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Posted to dev@httpd.apache.org by sameer <sa...@c2.net> on 1997/11/08 00:43:26 UTC
[MODULE]
/* ====================================================================
* Copyright (c) 1995-1997 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. 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
* 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 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/>.
*
*/
/* How to create .so files on various platforms:
FreeBSD:
"gcc -fpic" to compile
"ld -Bshareable" to link
See for instructions on more platforms:
http://developer.netscape.com/library/documentation/enterprise/unix/svrplug.htm#1013807
*/
#include "httpd.h"
#include "http_config.h"
/* Os-specific stuff that goes in conf.h */
#if defined(LINUX) || defined(__FreeBSD__) || defined(SOLARIS) || \
defined(__bsdi__) || defined(IRIX)
#define HAS_DLFCN
#endif
#if defined(__FreeBSD__)
#define NEED_RTLD_LAZY
#define NEED_UNDERSCORE_SYM
#endif
/* OSes that don't support dlopen */
#if defined(UW) || defined(ULTRIX)
#define NO_DL
#endif
/* Start of real module */
#ifdef HAS_DLFCN
#include <dlfcn.h>
#else
#define NEED_RTLD_LAZY
void * dlopen (__const char * __filename, int __flag);
__const char * dlerror (void);
void * dlsym (void *, __const char *);
int dlclose (void *);
#endif
#ifdef NEED_RTLD_LAZY
#define RTLD_LAZY 1
#endif
/*
* The hard part of implementing LoadModule is deciding what to do about
* rereading the config files. This proof-of-concept implementation takes the
* cheap way out: we only actually load the modules the first time through.
*/
static int been_there_done_that = 0; /* Loaded the modules yet? */
static int have_symbol_table = 0;
#ifndef NO_DLOPEN
static const char *load_module (cmd_parms *cmd, void *dummy, char *modname, char *filename)
{
void *modhandle;
module *modp;
const char *szModuleFile=server_root_relative(cmd->pool, filename);
if (been_there_done_that) return NULL;
if (!(modhandle = dlopen(szModuleFile, RTLD_LAZY)))
{
char *my_error = dlerror();
return pstrcat (cmd->pool, "Cannot load ", szModuleFile,
" into server: ", my_error, ":", dlerror(),
NULL);
}
/* If I knew what the correct cast is here, I'd be happy. But
* I don't. So I'll use (void *). It works.
*/
#ifdef NEED_UNDERSCORE_SYM
modname = pstrcat(cmd->pool, "_", modname, NULL);
#endif
if (!(modp = (module *)(dlsym (modhandle, modname)))) {
return pstrcat (cmd->pool, "Can't find module ", modname,
" in file ", filename, ":", dlerror(), NULL);
}
add_module (modp);
/* Alethea Patch (rws,djw2) - need to run configuration functions
in new modules */
if (modp->create_server_config)
((void**)cmd->server->module_config)[modp->module_index]=
(*modp->create_server_config)(cmd->pool, cmd->server);
if (modp->create_dir_config)
((void**)cmd->server->lookup_defaults)[modp->module_index]=
(*modp->create_dir_config)(cmd->pool, NULL);
return NULL;
}
static const char *load_file (cmd_parms *cmd, void *dummy, char *filename)
{
if (been_there_done_that) return NULL;
if (!dlopen(server_root_relative(cmd->pool, filename), 1))
return pstrcat (cmd->pool, "Cannot load ", filename, " into server", NULL);
return NULL;
}
#else
static const char *load_file(cmd_parms *cmd, void *dummy, char *filename)
{
if(!been_there_done_that)
fprintf(stderr, "WARNING: LoadFile not supported\n");
return NULL;
}
static const char *load_module(cmd_parms *cmd, void *dummy, char *modname, char *filename)
{
if(!been_there_done_that)
fprintf(stderr, "WARNING: LoadModule not supported\n");
return NULL;
}
#endif
static void check_loaded_modules (server_rec *dummy, pool *p)
{
if (been_there_done_that) return;
been_there_done_that = 1;
}
command_rec so_cmds[] = {
{ "LoadModule", load_module, NULL, RSRC_CONF, TAKE2,
"a module name, and the name of a file to load it from"},
{ "LoadFile", load_file, NULL, RSRC_CONF, ITERATE,
"files or libraries to link into the server at runtime"},
{ NULL }
};
module so_module = {
STANDARD_MODULE_STUFF,
check_loaded_modules, /* initializer */
NULL, /* create per-dir config */
NULL, /* merge per-dir config */
NULL, /* server config */
NULL, /* merge server config */
so_cmds, /* command table */
NULL, /* handlers */
NULL, /* filename translation */
NULL, /* check_user_id */
NULL, /* check auth */
NULL, /* check access */
NULL, /* type_checker */
NULL, /* logger */
NULL /* header parser */
};
--
Sameer Parekh Voice: 510-986-8770
President FAX: 510-986-8777
C2Net
http://www.c2.net/ sameer@c2.net
Re: [MODULE]
Posted by Brian Behlendorf <br...@organic.com>.
At 03:43 PM 11/7/97 -0800, sameer wrote:
>/* How to create .so files on various platforms:
I +1 this for 1.3. Mark it as experimental if it makes you happy. If we
don't think it's a bugfix for mod_dld, maybe it's a mod_so?
Brian
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