1 

     2 function shcmd (cmd)

     3     if not cmd or cmd == "" then return nil, "No command" end

     4 

     5     local fullcmd = cmd.." 2> /dev/null"

     6     local fh = io.popen(fullcmd)

     7     result = fh:read("*a")  -- read cmd output

     8     fh:close()

     9     -- Trim trailing newlines

    10     local r = result:gsub("\n+$", "")

    11     return r

    12 end