1#!/bin/sh 2# Ensure that "tail -f fifo" tails indefinitely. 3 4# Copyright (C) 2009-2023 Free Software Foundation, Inc. 5 6# This program is free software: you can redistribute it and/or modify 7# it under the terms of the GNU General Public License as published by 8# the Free Software Foundation, either version 3 of the License, or 9# (at your option) any later version. 10 11# This program is distributed in the hope that it will be useful, 12# but WITHOUT ANY WARRANTY; without even the implied warranty of 13# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14# GNU General Public License for more details. 15 16# You should have received a copy of the GNU General Public License 17# along with this program. If not, see <https://www.gnu.org/licenses/>. 18 19. "${srcdir=.}/tests/init.sh"; path_prepend_ ./src 20print_ver_ tail 21 22mkfifo_or_skip_ fifo 23 24echo 1 > fifo & 25echo 1 > exp || framework_failure_ 26 27# Terminate any background tail process 28cleanup_() { kill $pid 2>/dev/null && wait $pid; } 29 30# Speedup the non inotify case 31fastpoll='-s.1 --max-unchanged-stats=1' 32 33timeout 10 tail $fastpoll -f fifo > out & pid=$! 34 35check_tail_output() { sleep $1; test -s out; } 36 37# Wait 12.7s for tail to write something. 38retry_delay_ check_tail_output .1 7 || fail=1 39 40compare exp out || fail=1 41 42# Ensure tail is still running 43kill -0 $pid || fail=1 44 45cleanup_ 46 47Exit $fail 48