i-bash/tests/vredir7.sub

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swizzle()
{
exec {fd[0]}<&0
exec {fd[1]}>&1
exec {stdin}<&${fd[0]}-
exec {stdout}>&${fd[1]}-
}
swizzle
echo $stdin $stdout
read line <&$stdin <<EOF
a
EOF
echo $line
echo $line >&$stdout
type swizzle
exit 0