vs环境open
fd = open(save_as_file, O_RDWR|O_CREAT);//创建文件属性为只读
fd = open(save_as_file, O_RDWR|O_CREAT, S_IREAD | S_IWRITE); //属性读写
vs环境open
fd = open(save_as_file, O_RDWR|O_CREAT);//创建文件属性为只读
fd = open(save_as_file, O_RDWR|O_CREAT, S_IREAD | S_IWRITE); //属性读写