Something

[root@mail clamav]# ll
total 4
srwxrwxrwx 1 clamav clamav 0 Feb 26 16:04 clamd
-rw-rw---- 1 clamav clamav 5 Feb 26 16:04 clamd.pid
[root@mail clamav]# su sneaky_user
[sneaky_user@mail clamav]$ socat stdin /var/run/clamav/clamd
VERSION
ClamAV 0.92/6005/Tue Feb 26 14:01:21 2008
[sneaky_user@mail clamav]$ socat stdin /var/run/clamav/clamd
SHUTDOWN
[sneaky_user@mail clamav]$ exit
exit
[root@mail clamav]# service clamd status
clamd dead but subsys locked