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e0afeb0099
Run "make update-copyright" and then... * tests/sample-test: Adjust to use the single most recent year. * tests/du/bind-mount-dir-cycle-v2.sh: Fix case in copyright message, so that year is updated automatically in future.
47 lines
1.5 KiB
Bash
Executable File
47 lines
1.5 KiB
Bash
Executable File
#!/bin/sh
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# ensure that mv doesn't first unlink its destination in one particular case
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# Copyright (C) 2006-2015 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=.}/tests/init.sh"; path_prepend_ ./src
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print_ver_ mv
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require_strace_ unlink
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# Before the fix, mv would unnecessarily unlink the destination symlink:
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# $ rm -rf s[12]; ln -s / s1; ln -s /tmp s2
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# $ strace -qe unlink /bin/mv -T s1 s2
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# unlink("s2") = 0
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#
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# With the fix, it doesn't call unlink:
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# $ rm -rf s[12]; ln -s / s1; ln -s /tmp s2
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# $ strace -qe unlink ./mv -T s1 s2
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# $
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ln -s t1 s1 || framework_failure_
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ln -s t2 s2 || framework_failure_
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strace -qe unlink mv -T s1 s2 > out 2>&1 || fail=1
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$EGREP 'unlink.*"s1"' out && fail=1
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# Ensure that the source, s1, is gone.
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ls -dl s1 > /dev/null 2>&1 && fail=1
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# Ensure that the destination, s2, contains the link from s1.
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test "$(readlink s2)" = t1 || fail=1
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Exit $fail
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