bug#10710: 23.4; left-over dbus processes

bug#10710: 23.4; left-over dbus processes

[Per Starback]

In GNU Emacs 23.4.1 (i686-pc-linux-gnu, GTK+ Version 2.18.9)
Windowing system distributor `Red Hat, Inc.', version 11.0.11004000
configured using `configure  '--prefix' '/local''
(It's CentOS 6.2.)

  $ ssh -Y somehost
  somehost$ emacs -Q --kill
  somehost$ pstree `id -un`
  dbus-daemon---{dbus-daemon}
  
  dbus-launch
  
  gconfd-2
  
  sshd---bash---pstree

So several dbus processes are created and left behind afterwards, which
is inconvenient. I found

  http://lists.gnu.org/archive/html/emacs-devel/2009-08/msg00940.html

which addresses a similar problem (where also dbus processes are created
after ssh + X).

bug#10710: 23.4; left-over dbus processes

[Michael Albinus]

starback@stp.lingfil.uu.se (Per Starback) writes:

>   $ ssh -Y somehost
>   somehost$ emacs -Q --kill
>   somehost$ pstree `id -un`
>   dbus-daemon---{dbus-daemon}
>   
>   dbus-launch
>   
>   gconfd-2
>   
>   sshd---bash---pstree

If you analyze further, you'll see:

# ps -eaf | grep dbus-launch
albinus    4821     1  0 21:48 pts/3    00:00:00 dbus-launch --autolaunch 716f0514c3c408105bcdc5494b5c3d04 --binary-syntax --close-stderr

D-Bus is launched via the auto-launch feature of libdbus. This is
activated by default, if $DISPLAY is set. The invocation command as seen
above is hard-coded in dbus-sysdeps-unix.c, we cannot change it
ourselves.

It would be helpful, if the dbus-launch command would be called with the
--exit-with-session argument, but it isn't. I have no idea how to change
this behaviour.

Best regards, Michael.

bug#10710: 23.4; left-over dbus processes

[Chong Yidong]

Michael Albinus <michael.albinus@gmx.de> writes:

> D-Bus is launched via the auto-launch feature of libdbus. This is
> activated by default, if $DISPLAY is set. The invocation command as seen
> above is hard-coded in dbus-sysdeps-unix.c, we cannot change it
> ourselves.

Closing this bug, since it doesn't seem to be an Emacs issue.

bug#10710: 23.4; left-over dbus processes

[Per Starbäck]

> Closing this bug, since it doesn't seem to be an Emacs issue.

It's an issue for Emacs since it means problems for Emacs users.
If there is no workaround for this problem I think "--without-gconf"
should be the default when compiling Emacs. Since font-use-system-font
is nil by default most users won't have use for the gconf support
anyway. (Or is it used for anything else?)

bug#10710: 23.4; left-over dbus processes

[Michael Albinus]

starback@stp.lingfil.uu.se (Per Starbäck) writes:

> It's an issue for Emacs since it means problems for Emacs users.
> If there is no workaround for this problem I think "--without-gconf"
> should be the default when compiling Emacs. Since font-use-system-font
> is nil by default most users won't have use for the gconf support
> anyway. (Or is it used for anything else?)

I don't know whether it is an Emacs issue. Most of the people would
install Emacs as bundled by their preferred GNU/Linux distribution. So
you would need to ask the distributor.

And a distributor could solve it even otherwise, for example providing a
libdbus-1.so compiled with "--enable-x11-autolaunch=no".

Btw, it isn't only Emacs which suffers from this problem. I have
replayed your initial scenario, starting "gedit" instead of "emacs -Q".
Same result.

Best regards, Michael.