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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.
if test "$VERBOSE" = yes; then
set -x
du --version
fi
. $srcdir/../envvar-check
# Creating a 2GB file counts as `very expensive'.
. $srcdir/../very-expensive
pwd=`pwd`
t0=`echo "$0"|sed 's,.*/,,'`.tmp; tmp=$t0/$$
trap 'status=$?; cd $pwd; chmod -R u+rwx $t0; rm -rf $t0 && exit $status' 0
trap '(exit $?); exit $?' 1 2 13 15
framework_failure=0
mkdir -p $tmp || framework_failure=1
cd $tmp || framework_failure=1
if test $framework_failure = 1; then
echo "$0: failure in testing framework" 1>&2
(exit 1); exit 1
fi
fail=0
# Get number of free kilobytes on current partition, so we can
# skip this test if there is insufficient free space.
# This technique relies on the fact that the `Available' kilobyte
# count is the number just before the one with a trailing `%'.
free_kb=`df -kP .|tail -1|sed 's/ [0-9][0-9]*%.*//;s/ *$//;s/.* //'`
case "$free_kb" in
[0-9]*) ;;
*) echo "invalid size from df: $free_kb" 1>&2; (exit 77); exit 77;;
esac
# Require about 3GB free.
min_kb=3000000
test $min_kb -lt $free_kb ||
{
echo "$0: skipping this test:"
echo "too little free space on current partition: $free_kb (need $min_kb KB)" \
1>&2;
(exit 77); exit 77
}
big=big
rm -f $big
test -t 1 || printf 'creating a 2GB file...\n'
for i in `seq 100`; do
# Note: 2147483648 == 2^31. Print floor(2^31/100) per iteration.
printf %21474836s x >> $big || fail=1
# On the final iteration, append the remaining 48 bytes.
test $i = 100 && { printf %48s x >> $big || fail=1; }
test -t 1 && printf 'creating a 2GB file: %d%% complete\r' $i
done
echo
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 || fail=1
~2M
EOF
cmp out exp || fail=1
test $fail = 1 && diff out exp 2> /dev/null
(exit $fail); exit $fail
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