From 81b09f0e5cd153bdca77782c3438cd28ffefeace Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?John=20Ankarstr=C3=B6m?= <john@ankarstrom.se>
Date: Mon, 7 Jun 2021 18:47:38 +0200
Subject: First commit

---
 Makefile |  8 ++++++++
 tterm.c  | 62 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 70 insertions(+)
 create mode 100644 Makefile
 create mode 100644 tterm.c

diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..00825f5
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,8 @@
+CFLAGS != pkg-config --cflags x11
+LDFLAGS != pkg-config --libs x11
+CFLAGS += -O2 -pedantic -Wall -Wextra
+
+tterm: tterm.c
+
+install:
+	install tterm /usr/local/bin
diff --git a/tterm.c b/tterm.c
new file mode 100644
index 0000000..3aceae7
--- /dev/null
+++ b/tterm.c
@@ -0,0 +1,62 @@
+#include <err.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/param.h>
+#include <unistd.h>
+#include <X11/Xatom.h>
+#include <X11/Xlib.h>
+
+#define die(...) do{fprintf(stderr,__VA_ARGS__);exit(1);}while(0)
+
+Atom pidatom;
+Display *display;
+Window root;
+
+unsigned char *pidprop = 0;
+
+Window
+findwindow(unsigned int pid, Window w)
+{
+	Atom type;
+	int format;
+	unsigned int i, nchildren;
+	unsigned long nitems, bytes_after;
+	Window *children, _root, parent;
+
+	pidprop = 0;
+	if (XGetWindowProperty(display, w, pidatom, 0, 1, False, XA_CARDINAL,
+		&type, &format, &nitems, &bytes_after, &pidprop) == Success
+	&& pidprop && pid == *((unsigned long *)pidprop))
+		return w;
+
+	if (XQueryTree(display, w, &_root, &parent, &children, &nchildren))
+		for (i = 0; i < nchildren; i++) {
+			w = findwindow(pid, children[i]);
+			if (w) return w;
+		}
+	return 0;
+}
+
+int
+main(int argc, char *argv[])
+{
+	char *ap;
+	Window w;
+
+	display = XOpenDisplay(0);
+	if (display == NULL)
+		die("could not open display\n");
+
+	root = XDefaultRootWindow(display);
+	pidatom = XInternAtom(display, "_NET_WM_PID", 1);
+	if (pidatom == None)
+		die("no _NET_WM_PID atom found\n");
+
+	w = findwindow(2400, root);
+	if (!w)
+		die("could not find window\n");
+
+	//XStoreName(display, w, ap);
+	XCloseDisplay(display);
+}
-- 
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