read 系统调用剖析--file_operations中read/write函数与内核系统调用的关系
在阅读LDD3-第三章-字符设备驱动程序中:structfile_operationsscull_fops={.owner=THIS_MODULE,.llseek=scull_llseek,.read=scull_read,.write=scull_write,.ioctl=scull_ioctl,.open=scull_open,.release=scull_release,};ssize_t(