47 lines
1.3 KiB
Bash
Executable file
47 lines
1.3 KiB
Bash
Executable file
#!/bin/sh
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# Ensure that "tail -f fifo" tails indefinitely.
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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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mkfifo_or_skip_ fifo
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echo 1 > fifo &
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echo 1 > exp || framework_failure_
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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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# Speedup the non inotify case
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fastpoll='-s.1 --max-unchanged-stats=1'
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timeout 10 tail $fastpoll -f fifo > out & pid=$!
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check_tail_output() { sleep $1; test -s out; }
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# Wait 12.7s for tail to write something.
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retry_delay_ check_tail_output .1 7 || fail=1
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compare exp out || fail=1
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# Ensure tail is still running
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kill -0 $pid || fail=1
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cleanup_
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Exit $fail
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