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Overview
Comment:Fix a bug that can cause a segfault on win32 systems following an I/O error. (CVS 4565)
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SHA1: eeec8d27c4533f62b4f7e739d9c895552ddb69ff
User & Date: drh 2007-11-27 16:55:08
Context
2007-11-27
17:12
Version 3.5.3 (CVS 4566) check-in: a39007d5 user: drh tags: trunk
16:55
Fix a bug that can cause a segfault on win32 systems following an I/O error. (CVS 4565) check-in: eeec8d27 user: drh tags: trunk
14:50
Bug fix in the configure script. Ticket #2799. The configure script is a real mess and needs to be completely rewritten. (CVS 4564) check-in: 9d15f033 user: drh tags: trunk
Changes
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Changes to src/pager.c.

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** The pager is used to access a database disk file.  It implements
** atomic commit and rollback through the use of a journal file that
** is separate from the database file.  The pager also implements file
** locking to prevent two processes from writing the same database
** file simultaneously, or one process from reading the database while
** another is writing.
**
** @(#) $Id: pager.c,v 1.394 2007/11/05 15:30:13 danielk1977 Exp $
*/
#ifndef SQLITE_OMIT_DISKIO
#include "sqliteInt.h"
#include <assert.h>
#include <string.h>

/*
................................................................................
** If the current size of the database file is 0 but a journal file
** exists, that is probably an old journal left over from a prior
** database with the same name.  Just delete the journal.
*/
static int hasHotJournal(Pager *pPager){
  sqlite3_vfs *pVfs = pPager->pVfs;
  if( !pPager->useJournal ) return 0;

  if( !sqlite3OsAccess(pVfs, pPager->zJournal, SQLITE_ACCESS_EXISTS) ){
    return 0;
  }
  if( sqlite3OsCheckReservedLock(pPager->fd) ){
    return 0;
  }
  if( sqlite3PagerPagecount(pPager)==0 ){







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** The pager is used to access a database disk file.  It implements
** atomic commit and rollback through the use of a journal file that
** is separate from the database file.  The pager also implements file
** locking to prevent two processes from writing the same database
** file simultaneously, or one process from reading the database while
** another is writing.
**
** @(#) $Id: pager.c,v 1.395 2007/11/27 16:55:08 drh Exp $
*/
#ifndef SQLITE_OMIT_DISKIO
#include "sqliteInt.h"
#include <assert.h>
#include <string.h>

/*
................................................................................
** If the current size of the database file is 0 but a journal file
** exists, that is probably an old journal left over from a prior
** database with the same name.  Just delete the journal.
*/
static int hasHotJournal(Pager *pPager){
  sqlite3_vfs *pVfs = pPager->pVfs;
  if( !pPager->useJournal ) return 0;
  if( !pPager->fd->pMethods ) return 0;
  if( !sqlite3OsAccess(pVfs, pPager->zJournal, SQLITE_ACCESS_EXISTS) ){
    return 0;
  }
  if( sqlite3OsCheckReservedLock(pPager->fd) ){
    return 0;
  }
  if( sqlite3PagerPagecount(pPager)==0 ){