text: /* 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.
   */
  
  #ifndef APACHE_HTTP_LOG_H
  #define APACHE_HTTP_LOG_H
  
  #ifdef __cplusplus
  extern "C" {
  #endif
  
  #ifdef HAVE_SYSLOG
  #include <syslog.h>
  
  #define APLOG_EMERG     LOG_EMERG     /* system is unusable */
  #define APLOG_ALERT     LOG_ALERT     /* action must be taken immediately */
  #define APLOG_CRIT      LOG_CRIT      /* critical conditions */
  #define APLOG_ERR       LOG_ERR       /* error conditions */
  #define APLOG_WARNING   LOG_WARNING   /* warning conditions */
  #define APLOG_NOTICE    LOG_NOTICE    /* normal but significant condition */
  #define APLOG_INFO      LOG_INFO      /* informational */
  #define APLOG_DEBUG     LOG_DEBUG     /* debug-level messages */
  
  #define APLOG_LEVELMASK LOG_PRIMASK   /* mask off the level value */
  
  #else
  
  #define	APLOG_EMERG	0	/* system is unusable */
  #define	APLOG_ALERT	1	/* action must be taken immediately */
  #define	APLOG_CRIT	2	/* critical conditions */
  #define	APLOG_ERR	3	/* error conditions */
  #define	APLOG_WARNING	4	/* warning conditions */
  #define	APLOG_NOTICE	5	/* normal but significant condition */
  #define	APLOG_INFO	6	/* informational */
  #define	APLOG_DEBUG	7	/* debug-level messages */
  
  #define	APLOG_LEVELMASK	7	/* mask off the level value */
  
  #endif
  
  #define APLOG_NOERRNO		(APLOG_LEVELMASK + 1)
  #ifdef WIN32
  /* Set to indicate that error msg should come from Win32's GetLastError(),
   * not errno. */
  #define APLOG_WIN32ERROR	((APLOG_LEVELMASK+1) * 2)
  #endif
  
  #ifndef DEFAULT_LOGLEVEL
  #define DEFAULT_LOGLEVEL	APLOG_WARNING
  #endif
  
  #define APLOG_MARK	__FILE__,__LINE__
  
  API_EXPORT(void) ap_open_logs (server_rec *, pool *p);
  
  /* The two primary logging functions, ap_log_error and ap_log_rerror,
   * use a printf style format string to build the log message.  It is
   * VERY IMPORTANT that you not include any raw data from the network,
   * such as the request-URI or request header fields, within the format
   * string.  Doing so makes the server vulnerable to a denial-of-service
   * attack and other messy behavior.  Instead, use a simple format string
   * like "%s", followed by the string containing the untrusted data.
   */
  API_EXPORT_NONSTD(void) ap_log_error(const char *file, int line, int level,
  			     const server_rec *s, const char *fmt, ...)
  			    __attribute__((format(printf,5,6)));
  API_EXPORT_NONSTD(void) ap_log_rerror(const char *file, int line, int level,
  			     const request_rec *s, const char *fmt, ...)
  			    __attribute__((format(printf,5,6)));
  API_EXPORT(void) ap_error_log2stderr (server_rec *);     
  
  API_EXPORT(void) ap_log_pid (pool *p, char *fname);
  /* These are for legacy code, new code should use ap_log_error,
   * or ap_log_rerror.
   */
  API_EXPORT(void) ap_log_error_old(const char *err, server_rec *s);
  API_EXPORT(void) ap_log_unixerr(const char *routine, const char *file,
  			     const char *msg, server_rec *s);
  API_EXPORT_NONSTD(void) ap_log_printf(const server_rec *s, const char *fmt, ...)
  			    __attribute__((format(printf,2,3)));
  API_EXPORT(void) ap_log_reason(const char *reason, const char *fname,
  			    request_rec *r);
  
  typedef struct piped_log {
      pool *p;
  #if !defined(NO_RELIABLE_PIPED_LOGS) || defined(TPF)
      char *program;
      int pid;
      int fds[2];
  #else
      FILE *write_f;
  #endif
  } piped_log;
  
  API_EXPORT(piped_log *) ap_open_piped_log (pool *p, const char *program);
  API_EXPORT(void) ap_close_piped_log (piped_log *);
  #if !defined(NO_RELIABLE_PIPED_LOGS) || defined(TPF)
  #define ap_piped_log_read_fd(pl)	((pl)->fds[0])
  #define ap_piped_log_write_fd(pl)	((pl)->fds[1])
  #else
  #define ap_piped_log_read_fd(pl)	(-1)
  #define ap_piped_log_write_fd(pl)	(fileno((pl)->write_f))
  #endif
  
  #ifdef __cplusplus
  }
  #endif
  
  #endif	/* !APACHE_HTTP_LOG_H */
  