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Diffstat (limited to 'tests/tail-2/inotify-rotate.sh')
-rwxr-xr-x | tests/tail-2/inotify-rotate.sh | 77 |
1 files changed, 77 insertions, 0 deletions
diff --git a/tests/tail-2/inotify-rotate.sh b/tests/tail-2/inotify-rotate.sh new file mode 100755 index 0000000..0f1dc42 --- /dev/null +++ b/tests/tail-2/inotify-rotate.sh @@ -0,0 +1,77 @@ +#!/bin/sh +# ensure that tail -F handles rotation + +# Copyright (C) 2009-2020 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/>. + +. "${srcdir=.}/tests/init.sh"; path_prepend_ ./src +print_ver_ tail + +grep '^#define HAVE_INOTIFY 1' "$CONFIG_HEADER" >/dev/null \ + || expensive_ + +check_tail_output() +{ + local delay="$1" + grep "$tail_re" out > /dev/null || + { sleep $delay; return 1; } +} + +# Wait up to 25.5 seconds for grep REGEXP 'out' to succeed. +grep_timeout() { tail_re="$1" retry_delay_ check_tail_output .1 8; } + +# Terminate any background tail process +cleanup_() { kill $pid 2>/dev/null && wait $pid; } + +cleanup_fail() +{ + cat out + warn_ $1 + cleanup_ + fail=1 +} + +# Speedup the non inotify case +fastpoll='-s.1 --max-unchanged-stats=1' + +# Perform at least this many iterations, because on multi-core systems +# the offending sequence of events can be surprisingly uncommon. +# See: https://lists.gnu.org/r/bug-coreutils/2009-11/msg00213.html +for i in $(seq 50); do + echo $i + rm -f k x out + + # Normally less than a second is required here, but with heavy load + # and a lot of disk activity, even 20 seconds is insufficient, which + # leads to this timeout killing tail before the "ok" is written below. + >k && >x || framework_failure_ failed to initialize files + timeout 60 tail $fastpoll -F k > out 2>&1 & pid=$! + + echo 'tailed' > k; + # wait for 'tailed' to appear in out + grep_timeout 'tailed' || { cleanup_fail 'failed to find "tailed"'; break; } + + mv x k + # wait for tail to detect the rename + grep_timeout 'tail:' || { cleanup_fail 'failed to detect rename'; break; } + + echo ok >> k + # wait for "ok" to appear in 'out' + grep_timeout 'ok' || { cleanup_fail 'failed to detect echoed ok'; break; } + + cleanup_ +done + +Exit $fail |