summaryrefslogtreecommitdiffstats
path: root/rubbos/app/httpd-2.0.64/modules/loggers/mod_log_config.c
diff options
context:
space:
mode:
Diffstat (limited to 'rubbos/app/httpd-2.0.64/modules/loggers/mod_log_config.c')
-rw-r--r--rubbos/app/httpd-2.0.64/modules/loggers/mod_log_config.c1519
1 files changed, 1519 insertions, 0 deletions
diff --git a/rubbos/app/httpd-2.0.64/modules/loggers/mod_log_config.c b/rubbos/app/httpd-2.0.64/modules/loggers/mod_log_config.c
new file mode 100644
index 00000000..2bfdf348
--- /dev/null
+++ b/rubbos/app/httpd-2.0.64/modules/loggers/mod_log_config.c
@@ -0,0 +1,1519 @@
+/* Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/*
+ * Modified by djm@va.pubnix.com:
+ * If no TransferLog is given explicitly, decline to log.
+ *
+ * This is module implements the TransferLog directive (same as the
+ * common log module), and additional directives, LogFormat and CustomLog.
+ *
+ *
+ * Syntax:
+ *
+ * TransferLog fn Logs transfers to fn in standard log format, unless
+ * a custom format is set with LogFormat
+ * LogFormat format Set a log format from TransferLog files
+ * CustomLog fn format
+ * Log to file fn with format given by the format
+ * argument
+ *
+ * CookieLog fn For backwards compatability with old Cookie
+ * logging module - now deprecated.
+ *
+ * There can be any number of TransferLog and CustomLog
+ * commands. Each request will be logged to _ALL_ the
+ * named files, in the appropriate format.
+ *
+ * If no TransferLog or CustomLog directive appears in a VirtualHost,
+ * the request will be logged to the log file(s) defined outside
+ * the virtual host section. If a TransferLog or CustomLog directive
+ * appears in the VirtualHost section, the log files defined outside
+ * the VirtualHost will _not_ be used. This makes this module compatable
+ * with the CLF and config log modules, where the use of TransferLog
+ * inside the VirtualHost section overrides its use outside.
+ *
+ * Examples:
+ *
+ * TransferLog logs/access_log
+ * <VirtualHost>
+ * LogFormat "... custom format ..."
+ * TransferLog log/virtual_only
+ * CustomLog log/virtual_useragents "%t %{user-agent}i"
+ * </VirtualHost>
+ *
+ * This will log using CLF to access_log any requests handled by the
+ * main server, while any requests to the virtual host will be logged
+ * with the "... custom format..." to virtual_only _AND_ using
+ * the custom user-agent log to virtual_useragents.
+ *
+ * Note that the NCSA referer and user-agent logs are easily added with
+ * CustomLog:
+ * CustomLog logs/referer "%{referer}i -> %U"
+ * CustomLog logs/agent "%{user-agent}i"
+ *
+ * RefererIgnore functionality can be obtained with conditional
+ * logging (SetEnvIf and CustomLog ... env=!VAR).
+ *
+ * But using this method allows much easier modification of the
+ * log format, e.g. to log hosts along with UA:
+ * CustomLog logs/referer "%{referer}i %U %h"
+ *
+ * The argument to LogFormat and CustomLog is a string, which can include
+ * literal characters copied into the log files, and '%' directives as
+ * follows:
+ *
+ * %...B: bytes sent, excluding HTTP headers.
+ * %...b: bytes sent, excluding HTTP headers in CLF format, i.e. a '-'
+ * when no bytes where sent (rather than a '0'.
+ * %...{FOOBAR}C: The contents of the HTTP cookie FOOBAR
+ * %...{FOOBAR}e: The contents of the environment variable FOOBAR
+ * %...f: filename
+ * %...h: remote host
+ * %...a: remote IP-address
+ * %...A: local IP-address
+ * %...{Foobar}i: The contents of Foobar: header line(s) in the request
+ * sent to the client.
+ * %...l: remote logname (from identd, if supplied)
+ * %...{Foobar}n: The contents of note "Foobar" from another module.
+ * %...{Foobar}o: The contents of Foobar: header line(s) in the reply.
+ * %...p: the port the request was served to
+ * %...P: the process ID of the child that serviced the request.
+ * %...{format}P: the process ID or thread ID of the child/thread that
+ * serviced the request
+ * %...r: first line of request
+ * %...s: status. For requests that got internally redirected, this
+ * is status of the *original* request --- %...>s for the last.
+ * %...t: time, in common log format time format
+ * %...{format}t: The time, in the form given by format, which should
+ * be in strftime(3) format.
+ * %...T: the time taken to serve the request, in seconds.
+ * %...D: the time taken to serve the request, in micro seconds.
+ * %...u: remote user (from auth; may be bogus if return status (%s) is 401)
+ * %...U: the URL path requested.
+ * %...v: the configured name of the server (i.e. which virtual host?)
+ * %...V: the server name according to the UseCanonicalName setting
+ * %...m: the request method
+ * %...H: the request protocol
+ * %...q: the query string prepended by "?", or empty if no query string
+ * %...X: Status of the connection.
+ * 'X' = connection aborted before the response completed.
+ * '+' = connection may be kept alive after the response is sent.
+ * '-' = connection will be closed after the response is sent.
+ (This directive was %...c in late versions of Apache 1.3, but
+ this conflicted with the historical ssl %...{var}c syntax.)
+*
+ * The '...' can be nothing at all (e.g. "%h %u %r %s %b"), or it can
+ * indicate conditions for inclusion of the item (which will cause it
+ * to be replaced with '-' if the condition is not met). Note that
+ * there is no escaping performed on the strings from %r, %...i and
+ * %...o; some with long memories may remember that I thought this was
+ * a bad idea, once upon a time, and I'm still not comfortable with
+ * it, but it is difficult to see how to "do the right thing" with all
+ * of '%..i', unless we URL-escape everything and break with CLF.
+ *
+ * The forms of condition are a list of HTTP status codes, which may
+ * or may not be preceded by '!'. Thus, '%400,501{User-agent}i' logs
+ * User-agent: on 400 errors and 501 errors (Bad Request, Not
+ * Implemented) only; '%!200,304,302{Referer}i' logs Referer: on all
+ * requests which did *not* return some sort of normal status.
+ *
+ * The default LogFormat reproduces CLF; see below.
+ *
+ * The way this is supposed to work with virtual hosts is as follows:
+ * a virtual host can have its own LogFormat, or its own TransferLog.
+ * If it doesn't have its own LogFormat, it inherits from the main
+ * server. If it doesn't have its own TransferLog, it writes to the
+ * same descriptor (meaning the same process for "| ...").
+ *
+ * --- rst */
+
+#include "apr_strings.h"
+#include "apr_lib.h"
+#include "apr_hash.h"
+#include "apr_optional.h"
+#include "apr_anylock.h"
+
+#define APR_WANT_STRFUNC
+#include "apr_want.h"
+
+#include "ap_config.h"
+#include "mod_log_config.h"
+#include "httpd.h"
+#include "http_config.h"
+#include "http_core.h" /* For REMOTE_NAME */
+#include "http_log.h"
+#include "http_protocol.h"
+#include "util_time.h"
+#include "ap_mpm.h"
+
+#if APR_HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+#ifdef HAVE_LIMITS_H
+#include <limits.h>
+#endif
+
+#define DEFAULT_LOG_FORMAT "%h %l %u %t \"%r\" %>s %b"
+
+module AP_MODULE_DECLARE_DATA log_config_module;
+
+#ifndef APR_LARGEFILE
+#define APR_LARGEFILE 0
+#endif
+
+static int xfer_flags = (APR_WRITE | APR_APPEND | APR_CREATE | APR_LARGEFILE);
+static apr_fileperms_t xfer_perms = APR_OS_DEFAULT;
+static apr_hash_t *log_hash;
+static apr_status_t ap_default_log_writer(request_rec *r,
+ void *handle,
+ const char **strs,
+ int *strl,
+ int nelts,
+ apr_size_t len);
+static apr_status_t ap_buffered_log_writer(request_rec *r,
+ void *handle,
+ const char **strs,
+ int *strl,
+ int nelts,
+ apr_size_t len);
+static void *ap_default_log_writer_init(apr_pool_t *p, server_rec *s,
+ const char* name);
+static void *ap_buffered_log_writer_init(apr_pool_t *p, server_rec *s,
+ const char* name);
+
+static void ap_log_set_writer_init(ap_log_writer_init *handle);
+static void ap_log_set_writer(ap_log_writer *handle);
+static ap_log_writer *log_writer = ap_default_log_writer;
+static ap_log_writer_init *log_writer_init = ap_default_log_writer_init;
+static int buffered_logs = 0; /* default unbuffered */
+static apr_array_header_t *all_buffered_logs = NULL;
+
+/* POSIX.1 defines PIPE_BUF as the maximum number of bytes that is
+ * guaranteed to be atomic when writing a pipe. And PIPE_BUF >= 512
+ * is guaranteed. So we'll just guess 512 in the event the system
+ * doesn't have this. Now, for file writes there is actually no limit,
+ * the entire write is atomic. Whether all systems implement this
+ * correctly is another question entirely ... so we'll just use PIPE_BUF
+ * because it's probably a good guess as to what is implemented correctly
+ * everywhere.
+ */
+#ifdef PIPE_BUF
+#define LOG_BUFSIZE PIPE_BUF
+#else
+#define LOG_BUFSIZE (512)
+#endif
+
+/*
+ * multi_log_state is our per-(virtual)-server configuration. We store
+ * an array of the logs we are going to use, each of type config_log_state.
+ * If a default log format is given by LogFormat, store in default_format
+ * (backward compat. with mod_log_config). We also store for each virtual
+ * server a pointer to the logs specified for the main server, so that if this
+ * vhost has no logs defined, we can use the main server's logs instead.
+ *
+ * So, for the main server, config_logs contains a list of the log files
+ * and server_config_logs is empty. For a vhost, server_config_logs
+ * points to the same array as config_logs in the main server, and
+ * config_logs points to the array of logs defined inside this vhost,
+ * which might be empty.
+ */
+
+typedef struct {
+ const char *default_format_string;
+ apr_array_header_t *default_format;
+ apr_array_header_t *config_logs;
+ apr_array_header_t *server_config_logs;
+ apr_table_t *formats;
+} multi_log_state;
+
+/*
+ * config_log_state holds the status of a single log file. fname might
+ * be NULL, which means this module does no logging for this
+ * request. format might be NULL, in which case the default_format
+ * from the multi_log_state should be used, or if that is NULL as
+ * well, use the CLF.
+ * log_writer is NULL before the log file is opened and is
+ * set to a opaque structure (usually a fd) after it is opened.
+
+ */
+typedef struct {
+ apr_file_t *handle;
+ apr_size_t outcnt;
+ char outbuf[LOG_BUFSIZE];
+ apr_anylock_t mutex;
+} buffered_log;
+
+typedef struct {
+ const char *fname;
+ const char *format_string;
+ apr_array_header_t *format;
+ void *log_writer;
+ char *condition_var;
+} config_log_state;
+
+/*
+ * Format items...
+ * Note that many of these could have ap_sprintfs replaced with static buffers.
+ */
+
+typedef struct {
+ ap_log_handler_fn_t *func;
+ char *arg;
+ int condition_sense;
+ int want_orig;
+ apr_array_header_t *conditions;
+} log_format_item;
+
+static char *format_integer(apr_pool_t *p, int i)
+{
+ return apr_itoa(p, i);
+}
+
+static char *pfmt(apr_pool_t *p, int i)
+{
+ if (i <= 0) {
+ return "-";
+ }
+ else {
+ return format_integer(p, i);
+ }
+}
+
+static const char *constant_item(request_rec *dummy, char *stuff)
+{
+ return stuff;
+}
+
+static const char *log_remote_host(request_rec *r, char *a)
+{
+ return ap_escape_logitem(r->pool, ap_get_remote_host(r->connection,
+ r->per_dir_config,
+ REMOTE_NAME, NULL));
+}
+
+static const char *log_remote_address(request_rec *r, char *a)
+{
+ return r->connection->remote_ip;
+}
+
+static const char *log_local_address(request_rec *r, char *a)
+{
+ return r->connection->local_ip;
+}
+
+static const char *log_remote_logname(request_rec *r, char *a)
+{
+ return ap_escape_logitem(r->pool, ap_get_remote_logname(r));
+}
+
+static const char *log_remote_user(request_rec *r, char *a)
+{
+ char *rvalue = r->user;
+
+ if (rvalue == NULL) {
+ rvalue = "-";
+ }
+ else if (strlen(rvalue) == 0) {
+ rvalue = "\"\"";
+ }
+ else {
+ rvalue = ap_escape_logitem(r->pool, rvalue);
+ }
+
+ return rvalue;
+}
+
+static const char *log_request_line(request_rec *r, char *a)
+{
+ /* NOTE: If the original request contained a password, we
+ * re-write the request line here to contain XXXXXX instead:
+ * (note the truncation before the protocol string for HTTP/0.9 requests)
+ * (note also that r->the_request contains the unmodified request)
+ */
+ return ap_escape_logitem(r->pool,
+ (r->parsed_uri.password)
+ ? apr_pstrcat(r->pool, r->method, " ",
+ apr_uri_unparse(r->pool,
+ &r->parsed_uri, 0),
+ r->assbackwards ? NULL : " ",
+ r->protocol, NULL)
+ : r->the_request);
+}
+
+static const char *log_request_file(request_rec *r, char *a)
+{
+ return ap_escape_logitem(r->pool, r->filename);
+}
+static const char *log_request_uri(request_rec *r, char *a)
+{
+ return ap_escape_logitem(r->pool, r->uri);
+}
+static const char *log_request_method(request_rec *r, char *a)
+{
+ return ap_escape_logitem(r->pool, r->method);
+}
+static const char *log_request_protocol(request_rec *r, char *a)
+{
+ return ap_escape_logitem(r->pool, r->protocol);
+}
+static const char *log_request_query(request_rec *r, char *a)
+{
+ return (r->args) ? apr_pstrcat(r->pool, "?",
+ ap_escape_logitem(r->pool, r->args), NULL)
+ : "";
+}
+static const char *log_status(request_rec *r, char *a)
+{
+ return pfmt(r->pool, r->status);
+}
+
+static const char *clf_log_bytes_sent(request_rec *r, char *a)
+{
+ if (!r->sent_bodyct || !r->bytes_sent) {
+ return "-";
+ }
+ else {
+ return apr_off_t_toa(r->pool, r->bytes_sent);
+ }
+}
+
+static const char *log_bytes_sent(request_rec *r, char *a)
+{
+ if (!r->sent_bodyct || !r->bytes_sent) {
+ return "0";
+ }
+ else {
+ return apr_psprintf(r->pool, "%" APR_OFF_T_FMT, r->bytes_sent);
+ }
+}
+
+
+static const char *log_header_in(request_rec *r, char *a)
+{
+ return ap_escape_logitem(r->pool, apr_table_get(r->headers_in, a));
+}
+
+static APR_INLINE char *find_multiple_headers(apr_pool_t *pool,
+ const apr_table_t *table,
+ const char *key)
+{
+ const apr_array_header_t *elts;
+ const apr_table_entry_t *t_elt;
+ const apr_table_entry_t *t_end;
+ apr_size_t len;
+ struct sle {
+ struct sle *next;
+ const char *value;
+ apr_size_t len;
+ } *result_list, *rp;
+
+ elts = apr_table_elts(table);
+
+ if (!elts->nelts) {
+ return NULL;
+ }
+
+ t_elt = (const apr_table_entry_t *)elts->elts;
+ t_end = t_elt + elts->nelts;
+ len = 1; /* \0 */
+ result_list = rp = NULL;
+
+ do {
+ if (!strcasecmp(t_elt->key, key)) {
+ if (!result_list) {
+ result_list = rp = apr_palloc(pool, sizeof(*rp));
+ }
+ else {
+ rp = rp->next = apr_palloc(pool, sizeof(*rp));
+ len += 2; /* ", " */
+ }
+
+ rp->next = NULL;
+ rp->value = t_elt->val;
+ rp->len = strlen(rp->value);
+
+ len += rp->len;
+ }
+ ++t_elt;
+ } while (t_elt < t_end);
+
+ if (result_list) {
+ char *result = apr_palloc(pool, len);
+ char *cp = result;
+
+ rp = result_list;
+ while (rp) {
+ if (rp != result_list) {
+ *cp++ = ',';
+ *cp++ = ' ';
+ }
+ memcpy(cp, rp->value, rp->len);
+ cp += rp->len;
+ rp = rp->next;
+ }
+ *cp = '\0';
+
+ return result;
+ }
+
+ return NULL;
+}
+
+static const char *log_header_out(request_rec *r, char *a)
+{
+ const char *cp = NULL;
+
+ if (!strcasecmp(a, "Content-type") && r->content_type) {
+ cp = ap_field_noparam(r->pool, r->content_type);
+ }
+ else if (!strcasecmp(a, "Set-Cookie")) {
+ cp = find_multiple_headers(r->pool, r->headers_out, a);
+ }
+ else {
+ cp = apr_table_get(r->headers_out, a);
+ }
+
+ return ap_escape_logitem(r->pool, cp);
+}
+
+static const char *log_note(request_rec *r, char *a)
+{
+ return ap_escape_logitem(r->pool, apr_table_get(r->notes, a));
+}
+static const char *log_env_var(request_rec *r, char *a)
+{
+ return ap_escape_logitem(r->pool, apr_table_get(r->subprocess_env, a));
+}
+
+static const char *log_cookie(request_rec *r, char *a)
+{
+ const char *cookies;
+ const char *start_cookie;
+
+ if ((cookies = apr_table_get(r->headers_in, "Cookie"))) {
+ if ((start_cookie = ap_strstr_c(cookies,a))) {
+ char *cookie, *end_cookie;
+ start_cookie += strlen(a) + 1; /* cookie_name + '=' */
+ cookie = apr_pstrdup(r->pool, start_cookie);
+ /* kill everything in cookie after ';' */
+ end_cookie = strchr(cookie, ';');
+ if (end_cookie) {
+ *end_cookie = '\0';
+ }
+ return ap_escape_logitem(r->pool, cookie);
+ }
+ }
+ return NULL;
+}
+
+static const char *log_request_time_custom(request_rec *r, char *a,
+ apr_time_exp_t *xt)
+{
+ apr_size_t retcode;
+ char tstr[MAX_STRING_LEN];
+ apr_strftime(tstr, &retcode, sizeof(tstr), a, xt);
+ return apr_pstrdup(r->pool, tstr);
+}
+
+#define DEFAULT_REQUEST_TIME_SIZE 32
+typedef struct {
+ unsigned t;
+ char timestr[DEFAULT_REQUEST_TIME_SIZE];
+ unsigned t_validate;
+} cached_request_time;
+
+#define TIME_CACHE_SIZE 4
+#define TIME_CACHE_MASK 3
+static cached_request_time request_time_cache[TIME_CACHE_SIZE];
+
+static const char *log_request_time(request_rec *r, char *a)
+{
+ apr_time_exp_t xt;
+
+ /* ### I think getting the time again at the end of the request
+ * just for logging is dumb. i know it's "required" for CLF.
+ * folks writing log parsing tools don't realise that out of order
+ * times have always been possible (consider what happens if one
+ * process calculates the time to log, but then there's a context
+ * switch before it writes and before that process is run again the
+ * log rotation occurs) and they should just fix their tools rather
+ * than force the server to pay extra cpu cycles. if you've got
+ * a problem with this, you can set the define. -djg
+ */
+ if (a && *a) { /* Custom format */
+ /* The custom time formatting uses a very large temp buffer
+ * on the stack. To avoid using so much stack space in the
+ * common case where we're not using a custom format, the code
+ * for the custom format in a separate function. (That's why
+ * log_request_time_custom is not inlined right here.)
+ */
+#ifdef I_INSIST_ON_EXTRA_CYCLES_FOR_CLF_COMPLIANCE
+ ap_explode_recent_localtime(&xt, apr_time_now());
+#else
+ ap_explode_recent_localtime(&xt, r->request_time);
+#endif
+ return log_request_time_custom(r, a, &xt);
+ }
+ else { /* CLF format */
+ /* This code uses the same technique as ap_explode_recent_localtime():
+ * optimistic caching with logic to detect and correct race conditions.
+ * See the comments in server/util_time.c for more information.
+ */
+ cached_request_time* cached_time = apr_palloc(r->pool,
+ sizeof(*cached_time));
+#ifdef I_INSIST_ON_EXTRA_CYCLES_FOR_CLF_COMPLIANCE
+ apr_time_t request_time = apr_time_now();
+#else
+ apr_time_t request_time = r->request_time;
+#endif
+ unsigned t_seconds = (unsigned)apr_time_sec(request_time);
+ unsigned i = t_seconds & TIME_CACHE_MASK;
+ memcpy(cached_time, &(request_time_cache[i]), sizeof(*cached_time));
+ if ((t_seconds != cached_time->t) ||
+ (t_seconds != cached_time->t_validate)) {
+
+ /* Invalid or old snapshot, so compute the proper time string
+ * and store it in the cache
+ */
+ char sign;
+ int timz;
+
+ ap_explode_recent_localtime(&xt, request_time);
+ timz = xt.tm_gmtoff;
+ if (timz < 0) {
+ timz = -timz;
+ sign = '-';
+ }
+ else {
+ sign = '+';
+ }
+ cached_time->t = t_seconds;
+ apr_snprintf(cached_time->timestr, DEFAULT_REQUEST_TIME_SIZE,
+ "[%02d/%s/%d:%02d:%02d:%02d %c%.2d%.2d]",
+ xt.tm_mday, apr_month_snames[xt.tm_mon],
+ xt.tm_year+1900, xt.tm_hour, xt.tm_min, xt.tm_sec,
+ sign, timz / (60*60), (timz % (60*60)) / 60);
+ cached_time->t_validate = t_seconds;
+ memcpy(&(request_time_cache[i]), cached_time,
+ sizeof(*cached_time));
+ }
+ return cached_time->timestr;
+ }
+}
+
+static const char *log_request_duration(request_rec *r, char *a)
+{
+ apr_time_t duration = apr_time_now() - r->request_time;
+ return apr_psprintf(r->pool, "%" APR_TIME_T_FMT, apr_time_sec(duration));
+}
+
+static const char *log_request_duration_microseconds(request_rec *r, char *a)
+{
+ return apr_psprintf(r->pool, "%" APR_TIME_T_FMT,
+ (apr_time_now() - r->request_time));
+}
+
+/* These next two routines use the canonical name:port so that log
+ * parsers don't need to duplicate all the vhost parsing crud.
+ */
+static const char *log_virtual_host(request_rec *r, char *a)
+{
+ return ap_escape_logitem(r->pool, r->server->server_hostname);
+}
+
+static const char *log_server_port(request_rec *r, char *a)
+{
+ return apr_psprintf(r->pool, "%u",
+ r->server->port ? r->server->port : ap_default_port(r));
+}
+
+/* This respects the setting of UseCanonicalName so that
+ * the dynamic mass virtual hosting trick works better.
+ */
+static const char *log_server_name(request_rec *r, char *a)
+{
+ return ap_escape_logitem(r->pool, ap_get_server_name(r));
+}
+
+static const char *log_pid_tid(request_rec *r, char *a)
+{
+ if (*a == '\0' || !strcmp(a, "pid")) {
+ return apr_psprintf(r->pool, "%" APR_PID_T_FMT, getpid());
+ }
+ else if (!strcmp(a, "tid")) {
+#if APR_HAS_THREADS
+ apr_os_thread_t tid = apr_os_thread_current();
+#else
+ int tid = 0; /* APR will format "0" anyway but an arg is needed */
+#endif
+ return apr_psprintf(r->pool, "%pT", &tid);
+ }
+ /* bogus format */
+ return a;
+}
+
+static const char *log_connection_status(request_rec *r, char *a)
+{
+ if (r->connection->aborted)
+ return "X";
+
+ if (r->connection->keepalive == AP_CONN_KEEPALIVE &&
+ (!r->server->keep_alive_max ||
+ (r->server->keep_alive_max - r->connection->keepalives) > 0)) {
+ return "+";
+ }
+ return "-";
+}
+
+/*****************************************************************
+ *
+ * Parsing the log format string
+ */
+
+static char *parse_log_misc_string(apr_pool_t *p, log_format_item *it,
+ const char **sa)
+{
+ const char *s;
+ char *d;
+
+ it->func = constant_item;
+ it->conditions = NULL;
+
+ s = *sa;
+ while (*s && *s != '%') {
+ s++;
+ }
+ /*
+ * This might allocate a few chars extra if there's a backslash
+ * escape in the format string.
+ */
+ it->arg = apr_palloc(p, s - *sa + 1);
+
+ d = it->arg;
+ s = *sa;
+ while (*s && *s != '%') {
+ if (*s != '\\') {
+ *d++ = *s++;
+ }
+ else {
+ s++;
+ switch (*s) {
+ case '\\':
+ *d++ = '\\';
+ s++;
+ break;
+ case 'r':
+ *d++ = '\r';
+ s++;
+ break;
+ case 'n':
+ *d++ = '\n';
+ s++;
+ break;
+ case 't':
+ *d++ = '\t';
+ s++;
+ break;
+ default:
+ /* copy verbatim */
+ *d++ = '\\';
+ /*
+ * Allow the loop to deal with this *s in the normal
+ * fashion so that it handles end of string etc.
+ * properly.
+ */
+ break;
+ }
+ }
+ }
+ *d = '\0';
+
+ *sa = s;
+ return NULL;
+}
+
+static char *parse_log_item(apr_pool_t *p, log_format_item *it, const char **sa)
+{
+ const char *s = *sa;
+ ap_log_handler *handler;
+
+ if (*s != '%') {
+ return parse_log_misc_string(p, it, sa);
+ }
+
+ ++s;
+ it->condition_sense = 0;
+ it->conditions = NULL;
+
+ if (*s == '%') {
+ it->arg = "%";
+ it->func = constant_item;
+ *sa = ++s;
+
+ return NULL;
+ }
+
+ it->want_orig = -1;
+ it->arg = ""; /* For safety's sake... */
+
+ while (*s) {
+ int i;
+
+ switch (*s) {
+ case '!':
+ ++s;
+ it->condition_sense = !it->condition_sense;
+ break;
+
+ case '<':
+ ++s;
+ it->want_orig = 1;
+ break;
+
+ case '>':
+ ++s;
+ it->want_orig = 0;
+ break;
+
+ case ',':
+ ++s;
+ break;
+
+ case '{':
+ ++s;
+ it->arg = ap_getword(p, &s, '}');
+ break;
+
+ case '0':
+ case '1':
+ case '2':
+ case '3':
+ case '4':
+ case '5':
+ case '6':
+ case '7':
+ case '8':
+ case '9':
+ i = *s - '0';
+ while (apr_isdigit(*++s)) {
+ i = i * 10 + (*s) - '0';
+ }
+ if (!it->conditions) {
+ it->conditions = apr_array_make(p, 4, sizeof(int));
+ }
+ *(int *) apr_array_push(it->conditions) = i;
+ break;
+
+ default:
+ handler = (ap_log_handler *)apr_hash_get(log_hash, s++, 1);
+ if (!handler) {
+ char dummy[2];
+
+ dummy[0] = s[-1];
+ dummy[1] = '\0';
+ return apr_pstrcat(p, "Unrecognized LogFormat directive %",
+ dummy, NULL);
+ }
+ it->func = handler->func;
+ if (it->want_orig == -1) {
+ it->want_orig = handler->want_orig_default;
+ }
+ *sa = s;
+ return NULL;
+ }
+ }
+
+ return "Ran off end of LogFormat parsing args to some directive";
+}
+
+static apr_array_header_t *parse_log_string(apr_pool_t *p, const char *s, const char **err)
+{
+ apr_array_header_t *a = apr_array_make(p, 30, sizeof(log_format_item));
+ char *res;
+
+ while (*s) {
+ if ((res = parse_log_item(p, (log_format_item *) apr_array_push(a), &s))) {
+ *err = res;
+ return NULL;
+ }
+ }
+
+ s = APR_EOL_STR;
+ parse_log_item(p, (log_format_item *) apr_array_push(a), &s);
+ return a;
+}
+
+/*****************************************************************
+ *
+ * Actually logging.
+ */
+
+static const char *process_item(request_rec *r, request_rec *orig,
+ log_format_item *item)
+{
+ const char *cp;
+
+ /* First, see if we need to process this thing at all... */
+
+ if (item->conditions && item->conditions->nelts != 0) {
+ int i;
+ int *conds = (int *) item->conditions->elts;
+ int in_list = 0;
+
+ for (i = 0; i < item->conditions->nelts; ++i) {
+ if (r->status == conds[i]) {
+ in_list = 1;
+ break;
+ }
+ }
+
+ if ((item->condition_sense && in_list)
+ || (!item->condition_sense && !in_list)) {
+ return "-";
+ }
+ }
+
+ /* We do. Do it... */
+
+ cp = (*item->func) (item->want_orig ? orig : r, item->arg);
+ return cp ? cp : "-";
+}
+
+static void flush_log(buffered_log *buf)
+{
+ if (buf->outcnt && buf->handle != NULL) {
+ apr_file_write(buf->handle, buf->outbuf, &buf->outcnt);
+ buf->outcnt = 0;
+ }
+}
+
+
+static int config_log_transaction(request_rec *r, config_log_state *cls,
+ apr_array_header_t *default_format)
+{
+ log_format_item *items;
+ const char **strs;
+ int *strl;
+ request_rec *orig;
+ int i;
+ apr_size_t len = 0;
+ apr_array_header_t *format;
+ char *envar;
+ apr_status_t rv;
+
+ if (cls->fname == NULL) {
+ return DECLINED;
+ }
+
+ /*
+ * See if we've got any conditional envariable-controlled logging decisions
+ * to make.
+ */
+ if (cls->condition_var != NULL) {
+ envar = cls->condition_var;
+ if (*envar != '!') {
+ if (apr_table_get(r->subprocess_env, envar) == NULL) {
+ return DECLINED;
+ }
+ }
+ else {
+ if (apr_table_get(r->subprocess_env, &envar[1]) != NULL) {
+ return DECLINED;
+ }
+ }
+ }
+
+ format = cls->format ? cls->format : default_format;
+
+ strs = apr_palloc(r->pool, sizeof(char *) * (format->nelts));
+ strl = apr_palloc(r->pool, sizeof(int) * (format->nelts));
+ items = (log_format_item *) format->elts;
+
+ orig = r;
+ while (orig->prev) {
+ orig = orig->prev;
+ }
+ while (r->next) {
+ r = r->next;
+ }
+
+ for (i = 0; i < format->nelts; ++i) {
+ strs[i] = process_item(r, orig, &items[i]);
+ }
+
+ for (i = 0; i < format->nelts; ++i) {
+ len += strl[i] = strlen(strs[i]);
+ }
+ if (!log_writer) {
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, APR_EGENERAL, r,
+ "log writer isn't correctly setup");
+ return HTTP_INTERNAL_SERVER_ERROR;
+ }
+ rv = log_writer(r, cls->log_writer, strs, strl, format->nelts, len);
+ /* xxx: do we return an error on log_writer? */
+ return OK;
+}
+
+static int multi_log_transaction(request_rec *r)
+{
+ multi_log_state *mls = ap_get_module_config(r->server->module_config,
+ &log_config_module);
+ config_log_state *clsarray;
+ int i;
+
+ /*
+ * Log this transaction..
+ */
+ if (mls->config_logs->nelts) {
+ clsarray = (config_log_state *) mls->config_logs->elts;
+ for (i = 0; i < mls->config_logs->nelts; ++i) {
+ config_log_state *cls = &clsarray[i];
+
+ config_log_transaction(r, cls, mls->default_format);
+ }
+ }
+ else if (mls->server_config_logs) {
+ clsarray = (config_log_state *) mls->server_config_logs->elts;
+ for (i = 0; i < mls->server_config_logs->nelts; ++i) {
+ config_log_state *cls = &clsarray[i];
+
+ config_log_transaction(r, cls, mls->default_format);
+ }
+ }
+
+ return OK;
+}
+
+/*****************************************************************
+ *
+ * Module glue...
+ */
+
+static void *make_config_log_state(apr_pool_t *p, server_rec *s)
+{
+ multi_log_state *mls;
+
+ mls = (multi_log_state *) apr_palloc(p, sizeof(multi_log_state));
+ mls->config_logs = apr_array_make(p, 1, sizeof(config_log_state));
+ mls->default_format_string = NULL;
+ mls->default_format = NULL;
+ mls->server_config_logs = NULL;
+ mls->formats = apr_table_make(p, 4);
+ apr_table_setn(mls->formats, "CLF", DEFAULT_LOG_FORMAT);
+
+ return mls;
+}
+
+/*
+ * Use the merger to simply add a pointer from the vhost log state
+ * to the log of logs specified for the non-vhost configuration. Make sure
+ * vhosts inherit any globally-defined format names.
+ */
+
+static void *merge_config_log_state(apr_pool_t *p, void *basev, void *addv)
+{
+ multi_log_state *base = (multi_log_state *) basev;
+ multi_log_state *add = (multi_log_state *) addv;
+
+ add->server_config_logs = base->config_logs;
+ if (!add->default_format) {
+ add->default_format_string = base->default_format_string;
+ add->default_format = base->default_format;
+ }
+ add->formats = apr_table_overlay(p, base->formats, add->formats);
+
+ return add;
+}
+
+/*
+ * Set the default logfile format, or define a nickname for a format string.
+ */
+static const char *log_format(cmd_parms *cmd, void *dummy, const char *fmt,
+ const char *name)
+{
+ const char *err_string = NULL;
+ multi_log_state *mls = ap_get_module_config(cmd->server->module_config,
+ &log_config_module);
+
+ /*
+ * If we were given two arguments, the second is a name to be given to the
+ * format. This syntax just defines the nickname - it doesn't actually
+ * make the format the default.
+ */
+ if (name != NULL) {
+ parse_log_string(cmd->pool, fmt, &err_string);
+ if (err_string == NULL) {
+ apr_table_setn(mls->formats, name, fmt);
+ }
+ }
+ else {
+ mls->default_format_string = fmt;
+ mls->default_format = parse_log_string(cmd->pool, fmt, &err_string);
+ }
+ return err_string;
+}
+
+
+static const char *add_custom_log(cmd_parms *cmd, void *dummy, const char *fn,
+ const char *fmt, const char *envclause)
+{
+ const char *err_string = NULL;
+ multi_log_state *mls = ap_get_module_config(cmd->server->module_config,
+ &log_config_module);
+ config_log_state *cls;
+
+ cls = (config_log_state *) apr_array_push(mls->config_logs);
+ cls->condition_var = NULL;
+ if (envclause != NULL) {
+ if (strncasecmp(envclause, "env=", 4) != 0) {
+ return "error in condition clause";
+ }
+ if ((envclause[4] == '\0')
+ || ((envclause[4] == '!') && (envclause[5] == '\0'))) {
+ return "missing environment variable name";
+ }
+ cls->condition_var = apr_pstrdup(cmd->pool, &envclause[4]);
+ }
+
+ cls->fname = fn;
+ cls->format_string = fmt;
+ if (fmt == NULL) {
+ cls->format = NULL;
+ }
+ else {
+ cls->format = parse_log_string(cmd->pool, fmt, &err_string);
+ }
+ cls->log_writer = NULL;
+
+ return err_string;
+}
+
+static const char *set_transfer_log(cmd_parms *cmd, void *dummy,
+ const char *fn)
+{
+ return add_custom_log(cmd, dummy, fn, NULL, NULL);
+}
+
+static const char *set_cookie_log(cmd_parms *cmd, void *dummy, const char *fn)
+{
+ return add_custom_log(cmd, dummy, fn, "%{Cookie}n \"%r\" %t", NULL);
+}
+
+static const char *set_buffered_logs_on(cmd_parms *parms, void *dummy, int flag)
+{
+ buffered_logs = flag;
+ if (buffered_logs) {
+ ap_log_set_writer_init(ap_buffered_log_writer_init);
+ ap_log_set_writer(ap_buffered_log_writer);
+ }
+ return NULL;
+}
+static const command_rec config_log_cmds[] =
+{
+AP_INIT_TAKE23("CustomLog", add_custom_log, NULL, RSRC_CONF,
+ "a file name, a custom log format string or format name, "
+ "and an optional \"env=\" clause (see docs)"),
+AP_INIT_TAKE1("TransferLog", set_transfer_log, NULL, RSRC_CONF,
+ "the filename of the access log"),
+AP_INIT_TAKE12("LogFormat", log_format, NULL, RSRC_CONF,
+ "a log format string (see docs) and an optional format name"),
+AP_INIT_TAKE1("CookieLog", set_cookie_log, NULL, RSRC_CONF,
+ "the filename of the cookie log"),
+AP_INIT_FLAG("BufferedLogs", set_buffered_logs_on, NULL, RSRC_CONF,
+ "Enable Buffered Logging (experimental)"),
+ {NULL}
+};
+
+static config_log_state *open_config_log(server_rec *s, apr_pool_t *p,
+ config_log_state *cls,
+ apr_array_header_t *default_format)
+{
+ if (cls->log_writer != NULL) {
+ return cls; /* virtual config shared w/main server */
+ }
+
+ if (cls->fname == NULL) {
+ return cls; /* Leave it NULL to decline. */
+ }
+
+ cls->log_writer = log_writer_init(p, s, cls->fname);
+ if (cls->log_writer == NULL)
+ return NULL;
+
+ return cls;
+}
+
+static int open_multi_logs(server_rec *s, apr_pool_t *p)
+{
+ int i;
+ multi_log_state *mls = ap_get_module_config(s->module_config,
+ &log_config_module);
+ config_log_state *clsarray;
+ const char *dummy;
+ const char *format;
+
+ if (mls->default_format_string) {
+ format = apr_table_get(mls->formats, mls->default_format_string);
+ if (format) {
+ mls->default_format = parse_log_string(p, format, &dummy);
+ }
+ }
+
+ if (!mls->default_format) {
+ mls->default_format = parse_log_string(p, DEFAULT_LOG_FORMAT, &dummy);
+ }
+
+ if (mls->config_logs->nelts) {
+ clsarray = (config_log_state *) mls->config_logs->elts;
+ for (i = 0; i < mls->config_logs->nelts; ++i) {
+ config_log_state *cls = &clsarray[i];
+
+ if (cls->format_string) {
+ format = apr_table_get(mls->formats, cls->format_string);
+ if (format) {
+ cls->format = parse_log_string(p, format, &dummy);
+ }
+ }
+
+ if (!open_config_log(s, p, cls, mls->default_format)) {
+ /* Failure already logged by open_config_log */
+ return DONE;
+ }
+ }
+ }
+ else if (mls->server_config_logs) {
+ clsarray = (config_log_state *) mls->server_config_logs->elts;
+ for (i = 0; i < mls->server_config_logs->nelts; ++i) {
+ config_log_state *cls = &clsarray[i];
+
+ if (cls->format_string) {
+ format = apr_table_get(mls->formats, cls->format_string);
+ if (format) {
+ cls->format = parse_log_string(p, format, &dummy);
+ }
+ }
+
+ if (!open_config_log(s, p, cls, mls->default_format)) {
+ /* Failure already logged by open_config_log */
+ return DONE;
+ }
+ }
+ }
+
+ return OK;
+}
+
+
+static apr_status_t flush_all_logs(void *data)
+{
+ server_rec *s = data;
+ multi_log_state *mls;
+ apr_array_header_t *log_list;
+ config_log_state *clsarray;
+ buffered_log *buf;
+ int i;
+
+ if (!buffered_logs)
+ return APR_SUCCESS;
+
+ for (; s; s = s->next) {
+ mls = ap_get_module_config(s->module_config, &log_config_module);
+ log_list = NULL;
+ if (mls->config_logs->nelts) {
+ log_list = mls->config_logs;
+ }
+ else if (mls->server_config_logs) {
+ log_list = mls->server_config_logs;
+ }
+ if (log_list) {
+ clsarray = (config_log_state *) log_list->elts;
+ for (i = 0; i < log_list->nelts; ++i) {
+ buf = clsarray[i].log_writer;
+ flush_log(buf);
+ }
+ }
+ }
+ return APR_SUCCESS;
+}
+
+
+static int init_config_log(apr_pool_t *pc, apr_pool_t *p, apr_pool_t *pt, server_rec *s)
+{
+ int res;
+
+ /* First init the buffered logs array, which is needed when opening the logs. */
+ if (buffered_logs) {
+ all_buffered_logs = apr_array_make(p, 5, sizeof(buffered_log *));
+ }
+
+ /* Next, do "physical" server, which gets default log fd and format
+ * for the virtual servers, if they don't override...
+ */
+ res = open_multi_logs(s, p);
+
+ /* Then, virtual servers */
+
+ for (s = s->next; (res == OK) && s; s = s->next) {
+ res = open_multi_logs(s, p);
+ }
+
+ return res;
+}
+
+static void init_child(apr_pool_t *p, server_rec *s)
+{
+ int mpm_threads;
+
+ ap_mpm_query(AP_MPMQ_MAX_THREADS, &mpm_threads);
+
+ /* Now register the last buffer flush with the cleanup engine */
+ if (buffered_logs) {
+ int i;
+ buffered_log **array = (buffered_log **)all_buffered_logs->elts;
+
+ apr_pool_cleanup_register(p, s, flush_all_logs, flush_all_logs);
+
+ for (i = 0; i < all_buffered_logs->nelts; i++) {
+ buffered_log *this = array[i];
+
+#if APR_HAS_THREADS
+ if (mpm_threads > 1) {
+ apr_status_t rv;
+
+ this->mutex.type = apr_anylock_threadmutex;
+ rv = apr_thread_mutex_create(&this->mutex.lock.tm,
+ APR_THREAD_MUTEX_DEFAULT,
+ p);
+ if (rv != APR_SUCCESS) {
+ ap_log_error(APLOG_MARK, APLOG_CRIT, rv, s,
+ "could not initialize buffered log mutex, "
+ "transfer log may become corrupted");
+ this->mutex.type = apr_anylock_none;
+ }
+ }
+ else
+#endif
+ {
+ this->mutex.type = apr_anylock_none;
+ }
+ }
+ }
+}
+
+static void ap_register_log_handler(apr_pool_t *p, char *tag,
+ ap_log_handler_fn_t *handler, int def)
+{
+ ap_log_handler *log_struct = apr_palloc(p, sizeof(*log_struct));
+ log_struct->func = handler;
+ log_struct->want_orig_default = def;
+
+ apr_hash_set(log_hash, tag, 1, (const void *)log_struct);
+}
+static void ap_log_set_writer_init(ap_log_writer_init *handle)
+{
+ log_writer_init = handle;
+
+}
+static void ap_log_set_writer(ap_log_writer *handle)
+{
+ log_writer = handle;
+}
+
+static apr_status_t ap_default_log_writer( request_rec *r,
+ void *handle,
+ const char **strs,
+ int *strl,
+ int nelts,
+ apr_size_t len)
+
+{
+ char *str;
+ char *s;
+ int i;
+ apr_status_t rv;
+
+ str = apr_palloc(r->pool, len + 1);
+
+ for (i = 0, s = str; i < nelts; ++i) {
+ memcpy(s, strs[i], strl[i]);
+ s += strl[i];
+ }
+
+ rv = apr_file_write((apr_file_t*)handle, str, &len);
+
+ return rv;
+}
+static void *ap_default_log_writer_init(apr_pool_t *p, server_rec *s,
+ const char* name)
+{
+ if (*name == '|') {
+ piped_log *pl;
+
+ pl = ap_open_piped_log(p, name + 1);
+ if (pl == NULL) {
+ return NULL;;
+ }
+ return ap_piped_log_write_fd(pl);
+ }
+ else {
+ const char *fname = ap_server_root_relative(p, name);
+ apr_file_t *fd;
+ apr_status_t rv;
+
+ if (!fname) {
+ ap_log_error(APLOG_MARK, APLOG_ERR, APR_EBADPATH, s,
+ "invalid transfer log path %s.", name);
+ return NULL;
+ }
+ rv = apr_file_open(&fd, fname, xfer_flags, xfer_perms, p);
+ if (rv != APR_SUCCESS) {
+ ap_log_error(APLOG_MARK, APLOG_ERR, rv, s,
+ "could not open transfer log file %s.", fname);
+ return NULL;
+ }
+ return fd;
+ }
+}
+static void *ap_buffered_log_writer_init(apr_pool_t *p, server_rec *s,
+ const char* name)
+{
+ buffered_log *b;
+ b = apr_pcalloc(p, sizeof(buffered_log));
+ b->handle = ap_default_log_writer_init(p, s, name);
+
+ if (b->handle) {
+ *(buffered_log **)apr_array_push(all_buffered_logs) = b;
+ return b;
+ }
+ else
+ return NULL;
+}
+static apr_status_t ap_buffered_log_writer(request_rec *r,
+ void *handle,
+ const char **strs,
+ int *strl,
+ int nelts,
+ apr_size_t len)
+
+{
+ char *str;
+ char *s;
+ int i;
+ apr_status_t rv;
+ buffered_log *buf = (buffered_log*)handle;
+
+ if ((rv = APR_ANYLOCK_LOCK(&buf->mutex)) != APR_SUCCESS) {
+ return rv;
+ }
+
+ if (len + buf->outcnt > LOG_BUFSIZE) {
+ flush_log(buf);
+ }
+ if (len >= LOG_BUFSIZE) {
+ apr_size_t w;
+
+ str = apr_palloc(r->pool, len + 1);
+ for (i = 0, s = str; i < nelts; ++i) {
+ memcpy(s, strs[i], strl[i]);
+ s += strl[i];
+ }
+ w = len;
+ rv = apr_file_write(buf->handle, str, &w);
+
+ }
+ else {
+ for (i = 0, s = &buf->outbuf[buf->outcnt]; i < nelts; ++i) {
+ memcpy(s, strs[i], strl[i]);
+ s += strl[i];
+ }
+ buf->outcnt += len;
+ rv = APR_SUCCESS;
+ }
+
+ APR_ANYLOCK_UNLOCK(&buf->mutex);
+ return rv;
+}
+
+static int log_pre_config(apr_pool_t *p, apr_pool_t *plog, apr_pool_t *ptemp)
+{
+ static APR_OPTIONAL_FN_TYPE(ap_register_log_handler) *log_pfn_register;
+
+ log_pfn_register = APR_RETRIEVE_OPTIONAL_FN(ap_register_log_handler);
+
+ if (log_pfn_register) {
+ log_pfn_register(p, "h", log_remote_host, 0);
+ log_pfn_register(p, "a", log_remote_address, 0 );
+ log_pfn_register(p, "A", log_local_address, 0 );
+ log_pfn_register(p, "l", log_remote_logname, 0);
+ log_pfn_register(p, "u", log_remote_user, 0);
+ log_pfn_register(p, "t", log_request_time, 0);
+ log_pfn_register(p, "f", log_request_file, 0);
+ log_pfn_register(p, "b", clf_log_bytes_sent, 0);
+ log_pfn_register(p, "B", log_bytes_sent, 0);
+ log_pfn_register(p, "i", log_header_in, 0);
+ log_pfn_register(p, "o", log_header_out, 0);
+ log_pfn_register(p, "n", log_note, 0);
+ log_pfn_register(p, "e", log_env_var, 0);
+ log_pfn_register(p, "V", log_server_name, 0);
+ log_pfn_register(p, "v", log_virtual_host, 0);
+ log_pfn_register(p, "p", log_server_port, 0);
+ log_pfn_register(p, "P", log_pid_tid, 0);
+ log_pfn_register(p, "H", log_request_protocol, 0);
+ log_pfn_register(p, "m", log_request_method, 0);
+ log_pfn_register(p, "q", log_request_query, 0);
+ log_pfn_register(p, "X", log_connection_status, 0);
+ log_pfn_register(p, "C", log_cookie, 0);
+ log_pfn_register(p, "r", log_request_line, 1);
+ log_pfn_register(p, "D", log_request_duration_microseconds, 1);
+ log_pfn_register(p, "T", log_request_duration, 1);
+ log_pfn_register(p, "U", log_request_uri, 1);
+ log_pfn_register(p, "s", log_status, 1);
+ }
+
+ return OK;
+}
+
+static void register_hooks(apr_pool_t *p)
+{
+ ap_hook_pre_config(log_pre_config,NULL,NULL,APR_HOOK_REALLY_FIRST);
+ ap_hook_child_init(init_child,NULL,NULL,APR_HOOK_MIDDLE);
+ ap_hook_open_logs(init_config_log,NULL,NULL,APR_HOOK_MIDDLE);
+ ap_hook_log_transaction(multi_log_transaction,NULL,NULL,APR_HOOK_MIDDLE);
+
+ /* Init log_hash before we register the optional function. It is
+ * possible for the optional function, ap_register_log_handler,
+ * to be called before any other mod_log_config hooks are called.
+ * As a policy, we should init everything required by an optional function
+ * before calling APR_REGISTER_OPTIONAL_FN.
+ */
+ log_hash = apr_hash_make(p);
+ APR_REGISTER_OPTIONAL_FN(ap_register_log_handler);
+ APR_REGISTER_OPTIONAL_FN(ap_log_set_writer_init);
+ APR_REGISTER_OPTIONAL_FN(ap_log_set_writer);
+}
+
+module AP_MODULE_DECLARE_DATA log_config_module =
+{
+ STANDARD20_MODULE_STUFF,
+ NULL, /* create per-dir config */
+ NULL, /* merge per-dir config */
+ make_config_log_state, /* server config */
+ merge_config_log_state, /* merge server config */
+ config_log_cmds, /* command apr_table_t */
+ register_hooks /* register hooks */
+};
+