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Top Forums Shell Programming and Scripting Print #of lines after search string in a big file Post 302446673 by prash184u on Thursday 19th of August 2010 10:10:59 AM
Old 08-19-2010
C'mon Gurus...

All I want is to look for the pattern in the file...If I found it at 5 places... all I want to do is print lines after those pattern(line) until I fond a blank line.

Code:
Log EXAMPLE :


MT:Exception caught 
The following Numbers were affected:
1234
2345
2346

Error
java.lang.InternalError: Can't connect to X11 
      Exception caught 

The following numbers were affected:
11111
22222
33333
44444
55555

java.lang.InternalError: Can't connect to

This is the command I used

Code:
nawk 'c-->0;$0~s{if(b)for(c=b+1;c>1;c--)print r[(NR-c+1)%b];print;c=a}b{r[NR%b]=$0}' b=0 a=10 s="The following numbers were affected:" Process.log


Above command gives me 10 lines after the serach string.

But I just want the 3 and 5 lines in this case. I want to break the print if it hits the blank line.
 

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GREP(1) 						      General Commands Manual							   GREP(1)

NAME
grep - search a file for lines containing a given pattern SYNOPSIS
grep [-elnsv] pattern [file] ... OPTIONS
-e -e pattern is the same as pattern -c Print a count of lines matched -i Ignore case -l Print file names, no lines -n Print line numbers -s Status only, no printed output -v Select lines that do not match EXAMPLES
grep mouse file # Find lines in file containing mouse grep [0-9] file # Print lines containing a digit DESCRIPTION
Grep searches one or more files (by default, stdin) and selects out all the lines that match the pattern. All the regular expressions accepted by ed and mined are allowed. In addition, + can be used instead of * to mean 1 or more occurrences, ? can be used to mean 0 or 1 occurrences, and | can be used between two regular expressions to mean either one of them. Parentheses can be used for grouping. If a match is found, exit status 0 is returned. If no match is found, exit status 1 is returned. If an error is detected, exit status 2 is returned. SEE ALSO
cgrep(1), fgrep(1), sed(1), awk(9). GREP(1)
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