udhcpc - script isn?t called

[Denys Vlasenko]

On Monday 26 May 2008 14:22, Manuel Sahm wrote:
> OK, example:
> 
> 1.) My system is booting - udhcpc is started....what happens if no cable 
> is plugged...I think the udhcp is waiting for an event. ?

No. It will be trying to send discover packets anyway.

> 2.) [cable plugged]What happens if no dhcp server is running and no ip 
> is got ? - Is there a TIMEOUT that you have to wait to get an ip address 
> from a dhcp server  ?

Unless -n or -q is given, udhcpc will try forever.

You need to read help text:

# udhcpc --help
BusyBox v1.10.0 (2008-03-22 15:35:10 CET) multi-call binary

Usage: udhcpc [-Cfbnqtv] [-c CID] [-V VCLS] [-H HOSTNAME] [-i INTERFACE]
        [-p pidfile] [-r IP] [-s script] [-O dhcp-option]...

        -V,--vendorclass=CLASSID        Vendor class identifier
        -i,--interface=INTERFACE        Interface to use (default eth0)
        -H,-h,--hostname=HOSTNAME       Client hostname
        -c,--clientid=CLIENTID  Client identifier
        -C,--clientid-none      Suppress default client identifier
        -p,--pidfile=file       Create pidfile
        -r,--request=IP         IP address to request
        -s,--script=file        Run file at dhcp events (default /usr/share/udhcpc/default.script)
        -t,--retries=N          Send up to N request packets
        -T,--timeout=N          Try to get a lease for N seconds (default 3)
        -A,--tryagain=N         Wait N seconds (default 20) after failure
        -f,--foreground Run in foreground
        -b,--background Background if lease is not immediately obtained
        -S,--syslog     Log to syslog too
        -n,--now        Exit with failure if lease is not immediately obtained
        -q,--quit       Quit after obtaining lease
        -R,--release    Release IP on quit
        -O,--request-option=OPT Request DHCP option OPT from server
        -a,--arping     Use arping to validate offered address

> 3.) If no ip is got from a dhcp server, is it possible to set an static 
> ip address via ifconfig ?

How would you define "no ip is got from a dhcp server"? No ip is obtained
in 1 second? 5 seconds? 500 seconds?
--
vda