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Top Forums Shell Programming and Scripting copy range of lines in a file based on keywords from another file Post 302592984 by kaaliakahn on Wednesday 25th of January 2012 11:01:22 AM
Old 01-25-2012
copy range of lines in a file based on keywords from another file

Hi Guys,

I have the following problem. I have original file (org.txt) that looks like this

module v_1(.....)
//arbitrary number of text lines
endmodule

module v_2(....)
//arbitrary number of text lines
endmodule

module v_3(...)
//arbitrary number of text lines
endmodule

module v_4(...)
//arbitrary number of text lines
endmodule

module v_5(...)
//arbitrary number of text lines
endmodule


I have another file keywords.txt that has keywords for original file org.txt that looks like

v_2
v_3
v_5

What i want to do is to extract modules from org.txt based on keywords.txt and store it in a new file (filter.txt). In this case, i shall be extracting only modules v_2, v_3 and v_5 and storing them in the filter.txt as

module v_2(....)
//arbitrary number of text lines
endmodule

module v_3(...)
//arbitrary number of text lines
endmodule

module v_5(...)
//arbitrary number of text lines
endmodule

How to do that using sed and awk or any other cool way. Note that this was a toy example. The actual files are huge in terms of number of lines.

Moderator's Comments:
Mod Comment Please use next time code tags for your code and data

Last edited by vbe; 01-25-2012 at 12:45 PM..
 

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fmt(1)							      General Commands Manual							    fmt(1)

NAME
fmt - format text SYNOPSIS
width] [file...] DESCRIPTION
The command is a simple text formatter that fills and joins lines to produce output lines of (up to) the number of characters specified in the width option. The default width is 72. concatenates the arguments. If none are given, formats text from the standard input. Blank lines are preserved in the output, as is the spacing between words. does not fill lines beginning with a period for compatibility with Nor does it fill lines starting with Indentation is preserved in the output and input lines with differing indentation are not joined (unless is used). can also be used as an in-line text filter for the command: reformats the text between the cursor location and the end of the paragraph. Options recognizes the following options: Crown margin mode. Preserve the indentation of the first two lines within a paragraph and align the left margin of each subsequent line with that of the second line. This is useful for tagged paragraphs. Split lines only. Do not join short lines to form longer ones. This prevents sample lines of code, and other such "formatted" text, from being unduly combined. Fill output lines to up to width columns. WARNINGS
The width option is acceptable for BSD compatibility, but it may go away in future releases. SEE ALSO
nroff(1), vi(1). fmt(1)
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