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127 lines
2.9 KiB
C
127 lines
2.9 KiB
C
/*-------------------------------------------------------------------------
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*
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* pg_backup_null.c
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*
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* Implementation of an archive that is never saved; it is used by
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* pg_dump to output output a plain text SQL script instead of save
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* a real archive.
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*
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* See the headers to pg_restore for more details.
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*
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* Copyright (c) 2000, Philip Warner
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* Rights are granted to use this software in any way so long
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* as this notice is not removed.
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*
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* The author is not responsible for loss or damages that may
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* result from it's use.
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*
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*
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* IDENTIFICATION
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* $Header: /cvsroot/pgsql/src/bin/pg_dump/pg_backup_null.c,v 1.8 2002/04/24 02:21:04 momjian Exp $
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*
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* Modifications - 09-Jul-2000 - pjw@rhyme.com.au
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*
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* Initial version.
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*
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* Modifications - 04-Jan-2001 - pjw@rhyme.com.au
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*
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* - Check results of IO routines more carefully.
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*
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*
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*-------------------------------------------------------------------------
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*/
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#include "pg_backup.h"
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#include "pg_backup_archiver.h"
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h> /* for dup */
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static int _WriteData(ArchiveHandle *AH, const void *data, int dLen);
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static void _EndData(ArchiveHandle *AH, TocEntry *te);
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static int _WriteByte(ArchiveHandle *AH, const int i);
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static int _WriteBuf(ArchiveHandle *AH, const void *buf, int len);
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static void _CloseArchive(ArchiveHandle *AH);
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static void _PrintTocData(ArchiveHandle *AH, TocEntry *te, RestoreOptions *ropt);
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/*
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* Initializer
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*/
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void
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InitArchiveFmt_Null(ArchiveHandle *AH)
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{
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/* Assuming static functions, this can be copied for each format. */
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AH->WriteDataPtr = _WriteData;
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AH->EndDataPtr = _EndData;
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AH->WriteBytePtr = _WriteByte;
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AH->WriteBufPtr = _WriteBuf;
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AH->ClosePtr = _CloseArchive;
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AH->PrintTocDataPtr = _PrintTocData;
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/*
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* Now prevent reading...
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*/
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if (AH->mode == archModeRead)
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die_horribly(AH, NULL, "this format cannot be read\n");
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}
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/*
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* - Start a new TOC entry
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*/
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/*------
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* Called by dumper via archiver from within a data dump routine
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* As at V1.3, this is only called for COPY FROM dfata, and BLOB data
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*------
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*/
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static int
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_WriteData(ArchiveHandle *AH, const void *data, int dLen)
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{
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/* Just send it to output */
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ahwrite(data, 1, dLen, AH);
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return dLen;
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}
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static void
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_EndData(ArchiveHandle *AH, TocEntry *te)
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{
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ahprintf(AH, "\n\n");
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}
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/*------
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* Called as part of a RestoreArchive call; for the NULL archive, this
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* just sends the data for a given TOC entry to the output.
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*------
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*/
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static void
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_PrintTocData(ArchiveHandle *AH, TocEntry *te, RestoreOptions *ropt)
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{
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if (te->dataDumper)
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{
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AH->currToc = te;
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(*te->dataDumper) ((Archive *) AH, te->oid, te->dataDumperArg);
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AH->currToc = NULL;
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}
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}
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static int
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_WriteByte(ArchiveHandle *AH, const int i)
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{
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/* Don't do anything */
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return 0;
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}
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static int
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_WriteBuf(ArchiveHandle *AH, const void *buf, int len)
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{
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/* Don't do anything */
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return len;
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}
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static void
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_CloseArchive(ArchiveHandle *AH)
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{
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/* Nothing to do */
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}
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