[PATCH v2] Also dump passive grabs on XF86LogGrabInfo

[Michael Stapelberg]

---
 dix/window.c                    | 110 ++++++++++++++++++++++++++++++++++++++++
 hw/xfree86/dixmods/xkbPrivate.c |   2 +
 include/window.h                |   1 +
 3 files changed, 113 insertions(+)

diff --git a/dix/window.c b/dix/window.c
index 69b5a7c..af4a3d7 100644
--- a/dix/window.c
+++ b/dix/window.c
@@ -127,6 +127,7 @@ Equipment Corporation.
 #include "compint.h"
 #endif
 #include "selection.h"
+#include "inpututils.h"
 
 #include "privates.h"
 #include "xace.h"
@@ -272,6 +273,115 @@ log_window_info(WindowPtr pWin, int depth)
     ErrorF("\n");
 }
 
+static const char*
+grab_grabtype_to_text(GrabPtr pGrab)
+{
+    switch (pGrab->grabtype) {
+        case XI2:
+            return "xi2";
+        case CORE:
+            return "core";
+        default:
+            return "xi1";
+    }
+}
+
+static void
+log_grab_info(void *value, XID id, void *cdata)
+{
+    int i, j;
+    GrabPtr pGrab = (GrabPtr)value;
+
+    ErrorF("  grab 0x%lx (%s), type '%s' on window 0x%lx\n",
+           (unsigned long) pGrab->resource,
+           grab_grabtype_to_text(pGrab),
+           (pGrab->type == ButtonPress ? "ButtonPress" : "KeyPress"),
+           (unsigned long) pGrab->window->drawable.id,
+           pGrab->device->id);
+    ErrorF("    detail %d (mask %lu), modifiersDetail %d (mask %lu)\n",
+           pGrab->detail.exact,
+           pGrab->detail.pMask ? (unsigned long) *(pGrab->detail.pMask) : 0,
+           pGrab->modifiersDetail.exact,
+           pGrab->modifiersDetail.pMask ?
+           (unsigned long) *(pGrab->modifiersDetail.pMask) :
+           (unsigned long) 0);
+    ErrorF("    device '%s' (%d), modifierDevice '%s' (%d)\n",
+           pGrab->device->name, pGrab->device->id,
+           pGrab->modifierDevice->name, pGrab->modifierDevice->id);
+    if (pGrab->grabtype == CORE) {
+        ErrorF("    core event mask 0x%lx\n",
+               (unsigned long) pGrab->eventMask);
+    }
+    else if (pGrab->grabtype == XI) {
+        ErrorF("    xi1 event mask 0x%lx\n",
+               (unsigned long) pGrab->eventMask);
+    }
+    else if (pGrab->grabtype == XI2) {
+        for (i = 0; i < xi2mask_num_masks(pGrab->xi2mask); i++) {
+            const unsigned char *mask;
+            int print;
+
+            print = 0;
+            for (j = 0; j < XI2MASKSIZE; j++) {
+                mask = xi2mask_get_one_mask(pGrab->xi2mask, i);
+                if (mask[j]) {
+                    print = 1;
+                    break;
+                }
+            }
+            if (!print)
+                continue;
+            ErrorF("      xi2 event mask 0x");
+            for (j = 0; j < xi2mask_mask_size(pGrab->xi2mask); j++)
+                ErrorF("%x ", mask[j]);
+            ErrorF("\n");
+        }
+    }
+    ErrorF("    owner-events %s, kb %d ptr %d, confine 0x%lx, cursor 0x%lx\n",
+           pGrab->ownerEvents ? "true" : "false",
+           pGrab->keyboardMode, pGrab->pointerMode,
+           pGrab->confineTo ? (unsigned long) pGrab->confineTo->drawable.id : 0,
+           pGrab->cursor ? (unsigned long) pGrab->cursor->id : 0);
+}
+
+void
+PrintPassiveGrabs(void)
+{
+    int i;
+    LocalClientCredRec *lcc;
+    pid_t clientpid;
+    const char *cmdname;
+    const char *cmdargs;
+
+    ErrorF("Printing all currently registered grabs\n");
+
+    for (i = 1; i < currentMaxClients; i++) {
+        if (!clients[i] || clients[i]->clientState != ClientStateRunning)
+            continue;
+
+        clientpid = GetClientPid(clients[i]);
+        cmdname = GetClientCmdName(clients[i]);
+        cmdargs = GetClientCmdArgs(clients[i]);
+        if ((clientpid > 0) && (cmdname != NULL)) {
+            ErrorF("  Printing all registered grabs of client pid %ld %s %s\n",
+                   (long) clientpid, cmdname, cmdargs ? cmdargs : "");
+        } else {
+            if (GetLocalClientCreds(clients[i], &lcc) == -1) {
+                ErrorF("  GetLocalClientCreds() failed\n");
+                continue;
+            }
+            ErrorF("  Printing all registered grabs of 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);
+        }
+
+        FindClientResourcesByType(clients[i], RT_PASSIVEGRAB, log_grab_info, NULL);
+    }
+    ErrorF("End list of registered passive grabs\n");
+}
+
 void
 PrintWindowTree(void)
 {
diff --git a/hw/xfree86/dixmods/xkbPrivate.c b/hw/xfree86/dixmods/xkbPrivate.c
index 574590f..4b9ef33 100644
--- a/hw/xfree86/dixmods/xkbPrivate.c
+++ b/hw/xfree86/dixmods/xkbPrivate.c
@@ -38,6 +38,8 @@ XkbDDXPrivate(DeviceIntPtr dev, KeyCode key, XkbAction *act)
                 if (tmp->deviceGrab.grab)
                     PrintDeviceGrabInfo(tmp);
             xf86Msg(X_INFO, "End list of active device grabs\n");
+
+            PrintPassiveGrabs();
         }
         else if (strcasecmp(msgbuf, "ungrab") == 0)
             UngrabAllDevices(FALSE);
diff --git a/include/window.h b/include/window.h
index 6daec85..f13ed51 100644
--- a/include/window.h
+++ b/include/window.h
@@ -223,6 +223,7 @@ extern _X_EXPORT RegionPtr CreateClipShape(WindowPtr /* pWin */ );
 
 extern _X_EXPORT void SetRootClip(ScreenPtr pScreen, Bool enable);
 extern _X_EXPORT void PrintWindowTree(void);
+extern _X_EXPORT void PrintPassiveGrabs(void);
 
 extern _X_EXPORT VisualPtr WindowGetVisual(WindowPtr /*pWin*/);
 #endif                          /* WINDOW_H */
-- 
2.6.0.rc2.230.g3dd15c0