37 lines
1.4 KiB
C
37 lines
1.4 KiB
C
/*
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* Copyright (c) 2016 Jonas 'Sortie' Termansen.
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*
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* sortix/ioctl.h
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* Miscellaneous device control interface.
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*/
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#ifndef INCLUDE_SORTIX_IOCTL_H
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#define INCLUDE_SORTIX_IOCTL_H
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#define __IOCTL_TYPE_EXP 3 /* 2^3 kinds of argument types supported.*/
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#define __IOCTL_TYPE_MASK ((1 << __IOCTL_TYPE_EXP) - 1)
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#define __IOCTL_TYPE_VOID 0
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#define __IOCTL_TYPE_INT 1
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#define __IOCTL_TYPE_LONG 2
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#define __IOCTL_TYPE_PTR 3
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/* 4-7 is unused in case of future expansion. */
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#define __IOCTL(index, type) ((index) << __IOCTL_TYPE_EXP | (type))
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#define __IOCTL_INDEX(value) ((value) >> __IOCTL_TYPE_EXP)
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#define __IOCTL_TYPE(value) ((value) & __IOCTL_TYPE_MASK)
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#define TIOCGWINSZ __IOCTL(1, __IOCTL_TYPE_PTR)
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#endif
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