$this->bbcode_second_pass_code('', '# cat mtab
rootfs / rootfs rw 0 0
/dev/root / ext3 rw,relatime,errors=continue,user_xattr,acl,data=writeback 0 0
devtmpfs /dev devtmpfs rw,size=62632k,nr_inodes=15658,mode=755 0 0
proc /proc proc rw,nosuid,nodev,noexec,relatime 0 0
sys /sys sysfs rw,nosuid,nodev,noexec,relatime 0 0
run /run tmpfs rw,nosuid,nodev,relatime,mode=755 0 0
devpts /dev/pts devpts rw,nosuid,noexec,relatime,gid=5,mode=620,ptmxmode=000 0 0
shm /dev/shm tmpfs rw,nosuid,nodev,relatime 0 0
tmpfs /tmp tmpfs rw,nosuid,nodev,relatime 0 0
/dev/root /srv/nfs4/share ext3 rw,relatime,errors=continue,user_xattr,acl,data=writeback 0 0
rpc_pipefs /var/lib/nfs/rpc_pipefs rpc_pipefs rw,relatime 0 0
nfsd /proc/fs/nfsd nfsd rw,nosuid,nodev,noexec,relatime 0 0
')
it looks like the binded directory is mounted.