Xsession sourced scripts shouldn't be run using user's default shell

Bug #1364173 reported by V字龍(Vdragon) on 2014-09-01
6
This bug affects 1 person
Affects Status Importance Assigned to Milestone
KDE Base Workspace
Unknown
Medium
kde-workspace (Ubuntu)
Undecided
Unassigned
xorg (Ubuntu)
Undecided
Unassigned

Bug Description

Recently I encountered a problem that my input method malfunctions because the environmental variables are wrongly set(which is, fully configured using im-config), after hours of debugging I found that it's Z-shell(my current default shell)'s bug that prematurely quits before the Xsession.d im-config input method configure script completes.

The problem is, /etc/X11/Xsession (and all the Xsession.d scripts it sourced) **shouldn't** be run in Z-shell. Patching /etc/kde4/kdm/Xsession # invoke global X session script. code from
. /etc/X11/Xsession
to
/etc/X11/Xsession

workarounded the issue (however I have no idea why). Switching to other display managers instead of KDM worked also)

Reproducible: Always

Steps to Reproduce:
Currently there's no simple reproduce method as another software(zsh)'s bug involved.

V字龍(Vdragon) (vdragon) wrote :
Changed in xorg (Ubuntu):
status: New → Invalid
affects: dummy-kdm (Ubuntu) → kde-workspace (Ubuntu)
description: updated

Recently I encountered a problem that my input method malfunctions because the environmental variables are wrongly set(which is, fully configured using im-config), after hours of debugging I found that it's Z-shell(my current default shell)'s bug that prematurely quits before the Xsession.d im-config input method configure script completes.

The problem is, /etc/X11/Xsession (and all the Xsession.d scripts it sourced) **shouldn't** be run in Z-shell. Patching /etc/kde4/kdm/Xsession # invoke global X session script. code from
. /etc/X11/Xsession
to
/etc/X11/Xsession

workarounded the issue (however I have no idea why). Switching to other display managers instead of KDM worked also)

Reproducible: Always

Steps to Reproduce:
Currently there's no simple reproduce method as another software(zsh)'s bug involved.

Downstream bug report:
Bug #1364173 “Xsession sourced scripts shouldn't be run using us...” : Bugs : KDE Base Workspace
https://bugs.launchpad.net/kdebase-workspace/+bug/1364173

description: updated
Changed in kdebase-workspace:
importance: Unknown → Medium
status: Unknown → New

Here's the Zsh bug report end that Zsh is behave properly, but not the same way as Bash do.
Z-Shell breaks im-config configuration scripts, making input method malfunction
http://www.zsh.org/mla/workers/2014/msg00886.html

I found out that kdm runs /etc/kde4/kdm/Xsession using user's default shell.
http://i.imgur.com/xyiJ1b8.jpg

It is not sane as in Xsession(5) manpage notes:
/etc/X11/Xsession is a Bourne shell (sh(1)) script which is run when an X Window System session is begun by startx(1) or a display manager such as xdm(1).

Changed in kdebase-workspace:
status: New → Unknown
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