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/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* Fluent Bit
* ==========
* Copyright (C) 2015-2022 The Fluent Bit Authors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef FLB_WINLOG_H
#define FLB_WINLOG_H
struct winlog_config {
unsigned int interval_sec;
unsigned int interval_nsec;
unsigned int bufsize;
int string_inserts;
int use_ansi;
char *buf;
struct mk_list *active_channel;
struct flb_sqldb *db;
flb_pipefd_t coll_fd;
struct flb_input_instance *ins;
};
struct winlog_channel {
HANDLE h;
char *name;
unsigned int record_number;
unsigned int time_written;
unsigned int seek;
struct mk_list _head;
};
struct winlog_sqlite_record {
char *name;
unsigned int record_number;
unsigned int time_written;
unsigned int created;
};
/*
* Open a Windows Event Log channel.
*/
struct winlog_channel *winlog_open(const char *channel);
void winlog_close(struct winlog_channel *ch);
/*
* Read records from a channel.
*/
int winlog_read(struct winlog_channel *ch, char *buf, unsigned int size, unsigned int *read);
/*
* A bulk API to handle multiple channels at once using mk_list.
*
* "channels" are comma-separated names like "Setup,Security".
*/
struct mk_list *winlog_open_all(const char *channels);
void winlog_close_all(struct mk_list *list);
void winlog_pack_event(msgpack_packer *mp_pck, PEVENTLOGRECORD evt,
struct winlog_channel *ch, struct winlog_config *ctx);
/*
* Save the read offset to disk.
*/
int winlog_sqlite_load(struct winlog_channel *ch, struct flb_sqldb *db);
int winlog_sqlite_save(struct winlog_channel *ch, struct flb_sqldb *db);
/*
* SQL templates
*/
#define SQL_CREATE_CHANNELS \
"CREATE TABLE IF NOT EXISTS in_winlog_channels (" \
" name TEXT PRIMARY KEY," \
" record_number INTEGER," \
" time_written INTEGER," \
" created INTEGER" \
");"
#define SQL_GET_CHANNEL \
"SELECT name, record_number, time_written, created" \
" FROM in_winlog_channels WHERE name = '%s';"
/*
* This uses UPCERT i.e. execute INSERT first and fall back to
* UPDATE if the entry already exists. It saves the trouble of
* doing an existence check manually.
*
* https://www.sqlite.org/lang_UPSERT.html
*/
#define SQL_UPDATE_CHANNEL \
"INSERT INTO in_winlog_channels" \
" (name, record_number, time_written, created)" \
" VALUES ('%s', %u, %u, %llu)" \
" ON CONFLICT(name) DO UPDATE" \
" SET record_number = excluded.record_number," \
" time_written = excluded.time_written"
#endif
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