>Number:         11354
>Category:       kern
>Synopsis:       Incompatible change for SIOCGIFCONF (c.f. PR#10968)
>Confidential:   no
>Severity:       non-critical
>Priority:       medium
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Tue Oct 31 20:18:00 PST 2000
>Closed-Date:
>Last-Modified:
>Originator:     Takuya SHIOZAKI
>Release:        1.5H
>Organization:
>Environment:
NetBSD aoi.astec.co.jp 1.5H NetBSD 1.5H (AOI) #0: Tue Oct 31 19:06:23 JST 2000     tshiozak@aoi.astec.co.jp:/usr/src/sys/arch/i386/compile/AOI i386

>Description:
The change in sys/net/if.c:1.70 makes SIOCGIFCONF incompatible from
the previous versions of it.
Some applications assume the returning length to be actual bytes filled
in the buffer.

>How-To-Repeat:
CVSup for FreeBSD causes runtime error under the 1.5H kernel configured with over-11 network interfaces :-)

>Fix:
1. bring back to the previous behaviour, or
2. at least assign a new ioctl number for the new one, and stay
   the previous one. Additionally, COMPAT_FREEBSD use the latter.
>Release-Note:
>Audit-Trail:
>Unformatted: