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#!/bin/sh
# Test use of compression by sort
# Copyright (C) 2007-2025 Free Software Foundation, Inc.
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <https://www.gnu.org/licenses/>.
. "${srcdir=.}/tests/init.sh"; path_prepend_ ./src
print_ver_ sort
require_trap_signame_
seq -w 2000 > exp || framework_failure_
tac exp > in || framework_failure_
# This should force the use of temp files
sort -S 1k in > out || fail=1
compare exp out || fail=1
# Create our own gzip program that will be used as the default
cat <<EOF > gzip || framework_failure_
#!$SHELL
tr 41 14
touch ok
EOF
chmod +x gzip
# Ensure 'sort' is immune to parent's SIGCHLD handler
# Use a subshell and an exec to work around a bug in FreeBSD 5.0 /bin/sh.
(
trap '' CHLD
# This should force the use of child processes for "compression"
PATH=.:$PATH exec sort -S 1k --compress-program=gzip in > /dev/null
) || fail=1
# This will find our new gzip in PATH
PATH=.:$PATH sort -S 1k --compress-program=gzip in > out || fail=1
compare exp out || fail=1
test -f ok || fail=1
rm -f ok
# This is to make sure it works with no compression.
PATH=.:$PATH sort -S 1k in > out || fail=1
compare exp out || fail=1
test -f ok && fail=1
# This is to make sure we can use something other than gzip
mv gzip dzip || fail=1
sort --compress-program=./dzip -S 1k in > out || fail=1
compare exp out || fail=1
test -f ok || fail=1
rm -f ok
# Make sure it can find other programs in PATH correctly
PATH=.:$PATH sort --compress-program=dzip -S 1k in > out || fail=1
compare exp out || fail=1
test -f ok || fail=1
rm -f dzip ok
# Check the behavior of 'sort' when the program specified by --compress-program
# does not exist.
cat <<\EOF > exp-err
sort: could not run compress program 'missing': No such file or directory
EOF
sort --compress-program=missing -S 1k in > out 2> err || fail=1
compare exp out || fail=1
compare exp-err err || fail=1
Exit $fail
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