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设备驱动模型：完善platform bus相关内容。并注册串口到sysfs (#403)

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* 完成初始化platform bus
* 删除旧的sysfs
* 把uart驱动移动到tty/serial文件夹下
* 完成将串口挂载到sysfs
* 修复vfs系统调用未能follow symlink的问题
* 修复shell未能正确获取pwd的问题
This commit is contained in:
LoGin
2023-10-20 22:11:33 +08:00
committed by GitHub
parent 06d5e24726
commit a03c4f9dee
61 changed files with 2904 additions and 1325 deletions
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27
user/apps/shell/cmd.c
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@ -14,8 +14,11 @@
#include <sys/wait.h>
#include <unistd.h>
#define MAX_PATH_LEN 4096
// 当前工作目录（在main_loop中初始化）
char *shell_current_path = NULL;
/**
* @brief shell 内建函数的主命令与处理函数的映射表
*
@ -181,16 +184,18 @@ int shell_cmd_cd(int argc, char **argv)
if (ec == 0)
{
// 获取新的路径字符串
char *new_path = (char *)malloc(dest_len + 2);
memset(new_path, 0, dest_len + 2);
strncpy(new_path, argv[1], dest_len);
char *new_path = (char *)malloc(MAX_PATH_LEN);
if (new_path==NULL) {
goto fail;
}
memset(new_path, 0, MAX_PATH_LEN);
getcwd(new_path, MAX_PATH_LEN);
// 释放原有的路径字符串的内存空间
free(shell_current_path);
shell_current_path = new_path;
shell_current_path[dest_len] = '\0';
return 0;
}
else
@ -216,7 +221,7 @@ int shell_cmd_cd(int argc, char **argv)
// 拼接出新的字符串
char *new_path = (char *)malloc(new_len + 2);
memset(new_path, 0, sizeof(new_path));
memset(new_path, 0, new_len);
strncpy(new_path, shell_current_path, current_dir_len);
if (current_dir_len > 1)
@ -225,10 +230,16 @@ int shell_cmd_cd(int argc, char **argv)
int x = chdir(new_path);
if (x == 0) // 成功切换目录
{
free(new_path);
free(shell_current_path);
// printf("new_path=%s, newlen= %d\n", new_path, new_len);
new_path[new_len + 1] = '\0';
shell_current_path = new_path;
char * pwd = malloc(MAX_PATH_LEN);
if (pwd==NULL) {
goto fail;
}
memset(pwd, 0, MAX_PATH_LEN);
getcwd(pwd, MAX_PATH_LEN);
shell_current_path = pwd;
goto done;
}
else