Error installing devStack [[ -v "$1" ]] -> [conditional binary operator expected]

raahool_16 · 02-10-2016, 08:34 AM

I am trying to install dev-stack in a CentOS VM. When I run the create-stack-user.sh file by the command:

Code:

$ bash devstack/tools/create-stack-user.sh

I am getting the below error:

Code:

/opt/devstack/functions-common: line 162: conditional binary operator expected

On looking at the file, create-stack-user.sh I have seen that it calls an another shell script file "functions-common" and upon looking at the line number from where the error is reported, I found the below function there:

Code:

function isset {
    [[ -v "$1" ]]
}

I tried the same command with echo and same error occurred:

Code:

echo `[[ -v "$1" ]]`
bash: command substitution: line 1: conditional binary operator expected
bash: command substitution: line 1: syntax error near `"$1"'
bash: command substitution: line 1: `[[ -v "$1" ]]'

Please suggest where is it going wrong..!!

rknichols · 02-10-2016, 01:42 PM

What version of CentOS?

The problem is that your shell does not recognize the "-v" operator ("True if the shell variable varname is set (has been assigned a value)"). Mine doesn't, either (bash 4.1.2, CentOS 6.7).

You can try modifying that function this way:

Code:

function isset {
    [[ ${1-is_not_set} != is_not_set ]]
}

But, you may run into other issues with a package designed for a shell that is newer than yours.

raahool_16 · 02-18-2016, 10:09 PM

Quote:

Originally Posted by rknichols

What version of CentOS?

The problem is that your shell does not recognize the "-v" operator ("True if the shell variable varname is set (has been assigned a value)"). Mine doesn't, either (bash 4.1.2, CentOS 6.7).

You can try modifying that function this way:

Code:

function isset {
    [[ ${1-is_not_set} != is_not_set ]]
}

But, you may run into other issues with a package designed for a shell that is newer than yours.

It was CentOS-6.4. Anyways thanks for your response. I will give it a try. In the mean time I shifted to Ubuntu & it worked there.