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Home > Forums > Programmers > Languages > UNIX Scripting Forum

grep lines between spaces in a file.

thread822-1679290
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SDCSA (Programmer)
30 Mar 12 10:07
Hi,

I would like to take a file, grep blocks of lines between spaces and spool them to a different file . Suppose that the file name is a.txt, I'd like to create a1.txt, a2.txt depending on the number of text blocks between spaces. Will appreciate if anyone can suggest me how to do this.

aaaaaaa
aaaaaaa

bbbbbb
bbbbbb

Thanks.
PHV (MIS)
30 Mar 12 10:11
What have you tried so far and where in your code are you stuck ?
Tip: man awk

Hope This Helps, PH.
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feherke (Programmer)
30 Mar 12 10:17
Hi

Do you have csplit ?

CODE

csplit -f 'a' -b '%d.txt' a.txt '/^$/+1' '{*}'

Feherke.
http://feherke.github.com/

PHV (MIS)
30 Mar 12 10:36
feherke, which *nix has a csplit admitting the -b option ?
Well, GNU csplit admits it, I guess.
feherke (Programmer)
30 Mar 12 10:47
Hi

Oops, indeed, the SUS not specifies -b. So it is GNU extension.
Missed that. Thanks.

Feherke.
http://feherke.github.com/

PHV (MIS)
30 Mar 12 11:01
So, here a legacy portable approach:

CODE

awk 'BEGIN{a=1}NF{print >("a"a".txt");next}{close("a"a++".txt")}' a.txt

Hope This Helps, PH.
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