From 561a189f49441a4d211c0217dce8127f2ce7c32e Mon Sep 17 00:00:00 2001
From: Karen Arutyunov <karen@codesynthesis.com>
Date: Sat, 5 Aug 2017 04:06:53 +0300
Subject: Fix printing progress to non-terminal STDERR

---
 libbutl/fdstream.hxx | 6 ++++++
 1 file changed, 6 insertions(+)

(limited to 'libbutl/fdstream.hxx')

diff --git a/libbutl/fdstream.hxx b/libbutl/fdstream.hxx
index fa62ff4..3bd8e8b 100644
--- a/libbutl/fdstream.hxx
+++ b/libbutl/fdstream.hxx
@@ -686,6 +686,12 @@ namespace butl
   //
   LIBBUTL_SYMEXPORT fdpipe
   fdopen_pipe (fdopen_mode = fdopen_mode::none);
+
+  // Test whether a file descriptor refers to a terminal. Throw ios::failure on
+  // the underlying OS error.
+  //
+  LIBBUTL_SYMEXPORT bool
+  fdterm (int);
 }
 
 #include <libbutl/fdstream.ixx>
-- 
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