Posts Tagged ‘if’

Ternary operator for bash scripting.

January 13th, 2012 2 comments

I was curious whether or not ternary operations are possible in bash or not. It turns out they are but only for numeric comparisons. So what if you wanted to compare whether a string is empty if you cannot use a string comparison (-Z or -n for example)? Use the string’s length.

As always with Linux, there’s a plethora of ways to do what I am doing below, so this is just an example for your reference:

function check_mounted () {
    local result=`df | grep $1`
    echo $((${#result} > 0 ? 1 : 0))
Categories: All, Linux