mirror/mariadb
1
0
Fork 0
mirror of https://github.com/MariaDB/server.git synced 2025-01-16 20:12:31 +01:00
Code Issues Projects Releases Packages Wiki Activity Actions
mariadb/storage/connect/tabzip.cpp
Mikhail Chalov 19af1890b5 Use memory safe snprintf() in Connect Engine 
This commit replaces sprintf(buf, ...) with
snprintf(buf, sizeof(buf), ...),
specifically in the "easy" cases where buf is allocated with a size
known at compile time.

The changes make sure we are not write outside array/string bounds which
will lead to undefined behaviour. In case the code is trying to write
outside bounds - safe version of functions simply cut the string
messages so we process this gracefully.

All new code of the whole pull request, including one or several files
that are either new files or modified ones, are contributed under the BSD-new
license.  I am contributing on behalf of my employer Amazon Web Services,
Inc.

bsonudf.cpp warnings cleanup by Daniel Black

Reviewer: Daniel Black
2022-07-26 16:28:59 +10:00

251 lines
8.4 KiB
C++
Raw Blame History

/************* TabZip C++ Program Source Code File (.CPP) **************/
/* PROGRAM NAME: TABZIP Version 1.0 */
/* (C) Copyright to the author Olivier BERTRAND 2016 */
/* This program are the TABZIP class DB execution routines. */
/***********************************************************************/
/***********************************************************************/
/* Include relevant sections of the MariaDB header file. */
/***********************************************************************/
#include <my_global.h>
/***********************************************************************/
/* Include application header files: */
/* global.h is header containing all global declarations. */
/* plgdbsem.h is header containing the DB application declarations. */
/* (x)table.h is header containing the TDBASE declarations. */
/* tabzip.h is header containing the TABZIP classes declarations. */
/***********************************************************************/
#include "global.h"
#include "plgdbsem.h"
#include "xtable.h"
#include "filamtxt.h"
#include "filamzip.h"
#include "resource.h" // for IDS_COLUMNS
#include "tabdos.h"
#include "tabmul.h"
#include "tabzip.h"
/* -------------------------- Class ZIPDEF --------------------------- */
/************************************************************************/
/* DefineAM: define specific AM block values. */
/************************************************************************/
bool ZIPDEF::DefineAM(PGLOBAL g, LPCSTR am, int poff)
{
//target = GetStringCatInfo(g, "Target", NULL);
return DOSDEF::DefineAM(g, "ZIP", poff);
} // end of DefineAM
/***********************************************************************/
/* GetTable: makes a new Table Description Block. */
/***********************************************************************/
PTDB ZIPDEF::GetTable(PGLOBAL g, MODE m)
{
PTDB tdbp = NULL;
tdbp = new(g) TDBZIP(this);
if (Multiple)
tdbp = new(g) TDBMUL(tdbp);
return tdbp;
} // end of GetTable
/* ------------------------------------------------------------------- */
/***********************************************************************/
/* Implementation of the TDBZIP class. */
/***********************************************************************/
TDBZIP::TDBZIP(PZIPDEF tdp) : TDBASE(tdp)
{
zipfile = NULL;
zfn = tdp->Fn;
//target = tdp->target;
nexterr = UNZ_OK;
} // end of TDBZIP standard constructor
/***********************************************************************/
/* Allocate ZIP column description block. */
/***********************************************************************/
PCOL TDBZIP::MakeCol(PGLOBAL g, PCOLDEF cdp, PCOL cprec, int n)
{
return new(g) ZIPCOL(cdp, this, cprec, n);
} // end of MakeCol
/***********************************************************************/
/* open a zip file. */
/* param: filename path and the filename of the zip file to open. */
/* return: true if open, false otherwise. */
/***********************************************************************/
bool TDBZIP::open(PGLOBAL g, const char *fn)
{
char filename[_MAX_PATH];
PlugSetPath(filename, fn, GetPath());
if (!zipfile && !(zipfile = unzOpen64(filename)))
snprintf(g->Message, sizeof(g->Message), "Zipfile open error");
return (zipfile == NULL);
} // end of open
/***********************************************************************/
/* Close the zip file. */
/***********************************************************************/
void TDBZIP::close()
{
if (zipfile) {
unzClose(zipfile);
zipfile = NULL;
} // endif zipfile
} // end of close
/***********************************************************************/
/* ZIP Cardinality: returns table size in number of rows. */
/***********************************************************************/
int TDBZIP::Cardinality(PGLOBAL g)
{
if (!g)
return 1;
else if (Cardinal < 0) {
if (!open(g, zfn)) {
unz_global_info64 ginfo;
int err = unzGetGlobalInfo64(zipfile, &ginfo);
Cardinal = (err == UNZ_OK) ? (int)ginfo.number_entry : 0;
} else
Cardinal = 10; // Dummy for multiple tables
} // endif Cardinal
return Cardinal;
} // end of Cardinality
/***********************************************************************/
/* ZIP GetMaxSize: returns file size estimate in number of lines. */
/***********************************************************************/
int TDBZIP::GetMaxSize(PGLOBAL g)
{
if (MaxSize < 0)
MaxSize = Cardinality(g);
return MaxSize;
} // end of GetMaxSize
/***********************************************************************/
/* ZIP Access Method opening routine. */
/***********************************************************************/
bool TDBZIP::OpenDB(PGLOBAL g)
{
if (Use == USE_OPEN)
// Table already open
return false;
Use = USE_OPEN; // To be clean
return open(g, zfn);
} // end of OpenDB
/***********************************************************************/
/* ReadDB: Data Base read routine for ZIP access method. */
/***********************************************************************/
int TDBZIP::ReadDB(PGLOBAL g)
{
if (nexterr == UNZ_END_OF_LIST_OF_FILE)
return RC_EF;
else if (nexterr != UNZ_OK) {
snprintf(g->Message, sizeof(g->Message), "unzGoToNextFile error %d", nexterr);
return RC_FX;
} // endif nexterr
int err = unzGetCurrentFileInfo64(zipfile, &finfo, fn,
sizeof(fn), NULL, 0, NULL, 0);
if (err != UNZ_OK) {
snprintf(g->Message, sizeof(g->Message), "unzGetCurrentFileInfo64 error %d", err);
return RC_FX;
} // endif err
nexterr = unzGoToNextFile(zipfile);
return RC_OK;
} // end of ReadDB
/***********************************************************************/
/* WriteDB: Data Base write routine for ZIP access method. */
/***********************************************************************/
int TDBZIP::WriteDB(PGLOBAL g)
{
strcpy(g->Message, "ZIP tables are read only");
return RC_FX;
} // end of WriteDB
/***********************************************************************/
/* Data Base delete line routine for ZIP access method. */
/***********************************************************************/
int TDBZIP::DeleteDB(PGLOBAL g, int irc)
{
strcpy(g->Message, "Delete not enabled for ZIP tables");
return RC_FX;
} // end of DeleteDB
/***********************************************************************/
/* Data Base close routine for ZIP access method. */
/***********************************************************************/
void TDBZIP::CloseDB(PGLOBAL g)
{
close();
nexterr = UNZ_OK; // For multiple tables
Use = USE_READY; // Just to be clean
} // end of CloseDB
/* ---------------------------- ZIPCOL ------------------------------- */
/***********************************************************************/
/* ZIPCOL public constructor. */
/***********************************************************************/
ZIPCOL::ZIPCOL(PCOLDEF cdp, PTDB tdbp, PCOL cprec, int i, PCSZ am)
: COLBLK(cdp, tdbp, i)
{
if (cprec) {
Next = cprec->GetNext();
cprec->SetNext(this);
} else {
Next = tdbp->GetColumns();
tdbp->SetColumns(this);
} // endif cprec
Tdbz = (TDBZIP*)tdbp;
flag = cdp->GetOffset();
} // end of ZIPCOL constructor
/***********************************************************************/
/* ReadColumn: */
/***********************************************************************/
void ZIPCOL::ReadColumn(PGLOBAL g)
{
switch (flag) {
case 1:
Value->SetValue(Tdbz->finfo.compressed_size);
break;
case 2:
Value->SetValue(Tdbz->finfo.uncompressed_size);
break;
case 3:
Value->SetValue((int)Tdbz->finfo.compression_method);
break;
case 4:
Tdbz->finfo.tmu_date.tm_year -= 1900;
if (((DTVAL*)Value)->MakeTime((tm*)&Tdbz->finfo.tmu_date))
Value->SetNull(true);
Tdbz->finfo.tmu_date.tm_year += 1900;
break;
default:
Value->SetValue_psz((PSZ)Tdbz->fn);
} // endswitch flag
} // end of ReadColumn
/* -------------------------- End of tabzip -------------------------- */
Reference in a new issue View git blame Copy permalink