mod_info.c

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    ap_rputs(" -D APACHE_MPM_DIR=\"" APACHE_MPM_DIR "\"\n", r);
#endif

#ifdef HAVE_SHMGET
    ap_rputs(" -D HAVE_SHMGET\n", r);
#endif

#if APR_FILE_BASED_SHM
    ap_rputs(" -D APR_FILE_BASED_SHM\n", r);
#endif

#if APR_HAS_SENDFILE
    ap_rputs(" -D APR_HAS_SENDFILE\n", r);
#endif

#if APR_HAS_MMAP
    ap_rputs(" -D APR_HAS_MMAP\n", r);
#endif

#ifdef NO_WRITEV
    ap_rputs(" -D NO_WRITEV\n", r);
#endif

#ifdef NO_LINGCLOSE
    ap_rputs(" -D NO_LINGCLOSE\n", r);
#endif

#if APR_HAVE_IPV6
    ap_rputs(" -D APR_HAVE_IPV6 (IPv4-mapped addresses ", r);
#ifdef AP_ENABLE_V4_MAPPED
    ap_rputs("enabled)\n", r);
#else
    ap_rputs("disabled)\n", r);
#endif
#endif

#if APR_USE_FLOCK_SERIALIZE
    ap_rputs(" -D APR_USE_FLOCK_SERIALIZE\n", r);
#endif

#if APR_USE_SYSVSEM_SERIALIZE
    ap_rputs(" -D APR_USE_SYSVSEM_SERIALIZE\n", r);
#endif

#if APR_USE_POSIXSEM_SERIALIZE
    ap_rputs(" -D APR_USE_POSIXSEM_SERIALIZE\n", r);
#endif

#if APR_USE_FCNTL_SERIALIZE
    ap_rputs(" -D APR_USE_FCNTL_SERIALIZE\n", r);
#endif

#if APR_USE_PROC_PTHREAD_SERIALIZE
    ap_rputs(" -D APR_USE_PROC_PTHREAD_SERIALIZE\n", r);
#endif
#if APR_PROCESS_LOCK_IS_GLOBAL
    ap_rputs(" -D APR_PROCESS_LOCK_IS_GLOBAL\n", r);
#endif

#ifdef SINGLE_LISTEN_UNSERIALIZED_ACCEPT
    ap_rputs(" -D SINGLE_LISTEN_UNSERIALIZED_ACCEPT\n", r);
#endif

#if APR_HAS_OTHER_CHILD
    ap_rputs(" -D APR_HAS_OTHER_CHILD\n", r);
#endif

#ifdef AP_HAVE_RELIABLE_PIPED_LOGS
    ap_rputs(" -D AP_HAVE_RELIABLE_PIPED_LOGS\n", r);
#endif

#ifdef BUFFERED_LOGS
    ap_rputs(" -D BUFFERED_LOGS\n", r);
#ifdef PIPE_BUF
    ap_rputs(" -D PIPE_BUF=%ld\n", (long) PIPE_BUF, r);
#endif
#endif

#if APR_CHARSET_EBCDIC
    ap_rputs(" -D APR_CHARSET_EBCDIC\n", r);
#endif

#ifdef NEED_HASHBANG_EMUL
    ap_rputs(" -D NEED_HASHBANG_EMUL\n", r);
#endif

#ifdef SHARED_CORE
    ap_rputs(" -D SHARED_CORE\n", r);
#endif

/* This list displays the compiled in default paths: */
#ifdef HTTPD_ROOT
    ap_rputs(" -D HTTPD_ROOT=\"" HTTPD_ROOT "\"\n", r);
#endif

#ifdef SUEXEC_BIN
    ap_rputs(" -D SUEXEC_BIN=\"" SUEXEC_BIN "\"\n", r);
#endif

#if defined(SHARED_CORE) && defined(SHARED_CORE_DIR)
    ap_rputs(" -D SHARED_CORE_DIR=\"" SHARED_CORE_DIR "\"\n", r);
#endif

#ifdef DEFAULT_PIDLOG
    ap_rputs(" -D DEFAULT_PIDLOG=\"" DEFAULT_PIDLOG "\"\n", r);
#endif

#ifdef DEFAULT_SCOREBOARD
    ap_rputs(" -D DEFAULT_SCOREBOARD=\"" DEFAULT_SCOREBOARD "\"\n", r);
#endif

#ifdef DEFAULT_LOCKFILE
    ap_rputs(" -D DEFAULT_LOCKFILE=\"" DEFAULT_LOCKFILE "\"\n", r);
#endif

#ifdef DEFAULT_ERRORLOG
    ap_rputs(" -D DEFAULT_ERRORLOG=\"" DEFAULT_ERRORLOG "\"\n", r);
#endif


#ifdef AP_TYPES_CONFIG_FILE
    ap_rputs(" -D AP_TYPES_CONFIG_FILE=\"" AP_TYPES_CONFIG_FILE "\"\n", r);
#endif

#ifdef SERVER_CONFIG_FILE
    ap_rputs(" -D SERVER_CONFIG_FILE=\"" SERVER_CONFIG_FILE "\"\n", r);
#endif
    ap_rputs("</tt></dt>\n", r);
    ap_rputs("</dl><hr />", r);
    return 0;
}

static int dump_a_hook(request_rec * r, hook_get_t hook_get)
{
    int i;
    char qs;
    hook_struct_t *elts;
    apr_array_header_t *hooks = hook_get();

    if (!hooks) {
        return 0;
    }

    if (r->args && strcasecmp(r->args, "hooks") == 0) {
        qs = '?';
    }
    else {
        qs = '#';
    }

    elts = (hook_struct_t *) hooks->elts;

    for (i = 0; i < hooks->nelts; i++) {
        ap_rprintf(r,
                   "&nbsp;&nbsp; %02d <a href=\"%c%s\">%s</a> <br/>",
                   elts[i].nOrder, qs, elts[i].szName, elts[i].szName);
    }
    return 0;
}

static int show_active_hooks(request_rec * r)
{
    int i;
    ap_rputs("<h2><a name=\"startup_hooks\">Startup Hooks</a></h2>\n<dl>", r);

    for (i = 0; startup_hooks[i].name; i++) {
        ap_rprintf(r, "<dt><strong>%s:</strong>\n <br /><tt>\n",
                   startup_hooks[i].name);
        dump_a_hook(r, startup_hooks[i].get);
        ap_rputs("\n  </tt>\n</dt>\n", r);
    }

    ap_rputs
        ("</dl>\n<hr />\n<h2><a name=\"request_hooks\">Request Hooks</a></h2>\n<dl>",
         r);

    for (i = 0; request_hooks[i].name; i++) {
        ap_rprintf(r, "<dt><strong>%s:</strong>\n <br /><tt>\n",
                   request_hooks[i].name);
        dump_a_hook(r, request_hooks[i].get);
        ap_rputs("\n  </tt>\n</dt>\n", r);
    }

    ap_rputs("</dl>\n<hr />\n", r);

    return 0;
}

static int display_info(request_rec * r)
{
    module *modp = NULL;
    server_rec *serv = r->server;
    const char *more_info;
    const command_rec *cmd = NULL;
    int comma = 0;

    if (strcmp(r->handler, "server-info"))
        return DECLINED;

    r->allowed |= (AP_METHOD_BIT << M_GET);
    if (r->method_number != M_GET)
        return DECLINED;

    ap_set_content_type(r, "text/html; charset=ISO-8859-1");

    ap_rputs(DOCTYPE_XHTML_1_0T
             "<html xmlns=\"http://www.w3.org/1999/xhtml\">\n"
             "<head>\n"
             "  <title>Server Information</title>\n" "</head>\n", r);
    ap_rputs("<body><h1 style=\"text-align: center\">"
             "Apache Server Information</h1>\n", r);
    if (!r->args || strcasecmp(r->args, "list")) {
        if (!r->args) {
            ap_rputs("<dl><dt><tt>Subpages:<br />", r);
            ap_rputs("<a href=\"?config\">Configuration Files</a>, "
                     "<a href=\"?server\">Server Settings</a>, "
                     "<a href=\"?list\">Module List</a>,  "
                     "<a href=\"?hooks\">Active Hooks</a>", r);
            ap_rputs("</tt></dt></dl><hr />", r);

            ap_rputs("<dl><dt><tt>Sections:<br />", r);
            ap_rputs("<a href=\"#server\">Server Settings</a>, "
                     "<a href=\"#startup_hooks\">Startup Hooks</a>, "
                     "<a href=\"#request_hooks\">Request Hooks</a>", r);
            ap_rputs("</tt></dt></dl><hr />", r);

            ap_rputs("<dl><dt><tt>Loaded Modules: <br />", r);
            /* TODO: Sort by Alpha */
            for (modp = ap_top_module; modp; modp = modp->next) {
                ap_rprintf(r, "<a href=\"#%s\">%s</a>", modp->name,
                           modp->name);
                if (modp->next) {
                    ap_rputs(", ", r);
                }
            }
            ap_rputs("</tt></dt></dl><hr />", r);
        }

        if (!r->args || !strcasecmp(r->args, "server")) {
            show_server_settings(r);
        }

        if (!r->args || !strcasecmp(r->args, "hooks")) {
            show_active_hooks(r);
        }

        if (r->args && 0 == strcasecmp(r->args, "config")) {
            ap_rputs("<dl><dt><strong>Configuration:</strong>\n", r);
            mod_info_module_cmds(r, NULL, ap_conftree, 0, 0);
            ap_rputs("</dl><hr />", r);
        }
        else {
            for (modp = ap_top_module; modp; modp = modp->next) {
                if (!r->args || !strcasecmp(modp->name, r->args)) {
                    ap_rprintf(r,
                               "<dl><dt><a name=\"%s\"><strong>Module Name:</strong></a> "
                               "<font size=\"+1\"><tt><a href=\"?%s\">%s</a></tt></font></dt>\n",
                               modp->name, modp->name, modp->name);
                    ap_rputs("<dt><strong>Content handlers:</strong> ", r);

                    if (module_find_hook(modp, ap_hook_get_handler)) {
                        ap_rputs("<tt> <em>yes</em></tt>", r);
                    }
                    else {
                        ap_rputs("<tt> <em>none</em></tt>", r);
                    }

                    ap_rputs("</dt>", r);
                    ap_rputs
                        ("<dt><strong>Configuration Phase Participation:</strong>\n",
                         r);
                    if (modp->create_dir_config) {
                        if (comma) {
                            ap_rputs(", ", r);
                        }
                        ap_rputs("<tt>Create Directory Config</tt>", r);
                        comma = 1;
                    }
                    if (modp->merge_dir_config) {
                        if (comma) {
                            ap_rputs(", ", r);
                        }
                        ap_rputs("<tt>Merge Directory Configs</tt>", r);
                        comma = 1;
                    }
                    if (modp->create_server_config) {
                        if (comma) {
                            ap_rputs(", ", r);
                        }
                        ap_rputs("<tt>Create Server Config</tt>", r);
                        comma = 1;
                    }
                    if (modp->merge_server_config) {
                        if (comma) {
                            ap_rputs(", ", r);
                        }
                        ap_rputs("<tt>Merge Server Configs</tt>", r);
                        comma = 1;
                    }
                    if (!comma)
                        ap_rputs("<tt> <em>none</em></tt>", r);
                    comma = 0;
                    ap_rputs("</dt>", r);

                    module_request_hook_participate(r, modp);

                    cmd = modp->cmds;
                    if (cmd) {
                        ap_rputs
                            ("<dt><strong>Module Directives:</strong></dt>",
                             r);
                        while (cmd) {
                            if (cmd->name) {
                                ap_rprintf(r, "<dd><tt>%s%s - <i>",
                                           ap_escape_html(r->pool, cmd->name),
                                           cmd->name[0] == '<' ? "&gt;" : "");
                                if (cmd->errmsg) {
                                    ap_rputs(ap_escape_html(r->pool, cmd->errmsg), r);
                                }
                                ap_rputs("</i></tt></dd>\n", r);
                            }
                            else {
                                break;
                            }
                            cmd++;
                        }
                        ap_rputs
                            ("<dt><strong>Current Configuration:</strong></dt>\n",
                             r);
                        mod_info_module_cmds(r, modp->cmds, ap_conftree, 0,
                                             0);
                    }
                    else {
                        ap_rputs
                            ("<dt><strong>Module Directives:</strong> <tt>none</tt></dt>",
                             r);
                    }
                    more_info = find_more_info(serv, modp->name);
                    if (more_info) {
                        ap_rputs
                            ("<dt><strong>Additional Information:</strong>\n</dt><dd>",
                             r);
                        ap_rputs(more_info, r);
                        ap_rputs("</dd>", r);
                    }
                    ap_rputs("</dl><hr />\n", r);
                    if (r->args) {
                        break;
                    }
                }
            }
            if (!modp && r->args && strcasecmp(r->args, "server")) {
                ap_rputs("<p><b>No such module</b></p>\n", r);
            }
        }
    }
    else {
        ap_rputs("<dl><dt>Server Module List</dt>", r);
        for (modp = ap_top_module; modp; modp = modp->next) {
            ap_rputs("<dd>", r);
            ap_rputs(modp->name, r);
            ap_rputs("</dd>", r);
        }
        ap_rputs("</dl><hr />", r);
    }
    ap_rputs(ap_psignature("", r), r);
    ap_rputs("</body></html>\n", r);
    /* Done, turn off timeout, close file and return */
    return 0;
}

static const char *add_module_info(cmd_parms * cmd, void *dummy,
                                   const char *name, const char *info)
{
    server_rec *s = cmd->server;
    info_svr_conf *conf =
        (info_svr_conf *) ap_get_module_config(s->module_config,
                                               &info_module);
    info_entry *new = apr_array_push(conf->more_info);

    new->name = name;
    new->info = info;
    return NULL;
}

static const command_rec info_cmds[] = {
    AP_INIT_TAKE2("AddModuleInfo", add_module_info, NULL, RSRC_CONF,
                  "a module name and additional information on that module"),
    {NULL}
};

static void register_hooks(apr_pool_t * p)
{
    ap_hook_handler(display_info, NULL, NULL, APR_HOOK_MIDDLE);
}

module AP_MODULE_DECLARE_DATA info_module = {
    STANDARD20_MODULE_STUFF,
    NULL,                       /* dir config creater */
    NULL,                       /* dir merger --- default is to override */
    create_info_config,         /* server config */
    merge_info_config,          /* merge server config */
    info_cmds,                  /* command apr_table_t */
    register_hooks
};