18 char *shell_current_path = NULL;
53     char *file_path = NULL;  in get_target_filepath()
259     if (dir == NULL)  in shell_cmd_ls()
262     struct dirent *buf = NULL;  in shell_cmd_ls()
268         if (buf == NULL)  in shell_cmd_ls()
287     if (argv != NULL)  in shell_cmd_ls()
304     if (argv != NULL)  in shell_cmd_pwd()
352     if (argv != NULL)  in shell_cmd_cat()
389     if (argv != NULL)  in shell_cmd_touch()
406     char *full_path = NULL;  in shell_cmd_mkdir()
418     if (argv != NULL)  in shell_cmd_mkdir()
434     char *full_path = NULL;  in shell_cmd_rmdir()
449     if (argv != NULL)  in shell_cmd_rmdir()
465     char *full_path = NULL;  in shell_cmd_rm()
484     if (argv != NULL)  in shell_cmd_rm()
530     if (argv != NULL)  in shell_cmd_about()
603     if (argv != NULL)  in shell_cmd_free()