The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]

FreeBSD/Linux Kernel Cross Reference
sys/sys/ioccom.h

Version: -  FREEBSD  -  FREEBSD-13-STABLE  -  FREEBSD-13-0  -  FREEBSD-12-STABLE  -  FREEBSD-12-0  -  FREEBSD-11-STABLE  -  FREEBSD-11-0  -  FREEBSD-10-STABLE  -  FREEBSD-10-0  -  FREEBSD-9-STABLE  -  FREEBSD-9-0  -  FREEBSD-8-STABLE  -  FREEBSD-8-0  -  FREEBSD-7-STABLE  -  FREEBSD-7-0  -  FREEBSD-6-STABLE  -  FREEBSD-6-0  -  FREEBSD-5-STABLE  -  FREEBSD-5-0  -  FREEBSD-4-STABLE  -  FREEBSD-3-STABLE  -  FREEBSD22  -  l41  -  OPENBSD  -  linux-2.6  -  MK84  -  PLAN9  -  xnu-8792 
SearchContext: -  none  -  3  -  10 

    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. All advertising materials mentioning features or use of this software
   14  *    must display the following acknowledgement:
   15  *      This product includes software developed by the University of
   16  *      California, Berkeley and its contributors.
   17  * 4. Neither the name of the University nor the names of its contributors
   18  *    may be used to endorse or promote products derived from this software
   19  *    without specific prior written permission.
   20  *
   21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   31  * SUCH DAMAGE.
   32  *
   33  *      @(#)ioccom.h    8.2 (Berkeley) 3/28/94
   34  * $FreeBSD: releng/5.0/sys/sys/ioccom.h 94345 2002-04-10 04:53:37Z imp $
   35  */
   36 
   37 #ifndef _SYS_IOCCOM_H_
   38 #define _SYS_IOCCOM_H_
   39 
   40 /*
   41  * Ioctl's have the command encoded in the lower word, and the size of
   42  * any in or out parameters in the upper word.  The high 3 bits of the
   43  * upper word are used to encode the in/out status of the parameter.
   44  */
   45 #define IOCPARM_MASK    0x1fff          /* parameter length, at most 13 bits */
   46 #define IOCPARM_LEN(x)  (((x) >> 16) & IOCPARM_MASK)
   47 #define IOCBASECMD(x)   ((x) & ~(IOCPARM_MASK << 16))
   48 #define IOCGROUP(x)     (((x) >> 8) & 0xff)
   49 
   50 #define IOCPARM_MAX     PAGE_SIZE               /* max size of ioctl, mult. of PAGE_SIZE */
   51 #define IOC_VOID        0x20000000      /* no parameters */
   52 #define IOC_OUT         0x40000000      /* copy out parameters */
   53 #define IOC_IN          0x80000000      /* copy in parameters */
   54 #define IOC_INOUT       (IOC_IN|IOC_OUT)
   55 #define IOC_DIRMASK     0xe0000000      /* mask for IN/OUT/VOID */
   56 
   57 #define _IOC(inout,group,num,len) \
   58         ((unsigned long)(inout | ((len & IOCPARM_MASK) << 16) | ((group) << 8) | (num)))
   59 #define _IO(g,n)        _IOC(IOC_VOID,  (g), (n), 0)
   60 #define _IOR(g,n,t)     _IOC(IOC_OUT,   (g), (n), sizeof(t))
   61 #define _IOW(g,n,t)     _IOC(IOC_IN,    (g), (n), sizeof(t))
   62 /* this should be _IORW, but stdio got there first */
   63 #define _IOWR(g,n,t)    _IOC(IOC_INOUT, (g), (n), sizeof(t))
   64 
   65 #ifndef _KERNEL
   66 
   67 #include <sys/cdefs.h>
   68 
   69 __BEGIN_DECLS
   70 int     ioctl(int, unsigned long, ...);
   71 __END_DECLS
   72 
   73 #endif
   74 
   75 #endif /* !_SYS_IOCCOM_H_ */

Cache object: 748f6f4e6fc197715c2774107e76b301


[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]


This page is part of the FreeBSD/Linux Linux Kernel Cross-Reference, and was automatically generated using a modified version of the LXR engine.