Symlinks & chroot - Is it Possible?

Drew Tomlinson drew at
Sun Apr 4 08:59:03 PDT 2004

On 4/3/2004 11:21 AM den wrote:

> I use mount_null and have no problem with it. You need create dir in 
> each user home and use mount_null for mount your chrooted dir
> with created directories as mount points .
> So you need add many lines in your /etc/fstab file .

I understand.  Thanks for your reply.

> I think that words in manual about beta concern writing in directory 
> that uses mount_null. I don't use write and it seems that you don't
> need write too. So use this fs type ( set in fstab "ro" option for 
> this mount point).
> And read man for mount_null.

This seems reasonable.  Can anyone else comment on their experience 
using mount_null read only?



> Drew Tomlinson wrote:
>> I have a few users that I wish to allow FTP access on my 
>> 4.9-RELEASE-p4 system.  I've setup their accounts and added them to 
>> /etc/ftpchroot to lock them into their login directories.  They are 
>> in the standard /home/user dirs.
>> However, I want all of them to have access to another directory 
>> (/ftp/share) that is setup read-only.  I tried adding a symlink to 
>> /ftp/share but I've found this doesn't work when the user is 
>> chrooted.  I've Googled on this issue.  A FAQ for  PureFTPd confirms 
>> this and suggests mount_null.  But the man page for mount_null says 
>> that the code is beta and may wipe out a file system.
>> What is the best way to achieve my objective?  If mount_null is it, 
>> how do I use it?  Do I include it in some sort of login script?  I've 
>> set these users shells to nologin.  How would that work?
>> Thanks,
>> Drew 

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