[Pkg-sysvinit-devel] Bug#633845: initscripts: unupgradeable on vserver

[Roger Leigh]

On Thu, Jul 14, 2011 at 01:21:54PM +0200, Adam Borowski wrote:
> On Thu, Jul 14, 2011 at 12:15:40PM +0100, Roger Leigh wrote:
> > On Thu, Jul 14, 2011 at 01:01:20PM +0200, Adam Borowski wrote:
> > > On Thu, Jul 14, 2011 at 11:57:29AM +0100, Roger Leigh wrote:
> > > > What is the return value of ischroot in the vserver (when run as
> > > > root)?
> > > 
> > > 2 (failure to detect)
> > 
> > Does /proc (/proc/1/root) exist inside the vserver?  Is /proc
> > available during normal vserver operation?
> 
> It exists, but is unreadable, even to root:
> 
> [~]# ls -al /proc/1/root 
> ls: cannot read symbolic link /proc/1/root: Permission denied
> lrwxrwxrwx 1 root root 0 Jul 14 10:57 /proc/1/root

Is /proc/self/vinfo readable?  We were using the following logic
prior to the use of ischroot.  Does it work correctly for you?

if [ -e /proc/self/vinfo ]; then
        # If XID: 0 is found, we're a vserver
        # host, *not* a guest, hence return
        # false
        if grep '^XID:[[:space:]]*0$' /proc/self/vinfo 2>&1 >/dev/null; then
                return 1
        fi
fi

If it does, we'll need to put this logic into ischroot I think.


Thanks,
Roger

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