#!/bin/sh
# Test that 'shred' behaves correctly on FIFOs.

# Copyright (C) 2026 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_ shred

mkfifo_or_skip_ fifo

# Test 'shred' on a FIFO with no readers.
cat <<\EOF >exp || framework_failure_
shred: fifo: invalid file type
EOF
returns_ 1 timeout 10 shred fifo >out 2>err || fail=1
compare /dev/null out || fail=1
compare exp err || fail=1

# Terminate any background processes.
cleanup_() { kill $pid 2>/dev/null && wait $pid; }

# Test 'shred' on a FIFO with a reader.  After the file descriptor is
# opened, 'cat' will be unblocked.
timeout 10 cat pipe > /dev/null & pid=$!
returns_ 1 timeout 10 shred fifo >out 2>err || fail=1
compare /dev/null out || fail=1
compare exp err || fail=1
kill -0 $pid && fail=1

Exit $fail