更新日期: 2022/06/01 来源: https://gitee.com/weharmony/kernel_liteos_a_note
proc_init.c
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1/*
2 * Copyright (c) 2013-2019 Huawei Technologies Co., Ltd. All rights reserved.
3 * Copyright (c) 2020-2021 Huawei Device Co., Ltd. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without modification,
6 * are permitted provided that the following conditions are met:
7 *
8 * 1. Redistributions of source code must retain the above copyright notice, this list of
9 * conditions and the following disclaimer.
10 *
11 * 2. Redistributions in binary form must reproduce the above copyright notice, this list
12 * of conditions and the following disclaimer in the documentation and/or other materials
13 * provided with the distribution.
14 *
15 * 3. Neither the name of the copyright holder nor the names of its contributors may be used
16 * to endorse or promote products derived from this software without specific prior written
17 * permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
20 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
21 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
23 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
24 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
25 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
26 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
27 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
28 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
29 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 */
31
32#include "proc_fs.h"
33#include "internal.h"
34#include "stdio.h"
35#include "sys/mount.h"
36#include "sys/stat.h"
37#include "los_init.h"
38
39#ifdef LOSCFG_FS_PROC //使能 PROC 模块
40//pro file 初始化
41#define PROCFS_MOUNT_POINT "/proc"
42#define PROCFS_MOUNT_POINT_SIZE (sizeof(PROCFS_MOUNT_POINT) - 1)
43void ProcFsInit(void)
44{
45 int ret;
46
47 ret = mkdir(PROCFS_MOUNT_POINT, PROCFS_DEFAULT_MODE);//创建 "/proc"
48 if (ret < 0) {
49 PRINT_ERR("failed to mkdir %s, errno = %d\n", PROCFS_MOUNT_POINT, get_errno());
50 return;
51 }
52 //装载文件系统
53 ret = mount(NULL, PROCFS_MOUNT_POINT, "procfs", 0, NULL);//将null 挂到 /proc 上
54 if (ret) {
55 PRINT_ERR("mount procfs err %d\n", ret);
56 return;
57 }
58
59 ProcMountsInit();//初始化 /proc/mounts
60#if defined(LOSCFG_SHELL_CMD_DEBUG) && defined(LOSCFG_KERNEL_VM)
61 ProcVmmInit();//初始化 /proc/vmm
62#endif
63 ProcProcessInit();//初始化 /proc/process
64 ProcUptimeInit();//初始化 /proc/uptime
66 ProcFdInit();
67#ifdef LOSCFG_KERNEL_PM
68 ProcPmInit();
69#endif
70}
71
72LOS_MODULE_INIT(ProcFsInit, LOS_INIT_LEVEL_KMOD_EXTENDED);
73
74#endif
void ProcFsCacheInit(void)
void ProcMountsInit(void)
Definition: mounts_proc.c:90
void ProcUptimeInit(void)
Definition: uptime_proc.c:77
void ProcProcessInit(void)
Definition: process_proc.c:48
void ProcFdInit(void)
Definition: fd_proc.c:136
void ProcPmInit(void)
Definition: power_proc.c:148
void ProcVmmInit(void)
Definition: vmm_proc.c:106
LOS_MODULE_INIT(ProcFsInit, LOS_INIT_LEVEL_KMOD_EXTENDED)
void ProcFsInit(void)
init proc fs
Definition: proc_init.c:43