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To: "Hartmann, O." <ohartman@zedat.fu-berlin.de>, 
 FreeBSD Current <freebsd-current@freebsd.org>
Subject: Re: r247839: broken pipe - for top, sudo and ports
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On 2013-03-05 20:59, Hartmann, O. wrote:
...
> A "truss top" reveals this, is this of help?
...
> socket(PF_LOCAL,SOCK_STREAM,0)                   = 4 (0x4)
> connect(4,{ AF_UNIX "/var/run/nscd" },15)        = 0 (0x0)
> fcntl(4,F_SETFL,O_NONBLOCK)                      = 0 (0x0)
...
> sendmsg(0x4,0x7fffffffd290,0x0,0x1,0x1,0x0)      ERR#32 'Broken pipe'

Maybe your nscd might have died?  It is successfully opening and
connecting to nscd's unix socket, but gets an EPIPE when it tries to
send data.