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| #define | _IO(g, n) _IOC(IOC_VOID, (g), (n), 0) |
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| #define | _IOC(inout, group, num, len) |
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| #define | _IOR(g, n, t) _IOC(IOC_OUT, (g), (n), sizeof(t)) |
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| #define | _IOW(g, n, t) _IOC(IOC_IN, (g), (n), sizeof(t)) |
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| #define | _IOWINT(g, n) _IOC(IOC_VOID, (g), (n), sizeof(int)) |
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| #define | _IOWR(g, n, t) _IOC(IOC_INOUT, (g), (n), sizeof(t)) |
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| #define | IOC_DIRMASK (IOC_VOID|IOC_OUT|IOC_IN) |
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| #define | IOC_IN 0x80000000 /* copy in parameters */ |
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| #define | IOC_INOUT (IOC_IN|IOC_OUT) |
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| #define | IOC_OUT 0x40000000 /* copy out parameters */ |
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| #define | IOC_VOID 0x20000000 /* no parameters */ |
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| #define | IOCBASECMD(x) ((x) & ~(IOCPARM_MASK << 16)) |
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| #define | IOCGROUP(x) (((x) >> 8) & 0xff) |
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| #define | IOCPARM_IVAL(x) ((int)(intptr_t)(void *)*(caddr_t *)(void *)(x)) |
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| #define | IOCPARM_LEN(x) (((x) >> 16) & IOCPARM_MASK) |
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| #define | IOCPARM_MASK ((1 << IOCPARM_SHIFT) - 1) /* parameter length mask */ |
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| #define | IOCPARM_MAX (1 << IOCPARM_SHIFT) /* max size of ioctl */ |
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| #define | IOCPARM_SHIFT 13 /* number of bits for ioctl size */ |
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| #define | NCCS 20 |
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| #define | TIOCGETA _IOR('t', 19, struct termios) /* get termios struct */ |
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| #define | TIOCGWINSZ _IOR('t', 104, struct winsize) /* get window size */ |
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