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Top Forums Shell Programming and Scripting Sort the file contents in each group....print the group title as well Post 302447898 by Corona688 on Tuesday 24th of August 2010 03:57:02 PM
Old 08-24-2010
Before you can sort it, you must first break them into separate groups.

---------- Post updated at 01:57 PM ---------- Previous update was at 01:46 PM ----------

This is a bit of a kludge since the sort command doesn't seem to be able to sort based on anything but fixed column positions, and your first column is variable size. If we swap the data around, it can always sort based on the first four columns.

Code:
#!/bin/sh

while read LINE
do
        # First line of a group
        if [ "${LINE:0:6}" == "Reason" ]
        then
                # Print the header
                echo "${LINE}"
                # Keep looping until we hit a blank line.
                while IFS="-" read A B && [ ! -z "${A}" ]
                do
                        # Reverse the order of the items so they can be sorted
                        echo "${B}-${A}"
                done | sort -u --key=1,4 |
                # Reverse the order back
                while IFS="-" read B A
                do
                        echo "${A}-${B}"
                done

                # Add a blank line to the end.
                echo
        fi
done < data

This User Gave Thanks to Corona688 For This Post:
 

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SORT(1) 							   User Commands							   SORT(1)

NAME
sort - sort lines of text files SYNOPSIS
sort [OPTION]... [FILE]... DESCRIPTION
Write sorted concatenation of all FILE(s) to standard output. Mandatory arguments to long options are mandatory for short options too. Ordering options: -b, --ignore-leading-blanks ignore leading blanks -d, --dictionary-order consider only blanks and alphanumeric characters -f, --ignore-case fold lower case to upper case characters -g, --general-numeric-sort compare according to general numerical value -i, --ignore-nonprinting consider only printable characters -M, --month-sort compare (unknown) < `JAN' < ... < `DEC' -n, --numeric-sort compare according to string numerical value -r, --reverse reverse the result of comparisons Other options: -c, --check check whether input is sorted; do not sort -k, --key=POS1[,POS2] start a key at POS1, end it at POS2 (origin 1) -m, --merge merge already sorted files; do not sort -o, --output=FILE write result to FILE instead of standard output -s, --stable stabilize sort by disabling last-resort comparison -S, --buffer-size=SIZE use SIZE for main memory buffer -t, --field-separator=SEP use SEP instead of non-blank to blank transition -T, --temporary-directory=DIR use DIR for temporaries, not $TMPDIR or /tmp; multiple options specify multiple directories -u, --unique with -c, check for strict ordering; without -c, output only the first of an equal run -z, --zero-terminated end lines with 0 byte, not newline --help display this help and exit --version output version information and exit POS is F[.C][OPTS], where F is the field number and C the character position in the field. OPTS is one or more single-letter ordering options, which override global ordering options for that key. If no key is given, use the entire line as the key. SIZE may be followed by the following multiplicative suffixes: % 1% of memory, b 1, K 1024 (default), and so on for M, G, T, P, E, Z, Y. With no FILE, or when FILE is -, read standard input. *** WARNING *** The locale specified by the environment affects sort order. Set LC_ALL=C to get the traditional sort order that uses native byte values. AUTHOR
Written by Mike Haertel and Paul Eggert. REPORTING BUGS
Report bugs to <bug-coreutils@gnu.org>. COPYRIGHT
Copyright (C) 2005 Free Software Foundation, Inc. This is free software. You may redistribute copies of it under the terms of the GNU General Public License <http://www.gnu.org/licenses/gpl.html>. There is NO WARRANTY, to the extent permitted by law. SEE ALSO
The full documentation for sort is maintained as a Texinfo manual. If the info and sort programs are properly installed at your site, the command info sort should give you access to the complete manual. sort 5.93 November 2005 SORT(1)
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