From 7aa3da1cd7e3221b6acac8e4f97cc2af2ed88dc9 Mon Sep 17 00:00:00 2001
From: senhuang42 <senhuang96@fb.com>
Date: Tue, 22 Sep 2020 14:15:52 -0400
Subject: [PATCH] Use IS_CONSOLE macro to detect that we're indeed using a
 console

---
 programs/util.c    | 4 ++++
 tests/playTests.sh | 1 -
 2 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/programs/util.c b/programs/util.c
index d828dc42..b4f1f402 100644
--- a/programs/util.c
+++ b/programs/util.c
@@ -90,6 +90,10 @@ int g_utilDisplayLevel;
 int UTIL_requireUserConfirmation(const char* prompt, const char* abortMsg,
                                           const char* acceptableLetters) {
     int ch, result;
+    /* If input is presented via stdin, dont use prompt as it may swallow characters */
+    if (!IS_CONSOLE(stdin))
+        return 0;
+
     UTIL_DISPLAY("%s", prompt);
     ch = getchar();
     result = 0;
diff --git a/tests/playTests.sh b/tests/playTests.sh
index d9407db8..44fd7400 100755
--- a/tests/playTests.sh
+++ b/tests/playTests.sh
@@ -309,7 +309,6 @@ test -f precompressedFilterTestDir/input.5.zst.zst
 test -f precompressedFilterTestDir/input.6.zst.zst
 println "Test completed"
 
-
 println "\n===>  recursive mode test "
 # combination of -r with empty list of input file
 zstd -c -r < tmp > tmp.zst