18 char *shell_current_path = NULL;
42     char *file_path = NULL;  in get_target_filepath()
248     if (dir == NULL)  in shell_cmd_ls()
251     struct dirent *buf = NULL;  in shell_cmd_ls()
257         if (buf == NULL)  in shell_cmd_ls()
276     if (argv != NULL)  in shell_cmd_ls()
293     if (argv != NULL)  in shell_cmd_pwd()
330     if (argv != NULL)  in shell_cmd_cat()
367     if (argv != NULL)  in shell_cmd_touch()
384     char *full_path = NULL;  in shell_cmd_mkdir()
396     if (argv != NULL)  in shell_cmd_mkdir()
412     char *full_path = NULL;  in shell_cmd_rmdir()
427     if (argv != NULL)  in shell_cmd_rmdir()
443     char *full_path = NULL;  in shell_cmd_rm()
462     if (argv != NULL)  in shell_cmd_rm()
509     if (argv != NULL)  in shell_cmd_about()
582     if (argv != NULL)  in shell_cmd_free()