/
ngx_log.h
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/
ngx_log.h
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/*
* Copyright (C) Igor Sysoev
* Copyright (C) Nginx, Inc.
*/
#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_MAIL 0x200
#define NGX_LOG_DEBUG_STREAM 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_STREAM
#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);
typedef void (*ngx_log_writer_pt) (ngx_log_t *log, ngx_uint_t level,
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;
time_t disk_full_time;
ngx_log_handler_pt handler;
void *data;
ngx_log_writer_pt writer;
void *wdata;
/*
* 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;
ngx_log_t *next;
};
#define NGX_MAX_ERROR_STR 2048
/*********************************/
#if (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__)
/*********************************/
#elif (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)
/*********************************/
#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(level, log, err, fmt) \
ngx_log_debug(level, log, err, fmt)
#define ngx_log_debug1(level, log, err, fmt, arg1) \
ngx_log_debug(level, log, err, fmt, arg1)
#define ngx_log_debug2(level, log, err, fmt, arg1, arg2) \
ngx_log_debug(level, log, err, fmt, arg1, arg2)
#define ngx_log_debug3(level, log, err, fmt, arg1, arg2, arg3) \
ngx_log_debug(level, log, err, fmt, arg1, arg2, arg3)
#define ngx_log_debug4(level, log, err, fmt, arg1, arg2, arg3, arg4) \
ngx_log_debug(level, log, err, fmt, arg1, arg2, arg3, arg4)
#define ngx_log_debug5(level, log, err, fmt, arg1, arg2, arg3, arg4, arg5) \
ngx_log_debug(level, log, err, fmt, arg1, arg2, arg3, arg4, arg5)
#define ngx_log_debug6(level, log, err, fmt, \
arg1, arg2, arg3, arg4, arg5, arg6) \
ngx_log_debug(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) \
ngx_log_debug(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) \
ngx_log_debug(level, log, err, fmt, \
arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8)
#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 /* !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
/*********************************/
ngx_log_t *ngx_log_init(u_char *prefix);
void ngx_cdecl ngx_log_abort(ngx_err_t err, const char *fmt, ...);
void ngx_cdecl ngx_log_stderr(ngx_err_t err, const char *fmt, ...);
u_char *ngx_log_errno(u_char *buf, u_char *last, ngx_err_t err);
ngx_int_t ngx_log_open_default(ngx_cycle_t *cycle);
ngx_int_t ngx_log_redirect_stderr(ngx_cycle_t *cycle);
ngx_log_t *ngx_log_get_file_log(ngx_log_t *head);
char *ngx_log_set_log(ngx_conf_t *cf, ngx_log_t **head);
/*
* ngx_write_stderr() cannot be implemented as macro, since
* MSVC does not allow to use #ifdef inside macro parameters.
*
* ngx_write_fd() is used instead of ngx_write_console(), since
* CharToOemBuff() inside ngx_write_console() cannot be used with
* read only buffer as destination and CharToOemBuff() is not needed
* for ngx_write_stderr() anyway.
*/
static ngx_inline void
ngx_write_stderr(char *text)
{
(void) ngx_write_fd(ngx_stderr, text, ngx_strlen(text));
}
static ngx_inline void
ngx_write_stdout(char *text)
{
(void) ngx_write_fd(ngx_stdout, text, ngx_strlen(text));
}
extern ngx_module_t ngx_errlog_module;
extern ngx_uint_t ngx_use_stderr;
#endif /* _NGX_LOG_H_INCLUDED_ */