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I'm asking the user to input some data using Read that data will be save on a variable that is going to be use in another shell script. However, for some reason is not working.

This is what I got in shell script1.sh

#!/bin/bash
read -p "Enter Your Full Name: " Name
export Name
sudo bash script2.sh

Script2.sh

#!/bin/bash
echo $Name

My understanding was that if I run sudo bash script1.sh is going to take the input and make it in a variable and using export I can export this to another script.

BTW I'm using Bash Version 4.3.11

Can anyone explain me what I'm doing wrong ? My goal is to ask the user their full name and in another script use their full name.

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  • 1
    What you're doing wrong is you're calling a suid executable - one designed to pass on its own elevated privileges - with unsanitized arbitrary user-provided environment. sudo sanitizes environment by default - thankfully - but what you're doing is a deadly sin. 700 hail mary's and 400 our father's. Commented Dec 8, 2014 at 7:24

1 Answer 1

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3

No Sudo Option

You can use the source command to run another bash script in the same environment you came from. (Without launching a subprocess)

Script1.sh

#!/bin/bash
read -p "Enter Your Full Name: " Name
source script2.sh

Script2.sh

#!/bin/bash
echo $Name

--

With Sudo

The reason your example doesn't work is because of the sudo. You can use Sudo -E option to keep the enviroment variables with the super user environment.

Script1.sh

   #!/bin/bash
   read -p "Enter Your Full Name: " Name
   export Name 
   sudo -E bash script2.sh

Script2.sh

#!/bin/bash
echo $Name
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1
  • Alternatively, if you are writing both scripts yourself, why not pass the variable as part of the parameter? Commented Dec 8, 2014 at 6:12

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