kern/168244: [regression] Unable to manually remove permanent ARP entries

[Arnaud Lacombe]

>Number:         168244
>Category:       kern
>Synopsis:       [regression] Unable to manually remove permanent ARP entries
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Wed May 23 02:00:14 UTC 2012
>Closed-Date:
>Last-Modified:
>Originator:     Arnaud Lacombe
>Release:        9-RELEASE
>Organization:
n/a
>Environment:
>Description:
>From 7.1-RELEASE-p13:
# arp -a
? (10.0.0.100) at 00:1b:eb:30:1e:ff on vte0 permanent [ethernet]
# arp -d 10.0.0.100
10.0.0.100 (10.0.0.100) deleted
# arp -a
# <empty>

>From 9.0-RELEASE:

# arp -a
? (172.31.0.1) at 00:00:24:cb:f4:90 on vr0 permanent [ethernet]
# arp -d 172.31.0.1
172.31.0.1 (172.31.0.1) deleted
# echo $?
0
# arp -a
? (172.31.0.1) at 00:00:24:cb:f4:90 on vr0 permanent [ethernet]

If a utility say "deleted" and successfully complete, I expect it to be "deleted" or to return an error.
>How-To-Repeat:
see above.
>Fix:
Restore the behavior of FreeBSD 7.1-RELEASE, as per POLA, thanks.

>Release-Note:
>Audit-Trail:
>Unformatted: