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Old 11-24-2011, 10:48 PM   #1
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Registered: Sep 2011
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BASH (grep / sed / awk): find string within a (line) range

I have this kind of akward string search.

Lets say I have this text file called "test.cnf":
port mysql    = 1234
port ftp      = 1235

port mysql    = 1234
port ftp      = 1235
I want to find the line number of "port mysql = 1234" under [client] and not under [server]

What it means is, I have to search only beneath [client] but not beneath [server].
There are 2 tabs between "port mysql" and "= 1234"

Both [client] and [server] parts are in one text file.

Old 11-24-2011, 10:59 PM   #2
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sed -n '/\[server\]/,/^$/{ /port mysql/p }'  test.cnf
The /\[server\]/,/^$/ selects the [server] section. The commands inside { .. } are only executed inside this range. You could have more than one command or even select a subrange if need be.

The mysql config files use a blank line between sections, which allows you to easily end select the end of the range.

Last edited by jschiwal; 11-24-2011 at 11:01 PM.
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Old 11-24-2011, 11:16 PM   #3
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Thanks [edit: also for the VERY fast response!!!] it worked!!!!!!!!!!!!!!!!!!!!

Last edited by dragonetti; 11-24-2011 at 11:19 PM.


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