Return to ioccom.h CVS log

Up to [local] / prex-old / include / sys

Annotation of prex-old/include/sys/ioccom.h, Revision 1.1.1.1

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_ */