On Thu, Jul 14, 2011 at 01:29:44PM +0100, Roger Leigh wrote: > 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?
It is. > 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 It does. Returns 1 on the host, passes through on guest. Both on lenny and squeeze kernels. -- 1KB // Yo momma uses IPv4! -- To UNSUBSCRIBE, email to [email protected] with a subject of "unsubscribe". Trouble? Contact [email protected]
