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jdbdump(8)
NAME
  jdbdump - Dumps fields from the DHCP dynamic databases.

SYNOPSIS
  /usr/sbin/jdbdump [-a] [-c] [-e] [-f character] [-k key] [-s date] tag...

OPTIONS
  -a  Dumps dates in a readable form.  The default is to dump all date-time
      fields as UCT (seconds since GMT 1/1/70 00:00).

  -c  Display currently active leases only.

  -e  Display expired leases only.

  -f character
      Uses character as the field separator.  The default is the pipe (|)
      character.

  -k key
      Requests that a specific record with the given key be dumped.  The key
      has three fields: the client's hardware type, hardware address, and IP
      address of its subnet.  These three components should be separated by
      whitespace and enclosed within quotes (otherwise the shell will create
      multiple words).

  -s date
      Dumps records timestamped since date.  The default is to dump all the
      records regardless of the date of last modification.

DESCRIPTION
  The jdbdump command reads the databases used by the joind daemon to store
  information on client IP address leases and dynamic names and prints
  selected fields.  Each record is terminated by a newline, and the fields
  within each record delimited by default with the pipe (|) character,
  although this may be changed with the -f command line option. Date fields
  are displayed in Universal Coordinated Time (UCT), seconds since 00:00
  01/01/1970 GMT, unless the -a option is given, which alters the format to a
  more readable form.

  The following fields are always dumped:

  Client id
      This is the identifier which uniquely identifies the client.  It may be
      the client's MAC address or an opaque object, uninterpreted by the JOIN
      software.

  Client id type
      If nonzero, then the client id is the MAC address of the client
      corresponding to this type.  If zero, then the client id may be any
      byte array which serves to uniquely identify the client.

  Client id length
      The length of the identifier in 8-bit bytes. Note that if the client id
      corresponds to a MAC address then this field is redundant. But in the
      more general case, it may be needed in order to determine whether the
      client id is to be interpreted as a literal or as a decimal or
      hexadecimal encoding of a byte string.  Resolving this ambiguity
      becomes important when a file produced by jdbdump has to be reloaded
      into the database by jdbmod.

  Client IP
      The IP address assigned to the client.  If this value is null or
      0.0.0.0 it means "none". The presence of this value does not
      necessarily mean that the client is actually at this address.  Even
      when the lease is unexpired, clients may hold valid leases on addresses
      for more than one network. If the client has assignments on n different
      networks, then jdbdump will generally dump n different records for that
      one client.

  Lease start
      The time at which this lease began.

  Lease expiration
      The time at which this lease will expire.

  Lease renewal
      The time at which this lease may be renewed. Requests to renew the
      lease prior to this will be answered by a reply determined by the
      residual time remaining on the lease until expiration. After this time
      has passed, the client will receive an entirely new lease whose
      duration is determined by the bootptab database.

  Last renewal
      Time when client last acquired or renewed this lease.

  Server IP
      IP address of server "owning" the lease.

  Hostname
      The client's name (without the domain name).

  Domain
      The client's domain (without the leaf name). If a client's fully
      qualified domain name were a.b.c.d, the hostname field would contain a
      and the domain field would contain b.c.d.

  tag item
      These fields are any fields given by the command line tag arguments.
      These tags identify DHCP configuration parameters.  They may be
      numeric, a two character symbol, or the parameter's long name.  See
      RFC2132 for the numerical values or see bootptab(4) for the symbolic or
      long names.  Note that the values dumped are those that the client
      would have were it to occupy this IP address. It does not necessarily
      mean that the client is presently operating with those values.

  Following these fields are any fields given by the command line "tag"
  arguments. These tags identify DHCP configuration parameters. They may be
  numeric, a two character symbol, or the parameter's long name.  Consult
  RFC1533 for the numerical values or see bootptab(4) for the symbolic or
  long names.

FILES
  /var/join/*.hsh

  /var/join/*.btr

SEE ALSO
  Commands: jdbmod(8), joind(8)

  Files: bootptab(4)

Index for Section 8

Alphabetical listing for J

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