Annotation of prex-old/include/sys/ioccom.h, Revision 1.1
1.1 ! nbrk 1: /*-
! 2: * Copyright (c) 1982, 1986, 1990, 1993, 1994
! 3: * The Regents of the University of California. All rights reserved.
! 4: *
! 5: * Redistribution and use in source and binary forms, with or without
! 6: * modification, are permitted provided that the following conditions
! 7: * are met:
! 8: * 1. Redistributions of source code must retain the above copyright
! 9: * notice, this list of conditions and the following disclaimer.
! 10: * 2. Redistributions in binary form must reproduce the above copyright
! 11: * notice, this list of conditions and the following disclaimer in the
! 12: * documentation and/or other materials provided with the distribution.
! 13: * 3. Neither the name of the University nor the names of its contributors
! 14: * may be used to endorse or promote products derived from this software
! 15: * without specific prior written permission.
! 16: *
! 17: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
! 18: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
! 19: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
! 20: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
! 21: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
! 22: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
! 23: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
! 24: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
! 25: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
! 26: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
! 27: * SUCH DAMAGE.
! 28: *
! 29: * @(#)ioccom.h 8.3 (Berkeley) 1/9/95
! 30: */
! 31:
! 32: #ifndef _SYS_IOCCOM_H_
! 33: #define _SYS_IOCCOM_H_
! 34:
! 35: /*
! 36: * Ioctl's have the command encoded in the lower word, and the size of
! 37: * any in or out parameters in the upper word. The high 3 bits of the
! 38: * upper word are used to encode the in/out status of the parameter.
! 39: */
! 40: #define IOCPARM_MASK 0x1fff /* parameter length, at most 13 bits */
! 41: #define IOCPARM_LEN(x) (((x) >> 16) & IOCPARM_MASK)
! 42: #define IOCBASECMD(x) ((x) & ~(IOCPARM_MASK << 16))
! 43: #define IOCGROUP(x) (((x) >> 8) & 0xff)
! 44:
! 45: #define IOCPARM_MAX 256
! 46:
! 47: #define IOC_VOID 0x20000000 /* no parameters */
! 48: #define IOC_OUT 0x40000000 /* copy out parameters */
! 49: #define IOC_IN 0x80000000U /* copy in parameters */
! 50: #define IOC_INOUT (IOC_IN|IOC_OUT)
! 51: #define IOC_DIRMASK 0xe0000000
! 52:
! 53: #define _IOC(inout,group,num,len) \
! 54: (int)(inout | ((len & IOCPARM_MASK) << 16) | ((group) << 8) | (num))
! 55: #define _IO(g,n) _IOC(IOC_VOID, (g), (n), 0)
! 56: #define _IOR(g,n,t) _IOC(IOC_OUT, (g), (n), sizeof(t))
! 57: #define _IOW(g,n,t) _IOC(IOC_IN, (g), (n), sizeof(t))
! 58: /* this should be _IORW, but stdio got there first */
! 59: #define _IOWR(g,n,t) _IOC(IOC_INOUT, (g), (n), sizeof(t))
! 60:
! 61: #endif /* !_SYS_IOCCOM_H_ */
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