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NGCTL(8)               DragonFly System Manager's Manual              NGCTL(8)


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 com- mand(s) and exit immediately. Nodes can be created, removed, joined together, etc. ASCII formatted control messages can be sent to any node if that node supports 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 messages, 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 ignored. -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: 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 Some commands have aliases, e.g., ``ls'' is the same as ``list''. The ``help'' command displays the available commands, their usage and aliases, and a brief description.


The ngctl utility exits 0 on success, and >0 if an error occurs.


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


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


Archie Cobbs <archie@whistle.com> DragonFly 3.5 January 19, 1999 DragonFly 3.5

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