diff --git a/control.c b/control.c
index 91972261..b5ec6bdb 100644
--- a/control.c
+++ b/control.c
@@ -79,6 +79,15 @@ control_write(struct client *c, const char *fmt, ...)
 	server_push_stdout(c);
 }
 
+/* Write a buffer, adding a terminal newline. Empties buffer. */
+void
+control_write_buffer(struct client *c, struct evbuffer *buffer)
+{
+	evbuffer_add_buffer(c->stdout_data, buffer);
+	evbuffer_add(c->stdout_data, "\n", 1);
+	server_push_stdout(c);
+}
+
 /* Control input callback. Read lines and fire commands. */
 void
 control_callback(struct client *c, int closed, unused void *data)
diff --git a/osdep-openbsd.c b/osdep-openbsd.c
index 4fb75bff..402b501c 100644
--- a/osdep-openbsd.c
+++ b/osdep-openbsd.c
@@ -137,10 +137,12 @@ error:
 char*
 osdep_get_cwd(pid_t pid)
 {
-	int		name[] = { CTL_KERN, KERN_PROC_CWD, (int)pid };
+	int		name[] = { CTL_KERN, KERN_PROC_CWD, 0 };
 	static char	path[MAXPATHLEN];
 	size_t		pathlen = sizeof path;
 
+	if ((name[2] = tcgetpgrp(fd)) == -1)
+		return (NULL);
 	if (sysctl(name, 3, path, &pathlen, NULL, 0) != 0)
 		return (NULL);
 	return (path);
diff --git a/tmux.h b/tmux.h
index 9374012b..83bcb878 100644
--- a/tmux.h
+++ b/tmux.h
@@ -2217,6 +2217,7 @@ void	clear_signals(int);
 /* control.c */
 void	control_callback(struct client *, int, void*);
 void printflike2 control_write(struct client *, const char *, ...);
+void	control_write_buffer(struct client *, struct evbuffer *);
 
 /* control-notify.c */
 void	control_notify_window_layout_changed(struct window *);