[lug] how to handle open files - upload server

[Bear Giles]

Backups have a similar problem and the way I handle it is to get a 
nonexclusive lock on all files being saved.  This doesn't always 
work, but if sftp doesn't get an exclusive lock (either directly 
or indirectly via fopen()) it's an easy patch.

Once you know that sftp locks files being uploaded, you can write 
a quick C program to produce a list of all lockable files in the 
subdirectory.

Bear