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Full Discussion: BASH: File name part to list reference problem.
Top Forums Shell Programming and Scripting BASH: File name part to list reference problem. Post 302441623 by agama on Sunday 1st of August 2010 11:07:10 PM
Old 08-02-2010
Yes, it looks like some of your problem is your loop structure. The while loop is capturing the last record from your text file and comparing that against the file name component. I would guess that you want the filename, or some part of the filename, compared to the information in each line of the text file until you find a match.

It's not efficient, but the logic below might do what you need.

Code:

for f in $(ls *.jpg)
do
        suss off filename data from f

        while read buf
        do
                if filename data == desired field in buf
                then
                        echo what you need
                        break                   # exit while
                fi
        done <data_file
done

I couldn't tell from your code whether the filenames had the suffix tacked onto the end (picture.jpgxxxx) or picture.xxxx.jpg. The ls command implies the latter, but you seem to be stripping off xxxx as the trailing 4 characters. You might be getting tripped up with this too. If you post a sample of filenames and a sample of your text file, it'd make giving suggestions a bit easier.


Nitpicking now.... the statement

Code:
souse=$(echo $line)

can be written more simply:

Code:
souse="$line"

This is easier to read, and depending on the shell it more efficient. There might also be ways to make sussing the field data from the text file more efficient; using external processes like 'cut' introduce overhead that can eat your lunch as far as performance is concerned.
 

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LEARN ABOUT DEBIAN

mapivi

MAPIVI(1)						User Contributed Perl Documentation						 MAPIVI(1)

NAME

       MaPiVi - Picture Viewer and Organizer
		MaPiVi means Martin's Picture Viewer

DESCRIPTION

       JPEG picture viewer / image management system with meta info support written in Perl/Tk for UNIX, Mac OS X and Windows.

       I wrote mapivi just for me, because I needed a image viewer which is also able to display and edit meta infos of JPEG pictures, like EXIF,
       JPEG comments and IPTC/IIM infos.  As hobby photographer I am mostly interested in the EXIF infos (like timestamp, camera model, focal
       length, exposure time, aperture, etc.) and the possibility to add and edit IPTC infos and JPEG comments.  But I also want to rename
       pictures according to their internal date/time and to do lossless rotation, lossless cropping and other stuff.

       mapivi can be found here: http://mapivi.de.vu (link to the mapivi site) or if this won't work: http://herrmanns-stern.de (real site)
       http://sourceforge.net/projects/mapivi (download)

       I would be happy to receive some feedback (e.g. on which os mapivi works), bugfixes, patches or suggestions about mapivi.

       Copyright (c) 2002, 2003, 2004, 2005, 2006, 2007, 2008  Martin Herrmann All rights reserved.

       Feel free to redistribute.  Enjoy!

USAGE

       mapivi [-i ] [file|folder]

       to display a certain picture use:

       mapivi picture.jpg

       mapivi will generate and display all pictures in the folder as thumbnails. The given picture will be displayed in original size or zoomed
       to fit the window (picture frame).

       to view a folder containing pictures use:

       mapivi ~/pics/

       mapivi will generate and display all pictures in the given folder as thumbnails.

       to start mapivi with the import wizard

       mapivi -i

KEYS

       mapivi is controlled by the following keys: see also menu Help->Keys (the list is generated from the source code and is always actual.)

       Space, Page-Down
	   Show the next picture in folder

       BackSpace, Page-Up
	   Show the previous picture in folder

       Escape
	   Iconify MaPiVi (Boss-Key :)

       Cursor-up, -down, -left, -right
	   Scroll the picture, if it's bigger than the Canvas

       Shift-Cursor-up, -down, -left, -right
	   Move to the border of the picture, if it's bigger than the Canvas

       q   Quit MaPiVi

	   For all other key bindings, see the menu Help->Keys

MOUSE

       Try the right mouse button in the thumbnail picture list for a popup menu to copy, move, rename, rotate or delete pictures, to open a new
       folder, to add or remove comments or to exit MaPiVi.

       Use the buttons to add, edit or remove JPG comments, or to display all EXIF infos.

       If you hold the mouse over the buttons or labels a help message will pop up (or at least at most of them :).

perl v5.10.0							    2009-04-03								 MAPIVI(1)
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