mirror of
git://git.sv.gnu.org/coreutils.git
synced 2026-05-31 23:06:33 +02:00
Jim Meyering
288524b39b
* NEWS: Document this bug fix. * src/copy.c (copy_reg): Read from a regular file, even if it appears (stat.st_size == 0) to be empty. This reverts an optimization introduced on 2005-11-23 for coreutils-6.0. Otherwise, "cp /proc/cpuinfo /tmp" creates an empty file, on e.g., linux-2.6.20. * tests/cp/proc-zero-len: New file. Test for the above. * tests/cp/Makefile.am (TESTS): Add proc-zero-len. Reported by Dan Berrangé.
60 lines
1.7 KiB
Bash
Executable File
60 lines
1.7 KiB
Bash
Executable File
#!/bin/sh
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# Ensure that cp copies contents of non-empty "regular" file with st_size==0
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# Copyright (C) 2007 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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if test "$VERBOSE" = yes; then
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set -x
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cp --version
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fi
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. $srcdir/../envvar-check
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pwd=`pwd`
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t0=`echo "$0"|sed 's,.*/,,'`.tmp; tmp=$t0/$$
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trap 'status=$?; cd "$pwd" && chmod -R u+rwx $t0 && rm -rf $t0 && exit $status' 0
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trap '(exit $?); exit $?' 1 2 13 15
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framework_failure=0
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mkdir -p $tmp || framework_failure=1
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cd $tmp || framework_failure=1
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touch empty || framework_failure=1
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if test $framework_failure = 1; then
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echo "$0: failure in testing framework" 1>&2
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(exit 1); exit 1
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fi
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f=/proc/cpuinfo
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test -r $f || f=empty
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fail=0
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cat $f > out || fail=1
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# With coreutils-6.9, this would create a zero-length "exp" file.
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cp $f exp || fail=1
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# Don't simply compare contents; they might differ,
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# e.g., if CPU freq changes between cat and cp invocations.
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# Instead, simply compare whether they're both nonempty.
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test -s out && { rm -f out; echo nonempty > out; }
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test -s exp && { rm -f exp; echo nonempty > exp; }
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cmp out exp || fail=1
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test $fail = 1 && diff out exp 2> /dev/null
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(exit $fail); exit $fail
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