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#!/bin/sh
# Ensure that du can handle a 2GB file (i.e., a file of size 2^31 bytes)
# Before coreutils-5.93, on systems with a signed, 32-bit stat.st_blocks
# one of du's computations would overflow.
# Copyright (C) 2005-2020 Free Software Foundation, Inc.
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <https://www.gnu.org/licenses/>.
. "${srcdir=.}/tests/init.sh"; path_prepend_ ./src
print_ver_ du
# Creating a 2GB file counts as 'very expensive'.
very_expensive_
# Get number of free kilobytes on current partition, so we can
# skip this test if there is insufficient free space.
free_kb=$(df -k --output=avail . | tail -n1)
case "$free_kb" in
[0-9]*) ;;
*) skip_ "invalid size from df: $free_kb";;
esac
# Require about 3GB free.
min_kb=3000000
test $min_kb -lt $free_kb ||
{
skip_ \
"too little free space on current partition: $free_kb (need $min_kb KB)"
}
big=big
if ! fallocate -l2G $big; then
rm -f $big
{
is_local_dir_ . || skip_ 'Not writing 2GB data to remote'
for i in $(seq 100); do
# Note: 2147483648 == 2^31. Print floor(2^31/100) per iteration.
printf %21474836s x || fail=1
done
# After the final iteration, append the remaining 48 bytes.
printf %48s x || fail=1
} > $big || fail=1
fi
# The allocation may be done asynchronously (BTRFS for example)
sync $big || framework_failure_
du -k $big > out1 || fail=1
rm -f $big
sed 's/^2[0-9][0-9][0-9][0-9][0-9][0-9] '$big'$/~2M/' out1 > out
cat <<\EOF > exp || framework_failure_
~2M
EOF
compare exp out || fail=1
Exit $fail
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