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#!/bin/sh
# Check that grep doesn't mishandle long matching lines.
. "${srcdir=.}/init.sh"; path_prepend_ ../src
expensive_
# Create a one-line file containing slightly more than 2 GiB.
echo x | dd bs=1024k seek=2048 >2G-plus-2 || framework_failure_
skip_diagnostic=
# These two patterns catch different kinds of
# failures due to internal integer overflows.
# However, the second one, '^.*x\(\)\1', provokes
# so much memory consumption via regexec.c that it renders
# some systems unusable.
for pattern in '^.*'; do
diagnostic=$(LC_ALL=C grep -a "$pattern" 2G-plus-2 2>&1 >/dev/null)
status=$?
case $status,$diagnostic in
0,*) ;;
2,*': line too long for re_search')
skip_diagnostic='regular expression library cannot handle the test' ;;
137,''|2,*': memory exhausted')
# The 137/no-diagnostic arises when the kernel OOM-kills grep.
skip_diagnostic='not enough main memory to run the test' ;;
*) fail=1 ;;
esac
done
case $fail,$skip_diagnostic in
0,?*) skip_ "$skip_diagnostic" ;;
esac
Exit $fail
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