67 lines
2.3 KiB
Bash
Executable file
67 lines
2.3 KiB
Bash
Executable file
#!/bin/sh
|
|
# ensure that tail -f doesn't hang in various cases
|
|
|
|
# Copyright (C) 2009-2025 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 test head
|
|
trap_sigpipe_or_skip_
|
|
|
|
# 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.
|
|
# Also check tail exits if SIGPIPE is being ignored.
|
|
# Note 'trap - SIGPIPE' is ineffective if the initiating shell
|
|
# has ignored SIGPIPE, but that's not the normal case.
|
|
case $host_triplet in
|
|
*aix*) echo 'avoiding due to no way to detect closed outputs on AIX' ;;
|
|
*)
|
|
for disposition in '' '-'; do
|
|
(trap "$disposition" PIPE;
|
|
returns_ 124 timeout 10 \
|
|
tail -n2 -f $mode $fastpoll out && touch timed_out) |
|
|
head -n2 > out2
|
|
test -e timed_out && fail=1
|
|
compare exp out2 || fail=1
|
|
rm -f timed_out
|
|
done ;;
|
|
esac
|
|
|
|
# This would wait indefinitely before v8.28 (until first write)
|
|
# test -w /dev/stdout is used to check that >&- is effective
|
|
# which was seen not to be the case on NetBSD 7.1 / x86_64:
|
|
if env test -w /dev/stdout >/dev/null &&
|
|
env test ! -w /dev/stdout >&-; then
|
|
(returns_ 1 timeout 10 tail -f $mode $fastpoll /dev/null >&-) || fail=1
|
|
fi
|
|
done
|
|
|
|
Exit $fail
|