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2085e1ca96
The preset kvdb service defined in parser.c conflicts with user-defined kvdb service in board-level init.rc, causing: Error redefined service 'kvdb' Add SVC_FALLBACK flag and fallback service option. When a service is marked as fallback, it will be silently ignored if another service with the same name already exists. This is the semantic opposite of override: - override: new definition replaces old - fallback: new definition yields to old - old has fallback + new arrives: old yields to new If neither flag is set, duplicate service names still produce EEXIST error as before. Mark the preset kvdb service as fallback so that board-specific init.rc can freely define its own kvdb service without conflict. Signed-off-by: wangjianyu3 <wangjianyu3@xiaomi.com>
159 lines
5.3 KiB
C
159 lines
5.3 KiB
C
/****************************************************************************
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* apps/system/nxinit/service.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_SERVICE_H
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#define __APPS_SYSTEM_NXINIT_SERVICE_H
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/list.h>
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#include <stdint.h>
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#include <sys/types.h>
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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/* Ref to Android Init
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* URL: https://android.googlesource.com/platform/system/core/+/
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* android16-release/init/service.h#42
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*/
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#define SVC_DISABLED (1 << 0) /* do not autostart with class */
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#define SVC_ONESHOT (1 << 1) /* do not restart on exit */
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#define SVC_RUNNING (1 << 2) /* currently active */
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#define SVC_RESTARTING (1 << 3) /* waiting to restart */
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#define SVC_CONSOLE (1 << 4) /* requires a console as its stdio */
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/* This service should be stopped with SIGTERM instead of SIGKILL.
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* Will still be SIGKILLed after timeout period of 200 ms.
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*/
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#define SVC_GENTLE_KILL (1 << 13)
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/* Flags below are new added.
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*/
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/* Fallback: silently ignored if a service with the same name exists */
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#define SVC_FALLBACK (1 << 28)
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/* Override the previous definition for a service with the same name */
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#define SVC_OVERRIDE (1 << 29)
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/* Already sent SIGKILL, and should not send again. */
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#define SVC_SIGKILL (1 << 30)
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/* Should be removed immediately after stopped */
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#define SVC_REMOVE (1 << 31)
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#define NXINIT_SERVICE_NAME_MAX 32
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#define NXINIT_ACTION_CMD_ARGS_MAX 99
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/****************************************************************************
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* Public Types
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****************************************************************************/
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struct service_class_s
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{
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struct list_node node; /* Service class list node */
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FAR char name[NXINIT_SERVICE_NAME_MAX];
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};
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struct service_s
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{
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struct list_node node; /* Service list node */
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struct list_node classes; /* Class header, struct service_class_s */
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uint32_t flags;
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/* The explanation of the `argv` parameter.
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*
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* | Index | Value | Details |
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* |---------|-------------|-------------------|
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* | argv[0] | "service" | Statement keyword |
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* | argv[1] | name | Service name |
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* | argv[2] | argv[0] | Service pathname |
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* | argv[n] | argv[n - 2] | Service arguments |
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*/
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FAR char *argv[CONFIG_SYSTEM_NXINIT_SERVICE_ARGS_MAX];
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int argc;
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struct timespec time_started;
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struct timespec time_kill;
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int restart_period;
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pid_t pid;
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/* The device given by the service option "console". NULL means that the
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* default console device is used. Only meaningful with SVC_CONSOLE.
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*/
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FAR char *console;
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/* The "target" of service option "reboot_on_failure" */
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#ifdef CONFIG_BOARDCTL_RESET
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int reset_reason;
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#endif
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};
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struct service_manager_s
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{
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struct list_node services; /* Service header, struct service_s */
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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_service_refresh(FAR struct service_manager_s *sm);
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void init_service_reap(FAR struct service_s *service, int status);
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int init_service_start(FAR struct service_s *service);
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int init_service_stop(FAR struct service_s *service);
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int init_service_start_by_class(FAR struct service_manager_s *sm,
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FAR const char *name);
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int init_service_stop_by_class(FAR struct service_manager_s *sm,
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FAR const char *name);
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FAR struct service_s *
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init_service_find_by_name(FAR struct service_manager_s *sm,
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FAR const char *name);
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FAR struct service_s *
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init_service_find_by_pid(FAR struct service_manager_s *sm, const int pid);
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int init_service_parse(FAR const struct parser_s *parser,
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bool create, FAR char *buf);
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int init_service_check(FAR const struct parser_s *parser);
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#ifdef CONFIG_SYSTEM_NXINIT_DEBUG
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void init_dump_service(FAR struct service_s *s);
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void init_dump_services(FAR struct list_node *head);
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#else
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# define init_dump_service(s)
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# define init_dump_services(h)
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#endif
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#endif /* __APPS_SYSTEM_NXINIT_SERVICE_H */
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