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This component (abbreviated as "NxInit") is specifically developed
for NuttX and intended for system initialization. While we have
adopted the Android Init Language among various syntax options,
this is a brand-new implementation—it is not a port or variant of
Android Init.
Refer to the implementation of Android Init Language, consists of five broad
classes of statements: Actions, Commands, Services, Options, and Imports.
Actions support two types of triggers: event and action. Action triggers also
support runtime triggering. Services support lifecycle management, including
automatic restart (at specified intervals), and starting/stopping
individually or by class. Import supports files or directories, and we may
add a static method in the future. The following are some differences:
1. The Android Init Language treats lines starting with `#` as comments,
while we use a preprocessor to handle comments.
2. For action commands, we can omit "exec" and directly execute
built-in apps or nsh builtins.
3. Regarding the property service, users can either adapt it by self or
directly use the preset NVS-based properties.
4. Only part of standard action commands and service options are
implemented currlently.
To enable system/nxinit:
```diff
-CONFIG_INIT_ENTRYPOINT="nsh_main"
+CONFIG_INIT_ENTRYPOINT="init_main"
+CONFIG_SYSTEM_NXINIT=y
```
For format and additional details, refer to:
https://android.googlesource.com/platform/system/core/+/
master/init/README.md
Signed-off-by: wangjianyu3 <wangjianyu3@xiaomi.com>
60 lines
2.2 KiB
C
60 lines
2.2 KiB
C
/****************************************************************************
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* apps/system/nxinit/parser.h
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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#ifndef __APPS_SYSTEM_NXINIT_PARSER_H
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#define __APPS_SYSTEM_NXINIT_PARSER_H
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <stdbool.h>
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/****************************************************************************
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* Public Types
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****************************************************************************/
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struct parser_s
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{
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FAR const char *key;
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CODE int (*parse)(FAR const struct parser_s *, bool, FAR char *);
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CODE int (*check)(FAR const struct parser_s *);
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/* Type
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* a. struct action_manager_s
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* b. struct service_manager_s
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*/
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FAR void *priv;
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};
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/****************************************************************************
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* Public Function Prototypes
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****************************************************************************/
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int init_parse_arguments(FAR char *buf, bool dup, int argc, FAR char **argv);
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int init_parse_configs(FAR const struct parser_s *parser,
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FAR const char *path);
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int init_parse_config_file(FAR const struct parser_s *parser,
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FAR const char *file);
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#endif
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