Public bug reported:
In Ubuntu 14.04; package xrdp, version 0.6.0-1:
If /etc/X11/Xsession is not a /bin/sh script, xrdp sessions may not
start.
The trouble is that /etc/xrdp/startwm.sh begins with
#!/bin/sh
and executes Xsession with
. /etc/X11/Xsession
If Xsession contains anything that is not a valid /bin/sh command, an
error may result; depending on the error, Xsession may misbehave
(leaving an improperly-set-up session) or just exit (abruptly
terminating the session).
Live example: we have a heavily-localised Xsession file. It is a bash script;
its first line is
#!/bin/bash
It contains some commands that are valid bash but not valid /bin/sh (==
dash). They are sufficiently invalid that Xsession exits. Hence no one
can make a useful session via RDP.
The same Xsession file has worked for years with kdm, so it is not a
general assumption that Xsession is a /bin/sh script; in fact I think
the general X11 rule is that it's just some sort of executable.
A simple fix is to replace the offending line in startwm.sh with
exec /etc/X11/Xsession
(Or just /etc/X11/Xsession without the exec, but it's the last line of
the file, so there's no reason to keep the extra process hanging
around.) This lets the kernel decide what to do about Xsession,
#!/bin/bash tells it what to do, and everything works.
Thanks!
** Affects: xrdp (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1693518
Title:
xrdp fails if Xsession not /bin/sh script
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