1#!/bin/sh 2# Ensure that cut does not allocate mem for large ranges 3 4# Copyright (C) 2012-2023 Free Software Foundation, Inc. 5 6# This program is free software: you can redistribute it and/or modify 7# it under the terms of the GNU General Public License as published by 8# the Free Software Foundation, either version 3 of the License, or 9# (at your option) any later version. 10 11# This program is distributed in the hope that it will be useful, 12# but WITHOUT ANY WARRANTY; without even the implied warranty of 13# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14# GNU General Public License for more details. 15 16# You should have received a copy of the GNU General Public License 17# along with this program. If not, see <https://www.gnu.org/licenses/>. 18 19. "${srcdir=.}/tests/init.sh"; path_prepend_ ./src 20print_ver_ cut 21getlimits_ 22 23vm=$(get_min_ulimit_v_ returns_ 0 cut -b1 /dev/null) \ 24 || skip_ "this shell lacks ulimit support" 25 26# Ensure we can cut up to our sentinel value. 27# Don't use expr to subtract one, 28# since UINTMAX_MAX may exceed its maximum value. 29CUT_MAX=$(expr $UINTMAX_MAX - 1) || framework_failure_ 30 31# From coreutils-8.10 through 8.20, this would make cut try to allocate 32# a 256MiB bit vector. 33(ulimit -v $vm && cut -b$CUT_MAX- /dev/null > err 2>&1) || fail=1 34 35# Up to and including coreutils-8.21, cut would allocate possibly needed 36# memory upfront. Subsequently extra memory is no longer needed. 37(ulimit -v $vm && cut -b1-$CUT_MAX /dev/null >> err 2>&1) || fail=1 38 39# Explicitly disallow values above CUT_MAX 40(ulimit -v $vm && returns_ 1 cut -b$UINTMAX_MAX /dev/null 2>/dev/null) || 41 fail=1 42(ulimit -v $vm && returns_ 1 cut -b$UINTMAX_OFLOW /dev/null 2>/dev/null) || 43 fail=1 44 45compare /dev/null err || fail=1 46 47Exit $fail 48