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I am trying to get for each file in a directory, a row with at least, the following fields (the order doesn't matter, although that one is the preferable):

 - Image resolution, in case it is an image. If not, just blank.
 - Modification date
 - Human readable file size
 - Filename

The files in the directory are jpg images and the rest just plain text files. I've tried with something like:

find . -type f -exec paste `identify {} 2> /dev/null` `ls -goh {}` \;

ls tells to me that cannot access {}. The 2> /dev/null part inside identify is for skipping error messages for non-jpg files.

I've also tried with different combinations of xargs and $() and so on, but haven't found a way yet.

Any suggestion?

  • Are you just interested in the current directory's files? Or are you using find because you want the recursive search? – Jeff Schaller Sep 21 '18 at 19:05
  • I'm actually not interested in a recursive search (because there is no subdirs) – Peregring-lk Sep 22 '18 at 0:01
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This looks like a good use for an embedded -exec script:

find . -name \*.png -exec sh -c 'printf '%s,%s\\\\n' "$(identify -format '%hx%w' "$1")" "$(stat -c %y,%s,%n "$1")";' bash {} \; > out.csv

Sample output is:

32x32,2018-09-21 15:04:33.216773000 -0400,192,./favicon.png
20x20,2018-09-21 15:04:33.225771000 -0400,1202,./delete.png

Broken up for readability, that script is:

find . -name \*.png -exec sh -c 
  'printf '%s,%s\\\\n' 
     "$(identify -format '%hx%w' "$1")" 
     "$(stat -c %y,%s,%n "$1")";' 
  bash {} \; > out.csv

Note the extra quoting to get a single \n into printf.

Outside of find, to get such output for files in the current directory:

for f in ./*.png
do
  printf '%s,%s\n' "$(identify -format '%hx%w' "$f")" "$(stat -c %y,%s,%n "$f")"
done

Sample output is:

20x20,2018-09-21 15:04:33.225771000 -0400,1202,./delete.png
32x32,2018-09-21 15:04:33.216773000 -0400,192,./favicon.png

You can change the pieces out or add other pieces as needed; for 3rd command, just add another %s and quoted command.

I've generated a simplistic CSV-type output, but if your filenames might contain commas, you should quote the filename. Ditto if you convert the file sizes from a simple byte string to one with commas in the thousands places.

  • You could do without printf here since both identify and stat can output à la printf so e.g. sh -c 'identify -format %hx%w, "$1"; stat -c %y,%s,%n "$1"' will do. – don_crissti Sep 21 '18 at 19:39
  • I wanted to do that, @don, but my identify adds a newline to the output – Jeff Schaller Sep 21 '18 at 19:41
  • ImageMagick 6.7.8-9 – Jeff Schaller Sep 21 '18 at 19:46
  • That's really odd... There's an old bug report but they say there it's fixed in 6.2.2 and later... Might as well report this upstream as this clearly should not happen... – don_crissti Sep 21 '18 at 19:49
  • Seem to only add the newline at the end; when given multiple files, it adds it only the one at the end – Jeff Schaller Sep 21 '18 at 19:53
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The text in your substitutions is evaluated once before find even start. Note that the preferred way is now $( ). You can pass the commands quoted to a shell, but the easiest way is to just create a script and call the script from find.

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