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elvisd
n00b
Joined: 30 Jan 2006
Posts: 17
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 Posted: Tue Feb 14, 2006 7:45 am Post subject: sudo a gui application [solved] |
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Hi all,
i'm trying to launch some GUI application that needs su privileges (i.ex. gdmsetup). I open my shell and type
The application won't start, i have this error:
| Code: | | (gdmsetup:7865): Gtk-WARNING **: cannot open display: |
In ubuntu that worked fine for every GUi and non-GUi application. Now not. Should i configure something more to have this run?
I have installed gksu and this runs... but I'd like to know why not sudo...
Thank you all
Best regards
elvisd
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Last edited by elvisd on Tue Feb 14, 2006 9:57 am; edited 1 time in total |
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brims
Guru
Joined: 19 Apr 2004
Posts: 492
Location: Arizona
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elvisd
n00b
Joined: 30 Jan 2006
Posts: 17
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| Posted: Tue Feb 14, 2006 7:53 am Post subject: |
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Thax for reply.
I have tried exporting the DISPLAY but gives me the same error. |
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yota
n00b
Joined: 17 Jul 2005
Posts: 17
Location: Padova (Italy)
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| Posted: Tue Feb 14, 2006 7:59 am Post subject: |
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The user root is not authorized to connect to the x server (that is owned by the user you open the graphic session with).
You can give the permission to root with:
or to erveryone:
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ecatmur
Advocate
Joined: 20 Oct 2003
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Location: Edinburgh
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piercey
Apprentice
Joined: 28 Jan 2005
Posts: 182
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| Posted: Tue Feb 14, 2006 9:31 am Post subject: |
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or, you could just:
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skellr
l33t
Joined: 18 Jun 2005
Posts: 975
Location: The Village, Portmeirion
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| Posted: Tue Feb 14, 2006 9:35 am Post subject: |
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I've always used su -c to run GUI apps, untill today.
There are some good examples to put in your sudoers file near the bottom of this page that helps. namely env_keep=DISPLAY
http://www.gentoo.org/doc/en/sudo-guide.xml
Totaly missed noticing env_keep mentioned in the sudoers man page.  |
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elvisd
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Joined: 30 Jan 2006
Posts: 17
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| Posted: Tue Feb 14, 2006 9:57 am Post subject: |
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Thank you. this last reply solved my issue. 
I have added a line like this in my /etc/sudoers file:
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Defaults:elvisd env_keep=DISPLAY
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Thank you!
Best regards
elvisd
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lyallp
Veteran
Joined: 15 Jul 2004
Posts: 1557
Location: Adelaide/Australia
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| Posted: Wed Aug 01, 2007 11:44 am Post subject: |
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I have successfully kept my DISPLAY by updating /etc/suders such that members of the wheel group keep environment variable DISPLAY only.
| ecatmur wrote: | DO NOT use xhost. It's a colossal security hole.
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Well, given I use xhost +local:root - ie, only root can open windows on my display, I am unsure how this can be a security hole. I fully understand if I just used xhost +
| ecatmur wrote: |
You probably need to add pam_xauth.so to /etc/pam.d/sudo:
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session optional pam_xauth.so
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What does this achieve? Does it make sudo use an X window to prompt for the password?
If so, it's not doing it for me.
Does this line have to be in any place in particular in the /etc/pam.d/sudo file?
I also noticed that the /etc/pam.d/sudo file is auto generated by pamd_mimic_system - so where should I be updating settings so that my mods will stay put?
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tarpman
Veteran
Joined: 04 Nov 2004
Posts: 1083
Location: Victoria, BC, Canada
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| Posted: Wed Aug 01, 2007 3:08 pm Post subject: |
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try gksu or kdesu
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Saving the world, one kilobyte at a time. |
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xnij2
n00b
Joined: 27 Jun 2006
Posts: 20
Location: Solna, Sweden
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| Posted: Mon Aug 06, 2007 7:55 am Post subject: |
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The sudo env_keep trick worked great! So thanks for that Rainskellr. I've also been doing sudo -c to run gui stuff.
What about the XAUTHORITY environment variable? Should that also be exported? Seems to work without it here tho...
| Code: | | Defaults env_keep="DISPLAY XAUTHORITY" |
(from http://gentoo-wiki.com/Sudo_config) |
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