usbdevfs can be mounted multiple times

[Pavel Roskin]

Hello!

I understand that root can do many strange and unsafe things, but mounting
the same filesystem many times is not allowed for systems other than
usbdevfs.

[root@fonzie proski]# mount
/dev/ide/host0/bus0/target0/lun0/part1 on / type reiserfs (rw)
none on /proc type proc (rw)
none on /dev/pts type devpts (rw,gid=5,mode=620)
none on /proc/bus/usb type usbdevfs (rw)
[root@fonzie proski]# mount /proc/bus/usb
[root@fonzie proski]# mount /proc/bus/usb
[root@fonzie proski]# mount /proc/bus/usb
[root@fonzie proski]# mount /proc/bus/usb
[root@fonzie proski]# mount
/dev/ide/host0/bus0/target0/lun0/part1 on / type reiserfs (rw)
none on /proc type proc (rw)
none on /dev/pts type devpts (rw,gid=5,mode=620)
none on /proc/bus/usb type usbdevfs (rw)
none on /proc/bus/usb type usbdevfs (rw)
none on /proc/bus/usb type usbdevfs (rw)
none on /proc/bus/usb type usbdevfs (rw)
none on /proc/bus/usb type usbdevfs (rw)
[root@fonzie proski]# mount /dev/pts
mount: none already mounted or /dev/pts busy
mount: according to mtab, none is already mounted on /dev/pts
[root@fonzie proski]# mount --version
mount: mount-2.10p
[root@fonzie proski]# uname -a
Linux fonzie 2.4.2-ac8 #3 Fri Mar 2 12:59:44 EST 2001 i686 unknown
[root@fonzie proski]#

Regards,
Pavel Roskin