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#! /bin/sh
# Make sure stty can parse most of its options.
if test "$VERBOSE" = yes; then
set -x
stty --version
fi
# The following list of reversible options was generated with
# grep -w REV stty.c|sed -n '/^ {"/{s//REV_/;s/".*/=1/;p;}'|fmt
REV_parenb=1 REV_parodd=1 REV_hupcl=1 REV_hup=1 REV_cstopb=1 REV_cread=1
REV_clocal=1 REV_crtscts=1 REV_ignbrk=1 REV_brkint=1 REV_ignpar=1
REV_parmrk=1 REV_inpck=1 REV_istrip=1 REV_inlcr=1 REV_igncr=1 REV_icrnl=1
REV_ixon=1 REV_ixoff=1 REV_tandem=1 REV_iuclc=1 REV_ixany=1 REV_imaxbel=1
REV_opost=1 REV_olcuc=1 REV_ocrnl=1 REV_onlcr=1 REV_onocr=1 REV_onlret=1
REV_ofill=1 REV_ofdel=1 REV_isig=1 REV_icanon=1 REV_iexten=1 REV_echo=1
REV_echoe=1 REV_crterase=1 REV_echok=1 REV_echonl=1 REV_noflsh=1
REV_xcase=1 REV_tostop=1 REV_echoprt=1 REV_prterase=1 REV_echoctl=1
REV_ctlecho=1 REV_echoke=1 REV_crtkill=1 REV_evenp=1 REV_parity=1
REV_oddp=1 REV_nl=1 REV_cooked=1 REV_raw=1 REV_pass8=1 REV_litout=1
REV_cbreak=1 REV_decctlq=1 REV_tabs=1 REV_lcase=1 REV_LCASE=1
fail=0
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.
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 parenb' and `stty -parenb' fail with this message
# stty: standard input: unable to perform all requested operations
# on Linux 2.2.0-pre4 kernels, so skip those tests.
test $opt = parenb && continue
stty $opt || fail=1
# Likewise, `stty -cread' would fail, so skip that, too.
test $opt = cread && continue
rev=`eval echo "\\\$REV_$opt"`
if test -n "$rev"; then
stty -$opt || { fail=1; echo -$opt; }
fi
done
if test -n "$RUN_LONG_TESTS"; then
# Take them in pairs.
for opt1 in $options; do
echo .|tr -d '\012'
for opt2 in $options; do
stty $opt1 $opt2 || fail=1
rev1=`eval echo "\\\$REV_$opt1"`
rev2=`eval echo "\\\$REV_$opt2"`
if test -n "$rev1"; then
stty -$opt1 $opt2 || fail=1
fi
if test -n "$rev2"; then
stty $opt1 -$opt2 || fail=1
fi
if test "$rev1$rev2" = 11; then
stty -$opt1 -$opt2 || fail=1
fi
done
done
fi
stty `cat $saved_state`
rm -f $saved_state
exit $fail
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