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NGCTL(8)                FreeBSD 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

     -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

     Archie Cobbs <>

FreeBSD 4.10                   January 19, 1999                   FreeBSD 4.10


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