Run a quick test for access to "sudo"

root-test.sh

#!/usr/bin/env bash
#>------------------------------------------------------------------------------
#>
#> [ root-test ]
#>
#>    Run a quick test for access to "sudo"
#>
#>    No inputs are required when invoking this function. Outputs are printed
#>    to STDOUT as either "PASS" or "FAIL" and corresponding exit codes are
#>    emitted.
#>
#> USAGE:
#>
#>    ./root-test <OPTION>
#>
#>    where "OPTION" is an optional input; and where "OPTION" is one of the
#>    following:
#>
#>                 |
#>    -h, --help   | Print this help text to the terminal
#>                 |
#>    -s, --silent | Suppress verbosity messages (only exit codes are emitted)
#>                 |
#>
#> ATTRIBUTION:
#>
#>    Created on 20201031 by h8rt3rmin8r ([email protected])
#>
#>    Source:
#>    https://gist.github.com/h8rt3rmin8r/1c66c2f543c1572745978afa40365e8e
#>
#>------------------------------------------------------------------------------

function _help() {
    cat "${0}" \
        | grep -E '^#[>]' \
        | sed 's/^..//'
    
    return $?
}

output="/dev/stderr"

case "${1//[-]}" in
    h|H|help)
        _help

        exit $?
        ;;
    s|S|silent)
        output="/dev/null"
        ;;
esac

if (( $EUID != 0 )); then
    echo "FAIL" &>${output}

    exit 1
else
    echo "PASS" &>${output}

    exit 0
fi