1 files changed, 47 insertions, 0 deletions
diff --git a/tests/misc/cat-buf.sh b/tests/misc/cat-buf.sh
new file mode 100755
index 0000000..e075d22
--- /dev/null
+++ b/tests/misc/cat-buf.sh
@@ -0,0 +1,47 @@
+#!/bin/sh
+# Ensure that cat outputs processed data immediately.
+
+# Copyright (C) 2009-2022 Free Software Foundation, Inc.
+
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+. "${srcdir=.}/tests/init.sh"; path_prepend_ ./src
+print_ver_ cat
+
+# Use a fifo rather than a pipe in the tests below
+# so that the producer (cat) will wait until the
+# consumer (dd) opens the fifo therefore increasing
+# the chance that dd will read the data from each
+# write separately.
+mkfifo_or_skip_ fifo
+
+# Terminate any background cp process
+cleanup_() { kill $pid 2>/dev/null && wait $pid; }
+
+echo 1 > exp
+
+cat_buf_1()
+{
+  local delay="$1"
+
+  > out || framework_failure_
+  dd count=1 if=fifo > out & pid=$!
+  (echo 1; sleep $delay; echo 2) | cat -v > fifo
+  wait $pid
+  compare exp out
+}
+
+retry_delay_ cat_buf_1 .1 6 || fail=1
+
+Exit $fail