dovecot: add systemd support and add user dovecot dovenull which is need to start dovecot service.

Signed-off-by: Li Xin <lixin.fnst@cn.fujitsu.com>
Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>
Signed-off-by: Joe MacDonald <joe_macdonald@mentor.com>

meta-networking/recipes-support/dovecot/dovecot/dovecot.service

@@ -0,0 +1,14 @@
+[Unit]
+Description=Dovecot IMAP/POP3 email server
+After=local-fs.target network.target
+
+[Service]
+Type=simple
+EnvironmentFile=-@SYSCONFDIR@/sysconfig/dovecot
+ExecStart=@SBINDIR@/dovecot -F
+ExecReload=/bin/kill -HUP $MAINPID
+NonBlocking=yes
+
+[Install]
+WantedBy=multi-user.target
+

meta-networking/recipes-support/dovecot/dovecot/dovecot.socket

@@ -0,0 +1,14 @@
+[Unit]
+Description=Dovecot IMAP/POP3 email server activation socket
+
+[Socket]
+#dovecot expects separate IPv4 and IPv6 sockets
+BindIPv6Only=ipv6-only
+ListenStream=0.0.0.0:143
+ListenStream=[::]:143
+ListenStream=0.0.0.0:993
+ListenStream=[::]:993
+KeepAlive=true
+
+[Install]
+WantedBy=sockets.target

meta-networking/recipes-support/dovecot/dovecot_2.2.10.bb

@@ -7,13 +7,15 @@ LIC_FILES_CHKSUM = "file://COPYING;md5=a981379bd0f1c362f8d1d21515e5b30b"
 SRC_URI = "http://dovecot.org/releases/2.2/dovecot-${PV}.tar.gz \
            file://0001-configure.ac-convert-AC_TRY_RUN-to-AC_TRY_LINK-state.patch \
            file://building-rquota_xdr.c-depend-on-rquota.h.patch \
-          "
+           file://dovecot.service \
+           file://dovecot.socket"
+
 SRC_URI[md5sum] = "037e9c9e07d9dbff54dcff09f280fc8c"
 SRC_URI[sha256sum] = "75592483d40dc4f76cc3b41af40caa4be80478946a699d46846d5d03e4d2e09b"
 
 DEPENDS = "openssl xz zlib bzip2 libcap"
 
-inherit autotools pkgconfig
+inherit autotools pkgconfig systemd useradd
 
 PACKAGECONFIG ??= " \
                    ${@base_contains('DISTRO_FEATURES', 'ldap', 'ldap', '', d)} \
@@ -37,7 +39,25 @@ CACHED_CONFIGUREVARS += "i_cv_signed_size_t=no \
 
 # hardcode epoll() to avoid running unsafe tests
 # BSD needs kqueue and uclibc poll()
-EXTRA_OECONF = " --with-ioloop=epoll"
+EXTRA_OECONF = " --with-ioloop=epoll \
+                 --with-systemdsystemunitdir=${systemd_unitdir}/system"
+
+SYSTEMD_PACKAGES = "${PN}"
+SYSTEMD_SERVICE_${PN} = "dovecot.service dovecot.socket"
+SYSTEMD_AUTO_ENABLE = "disable"
+
+do_install_append () {
+    install -d 755 ${D}/etc/dovecot
+    touch 644 ${D}/etc/dovecot/dovecot.conf
+    install -m 0644 ${WORKDIR}/dovecot.service ${D}${systemd_unitdir}/system
+    sed -i -e 's#@SYSCONFDIR@#${sysconfdir}#g' ${D}${systemd_unitdir}/system/dovecot.service
+    sed -i -e 's#@SBINDIR@#${sbindir}#g' ${D}${systemd_unitdir}/system/dovecot.service
+}
+
+USERADD_PACKAGES = "${PN}"
+USERADD_PARAM_${PN} = "-r -d ${libexecdir} -M -s ${base_sbindir}/nologin -g dovecot dovecot; \
+                      -r -d ${libexecdir} -M -s ${base_sbindir}/nologin -g dovenull dovenull"
+GROUPADD_PARAM_${PN} = "-f -r dovecot;-f -r dovenull"
 
 FILES_${PN}-staticdev += "${libdir}/dovecot/*/*.a"
 FILES_${PN}-dev += "${libdir}/dovecot/*.so"