On Wed, Sep 03, 2014 at 11:12:24AM -0400, Rob Owens wrote: > brasero depends on systemd-sysv. Here is the chain of dependencies I've > identified, with the help of some folks on this list: > > brasero -> gvfs -> gvfs-daemons -> udisks2 -> libpam-systemd -> systemd-sysv
No hard evidence of this, but my reasoning would be: * brasero needs gvfs because it wants to access disks, gvfs is the GNOME preferred way to do so. * gvfs needs gvfs-daemons because gvfs-daemons is the actual workhorse. gvfs contains the GIO modules which applications use, but gvfs-daemons contains the code which queries the disks etc. * gvfs-daemons depends on udisks2 because udisks2 is a desktop-oriented interface to various common hard disks. gvfs-daemons appears to provide a superset of udisks's capabilities, though because it also depends on things like libbluray1. * udisks2 depends on libpam-systemd. I suspect this is so that udisks can access, for example, USB keys inserted at the console. This has been a kludgey point for a while - how do you allow someone sitting at a console to plug in a USB key and access that (in the same manner that they are given access to the local keyboard, video card etc) but restrict that to other users of the computer? libpam-systemd (and thus logind) solve this by marking a login as being from the console and applications can then tie things to that. * libpam-systemd depends on systemd-sysv because it needs, for example, the cgroups functionality which compartmentalises the processes of a console user. So, it's not that brasero needs systemd (if it did, it would probably say so), but rather it depends on utilities which - in addition to the features directly needed by brasero - provide features provided by systemd. This is akin, perhaps, to wondering why brasero depends on libxdmcp (brasero -> libcairo2 -> libx11-6 -> libxcb1 -> libxdmcp6). Brasero doesn't need XDMCP access itself, but it depends (indirectly) on a library which does. > > For now I'd like to ignore the option of using systemd-shim and just examine > why a cd burning application depends on a particular init system. My goal is > to either 1) understand why it has to be this way, or 2) understand enough > that I can submit a bug for one of the above packages to break this chain. > > Michael Biebl already informed me that brasero uses gvfs to detect removable > media (thanks for that). Apparently there are other methods available > (xfburn doesn't use gvfs), but the brasero developers have chosen to use > gvfs. > > I'm going to need help understanding the rest of the dependencies. > > I'd also like to know if there are any features of brasero that *really* > require systemd to be used as the init system -- features that would not work > with sysvinit. I'm hoping Michael or some other developers can chime in on > this one. > > -Rob > > > -- > To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org > with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org > Archive: > https://lists.debian.org/1678022633.1343152.1409757144797.javamail.zim...@ptd.net >
signature.asc
Description: Digital signature
