手机网站设计标准,哪里设计公司vi,佛山关键词优化服务,自媒体引流推广Linux驱动程序设计的时候偶然发现的ioctl()函数的cmd参数不能为2#xff0c;如果为2,ioctl()函数返回-1#xff0c;网上说就是这样的#xff0c;正常#xff0c;不知道为什么#xff0c;stack overflow上有一个外国学友的建议#xff1a; “In general, you want to comp… Linux驱动程序设计的时候偶然发现的ioctl()函数的cmd参数不能为2如果为2,ioctl()函数返回-1网上说就是这样的正常不知道为什么stack overflow上有一个外国学友的建议 “In general, you want to compose your ioctl commands using the _IO family of macros, with a unique type, to avoid collisions. I suggest reading ioctl-number.txt from the kernel documentation for more information, including a list of most used types” In general, you want to compose your ioctl commands using the _IO family of macros, with a unique type, to avoid collisions. I suggest reading ioctl-number.txt from the kernel documentation for more information, including a list of most used types”
