Auto copy for files from folder to folder upon instant writing


 
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# 1  
Old 04-15-2008
Auto copy for files from folder to folder upon instant writing

Hello all,
I'm trying to accomplish that if a file gets written to folder /path/to/a/ it gets automatically copied into /path/to/b/ the moment its get written.

I thought of writing a shell script and cron it that every X amount of minutes it copies these files over but this will not help me scenario because the written files to /path/to/a/ gets deleted on random timing sometimes the file get written and deleted in less than 5 seconds sometimes its over a minute or hours.

is there a technique in unix that i'm unaware of that does this?

Platform is mostly Linux flavors such as redhat/centos/debian or FreeBSD

Thank you.
Bashar
# 2  
Old 04-15-2008
Bad approach imho. Please tell us why you aren't using network filesystem or san concepts.
Otherwise man inotify for 2.6 kernels and man fcntl for 2.4 kernels searching for F_NOTIFY.
# 3  
Old 08-21-2008
I'm trying to do something similar and have been reading posts and experimenting all day. On my team, we sometimes modify a file with vi but forget to stop and make a backup copy of the original first. You can imagine that "rollback" is almost impossible with this little "problem."

I'd like to do an automatic copy, date/time stamp automatically appended to the file name, and alias vi to call this automatic copy script as follows:

vi <file>
file is automatically copied to <file>.00814201440
make your changes
quit vi

If you worked out this problem or (anyone) came up with an answer or can, please let me know, thanks!
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