From [SourceForge.net: tmux-users](http://sourceforge.net/mailarchive/forum.php?thread_name=CAKzmjJ%3DQ-TVF9o34pdEFjoEfwhWrdHTUf_XRJELno_2KvH8zeA%40mail.gmail.com&forum_name=tmux-users)

tmux-cygwin.patch

--- client.c.orig  2013-06-02 15:29:03.175177500 -0500
+++ client.c	2013-06-02 15:32:59.124455900 -0500
@@ -328,8 +328,12 @@
 	    strlcpy(data.term, term, sizeof data.term) >= sizeof data.term)
 		*data.term = '\0';
 
+#ifdef __CYGWIN__
+	snprintf(&data.ttyname, sizeof(data.ttyname), "%s", ttyname(STDIN_FILENO));
+#else
 	if ((fd = dup(STDIN_FILENO)) == -1)
 		fatal("dup failed");
+#endif
 	imsg_compose(&client_ibuf,
 	    MSG_IDENTIFY, PROTOCOL_VERSION, -1, fd, &data, sizeof data);
 	client_update_event();
--- compat.h.orig	2013-06-02 15:29:11.627331100 -0500
+++ compat.h	2013-06-02 15:37:16.692688900 -0500
@@ -198,6 +198,10 @@
 
 #ifndef HAVE_B64_NTOP
 /* b64_ntop.c */
+#ifdef __CYGWIN__
+#undef b64_ntop
+#endif
+
 int		 b64_ntop(const char *, size_t, char *, size_t);
 #endif
 
@@ -242,4 +246,8 @@
 #define optarg             BSDoptarg
 #endif
 
+#ifndef ECHOPRT
+#define ECHOPRT         0x00000020      /* visual erase mode for hardcopy */
+#endif
+
 #endif /* COMPAT_H */
--- server-client.c.orig	2013-06-02 15:29:19.949297500 -0500
+++ server-client.c	2013-06-02 15:32:59.164513500 -0500
@@ -823,9 +823,12 @@
 		case MSG_IDENTIFY:
 			if (datalen != sizeof identifydata)
 				fatalx("bad MSG_IDENTIFY size");
+			memcpy(&identifydata, imsg.data, sizeof identifydata);
+#ifdef __CYGWIN__
+			imsg.fd = open(identifydata.ttyname, O_RDWR|O_NOCTTY);
+#endif
 			if (imsg.fd == -1)
 				fatalx("MSG_IDENTIFY missing fd");
-			memcpy(&identifydata, imsg.data, sizeof identifydata);
 
 			server_client_msg_identify(c, &identifydata, imsg.fd);
 			break;
--- tmux.h.orig	2013-06-02 15:29:33.138262300 -0500
+++ tmux.h	2013-06-02 15:33:32.450244100 -0500
@@ -475,6 +475,10 @@
 
 	char		term[TERMINAL_LENGTH];
 
+#ifdef __CYGWIN__
+	char		ttyname[TTY_NAME_MAX];
+#endif
+
 #define IDENTIFY_UTF8 0x1
 #define IDENTIFY_256COLOURS 0x2
 #define IDENTIFY_88COLOURS 0x4