xserver mesa git update 4 July 2011

1 files changed, 669 insertions, 557 deletions

diff --git a/xorg-server/dix/grabs.c b/xorg-server/dix/grabs.c
index a14181108..85ca9eee0 100644
--- a/xorg-server/dix/grabs.c
+++ b/xorg-server/dix/grabs.c
@@ -1,557 +1,669 @@
-/*

-

-Copyright 1987, 1998  The Open Group

-

-Permission to use, copy, modify, distribute, and sell this software and its

-documentation for any purpose is hereby granted without fee, provided that

-the above copyright notice appear in all copies and that both that

-copyright notice and this permission notice appear in supporting

-documentation.

-

-The above copyright notice and this permission notice shall be included

-in all copies or substantial portions of the Software.

-

-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS

-OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF

-MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.

-IN NO EVENT SHALL THE OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR

-OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,

-ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR

-OTHER DEALINGS IN THE SOFTWARE.

-

-Except as contained in this notice, the name of The Open Group shall

-not be used in advertising or otherwise to promote the sale, use or

-other dealings in this Software without prior written authorization

-from The Open Group.

-

-

-Copyright 1987 by Digital Equipment Corporation, Maynard, Massachusetts,

-

-                        All Rights Reserved

-

-Permission to use, copy, modify, and distribute this software and its 

-documentation for any purpose and without fee is hereby granted, 

-provided that the above copyright notice appear in all copies and that

-both that copyright notice and this permission notice appear in 

-supporting documentation, and that the name of Digital not be

-used in advertising or publicity pertaining to distribution of the

-software without specific, written prior permission.  

-DIGITAL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING

-ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL

-DIGITAL BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR

-ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,

-WHETHER IN AN action OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,

-ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS

-SOFTWARE.

-

-*/

-

-#ifdef HAVE_DIX_CONFIG_H

-#include <dix-config.h>

-#endif

-

-#include <X11/X.h>

-#include "misc.h"

-#include <X11/Xproto.h>

-#include <X11/extensions/XI2.h>

-#include "windowstr.h"

-#include "inputstr.h"

-#include "cursorstr.h"

-#include "dixgrabs.h"

-#include "xace.h"

-#include "exevents.h"

-

-#define BITMASK(i) (((Mask)1) << ((i) & 31))

-#define MASKIDX(i) ((i) >> 5)

-#define MASKWORD(buf, i) buf[MASKIDX(i)]

-#define BITSET(buf, i) MASKWORD(buf, i) |= BITMASK(i)

-#define BITCLEAR(buf, i) MASKWORD(buf, i) &= ~BITMASK(i)

-#define GETBIT(buf, i) (MASKWORD(buf, i) & BITMASK(i))

-

-GrabPtr

-CreateGrab(

-    int client,

-    DeviceIntPtr device,

-    DeviceIntPtr modDevice,

-    WindowPtr window,

-    GrabType grabtype,

-    GrabMask *mask,

-    GrabParameters *param,

-    int type,

-    KeyCode keybut,	/* key or button */

-    WindowPtr confineTo,

-    CursorPtr cursor)

-{

-    GrabPtr grab;

-

-    grab = calloc(1, sizeof(GrabRec));

-    if (!grab)

-	return (GrabPtr)NULL;

-    grab->resource = FakeClientID(client);

-    grab->device = device;

-    grab->window = window;

-    grab->eventMask = mask->core; /* same for XI */

-    grab->deviceMask = 0;

-    grab->ownerEvents = param->ownerEvents;

-    grab->keyboardMode = param->this_device_mode;

-    grab->pointerMode = param->other_devices_mode;

-    grab->modifiersDetail.exact = param->modifiers;

-    grab->modifiersDetail.pMask = NULL;

-    grab->modifierDevice = modDevice;

-    grab->type = type;

-    grab->grabtype = grabtype;

-    grab->detail.exact = keybut;

-    grab->detail.pMask = NULL;

-    grab->confineTo = confineTo;

-    grab->cursor = cursor;

-    grab->next = NULL;

-

-    if (grabtype == GRABTYPE_XI2)

-        memcpy(grab->xi2mask, mask->xi2mask, sizeof(mask->xi2mask));

-    if (cursor)

-	cursor->refcnt++;

-    return grab;

-

-}

-

-static void

-FreeGrab(GrabPtr pGrab)

-{

-    free(pGrab->modifiersDetail.pMask);

-    free(pGrab->detail.pMask);

-

-    if (pGrab->cursor)

-	FreeCursor(pGrab->cursor, (Cursor)0);

-

-    free(pGrab);

-}

-

-int

-DeletePassiveGrab(pointer value, XID id)

-{

-    GrabPtr g, prev;

-    GrabPtr pGrab = (GrabPtr)value;

-

-    /* it is OK if the grab isn't found */

-    prev = 0;

-    for (g = (wPassiveGrabs (pGrab->window)); g; g = g->next)

-    {

-	if (pGrab == g)

-	{

-	    if (prev)

-		prev->next = g->next;

-	    else

-		if (!(pGrab->window->optional->passiveGrabs = g->next))

-		    CheckWindowOptionalNeed (pGrab->window);

-	    break;

-	}

-	prev = g;

-    }

-    FreeGrab(pGrab);

-    return Success;

-}

-

-static Mask *

-DeleteDetailFromMask(Mask *pDetailMask, unsigned int detail)

-{

-    Mask *mask;

-    int i;

-

-    mask = malloc(sizeof(Mask) * MasksPerDetailMask);

-    if (mask)

-    {

-	if (pDetailMask)

-	    for (i = 0; i < MasksPerDetailMask; i++)

-		mask[i]= pDetailMask[i];

-	else

-	    for (i = 0; i < MasksPerDetailMask; i++)

-		mask[i]= ~0L;

-	BITCLEAR(mask, detail);

-    }

-    return mask; 

-}

-

-static Bool

-IsInGrabMask(

-    DetailRec firstDetail,

-    DetailRec secondDetail,

-    unsigned int exception)

-{

-    if (firstDetail.exact == exception)

-    {

-	if (firstDetail.pMask == NULL)

-	    return TRUE;

-	

-	/* (at present) never called with two non-null pMasks */

-	if (secondDetail.exact == exception)

-	    return FALSE;

-

- 	if (GETBIT(firstDetail.pMask, secondDetail.exact))

-	    return TRUE;

-    }

-    

-    return FALSE;

-}

-

-static Bool 

-IdenticalExactDetails(

-    unsigned int firstExact,

-    unsigned int secondExact,

-    unsigned int exception)

-{

-    if ((firstExact == exception) || (secondExact == exception))

-	return FALSE;

-   

-    if (firstExact == secondExact)

-	return TRUE;

-

-    return FALSE;

-}

-

-static Bool 

-DetailSupersedesSecond(

-    DetailRec firstDetail,

-    DetailRec secondDetail,

-    unsigned int exception)

-{

-    if (IsInGrabMask(firstDetail, secondDetail, exception))

-	return TRUE;

-

-    if (IdenticalExactDetails(firstDetail.exact, secondDetail.exact,

-			      exception))

-	return TRUE;

-  

-    return FALSE;

-}

-

-static Bool

-GrabSupersedesSecond(GrabPtr pFirstGrab, GrabPtr pSecondGrab)

-{

-    unsigned int any_modifier = (pFirstGrab->grabtype == GRABTYPE_XI2) ?

-                                (unsigned int)XIAnyModifier :

-                                (unsigned int)AnyModifier;

-    if (!DetailSupersedesSecond(pFirstGrab->modifiersDetail,

-				pSecondGrab->modifiersDetail, 

-				any_modifier))

-	return FALSE;

-

-    if (DetailSupersedesSecond(pFirstGrab->detail,

-			       pSecondGrab->detail, (unsigned int)AnyKey))

-	return TRUE;

- 

-    return FALSE;

-}

-

-/**

- * Compares two grabs and returns TRUE if the first grab matches the second

- * grab. 

- * 

- * A match is when 

- *  - the devices set for the grab are equal (this is optional).

- *  - the event types for both grabs are equal.

- *  - XXX

- *

- * @param ignoreDevice TRUE if the device settings on the grabs are to be

- * ignored.

- * @return TRUE if the grabs match or FALSE otherwise.

- */

-Bool

-GrabMatchesSecond(GrabPtr pFirstGrab, GrabPtr pSecondGrab, Bool ignoreDevice)

-{

-    unsigned int any_modifier = (pFirstGrab->grabtype == GRABTYPE_XI2) ?

-                                (unsigned int)XIAnyModifier :

-                                (unsigned int)AnyModifier;

-

-    if (pFirstGrab->grabtype != pSecondGrab->grabtype)

-        return FALSE;

-

-    if (pFirstGrab->grabtype == GRABTYPE_XI2)

-    {

-        if (pFirstGrab->device == inputInfo.all_devices ||

-            pSecondGrab->device == inputInfo.all_devices)

-        {

-            /* do nothing */

-        } else if (pFirstGrab->device == inputInfo.all_master_devices)

-        {

-            if (pSecondGrab->device != inputInfo.all_master_devices &&

-                !IsMaster(pSecondGrab->device))

-                return FALSE;

-        } else if (pSecondGrab->device == inputInfo.all_master_devices)

-        {

-            if (pFirstGrab->device != inputInfo.all_master_devices &&

-                !IsMaster(pFirstGrab->device))

-                return FALSE;

-        } else if (pSecondGrab->device != pFirstGrab->device)

-            return FALSE;

-    } else if (!ignoreDevice &&

-            ((pFirstGrab->device != pSecondGrab->device) ||

-             (pFirstGrab->modifierDevice != pSecondGrab->modifierDevice)))

-            return FALSE;

-

-    if (pFirstGrab->type != pSecondGrab->type)

-	return FALSE;

-

-    if (GrabSupersedesSecond(pFirstGrab, pSecondGrab) ||

-	GrabSupersedesSecond(pSecondGrab, pFirstGrab))

-	return TRUE;

- 

-    if (DetailSupersedesSecond(pSecondGrab->detail, pFirstGrab->detail,

-			       (unsigned int)AnyKey)

-	&& 

-	DetailSupersedesSecond(pFirstGrab->modifiersDetail,

-			       pSecondGrab->modifiersDetail,

-			       any_modifier))

-	return TRUE;

-

-    if (DetailSupersedesSecond(pFirstGrab->detail, pSecondGrab->detail,

-			       (unsigned int)AnyKey)

-	&& 

-	DetailSupersedesSecond(pSecondGrab->modifiersDetail,

-			       pFirstGrab->modifiersDetail,

-			       any_modifier))

-	return TRUE;

-

-    return FALSE;

-}

-

-static Bool

-GrabsAreIdentical(GrabPtr pFirstGrab, GrabPtr pSecondGrab)

-{

-    unsigned int any_modifier = (pFirstGrab->grabtype == GRABTYPE_XI2) ?

-                                (unsigned int)XIAnyModifier :

-                                (unsigned int)AnyModifier;

-

-    if (pFirstGrab->grabtype != pSecondGrab->grabtype)

-        return FALSE;

-

-    if (pFirstGrab->device != pSecondGrab->device || 

-	(pFirstGrab->modifierDevice != pSecondGrab->modifierDevice) ||

-	(pFirstGrab->type != pSecondGrab->type))

-	return FALSE;

-

-    if (!(DetailSupersedesSecond(pFirstGrab->detail, 

-                               pSecondGrab->detail, 

-                               (unsigned int)AnyKey) &&

-        DetailSupersedesSecond(pSecondGrab->detail,

-                               pFirstGrab->detail,

-                               (unsigned int)AnyKey)))

-        return FALSE;

-

-

-    if (!(DetailSupersedesSecond(pFirstGrab->modifiersDetail, 

-                               pSecondGrab->modifiersDetail, 

-                               any_modifier) &&

-        DetailSupersedesSecond(pSecondGrab->modifiersDetail,

-                               pFirstGrab->modifiersDetail,

-                               any_modifier)))

-        return FALSE;

-

-    return TRUE;

-}

-

-

-/**

- * Prepend the new grab to the list of passive grabs on the window.

- * Any previously existing grab that matches the new grab will be removed.

- * Adding a new grab that would override another client's grab will result in

- * a BadAccess.

- * 

- * @return Success or X error code on failure.

- */

-int

-AddPassiveGrabToList(ClientPtr client, GrabPtr pGrab)

-{

-    GrabPtr grab;

-    Mask access_mode = DixGrabAccess;

-    int rc;

-

-    for (grab = wPassiveGrabs(pGrab->window); grab; grab = grab->next)

-    {

-	if (GrabMatchesSecond(pGrab, grab, FALSE))

-	{

-	    if (CLIENT_BITS(pGrab->resource) != CLIENT_BITS(grab->resource))

-	    {

-		FreeGrab(pGrab);

-		return BadAccess;

-	    }

-	}

-    }

-

-    if (pGrab->keyboardMode == GrabModeSync||pGrab->pointerMode == GrabModeSync)

-	access_mode |= DixFreezeAccess;

-    rc = XaceHook(XACE_DEVICE_ACCESS, client, pGrab->device, access_mode);

-    if (rc != Success)

-	return rc;

-

-    /* Remove all grabs that match the new one exactly */

-    for (grab = wPassiveGrabs(pGrab->window); grab; grab = grab->next)

-    {

-	if (GrabsAreIdentical(pGrab, grab))

-	{

-            DeletePassiveGrabFromList(grab);

-            break;

-	} 

-    }

-

-    if (!pGrab->window->optional && !MakeWindowOptional (pGrab->window))

-    {

-	FreeGrab(pGrab);

-	return BadAlloc;

-    }

-

-    pGrab->next = pGrab->window->optional->passiveGrabs;

-    pGrab->window->optional->passiveGrabs = pGrab;

-    if (AddResource(pGrab->resource, RT_PASSIVEGRAB, (pointer)pGrab))

-	return Success;

-    return BadAlloc;

-}

-

-/* the following is kinda complicated, because we need to be able to back out

- * if any allocation fails

- */

-

-Bool

-DeletePassiveGrabFromList(GrabPtr pMinuendGrab)

-{

-    GrabPtr grab;

-    GrabPtr *deletes, *adds;

-    Mask ***updates, **details;

-    int i, ndels, nadds, nups;

-    Bool ok;

-    unsigned int any_modifier;

-    unsigned int any_key;

-

-#define UPDATE(mask,exact) \

-	if (!(details[nups] = DeleteDetailFromMask(mask, exact))) \

-	  ok = FALSE; \

-	else \

-	  updates[nups++] = &(mask)

-

-    i = 0;

-    for (grab = wPassiveGrabs(pMinuendGrab->window); grab; grab = grab->next)

-	i++;

-    if (!i)

-	return TRUE;

-    deletes = malloc(i * sizeof(GrabPtr));

-    adds = malloc(i * sizeof(GrabPtr));

-    updates = malloc(i * sizeof(Mask **));

-    details = malloc(i * sizeof(Mask *));

-    if (!deletes || !adds || !updates || !details)

-    {

-	free(details);

-	free(updates);

-	free(adds);

-	free(deletes);

-	return FALSE;

-    }

-

-    any_modifier = (pMinuendGrab->grabtype == GRABTYPE_XI2) ?

-                   (unsigned int)XIAnyModifier : (unsigned int)AnyModifier;

-    any_key = (pMinuendGrab->grabtype == GRABTYPE_XI2) ?

-                   (unsigned int)XIAnyKeycode : (unsigned int)AnyKey;

-    ndels = nadds = nups = 0;

-    ok = TRUE;

-    for (grab = wPassiveGrabs(pMinuendGrab->window);

-	 grab && ok;

-	 grab = grab->next)

-    {

-	if ((CLIENT_BITS(grab->resource) != CLIENT_BITS(pMinuendGrab->resource)) ||

-	    !GrabMatchesSecond(grab, pMinuendGrab,

-                               (grab->grabtype == GRABTYPE_CORE)))

-	    continue;

-	if (GrabSupersedesSecond(pMinuendGrab, grab))

-	{

-	    deletes[ndels++] = grab;

-	}

-	else if ((grab->detail.exact == any_key)

-		 && (grab->modifiersDetail.exact != any_modifier))

-	{

-	    UPDATE(grab->detail.pMask, pMinuendGrab->detail.exact);

-	}

-	else if ((grab->modifiersDetail.exact == any_modifier)

-		 && (grab->detail.exact != any_key))

-	{

-	    UPDATE(grab->modifiersDetail.pMask,

-		   pMinuendGrab->modifiersDetail.exact);

-	}

-	else if ((pMinuendGrab->detail.exact != any_key)

-		 && (pMinuendGrab->modifiersDetail.exact != any_modifier))

-	{

-	    GrabPtr pNewGrab;

-            GrabParameters param;

-

-	    UPDATE(grab->detail.pMask, pMinuendGrab->detail.exact);

-

-            memset(&param, 0, sizeof(param));

-            param.ownerEvents = grab->ownerEvents;

-            param.this_device_mode = grab->keyboardMode;

-            param.other_devices_mode = grab->pointerMode;

-            param.modifiers = any_modifier;

-

-	    pNewGrab = CreateGrab(CLIENT_ID(grab->resource), grab->device,

-				  grab->modifierDevice, grab->window,

-                                  grab->grabtype,

-				  (GrabMask*)&grab->eventMask,

-                                  &param, (int)grab->type,

-				  pMinuendGrab->detail.exact,

-				  grab->confineTo, grab->cursor);

-	    if (!pNewGrab)

-		ok = FALSE;

-	    else if (!(pNewGrab->modifiersDetail.pMask =

-		       DeleteDetailFromMask(grab->modifiersDetail.pMask,

-					 pMinuendGrab->modifiersDetail.exact))

-		     ||

-		     (!pNewGrab->window->optional &&

-		      !MakeWindowOptional(pNewGrab->window)))

-	    {

-		FreeGrab(pNewGrab);

-		ok = FALSE;

-	    }

-	    else if (!AddResource(pNewGrab->resource, RT_PASSIVEGRAB,

-				  (pointer)pNewGrab))

-		ok = FALSE;

-	    else

-		adds[nadds++] = pNewGrab;

-	}   

-	else if (pMinuendGrab->detail.exact == any_key)

-	{

-	    UPDATE(grab->modifiersDetail.pMask,

-		   pMinuendGrab->modifiersDetail.exact);

-	}

-	else

-	{

-	    UPDATE(grab->detail.pMask, pMinuendGrab->detail.exact);

-	}

-    }

-

-    if (!ok)

-    {

-	for (i = 0; i < nadds; i++)

-	    FreeResource(adds[i]->resource, RT_NONE);

-	for (i = 0; i < nups; i++)

-	    free(details[i]);

-    }

-    else

-    {

-	for (i = 0; i < ndels; i++)

-	    FreeResource(deletes[i]->resource, RT_NONE);

-	for (i = 0; i < nadds; i++)

-	{

-	    grab = adds[i];

-	    grab->next = grab->window->optional->passiveGrabs;

-	    grab->window->optional->passiveGrabs = grab;

-	}

-	for (i = 0; i < nups; i++)

-	{

-	    free(*updates[i]);

-	    *updates[i] = details[i];

-	}

-    }

-    free(details);

-    free(updates);

-    free(adds);

-    free(deletes);

-    return ok;

-

-#undef UPDATE

-}

+/*
+
+Copyright 1987, 1998  The Open Group
+
+Permission to use, copy, modify, distribute, and sell this software and its
+documentation for any purpose is hereby granted without fee, provided that
+the above copyright notice appear in all copies and that both that
+copyright notice and this permission notice appear in supporting
+documentation.
+
+The above copyright notice and this permission notice shall be included
+in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+IN NO EVENT SHALL THE OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR
+OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+OTHER DEALINGS IN THE SOFTWARE.
+
+Except as contained in this notice, the name of The Open Group shall
+not be used in advertising or otherwise to promote the sale, use or
+other dealings in this Software without prior written authorization
+from The Open Group.
+
+
+Copyright 1987 by Digital Equipment Corporation, Maynard, Massachusetts,
+
+                        All Rights Reserved
+
+Permission to use, copy, modify, and distribute this software and its 
+documentation for any purpose and without fee is hereby granted, 
+provided that the above copyright notice appear in all copies and that
+both that copyright notice and this permission notice appear in 
+supporting documentation, and that the name of Digital not be
+used in advertising or publicity pertaining to distribution of the
+software without specific, written prior permission.  
+DIGITAL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
+ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
+DIGITAL BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
+ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
+WHETHER IN AN action OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
+ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
+SOFTWARE.
+
+*/
+
+#ifdef HAVE_DIX_CONFIG_H
+#include <dix-config.h>
+#endif
+
+#include <X11/X.h>
+#include "misc.h"
+#include <X11/Xproto.h>
+#include <X11/extensions/XI2.h>
+#include "windowstr.h"
+#include "inputstr.h"
+#include "cursorstr.h"
+#include "dixgrabs.h"
+#include "xace.h"
+#include "exevents.h"
+
+#define BITMASK(i) (((Mask)1) << ((i) & 31))
+#define MASKIDX(i) ((i) >> 5)
+#define MASKWORD(buf, i) buf[MASKIDX(i)]
+#define BITSET(buf, i) MASKWORD(buf, i) |= BITMASK(i)
+#define BITCLEAR(buf, i) MASKWORD(buf, i) &= ~BITMASK(i)
+#define GETBIT(buf, i) (MASKWORD(buf, i) & BITMASK(i))
+
+void
+PrintDeviceGrabInfo(DeviceIntPtr dev)
+{
+    ClientPtr client;
+    LocalClientCredRec *lcc;
+    int i, j;
+    GrabInfoPtr devGrab = &dev->deviceGrab;
+    GrabPtr grab = devGrab->grab;
+
+    ErrorF("Active grab 0x%lx (%s) on device '%s' (%d):",
+           (unsigned long) grab->resource,
+           (grab->grabtype == GRABTYPE_XI2) ? "xi2" :
+            ((grab->grabtype == GRABTYPE_CORE) ? "core" : "xi1"),
+           dev->name, dev->id);
+
+    client = clients[CLIENT_ID(grab->resource)];
+    if (client && GetLocalClientCreds(client, &lcc) != -1)
+    {
+        ErrorF("      client pid %ld uid %ld gid %ld\n",
+               (lcc->fieldsSet & LCC_PID_SET) ? (long) lcc->pid : 0,
+               (lcc->fieldsSet & LCC_UID_SET) ? (long) lcc->euid : 0,
+               (lcc->fieldsSet & LCC_GID_SET) ? (long) lcc->egid : 0);
+        FreeLocalClientCreds(lcc);
+    }
+    else
+    {
+        ErrorF("      (no client information available)\n");
+    }
+
+    /* XXX is this even correct? */
+    if (devGrab->sync.other)
+        ErrorF("      grab ID 0x%lx from paired device\n",
+               (unsigned long) devGrab->sync.other->resource);
+
+    ErrorF("      at %ld (from %s grab)%s (device %s, state %d)\n",
+           (unsigned long) devGrab->grabTime.milliseconds,
+           devGrab->fromPassiveGrab ? "passive" : "active",
+           devGrab->implicitGrab ? " (implicit)" : "",
+           devGrab->sync.frozen ? "frozen" : "thawed",
+           devGrab->sync.state);
+
+    if (grab->grabtype == GRABTYPE_CORE)
+    {
+        ErrorF("        core event mask 0x%lx\n",
+               (unsigned long) grab->eventMask);
+    }
+    else if (grab->grabtype == GRABTYPE_XI)
+    {
+        ErrorF("      xi1 event mask 0x%lx\n",
+               devGrab->implicitGrab ? (unsigned long) grab->deviceMask :
+                                       (unsigned long) grab->eventMask);
+    }
+    else if (grab->grabtype == GRABTYPE_XI2)
+    {
+        for (i = 0; i < EMASKSIZE; i++)
+        {
+            int print;
+            print = 0;
+            for (j = 0; j < XI2MASKSIZE; j++)
+            {
+                if (grab->xi2mask[i][j])
+                {
+                    print = 1;
+                    break;
+                }
+            }
+            if (!print)
+                continue;
+            ErrorF("      xi2 event mask for device %d: 0x", dev->id);
+            for (j = 0; j < XI2MASKSIZE; j++)
+                ErrorF("%x", grab->xi2mask[i][j]);
+            ErrorF("\n");
+        }
+    }
+
+    if (devGrab->fromPassiveGrab)
+    {
+        ErrorF("      passive grab type %d, detail 0x%x, "
+               "activating key %d\n", grab->type, grab->detail.exact,
+               devGrab->activatingKey);
+    }
+
+    ErrorF("      owner-events %s, kb %d ptr %d, confine %lx, cursor 0x%lx\n",
+           grab->ownerEvents ? "true" : "false",
+           grab->keyboardMode, grab->pointerMode,
+           grab->confineTo ? (unsigned long) grab->confineTo->drawable.id : 0,
+           grab->cursor ? (unsigned long) grab->cursor->id : 0);
+}
+
+void
+UngrabAllDevices(Bool kill_client)
+{
+    DeviceIntPtr dev;
+    ClientPtr client;
+
+    ErrorF("Ungrabbing all devices%s; grabs listed below:\n",
+           kill_client ? " and killing their owners" : "");
+
+    for (dev = inputInfo.devices; dev; dev = dev->next)
+    {
+        if (!dev->deviceGrab.grab)
+            continue;
+        PrintDeviceGrabInfo(dev);
+        client = clients[CLIENT_ID(dev->deviceGrab.grab->resource)];
+        if (!client || client->clientGone)
+            dev->deviceGrab.DeactivateGrab(dev);
+        CloseDownClient(client);
+    }
+
+    ErrorF("End list of ungrabbed devices\n");
+}
+
+GrabPtr
+CreateGrab(
+    int client,
+    DeviceIntPtr device,
+    DeviceIntPtr modDevice,
+    WindowPtr window,
+    GrabType grabtype,
+    GrabMask *mask,
+    GrabParameters *param,
+    int type,
+    KeyCode keybut,	/* key or button */
+    WindowPtr confineTo,
+    CursorPtr cursor)
+{
+    GrabPtr grab;
+
+    grab = calloc(1, sizeof(GrabRec));
+    if (!grab)
+	return (GrabPtr)NULL;
+    grab->resource = FakeClientID(client);
+    grab->device = device;
+    grab->window = window;
+    grab->eventMask = mask->core; /* same for XI */
+    grab->deviceMask = 0;
+    grab->ownerEvents = param->ownerEvents;
+    grab->keyboardMode = param->this_device_mode;
+    grab->pointerMode = param->other_devices_mode;
+    grab->modifiersDetail.exact = param->modifiers;
+    grab->modifiersDetail.pMask = NULL;
+    grab->modifierDevice = modDevice;
+    grab->type = type;
+    grab->grabtype = grabtype;
+    grab->detail.exact = keybut;
+    grab->detail.pMask = NULL;
+    grab->confineTo = confineTo;
+    grab->cursor = cursor;
+    grab->next = NULL;
+
+    if (grabtype == GRABTYPE_XI2)
+        memcpy(grab->xi2mask, mask->xi2mask, sizeof(mask->xi2mask));
+    if (cursor)
+	cursor->refcnt++;
+    return grab;
+
+}
+
+static void
+FreeGrab(GrabPtr pGrab)
+{
+    free(pGrab->modifiersDetail.pMask);
+    free(pGrab->detail.pMask);
+
+    if (pGrab->cursor)
+	FreeCursor(pGrab->cursor, (Cursor)0);
+
+    free(pGrab);
+}
+
+int
+DeletePassiveGrab(pointer value, XID id)
+{
+    GrabPtr g, prev;
+    GrabPtr pGrab = (GrabPtr)value;
+
+    /* it is OK if the grab isn't found */
+    prev = 0;
+    for (g = (wPassiveGrabs (pGrab->window)); g; g = g->next)
+    {
+	if (pGrab == g)
+	{
+	    if (prev)
+		prev->next = g->next;
+	    else
+		if (!(pGrab->window->optional->passiveGrabs = g->next))
+		    CheckWindowOptionalNeed (pGrab->window);
+	    break;
+	}
+	prev = g;
+    }
+    FreeGrab(pGrab);
+    return Success;
+}
+
+static Mask *
+DeleteDetailFromMask(Mask *pDetailMask, unsigned int detail)
+{
+    Mask *mask;
+    int i;
+
+    mask = malloc(sizeof(Mask) * MasksPerDetailMask);
+    if (mask)
+    {
+	if (pDetailMask)
+	    for (i = 0; i < MasksPerDetailMask; i++)
+		mask[i]= pDetailMask[i];
+	else
+	    for (i = 0; i < MasksPerDetailMask; i++)
+		mask[i]= ~0L;
+	BITCLEAR(mask, detail);
+    }
+    return mask; 
+}
+
+static Bool
+IsInGrabMask(
+    DetailRec firstDetail,
+    DetailRec secondDetail,
+    unsigned int exception)
+{
+    if (firstDetail.exact == exception)
+    {
+	if (firstDetail.pMask == NULL)
+	    return TRUE;
+	
+	/* (at present) never called with two non-null pMasks */
+	if (secondDetail.exact == exception)
+	    return FALSE;
+
+ 	if (GETBIT(firstDetail.pMask, secondDetail.exact))
+	    return TRUE;
+    }
+    
+    return FALSE;
+}
+
+static Bool 
+IdenticalExactDetails(
+    unsigned int firstExact,
+    unsigned int secondExact,
+    unsigned int exception)
+{
+    if ((firstExact == exception) || (secondExact == exception))
+	return FALSE;
+   
+    if (firstExact == secondExact)
+	return TRUE;
+
+    return FALSE;
+}
+
+static Bool 
+DetailSupersedesSecond(
+    DetailRec firstDetail,
+    DetailRec secondDetail,
+    unsigned int exception)
+{
+    if (IsInGrabMask(firstDetail, secondDetail, exception))
+	return TRUE;
+
+    if (IdenticalExactDetails(firstDetail.exact, secondDetail.exact,
+			      exception))
+	return TRUE;
+  
+    return FALSE;
+}
+
+static Bool
+GrabSupersedesSecond(GrabPtr pFirstGrab, GrabPtr pSecondGrab)
+{
+    unsigned int any_modifier = (pFirstGrab->grabtype == GRABTYPE_XI2) ?
+                                (unsigned int)XIAnyModifier :
+                                (unsigned int)AnyModifier;
+    if (!DetailSupersedesSecond(pFirstGrab->modifiersDetail,
+				pSecondGrab->modifiersDetail, 
+				any_modifier))
+	return FALSE;
+
+    if (DetailSupersedesSecond(pFirstGrab->detail,
+			       pSecondGrab->detail, (unsigned int)AnyKey))
+	return TRUE;
+ 
+    return FALSE;
+}
+
+/**
+ * Compares two grabs and returns TRUE if the first grab matches the second
+ * grab. 
+ * 
+ * A match is when 
+ *  - the devices set for the grab are equal (this is optional).
+ *  - the event types for both grabs are equal.
+ *  - XXX
+ *
+ * @param ignoreDevice TRUE if the device settings on the grabs are to be
+ * ignored.
+ * @return TRUE if the grabs match or FALSE otherwise.
+ */
+Bool
+GrabMatchesSecond(GrabPtr pFirstGrab, GrabPtr pSecondGrab, Bool ignoreDevice)
+{
+    unsigned int any_modifier = (pFirstGrab->grabtype == GRABTYPE_XI2) ?
+                                (unsigned int)XIAnyModifier :
+                                (unsigned int)AnyModifier;
+
+    if (pFirstGrab->grabtype != pSecondGrab->grabtype)
+        return FALSE;
+
+    if (pFirstGrab->grabtype == GRABTYPE_XI2)
+    {
+        if (pFirstGrab->device == inputInfo.all_devices ||
+            pSecondGrab->device == inputInfo.all_devices)
+        {
+            /* do nothing */
+        } else if (pFirstGrab->device == inputInfo.all_master_devices)
+        {
+            if (pSecondGrab->device != inputInfo.all_master_devices &&
+                !IsMaster(pSecondGrab->device))
+                return FALSE;
+        } else if (pSecondGrab->device == inputInfo.all_master_devices)
+        {
+            if (pFirstGrab->device != inputInfo.all_master_devices &&
+                !IsMaster(pFirstGrab->device))
+                return FALSE;
+        } else if (pSecondGrab->device != pFirstGrab->device)
+            return FALSE;
+    } else if (!ignoreDevice &&
+            ((pFirstGrab->device != pSecondGrab->device) ||
+             (pFirstGrab->modifierDevice != pSecondGrab->modifierDevice)))
+            return FALSE;
+
+    if (pFirstGrab->type != pSecondGrab->type)
+	return FALSE;
+
+    if (GrabSupersedesSecond(pFirstGrab, pSecondGrab) ||
+	GrabSupersedesSecond(pSecondGrab, pFirstGrab))
+	return TRUE;
+ 
+    if (DetailSupersedesSecond(pSecondGrab->detail, pFirstGrab->detail,
+			       (unsigned int)AnyKey)
+	&& 
+	DetailSupersedesSecond(pFirstGrab->modifiersDetail,
+			       pSecondGrab->modifiersDetail,
+			       any_modifier))
+	return TRUE;
+
+    if (DetailSupersedesSecond(pFirstGrab->detail, pSecondGrab->detail,
+			       (unsigned int)AnyKey)
+	&& 
+	DetailSupersedesSecond(pSecondGrab->modifiersDetail,
+			       pFirstGrab->modifiersDetail,
+			       any_modifier))
+	return TRUE;
+
+    return FALSE;
+}
+
+static Bool
+GrabsAreIdentical(GrabPtr pFirstGrab, GrabPtr pSecondGrab)
+{
+    unsigned int any_modifier = (pFirstGrab->grabtype == GRABTYPE_XI2) ?
+                                (unsigned int)XIAnyModifier :
+                                (unsigned int)AnyModifier;
+
+    if (pFirstGrab->grabtype != pSecondGrab->grabtype)
+        return FALSE;
+
+    if (pFirstGrab->device != pSecondGrab->device || 
+	(pFirstGrab->modifierDevice != pSecondGrab->modifierDevice) ||
+	(pFirstGrab->type != pSecondGrab->type))
+	return FALSE;
+
+    if (!(DetailSupersedesSecond(pFirstGrab->detail, 
+                               pSecondGrab->detail, 
+                               (unsigned int)AnyKey) &&
+        DetailSupersedesSecond(pSecondGrab->detail,
+                               pFirstGrab->detail,
+                               (unsigned int)AnyKey)))
+        return FALSE;
+
+
+    if (!(DetailSupersedesSecond(pFirstGrab->modifiersDetail, 
+                               pSecondGrab->modifiersDetail, 
+                               any_modifier) &&
+        DetailSupersedesSecond(pSecondGrab->modifiersDetail,
+                               pFirstGrab->modifiersDetail,
+                               any_modifier)))
+        return FALSE;
+
+    return TRUE;
+}
+
+
+/**
+ * Prepend the new grab to the list of passive grabs on the window.
+ * Any previously existing grab that matches the new grab will be removed.
+ * Adding a new grab that would override another client's grab will result in
+ * a BadAccess.
+ * 
+ * @return Success or X error code on failure.
+ */
+int
+AddPassiveGrabToList(ClientPtr client, GrabPtr pGrab)
+{
+    GrabPtr grab;
+    Mask access_mode = DixGrabAccess;
+    int rc;
+
+    for (grab = wPassiveGrabs(pGrab->window); grab; grab = grab->next)
+    {
+	if (GrabMatchesSecond(pGrab, grab, FALSE))
+	{
+	    if (CLIENT_BITS(pGrab->resource) != CLIENT_BITS(grab->resource))
+	    {
+		FreeGrab(pGrab);
+		return BadAccess;
+	    }
+	}
+    }
+
+    if (pGrab->keyboardMode == GrabModeSync||pGrab->pointerMode == GrabModeSync)
+	access_mode |= DixFreezeAccess;
+    rc = XaceHook(XACE_DEVICE_ACCESS, client, pGrab->device, access_mode);
+    if (rc != Success)
+	return rc;
+
+    /* Remove all grabs that match the new one exactly */
+    for (grab = wPassiveGrabs(pGrab->window); grab; grab = grab->next)
+    {
+	if (GrabsAreIdentical(pGrab, grab))
+	{
+            DeletePassiveGrabFromList(grab);
+            break;
+	} 
+    }
+
+    if (!pGrab->window->optional && !MakeWindowOptional (pGrab->window))
+    {
+	FreeGrab(pGrab);
+	return BadAlloc;
+    }
+
+    pGrab->next = pGrab->window->optional->passiveGrabs;
+    pGrab->window->optional->passiveGrabs = pGrab;
+    if (AddResource(pGrab->resource, RT_PASSIVEGRAB, (pointer)pGrab))
+	return Success;
+    return BadAlloc;
+}
+
+/* the following is kinda complicated, because we need to be able to back out
+ * if any allocation fails
+ */
+
+Bool
+DeletePassiveGrabFromList(GrabPtr pMinuendGrab)
+{
+    GrabPtr grab;
+    GrabPtr *deletes, *adds;
+    Mask ***updates, **details;
+    int i, ndels, nadds, nups;
+    Bool ok;
+    unsigned int any_modifier;
+    unsigned int any_key;
+
+#define UPDATE(mask,exact) \
+	if (!(details[nups] = DeleteDetailFromMask(mask, exact))) \
+	  ok = FALSE; \
+	else \
+	  updates[nups++] = &(mask)
+
+    i = 0;
+    for (grab = wPassiveGrabs(pMinuendGrab->window); grab; grab = grab->next)
+	i++;
+    if (!i)
+	return TRUE;
+    deletes = malloc(i * sizeof(GrabPtr));
+    adds = malloc(i * sizeof(GrabPtr));
+    updates = malloc(i * sizeof(Mask **));
+    details = malloc(i * sizeof(Mask *));
+    if (!deletes || !adds || !updates || !details)
+    {
+	free(details);
+	free(updates);
+	free(adds);
+	free(deletes);
+	return FALSE;
+    }
+
+    any_modifier = (pMinuendGrab->grabtype == GRABTYPE_XI2) ?
+                   (unsigned int)XIAnyModifier : (unsigned int)AnyModifier;
+    any_key = (pMinuendGrab->grabtype == GRABTYPE_XI2) ?
+                   (unsigned int)XIAnyKeycode : (unsigned int)AnyKey;
+    ndels = nadds = nups = 0;
+    ok = TRUE;
+    for (grab = wPassiveGrabs(pMinuendGrab->window);
+	 grab && ok;
+	 grab = grab->next)
+    {
+	if ((CLIENT_BITS(grab->resource) != CLIENT_BITS(pMinuendGrab->resource)) ||
+	    !GrabMatchesSecond(grab, pMinuendGrab,
+                               (grab->grabtype == GRABTYPE_CORE)))
+	    continue;
+	if (GrabSupersedesSecond(pMinuendGrab, grab))
+	{
+	    deletes[ndels++] = grab;
+	}
+	else if ((grab->detail.exact == any_key)
+		 && (grab->modifiersDetail.exact != any_modifier))
+	{
+	    UPDATE(grab->detail.pMask, pMinuendGrab->detail.exact);
+	}
+	else if ((grab->modifiersDetail.exact == any_modifier)
+		 && (grab->detail.exact != any_key))
+	{
+	    UPDATE(grab->modifiersDetail.pMask,
+		   pMinuendGrab->modifiersDetail.exact);
+	}
+	else if ((pMinuendGrab->detail.exact != any_key)
+		 && (pMinuendGrab->modifiersDetail.exact != any_modifier))
+	{
+	    GrabPtr pNewGrab;
+            GrabParameters param;
+
+	    UPDATE(grab->detail.pMask, pMinuendGrab->detail.exact);
+
+            memset(&param, 0, sizeof(param));
+            param.ownerEvents = grab->ownerEvents;
+            param.this_device_mode = grab->keyboardMode;
+            param.other_devices_mode = grab->pointerMode;
+            param.modifiers = any_modifier;
+
+	    pNewGrab = CreateGrab(CLIENT_ID(grab->resource), grab->device,
+				  grab->modifierDevice, grab->window,
+                                  grab->grabtype,
+				  (GrabMask*)&grab->eventMask,
+                                  &param, (int)grab->type,
+				  pMinuendGrab->detail.exact,
+				  grab->confineTo, grab->cursor);
+	    if (!pNewGrab)
+		ok = FALSE;
+	    else if (!(pNewGrab->modifiersDetail.pMask =
+		       DeleteDetailFromMask(grab->modifiersDetail.pMask,
+					 pMinuendGrab->modifiersDetail.exact))
+		     ||
+		     (!pNewGrab->window->optional &&
+		      !MakeWindowOptional(pNewGrab->window)))
+	    {
+		FreeGrab(pNewGrab);
+		ok = FALSE;
+	    }
+	    else if (!AddResource(pNewGrab->resource, RT_PASSIVEGRAB,
+				  (pointer)pNewGrab))
+		ok = FALSE;
+	    else
+		adds[nadds++] = pNewGrab;
+	}   
+	else if (pMinuendGrab->detail.exact == any_key)
+	{
+	    UPDATE(grab->modifiersDetail.pMask,
+		   pMinuendGrab->modifiersDetail.exact);
+	}
+	else
+	{
+	    UPDATE(grab->detail.pMask, pMinuendGrab->detail.exact);
+	}
+    }
+
+    if (!ok)
+    {
+	for (i = 0; i < nadds; i++)
+	    FreeResource(adds[i]->resource, RT_NONE);
+	for (i = 0; i < nups; i++)
+	    free(details[i]);
+    }
+    else
+    {
+	for (i = 0; i < ndels; i++)
+	    FreeResource(deletes[i]->resource, RT_NONE);
+	for (i = 0; i < nadds; i++)
+	{
+	    grab = adds[i];
+	    grab->next = grab->window->optional->passiveGrabs;
+	    grab->window->optional->passiveGrabs = grab;
+	}
+	for (i = 0; i < nups; i++)
+	{
+	    free(*updates[i]);
+	    *updates[i] = details[i];
+	}
+    }
+    free(details);
+    free(updates);
+    free(adds);
+    free(deletes);
+    return ok;
+
+#undef UPDATE
+}