Rsync and open files

[Jim Salter]

Rsync does not handle open files.  Your operating system does.  Either 
the OS allows rsync access, or it doesn't.  Quick crib sheet:

Normal behavior for *BSD or Linux systems: the root user has access to 
any file, at any time.  Non-root users may or may not, depending on 
system configuration, but in my experience read-only use of open files 
is nearly always permissible on these systems, in the absence of special 
preparation otherwise (custom FLOCK, etc).

Win32 systems: These systems DO NOT allow access to open files, even for 
reading.  Even if you are asking under Administrator or LOCALSYSTEM 
credentials.  There is a workaround, but it costs a lot of money 
(approximately $850 last time I checked): the St. Bernard Open File 
Manager.  The aforementioned app will allow you access to files which 
are currently under a no-read lock; without it, rsync just throws an 
error, skips the file, and moves on to the next one in queue.

HTH.

Jim Salter
JRS Systems

>I didn't see this answered in the FAQ, and it's important to one of my
>application owners.
>
>How does RSYNC handle open or write in process files?
>
>Thank you!
>
>J
>
>jadams at molex.com
>john.adams at molex.com
>
>
>
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