usr.sbin/ngctl/ngctl.8

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.\" $FreeBSD: src/usr.sbin/ngctl/ngctl.8,v 1.5.2.7 2003/03/11 22:31:29 trhodes Exp $
.\" $DragonFly: src/usr.sbin/ngctl/ngctl.8,v 1.2 2003/06/17 04:29:57 dillon Exp $
.\" $Whistle: ngctl.8,v 1.6 1999/01/20 03:19:44 archie Exp $
.\"
.Dd January 19, 1999
.Dt NGCTL 8
.Os
.Sh NAME
.Nm ngctl
.Nd netgraph control utility
.Sh SYNOPSIS
.Nm
.Op Fl d
.Op Fl f Ar filename
.Op Fl n Ar nodename
.Op Ar command ...
.Sh DESCRIPTION
The
.Nm
utility creates a new netgraph node of type
.Em socket
which can be used to issue netgraph commands.
If no
.Fl f
flag is given, no
command is supplied on the command line, and standard input is a tty,
.Nm
will enter interactive mode.
Otherwise
.Nm
will execute the supplied command(s) and exit immediately.
.Pp
Nodes can be created, removed, joined together, etc.
.Tn ASCII
formatted control messages can be sent to any node if that node
supports binary/ASCII control message conversion.
.Pp
In interactive mode,
.Nm
will display any control messages and data packets received by the socket node.
In the case of control messages, the message arguments are displayed in
.Tn ASCII
form if the originating node supports conversion.
.Pp
The options are as follows:
.Bl -tag -width indent
.It Fl f Ar nodeinfo
Read commands from the named file.
A single dash represents the standard input.
Blank lines and lines starting with a
.Dq #
are ignored.
.It Fl n Ar nodename
Assign
.Em nodename
to the newly created netgraph node.
The default name is
.Em ngctlXXX
where XXX is the process ID number.
.It Fl d
Increase the debugging verbosity level.
.El
.Sh COMMANDS
The currently supported commands in
.Nm
are:
.Pp
.Bd -literal -offset indent -compact
connect    Connects two nodes
debug      Get/set debugging verbosity level
help       Show command summary or get help on a command
list       Show information about all nodes
mkpeer     Create and connect a new node to an existing node
msg        Send an ASCII formatted message to a node
name       Assign a name to a node
read       Read and execute commands from a file
rmhook     Disconnect a node's hook
show       Show information about a node
shutdown   Shutdown a node
status     Get human readable status from a node
types      Show all installed node types
write      Send a data packet down the hook named by "hook".
quit       Exit program
.Ed
.Pp
Some commands have aliases, e.g.,
.Dq ls
is the same as
.Dq list .
The
.Dq help
command displays the available
commands, their usage and aliases, and a brief description.
.Sh EXIT STATUS
.Ex -std
.Sh SEE ALSO
.Xr netgraph 3 ,
.Xr netgraph 4 ,
.Xr nghook 8
.Sh HISTORY
The
.Nm netgraph
system was designed and first implemented at Whistle Communications, Inc. in
a version of
.Fx 2.2
customized for the Whistle InterJet.
.Sh AUTHORS
.An Archie Cobbs Aq archie@whistle.com