Re: [PLUG] check for a file being transmitted via ftp

["Eric at Lucii.org" <eric@lucii.org>]

This is a novel (and excellent!) idea.  I'll have to look into it.
Since the MD5 sum could conceivably be sent after the main file it
would also act as a trigger file.

Thanks,
Eric

On 03/25/2014 02:34 PM, Tom McCurdy, Jr. wrote:
> You could use MD5SUM to help verify the integrity of the file you're downloading.
> 
> 
> For example, if the file you are pulling from the FTP server is foo.txt, the creator would generate an MD5SUM hash value on that file and place the resulting hash value into a text file named, foo.md5.  You can then setup your script to download both files, run an MD5SUM on the foo.txt and compare the resulting hash value to the value in foo.md5.
> 
> For more information, have a look at the MD5SUM Wikipedia page:
> 
> http://en.wikipedia.org/wiki/Md5sum
> 
> -Tom
> 
> 
> 
> On Tue, Mar 25, 2014 at 2:05 PM, Eric at Lucii.org <eric@lucii.org <mailto:eric@lucii.org>> wrote:
> 
>     I expect a file to be routinely transmitted to me via ftp.  A bash script,
>     invoked as a cron job, will process and then archive that ftp file.
> 
>     All of that is easy/routine.
> 
>     My question is: how do I know that the file is complete?  I don't want to
>     start processing the file without being sure that the ftp process is done.
> 
>     I thought about checking the size of the file in bytes and then comparing that
>     to it's size 1 minute earlier... if it's not growing then it's probably done.
>     But, that's just *probably* as ftp could be stalled temporarily or worse.
> 
>     I have also considered about using inotify cron (incron) but I expect that it
>     would be triggered at the file's creation - not when it's time for me to
>     process it.
> 
>     Thanks
>     Eric
>     --
>     #  Eric Lucas
>     #
>     #                "Oh, I have slipped the surly bond of earth
>     #                 And danced the skies on laughter-silvered wings...
>     #                                        -- John Gillespie Magee Jr
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> 
> 
> 
> ___________________________________________________________________________
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-- 
#  Eric Lucas
#
#                "Oh, I have slipped the surly bond of earth
#                 And danced the skies on laughter-silvered wings...
#                                        -- John Gillespie Magee Jr
___________________________________________________________________________
Philadelphia Linux Users Group         --        http://www.phillylinux.org
Announcements - http://lists.phillylinux.org/mailman/listinfo/plug-announce
General Discussion  --   http://lists.phillylinux.org/mailman/listinfo/plug