2fe8fb192f
There is important information about booting non-ack images in docs/UPDATING. ack/aout-format images can't be built any more, and booting clang/ELF-format ones is a little different. Updating to the new boot monitor is recommended. Changes in this commit: . drop boot monitor -> allowing dropping ack support . facility to copy ELF boot files to /boot so that old boot monitor can still boot fairly easily, see UPDATING . no more ack-format libraries -> single-case libraries . some cleanup of OBJECT_FMT, COMPILER_TYPE, etc cases . drop several ack toolchain commands, but not all support commands (e.g. aal is gone but acksize is not yet). . a few libc files moved to netbsd libc dir . new /bin/date as minix date used code in libc/ . test compile fix . harmonize includes . /usr/lib is no longer special: without ack, /usr/lib plays no kind of special bootstrapping role any more and bootstrapping is done exclusively through packages, so releases depend even less on the state of the machine making them now. . rename nbsd_lib* to lib* . reduce mtree
130 lines
3.7 KiB
Groff
130 lines
3.7 KiB
Groff
.\" $NetBSD: cdbw.3,v 1.3 2010/11/03 16:17:48 plunky Exp $
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.\"
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.\" Copyright (c) 2010 The NetBSD Foundation, Inc.
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.\" All rights reserved.
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.\"
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.\" This code is derived from software contributed to The NetBSD Foundation
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.\" by Joerg Sonnenberger.
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\"
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in
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.\" the documentation and/or other materials provided with the
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.\" distribution.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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.\" ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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.\" LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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.\" FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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.\" COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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.\" INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
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.\" BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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.\" LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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.\" AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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.\" OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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.\" OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.Dd November 3, 2010
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.Dt CDBW 3
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.Os
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.Sh NAME
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.Nm cdbw_open ,
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.Nm cdbw_put ,
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.Nm cdbw_put_data ,
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.Nm cdbw_put_key ,
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.Nm cdbw_close
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.Nd create constant databases
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.Sh SYNOPSIS
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.In archive_entry.h
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.Ft "struct cdbw *"
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.Fn cdbw_open "void"
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.Ft int
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.Fo cdbw_put
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.Fa "struct cdbw *cdbw"
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.Fa "const void *key"
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.Fa "size_t keylen"
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.Fa "const void *data"
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.Fa "size_t datalen"
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.Fc
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.Ft int
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.Fo cdbw_put_data
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.Fa "struct cdbw *cdbw"
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.Fa "const void *data"
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.Fa "size_t datalen"
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.Fa "uint32_t *index"
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.Fc
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.Ft int
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.Fo cdbw_put_key
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.Fa "struct cdbw *cdbw"
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.Fa "const void *key"
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.Fa "size_t keylen"
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.Fa "uint32_t index"
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.Fc
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.Ft int
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.Fo cdbw_output
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.Fa "struct cdbw *cdbw"
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.Fa "int output"
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.Fa "const char descr[16]"
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.Fa "uint32_t (*seedgen)(void)"
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.Fc
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.Ft void
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.Fn cdbw_close "struct cdbw *cdbw"
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.Sh DESCRIPTION
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The
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.Nm cdbw
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functions are used to create a constant databases for use with
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.Xr cdbr 3 .
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Details about the file format, including overhead and limitations,
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can be found in
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.Xr cdb 5 .
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.Pp
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.Fn cdbw_open
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prepares a new
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.Nm cdb
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writer.
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The function returns a handle to pass to the other functions.
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.Pp
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.Fn cdbw_close
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frees all resources associated with the handle.
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.Pp
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.Fn cdbw_put
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adds the given (key,value) pair after checking for a duplicate key.
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.Fn cdbw_put_data
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adds the given value to the writer without adding a key reference.
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The returned index can be used in subsequent calls to
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.Fn cdbw_put_key
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to add one or more keys pointing to this value.
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.Fn cdbw_put_key
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checks for duplicate keys and valid index arguments.
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On success it adds the given key.
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.Pp
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.Fn cdbw_output
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computes the database file and writes it to the given descriptor.
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The function returns an error if the file cannot be written correctly.
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The
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.Fn descr
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parameter provides a human readable description of the database content.
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The
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.Fn seedgen
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parameter can be used to override the default PRNG.
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The function should return a different value for each invokation.
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The bitwise layout of the output depends on the chosen seed.
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.Sh SEE ALSO
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.Xr cdbr 3 ,
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.Xr cdb 5
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.Sh HISTORY
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Support for the
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.Nm cdb
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format first appeared in
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.Nx 6.0 .
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.Sh AUTHORS
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The
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.Nm cdbr
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and
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.Nm cdbw
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functions have been written by
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.An Joerg Sonnenberger Aq joerg@NetBSD.org .
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