1#!/bin/sh
2# Ensure that cat outputs processed data immediately.
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_ cat
21
22# Use a fifo rather than a pipe in the tests below
23# so that the producer (cat) will wait until the
24# consumer (dd) opens the fifo therefore increasing
25# the chance that dd will read the data from each
26# write separately.
27mkfifo_or_skip_ fifo
28
29# Terminate any background cp process
30cleanup_() { kill $pid 2>/dev/null && wait $pid; }
31
32echo 1 > exp
33
34cat_buf_1()
35{
36  local delay="$1"
37
38  > out || framework_failure_
39  dd count=1 if=fifo > out & pid=$!
40  (echo 1; sleep $delay; echo 2) | cat -v > fifo
41  wait $pid
42  compare exp out
43}
44
45retry_delay_ cat_buf_1 .1 6 || fail=1
46
47Exit $fail
48