Help needed in a shell script

ranga2727 · #1 (**permalink**) 09-11-07, 01:47

Hi,

I am try to remove certain lines from a file

here is what i need :

File1 .txt

aaa
bbb
bbb

wewe
wreq
1234
11111
1111
13324
2332434
1343434

i am searching for a string 1234 once that string is found i need to remove 1234 and the lines which are above (2 lines and 5 lines down ) these are constant for my work

So the output file should be only like this ::
=====================================
aaa
bbb
bbb

radoulov · #2 (**permalink**) 09-11-07, 05:39

If you have GNU grep:

Code:

grep -v "$(grep -B2 -A5 1234 yourfile)" yourfile

ranga2727 · #3 (**permalink**) 09-11-07, 09:21

i donot have a gnu grep any other option ??

Thanks

radoulov · #4 (**permalink**) 09-11-07, 10:19

If your file is not big:

Code:

awk '{x[NR]=$0}
	/1234/{y[NR]}END{
		for(j in y)
			for(i=j-2;i<j+6;i++)
				delete x[i]
		for(i=1;i<=NR;i++)
			if(i in x)
	print x[i]
}' file

If your awk doesn't support the delete statement:

Code:

awk '{x[NR]=$0}
	/1234/{y[NR]}END{
		for(j in y)
			for(i=j-2;i<j+6;i++)
				x[i]="not_this_one"
		for(i=1;i<=NR;i++)
			if(x[i]!="not_this_one")
	print x[i]
}' file

ranga2727 · #5 (**permalink**) 09-15-07, 12:28

Thanks It worked .. Thanks a lot !!!!

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