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I have a .service for a process that i don't want to start at boot-time, but to call it somehow from another already running application, at a given time.
The other option would be to put a D-Bus (i'm using glib dbus in my apps ) service file in /usr/share/dbus-1/services and somehow call it from my application. Also, i don't manage to do this either.
Let's say that my dbus service file from /usr/share/dbus-1/services is com.callThis.service
and my main service file from /lib/systemd/system is com.startThis.service
If i run a simple introspect from command line:
/home/root # dbus-send --session --type=method_call --print-reply \
--dest=com.callThis /com/callThis org.freedesktop.DBus.Introspectable.Introspect
the D-Bus service file will get called and it will start what is in the Exec ( com.starThis ). The problem is that i want to achieve this from C/C++ code using D-Bus glib.
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To start a systemd service, executing instructions in the service's unit file, use the start command. If you are running as a non-root user, you will have to use sudo since this will affect the state of the operating system: sudo systemctl start application . service.
Simply type systemctl and add a space, then tap the Tab key twice. Bash displays all available subcommands.
The ExecStop setting is optional and is used to communicate with the service for a clean termination. The process specified by ExecStop will run in case the service crashes.
A combination of g_dbus_connection_send_message with g_dbus_message_new_method_call or g_dbus_message_new_signal should be what you are looking for.
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