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/*
* $Id$
*
* Zebra logging funcions.
* Copyright (C) 1997, 1998, 1999 Kunihiro Ishiguro
*
* This file is part of GNU Zebra.
*
* GNU Zebra is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2, or (at your option) any
* later version.
*
* GNU Zebra is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with GNU Zebra; see the file COPYING. If not, write to the Free
* Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
* 02111-1307, USA.
*/
#ifndef _ZEBRA_LOG_H
#define _ZEBRA_LOG_H
#include "misc.h"
#include <signal.h>
#include <syslog.h>
#include <stdio.h>
#include "vargs.h"
#include "pthread_safe.h"
/* Here is some guidance on logging levels to use:
*
* LOG_DEBUG - For all messages that are enabled by optional debugging
* features, typically preceded by "if (IS...DEBUG...)"
* LOG_INFO - Information that may be of interest, but everything seems
* to be working properly.
* LOG_NOTICE - Only for message pertaining to daemon startup or shutdown.
* LOG_WARNING - Warning conditions: unexpected events, but the daemon believes
* it can continue to operate correctly.
* LOG_ERR - Error situations indicating malfunctions. Probably require
* attention.
*
* Note: LOG_CRIT, LOG_ALERT, and LOG_EMERG are currently not used anywhere,
* please use LOG_ERR instead.
*/
typedef enum
{
ZLOG_NONE,
ZLOG_DEFAULT,
ZLOG_ZEBRA,
ZLOG_RIP,
ZLOG_BGP,
ZLOG_OSPF,
ZLOG_RIPNG,
ZLOG_OSPF6,
ZLOG_ISIS,
ZLOG_MASC
} zlog_proto_t;
/* If maxlvl is set to ZLOG_DISABLED, then no messages will be sent
* to that logging destination.
*/
enum { ZLOG_DISABLED = LOG_EMERG - 1 } ;
typedef enum
{
ZLOG_DEST_SYSLOG = 0,
ZLOG_DEST_FILE,
ZLOG_DEST_STDOUT,
ZLOG_DEST_MONITOR,
ZLOG_DEST_COUNT /* Number of destinations */
} zlog_dest_t;
struct zlog
{
struct zlog* next ; /* To support multiple logging streams */
const char *ident; /* daemon name (first arg to openlog) */
zlog_proto_t protocol ;
int maxlvl[ZLOG_DEST_COUNT]; /* maximum priority set */
int default_lvl; /* maxlvl to use if none is specified */
int emaxlvl[ZLOG_DEST_COUNT]; /* effective maximum priority */
bool syslog ; /* have active syslog */
int file_fd ; /* fd for ZLOG_DEST_FILE (if any) */
int stdout_fd ; /* fd for ZLOG_DEST_STDOUT */
int monitors ; /* count of monitors */
char *filename; /* for ZLOG_DEST_FILE */
int facility; /* as per syslog facility */
int syslog_options; /* 2nd arg to openlog */
int timestamp_precision; /* # of digits of subsecond precision */
bool record_priority; /* should messages logged through stdio
include the priority of the message? */
} ;
/* Message structure. */
struct message
{
int key;
const char *str;
};
/* module initialization */
extern void zlog_init_r(void);
extern void zlog_destroy_r(void);
/* Default logging structure. */
extern struct zlog *zlog_default;
/* Open zlog function */
extern struct zlog *openzlog (const char *progname, zlog_proto_t protocol,
int syslog_options, int syslog_facility);
/* Close zlog function. */
extern void closezlog (struct zlog *zl);
/* Generic function for zlog. */
extern void zlog (struct zlog *zl, int priority, const char *format, ...)
PRINTF_ATTRIBUTE(3, 4);
/* Handy zlog functions. */
#define zlog_thus(thus, ...) zlog(zlog_default, thus, __VA_ARGS__)
#define zlog_err(...) zlog(zlog_default, LOG_ERR, __VA_ARGS__)
#define zlog_warn(...) zlog(zlog_default, LOG_WARNING, __VA_ARGS__)
#define zlog_info(...) zlog(zlog_default, LOG_INFO, __VA_ARGS__)
#define zlog_notice(...) zlog(zlog_default, LOG_NOTICE, __VA_ARGS__)
#define zlog_debug(...) zlog(zlog_default, LOG_DEBUG, __VA_ARGS__)
/* For bgpd's peer oriented log. */
#define plog_thus(zl, thus, ...) zlog(zl, thus, __VA_ARGS__)
#define plog_err(zl, ...) zlog(zl, LOG_ERR, __VA_ARGS__)
#define plog_warn(zl, ...) zlog(zl, LOG_WARNING, __VA_ARGS__)
#define plog_info(zl, ...) zlog(zl, LOG_INFO, __VA_ARGS__)
#define plog_notice(zl, ...) zlog(zl, LOG_NOTICE, __VA_ARGS__)
#define plog_debug(zl, ...) zlog(zl, LOG_DEBUG, __VA_ARGS__)
/* Set logging level for the given destination. If the log_level
argument is ZLOG_DISABLED, then the destination is disabled.
This function should not be used for file logging (use uzlog_set_file
or zlog_reset_file instead). */
extern void zlog_set_level(struct zlog *zl, zlog_dest_t, int log_level);
/* Set logging to the given filename at the specified level. */
extern int zlog_set_file(struct zlog *zl, const char *filename, int log_level);
/* Disable file logging. */
extern int zlog_reset_file(struct zlog *zl);
/* Rotate log. */
extern int zlog_rotate (struct zlog *);
/* getters & setters */
extern int zlog_get_default_lvl (struct zlog *zl);
extern void zlog_set_default_lvl (struct zlog *zl, int level);
extern void zlog_set_default_lvl_dest (struct zlog *zl, int level);
extern int zlog_get_maxlvl (struct zlog *zl, zlog_dest_t dest);
extern int zlog_get_facility (struct zlog *zl);
extern void zlog_set_facility (struct zlog *zl, int facility);
extern bool zlog_get_record_priority (struct zlog *zl);
extern void zlog_set_record_priority (struct zlog *zl, bool record_priority);
extern int zlog_get_timestamp_precision (struct zlog *zl);
extern void zlog_set_timestamp_precision (struct zlog *zl, int timestamp_precision);
extern const char * zlog_get_ident (struct zlog *zl);
extern char * zlog_get_filename (struct zlog *zl);
extern bool zlog_is_file (struct zlog *zl);
extern const char * zlog_get_proto_name (struct zlog *zl);
/* For hackey massage lookup and check */
#define LOOKUP(x, y) mes_lookup(x, x ## _max, y, "(no item found)")
extern const char *lookup (const struct message *, int);
extern const char *mes_lookup (const struct message *meslist,
int max, int index,
const char *no_item);
extern const char *zlog_priority[];
extern const char *zlog_proto_names[];
/* Safe version of strerror -- never returns NULL. */
extern const char *safe_strerror(int errnum);
/* To be called when a fatal signal is caught. */
extern void zlog_signal(int signo, const char *action, siginfo_t *siginfo,
void *program_counter) ;
/* Ring down the curtain -- turn of SIGABRT handler and abort() */
extern void zabort_abort(void) __attribute__ ((noreturn)) ;
/* Log a backtrace. */
extern void zlog_backtrace(int priority);
/* Log a backtrace, but in an async-signal-safe way. Should not be
called unless the program is about to exit or abort, since it messes
up the state of zlog file pointers. If program_counter is non-NULL,
that is logged in addition to the current backtrace. */
extern void zlog_backtrace_sigsafe(int priority, void *program_counter);
/* Defines for use in command construction: */
#define LOG_LEVELS "(emergencies|alerts|critical|errors|" \
"warnings|notifications|informational|debugging)"
#define LOG_LEVEL_DESC \
"System is unusable\n" \
"Immediate action needed\n" \
"Critical conditions\n" \
"Error conditions\n" \
"Warning conditions\n" \
"Normal but significant conditions\n" \
"Informational messages\n" \
"Debugging messages\n"
#define LOG_FACILITIES "(kern|user|mail|daemon|auth|syslog|lpr|news|uucp|cron|local0|local1|local2|local3|local4|local5|local6|local7)"
#define LOG_FACILITY_DESC \
"Kernel\n" \
"User process\n" \
"Mail system\n" \
"System daemons\n" \
"Authorization system\n" \
"Syslog itself\n" \
"Line printer system\n" \
"USENET news\n" \
"Unix-to-Unix copy system\n" \
"Cron/at facility\n" \
"Local use\n" \
"Local use\n" \
"Local use\n" \
"Local use\n" \
"Local use\n" \
"Local use\n" \
"Local use\n" \
"Local use\n"
#endif /* _ZEBRA_LOG_H */
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