Read a file (log) until the word elapsed occur (also print the file)

read_file_until.sh

#!/bin/sh
EXPECTED_NO_LINES=1
i=0
echo "exp lines: ${EXPECTED_NO_LINES}"
echo "lines: ${ACTUAL_NO_LINES}"
while [ $i -eq 0 ]; do
	ACTUAL_NO_LINES=$(cat asdf3.log | wc -l)
    if ! [[ $ACTUAL_NO_LINES -eq $EXPECTED_NO_LINES ]]; then
		sed -n "${EXPECTED_NO_LINES},${ACTUAL_NO_LINES}p" asdf3.log
        EXPECTED_NO_LINES=$ACTUAL_NO_LINES
        $(grep -q elapsed asdf3.log) && i=1
		
    fi
done