File: vredir4.sub

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bash 5.0-4
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file content (22 lines) | stat: -rw-r--r-- 182 bytes parent folder | download | duplicates (4) 
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swizzle()
{
fd0=0
fd1=1

exec {stdin}<&$fd0
exec {stdout}>&$fd1
}

swizzle
echo $stdin $stdout

read line <&$stdin <<EOF
a
EOF

echo $line
echo $line >&$stdout

type swizzle

exit 0