Simple lua module to get the path to the temporary directory on the current host (e.g. '/tmp') [https://ideone.com/675UZR]

getTempPath.lua

local function getTempPath()
    local directorySeperator = package.config:match("([^\n]*)\n?")
    local exampleTempFilePath = os.tmpname()
    
    -- remove generated temp file
    pcall(os.remove, exampleTempFilePath)

    local seperatorIdx = exampleTempFilePath:reverse():find(directorySeperator)
    local tempPathStringLength = #exampleTempFilePath - seperatorIdx

    return exampleTempFilePath:sub(1, tempPathStringLength)
end

return getTempPath

Also os.getenv('TEMP')