gawk

I'm dealing with a specific filenames, and need to extract information from them. The structure of the filename is similar to: "20100613_M4_28007834.005_F_RANDOMSTR.raw.gz" with RANDOMSTR a string of max 22 chars, and which may contain a substring (or not) with the format "-W[0-9].[0-9]{2}.[0-9]{3}". This substring also has the unique feature of starting with "-W". The information I need to extract is the substring of RANDOMSTR without this optional substring. I want to implement this in a bash script, and so far the best option I found is to use gawk with a regular expression. My best attempt

I have a inputfile with template as shown below. I want to change the Version: using sed. Package: somename Priority: extra Section: checkinstall Maintainer: joe@example.com Architecture: i386 Version: 3.1.0.2-1 Depends: Provides: somename Description: some description Currently I am getting the current version using grep -m 1 Version inputfile | sed 's/[:_#a-zA-Z\s"]*//g' and I am trying to replace the current version with sed 's/3.1.0.2-1/3.1.0.2/' inputfile However this does not seem to work, but when I try it in command line using echo it works. echo 'Version: 3.0.9.1' | sed 's/3.0.9.1/3.2

This question already has an answer here: AWK: Access captured group from line pattern 6 answers I often find myself doing the same match in the action as the pattern, to access some part of the input record, e.g. /^Compiled from \"(.*)\"$/ { file_name = gensub("^Compiled from \"(.*)\"$", "\\1", "g"); print file_name; } So the regexp matching is done twice. Is there any way I can access \\1 in the action without matching again? I am trying to both reduce on pattert matching and extra code. Unfortunately, GAWK, doesn't have the carry-forward feature of sed which uses an empty // . sed '/\(patt\

I know I can redirect awk's print output to another file from within a script, like this: awk '{print $0 >> "anotherfile" }' 2procfile (I know that's dummy example, but it's just an example...) But what I need is to redirect output to another file, which has a dynamic name like this awk -v MYVAR"somedinamicdata" '{print $0 >> "MYWAR-SomeStaticText" }' 2procfile And the outpus should be redirected to somedinamicdata-SomeStaticText . I know I can do it via: awk '{print $0 }' 2procfile >> "$MYVAR-somedinamicdata" But the problem is that it's a bigger awk script, and I have to output to several