Back to index

lightning-sunbird  0.9+nobinonly
ioccom.h
Go to the documentation of this file.
00001 /*-
00002  * Copyright (c) 1982, 1986, 1990, 1993, 1994
00003  *     The Regents of the University of California.  All rights reserved.
00004  *
00005  * Redistribution and use in source and binary forms, with or without
00006  * modification, are permitted provided that the following conditions
00007  * are met:
00008  * 1. Redistributions of source code must retain the above copyright
00009  *    notice, this list of conditions and the following disclaimer.
00010  * 2. Redistributions in binary form must reproduce the above copyright
00011  *    notice, this list of conditions and the following disclaimer in the
00012  *    documentation and/or other materials provided with the distribution.
00013  * [3 Deleted as of 22Jul99, see
00014  *     ftp://ftp.cs.berkeley.edu/pub/4bsd/README.Impt.License.Change
00015  *        for details]
00016  * 4. Neither the name of the University nor the names of its contributors
00017  *    may be used to endorse or promote products derived from this software
00018  *    without specific prior written permission.
00019  *
00020  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
00021  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
00022  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
00023  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
00024  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
00025  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
00026  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
00027  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
00028  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
00029  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
00030  * SUCH DAMAGE.
00031  *
00032  *     @(#)ioccom.h  8.2 (Berkeley) 3/28/94
00033  */
00034 
00035 /* Adapted for GUSI by Matthias Neeracher <neeri@iis.ee.ethz.ch> */
00036 
00037 #ifndef       _SYS_IOCCOM_H_
00038 #define       _SYS_IOCCOM_H_
00039 
00040 /*
00041  * Ioctl's have the command encoded in the lower word, and the size of
00042  * any in or out parameters in the upper word.  The high 3 bits of the
00043  * upper word are used to encode the in/out status of the parameter.
00044  */
00045 #define       IOCPARM_MASK  0x1fff        /* parameter length, at most 13 bits */
00046 #define       IOCPARM_LEN(x)       (((x) >> 16) & IOCPARM_MASK)
00047 #define       IOCBASECMD(x) ((x) & ~(IOCPARM_MASK << 16))
00048 #define       IOCGROUP(x)   (((x) >> 8) & 0xff)
00049 
00050 #define       IOCPARM_MAX   NBPG          /* max size of ioctl, mult. of NBPG */
00051 #define       IOC_VOID      0x20000000    /* no parameters */
00052 #define       IOC_OUT              0x40000000    /* copy out parameters */
00053 #define       IOC_IN        0x80000000    /* copy in parameters */
00054 #define       IOC_INOUT     (IOC_IN|IOC_OUT)
00055 #define       IOC_DIRMASK   0xe0000000    /* mask for IN/OUT/VOID */
00056 
00057 #define       _IOC(inout,group,num,len) \
00058        (inout | ((len & IOCPARM_MASK) << 16) | ((group) << 8) | (num))
00059 #define       _IO(g,n)      _IOC(IOC_VOID,       (g), (n), 0)
00060 #define       _IOR(g,n,t)   _IOC(IOC_OUT, (g), (n), sizeof(t))
00061 #define       _IOW(g,n,t)   _IOC(IOC_IN,  (g), (n), sizeof(t))
00062 /* this should be _IORW, but stdio got there first */
00063 #define       _IOWR(g,n,t)  _IOC(IOC_INOUT,      (g), (n), sizeof(t))
00064 
00065 #endif /* !_SYS_IOCCOM_H_ */