2
# Ensure that tail does not ignore data that is appended to a tailed-forever
3
# file between tail's initial read-to-EOF, and when the inotify watches
4
# are established in tail_forever_inotify. That data could be ignored
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# indefinitely if no *other* data is appended, but it would be printed as
6
# soon as any additional appended data is detected.
8
# Copyright (C) 2009-2011 Free Software Foundation, Inc.
10
# 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
12
# the Free Software Foundation, either version 3 of the License, or
13
# (at your option) any later version.
15
# This program is distributed in the hope that it will be useful,
16
# but WITHOUT ANY WARRANTY; without even the implied warranty of
17
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18
# GNU General Public License for more details.
20
# You should have received a copy of the GNU General Public License
21
# along with this program. If not, see <http://www.gnu.org/licenses/>.
23
. "${srcdir=.}/init.sh"; path_prepend_ ../src
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# Don't run this test by default because sometimes it's skipped as noted below.
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# Also gdb has a bug in Debian's gdb-6.8-3 at least that causes it to not
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# cleanup and exit correctly when it receives a SIGTERM, thus hanging the test.
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touch file || framework_failure_
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touch tail.out || framework_failure_
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( timeout 10s gdb --version ) > gdb.out 2>&1
35
case $(cat gdb.out) in
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*) skip_ "can't run gdb";;
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# See if gdb works and
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# tail_forever_inotify is compiled and not inlined
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timeout 10s gdb -nx --batch-silent \
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--eval-command='break tail_forever_inotify' \
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--eval-command='run -f file' \
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--eval-command='quit' \
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tail < /dev/null > gdb.out 2>&1
48
# FIXME: The above is seen to _intermittently_ fail with:
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# warning: .dynamic section for "/lib/libc.so.6" is not at the expected address
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# warning: difference appears to be caused by prelink, adjusting expectations
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test -s gdb.out && { cat gdb.out; skip_ "can't set breakpoints in tail"; }
53
# Run "tail -f file", stopping to append a line just before
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# inotify initialization, and then continue. Before the fix,
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# that just-appended line would never be output.
56
timeout 10s gdb -nx --batch-silent \
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--eval-command='break tail_forever_inotify' \
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--eval-command='run -f file >> tail.out' \
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--eval-command="shell echo never-seen-with-tail-7.5 >> file" \
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--eval-command='continue' \
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--eval-command='quit' \
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tail < /dev/null > /dev/null 2>&1 &
65
tail --pid=$pid -f tail.out | (read; kill $pid)
67
test -s tail.out || fail=1