.\"
.\" Copyright (c) 1996, 1997 Shigio Yamaguchi. All rights reserved.
.\"
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.\" modification, are permitted provided that the following conditions
.\" are met:
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.\"    documentation and/or other materials provided with the distribution.
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.\"    must display the following acknowledgement:
.\"	This product includes software developed by Shigio Yamaguchi.
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.\"    may be used to endorse or promote products derived from this software
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.Dd Nov 3, 1998
.Dt BTREEOP 1
.Os BSD 4
.Sh NAME
.Nm btreeop
.Nd btree database maintenance tool
.Sh SYNOPSIS
.Nm btreeop
.Op Fl A
.Op Fl C
.Op Fl D[keyno] Ar key
.Op Fl K[keyno] Ar key
.Op Fl L[2]
.Op Fl k Ar prefix
.Op Ar dbname
.Sh DESCRIPTION
.Nm Btreeop
execute simple operations for
.Xr btree 3
database.
.Nm Btreeop
can create database, write record, read record (sequential or indexed) and
delete record from it.
Duplicate entries are allowed.
Multi-key is available but only primary key can use index of
.Xr btree 3 .
.Sh OPTIONS
A capital letter means a command. If no command specified
then it assume sequential read operation.
.Bl -tag -width Ds
.It Fl A
append records. If database doesn't exist, btreeop creates it.
.It Fl C
create database and write records to it.
.It Fl D[keyno] Ar key
delete records by the key. By default, keyno is 0 (primary key).
.It Fl K[keyno] Ar key
search records by the key. By default, keyno is 0 (primary key).
.It Fl L[2]
list all primary keys. If '2' is specified, list all the key and data pairs.
.It Fl k Ar prefix
scan records which have the prefix as a primary key.
This option is valid only with sequential read operation (-L command or non command).
.It Ar dbname
database name. default is 'btree'.
.Sh DATA FORMAT
To creat (or append) database,
.Nm btreeop
read data from stdin.
The format of the data is the following.

  Primary-key  Secondary-key-1  Secondary-key-2  Data
  (keyno = 0)  (keyno = 1)      (keyno = 2)
  --------------------------------------------------------------
  main         246              main.c           main (){\\n
  func         120              library.c        func(a1, a2)\\n
  .
  .
  .

.El

.Bl -enum -offset indent
.It
All key and data are separated by blank('\\t' or ' '). 
.It
Key cannot include blank.
.It
Data can include blank.
.It
Null data not allowed.
.It
Additionally, META record is available. META record has a key that start with
a blank. You can read this record only by indexed read operation (-K option).
Usage is unlimited by btreeop.
.El
.Sh EXAMPLES
Create database.

  % btreeop -C
  key1	data1
  key2	data2
  key3	data3
  ^D
  %

Append records.

  % btreeop -A
   __.VERSION 2
  key2	data2-2
  ^D
  %

Sequential read.

  % btreeop
  key1  data1
  key2  data2-2
  key2  data2
  key3  data3
  %

Indexed read.

  % btreeop -K key2
  key2  data2-2
  key2  data2
  % btreeop -K ' __.VERSION'
   __.VERSION 2
  %

List primary keys.

  % btreeop -L
  key1
  key2
  key3
  %

Delete record.

  % btreeop -D ' __.VERSION'
  % btreeop -K ' __.VERSION'
  %

.Sh FILES
.Bl -tag -width tags -compact
.It Pa btree
default database name.
.El
.Sh DIAGNOSTICS
.Nm Btreeop
exits with a non 0 value if an error occurred, 0 otherwise.
.Sh SEE ALSO
.Xr btree 3
.Sh AUTHOR
Shigio Yamaguchi (shigio@wafu.netgate.net)
.Sh HISTORY
The
.Nm
command appeared in FreeBSD 2.2.2.