I have experienced the same problem with systemd repeatedly trying to start the daemon. Every ~300 μsec for about four hours makes for 71+ million lines of syslog.
As I see the problem, systemd does not consider the clamav-daemon service as failed, when the preconditions are not met. Thus, it will repeatedly attempt to start the service unit, when the socket is used. To get around this problem, I've moved[1] ConditionPathExistsGlob from the .service unit to the .socket unit. By moving the check to the top of the chain, it appears that systemd will not go into an endless loop, trying to fullfill the requirements, that are un-fullfillable. 1. Attached patch: clamav-0.98.7-systemdunit.patch -- //Wegge
diff -uwr --unidirectional-new-file clamav-0.98.7+dfsg.orig/clamd/clamav-daemon.service.in clamav-0.98.7+dfsg/clamd/clamav-daemon.service.in --- clamav-0.98.7+dfsg.orig/clamd/clamav-daemon.service.in 2015-05-06 22:33:56.000000000 +0200 +++ clamav-0.98.7+dfsg/clamd/clamav-daemon.service.in 2015-05-06 22:49:26.000000000 +0200 @@ -2,9 +2,6 @@ Description=Clam AntiVirus userspace daemon Documentation=man:clamd(8) man:clamd.conf(5) http://www.clamav.net/lang/en/doc/ Requires=clamav-daemon.socket -# Check for database existence -ConditionPathExistsGlob=@DBDIR@/main.{c[vl]d,inc} -ConditionPathExistsGlob=@DBDIR@/daily.{c[vl]d,inc} [Service] ExecStart=@prefix@/sbin/clamd --foreground=true Only in clamav-0.98.7+dfsg.orig/clamd: clamav-daemon.socket diff -uwr --unidirectional-new-file clamav-0.98.7+dfsg.orig/clamd/clamav-daemon.socket.in clamav-0.98.7+dfsg/clamd/clamav-daemon.socket.in --- clamav-0.98.7+dfsg.orig/clamd/clamav-daemon.socket.in 1970-01-01 01:00:00.000000000 +0100 +++ clamav-0.98.7+dfsg/clamd/clamav-daemon.socket.in 2015-05-06 22:49:23.000000000 +0200 @@ -0,0 +1,16 @@ +[Unit] +Description=Socket for Clam AntiVirus userspace daemon +Documentation=man:clamd(8) man:clamd.conf(5) http://www.clamav.net/lang/en/doc/ +# Check for database existence +ConditionPathExistsGlob=@DBDIR@/main.{c[vl]d,inc} +ConditionPathExistsGlob=@DBDIR@/daily.{c[vl]d,inc} + +[Socket] +ListenStream=/run/clamav/clamd.ctl +#ListenStream=127.0.0.1:1024 +SocketUser=clamav +SocketGroup=clamav +RemoveOnStop=True + +[Install] +WantedBy=sockets.target
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