ngctl - netgraph control utility


ngctl [-d] [-f filename] [-n nodename] [command ...]


The ngctl utility creates a new netgraph node of type socket
which can be
used to issue netgraph commands. If no -f flag is given, no
command is
supplied on the command line, and standard input is a tty,
ngctl will
enter interactive mode. Otherwise ngctl will execute the
supplied command(s) and exit immediately.
Nodes can be created, removed, joined together, etc. ASCII
control messages can be sent to any node if that node sup
binary/ASCII control message conversion.
In interactive mode, ngctl will display any control messages
and data
packets received by the socket node. In the case of control
the message arguments are displayed in ASCII form if the
originating node
supports conversion.
The options are as follows:
-f nodeinfo
Read commands from the named file. A single dash
represents the
standard input. Blank lines and lines starting with
a ``#'' are
-n nodename
Assign nodename to the newly created netgraph node.
The default
name is ngctlXXX where XXX is the process ID number.
-d Increase the debugging verbosity level.


The currently supported commands in ngctl are:
config get or set configuration of node at <path>
connect Connects hook <peerhook> of the node at
<relpath> to <hook>
debug Get/set debugging verbosity level
dot Produce a GraphViz (.dot) of the entire
help Show command summary or get more help on a
specific command
list Show information about all nodes
mkpeer Create and connect a new node to the node
at "path"
msg Send a netgraph control message to the node
at "path"
name Assign name <name> to the node at <path>
read Read and execute commands from a file
rmhook Disconnect hook "hook" of the node at
show Show information about the node at <path>
shutdown Shutdown the node at <path>
status Get human readable status information from
the node at <path>
types Show information about all installed node
write Send a data packet down the hook named by
quit Exit program
Some commands have aliases, e.g., ``ls'' is the same as
``list''. The
``help'' command displays the available commands, their us
age and
aliases, and a brief description.


netgraph(3), netgraph(4), nghook(8)


The netgraph system was designed and first implemented at
Whistle Communications, Inc. in a version of FreeBSD 2.2 customized for
the Whistle


Archie Cobbs <>
BSD January 19, 1999
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