SQLite

** 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 1.500 2008/10/29 07:01:57 danielk1977 Exp $
*/
#ifndef SQLITE_OMIT_DISKIO
#include "sqliteInt.h"

/*
** Macros for troubleshooting.  Normally turned off
*/

        if( rc==SQLITE_OK ){
          if( res ){
            int fout = 0;
            int f = SQLITE_OPEN_READWRITE|SQLITE_OPEN_MAIN_JOURNAL;
            assert( !pPager->tempFile );
            rc = sqlite3OsOpen(pVfs, pPager->zJournal, pPager->jfd, f, &fout);
            assert( rc!=SQLITE_OK || pPager->jfd->pMethods );
            if( rc==SQLITE_OK && fout&SQLITE_OPEN_READONLY ){
              rc = SQLITE_CANTOPEN;
              sqlite3OsClose(pPager->jfd);
            }
          }else{
            /* If the journal does not exist, that means some other process
            ** has already rolled it back */
            rc = SQLITE_BUSY;
          }
        }
      }
      if( rc!=SQLITE_OK ){





        goto failed;
      }
      pPager->journalOpen = 1;
      pPager->journalStarted = 0;
      pPager->journalOff = 0;
      pPager->setMaster = 0;
      pPager->journalHdr = 0;

# 2008 October 29
#
# The author disclaims copyright to this source code.  In place of
# a legal notice, here is a blessing:
#
#    May you do good and not evil.
#    May you find forgiveness for yourself and forgive others.
#    May you share freely, never taking more than you give.
#
#***********************************************************************
# This file implements regression tests for SQLite library.
#
# $Id: tkt3457.test,v 1.1 2008/10/29 07:01:57 danielk1977 Exp $

set testdir [file dirname $argv0]
source $testdir/tester.tcl

if {$tcl_platform(platform) != "unix"} {
  finish_test
  return
}

#-----------------------------------------------------------------------
# To roll back a hot-journal file, the application needs read and write 
# permission on the journal file in question. The following tests test
# the outcome of trying to rollback a hot-journal file when this is not
# the case.
# 
#   tkt3457-1.2: Application has neither read, nor write permission on
#                the hot-journal file. Result: SQLITE_CANTOPEN.
#                
#   tkt3457-1.3: Application has write but not read permission on
#                the hot-journal file. Result: SQLITE_CANTOPEN.
#
#   tkt3457-1.4: Application has read but not write permission on
#                the hot-journal file. Result: SQLITE_CANTOPEN.
#
#   tkt3457-1.5: Application has read/write permission on the hot-journal 
#                file. Result: SQLITE_OK.
# 
do_test tkt3457-1.1 {
  execsql {
    CREATE TABLE t1(a, b, c);
    INSERT INTO t1 VALUES(1, 2, 3);
    BEGIN;
    INSERT INTO t1 VALUES(4, 5, 6);
  }

  file copy -force test.db bak.db
  file copy -force test.db-journal bak.db-journal

  execsql COMMIT
} {}

do_test tkt3457-1.2 {
  file copy -force bak.db-journal test.db-journal
  file attributes test.db-journal -permissions ---------
  catchsql { SELECT * FROM t1 }
} {1 {unable to open database file}}
do_test tkt3457-1.3 {
  file copy -force bak.db-journal test.db-journal
  file attributes test.db-journal -permissions -w--w--w-
  catchsql { SELECT * FROM t1 }
} {1 {unable to open database file}}
do_test tkt3457-1.4 {
  file copy -force bak.db-journal test.db-journal
  file attributes test.db-journal -permissions r--r--r--
  catchsql { SELECT * FROM t1 }
} {1 {unable to open database file}}

do_test tkt3457-1.5 {
  file copy -force bak.db-journal test.db-journal
  file attributes test.db-journal -permissions rw-rw-rw-
  catchsql { SELECT * FROM t1 }
} {0 {1 2 3 4 5 6}}

finish_test