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a966dcdb69
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: Manually update copyright year, until we fully sync with gnulib at a later stage. * tests/sample-test: Adjust to use the single most recent year.
51 lines
1.6 KiB
Bash
Executable File
51 lines
1.6 KiB
Bash
Executable File
#!/bin/sh
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# Demonstrate a bug in 'tail -cN' when operating on files of size 4G and larger
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# Fixed in coreutils-4.5.2.
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# Copyright (C) 2002-2024 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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. "${srcdir=.}/tests/init.sh"; path_prepend_ ./src
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print_ver_ tail
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expensive_
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# Create a file of size exactly 4GB (2^32) with 8 bytes
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# at the beginning and another set of 8 bytes at the end.
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# The rest will be NUL bytes. On most modern systems, the following
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# creates a file that takes up only a few KB. Here, du -sh says 16K.
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echo abcdefgh | tr -d '\n' > big || framework_failure_
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echo 87654321 | tr -d '\n' > tmp || framework_failure_
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# Seek 4GB - 8
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dd bs=1 seek=4294967288 if=tmp of=big 2> err || dd_failed=1
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if test "$dd_failed" = 1; then
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cat err 1>&2
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skip_ \
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'cannot create a file large enough for this test,
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possibly because this system does not support large files;
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Consider rerunning this test on a different file system.'
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fi
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tail -c1 big > out || fail=1
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# Append a newline.
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echo >> out
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cat <<\EOF > exp
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1
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EOF
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compare exp out || fail=1
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Exit $fail
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