I am not a C programmer, so I was hoping someone can help with the following: vsftpd is programmed in C, but it has a fatal flaw whereby uploads can be copied by Samba before the upload is complete (this includes the latest vsftpd daemon) This is because vsftpd does not support file locking, unlike the AIX ftp server for example. Proftpd also has a way around this problem by hiding files with the hidden stor feature, which gives the file a randon hidden file name until the upload is complete. So, would it be possible to insert one of these features or both within vsftpd, by analyzing the source code and making the necessary changes?
I have contacted the developer but no feedback yet