1#!/bin/sh
2# Test for proper detection of I/O errors in seq
3
4# Copyright (C) 2016-2023 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. "${srcdir=.}/tests/init.sh"; path_prepend_ ./src
20print_ver_ seq
21
22if ! test -w /dev/full || ! test -c /dev/full; then
23  skip_ '/dev/full is required'
24fi
25
26# Run 'seq' with a timeout, preventing infinite-loop run.
27# expected returned codes:
28#  1     - seq detected an I/O error and exited with an error.
29#  124   - timed-out (seq likely infloop)
30#  other - unexpected error
31timed_seq_fail() { timeout 10 seq "$@" >/dev/full 2>/dev/null; }
32
33
34# Test infinite sequence, using fast-path method (seq_fast).
35returns_ 1 timed_seq_fail 1 inf || fail=1
36
37# Test infinite sequence, using slow-path method (print_numbers).
38returns_ 1 timed_seq_fail 1.1 .1 inf || fail=1
39
40# Test non-infinite sequence, using slow-path method (print_numbers).
41# (despite being non-infinite, the entire sequence should take long time to
42#  print. Thus, either an I/O error is detected immediately, or seq will
43#  timeout).
44returns_ 1 timed_seq_fail 1 0.0001 99999999 || fail=1
45
46Exit $fail
47