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Posted to user@commons.apache.org by info <in...@iond.it> on 2004/11/07 14:42:50 UTC

[VFS] How to resolve all local files relative to a chroot dir ?

Hi all,

is there anyone can give me some hints how to resolve all absolute
and relative paths versus a chroot (jail) directory with VFS ?

Of course only for the "file://" and "tmp://" schemes.

Ex. having as jail "file://myJail"

      "file://myDir/myFile.txt"  -->  "file://myJail/myDir/myFile.txt"

     "../../myDir/myFile.txt"  -->  "file://myJail/myDir/myFile.txt"

FileName.getRelativeName() doesn't make this job...

I can't realize it reading the api docs.
Maybe creating a FileSystem ?

Thanks in advance

Lucio

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Re: [VFS] How to resolve all local files relative to a chroot dir ?

Posted by Mario Ivankovits <im...@apache.org>.
info wrote:

>is there anyone can give me some hints how to resolve all absolute
>and relative paths versus a chroot (jail) directory with VFS ?
>  
>
Currently VFS do not provide a "chroot" functionallity.

The only thing you can do is setting a "baseFile" on the FileSystemManager.

        StandardFileSystemManager sm = new StandardFileSystemManager();
        sm.init();
        sm.setBaseFile(new File("/home/im"));
        FileObject fo = sm.resolveFile("projects");
        System.err.println(fo.getName().getURI());

Now the resolveFile resolves by taking the baseFile into account, but 
the user can break out of the jail.

-- 
Mario


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Re: [VFS] How to resolve all local files relative to a chroot dir ?

Posted by info <in...@iond.it>.
Alle 10:10, martedì 9 novembre 2004, Mario Ivankovits ha scritto:
> info wrote:
> 
> >is there anyone can give me some hints how to resolve all absolute
> >and relative paths versus a chroot (jail) directory with VFS ?
> >  
> >
> Looks like I was not quite true what I told you in my last post.
> 
> You can use the VirtualFileSystem to archive this behaviour:
> 
>         FileSystemManager sm = VFS.getManager();
>         FileObject fo = sm.resolveFile("file:/home/im/projects");
>         FileObject foVirt = sm.createVirtualFileSystem(fo);
> 
> If you try to resolve using a relative Path outside "fo" you get an 
> "FileSystemException: Invalid relative file name."
> 
> Hope this helps!
> 

Thanks Mario

Tests of mine didn't work cause I used createFileSystem (only for zip, jar...)

Lucio

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Re: [VFS] How to resolve all local files relative to a chroot dir ?

Posted by Mario Ivankovits <im...@apache.org>.
info wrote:

>is there anyone can give me some hints how to resolve all absolute
>and relative paths versus a chroot (jail) directory with VFS ?
>  
>
Looks like I was not quite true what I told you in my last post.

You can use the VirtualFileSystem to archive this behaviour:

        FileSystemManager sm = VFS.getManager();
        FileObject fo = sm.resolveFile("file:/home/im/projects");
        FileObject foVirt = sm.createVirtualFileSystem(fo);

If you try to resolve using a relative Path outside "fo" you get an 
"FileSystemException: Invalid relative file name."

Hope this helps!

-- 
Mario


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