SED: Append a line at the end of a range

Question

I'm looking to add some lines before the end of a range in a file.

sed '/BEGIN/,/END/ /$/i \ SOME TEXT TO ADD' /path/to/foo

• Original file: random text BEGIN foo bar END random text
• Expected behavior after SED: random text BEGIN foo bar SOME TEXT TO ADD END random text

Any ideas on how to accomplish this?

Answer 1

This might work for you (GNU sed):

sed '/BEGIN/,/END/!b;/END/iSOME TEXT TO ADD' file

If there are lines not between BEGIN and END print as normal otherwise if the line contains END insert some text.

Answer 2

Why don't you just look for the end tag, and insert before:

sed '/END/ iSOME TEXT TO ADD' /path/to/foo

Otherwise you must use several lines:

sed '/BEGIN/,/END/ {
    /END/ iSOME TEXT TO ADD
    }' /path/to/foo