bin/51437: 'nfsd -u' terminates quietly

[Hauke Fath <hf%spg.tu-darmstadt.de@localhost>]

>Number:         51437
>Category:       bin
>Synopsis:       'nfsd -u' terminates quietly
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    bin-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Mon Aug 22 14:05:00 +0000 2016
>Originator:     Hauke Fath
>Release:        NetBSD 7.0_STABLE
>Organization:
Technische Universitaet Darmstadt
>Environment:
	
	
System: NetBSD Hochstuhl 7.0_STABLE NetBSD 7.0_STABLE (MONOLITHIC) #1: Mon Aug 22 14:49:23 CEST 2016 hf@Hochstuhl:/var/obj/netbsd-builds/7/amd64/sys/arch/amd64/compile/MONOLITHIC amd64
Architecture: x86_64
Machine: amd64
>Description:

	An udp-only nfsd instance, started as '/usr/sbin/nfsd -u',
	will terminate immediately with return value 1, but no other
	disgnostics.

	The man page says this should work.

	The problem showed up after reconfiguring a 2016-04
	installation, and persisted after updating to a netbsd-7 head
	build.

	The output of a 'ktrace -di /usr/sbin/nfsd -u' didn't speak to
	me.

	

>How-To-Repeat:
	

[Set up /etc/exports, run rpcbind and mountd, etc.]

# /usr/sbin/nfsd -u || echo $status
1
# /usr/sbin/nfsd || echo $status
# pgrep nfsd
695
#

>Fix:
	
	Yes, please.

>Unformatted: