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view src/core/ngx_log.h @ 196:8759b346e431 NGINX_0_3_45

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nginx 0.3.45 *) Feature: the "ssl_verify_client", "ssl_verify_depth", and "ssl_client_certificate" directives. *) Change: the $request_method variable now returns the main request method. *) Change: the ° symbol codes were changed in koi-win conversion table. *) Feature: the euro и N symbols were added to koi-win conversion table. *) Bugfix: if nginx distributed the requests among several backends and some backend failed, then requests intended for this backend was directed to one live backend only instead of being distributed among the rest.
author Igor Sysoev <http://sysoev.ru>
date Sat, 06 May 2006 00:00:00 +0400
parents 003bd800ec2a
children 6ae1357b7b7c
line wrap: on
line source


/*
 * Copyright (C) Igor Sysoev
 */


#ifndef _NGX_LOG_H_INCLUDED_
#define _NGX_LOG_H_INCLUDED_


#include <ngx_config.h>
#include <ngx_core.h>


#define NGX_LOG_STDERR            0
#define NGX_LOG_EMERG             1
#define NGX_LOG_ALERT             2
#define NGX_LOG_CRIT              3
#define NGX_LOG_ERR               4
#define NGX_LOG_WARN              5
#define NGX_LOG_NOTICE            6
#define NGX_LOG_INFO              7
#define NGX_LOG_DEBUG             8

#define NGX_LOG_DEBUG_CORE        0x010
#define NGX_LOG_DEBUG_ALLOC       0x020
#define NGX_LOG_DEBUG_MUTEX       0x040
#define NGX_LOG_DEBUG_EVENT       0x080
#define NGX_LOG_DEBUG_HTTP        0x100
#define NGX_LOG_DEBUG_IMAP        0x200
#define NGX_LOG_DEBUG_MYSQL       0x400

/*
 * do not forget to update debug_levels[] in src/core/ngx_log.c
 * after the adding a new debug level
 */

#define NGX_LOG_DEBUG_FIRST       NGX_LOG_DEBUG_CORE
#define NGX_LOG_DEBUG_LAST        NGX_LOG_DEBUG_IMAP
#define NGX_LOG_DEBUG_CONNECTION  0x80000000
#define NGX_LOG_DEBUG_ALL         0x7ffffff0


typedef u_char *(*ngx_log_handler_pt) (ngx_log_t *log, u_char *buf, size_t len);


struct ngx_log_s {
    ngx_uint_t           log_level;
    ngx_open_file_t     *file;

    ngx_atomic_uint_t    connection;

    ngx_log_handler_pt   handler;
    void                *data;

    /*
     * we declare "action" as "char *" because the actions are usually
     * the static strings and in the "u_char *" case we have to override
     * their types all the time
     */

    char                *action;
};


#define NGX_MAX_ERROR_STR   2048


/*********************************/

#if (NGX_HAVE_GCC_VARIADIC_MACROS)

#define NGX_HAVE_VARIADIC_MACROS  1

#define ngx_log_error(level, log, args...)                                    \
    if ((log)->log_level >= level) ngx_log_error_core(level, log, args)

void ngx_log_error_core(ngx_uint_t level, ngx_log_t *log, ngx_err_t err,
    const char *fmt, ...);

#define ngx_log_debug(level, log, args...)                                    \
    if ((log)->log_level & level)                                             \
        ngx_log_error_core(NGX_LOG_DEBUG, log, args)

/*********************************/

#elif (NGX_HAVE_C99_VARIADIC_MACROS)

#define NGX_HAVE_VARIADIC_MACROS  1

#define ngx_log_error(level, log, ...)                                        \
    if ((log)->log_level >= level) ngx_log_error_core(level, log, __VA_ARGS__)

void ngx_log_error_core(ngx_uint_t level, ngx_log_t *log, ngx_err_t err,
    const char *fmt, ...);

#define ngx_log_debug(level, log, ...)                                        \
    if ((log)->log_level & level)                                             \
        ngx_log_error_core(NGX_LOG_DEBUG, log, __VA_ARGS__)

/*********************************/

#else /* NO VARIADIC MACROS */

#define NGX_HAVE_VARIADIC_MACROS  0

void ngx_cdecl ngx_log_error(ngx_uint_t level, ngx_log_t *log, ngx_err_t err,
    const char *fmt, ...);
void ngx_log_error_core(ngx_uint_t level, ngx_log_t *log, ngx_err_t err,
    const char *fmt, va_list args);
void ngx_cdecl ngx_log_debug_core(ngx_log_t *log, ngx_err_t err,
    const char *fmt, ...);


#endif /* VARIADIC MACROS */


/*********************************/

#if (NGX_DEBUG)

#if (NGX_HAVE_VARIADIC_MACROS)

#define ngx_log_debug0  ngx_log_debug
#define ngx_log_debug1  ngx_log_debug
#define ngx_log_debug2  ngx_log_debug
#define ngx_log_debug3  ngx_log_debug
#define ngx_log_debug4  ngx_log_debug
#define ngx_log_debug5  ngx_log_debug
#define ngx_log_debug6  ngx_log_debug
#define ngx_log_debug7  ngx_log_debug
#define ngx_log_debug8  ngx_log_debug


#else /* NO VARIADIC MACROS */

#define ngx_log_debug0(level, log, err, fmt)                                  \
    if ((log)->log_level & level)                                             \
        ngx_log_debug_core(log, err, fmt)

#define ngx_log_debug1(level, log, err, fmt, arg1)                            \
    if ((log)->log_level & level)                                             \
        ngx_log_debug_core(log, err, fmt, arg1)

#define ngx_log_debug2(level, log, err, fmt, arg1, arg2)                      \
    if ((log)->log_level & level)                                             \
        ngx_log_debug_core(log, err, fmt, arg1, arg2)

#define ngx_log_debug3(level, log, err, fmt, arg1, arg2, arg3)                \
    if ((log)->log_level & level)                                             \
        ngx_log_debug_core(log, err, fmt, arg1, arg2, arg3)

#define ngx_log_debug4(level, log, err, fmt, arg1, arg2, arg3, arg4)          \
    if ((log)->log_level & level)                                             \
        ngx_log_debug_core(log, err, fmt, arg1, arg2, arg3, arg4)

#define ngx_log_debug5(level, log, err, fmt, arg1, arg2, arg3, arg4, arg5)    \
    if ((log)->log_level & level)                                             \
        ngx_log_debug_core(log, err, fmt, arg1, arg2, arg3, arg4, arg5)

#define ngx_log_debug6(level, log, err, fmt,                                  \
                       arg1, arg2, arg3, arg4, arg5, arg6)                    \
    if ((log)->log_level & level)                                             \
        ngx_log_debug_core(log, err, fmt, arg1, arg2, arg3, arg4, arg5, arg6)

#define ngx_log_debug7(level, log, err, fmt,                                  \
                       arg1, arg2, arg3, arg4, arg5, arg6, arg7)              \
    if ((log)->log_level & level)                                             \
        ngx_log_debug_core(log, err, fmt,                                     \
                       arg1, arg2, arg3, arg4, arg5, arg6, arg7)

#define ngx_log_debug8(level, log, err, fmt,                                  \
                       arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8)        \
    if ((log)->log_level & level)                                             \
        ngx_log_debug_core(log, err, fmt,                                     \
                       arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8)

#endif

#else /* NO NGX_DEBUG */

#define ngx_log_debug0(level, log, err, fmt)
#define ngx_log_debug1(level, log, err, fmt, arg1)
#define ngx_log_debug2(level, log, err, fmt, arg1, arg2)
#define ngx_log_debug3(level, log, err, fmt, arg1, arg2, arg3)
#define ngx_log_debug4(level, log, err, fmt, arg1, arg2, arg3, arg4)
#define ngx_log_debug5(level, log, err, fmt, arg1, arg2, arg3, arg4, arg5)
#define ngx_log_debug6(level, log, err, fmt, arg1, arg2, arg3, arg4, arg5, arg6)
#define ngx_log_debug7(level, log, err, fmt, arg1, arg2, arg3, arg4, arg5,    \
                       arg6, arg7)
#define ngx_log_debug8(level, log, err, fmt, arg1, arg2, arg3, arg4, arg5,    \
                       arg6, arg7, arg8)

#endif

/*********************************/

#define ngx_log_alloc_log(pool, log)  ngx_palloc(pool, log, sizeof(ngx_log_t))
#define ngx_log_copy_log(new, old)    ngx_memcpy(new, old, sizeof(ngx_log_t))

ngx_log_t *ngx_log_init(void);
ngx_log_t *ngx_log_create_errlog(ngx_cycle_t *cycle, ngx_array_t *args);
char *ngx_set_error_log_levels(ngx_conf_t *cf, ngx_log_t *log);


extern ngx_module_t  ngx_errlog_module;


#endif /* _NGX_LOG_H_INCLUDED_ */