/*      $NetBSD: logging.h,v 1.1.1.1 2009/04/12 15:33:34 christos Exp $ */

/*
* Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC")
* Copyright (c) 1996-1999 by Internet Software Consortium.
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
* OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/

#ifndef LOGGING_H
#define LOGGING_H

#include <sys/types.h>
#include <stdio.h>
#include <stdarg.h>
#include <unistd.h>

#define log_critical            (-5)
#define log_error               (-4)
#define log_warning             (-3)
#define log_notice              (-2)
#define log_info                (-1)
#define log_debug(level)        (level)

typedef enum { log_syslog, log_file, log_null } log_channel_type;

#define LOG_MAX_VERSIONS 99

#define LOG_CLOSE_STREAM                0x0001
#define LOG_TIMESTAMP                   0x0002
#define LOG_TRUNCATE                    0x0004
#define LOG_USE_CONTEXT_LEVEL           0x0008
#define LOG_PRINT_LEVEL                 0x0010
#define LOG_REQUIRE_DEBUG               0x0020
#define LOG_CHANNEL_BROKEN              0x0040
#define LOG_PRINT_CATEGORY              0x0080
#define LOG_CHANNEL_OFF                 0x0100

typedef struct log_context *log_context;
typedef struct log_channel *log_channel;

#define LOG_OPTION_DEBUG                0x01
#define LOG_OPTION_LEVEL                0x02

#define log_open_stream         __log_open_stream
#define log_close_stream        __log_close_stream
#define log_get_stream          __log_get_stream
#define log_get_filename        __log_get_filename
#define log_check_channel       __log_check_channel
#define log_check               __log_check
#define log_vwrite              __log_vwrite
#define log_write               __log_write
#define log_new_context         __log_new_context
#define log_free_context        __log_free_context
#define log_add_channel         __log_add_channel
#define log_remove_channel      __log_remove_channel
#define log_option              __log_option
#define log_category_is_active  __log_category_is_active
#define log_new_syslog_channel  __log_new_syslog_channel
#define log_new_file_channel    __log_new_file_channel
#define log_set_file_owner      __log_set_file_owner
#define log_new_null_channel    __log_new_null_channel
#define log_inc_references      __log_inc_references
#define log_dec_references      __log_dec_references
#define log_get_channel_type    __log_get_channel_type
#define log_free_channel        __log_free_channel
#define log_close_debug_channels        __log_close_debug_channels

FILE *                  log_open_stream(log_channel);
int                     log_close_stream(log_channel);
FILE *                  log_get_stream(log_channel);
char *                  log_get_filename(log_channel);
int                     log_check_channel(log_context, int, log_channel);
int                     log_check(log_context, int, int);
#ifdef __GNUC__
void                    log_vwrite(log_context, int, int, const char *,
                                  va_list args)
                               __attribute__((__format__(__printf__, 4, 0)));
void                    log_write(log_context, int, int, const char *, ...)
                               __attribute__((__format__(__printf__, 4, 5)));
#else
void                    log_vwrite(log_context, int, int, const char *,
                                  va_list args);
void                    log_write(log_context, int, int, const char *, ...);
#endif
int                     log_new_context(int, char **, log_context *);
void                    log_free_context(log_context);
int                     log_add_channel(log_context, int, log_channel);
int                     log_remove_channel(log_context, int, log_channel);
int                     log_option(log_context, int, int);
int                     log_category_is_active(log_context, int);
log_channel             log_new_syslog_channel(unsigned int, int, int);
log_channel             log_new_file_channel(unsigned int, int, const char *,
                                            FILE *, unsigned int,
                                            unsigned long);
int                     log_set_file_owner(log_channel, uid_t, gid_t);
log_channel             log_new_null_channel(void);
int                     log_inc_references(log_channel);
int                     log_dec_references(log_channel);
log_channel_type        log_get_channel_type(log_channel);
int                     log_free_channel(log_channel);
void                    log_close_debug_channels(log_context);

#endif /* !LOGGING_H */
/*! \file */

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