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Date: Thu, 03 Aug 2006 09:13:07 -0500
From: Eric Sandeen <sandeen@sandeen.net>
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Subject: Re: "xfs_io -c chattr +i " on a symlink
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To: Dan Am <xfs@lonx.net>
Cc: xfs@oss.sgi.com

Dan Am wrote:
> (resend, since I used the wrong account to send the initial mail, sorry)
> 
> Dear list,
> 
> I am trying to make a symlink immutable with chattr, however the command
> seems to follow the link, which point to a NFS Mount.
> Setting xattr works on symlink btw, which is useful.
> More data below
> Any ideas ?
> 
> Best Regards
> Dan
> 
> Heres the situation from my machine's view:
> /data > ls -l bin
> lrwxrwxrwx  1 root root 48 Aug  2 15:53 bin -> /archive/l01abnfs07/bin
> 
> /data> xfs_io  -c "chattr +i" bin
> xfs_io: specified file ["bin"] is not on an XFS filesystem
> 
> ~ > xfs_io -V
> xfs_io version 2.8.4

Try just using chattr.

[sandeen@sandeen ~]$ ln -s /tmp tmplink
[sandeen@sandeen ~]$ ls -l tmplink
lrwxrwxrwx  1 sandeen sandeen 4 Aug  3 09:05 tmplink -> /tmp
[sandeen@sandeen ~]$ su
Password:
[root@sandeen sandeen]# chattr +i tmplink
[root@sandeen sandeen]# stat -f tmplink
   File: "tmplink"
     ID: 802      Namelen: 255     Type: XFS (0x58465342)
Blocks: Total: 23377204   Free: 8557099    Available: 8557099    Size: 4096
Inodes: Total: 93554496   Free: 93202008
[root@sandeen sandeen]#
[root@sandeen sandeen]# lsattr tmplink
----i-------- tmplink

xfs_io also has an option to try to do operations even on non-xfs filesystems, 
if that helps... if it follows the link & sets the attr on the link target, that 
may not be behaving as expected though.

-Eric