xorg-server-1.4/hw/xfree86/os-support/usl/usl_vtsw.c

   1 /*
   2  * Copyright 2005 by Kean Johnston <jkj@sco.com>
   3  * Copyright 1993 by David Wexelblat <dwex@goblin.org>
   4  * Copyright 1993 by David McCullough <davidm@stallion.oz.au>
   5  *
   6  * Permission to use, copy, modify, distribute, and sell this software and its
   7  * documentation for any purpose is hereby granted without fee, provided that
   8  * the above copyright notice appear in all copies and that both that
   9  * copyright notice and this permission notice appear in supporting
  10  * documentation, and that the name of David Wexelblat not be used in
  11  * advertising or publicity pertaining to distribution of the software without
  12  * specific, written prior permission.  David Wexelblat makes no representations
  13  * about the suitability of this software for any purpose.  It is provided
  14  * "as is" without express or implied warranty.
  15  *
  16  * DAVID WEXELBLAT DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
  17  * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
  18  * EVENT SHALL DAVID WEXELBLAT BE LIABLE FOR ANY SPECIAL, INDIRECT OR
  19  * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
  20  * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
  21  * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
  22  * PERFORMANCE OF THIS SOFTWARE.
  23  *
  24  */
  25
  26 #include "X.h"
  27
  28 #include "xf86.h"
  29 #include "xf86Priv.h"
  30 #include "xf86_OSlib.h"
  31
  32 /*
  33  * Handle the VT-switching interface for SCO UnixWare / OpenServer 6
  34  */
  35
  36 /*
  37  * This function is the signal handler for the VT-switching signal.  It
  38  * is only referenced inside the OS-support layer. NOTE: we do NOT need
  39  * to re-arm the signal here, since we used sigaction() to set the signal
  40  * disposition in usl_init.c. If we had used signal(), we would need to
  41  * re-arm the signal here. All we need to do now is record the fact that
  42  * we got the signal. XFree86 handles the rest.
  43  */
  44 void
  45 xf86VTRequest(int sig)
  46 {
  47   xf86Info.vtRequestsPending = TRUE;
  48   return;
  49 }
  50
  51 Bool
  52 xf86VTSwitchPending(void)
  53 {
  54   return(xf86Info.vtRequestsPending ? TRUE : FALSE);
  55 }
  56
  57 static int usl_ledstatus = -1;
  58 static unsigned int usl_ledstate = 0;
  59
  60 Bool
  61 xf86VTSwitchAway(void)
  62 {
  63   usl_ledstatus = ioctl(xf86Info.consoleFd, KDGETLED, &usl_ledstate);
  64
  65   xf86Info.vtRequestsPending = FALSE;
  66   if (ioctl(xf86Info.consoleFd, VT_RELDISP, 1) < 0) {
  67     return(FALSE);
  68   } else {
  69     return(TRUE);
  70   }
  71 }
  72
  73 Bool
  74 xf86VTSwitchTo(void)
  75 {
  76   xf86Info.vtRequestsPending = FALSE;
  77   if (ioctl(xf86Info.consoleFd, VT_RELDISP, VT_ACKACQ) < 0) {
  78     return(FALSE);
  79   } else {
  80     if (usl_ledstatus >= 0) {
  81       ioctl (xf86Info.consoleFd, KDSETLED, usl_ledstate);
  82     }
  83     usl_ledstatus = -1;
  84
  85     /*
  86      * Convince the console driver this screen is in graphics mode,
  87      * otherwise it assumes it can do more to the screen than it should.
  88      */
  89     if (ioctl(xf86Info.consoleFd, KDSETMODE, KD_GRAPHICS) < 0) {
  90         ErrorF("Failed to set graphics mode (%s)\n", strerror(errno));
  91     }
  92
  93     return TRUE;
  94   }
  95 }