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#!/bin/sh
# Test 'tty'.
# Copyright 2017-2020 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/>.
# Make sure there's a tty on stdin.
. "${srcdir=.}/tests/init.sh"; path_prepend_ ./src
print_ver_ tty
if test -t 0; then
tty || fail=1
tty -s || fail=1
fi
returns_ 1 tty </dev/null || fail=1
returns_ 1 tty -s </dev/null || fail=1
returns_ 1 tty <&- 2>/dev/null || fail=1
returns_ 1 tty -s <&- || fail=1
returns_ 2 tty a || fail=1
returns_ 2 tty -s a || fail=1
if test -w /dev/full && test -c /dev/full; then
if test -t 0; then
returns_ 3 tty >/dev/full || fail=1
fi
returns_ 3 tty </dev/null >/dev/full || fail=1
fi
Exit $fail
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