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https://github.com/RT-Thread/rt-thread.git
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972931c991
This change introduces the `lwp_runtime.c` component, which provides the necessary runtime environment for the init process, including boot scripts, shutdown, and poweroff functionalities. The initialization logic has been moved from `lwp.c` to this new file, enhancing modularity and flexibility in handling LWP runtime tasks. Changes: - Moved the `lwp_startup` function from `lwp.c` to `lwp_runtime.c` to handle system initialization and runtime environment setup. - Added `lwp_teardown` placeholder for system shutdown and cleanup tasks in the future (though not yet implemented). - Introduced the `LWP_USING_RUNTIME` configuration option in `Kconfig` to conditionally enable the runtime environment. - Updated the `SConscript` to conditionally include `lwp_runtime.c` based on the `LWP_USING_RUNTIME` configuration. - Removed the old `lwp_startup` code from `lwp.c`, simplifying the file. Signed-off-by: Shell <smokewood@qq.com>
112 lines
2.7 KiB
C
112 lines
2.7 KiB
C
/*
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* Copyright (c) 2006-2024, RT-Thread Development Team
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Change Logs:
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* Date Author Notes
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* 2024-11-11 Shell moved lwp_startup() from lwp.c;
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* added lwp_teardown()
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*/
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#define DBG_TAG "lwp"
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#define DBG_LVL DBG_INFO
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#include <rtdbg.h>
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#include "lwp_internal.h"
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#include <rthw.h>
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#include <rtthread.h>
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#include <dfs_file.h>
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#include <dfs_mnt.h>
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#include <dfs_fs.h>
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/**
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* lwp_runtime:
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* Runtime environment provide by init process including boot scripts,
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* poweroff, shutdown, reboot, service management etc. In the kernel, lwp will
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* provide the underlying software bootstrap and cleanup for the init proc.
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*
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*/
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rt_weak int lwp_startup_debug_request(void)
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{
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return 0;
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}
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#define LATENCY_TIMES (3)
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#define LATENCY_IN_MSEC (128)
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#define LWP_CONSOLE_PATH "CONSOLE=/dev/console"
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const char *init_search_path[] = {
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"/sbin/init",
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"/bin/init",
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};
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/**
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* Startup process 1 and do the essential works
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*/
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static int lwp_startup(void)
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{
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int error;
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const char *init_path;
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char *argv[] = {0, "&"};
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char *envp[] = {LWP_CONSOLE_PATH, 0};
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#ifdef LWP_DEBUG_INIT
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int command;
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int countdown = LATENCY_TIMES;
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while (countdown)
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{
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command = lwp_startup_debug_request();
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if (command)
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{
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return 0;
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}
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rt_kprintf("Press any key to stop init process startup ... %d\n", countdown);
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countdown -= 1;
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rt_thread_mdelay(LATENCY_IN_MSEC);
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}
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rt_kprintf("Starting init ...\n");
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#endif /* LWP_DEBUG_INIT */
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for (size_t i = 0; i < sizeof(init_search_path)/sizeof(init_search_path[0]); i++)
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{
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struct stat s;
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init_path = init_search_path[i];
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error = stat(init_path, &s);
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if (error == 0)
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{
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argv[0] = (void *)init_path;
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error = lwp_execve((void *)init_path, 0, sizeof(argv)/sizeof(argv[0]), argv, envp);
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if (error < 0)
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{
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LOG_W("%s: failed to setup runtime environment\b"
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"\tlwp_execve() failed with code %d", __func__, error);
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}
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else if (error != 1)
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{
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LOG_W("%s: pid 1 is already allocated", __func__);
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error = -EBUSY;
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}
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else
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{
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rt_lwp_t p = lwp_from_pid_locked(1);
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p->sig_protected = 1;
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error = 0;
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}
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break;
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}
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}
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if (error)
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{
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LOG_D("%s: failed to setup runtime environment\b"
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"\tinit program not found", __func__);
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}
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return error;
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}
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INIT_APP_EXPORT(lwp_startup);
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