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42 lines
1.5 KiB
C
42 lines
1.5 KiB
C
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/*******************************************************************************
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Copyright(C) Jonas 'Sortie' Termansen 2016.
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This file is part of Sortix.
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Sortix is free software: you can redistribute it and/or modify it under the
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terms of the GNU General Public License as published by the Free Software
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Foundation, either version 3 of the License, or (at your option) any later
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version.
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Sortix is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
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details.
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You should have received a copy of the GNU General Public License along with
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Sortix. If not, see <http://www.gnu.org/licenses/>.
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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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