agent: no need to wait for detach events if nobody is attached

Change-Id: I1eca3ac8d009fc468568be77ac81d8a7cecc3c13

agent/Makefile

@@ -6,6 +6,7 @@ all : pcocc-agent
 pcocc-agent : $(FILES)
 	GOPATH=$(PWD) go get github.com/sirupsen/logrus
 	GOPATH=$(PWD) go get github.com/onrik/logrus/filename
+	GOPATH=$(PWD) go get github.com/golang/protobuf/proto
 	GOPATH=$(PWD) go build ./src/pcocc-agent.go
 
 install:

agent/pcocc-agent.spec

@@ -0,0 +1,54 @@
+%define        __spec_install_post %{nil}
+%define          debug_package %{nil}
+%define        __os_install_post %{_dbpath}/brp-compress
+
+%{?systemd_requires}
+BuildRequires: systemd
+
+Summary: The pcocc guest agent
+Name: pcocc-agent
+Version: 0.1
+Release: 1
+License: GPL
+Group: Development/Tools
+SOURCE0 : %{name}-%{version}.tar.gz
+URL: https://github.com/cea-hpc/pcocc-agent
+
+BuildRequires: make
+
+BuildRoot: %{_tmppath}/%{name}-%{version}
+
+%description
+%{summary}
+
+%prep
+%setup -q
+
+%build
+make %{?_smp_mflags}
+
+%install
+%make_install
+
+%clean
+rm -rf %{buildroot}
+
+
+%files
+%defattr(-,root,root,-)
+/sbin/*
+/etc/systemd/system/*
+
+%changelog
+
+
+%post
+%systemd_post pcocc-agent.service
+
+%preun
+%systemd_preun pcocc-agent.service
+
+%postun
+%systemd_postun_with_restart pcocc-agent.service
+
+

agent/src/command/command.go

@@ -522,7 +522,7 @@ func (em *ExecManager) detachAllExecs() (error) {
 	em.Lock.Lock()
 	defer em.Lock.Unlock()
 
-	if !em.isDetaching {
+	if  !em.isDetaching && em.attachCount > 0 {
 		em.isDetaching = true
 		for _, ex := range em.Execs {
 			// We cant hold the lock here because it's