Here is the behavior on either 14.04 or 16.04:
# dhclient -1 -v virbr0
Internet Systems Consortium DHCP Client 4.2.4
Copyright 2004-2012 Internet Systems Consortium.
All rights reserved.
For info, please visit https://www.isc.org/software/dhcp/
Listening on LPF/virbr0/52:54:00:05:e1:f3
Sending on LPF/virbr0/52:54:00:05:e1:f3
Sending on Socket/fallback
DHCPDISCOVER on virbr0 to 255.255.255.255 port 67 interval 3 (xid=0xe7ef8212)
DHCPDISCOVER on virbr0 to 255.255.255.255 port 67 interval 1 (xid=0xe7ef8212)
No DHCPOFFERS received.
No working leases in persistent database - sleeping.
# ps awxfu|grep dh.*virbr
root 16796 0.0 0.0 8868 792 pts/36 S+ 05:31 0:00 | |
\_ grep dh.*virbr
root 16772 0.0 0.0 10220 4368 ? Ss 05:30 0:00 \_
dhclient -1 -v virbr0
#
Not only does it not return the documented exit code, it also
backgrounds itself and continues polling. So the -1 option seems to be
completely broken.
I've looked at the source package, and this is due to
debian/patches/onetry_retry_after_initial_success. The addition of this
patch isn't documented in the changelog, there are no referenced bugs,
and the patch description doesn't make sense to me; assigning to
stgraber, who is listed as the author of this patch.
** Changed in: isc-dhcp (Ubuntu)
Assignee: (unassigned) => Stéphane Graber (stgraber)
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https://bugs.launchpad.net/bugs/1633619
Title:
dhclient -1 exits 0 when no lease found
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