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Full Discussion: Sorting file content by file extensions
Homework and Emergencies Emergency UNIX and Linux Support Sorting file content by file extensions Post 302639359 by drl on Friday 11th of May 2012 02:38:30 PM
Old 05-11-2012
Hi.

Here are two other methods. The first uses msort, which allows fields to be specified from the right-hand side. The other uses a quickly written perl code, which reverses the characters on each line:
Code:
#!/usr/bin/env bash

# @(#) s1	Demonstrate collect by extension, msort, perl, sort
# msort home: http://freshmeat.net/projects/msort

pe() { for _i;do printf "%s" "$_i";done; printf "\n"; }
pl() { pe;pe "-----" ;pe "$*"; }
db() { ( printf " db, ";for _i;do printf "%s" "$_i";done;printf "\n" ) >&2 ; }
db() { : ; }
re() { perl -wn -e 'print scalar reverse;' $1; pe ; }
C=$HOME/bin/context && [ -f $C ] && $C msort perl sort

FILE=${1-data1}
pl " Input file $FILE:"
head $FILE

pl " Results with msort:"
msort -q --line -d"." --position=-1,-1 --position=1,1 $FILE

pl " Results with (perl) reverse, sort, reverse:"
re $FILE |
sort -t"." |
re |
tee f1

exit 0

producing:
Code:
% ./s1

Environment: LC_ALL = C, LANG = C
(Versions displayed with local utility "version")
OS, ker|rel, machine: Linux, 2.6.26-2-amd64, x86_64
Distribution        : Debian GNU/Linux 5.0.8 (lenny) 
bash GNU bash 3.2.39
msort 8.44
perl 5.10.0
sort (GNU coreutils) 6.10

-----
 Input file data1:
a.xml
a.doc
a.txt
a.jpg
b.xml
b.doc
b.txt
b.jpg
c.xml
c.doc

-----
 Results with msort:
a.doc
b.doc
c.doc
a.jpg
b.jpg
c.jpg
a.txt
b.txt
c.txt
a.xml
b.xml
c.xml

-----
 Results with (perl) reverse, sort, reverse:


a.doc
b.doc
c.doc
a.jpg
b.jpg
c.jpg
a.xml
b.xml
c.xml
a.txt
b.txt
c.txt

The perl function is not completely satisfactory, but perhaps someone will stop by with a suggestion to omit the extra newlines.

I haven't tried to install msort on Solaris, but there is a link on MSORT for it.

Best wishes ... cheers, drl
Last edited by drl; 05-11-2012 at 03:44 PM..
 

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LEARN ABOUT DEBIAN

mcpmv

MRENAME(1)						      General Commands Manual							MRENAME(1)

NAME

       mrename - program to rename files

SYNOPSIS

       mrename 'pattern' prefix [option]

DESCRIPTION

       This  manual  page  documents  briefly the mrename command.  This manual page was written for the Debian GNU/Linux distribution because the
       original program does not have a manual page.

       mrename is a tool for easy and automatic renaming of many files.  The 'pattern' is the pattern to search files to rename (quoted  to  avoid
       that  bash  resolve  it),  and prefix is the prefix that will be added to the name of each file. The two alternative options for copying or
       moving files in the new name are explained below.  All parameters are needed, and you have to stay and launch the script in the same direc-
       tory of the files to be renamed. The program should be able to write in this directory.

OPTIONS

       There are only the following three options.

       -c     The option -c will copy each file with the new filename.

       -m     The option -m will move each file in the new filename.

       -h     Display help.

EXAMPLE

       If  you	have  a  directory  with two jpeg images prof.jpg and forp.jpg and you want to add them a prefix like item0, item1 etc..  (that is
       item0prof.jpg, item1forp.jpg etc..) do this:

	  cd /path/to/the/images
	  mrename '*.jpg' item -c

       to copy each matching file into another with the new name

	  mrename '*.jpg' item -m

       to rename each file without keeping a copy with the previous name

Word-Wide-Web:
       http://alfalinux.sourceforge.net/mrename.php3

AUTHOR
:
       Giancarlo -rofus- Erra
       e-mail: rofus@mindless.com

       This manual page was written by Dr. Guenter Bechly <gbechly@debian.org>, for the Debian GNU/Linux system (but may be used by others). It is
       distributed under the GPL just like mrename itself.

								 October  22, 2000							MRENAME(1)
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