tests/stty/stty-invalid.sh

   1 #!/bin/sh
   2 # Ensure that stty diagnoses invalid inputs, rather than silently misbehaving.
   3
   4 # Copyright (C) 2007-2024 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 . "${srcdir=.}/tests/init.sh"; path_prepend_ ./src
  20 print_ver_ stty
  21 require_controlling_input_terminal_
  22 require_trap_signame_
  23
  24 trap '' TTOU # Ignore SIGTTOU
  25
  26
  27 saved_state=$(stty -g) || fail=1
  28 stty $saved_state || fail=1
  29
  30 # Before coreutils-6.9.90, if stty were given an argument with 35 colons
  31 # separating 36 hexadecimal strings, stty would fail to diagnose as invalid
  32 # any number that was out of range as long as sscanf happened to
  33 # overflow/wrap it back into the range of the corresponding type (either
  34 # tcflag_t or cc_t).
  35
  36 # For each of the following, with coreutils-6.9 and earlier,
  37 # stty would fail to diagnose the error on at least Solaris 10.
  38 hex_2_64=10000000000000000
  39 returns_ 1 stty $(echo $saved_state |sed 's/^[^:]*:/'$hex_2_64:/) \
  40   2>/dev/null || fail=1
  41 returns_ 1 stty $(echo $saved_state |sed 's/:[0-9a-f]*$/:'$hex_2_64/) \
  42   2>/dev/null || fail=1
  43
  44 # From coreutils 5.3.0 to 8.28, the following would crash
  45 # due to incorrect argument handling.
  46 if tty -s </dev/tty; then
  47   returns_ 1 stty eol -F /dev/tty || fail=1
  48   returns_ 1 stty -F /dev/tty eol || fail=1
  49   returns_ 1 stty -F/dev/tty eol || fail=1
  50   returns_ 1 stty eol -F/dev/tty eol || fail=1
  51 fi
  52
  53 # coreutils <= 9.1 would not validate speeds to ispeed or ospeed
  54 returns_ 1 stty ispeed 420 || fail=1
  55
  56 # Just in case either of the above mistakenly succeeds (and changes
  57 # the state of our tty), try to restore the initial state.
  58 stty $saved_state || fail=1
  59
  60 Exit $fail