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/* SPDX-License-Identifier: GPL-3.0-or-later */
/*
* Copyright (C) 2018 - David Oberhollenzer
*
* This program 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 3 of the License, or
* (at your option) any later version.
*
* This program 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 this program. If not, see <https://www.gnu.org/licenses/>.
*/
#ifndef SYSLOGD_H
#define SYSLOGD_H
#include <sys/types.h>
#include <stdbool.h>
#include <time.h>
#include "config.h"
#define SYSLOG_SOCKET "/dev/log"
#define SYSLOG_PATH "/var/log"
#define DEFAULT_USER "syslogd"
#define DEFAULT_GROUP "syslogd"
/*
encapsulates the split up data from a message received
through the local syslog socket.
*/
typedef struct {
int facility;
int level;
time_t timestamp;
pid_t pid;
const char *ident;
const char *message;
} syslog_msg_t;
enum {
/*
Rotate log data in a way that we still generate a continuous stream
of log data. E.g. in the case of log files, move the current log file
to one suffixed with a timestamp. We don't lose any log data.
*/
LOG_ROTATE_CONTINUOUS = 0x00,
/*
Rotate log data by overwriting old data with more recent data.
E.g. in the case of log files, move the current log file to one
with a constant prefix, overwriting any existing data.
*/
LOG_ROTATE_OVERWRITE = 0x01,
/*
Automatically do a log rotatation if a log stream reaches a preset
size limit.
*/
LOG_ROTATE_SIZE_LIMIT = 0x10,
};
typedef struct log_backend_t {
int (*init)(struct log_backend_t *log, int flags, size_t sizelimit);
void (*cleanup)(struct log_backend_t *log);
int (*write)(struct log_backend_t *log, const syslog_msg_t *msg);
void (*rotate)(struct log_backend_t *log);
} log_backend_t;
extern log_backend_t *logmgr;
/*
Parse a message string received from the syslog socket and produce
a split up representation for the message.
*/
int syslog_msg_parse(syslog_msg_t *msg, char *str);
/* Create a unix DGRAM socket. */
int mksock(const char *path);
const char *level_id_to_string(int level);
const char *facility_id_to_string(int level);
#endif /* LOGFILE_H */
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