tmux2.3 WSL(Bash on Windows, Windows Subsystem for Linux) patch

tmux-wsl.patch

--- osdep-linux.c	2016-01-21 09:00:28.000000000 +0900
+++ osdep-linux.c	2016-10-06 18:58:31.307743300 +0900
@@ -21,6 +21,7 @@
 #include <sys/param.h>
 
 #include <event.h>
+#include <fcntl.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <unistd.h>
@@ -66,10 +67,16 @@ osdep_get_cwd(int fd)
 {
 	static char	 target[MAXPATHLEN + 1];
 	char		*path;
+	const char	*ttypath;
 	pid_t		 pgrp, sid;
+	int			 ttyfd;
 	ssize_t		 n;
 
+	if ((ttypath = ptsname(fd)) == NULL)
+		return (NULL);
+	if ((ttyfd = open(ttypath, O_RDONLY|O_NOCTTY)) == -1)
+		return (NULL);
-	if ((pgrp = tcgetpgrp(fd)) == -1)
+	if ((pgrp = tcgetpgrp(ttyfd)) == -1)
 		return (NULL);
 
 	xasprintf(&path, "/proc/%lld/cwd", (long long) pgrp);