I am using curl as shown here: curl -s -L -R -z "file-name" -O "URL"

What I would like to know is if there is a way to have curl issue an
exit code depending on whether or not it actually downloaded a newer
file. Apparently, curl always exits on "0" unless an error occurs which
means I have to check to see if a newer file was fetched.

The command is being run via a shell script from CRON. Right now I am
comparing the files to see if a newer one was downloaded. It would be
easier if curl simply issued an exit code to indicate that it did or
didn't fetch a newer file.

If this is not currently available in curl, it might be a nice feature
to add to it at some time.

Thanks!

-- 
Gerard

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