From b39fb4b360af0797ba70a33d8c3a17c245f1ce99 Mon Sep 17 00:00:00 2001
From: Sam <samual.shop@proton.me>
Date: Sat, 12 Oct 2024 12:20:01 +0100
Subject: [PATCH] initial commit

---
 Makefile       | 26 ++++++++++++++++++++++++++
 set_wm_class.c | 40 ++++++++++++++++++++++++++++++++++++++++
 2 files changed, 66 insertions(+)
 create mode 100644 Makefile
 create mode 100644 set_wm_class.c

diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..05d70b4
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,26 @@
+PREFIX  := /usr/local
+CC      := cc
+LDFLAGS := -lX11
+
+all: options set_wm_class
+
+options:
+	@echo set_wm_class build options:
+	@echo "LDFLAGS = ${LDFLAGS}"
+	@echo "CC      = ${CC}"
+
+set_wm_class: set_wm_class.c
+	${CC} -o set_wm_class set_wm_class.c ${LDFLAGS}
+
+clean:
+	rm -f set_wm_class
+
+install: set_wm_class
+	mkdir -p ${DESTDIR}${PREFIX}/bin
+	cp -f set_wm_class ${DESTDIR}${PREFIX}/bin
+	chmod 755 ${DESTDIR}${PREFIX}/bin/set_wm_class
+
+uninstall:
+	rm -f ${DESTDIR}${PREFIX}/bin/set_wm_class
+
+.PHONY: all options clean install uninstall
diff --git a/set_wm_class.c b/set_wm_class.c
new file mode 100644
index 0000000..0d5dc09
--- /dev/null
+++ b/set_wm_class.c
@@ -0,0 +1,40 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <X11/Xlib.h>
+#include <X11/Xutil.h>
+
+int main(int argc, char *argv[])
+{
+	unsigned long value;
+	char *terminatedAt;
+	XClassHint class;
+	Status status;
+	Display *display;
+	Window window;
+	
+	if ( argc != 3 ) {
+		printf( "Usage: %s <window id> <window class>\n", argv[0] );
+		return 1;
+	}
+	window = strtoul( argv[1], &terminatedAt, 0 );
+	if ( *terminatedAt != '\0' ) {
+		printf( "Could not parse window id: %s\n", argv[1] );
+		return 2;
+	}
+	
+	display = XOpenDisplay( NULL );
+	status = XGetClassHint( display, window, &class );
+	if ( !status ) return 4;
+	
+	XFree( class.res_class );
+	class.res_class = strdup( argv[2] );
+	printf("Setting WM_CLASS of window %lu to \"%s\", \"%s\"\n", window, class.res_name, class.res_class );
+	XSetClassHint( display, window, &class );
+	
+	XCloseDisplay( display );
+	XFree( class.res_name );
+	XFree( class.res_class );
+	return 0;
+}
+