[BusyBox] ifup, ifdown applets

[Steven Scholz]

Glenn McGrath wrote:
> 
> Ive just commited those applets based on the debian ifupdown package.

I do not understand the options [ and ] .

Would you mind explaining them to me?

E.g.

        if (!execute("[[ route add default gw %gateway% %iface% ]]", ifd, exec))
{
                return(0);
        }
 in static_up().

Thanks a million,

Steven