设备开关表示例 块设备开关表 表项 open close strategy 0 gdopen gdclose gdstrategy 1 gtopen gtclose gtstrategy 字符设备开关表 表项 open close read write ioctl 0 conopen conclose conread conwrite conioctl 1 dzbopen dzbclose dzbread dzbwrite dzbioctl 2 syopen nulldev syread sywrite syioctl 3 nulldev nulldev mmread mmwrite nodev 4 gdopen gdclose gdread gdwrite nodev 5 gtopen gtclose gtread gtwrite nodev 4块 设 备 开 关 表 表项 open close strategy 0 gdopen gdclose gdstrategy 1 gtopen gtclose gtstrategy 字 符 设 备 开 关 表 表项 open close read write ioctl 0 conopen conclose conread conwrite conioctl 1 dzbopen dzbclose dzbread dzbwrite dzbioctl 2 syopen nulldev syread sywrite syioctl 3 nulldev nulldev mmread mmwrite nodev 4 gdopen gdclose gdread gdwrite nodev 5 gtopen gtclose gtread gtwrite nodev 设备开关表示例 4