does rsync lock exclusively files to copy?

jw schultz jw at
Thu Jul 24 11:17:44 EST 2003

On Wed, Jul 23, 2003 at 09:12:21PM -0400, Haralabos Athanassiou wrote:
[reformatted because sender mailer is broken]
> 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.

That's an artifact of windows.  All open operations are
exclusive.  This is the bane of backups on whendoze.

	J.W. Schultz            Pegasystems Technologies
	email address:		jw at

		Remember Cernan and Schmitt

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