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#!/bin/sh
# Ensure that stty diagnoses invalid inputs, rather than silently misbehaving.
# Copyright (C) 2007-2011 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 <http://www.gnu.org/licenses/>.
. "${srcdir=.}/init.sh"; path_prepend_ ../src
print_ver_ stty
require_controlling_input_terminal_
trap '' TTOU # Ignore SIGTTOU
saved_state=`stty -g` || fail=1
stty $saved_state || fail=1
# Before coreutils-6.9.90, if stty were given an argument with 35 colons
# separating 36 hexadecimal strings, stty would fail to diagnose as invalid
# any number that was out of range as long as sscanf happened to
# overflow/wrap it back into the range of the corresponding type (either
# tcflag_t or cc_t).
# For each of the following, with coreutils-6.9 and earlier,
# stty would fail to diagnose the error on at least Solaris 10.
hex_2_64=10000000000000000
stty `echo $saved_state |sed 's/^[^:]*:/'$hex_2_64:/` 2>/dev/null && fail=1
stty `echo $saved_state |sed 's/:[0-9a-f]*$/:'$hex_2_64/` 2>/dev/null && fail=1
# Just in case either of the above mistakenly succeeds (and changes
# the state of our tty), try to restore the initial state.
stty $saved_state || fail=1
Exit $fail
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