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DaggyStyle
Watchman
Joined: 22 Mar 2006
Posts: 5909
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 Posted: Mon May 27, 2013 6:08 pm Post subject: Failed to open the X11 display running vbox via sudo[solved] |
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Hello, I have a script that run virtualbox as a specific user.
think is that when I try to run it I get the following:
| Code: |
starting virtualbox...
No protocol specified
Failed to open the X11 display!
shutting down virtualbox...
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here is my relevant /etc/sudoers:
| Code: | # sudoers file.
#
# This file MUST be edited with the 'visudo' command as root.
# Failure to use 'visudo' may result in syntax or file permission errors
# that prevent sudo from running.
#
# See the sudoers man page for the details on how to write a sudoers file.
#
# Host alias specification
# User alias specification
# Cmnd alias specification
# Defaults specification
Defaults env_reset
Defaults:%virt_users env_keep = "VIRT_SW VIRT_IMG DISPLAY USER HOME XAUTHORITY"
# Runas alias specification
# User privilege specification
root ALL=(ALL) ALL
# Uncomment to allow people in group wheel to run all commands
# %wheel ALL=(ALL) ALL
# Same thing without a password
# %wheel ALL=(ALL) NOPASSWD: ALL
# Samples
# %users ALL=/sbin/mount /cdrom,/sbin/umount /cdrom
# %users localhost=/sbin/shutdown -h now
%virt_users ALL = (virt_admin) NOPASSWD: /home/virt_admin/exec_vm.sh
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where when I run the command, I run it as follows:
| Code: | #!/bin/bash -x
DIR="$(echo ~virt_admin)"
SCRIPT_NAME="${DIR}/exec_vm.sh"
sudo -u $(stat --printf="%U" ${SCRIPT_NAME}) ${SCRIPT_NAME} |
any ideas why I get that error and how to solve this?
Thanks,
_________________
Only two things are infinite, the universe and human stupidity and I'm not sure about the former - Albert Einstein
Last edited by DaggyStyle on Wed May 29, 2013 12:33 pm; edited 2 times in total |
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Adel Ahmed
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Joined: 21 Sep 2012
Posts: 1523
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DaggyStyle
Watchman
Joined: 22 Mar 2006
Posts: 5909
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| Posted: Tue May 28, 2013 7:56 pm Post subject: |
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Solved! thanks for the tip, here is what I've done:
- added the following lines to exec_vm.sh:
| Code: | X_AUTH_FILE="$(find /var/run/xauth/ -name "A${DISPLAY}-*" -group root)"
X_COOKIE_TOKEN="$(sudo /usr/local/bin/get_X_auth_cookie.sh ${X_AUTH_FILE})" |
also | Code: |
xauth add ${DISPLAY} MIT-MAGIC-COOKIE-1 ${X_COOKIE_TOKEN}
# run cmd
xauth remove ${DISPLAY}
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created /usr/local/bin/get_X_auth_cookie.sh with the following content:
| Code: | #!/bin/bash
AUTHFILE="$1"
echo "$(xauth -f "$AUTHFILE" nlist | cut -d" " -f 9)" |
modified /etc/sudoers to the following:
| Code: | # sudoers file.
#
# This file MUST be edited with the 'visudo' command as root.
# Failure to use 'visudo' may result in syntax or file permission errors
# that prevent sudo from running.
#
# See the sudoers man page for the details on how to write a sudoers file.
#
# Host alias specification
# User alias specification
# Cmnd alias specification
# Defaults specification
Defaults env_reset
Defaults:%virt_users env_keep = "VIRT_SW VIRT_IMG DISPLAY"
# Runas alias specification
# User privilege specification
root ALL=(ALL) ALL
# Uncomment to allow people in group wheel to run all commands
# %wheel ALL=(ALL) ALL
# Same thing without a password
# %wheel ALL=(ALL) NOPASSWD: ALL
# Samples
# %users ALL=/sbin/mount /cdrom,/sbin/umount /cdrom
# %users localhost=/sbin/shutdown -h now
virt_admin ALL = NOPASSWD: /sbin/modprobe, /usr/bin/rc-config, /usr/bin/virsh, /usr/local/bin/get_X_auth_cookie.sh
%virt_users ALL = (virt_admin) NOPASSWD: /home/virt_admin/exec_vm.sh |
and viola, it works 
_________________
Only two things are infinite, the universe and human stupidity and I'm not sure about the former - Albert Einstein |
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