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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.
*/
#include <fluent-bit/flb_input_plugin.h>
#include <fluent-bit/flb_compat.h>
#include <fluent-bit/flb_log.h>
#include <fluent-bit/flb_mem.h>
#include <fluent-bit/flb_str.h>
#include "in_collectd.h"
#include "typesdb.h"
#include "typesdb_parser.h"
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
/* Internal function to load from a single TypesDB */
static int typesdb_load(struct flb_in_collectd_config *ctx,
struct mk_list *tdb, const char *path)
{
int fd = open(path, O_RDONLY);
if (fd < 0) {
flb_errno();
flb_plg_error(ctx->ins, "failed to open '%s'", path);
return -1;
}
if (typesdb_parse(tdb, fd)) {
flb_plg_error(ctx->ins, "failed to parse '%s'", path);
close(fd);
return -1;
}
close(fd);
return 0;
}
/*
* Load multiple TypesDB files at once. The return value is
* a linked list of typesdb_node objects.
*
* "paths" is a comma-separated list of file names.
*/
struct mk_list *typesdb_load_all(struct flb_in_collectd_config *ctx,
const char *paths)
{
char *buf;
char *state;
char *path;
struct mk_list *tdb;
buf = flb_strdup(paths);
if (!buf) {
flb_errno();
return NULL;
}
tdb = flb_malloc(sizeof(struct mk_list));
if (!tdb) {
flb_errno();
flb_free(buf);
return NULL;
}
mk_list_init(tdb);
path = strtok_r(buf, ",", &state);
while (path) {
if (typesdb_load(ctx, tdb, path)) {
typesdb_destroy(tdb);
flb_free(buf);
return NULL;
}
path = strtok_r(NULL, ",", &state);
}
flb_free(buf);
return tdb;
}
void typesdb_destroy(struct mk_list *tdb)
{
struct typesdb_node *node;
struct mk_list *head;
struct mk_list *tmp;
mk_list_foreach_safe(head, tmp, tdb) {
node = mk_list_entry(head, struct typesdb_node, _head);
typesdb_destroy_node(node);
}
flb_free(tdb);
}
struct typesdb_node *typesdb_find_node(struct mk_list *tdb, const char *type)
{
struct typesdb_node *node;
struct mk_list *head;
if (type == NULL) {
return NULL;
}
/*
* Search the linked list from the tail so that later entries
* take precedence over earlier ones.
*/
mk_list_foreach_r(head, tdb) {
node = mk_list_entry(head, struct typesdb_node, _head);
if (strcmp(node->type, type) == 0) {
return node;
}
}
return NULL;
}
struct typesdb_node *typesdb_last_node(struct mk_list *tdb)
{
return mk_list_entry_last(tdb, struct typesdb_node, _head);
}
/*
* The folloings are API functions to modify a TypesDB instance.
*/
int typesdb_add_node(struct mk_list *tdb, const char *type)
{
struct typesdb_node *node;
node = flb_calloc(1, sizeof(struct typesdb_node));
if (!node) {
flb_errno();
return -1;
}
node->type = flb_strdup(type);
if (!node->type) {
flb_errno();
flb_free(node);
return -1;
}
mk_list_add(&node->_head, tdb);
return 0;
}
void typesdb_destroy_node(struct typesdb_node *node)
{
int i;
flb_free(node->type);
if (node->fields) {
for (i = 0; i < node->count; i++) {
flb_free(node->fields[i]);
}
flb_free(node->fields);
}
mk_list_del(&node->_head);
flb_free(node);
}
int typesdb_add_field(struct typesdb_node *node, const char *field)
{
char *end;
int alloc;
char **fields;
end = strchr(field, ':');
if (!end) {
return -1;
}
if (node->count >= node->alloc) {
alloc = node->alloc > 0 ? node->alloc * 2 : 1;
fields = flb_realloc(node->fields, alloc * sizeof(char *));
if (!fields) {
flb_errno();
return -1;
}
node->alloc = alloc;
node->fields = fields;
}
node->fields[node->count] = flb_strndup(field, end - field);
if (!node->fields[node->count]) {
flb_errno();
return -1;
}
node->count++;
return 0;
}
/* A debug function to see the content of TypesDB */
void typesdb_dump(struct mk_list *tdb)
{
struct mk_list *head;
struct typesdb_node *node;
int i;
mk_list_foreach(head, tdb) {
node = mk_list_entry(head, struct typesdb_node, _head);
printf("%s", node->type);
for (i = 0; i < node->count; i++) {
printf("\t%s", node->fields[i]);
}
putchar('\n');
}
}
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