commit a9b6a312a77b9cc81ca8b08a95c09e9f7948d7a6
from: Omar Sandoval <osandov@osandov.com>
via: Hiltjo Posthuma <hiltjo@codemadness.org>
date: Fri Nov  3 19:40:34 2017 UTC

Set class name on status bar

This is useful for configuring compositors to ignore the status bar
window.

commit - 6aa8e37efe22c8a2a7713d9a437491c564c04b7e
commit + a9b6a312a77b9cc81ca8b08a95c09e9f7948d7a6
blob - 47823432bfe5effed3b251b2f94e12cc2aa979ca
blob + b0d99c05ffed432638a943610625fa5adbbfb400
--- dwm.c
+++ dwm.c
@@ -1809,6 +1809,7 @@ updatebars(void)
 		.background_pixmap = ParentRelative,
 		.event_mask = ButtonPressMask|ExposureMask
 	};
+	XClassHint ch = {"dwm", "dwm"};
 	for (m = mons; m; m = m->next) {
 		if (m->barwin)
 			continue;
@@ -1817,6 +1818,7 @@ updatebars(void)
 				CWOverrideRedirect|CWBackPixmap|CWEventMask, &wa);
 		XDefineCursor(dpy, m->barwin, cursor[CurNormal]->cursor);
 		XMapRaised(dpy, m->barwin);
+		XSetClassHint(dpy, m->barwin, &ch);
 	}
 }