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Full Discussion: Extract fragments from file
Top Forums Shell Programming and Scripting Extract fragments from file Post 302894807 by black_fender on Thursday 27th of March 2014 11:08:45 AM
Old 03-27-2014
Well.. it's not really relevant from my point of view. I tried a combination of grep -n (to obtain line number) and cascade of head | tail commands .. which delivers the result, but I need it all to be done in awk.

Now.. from awk all I tried was
Code:
 awk "/<measInfo>/,/<\/measInfo>/"

And this gives me all the chunks from <measInfo> to </measInfo> from the target file. But I need to keep only the chucnk that contains the string I look for.. any idea how to keep each chunk in a variable and then to search each variable at a time for my string.. sort of a looping thing.
I know it can be done with awk.. but I don;t have the chops for it



 

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DPKG-AWK(1)						      General Commands Manual						       DPKG-AWK(1)

NAME
dpkg-awk - Utility to read a dpkg style db file SYNOPSIS
dpkg-awk [(-f|--file) filename] [(-d|--debug) ##] [(-s|--sort) list] [(-rs|--rec_sep) ??] '<fieldname>:<regex>' ... -- <out_fieldname> .. DESCRIPTION
dpkg-awk Parses a dpkg status file (or other similarly formatted file) and outputs the resulting records. It can use regex on the field values to limit the returned records, it can also be told which fields to output, and it can sort the matched fields. OPTIONS
-f filename --file filename The file to parse. The default is /var/lib/dpkg/status. -d [#] --debug [#] Each time this is specified, it increased the debug level. -s field(s) --sort field(s) A space or comma separated list of fields to sort on. -n field(s) --numeric field(s) A space or comma separated list of fields that should be interpreted as numeric in value. -rs ?? --rec_sep ?? Output this string at the end of each output paragraph. -h --help Display some help. fieldname The fields from the file, that are matched with the regex given. The fieldnames are case insensitive. out_fieldname The fields from the file, that are output for each record. If the first field listed begins with ^, then the list of fields that follows will NOT be output. BUGS
Be warned that the author has only a shallow understanding of the dpkg packaging system, so there are probably tons of bugs in this pro- gram. This program comes with no warranties. If running this program causes fire and brimstone to rain down upon the earth, you will be on your own. This program accesses the dpkg database directly in places, querying for data that cannot be gotten via dpkg. AUTHOR
Adam Heath <doogie@debian.org> DEBIAN
Debian Utilities DPKG-AWK(1)
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