Bash Script run as root but know what user executed script

[harveyd]

Hi,

I have a bash script that need to be run as sudo because it needs to edit system files. This is fine I execute:-

sudo ./script

Obviously if the script contained:-

theuser=`id -u`
echo $theuser
echo $USER

It would return:-

0
root

But lets say I'm logged in as the user 'admin' with ID '1000' and i run:-

sudo ./script

How can I get the script to know what the originating user was and somehow assign admin's details to variables in the script to be used later on.

e.g. I want to edit /etc/ssh/sshd_config and add a line AllowUser with the current logged in user. I want the line to read:-

AllowUser admin

But the script would have to run as root to be able to edit the file.

Hope this makes sense.

Cheers

Harv

[alf55]

Hi,

I have a bash script that need to be run as sudo because it needs to edit system files. This is fine I execute:-

sudo ./script

Obviously if the script contained:-

theuser=`id -u`
echo $theuser
echo $USER

It would return:-

0
root

But lets say I'm logged in as the user 'admin' with ID '1000' and i run:-

sudo ./script

How can I get the script to know what the originating user was and somehow assign admin's details to variables in the script to be used later on.

e.g. I want to edit /etc/ssh/sshd_config and add a line AllowUser with the current logged in user. I want the line to read:-

AllowUser admin

But the script would have to run as root to be able to edit the file.

Hope this makes sense.

Cheers

Harv

Take a look at the command "who am i" (not "whoami").

[atreyu]

I would have said "echo $SUDO_UID" but that 'who am i' is cool!

[harveyd]

They both sound great, I will give them a go, thanks!

[harveyd]

atreyu: yours does closer to what I want it to do.

Thanks to both!