Classifying or Tagging Read-Only files

[Archive]

[Originally posted by photowarrior on 2009-12-12 17:28:33-08]

Hello,

I was wondering if someone could help me.  I do a lot of field photography and i often tag photos with the "lock" button on my Nikon D300 camera to pre-process and sort images.  It is these images that i focus on first when processing everything.

I am looking for a technique that would allow me to add a tag to the image if it has a read-only file attribute on it.  Currently, I use windows to sort by file attributes, drag all of the first files into a folder, do my exiftool processing (adding copyright tags, renaming and moving to photo archives) and then focus on the rest.  

I'm looking for a batch file or Exiftool flag that would allow me to do this without the manual sorting first.

Any Suggestions?

J.

[Archive]

[Originally posted by exiftool on 2009-12-12 21:24:18-08]

So when you lock the file with the D300, the only
difference is that the image is read-only after
it is downloaded to your computer?  If the file
itself is modified I could extract
the meta information if I had sample images.
Otherwise please give me as much detail as you can
about how the filesystem permissions are changed
and I will see what I can do about extracting these
permissions.  If I can do this, then you can test
the value in a -if statement to conditionally
process your files.

 - Phil

[Archive]

[Originally posted by photowarrior on 2009-12-13 01:37:13-08]

Hi Phil,

That is correct on the file being "Read-Only".  This is only difference (that i have been able to find) between it and a non-tagged/locked file. I have not been able to find any difference in the contents of the file besides the obvious tags that would normally be different.  I can provide you a couple of images for examination if you would like to see if there are internal tags

I mostly use the windows version of Exiftool which is the "read only" file attribute.  Under Linux, however, the file permissions are 555 for a locked file.

Hope that helps.

J

[Archive]

[Originally posted by exiftool on 2009-12-13 12:44:43-08]

OK.  I will add a new "FilePermissions" tag to exiftool
8.02 which will allow you to test the permissions with
the -if option.  It will work like this:

Code:

> ls -l a.jpg
-rw-r--r--  1 phil  staff  351 13 Dec 08:28 a.jpg

> exiftool a.jpg -filepermissions
File Permissions                : Owner:rw- Group:r-- Other:r--

> exiftool a.jpg -filepermissions#
File Permissions                : rw-r--r--

> exiftool a.jpg -p '$filename is writable' -if '$filepermissions=~/Owner:.w/'
a.jpg is writable

> chmod 444 a.jpg

> ls -l a.jpg
-r--r--r--  1 phil  staff  351 13 Dec 08:28 a.jpg

> exiftool a.jpg -filepermissions
File Permissions                : Owner:r-- Group:r-- Other:r--

> exiftool a.jpg -p '$filename is writable' -if '$filepermissions=~/Owner:.w/'
    1 files failed condition

I have tested this and it should work in Windows too
(with double quotes around arguments
instead of single quotes as above).

I hope to release version 8.02 tomorrow.

- Phil

[Archive]

[Originally posted by photowarrior on 2009-12-13 14:03:39-08]

Many thanks..

That looks like it would work perfectly..  So to confirm my use of this, i assume my command would be something like this in order to add a Keyword of "FieldTagged" to the image:

Code:

exiftool a.jpg -if "$filepermissions=~/Owner:.w/" -keywords=+"FieldTagged"

My compliments on a great piece of software for handling many photographs easily and quickly.

J.

[Archive]

[Originally posted by exiftool on 2009-12-14 00:59:09-08]

Yes.  That should work.

- Phil

[Archive]

[Originally posted by exiftool on 2009-12-14 23:50:45-08]

I wasn't able to release version 8.02 today, but if I
don't hit any snags I should be able to do this
tomorrow morning.

I think I will use a slightly different format for the
converted values.  I was thinking of the following:

Code:

> exiftool -filepermissions -filepermissions# test.jpg
File Permissions                : Owner:rw- Group:rw- Other:r--
File Permissions                : rw-rw-r--

But now I'm thinking of doing this instead:

Code:

> exiftool -filepermissions -filepermissions# test.jpg
File Permissions                : rw-rw-r--
File Permissions                : 664

so the -if expression would change to:

Code:

-if "$filepermissions=~/^.w/"

Unless someone convinces me otherwise I think this is
the way I'll implement it.

- Phil