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# -*- sh -*-
if (FOO=FOO; unset FOO) >/dev/null 2>&1; then
as_unset=unset
else
as_unset=false
fi
envvar_check_failed=0
vars='
BLOCKSIZE
BLOCK_SIZE
DF_BLOCK_SIZE
DU_BLOCK_SIZE
LS_BLOCK_SIZE
SIMPLE_BACKUP_SUFFIX
VERSION_CONTROL
'
for var in $vars
do
$as_unset $var
if eval test \"\${$var+set}\" = set; then
echo "$0: the $var environment variable is set --" \
' unset it and rerun this test' >&2
envvar_check_failed=1
fi
done
test "$envvar_check_fail" = 1 && exit 1
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