2 # Ensure that stty diagnoses invalid inputs, rather than silently misbehaving.
4 # Copyright (C) 2007-2008 Free Software Foundation, Inc.
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.
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.
16 # You should have received a copy of the GNU General Public License
17 # along with this program. If not, see <http://www.gnu.org/licenses/>.
19 if test "$VERBOSE" = yes; then
25 require_controlling_input_terminal_
29 saved_state=`stty -g` || fail=1
30 stty $saved_state || fail=1
32 # Before coreutils-6.9.90, if stty were given an argument with 35 colons
33 # separating 36 hexadecimal strings, stty would fail to diagnose as invalid
34 # any number that was out of range as long as sscanf happened to
35 # overflow/wrap it back into the range of the corresponding type (either
38 # For each of the following, with coreutils-6.9 and earlier,
39 # stty would fail to diagnose the error on at least Solaris 10.
40 hex_2_64=10000000000000000
41 stty `echo $saved_state |sed 's/^[^:]*:/'$hex_2_64:/` 2>/dev/null && fail=1
42 stty `echo $saved_state |sed 's/:[0-9a-f]*$/:'$hex_2_64/` 2>/dev/null && fail=1
44 # Just in case either of the above mistakenly succeeds (and changes
45 # the state of our tty), try to restore the initial state.
46 stty $saved_state || fail=1
48 (exit $fail); exit $fail