winsup/cygwin/include/sys/ioctl.h

   1 /* sys/ioctl.h
   2
   3 This file is part of Cygwin.
   4
   5 This software is a copyrighted work licensed under the terms of the
   6 Cygwin license.  Please consult the file "CYGWIN_LICENSE" for
   7 details. */
   8
   9 /* sys/ioctl.h */
  10
  11 #ifndef _SYS_IOCTL_H
  12 #define _SYS_IOCTL_H
  13
  14 #include <sys/cdefs.h>
  15 #include <sys/termios.h>
  16
  17 __BEGIN_DECLS
  18
  19 /* /dev/windows ioctls */
  20
  21 #define WINDOWS_POST    0       /* Set write() behavior to PostMessage() */
  22 #define WINDOWS_SEND    1       /* Set write() behavior to SendMessage() */
  23 #define WINDOWS_HWND    2       /* Set hWnd for read() calls */
  24
  25 /* Some standard linux defines */
  26
  27 #define _IOC_NRBITS     8
  28 #define _IOC_TYPEBITS   8
  29 #define _IOC_SIZEBITS   14
  30 #define _IOC_DIRBITS    2
  31
  32 #define _IOC_NRMASK     ((1 << _IOC_NRBITS)-1)
  33 #define _IOC_TYPEMASK   ((1 << _IOC_TYPEBITS)-1)
  34 #define _IOC_SIZEMASK   ((1 << _IOC_SIZEBITS)-1)
  35 #define _IOC_DIRMASK    ((1 << _IOC_DIRBITS)-1)
  36
  37 #define _IOC_NRSHIFT    0
  38 #define _IOC_TYPESHIFT  (_IOC_NRSHIFT+_IOC_NRBITS)
  39 #define _IOC_SIZESHIFT  (_IOC_TYPESHIFT+_IOC_TYPEBITS)
  40 #define _IOC_DIRSHIFT   (_IOC_SIZESHIFT+_IOC_SIZEBITS)
  41
  42 #define _IOC_NONE       0U
  43 #define _IOC_WRITE      1U
  44 #define _IOC_READ       2U
  45
  46 #define _IOC(dir,type,nr,size) \
  47   (((dir)       << _IOC_DIRSHIFT) | \
  48     +   ((type) << _IOC_TYPESHIFT) | \
  49     +   ((nr)   << _IOC_NRSHIFT) | \
  50     +   ((size) << _IOC_SIZESHIFT))
  51
  52 #define _LINUX_IO(type,nr)              _IOC(_IOC_NONE,(type),(nr),0)
  53 #define _LINUX_IOR(type,nr,size)        _IOC(_IOC_READ,(type),(nr),sizeof(size))
  54 #define _LINUX_IOW(type,nr,size)        _IOC(_IOC_WRITE,(type),(nr),sizeof(size))
  55 #define _LINUX_IOWR(type,nr,size)       _IOC(_IOC_READ|_IOC_WRITE,(type),(nr),sizeof(size))
  56
  57 #ifdef __USE_LINUX_IOCTL_DEFS
  58 # define _IO    _LINUX_IO
  59 # define _IOR   _LINUX_IOR
  60 # define _IOW   _LINUX_IOW
  61 # define _IOWR  _LINUX_IOWR
  62 #endif /*__USE_LINUX_IOCTL_DEFS */
  63
  64 int ioctl (int __fd, int __cmd, ...);
  65
  66 __END_DECLS
  67 #endif