xorg-server-1.4/hw/xfree86/os-support/shared/VTsw_usl.c

   1 /*
   2  * Copyright 1993 by David Wexelblat <dwex@XFree86.org>
   3  *
   4  * Permission to use, copy, modify, distribute, and sell this software and its
   5  * documentation for any purpose is hereby granted without fee, provided that
   6  * the above copyright notice appear in all copies and that both that
   7  * copyright notice and this permission notice appear in supporting
   8  * documentation, and that the name of David Wexelblat not be used in
   9  * advertising or publicity pertaining to distribution of the software without
  10  * specific, written prior permission.  David Wexelblat makes no representations
  11  * about the suitability of this software for any purpose.  It is provided
  12  * "as is" without express or implied warranty.
  13  *
  14  * DAVID WEXELBLAT DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
  15  * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
  16  * EVENT SHALL DAVID WEXELBLAT BE LIABLE FOR ANY SPECIAL, INDIRECT OR
  17  * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
  18  * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
  19  * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
  20  * PERFORMANCE OF THIS SOFTWARE.
  21  *
  22  */
  23
  24 #ifdef HAVE_XORG_CONFIG_H
  25 #include <xorg-config.h>
  26 #endif
  27
  28 #include <X11/X.h>
  29
  30 #include "xf86.h"
  31 #include "xf86Priv.h"
  32 #include "xf86_OSlib.h"
  33
  34 #ifdef OSHEADER
  35 # include OSHEADER
  36 #endif
  37
  38 /*
  39  * Handle the VT-switching interface for OSs that use USL-style ioctl()s
  40  * (the sysv, sco, and linux subdirs).
  41  */
  42
  43 /*
  44  * This function is the signal handler for the VT-switching signal.  It
  45  * is only referenced inside the OS-support layer.
  46  */
  47 void
  48 xf86VTRequest(int sig)
  49 {
  50         signal(sig, (void(*)(int))xf86VTRequest);
  51         xf86Info.vtRequestsPending = TRUE;
  52         return;
  53 }
  54
  55 Bool
  56 xf86VTSwitchPending()
  57 {
  58     return(xf86Info.vtRequestsPending ? TRUE : FALSE);
  59 }
  60
  61 Bool
  62 xf86VTSwitchAway()
  63 {
  64         xf86Info.vtRequestsPending = FALSE;
  65         if (ioctl(xf86Info.consoleFd, VT_RELDISP, 1) < 0)
  66         {
  67                 return(FALSE);
  68         }
  69         else
  70         {
  71 #ifdef OSSWITCHAWAY
  72                 OSSWITCHAWAY;
  73 #endif
  74                 return(TRUE);
  75         }
  76 }
  77
  78 Bool
  79 xf86VTSwitchTo()
  80 {
  81         xf86Info.vtRequestsPending = FALSE;
  82         if (ioctl(xf86Info.consoleFd, VT_RELDISP, VT_ACKACQ) < 0)
  83         {
  84                 return(FALSE);
  85         }
  86         else
  87         {
  88                 return(TRUE);
  89         }
  90 }