systemd: include systemd unit file support

Allow having systemd handling the life cycle of the ModemManager process.

.gitignore

@@ -57,6 +57,7 @@ libwmc/tests/test-wmc
 data/org.freedesktop.ModemManager1.conf
 data/org.freedesktop.ModemManager1.service
 data/org.freedesktop.ModemManager1.policy
+data/ModemManager.service
 data/ModemManager.pc
 data/mm-common.pc
 data/mm-glib.pc

Makefile.am

@@ -3,6 +3,7 @@ SUBDIRS = . build-aux data include libqcdm libwmc libmm-glib src plugins cli int
 
 DISTCHECK_CONFIGURE_FLAGS = \
 	--with-udev-base-dir="$$dc_install_base" \
+	--with-systemdsystemunitdir="$$dc_install_base/$(SYSTEMD_UNIT_DIR)" \
 	--with-tests=yes \
 	--with-docs=yes
 

configure.ac

@@ -110,6 +110,14 @@ else
 fi
 AC_SUBST(UDEV_BASE_DIR)
 
+# systemd system unit directory
+AC_ARG_WITH([systemdsystemunitdir], AS_HELP_STRING([--with-systemdsystemunitdir=DIR], [where systemd service files are]),
+            [], [with_systemdsystemunitdir=$($PKG_CONFIG --variable=systemdsystemunitdir systemd)])
+if test "x$with_systemdsystemunitdir" != xno; then
+    AC_SUBST([SYSTEMD_UNIT_DIR],  [$with_systemdsystemunitdir])
+fi
+AM_CONDITIONAL(HAVE_SYSTEMD, [test -n "$SYSTEMD_UNIT_DIR" -a "$SYSTEMD_UNIT_DIR" != xno ])
+
 # PolicyKit
 AC_ARG_WITH(polkit, AS_HELP_STRING([--with-polkit], [Build with PolicyKit support]))
 AM_CONDITIONAL(WITH_POLKIT, test "x$with_polkit" = "xyes")
@@ -256,6 +264,7 @@ echo "
 
     D-Bus system directory:  ${DBUS_SYS_DIR}
     udev base directory:     ${UDEV_BASE_DIR}
+    systemd unit directory:  ${with_systemdsystemunitdir}
 
     PPP-enabled tests:       ${have_pppd_headers}
     PolicyKit support:       ${with_polkit}

data/Makefile.am

@@ -1,4 +1,11 @@
 
+edit = @sed \
+       -e 's|@sbindir[@]|$(sbindir)|g' \
+       -e 's|@sysconfdir[@]|$(sysconfdir)|g' \
+       -e 's|@localstatedir[@]|$(localstatedir)|g' \
+       -e 's|@libexecdir[@]|$(libexecdir)|g'
+
+
 # DBus Service file
 dbusservicedir = $(DBUS_SYS_DIR)
 dbusservice_DATA = org.freedesktop.ModemManager1.conf
@@ -14,17 +21,28 @@ org.freedesktop.ModemManager1.conf:  $(top_srcdir)/data/$(dbusservice_file_nopol
 endif
 
 
-# DBus Activation file
-edit = @sed \
-       -e 's|@sbindir[@]|$(sbindir)|g' \
-       -e 's|@sysconfdir[@]|$(sysconfdir)|g' \
-       -e 's|@localstatedir[@]|$(localstatedir)|g' \
-       -e 's|@libexecdir[@]|$(libexecdir)|g'
-dbusactivationdir = $(datadir)/dbus-1/system-services
-dbusactivation_in_files = org.freedesktop.ModemManager1.service.in
-dbusactivation_DATA = $(dbusactivation_in_files:.service.in=.service)
-%service: %service.in
+# systemd unit file
+systemdsystemunitdir = $(SYSTEMD_UNIT_DIR)
+systemdsystemunit_in_files = ModemManager.service.in
+if HAVE_SYSTEMD
+systemdsystemunit_DATA = ModemManager.service
+ModemManager.service: ModemManager.service.in
 	$(edit) $< >$@
+endif
+
+
+# DBus Activation file
+dbusactivationdir = $(datadir)/dbus-1/system-services
+dbusactivation_DATA = org.freedesktop.ModemManager1.service
+dbusactivation_in_files_systemd = org.freedesktop.ModemManager1.service.systemd.in
+dbusactivation_in_files_nosystemd = org.freedesktop.ModemManager1.service.nosystemd.in
+if HAVE_SYSTEMD
+org.freedesktop.ModemManager1.service: org.freedesktop.ModemManager1.service.systemd.in
+	$(edit) $< >$@
+else
+org.freedesktop.ModemManager1.service: org.freedesktop.ModemManager1.service.nosystemd.in
+	$(edit) $< >$@
+endif
 
 
 # Icon
@@ -59,8 +77,15 @@ DISTCLEANFILES = \
 	$(dbusactivation_DATA) \
 	$(dbusservice_DATA)
 
+if HAVE_SYSTEMD
+DISTCLEANFILES += $(systemdsystemunit_DATA)
+endif
+
+
 EXTRA_DIST = \
-	$(dbusactivation_in_files) \
+	$(systemdsystemunit_in_files) \
+	$(dbusactivation_in_files_systemd) \
+	$(dbusactivation_in_files_nosystemd) \
 	$(dbusservice_file_polkit) \
 	$(dbusservice_file_nopolkit) \
 	$(icon_DATA) \

data/ModemManager.service.in

@@ -0,0 +1,13 @@
+[Unit]
+Description=Modem Manager
+After=syslog.target
+
+[Service]
+Type=dbus
+BusName=org.freedesktop.ModemManager1
+ExecStart=@sbindir@/ModemManager
+StandardError=null
+
+[Install]
+WantedBy=multi-user.target
+Alias=dbus-org.freedesktop.ModemManager1.service

data/org.freedesktop.ModemManager1.service.systemd.in

@@ -0,0 +1,11 @@
+# This D-Bus service activation file is only for systemd support since
+# an auto-activated NetworkManager would be quite surprising for those people
+# who have MM installed but turned off.  Thus the Exec path available to
+# D-Bus is /bin/false, but systemd knows the real Exec path due to the MM
+# systemd .service file.
+
+[D-BUS Service]
+Name=org.freedesktop.ModemManager1
+Exec=/bin/false
+User=root
+SystemdService=dbus-org.freedesktop.ModemManager1.service