== readlink /proc/1/file (root init) ==
/sbin/init
== readlink /proc/1/exe (root init) ==
/sbin/init
== spawn a root sleep and leak its binary path ==
pid=0 uid=0 file=unknown
pid=1 uid=0 file=/sbin/init
pid=278 uid=0 file=/sbin/dhclient
pid=286 uid=0 file=/sbin/dhclient
pid=390 uid=0 file=/sbin/devd
pid=466 uid=0 file=/usr/sbin/syslogd
pid=68 uid=0 file=/sbin/hammer2
pid=710 uid=0 file=/usr/sbin/sshd
BUG-REPRODUCED: unpriv readlink of /proc/<root-pid>/file yields binary path
FILE_RC=0