CODEWITHSUNDEEP
bashshell
Pasha
Pasha

Reputation: 13

Shell script syntax error (if, then, else)

I have been trying to make a shell script in bash that will display the following:

You are the super user (When I run the script as root). You are the user: "user" (When I run the script as a user).

#!/bin/bash/
if { whoami | grep "root" }; then
echo $USER1
else
echo $USER2
fi

I keep recieving these syntax error messages:

script.sh: line 2: syntax error near unexpected token `then'
script.sh: line 2: `if { whoami | grep "root" }; then'

Could someone help me out?

Upvotes: 0

Views: 1920

Answers (3)

Alex
Alex

Reputation: 488

pay attention with your first line, the correct syntax for she-bang is:

#!/bin/bash

everything you put there, is the interpreter of your script, you can also put something like #!/usr/bin/python for python scripts, but your question is about the if statement, so you can do this in two ways in shell script using

if [ test ] ; then doSomething(); fi

or

if (( test )) ; then doSomething(); fi

so to answer your question basically you need to do this

#!/bin/bash

if [ `id -u` -eq 0 ] ; then
        echo "you are root sir";
else
        echo "you are a normal user"
fi

if (( "$USER" = "root" )); then
        echo "you are root sir";
else
        echo "you are a normal user"
fi

note that you could use a command using `cmd` or $(cmd) and compare using -eq (equal) or = (same), hope this help you :-)

Upvotes: 0

Aleksander Rezen
Aleksander Rezen

Reputation: 927

 userType="$(whoami)"
 if [ "$userType" = "root" ]; then
    echo "$USER1"
 else
    echo "$USER2"
 fi

Upvotes: 1

Ignacio Vazquez-Abrams
Ignacio Vazquez-Abrams

Reputation: 799420

If braces are used to chain commands then the last command must have a command separator after it.

{ foo ; bar ; }

Upvotes: 2

Related Questions