Could you, experts, explain me (and maybe others) what the role of
logind, consolekit and polkit is exactly?
What I understand from your discussion is that consolekit and
logind are doing the same thing and stepping on each others feet.
Gentoo's consolekit wiki tells the following:
*ConsoleKit* is a framework for defining and tracking users, login
sessions, and seats. ConsoleKit's primary function is to support
multi-user setups. It also works for a single user, but offers no
benefits compared to existing methods.
ConsoleKit is a D-Bus daemon and creates for each PAM session its own
session. All applications in that session can make use of the
permissions granted to this session. ConsoleKit determines if the
session is local (created by a local user in contrast to users logged
in over the network), and if the session is active (meaning it's the
most recent session). Based on these distinctions, ConsoleKit assigns
device file permissions (e.g. for audio, video and more) to the
session. Other software like polkit also make use of these distinctions
According to this wiki, the role of consolekit (and/or logind) is
to make a distinction between local and remote sessions, to grant more
permissions to the first (which seems futile). But why do we need both
logind/consolekit and polkit ?
I understand udisks asks the permission (through PAM)to either
logind or consolekit for mounting removable disks, which is a
priviledged operation. I'm not sure how pmount does, but, on my Ascii
install, udisks fails on mmcblk0p1 while pmount succeeds.
Thanks.
Didier
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