1#!/bin/sh 2# Tests for file descriptor exhaustion. 3 4# Copyright (C) 2009-2023 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_ sort 21 22# This script uses 'ulimit -n 7' to limit 'sort' to at most 7 open files: 23# stdin, stdout, stderr, two input and one output files when merging, 24# and an extra. The extra is for old-fashioned platforms like Solaris 10 25# where opening a temp file also requires opening /dev/urandom to 26# calculate the temp file's name. 27 28# Skip the test when running under valgrind. 29( ulimit -n 7; sort 3<&- 4<&- 5<&- 6<&- < /dev/null ) \ 30 || skip_ 'fd-limited sort failed; are you running under valgrind?' 31 32for i in $(seq 31); do 33 echo $i | tee -a in > __test.$i || framework_failure_ 34done 35 36# glob before ulimit to avoid issues on bash 3.2 on OS X 10.6.8 at least 37test_files=$(echo __test.*) 38 39( 40 ulimit -n 7 41 sort -n -m $test_files 3<&- 4<&- 5<&- 6<&- < /dev/null > out 42) && 43compare in out || 44 { fail=1; echo 'file descriptor exhaustion not handled' 1>&2; } 45 46echo 32 | tee -a in > in1 47( 48 ulimit -n 7 49 sort -n -m $test_files - 3<&- 4<&- 5<&- 6<&- < in1 > out 50) && 51compare in out || { fail=1; echo 'stdin not handled properly' 1>&2; } 52 53Exit $fail 54