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#!/bin/sh
# Ensure that cat outputs processed data immediately.
# Copyright (C) 2009-2020 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_ cat
# Use a fifo rather than a pipe in the tests below
# so that the producer (cat) will wait until the
# consumer (dd) opens the fifo therefore increasing
# the chance that dd will read the data from each
# write separately.
mkfifo_or_skip_ fifo
# Terminate any background cp process
cleanup_() { kill $pid 2>/dev/null && wait $pid; }
echo 1 > exp
cat_buf_1()
{
local delay="$1"
> out || framework_failure_
dd count=1 if=fifo > out & pid=$!
(echo 1; sleep $delay; echo 2) | cat -v > fifo
wait $pid
compare exp out
}
retry_delay_ cat_buf_1 .1 6 || fail=1
Exit $fail
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