Linux – Disabling “symlink follow” feature on Ext3/4 mount points

ext3linuxmountsymbolic-link

How can I disable the symlink feature of ext3 file system mount point ?
My server is being attacked by some sort of symbolic link hacking methods for reading other user's home directory.
There is such an option "nosymfollow" on BSD series, but I didn't find the equivalent for Linux.

Best Answer

There's no such option for ext3 or ext4, to the best of my knowledge. Maybe if you described the actual nature of your problem someone could propose a different solution.

Related Solutions

Linux symbolic links over a network

Have a look at the Network File System.

Linux – How to symlink folders and exclude certain files

I assume you really mean "symlink everything inside the folder"...

Conceptually, you want something like:

for each file in base folder not in exclude list
    create symlink in target folder pointing back to base folder
done

bash logic to achieve this goes something like

#! /bin/bash

exclude=( "foo.conf" "bar.conf" )

for file in *; do
    for (( index = 0; index < ${#exclude[@]}; index++ )); do
        if [[ ${file} != ${exclude[${index}]} ]]; then
            ln -s ${file} ${target}/${file}
        fi  
    done
done

Assuming you don't know already, the Advanced Bash-Scripting Guide should give you enough to work out what globbing you want (perhaps find) and how to convert that to a function (perhaps a recursive one).

Best Answer

Related Solutions

Linux symbolic links over a network

Linux – How to symlink folders and exclude certain files

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