1#!/bin/sh 2# Ensure all logs are output upon file truncation 3 4# Copyright (C) 2015-2023 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 22check_tail_output() 23{ 24 local delay="$1" 25 grep "$tail_re" out > /dev/null || 26 { sleep $delay; return 1; } 27} 28 29# Terminate any background tail process 30cleanup_() { kill $pid 2>/dev/null && wait $pid; } 31 32# Speedup the non inotify case 33fastpoll='-s.1 --max-unchanged-stats=1' 34 35for follow in '-f' '-F'; do 36 for mode in '' '---disable-inotify'; do 37 rm -f out 38 seq 10 > f || framework_failure_ 39 40 tail $follow $mode $fastpoll f > out 2>&1 & pid=$! 41 42 # Wait up to 12.7s for tail to start 43 tail_re='^10$' retry_delay_ check_tail_output .1 7 || 44 { cat out; fail=1; } 45 46 seq 11 15 > f || framework_failure_ 47 48 # Wait up to 12.7s for new data 49 tail_re='^15$' retry_delay_ check_tail_output .1 7 || 50 { cat out; fail=1; } 51 52 cleanup_ 53 done 54done 55 56Exit $fail 57