GLib.shell_quote

function shell_quote(unquoted_string: String): String {
    // Gjs wrapper for g_shell_quote()
}
  

Quotes a string so that the shell (/bin/sh) will interpret the quoted string to mean unquoted_string. If you pass a filename to the shell, for example, you should first quote it with this function. The return value must be freed with GLib.free. The quoting style used is undefined (single or double quotes may be used).