[BlueOnyx:01347] CHMOD & SUIDDIR

[Colin Jack]

I have a bit of a noob question that I hope someone can help with.

We have a VSite that is having problems running under PHP safe mode - even with Safe Mode GID turned off they are having problems uploading to a folder (error suggest GID/UID issues). Turning off Safe Mode solves the problem but as this is not recommended practice, we are looking for a way around it.

Apparently this helps with safe mode. From the 'man chmod' docs:

"4000    (the setuid bit).  Executable files with this bit set will run with effective uid set to the uid of the file owner. Directories with this bit set will force all files and sub-directories created in them to be owned by the directory owner and not by the uid of the creating process, if the underlying file system supports this feature: see chmod(2) and the suiddir option to mount(8)."

I am slightly out of my depth here. I have done a CHMOD 4000 filename okay but not sure how to achieve the MOUNT using SUIDDIR option for the sticky bit. Everything I try says "can't do that" ... 

[root at server7 web]# mount suiddir uploaded_photos
mount: special device suiddir does not exist

I obviously needed to do more with CHMOD to create the dir but even reading through the man file and on the web I am still a bit clueless.

... or is there an easier way to achieve this?

Any help and guidance very gratefully received.

Colin