-
- if (XGetWindowProperty (dpy, kids[i],
- XA_SCREENSAVER_VERSION,
- 0, 200, False, XA_STRING,
- &type, &format, &nitems, &bytesafter,
- (unsigned char **) &v)
- == Success
- && type != None)
+ int status;
+
+ /* We're walking the list of root-level windows and trying to find
+ the one that has a particular property on it. We need to trap
+ BadWindows errors while doing this, because it's possible that
+ some random window might get deleted in the meantime. (That
+ window won't have been the one we're looking for.)
+ */
+ XSync (dpy, False);
+ if (old_handler) abort();
+ got_badwindow = False;
+ old_handler = XSetErrorHandler (BadWindow_ehandler);
+ status = XGetWindowProperty (dpy, kids[i],
+ XA_SCREENSAVER_VERSION,
+ 0, 200, False, XA_STRING,
+ &type, &format, &nitems, &bytesafter,
+ (unsigned char **) &v);
+ XSync (dpy, False);
+ XSetErrorHandler (old_handler);
+ old_handler = 0;
+
+ if (got_badwindow)
+ {
+ status = BadWindow;
+ got_badwindow = False;
+ }
+
+ if (status == Success && type != None)