BusyBox v1.17.1 (2010-08-25 06:09:53 NOVST) multi-call binary.Usage: udhcpc [-fbnqvoCR] [-i IFACE] [-r IP] [-s PROG] [-p PIDFILE][-H HOSTNAME] [-c CID] [-V VENDOR] [-O DHCP_OPT]...-i,--interface IFACE Interface to use (default eth0)-p,--pidfile FILE Create pidfile-r,--request IP IP address to request-s,--script PROG Run PROG at DHCP events (default /usr/share/udhcpc/default.script)-t,--retries N Send up to N discover packets-T,--timeout N Pause between packets (default 3 seconds)-A,--tryagain N Wait N seconds after failure (default 20)-f,--foreground Run in foreground-b,--background Background if lease is not obtained-S,--syslog Log to syslog too-n,--now Exit if lease is not obtained-q,--quit Exit after obtaining lease-R,--release Release IP on exit-a,--arping Use arping to validate offered address-O,--request-option OPT Request DHCP option OPT (cumulative)-o,--no-default-options Don't request any options (unless -O is given)-x OPT:VAL Include option OPT in sent packets (cumulative)-F,--fqdn NAME Ask server to update DNS mapping for NAME-H,-h,--hostname NAME Send NAME as client hostname (default none)-V,--vendorclass VENDOR Vendor identifier (default 'udhcp VERSION')-c,--clientid CLIENTID Client identifier (default own MAC)-C,--clientid-none Don't send client identifier