1 files changed, 65 insertions, 0 deletions
diff --git a/tests/misc/stty-pairs.sh b/tests/misc/stty-pairs.sh
new file mode 100755
index 0000000..cf12559
--- /dev/null
+++ b/tests/misc/stty-pairs.sh
@@ -0,0 +1,65 @@
+#!/bin/sh
+# Make sure stty can parse most of its options - in pairs [expensive].
+
+# Copyright (C) 1998-2018 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/>.
+
+. "${srcdir=.}/tests/init.sh"; path_prepend_ ./src
+print_ver_ stty
+
+expensive_
+
+# Make sure there's a tty on stdin.
+require_controlling_input_terminal_
+require_trap_signame_
+
+trap '' TTOU # Ignore SIGTTOU
+
+# Get the reversible settings from stty.c.
+stty_reversible_init_
+
+saved_state=.saved-state
+stty --save > $saved_state || fail=1
+stty $(cat $saved_state) || fail=1
+
+# Build a list of all boolean options stty accepts on this system.
+# Don't depend on terminal width.  Put each option on its own line,
+# remove all non-boolean ones, remove 'parenb' and 'cread' explicitly,
+# then remove any leading hyphens.
+sed_del='/^speed/d;/^rows/d;/^columns/d;/ = /d;s/parenb//;s/cread//'
+options=$(stty -a | tr -s ';' '\n' | sed "s/^ //;$sed_del;s/-//g")
+
+# Take them in pairs, with and without the leading '-'.
+for opt1 in $options; do
+  for opt2 in $options; do
+
+    stty $opt1 $opt2 || fail=1
+
+    if stty_reversible_query_ "$opt1" ; then
+      stty -$opt1 $opt2 || fail=1
+    fi
+    if stty_reversible_query_ "$opt2" ; then
+      stty $opt1 -$opt2 || fail=1
+    fi
+    if stty_reversible_query_ "$opt1" \
+        && stty_reversible_query_ "$opt2" ; then
+      stty -$opt1 -$opt2 || fail=1
+    fi
+  done
+done
+
+stty $(cat $saved_state)
+
+Exit $fail