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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_info.h>
#include <fluent-bit/flb_env.h>
#include <fluent-bit/flb_mem.h>
#include <fluent-bit/flb_meta.h>
/*
* A meta is a way to extend the configuration through specific commands, e.g:
*
* @SET a=b
*
* the meta command is prefixed with @, the command it self is 'SET' and have
* the parameters 'a=b'.
*
* Each command have their own handler function: meta_cmd_ABC().
*/
/* @SET command: register a key/value as a configuration variable */
static int meta_cmd_set(struct flb_config *ctx, const char *params)
{
int ret;
int len;
char *p;
char *key;
char *val;
p = strchr(params, '=');
if (!p) {
fprintf(stderr, "[meta SET] invalid parameter '%s'\n", params);
return -1;
}
len = strlen(params);
key = mk_string_copy_substr(params, 0, p - params);
if (!key) {
return -1;
}
val = mk_string_copy_substr(params, (p - params) + 1, len);
if (!val) {
flb_free(key);
return -1;
}
/* Set the variable in our local environment */
ret = flb_env_set(ctx->env, key, val);
flb_free(key);
flb_free(val);
return ret;
}
/* Run a specific command */
int flb_meta_run(struct flb_config *ctx, const char *cmd, const char *params)
{
if (strcasecmp(cmd, "SET") == 0) {
return meta_cmd_set(ctx, params);
}
return -1;
}
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