Problem:
I want to change the timeout of dhclient for embedded Linux that doesn’t have DHCP.
What I did:
I have compiled DHCP from isc.org. I have compiled it with this CFLAGS:
CFLAGS="-D_PATH_DHCLIENT_SCRIPT='\"/sbin/dhclient-script\"' \
-D_PATH_DHCPD_CONF='\"/etc/dhcp/dhcpd.conf\"' \
-D_PATH_DHCLIENT_CONF='\"/ISGv2/configs/dhclient.conf\"'"
In my config file, /ISGv2/configs/dhclient.conf
(which I designated as _PATH_DHCLIENT_CONF in my CFLAGS, shown above),
I have specified a timeout of 3 seconds.
If I execute this command:
dhclient wlan0
It uses a timeout of <something other than 3 seconds>, so it must be reading the "defaults" settings from some other (unknown) config file.
If I execute this command:
dhclient wlan0 -cf /ISGv2/configs/dhclient.conf
it works as expected.
How can I determine what config file it is using by default?
dhclientor did it come from your distribution? – Mikel Aug 25 '17 at 14:52isc-dhcpbefore compilation. So no one can answer that except you. A typical location is/etc/dhcp/dhclient.conf. The option-pfgives a path to a file where it stores the pid, so it's easy for the system to find it later. This file has nothing to do with the config file. – dirkt Aug 25 '17 at 15:13/var/run/dhclient.wlan0.pidor not? If not, delete it from the title. (2) Have you tried usingstraceto see what files it accesses? – Scott Aug 26 '17 at 19:24