--- ./src/loslib.c	2017-11-18 15:51:35.425137997 +0000
+++ ../loslib.c	2017-11-18 16:20:36.202578294 +0000
@@ -118,8 +118,8 @@
 #define LUA_TMPNAMTEMPLATE	"@TERMUX_PREFIX@/tmp/lua_XXXXXX"
 #endif
 
-#define lua_tmpnam(b,e) { \
-        strcpy(b, LUA_TMPNAMTEMPLATE); \
+#define lua_tmpnam(b,e,s) {	       \
+        strncpy(b, LUA_TMPNAMTEMPLATE, s);   \
         e = mkstemp(b); \
         if (e != -1) close(e); \
         e = (e == -1); }
@@ -166,7 +166,7 @@
 static int os_tmpname (lua_State *L) {
   char buff[LUA_TMPNAMBUFSIZE];
   int err;
-  lua_tmpnam(buff, err);
+  lua_tmpnam(buff, err, LUA_TMPNAMBUFSIZE - 1);
   if (err)
     return luaL_error(L, "unable to generate a unique filename");
   lua_pushstring(L, buff);