udhcpc is disrespecting --retries, unless -n is passed as well
Denys Vlasenko
vda.linux at googlemail.com
Thu Aug 8 10:35:37 UTC 2013
On Thu, Aug 8, 2013 at 10:28 AM, John Spencer
<maillist-busybox at barfooze.de> wrote:
>> The "-t N" option doesn't say how many times to try acquiring
>> the lease before exiting. It says how many discover packets to send.
>>
>>> this is pretty counterintuitive.
>>
>>
>> How would you rephrase the help text to make it clearer?#
>
>
> maybe something like this:
> -t,--retries N Send up to N discover packets (add -n to exit after
> N failures)
I changed --help to read like this:
Usage: udhcpc [-fbqvaoCRB] [-t N] [-T SEC] [-A SEC/-n]
[-i IFACE] [-P PORT] [-r IP] [-s PROG] [-p PIDFILE]
[-V VENDOR] [-x OPT:VAL]... [-O OPT]...
-i,--interface IFACE Interface to use (default eth0)
-p,--pidfile FILE Create pidfile
-s,--script PROG Run PROG at DHCP events (default
/usr/share/udhcpc/default.script)
-B,--broadcast Request broadcast replies
-t,--retries N Send up to N discover packets (default 3)
-T,--timeout SEC Pause between packets (default 3)
-A,--tryagain SEC Wait after failure (default 20)
-n,--now Exit if lease is not obtained
-q,--quit Exit after obtaining lease
-R,--release Release IP on exit
-f,--foreground Run in foreground
-b,--background Background if lease is not obtained
-S,--syslog Log to syslog too
-P,--client-port PORT Use PORT (default 68)
-a,--arping Use arping to validate offered address
-O,--request-option OPT Request option OPT from server (cumulative)
-o,--no-default-options Don't request any options (unless -O is given)
-r,--request IP Request this IP address
-x OPT:VAL Include option OPT in sent packets (cumulative)
Examples of string, numeric, and hex byte opts:
-x hostname:bbox - option 12
-x lease:3600 - option 51 (lease time)
-x 0x3d:0100BEEFC0FFEE - option 61 (client id)
-F,--fqdn NAME Ask server to update DNS mapping for NAME
-V,--vendorclass VENDOR Vendor identifier (default 'udhcp VERSION')
-C,--clientid-none Don't send MAC as client identifier
-v Verbose
Signals:
USR1 Renew lease
USR2 Release lease
the "[-A SEC/-n]" part, hopefully, shows that either retry or exit
after failure can be specified.
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