[9fans] Permission Problem with p9p vnfs

[9fans] Permission Problem with p9p vnfs

[Matthias Teege]

Moin,

I run "vnfs -L -i -b16k -c1k venti.score" on linux and mount it with
"vmount 127.0.0.1 /dump". If I try to access a private file as root I've
got "permission denied".

# id
uid=0(root) gid=0(root)
# ls -al /dump/a/2009/0427/home/x/
drwx------ 2 2004 2004  1024 Feb 27 09:29 .ssh
# ls -al /dump/a/2009/0427/home/x/.ssh/
ls: cannot open directory /dump/a/2009/0427/home/x/.ssh/: Permission denied

For restore I need access to all files. How do I get permission to a
private file without changing to the uid of the file?

Many thanks
Matthias

Re: [9fans] Permission Problem with p9p vnfs

[Russ Cox]

On Thu, May 14, 2009 at 3:06 AM, Matthias Teege <matthias-9fns@mteege.de> wrote:
> Moin,
>
> I run "vnfs -L -i -b16k -c1k venti.score" on linux and mount it with
> "vmount 127.0.0.1 /dump". If I try to access a private file as root I've
> got "permission denied".

You need to edit src/libdiskfs/*.c to change
the access routines to add

        have = ino.mode&0777;
        if(ino.uid == au->uid)
                have >>= 6;
        else if(ino.gid == au->gid || ingroup(au, ino.gid))
                have >>= 3;
        if(au->uid == 0)        // <<< these two lines
                have = 7;

Russ