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/* ====================================================================
* The Apache Software License, Version 1.1
*
* Copyright (c) 2000-2003 The Apache Software Foundation. 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. The end-user documentation included with the redistribution,
* if any, must include the following acknowledgment:
* "This product includes software developed by the
* Apache Software Foundation (http://www.apache.org/)."
* Alternately, this acknowledgment may appear in the software itself,
* if and wherever such third-party acknowledgments normally appear.
*
* 4. The names "Apache" and "Apache Software Foundation" 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. Products derived from this software may not be called "Apache",
* nor may "Apache" appear in their name, without prior written
* permission of the Apache Software Foundation.
*
* THIS SOFTWARE IS PROVIDED ``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 SOFTWARE FOUNDATION 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 Software Foundation. For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*
* Portions of this software are based upon public domain software
* originally written at the National Center for Supercomputing Applications,
* University of Illinois, Urbana-Champaign.
*/
#ifndef APACHE_HTTP_LOG_H
#define APACHE_HTTP_LOG_H
#ifdef __cplusplus
extern "C" {
#endif
#include "apr_thread_proc.h"
/**
* @package Apache logging library
*/
#ifdef HAVE_SYSLOG
#include <syslog.h>
#ifndef LOG_PRIMASK
#define LOG_PRIMASK 7
#endif
#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
/* APLOG_NOERRNO is ignored and should not be used. It will be
* removed in a future release of Apache.
*/
#define APLOG_NOERRNO (APLOG_LEVELMASK + 1)
/* Use APLOG_TOCLIENT on ap_log_rerror() to give content
* handlers the option of including the error text in the
* ErrorDocument sent back to the client. Setting APLOG_TOCLIENT
* will cause the error text to be saved in the request_rec->notes
* table, keyed to the string "error-notes", if and only if:
* - the severity level of the message is APLOG_WARNING or greater
* - there are no other "error-notes" set in request_rec->notes
* Once error-notes is set, it is up to the content handler to
* determine whether this text should be sent back to the client.
* Note: Client generated text streams sent back to the client MUST
* be escaped to prevent CSS attacks.
*/
#define APLOG_TOCLIENT ((APLOG_LEVELMASK + 1) * 2)
/* normal but significant condition on startup, usually printed to stderr */
#define APLOG_STARTUP ((APLOG_LEVELMASK + 1) * 4)
#ifndef DEFAULT_LOGLEVEL
#define DEFAULT_LOGLEVEL APLOG_WARNING
#endif
extern int AP_DECLARE_DATA ap_default_loglevel;
#define APLOG_MARK __FILE__,__LINE__
/**
* Set up for logging to stderr.
* @param p The pool to allocate out of
*/
AP_DECLARE(void) ap_open_stderr_log(apr_pool_t *p);
/**
* Replace logging to stderr with logging to the given file.
* @param p The pool to allocate out of
* @param file Name of the file to log stderr output
*/
AP_DECLARE(apr_status_t) ap_replace_stderr_log(apr_pool_t *p,
const char *file);
/**
* Open the error log and replace stderr with it.
* @param pconf Not used
* @param plog The pool to allocate the logs from
* @param ptemp Pool used for temporary allocations
* @param s_main The main server
* @tip ap_open_logs isn't expected to be used by modules, it is
* an internal core function
*/
int ap_open_logs(apr_pool_t *pconf, apr_pool_t *plog,
apr_pool_t *ptemp, server_rec *s_main);
/*
* The three primary logging functions, ap_log_error, ap_log_rerror, and
* ap_log_perror 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.
*/
/**
* One of the primary logging routines in Apache. This uses a printf-like
* format to log messages to the error_log.
* @param file The file in which this function is called
* @param line The line number on which this function is called
* @param level The level of this error message
* @param status The status code from the previous command
* @param s The server on which we are logging
* @param fmt The format string
* @param ... The arguments to use to fill out fmt.
* @tip Use APLOG_MARK to fill out file and line
* @warning 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.
* @deffunc void ap_log_error(const char *file, int line, int level, apr_status_t status, const server_rec *s, const char *fmt, ...)
*/
AP_DECLARE(void) ap_log_error(const char *file, int line, int level,
apr_status_t status, const server_rec *s,
const char *fmt, ...)
__attribute__((format(printf,6,7)));
/**
* The second of the primary logging routines in Apache. This uses
* a printf-like format to log messages to the error_log.
* @param file The file in which this function is called
* @param line The line number on which this function is called
* @param level The level of this error message
* @param status The status code from the previous command
* @param p The pool which we are logging for
* @param fmt The format string
* @param ... The arguments to use to fill out fmt.
* @tip Use APLOG_MARK to fill out file and line
* @warning 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.
* @deffunc void ap_log_perror(const char *file, int line, int level, apr_status_t status, apr_pool_t *p, const char *fmt, ...)
*/
AP_DECLARE(void) ap_log_perror(const char *file, int line, int level,
apr_status_t status, apr_pool_t *p,
const char *fmt, ...)
__attribute__((format(printf,6,7)));
/**
* The last of the primary logging routines in Apache. This uses
* a printf-like format to log messages to the error_log.
* @param file The file in which this function is called
* @param line The line number on which this function is called
* @param level The level of this error message
* @param status The status code from the previous command
* @param s The request which we are logging for
* @param fmt The format string
* @param ... The arguments to use to fill out fmt.
* @tip Use APLOG_MARK to fill out file and line
* @warning 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.
* @deffunc void ap_log_rerror(const char *file, int line, int level, apr_status_t status, request_rec *r, const char *fmt, ...)
*/
AP_DECLARE(void) ap_log_rerror(const char *file, int line, int level,
apr_status_t status, const request_rec *r,
const char *fmt, ...)
__attribute__((format(printf,6,7)));
/**
* Convert stderr to the error log
* @param s The current server
* @deffunc void ap_error_log2stderr(server_rec *s)
*/
AP_DECLARE(void) ap_error_log2stderr(server_rec *s);
/**
* Log the current pid of the parent process
* @param p The pool to use for logging
* @param fname The name of the file to log to
*/
AP_DECLARE(void) ap_log_pid(apr_pool_t *p, const char *fname);
/**
* Retrieve the pid from a pidfile.
* @param p The pool to use for logging
* @param filename The name of the file containing the pid
* @param mypid Pointer to pid_t (valid only if return APR_SUCCESS)
*/
AP_DECLARE(apr_status_t) ap_read_pid(apr_pool_t *p, const char *filename, pid_t *mypid);
typedef struct piped_log piped_log;
/**
* The piped logging structure. Piped logs are used to move functionality
* out of the main server. For example, log rotation is done with piped logs.
*/
struct piped_log {
/** The pool to use for the piped log */
apr_pool_t *p;
/** The pipe between the server and the logging process */
apr_file_t *fds[2];
/* XXX - an #ifdef that needs to be eliminated from public view. Shouldn't
* be hard */
#ifdef AP_HAVE_RELIABLE_PIPED_LOGS
/** The name of the program the logging process is running */
char *program;
/** The pid of the logging process */
apr_proc_t *pid;
#endif
};
/**
* Open the piped log process
* @param p The pool to allocate out of
* @param program The program to run in the logging process
* @return The piped log structure
* @deffunc piped_log *ap_open_piped_log(apr_pool_t *p, const char *program)
*/
AP_DECLARE(piped_log *) ap_open_piped_log(apr_pool_t *p, const char *program);
/**
* Close the piped log and kill the logging process
* @param pl The piped log structure
* @deffunc void ap_close_piped_log(piped_log *pl)
*/
AP_DECLARE(void) ap_close_piped_log(piped_log *pl);
/**
* A macro to access the read side of the piped log pipe
* @param pl The piped log structure
* @return The native file descriptor
* @deffunc ap_piped_log_read_fd(pl)
*/
#define ap_piped_log_read_fd(pl) ((pl)->fds[0])
/**
* A macro to access the write side of the piped log pipe
* @param pl The piped log structure
* @return The native file descriptor
* @deffunc ap_piped_log_read_fd(pl)
*/
#define ap_piped_log_write_fd(pl) ((pl)->fds[1])
AP_DECLARE_HOOK(void, error_log, (const char *file, int line, int level,
apr_status_t status, const server_rec *s,
const request_rec *r, apr_pool_t *pool,
const char *errstr))
#ifdef __cplusplus
}
#endif
#endif /* !APACHE_HTTP_LOG_H */
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