coreutils/tests/stty/basic-1

#! /bin/sh
# Make sure stty can parse most of its options.

reversible ()
{
  case $1 in
    # The following list of reversible options was generated with
    # grep -w REV stty.c |grep '{"' |sed 's/....//;s/".*//' \
    #   |fmt |tr ' ' '|' |sed 's/$/) ;;/'
    parenb|parodd|hupcl|hup|cstopb|cread|clocal|crtscts|ignbrk|brkint|ignpar) ;;
    parmrk|inpck|istrip|inlcr|igncr|icrnl|ixon|ixoff|tandem|iuclc|ixany) ;;
    imaxbel|opost|olcuc|ocrnl|onlcr|onocr|onlret|ofill|ofdel|isig|icanon) ;;
    iexten|echo|echoe|crterase|echok|echonl|noflsh|xcase|tostop|echoprt) ;;
    prterase|echoctl|ctlecho|echoke|crtkill|evenp|parity|oddp|nl|cooked|raw) ;;
    pass8|litout|cbreak|decctlq|tabs|lcase|LCASE) ;;

    *) echo no; return;;
  esac

  echo yes;
}

: ${STTY=stty}

if test "$VERBOSE" = yes; then
  set -x
  $RM --version
fi

saved_state=.saved-state
$STTY --save > $saved_state || exit 1
trap "status=$?; $STTY `cat $saved_state`; exit $status" 0 1 2 3 15
$STTY `cat $saved_state` || exit 1

# Build a list of all boolean options stty accepts on this system.
options=`stty -a|tail +2|tr ';' '\012'|sed '/ = /d;s/^ //'|tr -s ' -' '\012'`

# Take them one at a time, with and without the leading `-'.
for opt in $options; do
  $STTY $opt || exit 1
  if test `reversible $opt` = yes; then
    $STTY -$opt || exit 1
  fi
done

# Take them in pairs.
for opt1 in $options; do
  echo .|tr -d '\012'
  for opt2 in $options; do

    $STTY $opt1 $opt2 || exit 1

    test `reversible $opt1` = yes && rev1=yes || rev1=no
    test `reversible $opt2` = yes && rev2=yes || rev2=no
    if test $rev1 = yes; then
      $STTY -$opt1 $opt2 || exit 1
    fi
    if test $rev2 = yes; then
      $STTY $opt1 -$opt2 || exit 1
    fi
    if test "$rev1$rev2" = yesyes; then
      $STTY -$opt1 -$opt2 || exit 1
    fi
  done
done

exit 0