tests/misc/stty-invalid

   1 #!/bin/sh
   2 # Ensure that stty diagnoses invalid inputs, rather than silently misbehaving.
   3
   4 # Copyright (C) 2007-2011 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 <http://www.gnu.org/licenses/>.
  18
  19 . "${srcdir=.}/init.sh"; path_prepend_ ../src
  20 print_ver_ stty
  21 require_controlling_input_terminal_
  22 trap '' TTOU # Ignore SIGTTOU
  23
  24
  25 saved_state=`stty -g` || fail=1
  26 stty $saved_state || fail=1
  27
  28 # Before coreutils-6.9.90, if stty were given an argument with 35 colons
  29 # separating 36 hexadecimal strings, stty would fail to diagnose as invalid
  30 # any number that was out of range as long as sscanf happened to
  31 # overflow/wrap it back into the range of the corresponding type (either
  32 # tcflag_t or cc_t).
  33
  34 # For each of the following, with coreutils-6.9 and earlier,
  35 # stty would fail to diagnose the error on at least Solaris 10.
  36 hex_2_64=10000000000000000
  37 stty `echo $saved_state |sed 's/^[^:]*:/'$hex_2_64:/`     2>/dev/null && fail=1
  38 stty `echo $saved_state |sed 's/:[0-9a-f]*$/:'$hex_2_64/` 2>/dev/null && fail=1
  39
  40 # Just in case either of the above mistakenly succeeds (and changes
  41 # the state of our tty), try to restore the initial state.
  42 stty $saved_state || fail=1
  43
  44 Exit $fail