1#!/bin/sh
2# Test 'tty'.
3
4# Copyright 2017-2023 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# Make sure there's a tty on stdin.
20. "${srcdir=.}/tests/init.sh"; path_prepend_ ./src
21print_ver_ tty
22
23if test -t 0; then
24  tty || fail=1
25  tty -s || fail=1
26fi
27
28returns_ 1 tty </dev/null || fail=1
29returns_ 1 tty -s </dev/null || fail=1
30returns_ 1 tty <&- 2>/dev/null || fail=1
31returns_ 1 tty -s <&- || fail=1
32
33returns_ 2 tty a || fail=1
34returns_ 2 tty -s a || fail=1
35
36if test -w /dev/full && test -c /dev/full; then
37  if test -t 0; then
38    returns_ 3 tty >/dev/full || fail=1
39  fi
40  returns_ 3 tty </dev/null >/dev/full || fail=1
41fi
42
43Exit $fail
44