Выборка строк из файла между символами ? &

#!/bin/bash

function data()
{
cat <<EOF
b?s= text1 b&s ...... b?s= text2 b&s ...... b?s= text3 b&s ...... b?s= text4 b&s ...... b?s= text5 b&s ...... b?s= text6 b&s ......
....................................
b?s= text7 b&s
....................................
b?s= text8 b&s
....................................
....................................
....................................
b?s= text9 b&s
....................................
EOF
}

data |
sed 's/b&s/b\&s\n/g' |
sed -n 's/.*b?s= \(.*\) b&s.*/\1/p'

grep -oE '\?[^&]*&' | awk '{print $2}'

grep -Eo '\?[^&]*&' | awk '{$1=""; $NF=""; print}'

data |
sed 's/MAR&KER2/MAR\&KER2\n/g' |
sed -n 's/.*MAR?KER1= \(.*\) MAR&KER2.*/\1/p'

#!/bin/bash

function data()
{
cat <<EOF
b?s= text1 b&s ...... b?s= text2 b&s ...... b?s= text3 b&s ...... b?s= text4 b&s ...... b?s= text5 b&s ...... b?s= text6 b&s ......
....................................
b?s= text7 b&s
....................................
b?s= text8 b&s
....................................
....................................
....................................
b?s= text9 b&s
....................................
EOF
}

data |
sed 's/b&s/b\&s\n/g' |
sed -n 's/.*b?s= \(.*\) b&s.*/\1/p'