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SOCKSTAT(1) NetBSD General Commands Manual SOCKSTAT(1)
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by Kimmo Suominen.
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sockstat -- list open sockets
sockstat [-46clnu] [-f address_family] [-p ports]
The sockstat command lists open Internet or UNIX domain sockets.
The following options are available:
-4 Show AF_INET (IPv4) sockets.
-6 Show AF_INET6 (IPv6) sockets.
-c Show connected sockets.
Limit listed sockets to those of the specified
address_family. The following address families are recog-
nized: inet, for AF_INET; inet6, for AF_INET6; and local or
unix, for AF_LOCAL.
-l Show listening sockets.
-n Numeric output only. No attempt will be made to look up sym-
bolic names for addresses and ports.
-p ports Only show Internet sockets if either the local or foreign
port number is on the specified list. The ports argument is
a comma-separated list of port numbers and ranges specified
as first and last port separated by a dash.
-u Show AF_LOCAL (UNIX) sockets.
If neither -4, -6, nor -u are specified, sockstat will list sockets in
all three domains.
If neither -c nor -l are specified, sockstat will list both listening and
connected sockets, as well as those sockets that are in neither state.
The information listed for each socket is:
USER The user who owns the socket.
COMMAND The command which holds the socket.
PID The process ID of the command which holds the socket.
FD The file descriptor number of the socket.
PROTO The transport protocol associated with the socket for
Internet sockets, or the type of socket (stream, seq-
packet or datagram) for UNIX sockets.
LOCAL ADDRESS For Internet sockets, this is the address to which the
local end of the socket is bound (see getsockname(2)).
For bound UNIX sockets, it is the socket's filename or
FOREIGN ADDRESS The address to which the foreign end of the socket is
bound (see getpeername(2)) or ``-'' for unconnected UNIX
fstat(1), netstat(1), inet(4), inet6(4), unix(4)
The sockstat command appeared in FreeBSD 3.1. It was then rewritten for
This version of the sockstat command was written by Andrew Brown
<atatat@NetBSD.org>. This manual page was written by Dag-Erling Smørgrav
<des@FreeBSD.org> and was adapted to match the NetBSD implementation by
Andrew Brown <atatat@NetBSD.org>.
NetBSD 9.3 July 14, 2006 NetBSD 9.3