--- osdep-netbsd.c.orig	2017-10-31 21:59:19.000000000 +0000
+++ osdep-netbsd.c	2017-10-31 22:01:05.000000000 +0000
@@ -129,7 +129,23 @@
 char *
 osdep_get_cwd(int fd)
 {
-	return (NULL);
+	static char	cwd[MAXPATHLEN + 1];
+	char		*path;
+	pid_t		pgrp;
+	ssize_t		n;
+
+	if ((pgrp = tcgetpgrp(fd)) == -1)
+		return (NULL);
+
+	xasprintf(&path, "/proc/%lld/cwd", (long long) pgrp);
+	n = readlink(path, cwd, MAXPATHLEN);
+	free(path);
+
+	if (n == -1)
+		return (NULL);
+
+	cwd[n] = '\0';
+	return (cwd);
 }
 
 struct event_base *