From ef1729c0f2f85ed66b9b5accbc0eb9a62af36ef2 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?John=20Ankarstr=C3=B6m?= <john@ankarstrom.se>
Date: Mon, 7 Jun 2021 19:41:00 +0200
Subject: Get it working

---
 Makefile |  2 +-
 tterm.c  | 69 +++++++++++++++++++++++++++++++++++++++++++++++++++++++---------
 2 files changed, 61 insertions(+), 10 deletions(-)

diff --git a/Makefile b/Makefile
index 00825f5..9adada0 100644
--- a/Makefile
+++ b/Makefile
@@ -1,6 +1,6 @@
 CFLAGS != pkg-config --cflags x11
 LDFLAGS != pkg-config --libs x11
-CFLAGS += -O2 -pedantic -Wall -Wextra
+CFLAGS += -O2
 
 tterm: tterm.c
 
diff --git a/tterm.c b/tterm.c
index 3aceae7..626d414 100644
--- a/tterm.c
+++ b/tterm.c
@@ -1,8 +1,10 @@
 #include <err.h>
+#include <errno.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include <sys/param.h>
+#include <sys/stat.h>
 #include <unistd.h>
 #include <X11/Xatom.h>
 #include <X11/Xlib.h>
@@ -41,22 +43,71 @@ findwindow(unsigned int pid, Window w)
 int
 main(int argc, char *argv[])
 {
-	char *ap;
+	char *cwd, *cmd, *line, *writefile;
+	FILE *writefp;
+	int i;
+	pid_t child;
+	size_t size;
+	ssize_t len;
 	Window w;
 
+	/* create fifo */
+
+	writefile = malloc(40*sizeof(char));
+	if (writefile == NULL) err(1, "malloc");
+
+	sprintf(writefile, "/var/tmp/tterm/%d.w", getpid());
+	if (mkdir("/var/tmp/tterm", 0700) == -1 && errno != EEXIST)
+		err(1, "mkdir");
+
+	unlink(writefile);
+	if (mkfifo(writefile, 0600) == -1) err(1, "mkfifo");
+
+	/* start terminal */
+	if ((child = fork()) == 0) {
+		execlp("xterm", "xterm", "-e", "/usr/local/bin/ksh",
+			"-w", writefile, NULL);
+		err(1, "execvp");
+	}
+
+	/* find new window */
+
 	display = XOpenDisplay(0);
-	if (display == NULL)
-		die("could not open display\n");
+	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");
+	if (pidatom == None) die("no _NET_WM_PID atom found\n");
+
+	for (i = 0; !w && i++ < 1000; w = findwindow(child, root)) ;
+	if (!w) die("could not find window\n");
+
+	/* watch fifo and update title */
+	writefp = fopen(writefile, "r");
+	if (writefp == NULL) err(1, "fopen");
 
-	w = findwindow(2400, root);
-	if (!w)
-		die("could not find window\n");
+	cmd = malloc(1000*sizeof(char));
+	if (cmd == NULL) err(1, "malloc");
+
+	line = NULL;
+	size = 0;
+	while ((len = getline(&line, &size, writefp)) != -1) {
+		if (strncmp(line, "cwd", 3) == 0) {
+			line += 3; line[len-4] = 0; /* chomp */
+			cwd = strdup(line);
+			XStoreName(display, w, cwd);
+			XFlush(display);
+		} else if (strncmp(line, "cmd", 3) == 0) {
+			line += 3; line[len-4] = 0; /* chomp */
+			snprintf(cmd, 1000, "%s (%s)", line, cwd);
+			XStoreName(display, w, cmd);
+			XFlush(display);
+		} else {
+			XStoreName(display, w, cwd);
+			XFlush(display);
+		}
+	}
 
-	//XStoreName(display, w, ap);
+	unlink(writefile);
 	XCloseDisplay(display);
 }
-- 
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