Thomas Blank wrote:
> I'm missing a HiddenStore option in OpenSSH, known from some ftp-server
> implementations like ProFTPd.
>
> Consider the following scenario:
> - A process PROCA is frequently polling the directory for a file called
> myfile.txt
> - Someone transfers this file via sftp or scp to the directory
> - While transfer is going on and the file is not completely written,
> PROCA reads in the file and removes is
> -> Corrupt data is seen by PROCA
>
> Knowing this problem you have to solutions:
> 1. PROCA must check if myfile.txt is changing (filesize, mtime...) and
> wait until it does not change any more
> 2. sftp and scp use a HiddenStore by writing the file with a unique
> filename (eg. .myfile.txt) and renaming it at the end of the transfer
> (mv .myfile.txt myfile.txt)
>
> What do you think about this?
Why not have PROCA use inotify?
See /usr/src/linux/Documentation/filesystems/inotify.txt
hth,
Jason.
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