1 /* Licensed to the Apache Software Foundation (ASF) under one or more
2 * contributor license agreements. See the NOTICE file distributed with
3 * this work for additional information regarding copyright ownership.
4 * The ASF licenses this file to You under the Apache License, Version 2.0
5 * (the "License"); you may not use this file except in compliance with
6 * the License. You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
19 * @brief Apache Logging library
21 * @defgroup APACHE_CORE_LOG Logging library
22 * @ingroup APACHE_CORE
26 #ifndef APACHE_HTTP_LOG_H
27 #define APACHE_HTTP_LOG_H
33 #include "apr_thread_proc.h"
38 #include "http_config.h"
44 #define APLOG_EMERG LOG_EMERG /* system is unusable */
45 #define APLOG_ALERT LOG_ALERT /* action must be taken immediately */
46 #define APLOG_CRIT LOG_CRIT /* critical conditions */
47 #define APLOG_ERR LOG_ERR /* error conditions */
48 #define APLOG_WARNING LOG_WARNING /* warning conditions */
49 #define APLOG_NOTICE LOG_NOTICE /* normal but significant condition */
50 #define APLOG_INFO LOG_INFO /* informational */
51 #define APLOG_DEBUG LOG_DEBUG /* debug-level messages */
52 #define APLOG_TRACE1 (LOG_DEBUG + 1) /* trace-level 1 messages */
53 #define APLOG_TRACE2 (LOG_DEBUG + 2) /* trace-level 2 messages */
54 #define APLOG_TRACE3 (LOG_DEBUG + 3) /* trace-level 3 messages */
55 #define APLOG_TRACE4 (LOG_DEBUG + 4) /* trace-level 4 messages */
56 #define APLOG_TRACE5 (LOG_DEBUG + 5) /* trace-level 5 messages */
57 #define APLOG_TRACE6 (LOG_DEBUG + 6) /* trace-level 6 messages */
58 #define APLOG_TRACE7 (LOG_DEBUG + 7) /* trace-level 7 messages */
59 #define APLOG_TRACE8 (LOG_DEBUG + 8) /* trace-level 8 messages */
61 #define APLOG_LEVELMASK 15 /* mask off the level value */
65 #define APLOG_EMERG 0 /* system is unusable */
66 #define APLOG_ALERT 1 /* action must be taken immediately */
67 #define APLOG_CRIT 2 /* critical conditions */
68 #define APLOG_ERR 3 /* error conditions */
69 #define APLOG_WARNING 4 /* warning conditions */
70 #define APLOG_NOTICE 5 /* normal but significant condition */
71 #define APLOG_INFO 6 /* informational */
72 #define APLOG_DEBUG 7 /* debug-level messages */
73 #define APLOG_TRACE1 8 /* trace-level 1 messages */
74 #define APLOG_TRACE2 9 /* trace-level 2 messages */
75 #define APLOG_TRACE3 10 /* trace-level 3 messages */
76 #define APLOG_TRACE4 11 /* trace-level 4 messages */
77 #define APLOG_TRACE5 12 /* trace-level 5 messages */
78 #define APLOG_TRACE6 13 /* trace-level 6 messages */
79 #define APLOG_TRACE7 14 /* trace-level 7 messages */
80 #define APLOG_TRACE8 15 /* trace-level 8 messages */
82 #define APLOG_LEVELMASK 15 /* mask off the level value */
86 /* APLOG_NOERRNO is ignored and should not be used. It will be
87 * removed in a future release of Apache.
89 #define APLOG_NOERRNO (APLOG_LEVELMASK + 1)
91 /** Use APLOG_TOCLIENT on ap_log_rerror() to give content
92 * handlers the option of including the error text in the
93 * ErrorDocument sent back to the client. Setting APLOG_TOCLIENT
94 * will cause the error text to be saved in the request_rec->notes
95 * table, keyed to the string "error-notes", if and only if:
96 * - the severity level of the message is APLOG_WARNING or greater
97 * - there are no other "error-notes" set in request_rec->notes
98 * Once error-notes is set, it is up to the content handler to
99 * determine whether this text should be sent back to the client.
100 * Note: Client generated text streams sent back to the client MUST
101 * be escaped to prevent CSS attacks.
103 #define APLOG_TOCLIENT ((APLOG_LEVELMASK + 1) * 2)
105 /* normal but significant condition on startup, usually printed to stderr */
106 #define APLOG_STARTUP ((APLOG_LEVELMASK + 1) * 4)
108 #ifndef DEFAULT_LOGLEVEL
109 #define DEFAULT_LOGLEVEL APLOG_WARNING
113 * APLOG_NO_MODULE may be passed as module_index to ap_log_error() and related
114 * functions if the module causing the log message is not known. Normally this
115 * should not be used directly. Use ::APLOG_MARK or ::APLOG_MODULE_INDEX
119 * @see APLOG_MODULE_INDEX
122 #define APLOG_NO_MODULE -1
125 * Constant to store module_index for the current file.
126 * Objects with static storage duration are set to NULL if not
127 * initialized explicitly. This means that if aplog_module_index
128 * is not initalized using the ::APLOG_USE_MODULE or the
129 * ::AP_DECLARE_MODULE macro, we can safely fall back to
130 * use ::APLOG_NO_MODULE. This variable will usually be optimized away.
132 static int * const aplog_module_index;
135 * APLOG_MODULE_INDEX contains the module_index of the current module if
136 * it has been set via the ::APLOG_USE_MODULE or ::AP_DECLARE_MODULE macro.
137 * Otherwise it contains ::APLOG_NO_MODULE (for example in unmodified httpd
140 * If ::APLOG_MARK is used in ap_log_error() and related functions,
141 * ::APLOG_MODULE_INDEX will be passed as module_index. In cases where
142 * ::APLOG_MARK cannot be used, ::APLOG_MODULE_INDEX should normally be passed
148 #define APLOG_MODULE_INDEX \
149 (aplog_module_index ? *aplog_module_index : APLOG_NO_MODULE)
152 * APLOG_MAX_LOGLEVEL can be defined to remove logging above some
153 * specified level at compile time.
155 * This requires a C99 compiler.
158 #define APLOG_MAX_LOGLEVEL
160 #ifndef APLOG_MAX_LOGLEVEL
161 #define APLOG_MODULE_IS_LEVEL(s,module_index,level) \
162 ( (((level)&APLOG_LEVELMASK) <= APLOG_NOTICE) || \
164 (ap_get_server_module_loglevel(s, module_index) \
165 >= ((level)&APLOG_LEVELMASK) ) )
166 #define APLOG_C_MODULE_IS_LEVEL(c,module_index,level) \
167 ( (((level)&APLOG_LEVELMASK) <= APLOG_NOTICE) || \
168 (ap_get_conn_module_loglevel(c, module_index) \
169 >= ((level)&APLOG_LEVELMASK) ) )
170 #define APLOG_CS_MODULE_IS_LEVEL(c,s,module_index,level) \
171 ( (((level)&APLOG_LEVELMASK) <= APLOG_NOTICE) || \
172 (ap_get_conn_server_module_loglevel(c, s, module_index) \
173 >= ((level)&APLOG_LEVELMASK) ) )
174 #define APLOG_R_MODULE_IS_LEVEL(r,module_index,level) \
175 ( (((level)&APLOG_LEVELMASK) <= APLOG_NOTICE) || \
176 (ap_get_request_module_loglevel(r, module_index) \
177 >= ((level)&APLOG_LEVELMASK) ) )
179 #define APLOG_MODULE_IS_LEVEL(s,module_index,level) \
180 ( (((level)&APLOG_LEVELMASK) <= APLOG_MAX_LOGLEVEL) && \
181 ( (((level)&APLOG_LEVELMASK) <= APLOG_NOTICE) || \
183 (ap_get_server_module_loglevel(s, module_index) \
184 >= ((level)&APLOG_LEVELMASK) ) ) )
185 #define APLOG_CS_MODULE_IS_LEVEL(c,s,module_index,level) \
186 ( (((level)&APLOG_LEVELMASK) <= APLOG_MAX_LOGLEVEL) && \
187 ( (((level)&APLOG_LEVELMASK) <= APLOG_NOTICE) || \
188 (ap_get_conn_server_module_loglevel(c, s, module_index) \
189 >= ((level)&APLOG_LEVELMASK) ) ) )
190 #define APLOG_C_MODULE_IS_LEVEL(c,module_index,level) \
191 ( (((level)&APLOG_LEVELMASK) <= APLOG_MAX_LOGLEVEL) && \
192 ( (((level)&APLOG_LEVELMASK) <= APLOG_NOTICE) || \
193 (ap_get_conn_module_loglevel(c, module_index) \
194 >= ((level)&APLOG_LEVELMASK) ) ) )
195 #define APLOG_R_MODULE_IS_LEVEL(r,module_index,level) \
196 ( (((level)&APLOG_LEVELMASK) <= APLOG_MAX_LOGLEVEL) && \
197 ( (((level)&APLOG_LEVELMASK) <= APLOG_NOTICE) || \
198 (ap_get_request_module_loglevel(r, module_index) \
199 >= ((level)&APLOG_LEVELMASK) ) ) )
202 #define APLOG_IS_LEVEL(s,level) \
203 APLOG_MODULE_IS_LEVEL(s,APLOG_MODULE_INDEX,level)
204 #define APLOG_C_IS_LEVEL(c,level) \
205 APLOG_C_MODULE_IS_LEVEL(c,APLOG_MODULE_INDEX,level)
206 #define APLOG_CS_IS_LEVEL(c,s,level) \
207 APLOG_CS_MODULE_IS_LEVEL(c,s,APLOG_MODULE_INDEX,level)
208 #define APLOG_R_IS_LEVEL(r,level) \
209 APLOG_R_MODULE_IS_LEVEL(r,APLOG_MODULE_INDEX,level)
212 #define APLOGinfo(s) APLOG_IS_LEVEL(s,APLOG_INFO)
213 #define APLOGdebug(s) APLOG_IS_LEVEL(s,APLOG_DEBUG)
214 #define APLOGtrace1(s) APLOG_IS_LEVEL(s,APLOG_TRACE1)
215 #define APLOGtrace2(s) APLOG_IS_LEVEL(s,APLOG_TRACE2)
216 #define APLOGtrace3(s) APLOG_IS_LEVEL(s,APLOG_TRACE3)
217 #define APLOGtrace4(s) APLOG_IS_LEVEL(s,APLOG_TRACE4)
218 #define APLOGtrace5(s) APLOG_IS_LEVEL(s,APLOG_TRACE5)
219 #define APLOGtrace6(s) APLOG_IS_LEVEL(s,APLOG_TRACE6)
220 #define APLOGtrace7(s) APLOG_IS_LEVEL(s,APLOG_TRACE7)
221 #define APLOGtrace8(s) APLOG_IS_LEVEL(s,APLOG_TRACE8)
223 #define APLOGrinfo(r) APLOG_R_IS_LEVEL(r,APLOG_INFO)
224 #define APLOGrdebug(r) APLOG_R_IS_LEVEL(r,APLOG_DEBUG)
225 #define APLOGrtrace1(r) APLOG_R_IS_LEVEL(r,APLOG_TRACE1)
226 #define APLOGrtrace2(r) APLOG_R_IS_LEVEL(r,APLOG_TRACE2)
227 #define APLOGrtrace3(r) APLOG_R_IS_LEVEL(r,APLOG_TRACE3)
228 #define APLOGrtrace4(r) APLOG_R_IS_LEVEL(r,APLOG_TRACE4)
229 #define APLOGrtrace5(r) APLOG_R_IS_LEVEL(r,APLOG_TRACE5)
230 #define APLOGrtrace6(r) APLOG_R_IS_LEVEL(r,APLOG_TRACE6)
231 #define APLOGrtrace7(r) APLOG_R_IS_LEVEL(r,APLOG_TRACE7)
232 #define APLOGrtrace8(r) APLOG_R_IS_LEVEL(r,APLOG_TRACE8)
234 #define APLOGcinfo(c) APLOG_C_IS_LEVEL(c,APLOG_INFO)
235 #define APLOGcdebug(c) APLOG_C_IS_LEVEL(c,APLOG_DEBUG)
236 #define APLOGctrace1(c) APLOG_C_IS_LEVEL(c,APLOG_TRACE1)
237 #define APLOGctrace2(c) APLOG_C_IS_LEVEL(c,APLOG_TRACE2)
238 #define APLOGctrace3(c) APLOG_C_IS_LEVEL(c,APLOG_TRACE3)
239 #define APLOGctrace4(c) APLOG_C_IS_LEVEL(c,APLOG_TRACE4)
240 #define APLOGctrace5(c) APLOG_C_IS_LEVEL(c,APLOG_TRACE5)
241 #define APLOGctrace6(c) APLOG_C_IS_LEVEL(c,APLOG_TRACE6)
242 #define APLOGctrace7(c) APLOG_C_IS_LEVEL(c,APLOG_TRACE7)
243 #define APLOGctrace8(c) APLOG_C_IS_LEVEL(c,APLOG_TRACE8)
245 extern int AP_DECLARE_DATA ap_default_loglevel;
248 * APLOG_MARK is a convenience macro for use as the first three parameters in
249 * ap_log_error() and related functions, i.e. file, line, and module_index.
251 * The module_index parameter was introduced in version 2.3.6. Before that
252 * version, APLOG_MARK only replaced the file and line parameters.
253 * This means that APLOG_MARK can be used with ap_log_*error in all versions
256 * @see APLOG_MODULE_INDEX
260 * @see ap_log_cserror
262 #define APLOG_MARK __FILE__,__LINE__,APLOG_MODULE_INDEX
265 * Set up for logging to stderr.
266 * @param p The pool to allocate out of
268 AP_DECLARE(void) ap_open_stderr_log(apr_pool_t *p);
271 * Replace logging to stderr with logging to the given file.
272 * @param p The pool to allocate out of
273 * @param file Name of the file to log stderr output
275 AP_DECLARE(apr_status_t) ap_replace_stderr_log(apr_pool_t *p,
279 * Open the error log and replace stderr with it.
280 * @param pconf Not used
281 * @param plog The pool to allocate the logs from
282 * @param ptemp Pool used for temporary allocations
283 * @param s_main The main server
284 * @note ap_open_logs isn't expected to be used by modules, it is
285 * an internal core function
287 int ap_open_logs(apr_pool_t *pconf, apr_pool_t *plog,
288 apr_pool_t *ptemp, server_rec *s_main);
291 * Perform special processing for piped loggers in MPM child
295 * @note ap_logs_child_init is not for use by modules; it is an
296 * internal core function
298 void ap_logs_child_init(apr_pool_t *p, server_rec *s);
301 * The primary logging functions, ap_log_error, ap_log_rerror, ap_log_cerror,
302 * and ap_log_perror use a printf style format string to build the log message.
303 * It is VERY IMPORTANT that you not include any raw data from the network,
304 * such as the request-URI or request header fields, within the format
305 * string. Doing so makes the server vulnerable to a denial-of-service
306 * attack and other messy behavior. Instead, use a simple format string
307 * like "%s", followed by the string containing the untrusted data.
311 * ap_log_error() - log messages which are not related to a particular
312 * request or connection. This uses a printf-like format to log messages
314 * @param file The file in which this function is called
315 * @param line The line number on which this function is called
316 * @param module_index The module_index of the module generating this message
317 * @param level The level of this error message
318 * @param status The status code from the previous command
319 * @param s The server on which we are logging
320 * @param fmt The format string
321 * @param ... The arguments to use to fill out fmt.
322 * @note ap_log_error is implemented as a macro
323 * @note Use APLOG_MARK to fill out file and line
324 * @note If a request_rec is available, use that with ap_log_rerror()
325 * in preference to calling this function. Otherwise, if a conn_rec is
326 * available, use that with ap_log_cerror() in preference to calling
328 * @warning It is VERY IMPORTANT that you not include any raw data from
329 * the network, such as the request-URI or request header fields, within
330 * the format string. Doing so makes the server vulnerable to a
331 * denial-of-service attack and other messy behavior. Instead, use a
332 * simple format string like "%s", followed by the string containing the
336 AP_DECLARE(void) ap_log_error(const char *file, int line, int module_index,
337 int level, apr_status_t status,
338 const server_rec *s, const char *fmt, ...);
340 #if __STDC_VERSION__ >= 199901L
341 /* need additional step to expand APLOG_MARK first */
342 #define ap_log_error(...) ap_log_error__(__VA_ARGS__)
343 /* need server_rec *sr = ... for the case if s is verbatim NULL */
344 #define ap_log_error__(file, line, mi, level, status, s, ...) \
345 do { const server_rec *sr = s; if (APLOG_MODULE_IS_LEVEL(sr, mi, level)) \
346 ap_log_error_(file, line, mi, level, status, sr, __VA_ARGS__); \
349 #define ap_log_error ap_log_error_
351 AP_DECLARE(void) ap_log_error_(const char *file, int line, int module_index,
352 int level, apr_status_t status,
353 const server_rec *s, const char *fmt, ...)
354 __attribute__((format(printf,7,8)));
358 * ap_log_perror() - log messages which are not related to a particular
359 * request, connection, or virtual server. This uses a printf-like
360 * format to log messages to the error_log.
361 * @param file The file in which this function is called
362 * @param line The line number on which this function is called
363 * @param module_index ignored dummy value for use by APLOG_MARK
364 * @param level The level of this error message
365 * @param status The status code from the previous command
366 * @param p The pool which we are logging for
367 * @param fmt The format string
368 * @param ... The arguments to use to fill out fmt.
369 * @note ap_log_perror is implemented as a macro
370 * @note Use APLOG_MARK to fill out file, line, and module_index
371 * @warning It is VERY IMPORTANT that you not include any raw data from
372 * the network, such as the request-URI or request header fields, within
373 * the format string. Doing so makes the server vulnerable to a
374 * denial-of-service attack and other messy behavior. Instead, use a
375 * simple format string like "%s", followed by the string containing the
379 AP_DECLARE(void) ap_log_perror(const char *file, int line, int module_index,
380 int level, apr_status_t status, apr_pool_t *p,
381 const char *fmt, ...);
383 #if __STDC_VERSION__ >= 199901L && defined(APLOG_MAX_LOGLEVEL)
384 /* need additional step to expand APLOG_MARK first */
385 #define ap_log_perror(...) ap_log_perror__(__VA_ARGS__)
386 #define ap_log_perror__(file, line, mi, level, status, p, ...) \
387 do { if ((level) <= APLOG_MAX_LOGLEVEL ) \
388 ap_log_perror_(file, line, mi, level, status, p, \
389 __VA_ARGS__); } while(0)
391 #define ap_log_perror ap_log_perror_
393 AP_DECLARE(void) ap_log_perror_(const char *file, int line, int module_index,
394 int level, apr_status_t status, apr_pool_t *p,
395 const char *fmt, ...)
396 __attribute__((format(printf,7,8)));
400 * ap_log_rerror() - log messages which are related to a particular
401 * request. This uses a printf-like format to log messages to the
403 * @param file The file in which this function is called
404 * @param line The line number on which this function is called
405 * @param module_index The module_index of the module generating this message
406 * @param level The level of this error message
407 * @param status The status code from the previous command
408 * @param r The request which we are logging for
409 * @param fmt The format string
410 * @param ... The arguments to use to fill out fmt.
411 * @note ap_log_rerror is implemented as a macro
412 * @note Use APLOG_MARK to fill out file, line, and module_index
413 * @warning It is VERY IMPORTANT that you not include any raw data from
414 * the network, such as the request-URI or request header fields, within
415 * the format string. Doing so makes the server vulnerable to a
416 * denial-of-service attack and other messy behavior. Instead, use a
417 * simple format string like "%s", followed by the string containing the
421 AP_DECLARE(void) ap_log_rerror(const char *file, int line, int module_index,
422 int level, apr_status_t status,
423 const request_rec *r, const char *fmt, ...);
425 #if __STDC_VERSION__ >= 199901L
426 /* need additional step to expand APLOG_MARK first */
427 #define ap_log_rerror(...) ap_log_rerror__(__VA_ARGS__)
428 #define ap_log_rerror__(file, line, mi, level, status, r, ...) \
429 do { if (APLOG_R_MODULE_IS_LEVEL(r, mi, level)) \
430 ap_log_rerror_(file, line, mi, level, status, r, __VA_ARGS__); \
433 #define ap_log_rerror ap_log_rerror_
435 AP_DECLARE(void) ap_log_rerror_(const char *file, int line, int module_index,
436 int level, apr_status_t status,
437 const request_rec *r, const char *fmt, ...)
438 __attribute__((format(printf,7,8)));
442 * ap_log_cerror() - log messages which are related to a particular
443 * connection. This uses a printf-like format to log messages to the
445 * @param file The file in which this function is called
446 * @param line The line number on which this function is called
447 * @param level The level of this error message
448 * @param module_index The module_index of the module generating this message
449 * @param status The status code from the previous command
450 * @param c The connection which we are logging for
451 * @param fmt The format string
452 * @param ... The arguments to use to fill out fmt.
453 * @note ap_log_cerror is implemented as a macro
454 * @note Use APLOG_MARK to fill out file, line, and module_index
455 * @note If a request_rec is available, use that with ap_log_rerror()
456 * in preference to calling this function.
457 * @warning It is VERY IMPORTANT that you not include any raw data from
458 * the network, such as the request-URI or request header fields, within
459 * the format string. Doing so makes the server vulnerable to a
460 * denial-of-service attack and other messy behavior. Instead, use a
461 * simple format string like "%s", followed by the string containing the
465 AP_DECLARE(void) ap_log_cerror(const char *file, int line, int module_index,
466 int level, apr_status_t status,
467 const conn_rec *c, const char *fmt, ...);
469 #if __STDC_VERSION__ >= 199901L
470 /* need additional step to expand APLOG_MARK first */
471 #define ap_log_cerror(...) ap_log_cerror__(__VA_ARGS__)
472 #define ap_log_cerror__(file, line, mi, level, status, c, ...) \
473 do { if (APLOG_C_MODULE_IS_LEVEL(c, mi, level)) \
474 ap_log_cerror_(file, line, mi, level, status, c, __VA_ARGS__); \
477 #define ap_log_cerror ap_log_cerror_
479 AP_DECLARE(void) ap_log_cerror_(const char *file, int line, int module_index,
480 int level, apr_status_t status,
481 const conn_rec *c, const char *fmt, ...)
482 __attribute__((format(printf,7,8)));
486 * ap_log_cserror() - log messages which are related to a particular
487 * connection and to a vhost other than c->base_server. This uses a
488 * printf-like format to log messages to the error_log.
489 * @param file The file in which this function is called
490 * @param line The line number on which this function is called
491 * @param level The level of this error message
492 * @param module_index The module_index of the module generating this message
493 * @param status The status code from the previous command
494 * @param c The connection which we are logging for
495 * @param s The server which we are logging for
496 * @param fmt The format string
497 * @param ... The arguments to use to fill out fmt.
498 * @note ap_log_cserror is implemented as a macro
499 * @note Use APLOG_MARK to fill out file, line, and module_index
500 * @note If a request_rec is available, use that with ap_log_rerror()
501 * in preference to calling this function. This function is mainly useful for
502 * modules like mod_ssl to use before the request_rec is created.
503 * @warning It is VERY IMPORTANT that you not include any raw data from
504 * the network, such as the request-URI or request header fields, within
505 * the format string. Doing so makes the server vulnerable to a
506 * denial-of-service attack and other messy behavior. Instead, use a
507 * simple format string like "%s", followed by the string containing the
511 AP_DECLARE(void) ap_log_cserror(const char *file, int line, int module_index,
512 int level, apr_status_t status,
513 const conn_rec *c, const server_rec *s,
514 const char *fmt, ...);
516 #if __STDC_VERSION__ >= 199901L
517 /* need additional step to expand APLOG_MARK first */
518 #define ap_log_cserror(...) ap_log_cserror__(__VA_ARGS__)
519 #define ap_log_cserror__(file, line, mi, level, status, c, s, ...) \
520 do { if (APLOG_CS_MODULE_IS_LEVEL(c, s, mi, level)) \
521 ap_log_cserror_(file, line, mi, level, status, c, s, \
525 #define ap_log_cserror ap_log_cserror_
527 AP_DECLARE(void) ap_log_cserror_(const char *file, int line, int module_index,
528 int level, apr_status_t status,
529 const conn_rec *c, const server_rec *s,
530 const char *fmt, ...)
531 __attribute__((format(printf,8,9)));
535 * Convert stderr to the error log
536 * @param s The current server
538 AP_DECLARE(void) ap_error_log2stderr(server_rec *s);
541 * Log the command line used to start the server.
542 * @param p The pool to use for logging
543 * @param s The server_rec whose process's command line we want to log.
544 * The command line is logged to that server's error log.
546 AP_DECLARE(void) ap_log_command_line(apr_pool_t *p, server_rec *s);
549 * Log the current pid of the parent process
550 * @param p The pool to use for logging
551 * @param fname The name of the file to log to
553 AP_DECLARE(void) ap_log_pid(apr_pool_t *p, const char *fname);
556 * Retrieve the pid from a pidfile.
557 * @param p The pool to use for logging
558 * @param filename The name of the file containing the pid
559 * @param mypid Pointer to pid_t (valid only if return APR_SUCCESS)
561 AP_DECLARE(apr_status_t) ap_read_pid(apr_pool_t *p, const char *filename, pid_t *mypid);
563 /** @see piped_log */
564 typedef struct piped_log piped_log;
567 * Open the piped log process
568 * @param p The pool to allocate out of
569 * @param program The program to run in the logging process
570 * @return The piped log structure
571 * @note The log program is invoked as @p APR_PROGRAM_ENV,
572 * @see ap_open_piped_log_ex to modify this behavior
574 AP_DECLARE(piped_log *) ap_open_piped_log(apr_pool_t *p, const char *program);
577 * Open the piped log process specifying the execution choice for program
578 * @param p The pool to allocate out of
579 * @param program The program to run in the logging process
580 * @param cmdtype How to invoke program, e.g. APR_PROGRAM, APR_SHELLCMD_ENV, etc
581 * @return The piped log structure
583 AP_DECLARE(piped_log *) ap_open_piped_log_ex(apr_pool_t *p,
585 apr_cmdtype_e cmdtype);
588 * Close the piped log and kill the logging process
589 * @param pl The piped log structure
591 AP_DECLARE(void) ap_close_piped_log(piped_log *pl);
594 * A function to return the read side of the piped log pipe
595 * @param pl The piped log structure
596 * @return The native file descriptor
598 AP_DECLARE(apr_file_t *) ap_piped_log_read_fd(piped_log *pl);
601 * A function to return the write side of the piped log pipe
602 * @param pl The piped log structure
603 * @return The native file descriptor
605 AP_DECLARE(apr_file_t *) ap_piped_log_write_fd(piped_log *pl);
608 * hook method to log error messages
610 * @param file The file in which this function is called
611 * @param line The line number on which this function is called
612 * @param module_index The module_index of the module generating this message
613 * @param level The level of this error message
614 * @param status The status code from the previous command
615 * @param s The server which we are logging for
616 * @param r The request which we are logging for
617 * @param pool Memory pool to allocate from
618 * @param errstr message to log
620 AP_DECLARE_HOOK(void, error_log, (const char *file, int line,
621 int module_index, int level,
622 apr_status_t status, const server_rec *s,
623 const request_rec *r, apr_pool_t *pool,
627 * hook method to generate unique id for connection or request
629 * @param c the conn_rec of the connections
630 * @param r the request_req (may be NULL)
631 * @param id the place where to store the unique id
632 * @return OK or DECLINE
634 AP_DECLARE_HOOK(int, generate_log_id,
635 (const conn_rec *c, const request_rec *r, const char **id))
642 #endif /* !APACHE_HTTP_LOG_H */