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- // Shamelessly copy-pasted from musl
- #define _IOC(a,b,c,d) ( ((a)<<30) | ((b)<<8) | (c) | ((d)<<16) )
- #define _IOC_NONE 0U
- #define _IOC_WRITE 1U
- #define _IOC_READ 2U
- #define _IO(a,b) _IOC(_IOC_NONE,(a),(b),0)
- #define _IOW(a,b,c) _IOC(_IOC_WRITE,(a),(b),sizeof(c))
- #define _IOR(a,b,c) _IOC(_IOC_READ,(a),(b),sizeof(c))
- #define _IOWR(a,b,c) _IOC(_IOC_READ|_IOC_WRITE,(a),(b),sizeof(c))
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