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Re: wait till end of write, how?

on Fri, May 04, 2001 at 03:31:21PM +0200, Alexander Steinert (stony8@gmx.de) wrote:
> Given that a W2k client copies a large file into a samba share on a
> Linux server, how can a process (e.g. shell script) that will read this
> file wait until the file is totally transfered?
> The problem is that the file is (on the server) accessible for reading
> from the moment the client starts to copy.
> My first guess is to try something like `echo "" >> file' and hope that
> linux throws an error, because file is already opened for writing by the
> samba daemon. But maybe samba writes large files in blocks (i.e. opens
> and closes the file several times), who knows?

Transfer a validity check prior to the file transfer itself.  Size
and/or MD5 checksum.  When these match the file, you're done.

Some file formats (e.g.:  tar, gzip) are self-validating -- early
truncation raises an error.

Karsten M. Self <kmself@ix.netcom.com>    http://kmself.home.netcom.com/
 What part of "Gestalt" don't you understand?       There is no K5 cabal
  http://gestalt-system.sourceforge.net/         http://www.kuro5hin.org

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