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28b176085f
Update to latest gnulib with new copyright year. Run "make update-copyright" and then... * gnulib: Update included in this commit as copyright years are the only change from the previous gnulib commit. * tests/init.sh: Sync with gnulib to pick up copyright year. * bootstrap: Likewise. * tests/sample-test: Adjust to use the single most recent year.
78 lines
2.3 KiB
Bash
Executable File
78 lines
2.3 KiB
Bash
Executable File
#!/bin/sh
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# ensure that tail -F handles rotation
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# Copyright (C) 2009-2025 Free Software Foundation, Inc.
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <https://www.gnu.org/licenses/>.
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. "${srcdir=.}/tests/init.sh"; path_prepend_ ./src
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print_ver_ tail
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grep '^#define HAVE_INOTIFY 1' "$CONFIG_HEADER" >/dev/null \
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|| expensive_
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check_tail_output()
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{
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local delay="$1"
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grep "$tail_re" out > /dev/null ||
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{ sleep $delay; return 1; }
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}
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# Wait up to 25.5 seconds for grep REGEXP 'out' to succeed.
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grep_timeout() { tail_re="$1" retry_delay_ check_tail_output .1 8; }
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# Terminate any background tail process
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cleanup_() { kill $pid 2>/dev/null && wait $pid; }
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cleanup_fail()
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{
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cat out
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warn_ $1
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cleanup_
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fail=1
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}
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# Speedup the non inotify case
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fastpoll='-s.1 --max-unchanged-stats=1'
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# Perform at least this many iterations, because on multi-core systems
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# the offending sequence of events can be surprisingly uncommon.
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# See: https://lists.gnu.org/r/bug-coreutils/2009-11/msg00213.html
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for i in $(seq 50); do
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echo $i
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rm -f k x out
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# Normally less than a second is required here, but with heavy load
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# and a lot of file system activity, even 20 seconds is insufficient, which
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# leads to this timeout killing tail before the "ok" is written below.
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>k && >x || framework_failure_ failed to initialize files
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timeout 60 tail $fastpoll -F k > out 2>&1 & pid=$!
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echo 'tailed' > k;
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# wait for 'tailed' to appear in out
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grep_timeout 'tailed' || { cleanup_fail 'failed to find "tailed"'; break; }
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mv x k
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# wait for tail to detect the rename
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grep_timeout 'tail:' || { cleanup_fail 'failed to detect rename'; break; }
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echo ok >> k
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# wait for "ok" to appear in 'out'
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grep_timeout 'ok' || { cleanup_fail 'failed to detect echoed ok'; break; }
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cleanup_
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done
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Exit $fail
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