From 1cd1bb09654e91cec55a97d21644e316c02f1802 Mon Sep 17 00:00:00 2001
From: Nicolas Viennot <nicolas@viennot.biz>
Date: Sun, 27 Mar 2016 22:41:33 -0400
Subject: [PATCH] Setup UTF8 locale

---
 tmate-slave.c | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/tmate-slave.c b/tmate-slave.c
index f02bc2eb..e1a50331 100644
--- a/tmate-slave.c
+++ b/tmate-slave.c
@@ -130,6 +130,25 @@ static char* get_full_hostname(void)
 	freeaddrinfo(info);
 	return ret;
 }
+#include <langinfo.h>
+#include <locale.h>
+
+static void setup_locale(void)
+{
+	const char *s;
+
+	if (setlocale(LC_CTYPE, "en_US.UTF-8") == NULL) {
+		if (setlocale(LC_CTYPE, "") == NULL)
+			tmate_fatal("invalid LC_ALL, LC_CTYPE or LANG");
+		s = nl_langinfo(CODESET);
+		if (strcasecmp(s, "UTF-8") != 0 &&
+		    strcasecmp(s, "UTF8") != 0)
+			tmate_fatal("need UTF-8 locale (LC_CTYPE) but have %s", s);
+	}
+
+	setlocale(LC_TIME, "");
+	tzset();
+}
 
 int main(int argc, char **argv, char **envp)
 {
@@ -167,6 +186,8 @@ int main(int argc, char **argv, char **envp)
 	init_logging("tmate-remote-tmux",
 		     tmate_settings->use_syslog, tmate_settings->log_level);
 
+	setup_locale();
+
 	if (!tmate_settings->tmate_host)
 		tmate_settings->tmate_host = get_full_hostname();