On 10/05/2015 12:59 PM, Iñigo Martínez wrote: > In a home made daemon, I needed to change some variables while > running, so I though about D-Bus as IPC and gived a chance to sd-bus. > > Let's say that I'm trying it on a development system (currently a > debian jessie) without any users on it, just root, and some basic > libraries and configuration. > > After reading Lennarts article[0] I tried to compile the bus-service.c > example. Here came the first problem: > > Failed to connect to system bus: No such file or directory > > Obviously, as the system isn't executing a user bus, the service can't > find it, so I fixed it by changing: > > r = sd_bus_open_user(&bus); > > to: > > r = sd_bus_open_system(&bus);
Which is probably what you want to do anyway in case your daemon is supposed to be accessible system-wide. > This way it uses a new connection to the system bus instead of the > nonexistent user bus, but it doesn't work either with a new problem > when requesting the name: > > Failed to acquire service name: Permission denied Owning a name is something the D-Bus daemon has to explicitly allow your code to do, through an XML policy file. See /etc/dbus-1/system.d/* for examples, and the dbus-daemon(1) man page for details. HTH, Daniel _______________________________________________ systemd-devel mailing list systemd-devel@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/systemd-devel
