mirror of https://github.com/pygos/usyslog.git
98 lines
2.5 KiB
C
98 lines
2.5 KiB
C
/* SPDX-License-Identifier: GPL-3.0-or-later */
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/*
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* Copyright (C) 2018 - David Oberhollenzer
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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#ifndef SYSLOGD_H
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#define SYSLOGD_H
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#include <sys/types.h>
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#include <stdbool.h>
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#include <time.h>
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#include "config.h"
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#define SYSLOG_SOCKET "/dev/log"
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#define SYSLOG_PATH "/var/log"
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#define DEFAULT_USER "syslogd"
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#define DEFAULT_GROUP "syslogd"
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/*
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encapsulates the split up data from a message received
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through the local syslog socket.
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*/
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typedef struct {
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int facility;
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int level;
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time_t timestamp;
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pid_t pid;
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const char *ident;
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const char *message;
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} syslog_msg_t;
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enum {
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/*
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Rotate log data in a way that we still generate a continuous stream
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of log data. E.g. in the case of log files, move the current log file
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to one suffixed with a timestamp. We don't lose any log data.
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*/
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LOG_ROTATE_CONTINUOUS = 0x00,
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/*
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Rotate log data by overwriting old data with more recent data.
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E.g. in the case of log files, move the current log file to one
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with a constant prefix, overwriting any existing data.
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*/
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LOG_ROTATE_OVERWRITE = 0x01,
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/*
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Automatically do a log rotatation if a log stream reaches a preset
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size limit.
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*/
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LOG_ROTATE_SIZE_LIMIT = 0x10,
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};
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typedef struct log_backend_t {
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int (*init)(struct log_backend_t *log, int flags, size_t sizelimit);
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void (*cleanup)(struct log_backend_t *log);
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int (*write)(struct log_backend_t *log, const syslog_msg_t *msg);
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void (*rotate)(struct log_backend_t *log);
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} log_backend_t;
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extern log_backend_t *logmgr;
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/*
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Parse a message string received from the syslog socket and produce
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a split up representation for the message.
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*/
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int syslog_msg_parse(syslog_msg_t *msg, char *str);
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/* Create a unix DGRAM socket. */
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int mksock(const char *path);
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const char *level_id_to_string(int level);
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const char *facility_id_to_string(int level);
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#endif /* LOGFILE_H */
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