Instead of calling 'su' to switch the user, use own implementation of
this. Thanks to PAM it's pretty simple. The main reason is to have
control over process waiting for session termination (to call
pam_close_sesion/pam_end). Especially we don't want it to keep std* fds
open, which would prevent qrexec-agent from receiving EOF when one of
them will be closed.
Also, this will preserve QREXEC_AGENT_PID environment variable.
FixesQubesOS/qubes-issues#2851
It isn't really needed. It was used to workaround libusb bug (causing
crash when the system does not have any USB controller), but since we
use HVM now which do have some USB controllers it isn't needed anymore.
Also, it is not available in stock Fedora kernels.
Qubes VM require few config options in grub. Ship appropriate
configuration. Debian have grub.d support, so it can be done cleanly.
On Fedora, /etc/default/grub needs to be modified. Still keep the
options in separate file, but include it manually from
/etc/default/grub.
QubesOS/qubes-issues#2577
- there are many netcat versions (openbsd, nmap, ...), which behave
differently - especially while handling EOF
- Debian jessie doesn't have nmap-ncat (which handle EOFs sufficiently
good)
QubesOS/qubes-issues#1854
While it doesn't make sense to install qubes-core-agent without qrexec,
it may make sense to do the otherway around - install just
qrexec-agent without all the qrexec services and configuration. For
example on some pre-installed system.
QubesOS/qubes-issues#2771
When a file is moved to other package, the new package needs Replaces:
and Breaks: dependecies on old package. Otherwise dpkg will refuse to
change file ownership.
QubesOS/qubes-issues#2771
This will save a lot of dependencies if networking is not needed in VMs
based on given template. Thanks to updates proxy over qrexec, template
itself do not need to have network configured too.
QubesOS/qubes-issues#2771
In Fedora it makes little sense, but in Debian it allows to avoid a lot
of dependencies. So split in both, to keep it simple.
QubesOS/qubes-issues#2771
