does rsync lock exclusively files to copy?

[Haralabos Athanassiou]

I'm running rsync 2.5.6 on windows (via cygwin) and I've had other processes try to open the same files as rsync, but could not get through sometimes. Does rsync place a shared lock or an exclusive lock on the files it will copy from?

I checked into the sources but did not find any use of flock() which could specify either LOCK_SH or LOCK_EX, so I'm not sure what the open() does when used with O_RDONLY.

Any similar experiences?

Haralabos N. Athanassiou
BioInformatics Manager
Automated Cell Inc
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