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Old 09-16-2008, 04:21 AM   #1
Hisu
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Registered: Sep 2008
Posts: 4

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[sed || gawk]: find and delete blocks and lines from file


I have a file named foo.bar
It consists of something like this:

[foo1]
barbarbar=bbaar
barbar=bbarr
bar=baarr
[foo2]
barbar=bbaarrbbaarr

I need to locate and remove either anything from [foo1] to [foo2], OR barbar= ONLY in block [foo2]. How do i do this by sed or awk?
 
Old 09-16-2008, 02:01 PM   #2
jan61
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Registered: Jun 2008
Posts: 235

Rep: Reputation: 46
Moin,

Code:
jan@jack:~/tmp/barbar> cat data
[foo1]
barbarbar=bbaar
barbar=bbarr
bar=baarr
[foo2]
barbar=bbaarrbbaarr
bar=baarr
[foo3]
barbar=bbaarrbbaarr

jan@jack:~/tmp/barbar> sed '/^\[foo2\]/,/^\[foo[^2]\]/{/^barbar=/d};/^\[foo1]/,/^\[foo2\]/{/^\[foo2\]/p;d}' data
[foo2]
bar=baarr
[foo3]
barbar=bbaarrbbaarr

jan@jack:~/tmp/barbar> awk ' /^\[foo1\]/ { del = 1; }
>       /^\[foo2\]/ { del = 2; }
>       /^\[foo[^12]\]/ { del = 0; }
>       /^barbar=/  { if (del > 0) getline; }
>       { if (del != 1) print; } ' data
[foo2]
bar=baarr
[foo3]
barbar=bbaarrbbaarr
Jan
 
  


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