For some window managers (fvwm2 and fvwm3) if the X server isn't
running and has output it's possible for the window manager to fail or
reconfigure randr incorrectly.
With xrdp-waitfox:
- Install xrdp-waitfox to the BIN dir.
- sesman will run xrdp-waitfox as the logged in user.
- Set an alarm to exit after 30 seconds.
- Try to open env DISPLAY value's display (10 seconds).
- Test for RandR extension.
- Wait for outputs to appear (10 seconds).
The TCP socket implementation of sesman has a number of limitations,
namely that it is affected by firewalls, and also that determining the
user on the other end requires a full authentication process.
The advantage of the TCP socket is that sesman and xrdp can be run on
separate machines. This is however not supported by the xorgxrdp
backend (shared memory), and is insecure, in that passwords are sent
in-the-clear, and the connection is susceptible to MitM attacks. This
architecture has been deprecated in release notes since xrdp v0.9.17,
and although it will continue to be supported in any further releases
in the x0.9.x series, it will not be supported in the next major
version.
When sesman used a standard TCP socket, we were guaranteed only one copy
of sesman could run on on address, as standard TCP listening rules
enforced this. This isn't the case with Unix Domain sockets. This
module implements a locking mechanism for a UDS which emulates the
standard TCP socket behaviour.
as it was undocumented and few people know reconnectwm.sh is executed on
client reconnect. The behaviour of startwm.sh / reconnectwm.sh should
be documented. This is a first step of documenting them.
Use XRDP_SOCKET_PATH in file_loc.h
Don't define any non-socket paths in file_loc.h, they should come from
the makefiles.
Define all paths unconditionally, they should not be defined elsewhere.
Pass XRDP_SOCKET_PATH as environment variable to the backends.
AM_CPPFLAGS is for flags passed to the preprocessor, such as defines and
includes. AM_CFLAGS is for flags affecting the compiler, such as debug
and optimization settings.
INCLUDES is an obsolete name. Users can pass INCLUDES and break
compilation. AM_CPPFLAGS is more explicit that the flags come from
Automake and should not be overridden.
