I understand that when you use the -n option to udhcpc, it will quit
if it's not able to immediately get an IP address. What isn't
apparent though, is that if the initial request succeeds, but a
subsquent renew fails to get an IP address, udhcpc will also quit.
For me at least, this was unexpected, since the --help description
only mentions changing the initial behavior and doesn't say anything
about changing renew behavior. The following patch makes things work
like I was expecting. Feel free to ignore this if it's supposed to
work this way. :)
-Justin
--- busybox-1.14.3/networking/udhcp/dhcpc.c Sun Aug 2 18:16:36 2009
+++ busybox-1.14.3-new/networking/udhcp/dhcpc.c Wed Aug 12 16:53:16 2009
@@ -587,6 +587,7 @@ int udhcpc_main(int argc UNUSED_PARAM, c
state = BOUND;
change_listen_mode(LISTEN_NONE);
+ opt &= ~OPT_n; /* JM - don't
quit if a future renew fails */
if (opt & OPT_q) { /* quit after lease */
if (opt & OPT_R) /*
release on quit */
perform_release(requested_ip, server_addr);
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