Bug#984782: xrdp session is not using the same PATH as a console session
Package: xrdp
Severity: normal
Tags: patch
xrdp project member here.
While working on an xrdp issue
(https://github.com/neutrinolabs/xrdp/issues/1773) we ascertained that
the PATH elements /bin and /usr/bin were swapped between a console
session and an xrdp session.
This is on a Kubuntu system.
The consequence of this was that the timeshift-gtk executable was being
found in /bin on the xrdp session. Consequently, polkit was unable to
find the correct action to apply, and the invocation failed. When run
explicitly from /usr/bin, the invocation succeeded.
Further investigation showed that on Ubuntu flavours, pan_env.so is
being used to set the PATH (and indeed the locale). Unlike the Buster
system I've got here, the PATH isn't set explicitly in /etc/profile.
For xrdp issue #1773, we resolved user's immediate problem by applying
this patch to /etc/xrdp/startwm.sh:-
--- startwm.sh.orig 2021-01-13 13:02:36.017117908 +0000
+++ startwm.sh 2021-01-12 13:50:10.396884171 +0000
@@ -2,6 +2,11 @@
# xrdp X session start script (c) 2015, 2017 mirabilos
# published under The MirOS Licence
+# Emulate pam_env.so
+if test -r /etc/environment; then
+ . /etc/environment
+fi
+
if test -r /etc/profile; then
. /etc/profile
fi
Note that this file is an upstream file to the xrdp project.
This bug is a request to either adopt the patch above, or include
the corresponding pam_env calls in /etc/pam.d/xrdp-sesman. An
advantage of the second is that I believe you would be able to
remove the locale stuff from /etc/xrdp/startwm.sh, but I haven't
tested this.
I originally reported this fault on 2021-01-13 as
https://bugs.launchpad.net/ubuntu/+source/xrdp/+bug/1911435, but now
realise that this wasn't at all helpful.
-- System Information:
Debian Release: bullseye/sid
APT prefers focal-updates
APT policy: (500, 'focal-updates'), (500, 'focal-security'), (500,
'focal'), (100, 'focal-backports')
Architecture: amd64 (x86_64)
Foreign Architectures: i386
Kernel: Linux 5.8.0-44-generic (SMP w/2 CPU cores)
Locale: LANG=en_GB.UTF-8, LC_CTYPE=en_GB.UTF-8 (charmap=UTF-8),
LANGUAGE=en_GB:en (charmap=UTF-8)
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled
Versions of packages xrdp depends on:
ii adduser 3.118ubuntu2
ii init-system-helpers 1.57
ii libc6 2.31-0ubuntu9.2
ii libfuse2 2.9.9-3
ii libjpeg8 8c-2ubuntu8
ii libopus0 1.3.1-0ubuntu1
ii libpam0g 1.3.1-5ubuntu4.1
ii libssl1.1 1.1.1f-1ubuntu2.2
ii libx11-6 2:1.6.9-2ubuntu1.1
ii libxfixes3 1:5.0.3-2
ii libxrandr2 2:1.5.2-0ubuntu1
ii lsb-base 11.1.0ubuntu2
ii ssl-cert 1.0.39
Versions of packages xrdp recommends:
ii fuse 2.9.9-3
pn xorgxrdp <none>
Versions of packages xrdp suggests:
pn guacamole <none>
pn xrdp-pulseaudio-installer <none>
Reply to: