1 files changed, 46 insertions, 0 deletions
diff --git a/tests/tail-2/pipe-f.sh b/tests/tail-2/pipe-f.sh
new file mode 100755
index 0000000..76b0d90
--- /dev/null
+++ b/tests/tail-2/pipe-f.sh
@@ -0,0 +1,46 @@
+#!/bin/sh
+# ensure that tail -f doesn't hang in various cases
+
+# Copyright (C) 2009-2018 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_ tail
+
+# Speedup the non inotify case
+fastpoll='-s.1 --max-unchanged-stats=1'
+
+for mode in '' '---disable-inotify'; do
+# Ensure :|tail -f doesn't hang, per POSIX
+echo oo > exp || framework_failure_
+echo foo | timeout 10 tail -f $mode $fastpoll -c3 > out || fail=1
+compare exp out || fail=1
+cat <<\EOF > exp || framework_failure_
+==> standard input <==
+ar
+EOF
+echo bar | returns_ 1 \
+ timeout 10 tail -f $mode $fastpoll -c3 - missing > out || fail=1
+compare exp out || fail=1
+
+# This would wait indefinitely before v8.28 due to no EPIPE being
+# generated due to no data written after the first small amount
+timeout 10 tail -f $mode $fastpoll out | sleep .1 || fail=1
+
+# This would wait indefinitely before v8.28 (until first write)
+(returns_ 1 timeout 10 tail -f $mode $fastpoll /dev/null >&-) || fail=1
+done
+
+Exit $fail