From 2a809125299261db9db9b97e93b5885223c6e9d3 Mon Sep 17 00:00:00 2001
From: Pádraig Brady <P@draigBrady.com>
Date: Tue, 8 Nov 2016 17:34:44 +0000
Subject: tail: terminate when following pipes and untailable non pipes

* src/tail.c (ignore_pipe_or_fifo): Mark the descriptor as -1
for pipes so that any_live_files() detects correctly that
the entry is no longer live.
* tests/tail-2/pipe-f.sh: Add a test case.
* NEWS: Mention the fix.
Fixes http://bugs.gnu.org/24903 which was detected
using Symbolic Execution techniques developed in
the course of the SYMBIOSYS research project at
COMSYS, RWTH Aachen University.
---
 tests/tail-2/pipe-f.sh | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

(limited to 'tests')

diff --git a/tests/tail-2/pipe-f.sh b/tests/tail-2/pipe-f.sh
index 7abb7d6fe..82364dacc 100755
--- a/tests/tail-2/pipe-f.sh
+++ b/tests/tail-2/pipe-f.sh
@@ -19,9 +19,18 @@
 . "${srcdir=.}/tests/init.sh"; path_prepend_ ./src
 print_ver_ tail
 
+echo oo > exp || framework_failure_
 echo foo | timeout 10 tail -f -c3 > out || fail=1
-echo oo > exp || fail=1
+compare exp out || fail=1
+
+cat <<\EOF > exp
+==> standard input <==
+ar
 
+==> missing <==
+EOF
+mkdir missing || framework_failure_
+echo bar | returns_ 1 timeout 10 tail -f -c3 - missing > out || fail=1
 compare exp out || fail=1
 
 Exit $fail
-- 
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