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46 lines
1.3 KiB
Bash
Executable File
46 lines
1.3 KiB
Bash
Executable File
#!/bin/sh
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# This test would fail with tail from pre-1.22i textutils.
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# Copyright (C) 1999, 2002, 2006-2011 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 <http://www.gnu.org/licenses/>.
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. "${srcdir=.}/init.sh"; path_prepend_ ../src
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print_ver_ tail
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yes > t &
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yes_pid=$!
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while :; do
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test -s t && break
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sleep .1
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done
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tail -n 1 t &
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tail_pid=$!
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kill $yes_pid
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# This test is racy, and can fail under unusual circumstances.
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# On a very busy system, tail will fail to notice that $yes_pid is gone.
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# Then the following kill will succeed and cause this test to fail.
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# Wait for up to 3 seconds for tail to detect the death of $yes_pid.
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for i in $(seq 30); do
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kill -0 $tail_pid || break
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echo sleep 0.1s
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sleep .1
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done
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kill $tail_pid && fail=1 || :
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Exit $fail
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