Patch refactor scm and textui (#289)

* 重构屏幕管理器和textui框架

* 切换字体为spleen，并增加对字体的抽象

* 修正文档

---------

Co-authored-by: longjin <longjin@RinGoTek.cn>

user/apps/shell/cmd.c

@@ -506,6 +506,7 @@ int shell_cmd_exec(int argc, char **argv)
         int path_len = 0;
         char *file_path = get_target_filepath(argv[1], &path_len);
         // printf("before execv, path=%s, argc=%d\n", file_path, argc);
+
         execv(file_path, argv);
         // printf("after execv, path=%s, argc=%d\n", file_path, argc);
         free(argv);
@@ -520,13 +521,14 @@ int shell_cmd_exec(int argc, char **argv)
             waitpid(pid, &retval, 0);
         else
             printf("[1] %d\n", pid); // 输出子进程的pid
-        
+
         free(argv);
     }
 }
 
 int shell_cmd_about(int argc, char **argv)
 {
+
     if (argv != NULL)
         free(argv);
     int aac = 0;

user/apps/shell/shell.c

@@ -79,8 +79,12 @@ void main_loop(int kb_fd)
             strcpy(command_origin, input_buffer);
             int cmd_num = parse_command(input_buffer, &argc, &argv);
             printf("\n");
+          
+
             if (cmd_num >= 0)
                 shell_run_built_in_command(cmd_num, argc, argv);
+            
+            
         }
         else
             printf("\n");

user/libs/libc/src/unistd.c

@@ -155,6 +155,7 @@ int execv(const char *path, char *const argv[])
         errno = -ENOENT;
         return -1;
     }
+
     int retval = syscall_invoke(SYS_EXECVE, (uint64_t)path, (uint64_t)argv, 0, 0, 0, 0, 0, 0);
     if (retval != 0)
         return -1;