Match pattern only between certain lines in entire file
Hello, I have input that looks like this:
I would like to use either awk, sed, or grep to match a regex, but print not only line that contains the match, but also those lines before and after that match until a line that begins with a certain character.
So, for example, in the input above, if I would like to match the pattern "BVX" in field 2, I would desire the output to include not only that line, but also those between the nearest two lines before and after beginning with "*".
Thus the desired output would be:
This is a very long file where a given pattern (such as "BVX" in the example) can occur multiple times. I would like to print each match of "BVX" and the lines before it stopping at /^\*/ and after the match stopping at /^\*/.
I have attempted combinations of grep and sed, but to no avail, e.g.
Thank you so much in advance.
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I need help with this-
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L B white
X Y white
A B brown
M Y black
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Input File a.txt:
=================
1
2
3
abcd
4
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foo line1
misc
whatever
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misc
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