Fix input device labels

Axis labels were implemented, but guarded by non-existing
HAVE_PROPERTIES+HAVE_LABELS define. Button labels were not implemented
at all (array was allocated, but not filled with any data, resulting in
a stack rubble being passed on). Fix both issues.

Fixes QubesOS/qubes-issues#9412

xf86-input-mfndev/src/labels.h

@@ -0,0 +1,56 @@
+#ifndef INPUT_LABELS
+#define INPUT_LABELS
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <xserver-properties.h>
+
+/* Aligned with linux/input.h.
+   Note that there are holes in the ABS_ range, these are simply replaced with
+   MISC here */
+const char* abs_labels[] = {
+    AXIS_LABEL_PROP_ABS_X,              /* 0x00 */
+    AXIS_LABEL_PROP_ABS_Y,              /* 0x01 */
+    AXIS_LABEL_PROP_ABS_Z,              /* 0x02 */
+    AXIS_LABEL_PROP_ABS_RX,             /* 0x03 */
+    AXIS_LABEL_PROP_ABS_RY,             /* 0x04 */
+    AXIS_LABEL_PROP_ABS_RZ,             /* 0x05 */
+    AXIS_LABEL_PROP_ABS_THROTTLE,       /* 0x06 */
+    AXIS_LABEL_PROP_ABS_RUDDER,         /* 0x07 */
+    AXIS_LABEL_PROP_ABS_WHEEL,          /* 0x08 */
+    AXIS_LABEL_PROP_ABS_GAS,            /* 0x09 */
+    AXIS_LABEL_PROP_ABS_BRAKE,          /* 0x0a */
+};
+
+const char* rel_labels[] = {
+    AXIS_LABEL_PROP_REL_X,
+    AXIS_LABEL_PROP_REL_Y,
+    AXIS_LABEL_PROP_REL_Z,
+    AXIS_LABEL_PROP_REL_RX,
+    AXIS_LABEL_PROP_REL_RY,
+    AXIS_LABEL_PROP_REL_RZ,
+    AXIS_LABEL_PROP_REL_HWHEEL,
+    AXIS_LABEL_PROP_REL_DIAL,
+    AXIS_LABEL_PROP_REL_WHEEL,
+    AXIS_LABEL_PROP_REL_MISC
+};
+
+const char* btn_labels[] = {
+    BTN_LABEL_PROP_BTN_LEFT,
+    BTN_LABEL_PROP_BTN_MIDDLE,
+    BTN_LABEL_PROP_BTN_RIGHT,
+    BTN_LABEL_PROP_BTN_WHEEL_UP,
+    BTN_LABEL_PROP_BTN_WHEEL_DOWN,
+    BTN_LABEL_PROP_BTN_HWHEEL_LEFT,
+    BTN_LABEL_PROP_BTN_HWHEEL_RIGHT,
+    BTN_LABEL_PROP_BTN_SIDE,
+    BTN_LABEL_PROP_BTN_EXTRA,
+    BTN_LABEL_PROP_BTN_FORWARD,
+    BTN_LABEL_PROP_BTN_BACK,
+};
+
+
+
+#endif

xf86-input-mfndev/src/qubes.c

@@ -51,6 +51,7 @@
 #include <linux/types.h>
 
 #include <xf86_OSproc.h>
+#include <xserver-properties.h>
 
 #include <unistd.h>
 
@@ -63,16 +64,6 @@
 
 #include <windowstr.h>
 
-#ifdef HAVE_PROPERTIES
-#include <xserver-properties.h>
-/* 1.6 has properties, but no labels */
-#ifdef AXIS_LABEL_PROP
-#define HAVE_LABELS
-#else
-#undef HAVE_LABELS
-#endif
-
-#endif
 
 #if GET_ABI_MAJOR(ABI_XINPUT_VERSION) >= 23
 #define HAVE_THREADED_INPUT 1
@@ -100,6 +91,7 @@
 #include <qubes-gui-protocol.h>
 #include "xdriver-shm-cmd.h"
 #include "qubes.h"
+#include "labels.h"
 
 #include "../../xf86-qubes-common/include/xf86-qubes-common.h"
 
@@ -125,7 +117,7 @@ static void QubesBlockHandler(void *arg, void *timeout);
 static void QubesWakeupHandler(void *arg, int result);
 #endif
 
-
+#define ArrayLength(x) (sizeof(x)/sizeof((x)[0]))
 
 _X_EXPORT InputDriverRec QUBES = {
     1,
@@ -275,6 +267,29 @@ static int _qubes_init_kbd(DeviceIntPtr device)
     return Success;
 }
 
+static void QubesInitButtonLabels(QubesDevicePtr pQubes, int natoms,
+                                  Atom * atoms)
+{
+    Atom atom;
+    int btn;
+    const char **labels;
+    int labels_len = 0;
+
+    labels = btn_labels;
+    labels_len = ArrayLength(btn_labels);
+
+    memset(atoms, 0, natoms * sizeof(Atom));
+
+    /* Now fill the ones we know */
+    for (btn = 0; btn < labels_len && btn < natoms; btn++) {
+        atom = XIGetKnownProperty(labels[btn]);
+        if (!atom)    /* Should not happen */
+            continue;
+
+        atoms[btn] = atom;
+    }
+}
+
 static int _qubes_init_buttons(DeviceIntPtr device)
 {
     InputInfoPtr pInfo = device->public.devicePrivate;
@@ -293,6 +308,7 @@ static int _qubes_init_buttons(DeviceIntPtr device)
 
     pQubes->labels = calloc(num_buttons, sizeof(Atom));
 
+    QubesInitButtonLabels(pQubes, num_buttons, pQubes->labels);
     if (!InitButtonClassDeviceStruct(device, num_buttons,
                                      pQubes->labels, map)) {
         xf86Msg(X_ERROR, "%s: Failed to register buttons.\n",
@@ -307,31 +323,24 @@ static int _qubes_init_buttons(DeviceIntPtr device)
 static void QubesInitAxesLabels(QubesDevicePtr pQubes, int natoms,
                                 Atom * atoms)
 {
-#ifdef HAVE_LABELS
     Atom atom;
     int axis;
-    char **labels;
+    const char **labels;
     int labels_len = 0;
-    char *misc_label;
 
     labels = rel_labels;
     labels_len = ArrayLength(rel_labels);
-    misc_label = AXIS_LABEL_PROP_REL_MISC;
 
     memset(atoms, 0, natoms * sizeof(Atom));
 
     /* Now fill the ones we know */
-    for (axis = 0; axis < labels_len; axis++) {
-        if (pQubes->axis_map[axis] == -1)
-            continue;
-
+    for (axis = 0; axis < labels_len && axis < natoms; axis++) {
         atom = XIGetKnownProperty(labels[axis]);
         if (!atom)    /* Should not happen */
             continue;
 
-        atoms[pQubes->axis_map[axis]] = atom;
+        atoms[axis] = atom;
     }
-#endif
 }