->curr_idx - 1], bufsiz);
return buf;
}
/* arr_elts_close(): dummy close routine (makes sure no more lines can be read) */
static int arr_elts_close(void *param)
{
arr_elts_param_t *arr_param = (arr_elts_param_t *) param;
arr_param->curr_idx = arr_param->array->nelts;
return 0;
}
static void process_command_config(server_rec *s, ap_array_header_t *arr, ap_pool_t *p,
ap_pool_t *ptemp)
{
const char *errmsg;
cmd_parms parms;
arr_elts_param_t arr_parms;
ap_directive_t *conftree;
configfile_t *cfp;
arr_parms.curr_idx = 0;
arr_parms.array = arr;
parms = default_parms;
parms.pool = p;
parms.temp_pool = ptemp;
parms.server = s;
parms.override = (RSRC_CONF | OR_ALL) & ~(OR_AUTHCFG | OR_LIMIT);
cfp = ap_pcfg_open_custom(p, "-c/-C directives",
&arr_parms, NULL,
arr_elts_getstr, arr_elts_close);
errmsg = ap_build_config(cfp, p, ptemp, &conftree);
if (errmsg == NULL)
errmsg = ap_walk_config(conftree, &parms, s->lookup_defaults);
if (errmsg) {
ap_log_error(APLOG_MARK, APLOG_STARTUP | APLOG_NOERRNO, 0, NULL,
"Syntax error in -C/-c directive:\n%s", errmsg);
exit(1);
}
ap_cfg_closefile(cfp);
}
void ap_process_resource_config(server_rec *s, const char *fname, ap_pool_t *p, ap_pool_t *ptemp)
{
cmd_parms parms;
ap_finfo_t finfo;
ap_directive_t *conftree;
const char *errmsg;
configfile_t *cfp;
fname = ap_server_root_relative(p, fname);
/* don't require conf/httpd.conf if we have a -C or -c switch */
if((ap_server_pre_read_config->nelts || ap_server_post_read_config->nelts) &&
!(strcmp(fname, ap_server_root_relative(p, SERVER_CONFIG_FILE)))) {
if (ap_stat(&finfo, fname, p) != APR_SUCCESS)
return;
}
/* GCC's initialization extensions are soooo nice here... */
parms = default_parms;
parms.pool = p;
parms.temp_pool = ptemp;
parms.server = s;
parms.override = (RSRC_CONF | OR_ALL) & ~(OR_AUTHCFG | OR_LIMIT);
if (ap_pcfg_openfile(&cfp, p, fname) != APR_SUCCESS) {
ap_log_error(APLOG_MARK, APLOG_STARTUP | APLOG_NOERRNO, 0, NULL,
"%s: could not open document config file %s",
ap_server_argv0, fname);
exit(1);
}
errmsg = ap_build_config(cfp, p, ptemp, &conftree);
if (errmsg == NULL)
errmsg = ap_walk_config(conftree, &parms, s->lookup_defaults);
if (errmsg != NULL) {
/* ### wrong line number. need to pull from ap_directive_t */
ap_log_error(APLOG_MARK, APLOG_STARTUP | APLOG_NOERRNO, 0, NULL,
"Syntax error on line %d of %s:",
cfp->line_number, cfp->name);
ap_log_error(APLOG_MARK, APLOG_STARTUP | APLOG_NOERRNO, 0, NULL,
"%s", errmsg);
exit(1);
}
ap_cfg_closefile(cfp);
}
int ap_parse_htaccess(void **result, request_rec *r, int override,
const char *d, const char *access_name)
{
configfile_t *f = NULL;
cmd_parms parms;
char *filename = NULL;
const struct htaccess_result *cache;
struct htaccess_result *new;
void *dc = NULL;
ap_status_t status;
/* firstly, search cache */
for (cache = r->htaccess; cache != NULL; cache = cache->next)
if (cache->override == override && strcmp(cache->dir, d) == 0) {
if (cache->htaccess != NULL)
*result = cache->htaccess;
return OK;
}
parms = default_parms;
parms.override = override;
parms.pool = r->pool;
parms.temp_pool = r->pool;
parms.server = r->server;
parms.path = ap_pstrdup(r->pool, d);
/* loop through the access names and find the first one */
while (access_name[0]) {
filename = ap_make_full_path(r->pool, d,
ap_getword_conf(r->pool, &access_name));
status = ap_pcfg_openfile(&f, r->pool, filename);
if (status == APR_SUCCESS) {
const char *errmsg;
ap_directive_t *conftree;
dc = ap_create_per_dir_config(r->pool);
errmsg = ap_build_config(f, r->pool, r->pool, &conftree);
if (errmsg == NULL)
errmsg = ap_walk_config(conftree, &parms, dc);
ap_cfg_closefile(f);
if (errmsg) {
ap_log_rerror(APLOG_MARK, APLOG_ALERT|APLOG_NOERRNO, 0, r,
"%s: %s", filename, errmsg);
return HTTP_INTERNAL_SERVER_ERROR;
}
*result = dc;
break;
} else {
ap_status_t cerr = ap_canonical_error(status);
if (cerr != APR_ENOENT && cerr != APR_ENOTDIR) {
ap_log_rerror(APLOG_MARK, APLOG_CRIT, status, r,
"%s pcfg_openfile: unable to check htaccess file, "
"ensure it is readable",
filename);
ap_table_setn(r->notes, "error-notes",
"Server unable to read htaccess file, denying "
"access to be safe");
return HTTP_FORBIDDEN;
}
}
}
/* cache it */
new = ap_palloc(r->pool, sizeof(struct htaccess_result));
new->dir = parms.path;
new->override = override;
new->htaccess = dc;
/* add to head of list */
new->next = r->htaccess;
r->htaccess = new;
return OK;
}
CORE_EXPORT(const char *) ap_init_virtual_host(ap_pool_t *p, const char *hostname,
server_rec *main_server, server_rec **ps)
{
server_rec *s = (server_rec *) ap_pcalloc(p, sizeof(server_rec));
#ifdef RLIMIT_NOFILE
struct rlimit limits;
getrlimit(RLIMIT_NOFILE, &limits);
if (limits.rlim_cur < limits.rlim_max) {
limits.rlim_cur += 2;
if (setrlimit(RLIMIT_NOFILE, &limits) < 0) {
perror("setrlimit(RLIMIT_NOFILE)");
ap_log_error(APLOG_MARK, APLOG_STARTUP | APLOG_NOERRNO, 0, NULL,
"Cannot exceed hard limit for open files");
}
}
#endif
/* TODO: this crap belongs in http_core */
s->process = main_server->process;
s->server_admin = NULL;
s->server_hostname = NULL;
s->error_fname = NULL;
s->timeout = 0;
s->keep_alive_timeout = 0;
s->keep_alive = -1;
s->keep_alive_max = -1;
s->error_log = main_server->error_log;
s->loglevel = main_server->loglevel;
/* useful default, otherwise we get a port of 0 on redirects */
s->port = main_server->port;
s->next = NULL;
s->is_virtual = 1;
s->names = ap_make_array(p, 4, sizeof(char **));
s->wild_names = ap_make_array(p, 4, sizeof(char **));
s->module_config = create_empty_config(p);
s->lookup_defaults = ap_create_per_dir_config(p);
#if 0
s->server_uid = ap_user_id;
s->server_gid = ap_group_id;
#endif
s->limit_req_line = main_server->limit_req_line;
s->limit_req_fieldsize = main_server->limit_req_fieldsize;
s->limit_req_fields = main_server->limit_req_fields;
*ps = s;
return ap_parse_vhost_addrs(p, hostname, s);
}
static void fixup_virtual_hosts(ap_pool_t *p, server_rec *main_server)
{
server_rec *virt;
for (virt = main_server->next; virt; virt = virt->next) {
merge_server_configs(p, main_server->module_config,
virt->module_config);
virt->lookup_defaults =
ap_merge_per_dir_configs(p, main_server->lookup_defaults,
virt->lookup_defaults);
if (virt->server_admin == NULL)
virt->server_admin = main_server->server_admin;
if (virt->timeout == 0)
virt->timeout = main_server->timeout;
if (virt->keep_alive_timeout == 0)
virt->keep_alive_timeout = main_server->keep_alive_timeout;
if (virt->keep_alive == -1)
virt->keep_alive = main_server->keep_alive;
if (virt->keep_alive_max == -1)
virt->keep_alive_max = main_server->keep_alive_max;
/* XXX: this is really something that should be dealt with by a
* post-config api phase */
ap_core_reorder_directories(p, virt);
}
ap_core_reorder_directories(p, main_server);
}
/*****************************************************************
*
* Getting *everything* configured...
*/
static void init_config_globals(ap_pool_t *p)
{
/* Global virtual host hash bucket pointers. Init to null. */
ap_init_vhost_config(p);
}
static server_rec *init_server_config(process_rec *process, ap_pool_t *p)
{
server_rec *s = (server_rec *) ap_pcalloc(p, sizeof(server_rec));
ap_open_stderr(&s->error_log, p);
s->process = process;
s->port = 0;
s->server_admin = DEFAULT_ADMIN;
s->server_hostname = NULL;
s->error_fname = DEFAULT_ERRORLOG;
s->loglevel = DEFAULT_LOGLEVEL;
s->limit_req_line = DEFAULT_LIMIT_REQUEST_LINE;
s->limit_req_fieldsize = DEFAULT_LIMIT_REQUEST_FIELDSIZE;
s->limit_req_fields = DEFAULT_LIMIT_REQUEST_FIELDS;
s->timeout = DEFAULT_TIMEOUT;
s->keep_alive_timeout = DEFAULT_KEEPALIVE_TIMEOUT;
s->keep_alive_max = DEFAULT_KEEPALIVE;
s->keep_alive = 1;
s->next = NULL;
s->addrs = ap_pcalloc(p, sizeof(server_addr_rec));
/* NOT virtual host; don't match any real network interface */
s->addrs->host_addr.s_addr = htonl(INADDR_ANY);
s->addrs->host_port = 0; /* matches any port */
s->addrs->virthost = ""; /* must be non-NULL */
s->names = s->wild_names = NULL;
s->module_config = create_server_config(p, s);
s->lookup_defaults = create_default_per_dir_config(p);
return s;
}
server_rec *ap_read_config(process_rec *process, ap_pool_t *ptemp, const char *confname)
{
ap_pool_t *p = process->pconf;
server_rec *s = init_server_config(process, p);
init_config_globals(p);
/* All server-wide config files now have the SAME syntax... */
process_command_config(s, ap_server_pre_read_config, p, ptemp);
ap_process_resource_config(s, confname, p, ptemp);
process_command_config(s, ap_server_post_read_config, p, ptemp);
fixup_virtual_hosts(p, s);
ap_fini_vhost_config(p, s);
ap_sort_hooks();
return s;
}
void ap_single_module_configure(ap_pool_t *p, server_rec *s, module *m)
{
if (m->create_server_config)
ap_set_module_config(s->module_config, m,
(*m->create_server_config)(p, s));
if (m->create_dir_config)
ap_set_module_config(s->lookup_defaults, m,
(*m->create_dir_config)(p, NULL));
}
void ap_run_pre_config(ap_pool_t *p, ap_pool_t *plog, ap_pool_t *ptemp)
{
module *m;
for (m = top_module; m; m = m->next)
if (m->pre_config)
(*m->pre_config) (p, plog, ptemp);
init_handlers(p);
}
void ap_post_config_hook(ap_pool_t *pconf, ap_pool_t *plog, ap_pool_t *ptemp, server_rec *s)
{
ap_run_post_config(pconf,plog,ptemp,s);
init_handlers(pconf);
}
void ap_child_init_hook(ap_pool_t *pchild, server_rec *s)
{
/* TODO: uh this seems ugly, is there a better way? */
/*ap_child_init_alloc(); PUT THIS BACK IN XXXXX */
ap_run_child_init(pchild,s);
}
/********************************************************************
* Configuration directives are restricted in terms of where they may
* appear in the main configuration files and/or .htaccess files according
* to the bitmask req_override in the command_rec structure.
* If any of the overrides set in req_override are also allowed in the
* context in which the command is read, then the command is allowed.
* The context is determined as follows:
*
* inside *.conf --> override = (RSRC_CONF|OR_ALL)&~(OR_AUTHCFG|OR_LIMIT);
* within <Directory> or <Location> --> override = OR_ALL|ACCESS_CONF;
* within .htaccess --> override = AllowOverride for current directory;
*
* the result is, well, a rather confusing set of possibilities for when
* a particular directive is allowed to be used. This procedure prints
* in English where the given (pc) directive can be used.
*/
static void show_overrides(const command_rec *pc, module *pm)
{
int n = 0;
printf("\tAllowed in *.conf ");
if ((pc->req_override & (OR_OPTIONS | OR_FILEINFO | OR_INDEXES)) ||
((pc->req_override & RSRC_CONF) &&
((pc->req_override & (ACCESS_CONF | OR_AUTHCFG | OR_LIMIT)))))
printf("anywhere");
else if (pc->req_override & RSRC_CONF)
printf("only outside <Directory>, <Files> or <Location>");
else
printf("only inside <Directory>, <Files> or <Location>");
/* Warn if the directive is allowed inside <Directory> or .htaccess
* but module doesn't support per-dir configuration */
if ((pc->req_override & (OR_ALL | ACCESS_CONF)) && !pm->create_dir_config)
printf(" [no per-dir config]");
if (pc->req_override & OR_ALL) {
printf(" and in .htaccess\n\twhen AllowOverride");
if ((pc->req_override & OR_ALL) == OR_ALL)
printf(" isn't None");
else {
printf(" includes ");
if (pc->req_override & OR_AUTHCFG) {
if (n++)
printf(" or ");
printf("AuthConfig");
}
if (pc->req_override & OR_LIMIT) {
if (n++)
printf(" or ");
printf("Limit");
}
if (pc->req_override & OR_OPTIONS) {
if (n++)
printf(" or ");
printf("Options");
}
if (pc->req_override & OR_FILEINFO) {
if (n++)
printf(" or ");
printf("FileInfo");
}
if (pc->req_override & OR_INDEXES) {
if (n++)
printf(" or ");
printf("Indexes");
}
}
}
printf("\n");
}
/* Show the preloaded configuration directives, the help string explaining
* the directive arguments, in what module they are handled, and in
* what parts of the configuration they are allowed. Used for httpd -h.
*/
void ap_show_directives()
{
const command_rec *pc;
int n;
for (n = 0; ap_loaded_modules[n]; ++n)
for (pc = ap_loaded_modules[n]->cmds; pc && pc->name; ++pc) {
printf("%s (%s)\n", pc->name, ap_loaded_modules[n]->name);
if (pc->errmsg)
printf("\t%s\n", pc->errmsg);
show_overrides(pc, ap_loaded_modules[n]);
}
}
/* Show the preloaded module names. Used for httpd -l. */
void ap_show_modules()
{
int n;
printf("Compiled in modules:\n");
for (n = 0; ap_loaded_modules[n]; ++n)
printf(" %s\n", ap_loaded_modules[n]->name);
}
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