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Overview
Comment:Added support for SQLITE_ENABLE_PERSIST_WAL compile time macro, retrieving lastErrno from WAL file and setting last errno when writes fail due to space constraints
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Timelines: family | ancestors | descendants | both | apple-osx
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SHA1:654792941011c96db879f6b779e99b1c65c587af
User & Date: adam 2012-05-09 22:36:25
Context
2012-05-10
12:09
Merge in the legacy table constraint parsing fixes from trunk. check-in: e8770283 user: drh tags: apple-osx
2012-05-09
22:36
Added support for SQLITE_ENABLE_PERSIST_WAL compile time macro, retrieving lastErrno from WAL file and setting last errno when writes fail due to space constraints check-in: 65479294 user: adam tags: apple-osx
2012-05-05
01:03
Merge the latest trunk changes into the apple-osx branch. check-in: 2a99c007 user: drh tags: apple-osx
Changes
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Changes to Makefile.in.

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# The library that programs using readline() must link against.
#
LIBREADLINE = @TARGET_READLINE_LIBS@

# Should the database engine be compiled threadsafe
#
TCC += -DSQLITE_THREADSAFE=@SQLITE_THREADSAFE@

# Any target libraries which libsqlite must be linked against
# 
TLIBS = @LIBS@

# Flags controlling use of the in memory btree implementation
#
................................................................................
# This is the command to use for tclsh - normally just "tclsh", but we may
# know the specific version we want to use
#
TCLSH_CMD = @TCLSH_CMD@

# Where do we want to install the tcl plugin
#
TCLLIBDIR = @TCLLIBDIR@

# The suffix used on shared libraries.  Ex:  ".dll", ".so", ".dylib"
#
SHLIB_SUFFIX = @TCL_SHLIB_SUFFIX@

# If gcov support was enabled by the configure script, add the appropriate
# flags here.  It's not always as easy as just having the user add the right
................................................................................
libsqlite3.la:	$(LIBOBJ)
	$(LTLINK) -o $@ $(LIBOBJ) $(TLIBS) \
		${ALLOWRELEASE} -rpath "$(libdir)" -version-info "8:6:8"

libtclsqlite3.la:	tclsqlite.lo libsqlite3.la
	$(LTLINK) -o $@ tclsqlite.lo \
		libsqlite3.la @TCL_STUB_LIB_SPEC@ $(TLIBS) \
		-rpath "$(TCLLIBDIR)" \
		-version-info "8:6:8" \
		-avoid-version

sqlite3$(TEXE):	$(TOP)/src/shell.c libsqlite3.la sqlite3.h
	$(LTLINK) $(READLINE_FLAGS) \
		-o $@ $(TOP)/src/shell.c libsqlite3.la \
		$(LIBREADLINE) $(TLIBS) -rpath "$(libdir)"

# This target creates a directory named "tsrc" and fills it with
................................................................................
	$(INSTALL) -d $(DESTDIR)$(includedir)
	$(INSTALL) -m 0644 sqlite3.h $(DESTDIR)$(includedir)
	$(INSTALL) -m 0644 $(TOP)/src/sqlite3ext.h $(DESTDIR)$(includedir)
	$(INSTALL) -d $(DESTDIR)$(pkgconfigdir)
	$(INSTALL) -m 0644 sqlite3.pc $(DESTDIR)$(pkgconfigdir)

pkgIndex.tcl:
	echo 'package ifneeded sqlite3 $(RELEASE) [list load $(TCLLIBDIR)/libtclsqlite3.so sqlite3]' > $@
tcl_install:	lib_install libtclsqlite3.la pkgIndex.tcl
	$(INSTALL) -d $(DESTDIR)$(TCLLIBDIR)
	$(LTINSTALL) libtclsqlite3.la $(DESTDIR)$(TCLLIBDIR)
	rm -f $(DESTDIR)$(TCLLIBDIR)/libtclsqlite3.la $(DESTDIR)$(TCLLIBDIR)/libtclsqlite3.a
	$(INSTALL) -m 0644 pkgIndex.tcl $(DESTDIR)$(TCLLIBDIR)

clean:	
	rm -f *.lo *.la *.o sqlite3$(TEXE) libsqlite3.la
	rm -f sqlite3.h opcodes.*
	rm -rf .libs .deps
	rm -f lemon$(BEXE) lempar.c parse.* sqlite*.tar.gz
	rm -f mkkeywordhash$(BEXE) keywordhash.h







|







 







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# The library that programs using readline() must link against.
#
LIBREADLINE = @TARGET_READLINE_LIBS@

# Should the database engine be compiled threadsafe
#
#TCC += -DSQLITE_THREADSAFE=@SQLITE_THREADSAFE@

# Any target libraries which libsqlite must be linked against
# 
TLIBS = @LIBS@

# Flags controlling use of the in memory btree implementation
#
................................................................................
# This is the command to use for tclsh - normally just "tclsh", but we may
# know the specific version we want to use
#
TCLSH_CMD = @TCLSH_CMD@

# Where do we want to install the tcl plugin
#
TCLLIBDIR = /System/Library/Tcl

# The suffix used on shared libraries.  Ex:  ".dll", ".so", ".dylib"
#
SHLIB_SUFFIX = @TCL_SHLIB_SUFFIX@

# If gcov support was enabled by the configure script, add the appropriate
# flags here.  It's not always as easy as just having the user add the right
................................................................................
libsqlite3.la:	$(LIBOBJ)
	$(LTLINK) -o $@ $(LIBOBJ) $(TLIBS) \
		${ALLOWRELEASE} -rpath "$(libdir)" -version-info "8:6:8"

libtclsqlite3.la:	tclsqlite.lo libsqlite3.la
	$(LTLINK) -o $@ tclsqlite.lo \
		libsqlite3.la @TCL_STUB_LIB_SPEC@ $(TLIBS) \
                -rpath "$(TCLLIBDIR)/sqlite3" \
		-version-info "8:6:8"


sqlite3$(TEXE):	$(TOP)/src/shell.c libsqlite3.la sqlite3.h
	$(LTLINK) $(READLINE_FLAGS) \
		-o $@ $(TOP)/src/shell.c libsqlite3.la \
		$(LIBREADLINE) $(TLIBS) -rpath "$(libdir)"

# This target creates a directory named "tsrc" and fills it with
................................................................................
	$(INSTALL) -d $(DESTDIR)$(includedir)
	$(INSTALL) -m 0644 sqlite3.h $(DESTDIR)$(includedir)
	$(INSTALL) -m 0644 $(TOP)/src/sqlite3ext.h $(DESTDIR)$(includedir)
	$(INSTALL) -d $(DESTDIR)$(pkgconfigdir)
	$(INSTALL) -m 0644 sqlite3.pc $(DESTDIR)$(pkgconfigdir)

pkgIndex.tcl:
	echo 'package ifneeded sqlite3 $(RELEASE) [list load [file join \$dir libtclsqlite3.so] Tclsqlite3]' > $@
tcl_install:	lib_install libtclsqlite3.la pkgIndex.tcl
	$(INSTALL) -d $(DESTDIR)$(TCLLIBDIR)/sqlite3
	$(LTINSTALL) libtclsqlite3.la $(DESTDIR)$(TCLLIBDIR)/sqlite3
	rm -f $(DESTDIR)$(TCLLIBDIR)/sqlite3/libtclsqlite3.la $(DESTDIR)$(TCLLIBDIR)/sqlite3/libtclsqlite3.a
	$(INSTALL) -m 0644 pkgIndex.tcl $(DESTDIR)$(TCLLIBDIR)/sqlite3

clean:	
	rm -f *.lo *.la *.o sqlite3$(TEXE) libsqlite3.la
	rm -f sqlite3.h opcodes.*
	rm -rf .libs .deps
	rm -f lemon$(BEXE) lempar.c parse.* sqlite*.tar.gz
	rm -f mkkeywordhash$(BEXE) keywordhash.h

Changes to src/main.c.

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    fd = sqlite3PagerFile(pPager);
    assert( fd!=0 );
    if( op==SQLITE_FCNTL_FILE_POINTER ){
      *(sqlite3_file**)pArg = fd;
      rc = SQLITE_OK;
    }else if( fd->pMethods ){
      rc = sqlite3OsFileControl(fd, op, pArg);








    }else{
      rc = SQLITE_NOTFOUND;
    }
    sqlite3BtreeLeave(pBtree);
  }
  sqlite3_mutex_leave(db->mutex);
  return rc;   







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    fd = sqlite3PagerFile(pPager);
    assert( fd!=0 );
    if( op==SQLITE_FCNTL_FILE_POINTER ){
      *(sqlite3_file**)pArg = fd;
      rc = SQLITE_OK;
    }else if( fd->pMethods ){
      rc = sqlite3OsFileControl(fd, op, pArg);
#ifndef SQLITE_OMIT_WAL
      if( (op==SQLITE_FCNTL_LAST_ERRNO)&&(*(int *)pArg==0) ){
        sqlite3_file *pWalFd = sqlite3PagerWalFile(pPager);
        if( pWalFd&&(pWalFd->pMethods) ){
          rc = sqlite3OsFileControl(pWalFd, op, pArg);
        }
      }
#endif
    }else{
      rc = SQLITE_NOTFOUND;
    }
    sqlite3BtreeLeave(pBtree);
  }
  sqlite3_mutex_leave(db->mutex);
  return rc;   

Changes to src/os_unix.c.

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  unsigned short int ctrlFlags;       /* Behavioral bits.  UNIXFILE_* flags */
  int lastErrno;                      /* The unix errno from last I/O error */
  void *lockingContext;               /* Locking style specific state */
  UnixUnusedFd *pUnused;              /* Pre-allocated UnixUnusedFd */
  const char *zPath;                  /* Name of the file */
  unixShm *pShm;                      /* Shared memory segment information */
  int szChunk;                        /* Configured by FCNTL_CHUNK_SIZE */
#if SQLITE_ENABLE_LOCKING_STYLE
  int openFlags;                      /* The flags specified at open() */
#endif
#if SQLITE_ENABLE_DATA_PROTECTION
  int protFlags;                      /* Data protection flags from unixOpen */
#endif
#if SQLITE_ENABLE_LOCKING_STYLE || defined(__APPLE__)
  unsigned fsFlags;                   /* cached details from statfs() */
................................................................................
  unixFile *pFile = (unixFile*)id;
  int eFileLock = pFile->eFileLock;
  int rc = SQLITE_OK;
  
  if( eFileLock<eTargetFileLock ){
    rc = pFile->pMethod->xLock(id, SQLITE_LOCK_SHARED);
  }
  if( !rc && eFileLock<eTargetFileLock ){
    rc = pFile->pMethod->xLock(id, SQLITE_LOCK_EXCLUSIVE);
  }
  if( rc ){
    if( pFile->eFileLock > eFileLock ){
      pFile->pMethod->xUnlock(id, eFileLock);
    }
    return rc;
................................................................................
*/
static void robust_close(unixFile *pFile, int h, int lineno){
  if( osClose(h) ){
    unixLogErrorAtLine(SQLITE_IOERR_CLOSE, "close",
                       pFile ? pFile->zPath : 0, lineno);
  }
}





/*
** Close all file descriptors accumuated in the unixInodeInfo->pUnused list.
*/ 
static void closePendingFds(unixFile *pFile){
  unixInodeInfo *pInode = pFile->pInode;
  UnixUnusedFd *p;
  UnixUnusedFd *pNext;
  for(p=pInode->pUnused; p; p=pNext){
    pNext = p->pNext;
#if OSCLOSE_CHECK_CLOSE_IOERR
    if( close(p->fd) ){
      pFile->lastErrno = errno;
      rc = SQLITE_IOERR_CLOSE;
      p->pNext = pError;
      pError = p;
    }else{
      sqlite3_free(p);
    }
#else
................................................................................

  /* Get low-level information about the file that we can used to
  ** create a unique name for the file.
  */
  fd = pFile->h;
  rc = osFstat(fd, &statbuf);
  if( rc!=0 ){
    pFile->lastErrno = errno;
#ifdef EOVERFLOW
    if( pFile->lastErrno==EOVERFLOW ) return SQLITE_NOLFS;
#endif
    return SQLITE_IOERR;
  }

#ifdef __APPLE__
................................................................................
  ** in the header of every SQLite database.  In this way, if there
  ** is a race condition such that another thread has already populated
  ** the first page of the database, no damage is done.
  */
  if( statbuf.st_size==0 && (pFile->fsFlags & SQLITE_FSFLAGS_IS_MSDOS)!=0 ){
    do{ rc = osWrite(fd, "S", 1); }while( rc<0 && errno==EINTR );
    if( rc!=1 ){
      pFile->lastErrno = errno;
      return SQLITE_IOERR;
    }
    rc = osFstat(fd, &statbuf);
    if( rc!=0 ){
      pFile->lastErrno = errno;
      return SQLITE_IOERR;
    }
  }
#endif

  memset(&fileId, 0, sizeof(fileId));
  fileId.dev = statbuf.st_dev;
................................................................................
    lock.l_start = RESERVED_BYTE;
    lock.l_len = 1;
    lock.l_type = F_WRLCK;
    if( osFcntl(pFile->h, F_GETLK, &lock) ){
#if OSLOCKING_CHECK_BUSY_IOERR
      int tErrno = errno;
      rc = sqliteErrorFromPosixError(tErrno, SQLITE_IOERR_CHECKRESERVEDLOCK);
      pFile->lastErrno = tErrno;
#else
      rc = SQLITE_IOERR_CHECKRESERVEDLOCK;
      pFile->lastErrno = errno;
#endif
    } else if( lock.l_type!=F_UNLCK ){
      reserved = 1;
    }
  }
#endif
  
................................................................................
  ){
    lock.l_type = (eFileLock==SHARED_LOCK?F_RDLCK:F_WRLCK);
    lock.l_start = PENDING_BYTE;
    if( unixFileLock(pFile, &lock, 0) ){
      tErrno = errno;
      rc = sqliteErrorFromPosixError(tErrno, SQLITE_IOERR_LOCK);
      if( IS_LOCK_ERROR(rc) ){
        pFile->lastErrno = tErrno;
      }
      goto end_lock;
    }
  }


  /* If control gets to this point, then actually go ahead and make
................................................................................
#else
      rc = SQLITE_IOERR_UNLOCK; 
#endif
    }

    if( rc ){
      if( IS_LOCK_ERROR(rc) ){
        pFile->lastErrno = tErrno;
      }
      goto end_lock;
    }else{
      pFile->eFileLock = SHARED_LOCK;
      pInode->nLock++;
      pInode->nShared = 1;
    }
................................................................................
      lock.l_len = SHARED_SIZE;
    }

    if( unixFileLock(pFile, &lock, 0) ){
      tErrno = errno;
      rc = sqliteErrorFromPosixError(tErrno, SQLITE_IOERR_LOCK);
      if( rc!=SQLITE_BUSY ){
        pFile->lastErrno = tErrno;
      }
    }
  }
  

#ifndef NDEBUG
  /* Set up the transaction-counter change checking flags when
................................................................................
          tErrno = errno;
#if OSLOCKING_CHECK_BUSY_IOERR
          rc = sqliteErrorFromPosixError(tErrno, SQLITE_IOERR_UNLOCK);
#else
          rc = SQLITE_IOERR_UNLOCK;
#endif
          if( IS_LOCK_ERROR(rc) ){
            pFile->lastErrno = tErrno;
          }
          goto end_unlock;
        }
        lock.l_type = F_RDLCK;
        lock.l_whence = SEEK_SET;
        lock.l_start = SHARED_FIRST;
        lock.l_len = divSize;
................................................................................
          tErrno = errno;
#if OSLOCKING_CHECK_BUSY_IOERR
          rc = sqliteErrorFromPosixError(tErrno, SQLITE_IOERR_RDLOCK);
#else
          rc = SQLITE_IOERR_UNLOCK;
#endif
          if( IS_LOCK_ERROR(rc) ){
            pFile->lastErrno = tErrno;
          }
          goto end_unlock;
        }
        lock.l_type = F_UNLCK;
        lock.l_whence = SEEK_SET;
        lock.l_start = SHARED_FIRST+divSize;
        lock.l_len = SHARED_SIZE-divSize;
................................................................................
          tErrno = errno;
#if OSLOCKING_CHECK_BUSY_IOERR
          rc = sqliteErrorFromPosixError(tErrno, SQLITE_IOERR_UNLOCK);
#else
          rc = SQLITE_IOERR_UNLOCK;
#endif
          if( IS_LOCK_ERROR(rc) ){
            pFile->lastErrno = tErrno;
          }
          goto end_unlock;
        }
      }else
#endif /* defined(__APPLE__) && SQLITE_ENABLE_LOCKING_STYLE */
      {
        lock.l_type = F_RDLCK;
................................................................................
          /* In theory, the call to unixFileLock() cannot fail because another
          ** process is holding an incompatible lock. If it does, this 
          ** indicates that the other process is not following the locking
          ** protocol. If this happens, return SQLITE_IOERR_RDLOCK. Returning
          ** SQLITE_BUSY would confuse the upper layer (in practice it causes 
          ** an assert to fail). */ 
          rc = SQLITE_IOERR_RDLOCK;
          pFile->lastErrno = tErrno;
#endif
          if( IS_LOCK_ERROR(rc) ){
            pFile->lastErrno = tErrno;
          }
          goto end_unlock;
        }
      }
    }
    lock.l_type = F_UNLCK;
    lock.l_whence = SEEK_SET;
................................................................................
    if( unixFileLock(pFile, &lock, 10)==0 ){
      pInode->eFileLock = SHARED_LOCK;
    }else{
#if OSLOCKING_CHECK_BUSY_IOERR
      tErrno = errno;
      rc = sqliteErrorFromPosixError(tErrno, SQLITE_IOERR_UNLOCK);
      if( IS_LOCK_ERROR(rc) ){
        pFile->lastErrno = tErrno;
      }
#else
      rc = SQLITE_IOERR_UNLOCK;
      pFile->lastErrno = errno;
#endif
      goto end_unlock;
    }
  }
  if( eFileLock==NO_LOCK ){
    /* Decrement the shared lock counter.  Release the lock using an
    ** OS call only when all threads in this same process have released
................................................................................
      if( unixFileLock(pFile, &lock, 10)==0 ){
        pInode->eFileLock = NO_LOCK;
      }else{
#if OSLOCKING_CHECK_BUSY_IOERR
        tErrno = errno;
        rc = sqliteErrorFromPosixError(tErrno, SQLITE_IOERR_UNLOCK);
        if( IS_LOCK_ERROR(rc) ){
          pFile->lastErrno = tErrno;
        }
#else
        rc = SQLITE_IOERR_UNLOCK;
	    pFile->lastErrno = errno;
#endif
        pInode->eFileLock = NO_LOCK;
        pFile->eFileLock = NO_LOCK;
      }
    }

    /* Decrement the count of locks against this same file.  When the
................................................................................
*/
static int closeUnixFile(sqlite3_file *id){
  unixFile *pFile = (unixFile*)id;
#if OSCLOSE_CHECK_CLOSE_IOERR
  if( pFile->h>=0 ){
    int err = close(pFile->h);
    if( err ){
      pFile->lastErrno = errno;
      return SQLITE_IOERR_CLOSE;
    }else{
      pFile->h=-1;
    }
  }
#else
  if( pFile->h>=0 ){
................................................................................
    /* failed to open/create the lock directory */
    int tErrno = errno;
    if( EEXIST == tErrno ){
      rc = SQLITE_BUSY;
    } else {
      rc = sqliteErrorFromPosixError(tErrno, SQLITE_IOERR_LOCK);
      if( IS_LOCK_ERROR(rc) ){
        pFile->lastErrno = tErrno;
      }
    }
    return rc;
  } 
  
  /* got it, set the type and return ok */
  pFile->eFileLock = eFileLock;
................................................................................
#if OSLOCKING_CHECK_BUSY_IOERR
      rc = sqliteErrorFromPosixError(tErrno, SQLITE_IOERR_UNLOCK);
#else
      rc = SQLITE_IOERR_UNLOCK;
#endif
    }
    if( IS_LOCK_ERROR(rc) ){
      pFile->lastErrno = tErrno;
    }
    return rc; 
  }
  pFile->eFileLock = NO_LOCK;
  return SQLITE_OK;
}

................................................................................
        /* unlock failed with an error */
#if OSLOCKING_CHECK_BUSY_IOERR
        lrc = sqliteErrorFromPosixError(tErrno, SQLITE_IOERR_UNLOCK);
#else 
        lrc = SQLITE_IOERR_UNLOCK; 
#endif
        if( IS_LOCK_ERROR(lrc) ){
          pFile->lastErrno = tErrno;
          rc = lrc;
        }
      }
    } else {
      int tErrno = errno;
      reserved = 1;
      /* someone else might have it reserved */
      lrc = sqliteErrorFromPosixError(tErrno, SQLITE_IOERR_LOCK); 
      if( IS_LOCK_ERROR(lrc) ){
        pFile->lastErrno = tErrno;
        rc = lrc;
      }
    }
  }
  OSTRACE(("TEST WR-LOCK %d %d %d (flock)\n", pFile->h, rc, reserved));

#ifdef SQLITE_IGNORE_FLOCK_LOCK_ERRORS
................................................................................
  /* grab an exclusive lock */
  
  if (robust_flock(pFile->h, LOCK_EX | LOCK_NB)) {
    int tErrno = errno;
    /* didn't get, must be busy */
    rc = sqliteErrorFromPosixError(tErrno, SQLITE_IOERR_LOCK);
    if( IS_LOCK_ERROR(rc) ){
      pFile->lastErrno = tErrno;
    }
  } else {
    /* got it, set the type and return ok */
    pFile->eFileLock = eFileLock;
  }
  OSTRACE(("LOCK    %d %s %s (flock)\n", pFile->h, azFileLock(eFileLock), 
           rc==SQLITE_OK ? "ok" : "failed"));
................................................................................
    sem_t *pSem = pFile->pInode->pSem;
    struct stat statBuf;

    if( sem_trywait(pSem)==-1 ){
      int tErrno = errno;
      if( EAGAIN != tErrno ){
        rc = sqliteErrorFromPosixError(tErrno, SQLITE_IOERR_CHECKRESERVEDLOCK);
        pFile->lastErrno = tErrno;
      } else {
        /* someone else has the lock when we are in NO_LOCK */
        reserved = (pFile->eFileLock < SHARED_LOCK);
      }
    }else{
      /* we could have it if we want it */
      sem_post(pSem);
................................................................................
  }
  
  /* no, really unlock. */
  if ( sem_post(pSem)==-1 ) {
    int rc, tErrno = errno;
    rc = sqliteErrorFromPosixError(tErrno, SQLITE_IOERR_UNLOCK);
    if( IS_LOCK_ERROR(rc) ){
      pFile->lastErrno = tErrno;
    }
    return rc; 
  }
  pFile->eFileLock = NO_LOCK;
  return SQLITE_OK;
}

................................................................................
#ifdef SQLITE_IGNORE_AFP_LOCK_ERRORS
    rc = SQLITE_BUSY;
#else
    rc = sqliteErrorFromPosixError(tErrno,
                    setLockFlag ? SQLITE_IOERR_LOCK : SQLITE_IOERR_UNLOCK);
#endif /* SQLITE_IGNORE_AFP_LOCK_ERRORS */
    if( IS_LOCK_ERROR(rc) ){
      pFile->lastErrno = tErrno;
    }
    return rc;
  } else {
    return SQLITE_OK;
  }
}

................................................................................
    if( IS_LOCK_ERROR(lrc1) ){
      lrc1Errno = pFile->lastErrno;
    }
    /* Drop the temporary PENDING lock */
    lrc2 = afpSetLock(context->dbPath, pFile, PENDING_BYTE, 1, 0);
    
    if( IS_LOCK_ERROR(lrc1) ) {
      pFile->lastErrno = lrc1Errno;
      rc = lrc1;
      goto afp_end_lock;
    } else if( IS_LOCK_ERROR(lrc2) ){
      rc = lrc2;
      goto afp_end_lock;
    } else if( lrc1 != SQLITE_OK ) {
      rc = lrc1;
................................................................................
    got = osPread64(id->h, pBuf, cnt, offset);
    SimulateIOError( got = -1 );
#else
    newOffset = lseek(id->h, offset, SEEK_SET);
    SimulateIOError( newOffset-- );
    if( newOffset!=offset ){
      if( newOffset == -1 ){
        ((unixFile*)id)->lastErrno = errno;
      }else{
        ((unixFile*)id)->lastErrno = 0;			
      }
      return -1;
    }
    got = osRead(id->h, pBuf, cnt);
#endif
    if( got==cnt ) break;
    if( got<0 ){
      if( errno==EINTR ){ got = 1; continue; }
      prior = 0;
      ((unixFile*)id)->lastErrno = errno;
      break;
    }else if( got>0 ){
      cnt -= got;
      offset += got;
      prior += got;
      pBuf = (void*)(got + (char*)pBuf);
    }
................................................................................
  got = seekAndRead(pFile, offset, pBuf, amt);
  if( got==amt ){
    return SQLITE_OK;
  }else if( got<0 ){
    /* lastErrno set by seekAndRead */
    return SQLITE_IOERR_READ;
  }else{
    pFile->lastErrno = 0; /* not a system error */
    /* Unread parts of the buffer must be zero-filled */
    memset(&((char*)pBuf)[got], 0, amt-got);
    return SQLITE_IOERR_SHORT_READ;
  }
}

/*
................................................................................
  do{ got = osPwrite64(id->h, pBuf, cnt, offset);}while( got<0 && errno==EINTR);
#else
  do{
    newOffset = lseek(id->h, offset, SEEK_SET);
    SimulateIOError( newOffset-- );
    if( newOffset!=offset ){
      if( newOffset == -1 ){
        ((unixFile*)id)->lastErrno = errno;
      }else{
        ((unixFile*)id)->lastErrno = 0;			
      }
      return -1;
    }
    got = osWrite(id->h, pBuf, cnt);
  }while( got<0 && errno==EINTR );
#endif
  TIMER_END;
  if( got<0 ){
    ((unixFile*)id)->lastErrno = errno;
  }

  OSTRACE(("WRITE   %-3d %5d %7lld %llu\n", id->h, got, offset, TIMER_ELAPSED));
  return got;
}


................................................................................
  SimulateDiskfullError(( wrote=0, amt=1 ));

  if( amt>0 ){
    if( wrote<0 && pFile->lastErrno!=ENOSPC ){
      /* lastErrno set by seekAndWrite */
      return SQLITE_IOERR_WRITE;
    }else{
      pFile->lastErrno = 0; /* not a system error */
      return SQLITE_FULL;
    }
  }

  return SQLITE_OK;
}

................................................................................
  SimulateDiskfullError( return SQLITE_FULL );

  assert( pFile );
  OSTRACE(("SYNC    %-3d\n", pFile->h));
  rc = full_fsync(pFile->h, isFullsync, isDataOnly);
  SimulateIOError( rc=1 );
  if( rc ){
    pFile->lastErrno = errno;
    return unixLogError(SQLITE_IOERR_FSYNC, "full_fsync", pFile->zPath);
  }

  /* Also fsync the directory containing the file if the DIRSYNC flag
  ** is set.  This is a one-time occurrance.  Many systems (examples: AIX)
  ** are unable to fsync a directory, so ignore errors on the fsync.
  */
................................................................................
    OSTRACE(("DIRSYNC %s (have_fullfsync=%d fullsync=%d)\n", pFile->zPath,
            HAVE_FULLFSYNC, isFullsync));
    rc = osOpenDirectory(pFile->zPath, &dirfd);
    if( rc==SQLITE_OK && dirfd>=0 ){
      full_fsync(dirfd, 0, 0);
#if OSCLOSE_CHECK_CLOSE_IOERR
      if( close(pFile->dirfd) ){
        pFile->lastErrno = errno;
        rc = SQLITE_IOERR_DIR_CLOSE;
      }
#else
      robust_close(pFile, dirfd, __LINE__);
#endif
    }else if( rc==SQLITE_CANTOPEN ){
      rc = SQLITE_OK;
................................................................................
  */
  if( pFile->szChunk>0 ){
    nByte = ((nByte + pFile->szChunk - 1)/pFile->szChunk) * pFile->szChunk;
  }

  rc = robust_ftruncate(pFile->h, (off_t)nByte);
  if( rc ){
    pFile->lastErrno = errno;
    return unixLogError(SQLITE_IOERR_TRUNCATE, "ftruncate", pFile->zPath);
  }else{
#ifndef NDEBUG
    /* If we are doing a normal write to a database file (as opposed to
    ** doing a hot-journal rollback or a write to some file other than a
    ** normal database file) and we truncate the file to zero length,
    ** that effectively updates the change counter.  This might happen
................................................................................
static int unixFileSize(sqlite3_file *id, i64 *pSize){
  int rc;
  struct stat buf;
  assert( id );
  rc = osFstat(((unixFile*)id)->h, &buf);
  SimulateIOError( rc=1 );
  if( rc!=0 ){
    ((unixFile*)id)->lastErrno = errno;
    return SQLITE_IOERR_FSTAT;
  }
  *pSize = buf.st_size;

  /* When opening a zero-size database, the findInodeInfo() procedure
  ** writes a single byte into that file in order to work around a bug
  ** in the OS-X msdos filesystem.  In order to avoid problems with upper
................................................................................
      ** is the same technique used by glibc to implement posix_fallocate()
      ** on systems that do not have a real fallocate() system call.
      */
      int nBlk = buf.st_blksize;  /* File-system block size */
      i64 iWrite;                 /* Next offset to write to */

      if( robust_ftruncate(pFile->h, nSize) ){
        pFile->lastErrno = errno;
        return unixLogError(SQLITE_IOERR_TRUNCATE, "ftruncate", pFile->zPath);
      }
      iWrite = ((buf.st_size + 2*nBlk - 1)/nBlk)*nBlk-1;
      while( iWrite<nSize ){
        int nWrite = seekAndWrite(pFile, iWrite, "", 1);
        if( nWrite!=1 ) return SQLITE_IOERR_WRITE;
        iWrite += nBlk;
................................................................................
    pSrcPager = sqlite3BtreePager(pSrcBtree);
    assert( pSrcPager!=0 );
    src_file = sqlite3PagerFile(pSrcPager);
    assert( src_file!=0 );
    if( src_file->pMethods ){
      int srcFlags = 0;
      pSrcFile = (unixFile *)src_file;
      /* wal mode db cannot be opened readonly */
      if ((pSrcFile->openFlags & O_RDWR) == O_RDWR) {
        srcFlags = SQLITE_OPEN_READWRITE;
      } else {
        srcFlags = SQLITE_OPEN_READONLY;
      }



#if SQLITE_ENABLE_DATA_PROTECTION
      srcFlags |= pSrcFile->protFlags;
#endif
#if SQLITE_ENABLE_LOCKING_STYLE
      if( isProxyLockingMode(pSrcFile) ){
        srcFlags |= SQLITE_OPEN_AUTOPROXY;
      }
................................................................................
      if( fcopyfile(srcWalFD, dstWalFD, s, COPYFILE_ALL) ){
        int err=errno;
        switch(err) {
          case ENOMEM:
            rc = SQLITE_NOMEM;
            break;
          default:
            pFile->lastErrno = err;
            rc = SQLITE_IOERR;
        }
      }
      copyfile_state_free(s);
      close(dstWalFD);
    }
    close(srcWalFD);
................................................................................
    if( fcopyfile(pSrcFile->h, pFile->h, s, COPYFILE_ALL) ){
      int err=errno;
      switch(err) {
        case ENOMEM:
          rc = SQLITE_NOMEM;
          break;
        default:
          pFile->lastErrno = err;
          rc = SQLITE_IOERR;
      }
    }
    copyfile_state_free(s);
    
    if (srcChange == dstChange) {
      /* modify the change counter to force page zero to be reloaded */
................................................................................
    if( pShmNode->mutex==0 ){
      rc = SQLITE_NOMEM;
      goto shm_open_err;
    }

    if( pInode->bProcessLock==0 ){
      int openFlags = O_RDWR | O_CREAT;
      if( sqlite3_uri_boolean(pDbFd->zPath, "readonly_shm", 0) ){





        openFlags = O_RDONLY;
        pShmNode->isReadonly = 1;
      }
      pShmNode->h = robust_open(zShmFilename, openFlags, (sStat.st_mode&0777));
      if( pShmNode->h<0 ){
        rc = unixLogError(SQLITE_CANTOPEN_BKPT, "open", zShmFilename);
        goto shm_open_err;
................................................................................
          close(jfd);
        }
      }
    }
  }
  return SQLITE_OK;
}










































































static int unixTruncateDatabase(unixFile *pFile, int bFlags) {
  sqlite3_file *id = (sqlite3_file *)pFile;
  int rc = SQLITE_OK;
  void *pLock = NULL;
  int flags = 0;
  int corruptFileLock = 0;
  int isCorrupt = 0;

    
#if SQLITE_ENABLE_DATA_PROTECTION
  flags |= pFile->protFlags;
#endif
#if SQLITE_ENABLE_LOCKING_STYLE
  if( isProxyLockingMode(pFile) ){
    flags |= SQLITE_OPEN_AUTOPROXY;
  }
................................................................................
  
  rc = sqlite3demo_superlock(pFile->zPath, 0, flags, 0, 0, &pLock);
  if( rc ){
    if( rc==SQLITE_CORRUPT || rc==SQLITE_NOTADB ){
      isCorrupt = 1;
      rc = sqlite3demo_superlock_corrupt(id, SQLITE_LOCK_EXCLUSIVE, &corruptFileLock);
    }
    if( rc ){
      return rc;
    }
  }
  if( bFlags!=0 ){
    /* initialize a new database in TMPDIR and copy the contents over */
    const char *tDir = unixTempFileDir();
    int tLen = sizeof(char) * (strlen(tDir) + 11);
    char *tDbPath = (char *)malloc(tLen);
    int tFd = -1;
    
    strlcpy(tDbPath, tDir, tLen);
    strlcat(tDbPath, "tmpdbXXXXX", tLen);
    tFd = mkstemp(tDbPath);
    if( tFd==-1 ){
      pFile->lastErrno=errno;
      rc = SQLITE_IOERR;




    }else{
      sqlite3 *tDb = NULL;
      copyfile_state_t s;
      int trc = sqlite3_open_v2(tDbPath, &tDb, SQLITE_OPEN_CREATE | SQLITE_OPEN_READWRITE | SQLITE_OPEN_AUTOPROXY, NULL);
      char *errmsg = NULL;
      const char *sql = "";
      if( !trc && (bFlags&SQLITE_TRUNCATE_PAGESIZE_MASK) ){
................................................................................
        if( !tDb ){
          fprintf(stderr, "failed to open temp database '%s' to reset truncated database %s with flags %x: %d\n", tDbPath, pFile->zPath, bFlags, trc);
        }else{
          fprintf(stderr, "failed to set '%s' on truncated database %s, %d: %s\n", sql, pFile->zPath, trc, errmsg);
        }
      }
      if( tDb ){



        sqlite3_close(tDb);
      }
      s = copyfile_state_alloc();
      lseek(tFd, 0, SEEK_SET);
      lseek(pFile->h, 0, SEEK_SET);
      if( fcopyfile(tFd, pFile->h, s, COPYFILE_ALL) ){
        int err=errno;
        switch(err) {
          case ENOMEM:
            rc = SQLITE_NOMEM;
            break;
          default:
            pFile->lastErrno = err;
            rc = SQLITE_IOERR;
        }
      }
      copyfile_state_free(s);
      fsync(pFile->h);
      close(tFd);
      unlink(tDbPath);
    }
    free(tDbPath);
  } else {
    rc = pFile->pMethod->xTruncate(id, ((pFile->fsFlags & SQLITE_FSFLAGS_IS_MSDOS) != 0) ? 1L : 0L);
  }
  if( rc==SQLITE_OK ){
    unixInvalidateSupportFiles(pFile, 0);
  }
  pFile->pMethod->xSync(id, SQLITE_SYNC_FULL);


  if( isCorrupt ){
    sqlite3demo_superunlock_corrupt(id, corruptFileLock);
  }else{
    sqlite3demo_superunlock(pLock);


  }





  return rc;
}

/*
 ** Lock locations for shared-memory locks used by WAL mode.
 */
#ifndef SHM_BASE
................................................................................
** This test only works for lock testing on unix/posix VFS.
** Adapted from tool/getlock.c f4c39b651370156cae979501a7b156bdba50e7ce
*/
static int unixLockstatePid(unixFile *pFile, pid_t pid, int *pLockstate){
  int hDb;        /* File descriptor for the open database file */
  int hShm = -1;  /* File descriptor for WAL shared-memory file */
  ssize_t got;    /* Bytes read from header */
  int isWal;                 /* True if in WAL mode */
  int nLock = 0;             /* Number of locks held */

  unsigned char aHdr[100];   /* Database header */
  
  assert(pLockstate);
  
  /* make sure we are dealing with a database file */
  hDb = pFile->h;
  if( hDb<0 ){
................................................................................
  }
  assert( (strlen(SQLITE_FILE_HEADER)+1)==SQLITE_FILE_HEADER_LEN );
  got = pread(hDb, aHdr, 100, 0);
  if( got<0 ){
    *pLockstate = SQLITE_LOCKSTATE_ERROR;
    return SQLITE_ERROR;
  }


  if( got!=100 || memcmp(aHdr, SQLITE_FILE_HEADER, SQLITE_FILE_HEADER_LEN)!=0 ){
    *pLockstate = SQLITE_LOCKSTATE_NOTADB;
    return SQLITE_NOTADB;
  }
  
  /* First check for an exclusive lock */
  nLock += unixIsLocked(pid, hDb, F_RDLCK, SHARED_FIRST, SHARED_SIZE, "EXCLUSIVE");

  isWal = aHdr[18]==2;

  if( nLock==0 && isWal==0 ){
    /* Rollback mode */
    nLock += unixIsLocked(pid, hDb, F_WRLCK, PENDING_BYTE, SHARED_SIZE+2, "PENDING|RESERVED|SHARED");
  }
  if( nLock==0 && isWal!=0 ){
    /* lookup the file descriptor for the shared memory file if we have it open in this process */
    unixEnterMutex(); /* Because pFile->pInode is shared across threads */
................................................................................
  if( isDelete ){
#if OS_VXWORKS
    zPath = zName;
#else
    osUnlink(zName);
#endif
  }
#if SQLITE_ENABLE_LOCKING_STYLE
  else{
    p->openFlags = openFlags;
  }
#endif

  noLock = eType!=SQLITE_OPEN_MAIN_DB;

  
#if defined(__APPLE__) || SQLITE_ENABLE_LOCKING_STYLE
  if( fstatfs(fd, &fsInfo) == -1 ){
    ((unixFile*)pFile)->lastErrno = errno;
    robust_close(p, fd, __LINE__);
    return SQLITE_IOERR_ACCESS;
  }
  if (0 == strncmp("msdos", fsInfo.f_fstypename, 5)) {
    ((unixFile*)pFile)->fsFlags |= SQLITE_FSFLAGS_IS_MSDOS;
  }
  if (0 == strncmp("exfat", fsInfo.f_fstypename, 5)) {
................................................................................

  /* Set up appropriate ctrlFlags */
  if( isDelete )                ctrlFlags |= UNIXFILE_DELETE;
  if( isReadonly )              ctrlFlags |= UNIXFILE_RDONLY;
  if( noLock )                  ctrlFlags |= UNIXFILE_NOLOCK;
  if( syncDir )                 ctrlFlags |= UNIXFILE_DIRSYNC;
  if( flags & SQLITE_OPEN_URI ) ctrlFlags |= UNIXFILE_URI;






#if SQLITE_ENABLE_LOCKING_STYLE
#if SQLITE_PREFER_PROXY_LOCKING
  isAutoProxy = 1;
#endif
  if( isAutoProxy && (zPath!=NULL) && (!noLock) && pVfs->xOpen ){
    char *envforce = getenv("SQLITE_FORCE_PROXY_LOCKING");
................................................................................
       * 1st try: get the mod time of the conch, wait 0.5s and try again. 
       * 2nd try: fail if the mod time changed or host id is different, wait 
       *           10 sec and try again
       * 3rd try: break the lock unless the mod time has changed.
       */
      struct stat buf;
      if( osFstat(conchFile->h, &buf) ){
        pFile->lastErrno = errno;
        return SQLITE_IOERR_LOCK;
      }
      
      if( pCtx->nFails==1 ){
        conchModTime = buf.st_mtimespec;
        usleep(500000); /* wait 0.5 sec and try the lock again*/
        continue;  
................................................................................
        return SQLITE_BUSY;
      }
      
      if( pCtx->nFails==2 ){  
        char tBuf[PROXY_MAXCONCHLEN];
        int len = osPread(conchFile->h, tBuf, PROXY_MAXCONCHLEN, 0);
        if( len<0 ){
          pFile->lastErrno = errno;
          return SQLITE_IOERR_LOCK;
        }
        if( len>PROXY_PATHINDEX && tBuf[0]==(char)PROXY_CONCHVERSION){
          /* don't break the lock if the host id doesn't match, but do log
           * an error to console so users can diagnose stale NFS locks more 
           * easily 
           */
................................................................................
    int forceNewLockPath = 0;
    
    OSTRACE(("TAKECONCH  %d for %s pid=%d\n", conchFile->h,
             (pCtx->lockProxyPath ? pCtx->lockProxyPath : ":auto:"), getpid()));

    rc = proxyGetHostID(myHostID, &pError);
    if( (rc&0xff)==SQLITE_IOERR ){
      pFile->lastErrno = pError;
      goto end_takeconch;
    }
    rc = proxyConchLock(pFile, myHostID, SHARED_LOCK);
    if( rc!=SQLITE_OK ){
      goto end_takeconch;
    }
    /* read the existing conch file */
    readLen = seekAndRead((unixFile*)conchFile, 0, readBuf, PROXY_MAXCONCHLEN);
    if( readLen<0 ){
      /* I/O error: lastErrno set by seekAndRead */
      pFile->lastErrno = conchFile->lastErrno;
      rc = SQLITE_IOERR_READ;
      goto end_takeconch;
    }else if( readLen<=(PROXY_HEADERLEN+PROXY_HOSTIDLEN) || 
             readBuf[0]!=(char)PROXY_CONCHVERSION ){
      /* a short read or version format mismatch means we need to create a new 
      ** conch file. 
      */
................................................................................
    end_takeconch:
      OSTRACE(("TRANSPROXY: CLOSE  %d\n", pFile->h));
      if( rc==SQLITE_OK && pFile->openFlags ){
        int fd;
        if( pFile->h>=0 ){
#if defined(STRICT_CLOSE_ERROR) && OSCLOSE_CHECK_CLOSE_IOERR
          if( close(pFile->h) ){
            pFile->lastErrno = errno;
            return SQLITE_IOERR_CLOSE;
          }
#else
          robust_close(pFile, pFile->h, __LINE__);
#endif
        }
        pFile->h = -1;







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....
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....
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....
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....
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....
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....
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....
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....
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....
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....
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....
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....
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....
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....
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....
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....
6287
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....
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....
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7221
7222
....
7228
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7240
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7242
....
7305
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7321
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7326
7327
7328
7329
7330
....
7446
7447
7448
7449
7450
7451
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7453
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7456
7457
7458
7459
7460
  unsigned short int ctrlFlags;       /* Behavioral bits.  UNIXFILE_* flags */
  int lastErrno;                      /* The unix errno from last I/O error */
  void *lockingContext;               /* Locking style specific state */
  UnixUnusedFd *pUnused;              /* Pre-allocated UnixUnusedFd */
  const char *zPath;                  /* Name of the file */
  unixShm *pShm;                      /* Shared memory segment information */
  int szChunk;                        /* Configured by FCNTL_CHUNK_SIZE */
#if SQLITE_ENABLE_LOCKING_STYLE || defined(__APPLE__)
  int openFlags;                      /* The flags specified at open() */
#endif
#if SQLITE_ENABLE_DATA_PROTECTION
  int protFlags;                      /* Data protection flags from unixOpen */
#endif
#if SQLITE_ENABLE_LOCKING_STYLE || defined(__APPLE__)
  unsigned fsFlags;                   /* cached details from statfs() */
................................................................................
  unixFile *pFile = (unixFile*)id;
  int eFileLock = pFile->eFileLock;
  int rc = SQLITE_OK;
  
  if( eFileLock<eTargetFileLock ){
    rc = pFile->pMethod->xLock(id, SQLITE_LOCK_SHARED);
  }
  if( !rc && SQLITE_LOCK_SHARED<eTargetFileLock ){
    rc = pFile->pMethod->xLock(id, SQLITE_LOCK_EXCLUSIVE);
  }
  if( rc ){
    if( pFile->eFileLock > eFileLock ){
      pFile->pMethod->xUnlock(id, eFileLock);
    }
    return rc;
................................................................................
*/
static void robust_close(unixFile *pFile, int h, int lineno){
  if( osClose(h) ){
    unixLogErrorAtLine(SQLITE_IOERR_CLOSE, "close",
                       pFile ? pFile->zPath : 0, lineno);
  }
}

static void storeLastErrno(unixFile *pFile, int error){
  pFile->lastErrno = error;
}

/*
** Close all file descriptors accumuated in the unixInodeInfo->pUnused list.
*/ 
static void closePendingFds(unixFile *pFile){
  unixInodeInfo *pInode = pFile->pInode;
  UnixUnusedFd *p;
  UnixUnusedFd *pNext;
  for(p=pInode->pUnused; p; p=pNext){
    pNext = p->pNext;
#if OSCLOSE_CHECK_CLOSE_IOERR
    if( close(p->fd) ){
      storeLastErrno(pFile, errno);
      rc = SQLITE_IOERR_CLOSE;
      p->pNext = pError;
      pError = p;
    }else{
      sqlite3_free(p);
    }
#else
................................................................................

  /* Get low-level information about the file that we can used to
  ** create a unique name for the file.
  */
  fd = pFile->h;
  rc = osFstat(fd, &statbuf);
  if( rc!=0 ){
    storeLastErrno(pFile, errno);
#ifdef EOVERFLOW
    if( pFile->lastErrno==EOVERFLOW ) return SQLITE_NOLFS;
#endif
    return SQLITE_IOERR;
  }

#ifdef __APPLE__
................................................................................
  ** in the header of every SQLite database.  In this way, if there
  ** is a race condition such that another thread has already populated
  ** the first page of the database, no damage is done.
  */
  if( statbuf.st_size==0 && (pFile->fsFlags & SQLITE_FSFLAGS_IS_MSDOS)!=0 ){
    do{ rc = osWrite(fd, "S", 1); }while( rc<0 && errno==EINTR );
    if( rc!=1 ){
      storeLastErrno(pFile, errno);
      return SQLITE_IOERR;
    }
    rc = osFstat(fd, &statbuf);
    if( rc!=0 ){
      storeLastErrno(pFile, errno);
      return SQLITE_IOERR;
    }
  }
#endif

  memset(&fileId, 0, sizeof(fileId));
  fileId.dev = statbuf.st_dev;
................................................................................
    lock.l_start = RESERVED_BYTE;
    lock.l_len = 1;
    lock.l_type = F_WRLCK;
    if( osFcntl(pFile->h, F_GETLK, &lock) ){
#if OSLOCKING_CHECK_BUSY_IOERR
      int tErrno = errno;
      rc = sqliteErrorFromPosixError(tErrno, SQLITE_IOERR_CHECKRESERVEDLOCK);
      storeLastErrno(pFile, tErrno);
#else
      rc = SQLITE_IOERR_CHECKRESERVEDLOCK;
      storeLastErrno(pFile, errno);
#endif
    } else if( lock.l_type!=F_UNLCK ){
      reserved = 1;
    }
  }
#endif
  
................................................................................
  ){
    lock.l_type = (eFileLock==SHARED_LOCK?F_RDLCK:F_WRLCK);
    lock.l_start = PENDING_BYTE;
    if( unixFileLock(pFile, &lock, 0) ){
      tErrno = errno;
      rc = sqliteErrorFromPosixError(tErrno, SQLITE_IOERR_LOCK);
      if( IS_LOCK_ERROR(rc) ){
        storeLastErrno(pFile, tErrno);
      }
      goto end_lock;
    }
  }


  /* If control gets to this point, then actually go ahead and make
................................................................................
#else
      rc = SQLITE_IOERR_UNLOCK; 
#endif
    }

    if( rc ){
      if( IS_LOCK_ERROR(rc) ){
        storeLastErrno(pFile, tErrno);
      }
      goto end_lock;
    }else{
      pFile->eFileLock = SHARED_LOCK;
      pInode->nLock++;
      pInode->nShared = 1;
    }
................................................................................
      lock.l_len = SHARED_SIZE;
    }

    if( unixFileLock(pFile, &lock, 0) ){
      tErrno = errno;
      rc = sqliteErrorFromPosixError(tErrno, SQLITE_IOERR_LOCK);
      if( rc!=SQLITE_BUSY ){
        storeLastErrno(pFile, tErrno);
      }
    }
  }
  

#ifndef NDEBUG
  /* Set up the transaction-counter change checking flags when
................................................................................
          tErrno = errno;
#if OSLOCKING_CHECK_BUSY_IOERR
          rc = sqliteErrorFromPosixError(tErrno, SQLITE_IOERR_UNLOCK);
#else
          rc = SQLITE_IOERR_UNLOCK;
#endif
          if( IS_LOCK_ERROR(rc) ){
            storeLastErrno(pFile, tErrno);
          }
          goto end_unlock;
        }
        lock.l_type = F_RDLCK;
        lock.l_whence = SEEK_SET;
        lock.l_start = SHARED_FIRST;
        lock.l_len = divSize;
................................................................................
          tErrno = errno;
#if OSLOCKING_CHECK_BUSY_IOERR
          rc = sqliteErrorFromPosixError(tErrno, SQLITE_IOERR_RDLOCK);
#else
          rc = SQLITE_IOERR_UNLOCK;
#endif
          if( IS_LOCK_ERROR(rc) ){
            storeLastErrno(pFile, tErrno);
          }
          goto end_unlock;
        }
        lock.l_type = F_UNLCK;
        lock.l_whence = SEEK_SET;
        lock.l_start = SHARED_FIRST+divSize;
        lock.l_len = SHARED_SIZE-divSize;
................................................................................
          tErrno = errno;
#if OSLOCKING_CHECK_BUSY_IOERR
          rc = sqliteErrorFromPosixError(tErrno, SQLITE_IOERR_UNLOCK);
#else
          rc = SQLITE_IOERR_UNLOCK;
#endif
          if( IS_LOCK_ERROR(rc) ){
            storeLastErrno(pFile, tErrno);
          }
          goto end_unlock;
        }
      }else
#endif /* defined(__APPLE__) && SQLITE_ENABLE_LOCKING_STYLE */
      {
        lock.l_type = F_RDLCK;
................................................................................
          /* In theory, the call to unixFileLock() cannot fail because another
          ** process is holding an incompatible lock. If it does, this 
          ** indicates that the other process is not following the locking
          ** protocol. If this happens, return SQLITE_IOERR_RDLOCK. Returning
          ** SQLITE_BUSY would confuse the upper layer (in practice it causes 
          ** an assert to fail). */ 
          rc = SQLITE_IOERR_RDLOCK;
          storeLastErrno(pFile, tErrno);
#endif
          if( IS_LOCK_ERROR(rc) ){
            storeLastErrno(pFile, tErrno);
          }
          goto end_unlock;
        }
      }
    }
    lock.l_type = F_UNLCK;
    lock.l_whence = SEEK_SET;
................................................................................
    if( unixFileLock(pFile, &lock, 10)==0 ){
      pInode->eFileLock = SHARED_LOCK;
    }else{
#if OSLOCKING_CHECK_BUSY_IOERR
      tErrno = errno;
      rc = sqliteErrorFromPosixError(tErrno, SQLITE_IOERR_UNLOCK);
      if( IS_LOCK_ERROR(rc) ){
        storeLastErrno(pFile, tErrno);
      }
#else
      rc = SQLITE_IOERR_UNLOCK;
      storeLastErrno(pFile, errno);
#endif
      goto end_unlock;
    }
  }
  if( eFileLock==NO_LOCK ){
    /* Decrement the shared lock counter.  Release the lock using an
    ** OS call only when all threads in this same process have released
................................................................................
      if( unixFileLock(pFile, &lock, 10)==0 ){
        pInode->eFileLock = NO_LOCK;
      }else{
#if OSLOCKING_CHECK_BUSY_IOERR
        tErrno = errno;
        rc = sqliteErrorFromPosixError(tErrno, SQLITE_IOERR_UNLOCK);
        if( IS_LOCK_ERROR(rc) ){
          storeLastErrno(pFile, tErrno);
        }
#else
        rc = SQLITE_IOERR_UNLOCK;
	    storeLastErrno(pFile, errno);
#endif
        pInode->eFileLock = NO_LOCK;
        pFile->eFileLock = NO_LOCK;
      }
    }

    /* Decrement the count of locks against this same file.  When the
................................................................................
*/
static int closeUnixFile(sqlite3_file *id){
  unixFile *pFile = (unixFile*)id;
#if OSCLOSE_CHECK_CLOSE_IOERR
  if( pFile->h>=0 ){
    int err = close(pFile->h);
    if( err ){
      storeLastErrno(pFile, errno);
      return SQLITE_IOERR_CLOSE;
    }else{
      pFile->h=-1;
    }
  }
#else
  if( pFile->h>=0 ){
................................................................................
    /* failed to open/create the lock directory */
    int tErrno = errno;
    if( EEXIST == tErrno ){
      rc = SQLITE_BUSY;
    } else {
      rc = sqliteErrorFromPosixError(tErrno, SQLITE_IOERR_LOCK);
      if( IS_LOCK_ERROR(rc) ){
        storeLastErrno(pFile, tErrno);
      }
    }
    return rc;
  } 
  
  /* got it, set the type and return ok */
  pFile->eFileLock = eFileLock;
................................................................................
#if OSLOCKING_CHECK_BUSY_IOERR
      rc = sqliteErrorFromPosixError(tErrno, SQLITE_IOERR_UNLOCK);
#else
      rc = SQLITE_IOERR_UNLOCK;
#endif
    }
    if( IS_LOCK_ERROR(rc) ){
      storeLastErrno(pFile, tErrno);
    }
    return rc; 
  }
  pFile->eFileLock = NO_LOCK;
  return SQLITE_OK;
}

................................................................................
        /* unlock failed with an error */
#if OSLOCKING_CHECK_BUSY_IOERR
        lrc = sqliteErrorFromPosixError(tErrno, SQLITE_IOERR_UNLOCK);
#else 
        lrc = SQLITE_IOERR_UNLOCK; 
#endif
        if( IS_LOCK_ERROR(lrc) ){
          storeLastErrno(pFile, tErrno);
          rc = lrc;
        }
      }
    } else {
      int tErrno = errno;
      reserved = 1;
      /* someone else might have it reserved */
      lrc = sqliteErrorFromPosixError(tErrno, SQLITE_IOERR_LOCK); 
      if( IS_LOCK_ERROR(lrc) ){
        storeLastErrno(pFile, tErrno);
        rc = lrc;
      }
    }
  }
  OSTRACE(("TEST WR-LOCK %d %d %d (flock)\n", pFile->h, rc, reserved));

#ifdef SQLITE_IGNORE_FLOCK_LOCK_ERRORS
................................................................................
  /* grab an exclusive lock */
  
  if (robust_flock(pFile->h, LOCK_EX | LOCK_NB)) {
    int tErrno = errno;
    /* didn't get, must be busy */
    rc = sqliteErrorFromPosixError(tErrno, SQLITE_IOERR_LOCK);
    if( IS_LOCK_ERROR(rc) ){
      storeLastErrno(pFile, tErrno);
    }
  } else {
    /* got it, set the type and return ok */
    pFile->eFileLock = eFileLock;
  }
  OSTRACE(("LOCK    %d %s %s (flock)\n", pFile->h, azFileLock(eFileLock), 
           rc==SQLITE_OK ? "ok" : "failed"));
................................................................................
    sem_t *pSem = pFile->pInode->pSem;
    struct stat statBuf;

    if( sem_trywait(pSem)==-1 ){
      int tErrno = errno;
      if( EAGAIN != tErrno ){
        rc = sqliteErrorFromPosixError(tErrno, SQLITE_IOERR_CHECKRESERVEDLOCK);
        storeLastErrno(pFile, tErrno);
      } else {
        /* someone else has the lock when we are in NO_LOCK */
        reserved = (pFile->eFileLock < SHARED_LOCK);
      }
    }else{
      /* we could have it if we want it */
      sem_post(pSem);
................................................................................
  }
  
  /* no, really unlock. */
  if ( sem_post(pSem)==-1 ) {
    int rc, tErrno = errno;
    rc = sqliteErrorFromPosixError(tErrno, SQLITE_IOERR_UNLOCK);
    if( IS_LOCK_ERROR(rc) ){
      storeLastErrno(pFile, tErrno);
    }
    return rc; 
  }
  pFile->eFileLock = NO_LOCK;
  return SQLITE_OK;
}

................................................................................
#ifdef SQLITE_IGNORE_AFP_LOCK_ERRORS
    rc = SQLITE_BUSY;
#else
    rc = sqliteErrorFromPosixError(tErrno,
                    setLockFlag ? SQLITE_IOERR_LOCK : SQLITE_IOERR_UNLOCK);
#endif /* SQLITE_IGNORE_AFP_LOCK_ERRORS */
    if( IS_LOCK_ERROR(rc) ){
      storeLastErrno(pFile, tErrno);
    }
    return rc;
  } else {
    return SQLITE_OK;
  }
}

................................................................................
    if( IS_LOCK_ERROR(lrc1) ){
      lrc1Errno = pFile->lastErrno;
    }
    /* Drop the temporary PENDING lock */
    lrc2 = afpSetLock(context->dbPath, pFile, PENDING_BYTE, 1, 0);
    
    if( IS_LOCK_ERROR(lrc1) ) {
      storeLastErrno(pFile, lrc1Errno);
      rc = lrc1;
      goto afp_end_lock;
    } else if( IS_LOCK_ERROR(lrc2) ){
      rc = lrc2;
      goto afp_end_lock;
    } else if( lrc1 != SQLITE_OK ) {
      rc = lrc1;
................................................................................
    got = osPread64(id->h, pBuf, cnt, offset);
    SimulateIOError( got = -1 );
#else
    newOffset = lseek(id->h, offset, SEEK_SET);
    SimulateIOError( newOffset-- );
    if( newOffset!=offset ){
      if( newOffset == -1 ){
        storeLastErrno((unixFile*)id, errno);
      }else{
        storeLastErrno((unixFile*)id, 0);
      }
      return -1;
    }
    got = osRead(id->h, pBuf, cnt);
#endif
    if( got==cnt ) break;
    if( got<0 ){
      if( errno==EINTR ){ got = 1; continue; }
      prior = 0;
      storeLastErrno((unixFile*)id, errno);
      break;
    }else if( got>0 ){
      cnt -= got;
      offset += got;
      prior += got;
      pBuf = (void*)(got + (char*)pBuf);
    }
................................................................................
  got = seekAndRead(pFile, offset, pBuf, amt);
  if( got==amt ){
    return SQLITE_OK;
  }else if( got<0 ){
    /* lastErrno set by seekAndRead */
    return SQLITE_IOERR_READ;
  }else{
    //storeLastErrno(pFile, 0); /* not a system error, but we want to preserve lastErrno */
    /* Unread parts of the buffer must be zero-filled */
    memset(&((char*)pBuf)[got], 0, amt-got);
    return SQLITE_IOERR_SHORT_READ;
  }
}

/*
................................................................................
  do{ got = osPwrite64(id->h, pBuf, cnt, offset);}while( got<0 && errno==EINTR);
#else
  do{
    newOffset = lseek(id->h, offset, SEEK_SET);
    SimulateIOError( newOffset-- );
    if( newOffset!=offset ){
      if( newOffset == -1 ){
        storeLastErrno((unixFile*)id, errno);
      }else{
        storeLastErrno((unixFile*)id, 0);
      }
      return -1;
    }
    got = osWrite(id->h, pBuf, cnt);
  }while( got<0 && errno==EINTR );
#endif
  TIMER_END;
  if( got<0 ){
    storeLastErrno((unixFile*)id, errno);
  }

  OSTRACE(("WRITE   %-3d %5d %7lld %llu\n", id->h, got, offset, TIMER_ELAPSED));
  return got;
}


................................................................................
  SimulateDiskfullError(( wrote=0, amt=1 ));

  if( amt>0 ){
    if( wrote<0 && pFile->lastErrno!=ENOSPC ){
      /* lastErrno set by seekAndWrite */
      return SQLITE_IOERR_WRITE;
    }else{
      //storeLastErrno(pFile, 0); /* not a system error, but we want to preserve lastErrno */
      return SQLITE_FULL;
    }
  }

  return SQLITE_OK;
}

................................................................................
  SimulateDiskfullError( return SQLITE_FULL );

  assert( pFile );
  OSTRACE(("SYNC    %-3d\n", pFile->h));
  rc = full_fsync(pFile->h, isFullsync, isDataOnly);
  SimulateIOError( rc=1 );
  if( rc ){
    storeLastErrno(pFile, errno);
    return unixLogError(SQLITE_IOERR_FSYNC, "full_fsync", pFile->zPath);
  }

  /* Also fsync the directory containing the file if the DIRSYNC flag
  ** is set.  This is a one-time occurrance.  Many systems (examples: AIX)
  ** are unable to fsync a directory, so ignore errors on the fsync.
  */
................................................................................
    OSTRACE(("DIRSYNC %s (have_fullfsync=%d fullsync=%d)\n", pFile->zPath,
            HAVE_FULLFSYNC, isFullsync));
    rc = osOpenDirectory(pFile->zPath, &dirfd);
    if( rc==SQLITE_OK && dirfd>=0 ){
      full_fsync(dirfd, 0, 0);
#if OSCLOSE_CHECK_CLOSE_IOERR
      if( close(pFile->dirfd) ){
        storeLastErrno(pFile, errno);
        rc = SQLITE_IOERR_DIR_CLOSE;
      }
#else
      robust_close(pFile, dirfd, __LINE__);
#endif
    }else if( rc==SQLITE_CANTOPEN ){
      rc = SQLITE_OK;
................................................................................
  */
  if( pFile->szChunk>0 ){
    nByte = ((nByte + pFile->szChunk - 1)/pFile->szChunk) * pFile->szChunk;
  }

  rc = robust_ftruncate(pFile->h, (off_t)nByte);
  if( rc ){
    storeLastErrno(pFile, errno);
    return unixLogError(SQLITE_IOERR_TRUNCATE, "ftruncate", pFile->zPath);
  }else{
#ifndef NDEBUG
    /* If we are doing a normal write to a database file (as opposed to
    ** doing a hot-journal rollback or a write to some file other than a
    ** normal database file) and we truncate the file to zero length,
    ** that effectively updates the change counter.  This might happen
................................................................................
static int unixFileSize(sqlite3_file *id, i64 *pSize){
  int rc;
  struct stat buf;
  assert( id );
  rc = osFstat(((unixFile*)id)->h, &buf);
  SimulateIOError( rc=1 );
  if( rc!=0 ){
    storeLastErrno((unixFile*)id, errno);
    return SQLITE_IOERR_FSTAT;
  }
  *pSize = buf.st_size;

  /* When opening a zero-size database, the findInodeInfo() procedure
  ** writes a single byte into that file in order to work around a bug
  ** in the OS-X msdos filesystem.  In order to avoid problems with upper
................................................................................
      ** is the same technique used by glibc to implement posix_fallocate()
      ** on systems that do not have a real fallocate() system call.
      */
      int nBlk = buf.st_blksize;  /* File-system block size */
      i64 iWrite;                 /* Next offset to write to */

      if( robust_ftruncate(pFile->h, nSize) ){
        storeLastErrno(pFile, errno);
        return unixLogError(SQLITE_IOERR_TRUNCATE, "ftruncate", pFile->zPath);
      }
      iWrite = ((buf.st_size + 2*nBlk - 1)/nBlk)*nBlk-1;
      while( iWrite<nSize ){
        int nWrite = seekAndWrite(pFile, iWrite, "", 1);
        if( nWrite!=1 ) return SQLITE_IOERR_WRITE;
        iWrite += nBlk;
................................................................................
    pSrcPager = sqlite3BtreePager(pSrcBtree);
    assert( pSrcPager!=0 );
    src_file = sqlite3PagerFile(pSrcPager);
    assert( src_file!=0 );
    if( src_file->pMethods ){
      int srcFlags = 0;
      pSrcFile = (unixFile *)src_file;
#if SQLITE_ENABLE_LOCKING_STYLE || defined(__APPLE__)
      if ((pSrcFile->openFlags & O_RDWR) == O_RDWR) {
        srcFlags = SQLITE_OPEN_READWRITE;
      } else {
        srcFlags = SQLITE_OPEN_READONLY;
      }
#else
      srcFlags = SQLITE_OPEN_READWRITE;
#endif
#if SQLITE_ENABLE_DATA_PROTECTION
      srcFlags |= pSrcFile->protFlags;
#endif
#if SQLITE_ENABLE_LOCKING_STYLE
      if( isProxyLockingMode(pSrcFile) ){
        srcFlags |= SQLITE_OPEN_AUTOPROXY;
      }
................................................................................
      if( fcopyfile(srcWalFD, dstWalFD, s, COPYFILE_ALL) ){
        int err=errno;
        switch(err) {
          case ENOMEM:
            rc = SQLITE_NOMEM;
            break;
          default:
            storeLastErrno(pFile, err);
            rc = SQLITE_IOERR;
        }
      }
      copyfile_state_free(s);
      close(dstWalFD);
    }
    close(srcWalFD);
................................................................................
    if( fcopyfile(pSrcFile->h, pFile->h, s, COPYFILE_ALL) ){
      int err=errno;
      switch(err) {
        case ENOMEM:
          rc = SQLITE_NOMEM;
          break;
        default:
          storeLastErrno(pFile, err);
          rc = SQLITE_IOERR;
      }
    }
    copyfile_state_free(s);
    
    if (srcChange == dstChange) {
      /* modify the change counter to force page zero to be reloaded */
................................................................................
    if( pShmNode->mutex==0 ){
      rc = SQLITE_NOMEM;
      goto shm_open_err;
    }

    if( pInode->bProcessLock==0 ){
      int openFlags = O_RDWR | O_CREAT;
      if( sqlite3_uri_boolean(pDbFd->zPath, "readonly_shm", 0)
#if defined(SQLITE_ENABLE_PERSIST_WAL)&&(SQLITE_ENABLE_LOCKING_STYLE \
    || defined(__APPLE__))
         || (pDbFd->openFlags & O_RDWR) != O_RDWR
#endif
         ){
        openFlags = O_RDONLY;
        pShmNode->isReadonly = 1;
      }
      pShmNode->h = robust_open(zShmFilename, openFlags, (sStat.st_mode&0777));
      if( pShmNode->h<0 ){
        rc = unixLogError(SQLITE_CANTOPEN_BKPT, "open", zShmFilename);
        goto shm_open_err;
................................................................................
          close(jfd);
        }
      }
    }
  }
  return SQLITE_OK;
}

static int unixUnsafeTruncateDatabase(unixFile *pFile){
  // this is nasty & bad.  destruction with prejudice.  we'll lose all the file locks in this process, however.
  // sqlite3_file_control works properly.  But if it fails, this works approximately
  char journalPath[MAXPATHLEN];
  char walPath[MAXPATHLEN];
  int rc = SQLITE_OK;
  
  strlcpy(journalPath, pFile->zPath, MAXPATHLEN);
  strlcat(journalPath, "-journal", MAXPATHLEN);
  strlcpy(walPath, pFile->zPath, MAXPATHLEN);
  strlcat(walPath, "-wal", MAXPATHLEN);
  int fd1 = pFile->h;
  int result = 0;
  result = ftruncate(fd1, 0ll);
  if (result) {
    result = errno;
  }
  if (result) {
    rc = SQLITE_IOERR;
    storeLastErrno(pFile, result);
  }
  
  int fd2 = open(journalPath, O_RDWR);
  int result2 = 0;
  if (fd2 < 0) {
    if (errno != ENOENT) {
      result2 = errno;
    } else {
      result2 = 0;
    }
  } else {
    result2 = ftruncate(fd2, 0ll);
    if (result2) {
      result2 = errno;
    }
  }
  if (result2 && !result) {
    rc = SQLITE_IOERR;
    storeLastErrno(pFile, result2);
  }
  
  int fd3 = open(walPath, O_RDWR);
  int result3 = 0;
  if (fd3 < 0) {
    if (errno != ENOENT) {
      result3 = errno;
    } else {
      result3 = 0;
    }
  } else {
    result3 = ftruncate(fd3, 0ll);
    if (result3) {
      result3 = errno;
    }
  }
  if (result3 && !(result || result2)) {
    rc = SQLITE_IOERR;
    storeLastErrno(pFile, result2);
  }
  
  if (fd3 >= 0) {
    fsync(fd3);
    close(fd3);
  }
  if (fd2 >= 0) {
    fsync(fd2);
    close(fd2);
  }
  fsync(fd1);
	
  return rc;
}

static int unixTruncateDatabase(unixFile *pFile, int bFlags) {
  sqlite3_file *id = (sqlite3_file *)pFile;
  int rc = SQLITE_OK;
  void *pLock = NULL;
  int flags = 0;
  int corruptFileLock = 0;
  int isCorrupt = 0;
  int force = (bFlags & SQLITE_TRUNCATE_FORCE);
  
#if SQLITE_ENABLE_DATA_PROTECTION
  flags |= pFile->protFlags;
#endif
#if SQLITE_ENABLE_LOCKING_STYLE
  if( isProxyLockingMode(pFile) ){
    flags |= SQLITE_OPEN_AUTOPROXY;
  }
................................................................................
  
  rc = sqlite3demo_superlock(pFile->zPath, 0, flags, 0, 0, &pLock);
  if( rc ){
    if( rc==SQLITE_CORRUPT || rc==SQLITE_NOTADB ){
      isCorrupt = 1;
      rc = sqlite3demo_superlock_corrupt(id, SQLITE_LOCK_EXCLUSIVE, &corruptFileLock);
    }
    if( rc && !force ){
      return rc;
    }
  }
  if( (bFlags&SQLITE_TRUNCATE_INITIALIZE_HEADER_MASK)!=0 ){
    /* initialize a new database in TMPDIR and copy the contents over */
    const char *tDir = unixTempFileDir();
    int tLen = sizeof(char) * (strlen(tDir) + 11);
    char *tDbPath = (char *)malloc(tLen);
    int tFd = -1;
    
    strlcpy(tDbPath, tDir, tLen);
    strlcat(tDbPath, "tmpdbXXXXX", tLen);
    tFd = mkstemp(tDbPath);
    if( tFd==-1 ){
      storeLastErrno(pFile, errno);
      rc = SQLITE_IOERR;
      if( force ){
        /* attempt the truncation, even if we can't seed the database in a temp directory */
        rc = pFile->pMethod->xTruncate(id, ((pFile->fsFlags & SQLITE_FSFLAGS_IS_MSDOS) != 0) ? 1L : 0L);
      }
    }else{
      sqlite3 *tDb = NULL;
      copyfile_state_t s;
      int trc = sqlite3_open_v2(tDbPath, &tDb, SQLITE_OPEN_CREATE | SQLITE_OPEN_READWRITE | SQLITE_OPEN_AUTOPROXY, NULL);
      char *errmsg = NULL;
      const char *sql = "";
      if( !trc && (bFlags&SQLITE_TRUNCATE_PAGESIZE_MASK) ){
................................................................................
        if( !tDb ){
          fprintf(stderr, "failed to open temp database '%s' to reset truncated database %s with flags %x: %d\n", tDbPath, pFile->zPath, bFlags, trc);
        }else{
          fprintf(stderr, "failed to set '%s' on truncated database %s, %d: %s\n", sql, pFile->zPath, trc, errmsg);
        }
      }
      if( tDb ){
        int off = 0;
        /* merge the wal into the db */
        sqlite3_file_control(tDb, NULL, SQLITE_FCNTL_PERSIST_WAL, &off);
        sqlite3_close(tDb);
      }
      s = copyfile_state_alloc();
      lseek(tFd, 0, SEEK_SET);
      lseek(pFile->h, 0, SEEK_SET);
      if( fcopyfile(tFd, pFile->h, s, COPYFILE_ALL) ){
        int err=errno;
        switch(err) {
          case ENOMEM:
            rc = SQLITE_NOMEM;
            break;
          default:
            storeLastErrno(pFile, err);
            rc = SQLITE_IOERR;
        }
      }
      copyfile_state_free(s);
      fsync(pFile->h);
      close(tFd);
      unlink(tDbPath);
    }
    free(tDbPath);
  } else {
    rc = pFile->pMethod->xTruncate(id, ((pFile->fsFlags & SQLITE_FSFLAGS_IS_MSDOS) != 0) ? 1L : 0L);
  }
  if( rc==SQLITE_OK || force ){
    unixInvalidateSupportFiles(pFile, 0);
  }
  pFile->pMethod->xSync(id, SQLITE_SYNC_FULL);


  if( isCorrupt ){
    sqlite3demo_superunlock_corrupt(id, corruptFileLock);
  }else if( pLock ){
    sqlite3demo_superunlock(pLock);
  }else{
    assert(force);
  }
  
  if( rc!=SQLITE_OK && force){
    unixUnsafeTruncateDatabase(pFile);
  }
  
  return rc;
}

/*
 ** Lock locations for shared-memory locks used by WAL mode.
 */
#ifndef SHM_BASE
................................................................................
** This test only works for lock testing on unix/posix VFS.
** Adapted from tool/getlock.c f4c39b651370156cae979501a7b156bdba50e7ce
*/
static int unixLockstatePid(unixFile *pFile, pid_t pid, int *pLockstate){
  int hDb;        /* File descriptor for the open database file */
  int hShm = -1;  /* File descriptor for WAL shared-memory file */
  ssize_t got;    /* Bytes read from header */
  int isWal = 0;             /* True if in WAL mode */
  int nLock = 0;             /* Number of locks held */
  int noHdr = 0;             /* Zero byte DB has no header */
  unsigned char aHdr[100];   /* Database header */
  
  assert(pLockstate);
  
  /* make sure we are dealing with a database file */
  hDb = pFile->h;
  if( hDb<0 ){
................................................................................
  }
  assert( (strlen(SQLITE_FILE_HEADER)+1)==SQLITE_FILE_HEADER_LEN );
  got = pread(hDb, aHdr, 100, 0);
  if( got<0 ){
    *pLockstate = SQLITE_LOCKSTATE_ERROR;
    return SQLITE_ERROR;
  }
  if( got==0 ){
    noHdr = 1;
  }else if( got!=100 || memcmp(aHdr, SQLITE_FILE_HEADER, SQLITE_FILE_HEADER_LEN)!=0 ){
    *pLockstate = SQLITE_LOCKSTATE_NOTADB;
    return SQLITE_NOTADB;
  }
  
  /* First check for an exclusive lock */
  nLock += unixIsLocked(pid, hDb, F_RDLCK, SHARED_FIRST, SHARED_SIZE, "EXCLUSIVE");
  if (!noHdr) {
    isWal = aHdr[18]==2;
  }
  if( nLock==0 && isWal==0 ){
    /* Rollback mode */
    nLock += unixIsLocked(pid, hDb, F_WRLCK, PENDING_BYTE, SHARED_SIZE+2, "PENDING|RESERVED|SHARED");
  }
  if( nLock==0 && isWal!=0 ){
    /* lookup the file descriptor for the shared memory file if we have it open in this process */
    unixEnterMutex(); /* Because pFile->pInode is shared across threads */
................................................................................
  if( isDelete ){
#if OS_VXWORKS
    zPath = zName;
#else
    osUnlink(zName);
#endif
  }
#if SQLITE_ENABLE_LOCKING_STYLE || defined(__APPLE__)
  else{
    p->openFlags = openFlags;
  }
#endif

  noLock = eType!=SQLITE_OPEN_MAIN_DB;

  
#if defined(__APPLE__) || SQLITE_ENABLE_LOCKING_STYLE
  if( fstatfs(fd, &fsInfo) == -1 ){
    storeLastErrno(p, errno);
    robust_close(p, fd, __LINE__);
    return SQLITE_IOERR_ACCESS;
  }
  if (0 == strncmp("msdos", fsInfo.f_fstypename, 5)) {
    ((unixFile*)pFile)->fsFlags |= SQLITE_FSFLAGS_IS_MSDOS;
  }
  if (0 == strncmp("exfat", fsInfo.f_fstypename, 5)) {
................................................................................

  /* Set up appropriate ctrlFlags */
  if( isDelete )                ctrlFlags |= UNIXFILE_DELETE;
  if( isReadonly )              ctrlFlags |= UNIXFILE_RDONLY;
  if( noLock )                  ctrlFlags |= UNIXFILE_NOLOCK;
  if( syncDir )                 ctrlFlags |= UNIXFILE_DIRSYNC;
  if( flags & SQLITE_OPEN_URI ) ctrlFlags |= UNIXFILE_URI;
#if defined(SQLITE_ENABLE_PERSIST_WAL)
  if( eType==SQLITE_OPEN_MAIN_DB ) {
    ctrlFlags |= UNIXFILE_PERSIST_WAL;
  }
#endif

#if SQLITE_ENABLE_LOCKING_STYLE
#if SQLITE_PREFER_PROXY_LOCKING
  isAutoProxy = 1;
#endif
  if( isAutoProxy && (zPath!=NULL) && (!noLock) && pVfs->xOpen ){
    char *envforce = getenv("SQLITE_FORCE_PROXY_LOCKING");
................................................................................
       * 1st try: get the mod time of the conch, wait 0.5s and try again. 
       * 2nd try: fail if the mod time changed or host id is different, wait 
       *           10 sec and try again
       * 3rd try: break the lock unless the mod time has changed.
       */
      struct stat buf;
      if( osFstat(conchFile->h, &buf) ){
        storeLastErrno(pFile, errno);
        return SQLITE_IOERR_LOCK;
      }
      
      if( pCtx->nFails==1 ){
        conchModTime = buf.st_mtimespec;
        usleep(500000); /* wait 0.5 sec and try the lock again*/
        continue;  
................................................................................
        return SQLITE_BUSY;
      }
      
      if( pCtx->nFails==2 ){  
        char tBuf[PROXY_MAXCONCHLEN];
        int len = osPread(conchFile->h, tBuf, PROXY_MAXCONCHLEN, 0);
        if( len<0 ){
          storeLastErrno(pFile, errno);
          return SQLITE_IOERR_LOCK;
        }
        if( len>PROXY_PATHINDEX && tBuf[0]==(char)PROXY_CONCHVERSION){
          /* don't break the lock if the host id doesn't match, but do log
           * an error to console so users can diagnose stale NFS locks more 
           * easily 
           */
................................................................................
    int forceNewLockPath = 0;
    
    OSTRACE(("TAKECONCH  %d for %s pid=%d\n", conchFile->h,
             (pCtx->lockProxyPath ? pCtx->lockProxyPath : ":auto:"), getpid()));

    rc = proxyGetHostID(myHostID, &pError);
    if( (rc&0xff)==SQLITE_IOERR ){
      storeLastErrno(pFile, pError);
      goto end_takeconch;
    }
    rc = proxyConchLock(pFile, myHostID, SHARED_LOCK);
    if( rc!=SQLITE_OK ){
      goto end_takeconch;
    }
    /* read the existing conch file */
    readLen = seekAndRead((unixFile*)conchFile, 0, readBuf, PROXY_MAXCONCHLEN);
    if( readLen<0 ){
      /* I/O error: lastErrno set by seekAndRead */
      storeLastErrno(pFile, conchFile->lastErrno);
      rc = SQLITE_IOERR_READ;
      goto end_takeconch;
    }else if( readLen<=(PROXY_HEADERLEN+PROXY_HOSTIDLEN) || 
             readBuf[0]!=(char)PROXY_CONCHVERSION ){
      /* a short read or version format mismatch means we need to create a new 
      ** conch file. 
      */
................................................................................
    end_takeconch:
      OSTRACE(("TRANSPROXY: CLOSE  %d\n", pFile->h));
      if( rc==SQLITE_OK && pFile->openFlags ){
        int fd;
        if( pFile->h>=0 ){
#if defined(STRICT_CLOSE_ERROR) && OSCLOSE_CHECK_CLOSE_IOERR
          if( close(pFile->h) ){
            storeLastErrno(pFile, errno);
            return SQLITE_IOERR_CLOSE;
          }
#else
          robust_close(pFile, pFile->h, __LINE__);
#endif
        }
        pFile->h = -1;

Changes to src/pager.c.

6338
6339
6340
6341
6342
6343
6344









6345
6346
6347
6348
6349
6350
6351
** Return the file handle for the database file associated
** with the pager.  This might return NULL if the file has
** not yet been opened.
*/
sqlite3_file *sqlite3PagerFile(Pager *pPager){
  return pPager->fd;
}










/*
** Return the full pathname of the journal file.
*/
const char *sqlite3PagerJournalname(Pager *pPager){
  return pPager->zJournal;
}







>
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>







6338
6339
6340
6341
6342
6343
6344
6345
6346
6347
6348
6349
6350
6351
6352
6353
6354
6355
6356
6357
6358
6359
6360
** Return the file handle for the database file associated
** with the pager.  This might return NULL if the file has
** not yet been opened.
*/
sqlite3_file *sqlite3PagerFile(Pager *pPager){
  return pPager->fd;
}

/*
 ** Return the file handle for the WAL journal file associated
 ** with the pager.  This might return NULL if the file has
 ** not yet been opened.
 */
sqlite3_file *sqlite3PagerWalFile(Pager *pPager){
  return ((pPager->pWal) ? sqlite3WalFile(pPager->pWal) : (NULL));
}

/*
** Return the full pathname of the journal file.
*/
const char *sqlite3PagerJournalname(Pager *pPager){
  return pPager->zJournal;
}

Changes to src/pager.h.

150
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152
153
154
155
156

157
158
159
160
161
162
163
/* Functions used to query pager state and configuration. */
u8 sqlite3PagerIsreadonly(Pager*);
int sqlite3PagerRefcount(Pager*);
int sqlite3PagerMemUsed(Pager*);
const char *sqlite3PagerFilename(Pager*);
const sqlite3_vfs *sqlite3PagerVfs(Pager*);
sqlite3_file *sqlite3PagerFile(Pager*);

const char *sqlite3PagerJournalname(Pager*);
int sqlite3PagerNosync(Pager*);
void *sqlite3PagerTempSpace(Pager*);
int sqlite3PagerIsMemdb(Pager*);
void sqlite3PagerCacheStat(Pager *, int, int, int *);
void sqlite3PagerClearCache(Pager *);








>







150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
/* Functions used to query pager state and configuration. */
u8 sqlite3PagerIsreadonly(Pager*);
int sqlite3PagerRefcount(Pager*);
int sqlite3PagerMemUsed(Pager*);
const char *sqlite3PagerFilename(Pager*);
const sqlite3_vfs *sqlite3PagerVfs(Pager*);
sqlite3_file *sqlite3PagerFile(Pager*);
sqlite3_file *sqlite3PagerWalFile(Pager *pPager);
const char *sqlite3PagerJournalname(Pager*);
int sqlite3PagerNosync(Pager*);
void *sqlite3PagerTempSpace(Pager*);
int sqlite3PagerIsMemdb(Pager*);
void sqlite3PagerCacheStat(Pager *, int, int, int *);
void sqlite3PagerClearCache(Pager *);

Changes to src/sqlite3_private.h.

45
46
47
48
49
50
51

52
53
54
55
56
57
58
59
60
61

62
63
64
65
66
67
68
69
70
71
** behavior is applied and the database file is truncated to zero bytes, a rollback 
** journal (if present) is unlinked, a WAL journal (if present) is truncated to zero 
** bytes and the first few bytes of the -shm file is scrambled to trigger existing
** connections to rebuild the index from the database file contents.
*/
#define SQLITE_FCNTL_TRUNCATE_DATABASE      101
#define SQLITE_TRUNCATE_DATABASE            SQLITE_FCNTL_TRUNCATE_DATABASE

#define SQLITE_TRUNCATE_JOURNALMODE_WAL           (0x1<<0)
#define SQLITE_TRUNCATE_AUTOVACUUM_MASK           (0x3<<2)
#define SQLITE_TRUNCATE_AUTOVACUUM_OFF            (0x1<<2)
#define SQLITE_TRUNCATE_AUTOVACUUM_FULL           (0x2<<2)
#define SQLITE_TRUNCATE_AUTOVACUUM_INCREMENTAL    (0x3<<2)
#define SQLITE_TRUNCATE_PAGESIZE_MASK             (0x7<<4)
#define SQLITE_TRUNCATE_PAGESIZE_1024             (0x1<<4)
#define SQLITE_TRUNCATE_PAGESIZE_2048             (0x2<<4)
#define SQLITE_TRUNCATE_PAGESIZE_4096             (0x3<<4)
#define SQLITE_TRUNCATE_PAGESIZE_8192             (0x4<<4)


/*
** Pass the SQLITE_REPLACE_DATABASE operation code to sqlite3_file_control() 
** and a sqlite3 pointer to another open database file to safely copy the 
** contents of that database file into the receiving database.
*/
#define SQLITE_FCNTL_REPLACE_DATABASE       102
#define SQLITE_REPLACE_DATABASE             SQLITE_FCNTL_REPLACE_DATABASE

#endif







>










>


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45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
** behavior is applied and the database file is truncated to zero bytes, a rollback 
** journal (if present) is unlinked, a WAL journal (if present) is truncated to zero 
** bytes and the first few bytes of the -shm file is scrambled to trigger existing
** connections to rebuild the index from the database file contents.
*/
#define SQLITE_FCNTL_TRUNCATE_DATABASE      101
#define SQLITE_TRUNCATE_DATABASE            SQLITE_FCNTL_TRUNCATE_DATABASE
#define SQLITE_TRUNCATE_INITIALIZE_HEADER_MASK    (0x63<<0)
#define SQLITE_TRUNCATE_JOURNALMODE_WAL           (0x1<<0)
#define SQLITE_TRUNCATE_AUTOVACUUM_MASK           (0x3<<2)
#define SQLITE_TRUNCATE_AUTOVACUUM_OFF            (0x1<<2)
#define SQLITE_TRUNCATE_AUTOVACUUM_FULL           (0x2<<2)
#define SQLITE_TRUNCATE_AUTOVACUUM_INCREMENTAL    (0x3<<2)
#define SQLITE_TRUNCATE_PAGESIZE_MASK             (0x7<<4)
#define SQLITE_TRUNCATE_PAGESIZE_1024             (0x1<<4)
#define SQLITE_TRUNCATE_PAGESIZE_2048             (0x2<<4)
#define SQLITE_TRUNCATE_PAGESIZE_4096             (0x3<<4)
#define SQLITE_TRUNCATE_PAGESIZE_8192             (0x4<<4)
#define SQLITE_TRUNCATE_FORCE                     (0x1<<7)

/*
** Pass the SQLITE_REPLACE_DATABASE operation code to sqlite3_file_control()
** and a sqlite3 pointer to another open database file to safely copy the 
** contents of that database file into the receiving database.
*/
#define SQLITE_FCNTL_REPLACE_DATABASE       102
#define SQLITE_REPLACE_DATABASE             SQLITE_FCNTL_REPLACE_DATABASE

#endif

Changes to src/test_config.c.

457
458
459
460
461
462
463





464
465
466
467
468
469
470
471
472
473
474





475
476
477
478
479
480
481
  Tcl_SetVar2(interp,"sqlite_options","lock_proxy_pragmas","0",TCL_GLOBAL_ONLY);
#endif
#if defined(SQLITE_PREFER_PROXY_LOCKING) && defined(__APPLE__)
  Tcl_SetVar2(interp,"sqlite_options","prefer_proxy_locking","1",TCL_GLOBAL_ONLY);
#else
  Tcl_SetVar2(interp,"sqlite_options","prefer_proxy_locking","0",TCL_GLOBAL_ONLY);
#endif





#if SQLITE_DEFAULT_CKPTFULLFSYNC
  Tcl_SetVar2(interp,"sqlite_options","default_ckptfullfsync","1",TCL_GLOBAL_ONLY);
#else
  Tcl_SetVar2(interp,"sqlite_options","default_ckptfullfsync","0",TCL_GLOBAL_ONLY);
#endif
#if SQLITE_DEFAULT_WAL_SAFETYLEVEL
  Tcl_SetVar2(interp,"sqlite_options","default_wal_safetylevel",
              STRINGVALUE(SQLITE_DEFAULT_WAL_SAFETYLEVEL),TCL_GLOBAL_ONLY);
#else
  Tcl_SetVar2(interp,"sqlite_options","default_wal_safetylevel","0",TCL_GLOBAL_ONLY);
#endif





    
#ifdef SQLITE_OMIT_SHARED_CACHE
  Tcl_SetVar2(interp, "sqlite_options", "shared_cache", "0", TCL_GLOBAL_ONLY);
#else
  Tcl_SetVar2(interp, "sqlite_options", "shared_cache", "1", TCL_GLOBAL_ONLY);
#endif








>
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>











>
>
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>







457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
  Tcl_SetVar2(interp,"sqlite_options","lock_proxy_pragmas","0",TCL_GLOBAL_ONLY);
#endif
#if defined(SQLITE_PREFER_PROXY_LOCKING) && defined(__APPLE__)
  Tcl_SetVar2(interp,"sqlite_options","prefer_proxy_locking","1",TCL_GLOBAL_ONLY);
#else
  Tcl_SetVar2(interp,"sqlite_options","prefer_proxy_locking","0",TCL_GLOBAL_ONLY);
#endif
#if defined(SQLITE_ENABLE_PURGEABLE_PCACHE) && defined(__APPLE__)
  Tcl_SetVar2(interp,"sqlite_options","enable_purgeable_pcache","1",TCL_GLOBAL_ONLY);
#else
  Tcl_SetVar2(interp,"sqlite_options","enable_purgeable_pcache","0",TCL_GLOBAL_ONLY);
#endif
#if SQLITE_DEFAULT_CKPTFULLFSYNC
  Tcl_SetVar2(interp,"sqlite_options","default_ckptfullfsync","1",TCL_GLOBAL_ONLY);
#else
  Tcl_SetVar2(interp,"sqlite_options","default_ckptfullfsync","0",TCL_GLOBAL_ONLY);
#endif
#if SQLITE_DEFAULT_WAL_SAFETYLEVEL
  Tcl_SetVar2(interp,"sqlite_options","default_wal_safetylevel",
              STRINGVALUE(SQLITE_DEFAULT_WAL_SAFETYLEVEL),TCL_GLOBAL_ONLY);
#else
  Tcl_SetVar2(interp,"sqlite_options","default_wal_safetylevel","0",TCL_GLOBAL_ONLY);
#endif
#if SQLITE_ENABLE_PERSIST_WAL
  Tcl_SetVar2(interp,"sqlite_options","enable_persist_wal","1",TCL_GLOBAL_ONLY);
#else
  Tcl_SetVar2(interp,"sqlite_options","enable_persist_wal","0",TCL_GLOBAL_ONLY);
#endif
    
#ifdef SQLITE_OMIT_SHARED_CACHE
  Tcl_SetVar2(interp, "sqlite_options", "shared_cache", "0", TCL_GLOBAL_ONLY);
#else
  Tcl_SetVar2(interp, "sqlite_options", "shared_cache", "1", TCL_GLOBAL_ONLY);
#endif

Changes to src/wal.c.

2419
2420
2421
2422
2423
2424
2425









2426
2427
2428
2429
2430
2431
2432
Pgno sqlite3WalDbsize(Wal *pWal){
  if( pWal && ALWAYS(pWal->readLock>=0) ){
    return pWal->hdr.nPage;
  }
  return 0;
}











/* 
** This function starts a write transaction on the WAL.
**
** A read transaction must have already been started by a prior call
** to sqlite3WalBeginReadTransaction().
**







>
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2419
2420
2421
2422
2423
2424
2425
2426
2427
2428
2429
2430
2431
2432
2433
2434
2435
2436
2437
2438
2439
2440
2441
Pgno sqlite3WalDbsize(Wal *pWal){
  if( pWal && ALWAYS(pWal->readLock>=0) ){
    return pWal->hdr.nPage;
  }
  return 0;
}

/* 
 ** Return the file for this Wal journal (or zero, if unknown).
 */
sqlite3_file *sqlite3WalFile(Wal *pWal){
  if( pWal ){
    return pWal->pWalFd;
  }
  return 0;
}

/* 
** This function starts a write transaction on the WAL.
**
** A read transaction must have already been started by a prior call
** to sqlite3WalBeginReadTransaction().
**

Changes to src/wal.h.

72
73
74
75
76
77
78



79
80
81
82
83
84
85

/* Read a page from the write-ahead log, if it is present. */
int sqlite3WalRead(Wal *pWal, Pgno pgno, int *pInWal, int nOut, u8 *pOut);

/* If the WAL is not empty, return the size of the database. */
Pgno sqlite3WalDbsize(Wal *pWal);




/* Obtain or release the WRITER lock. */
int sqlite3WalBeginWriteTransaction(Wal *pWal);
int sqlite3WalEndWriteTransaction(Wal *pWal);

/* Undo any frames written (but not committed) to the log */
int sqlite3WalUndo(Wal *pWal, int (*xUndo)(void *, Pgno), void *pUndoCtx);








>
>
>







72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88

/* Read a page from the write-ahead log, if it is present. */
int sqlite3WalRead(Wal *pWal, Pgno pgno, int *pInWal, int nOut, u8 *pOut);

/* If the WAL is not empty, return the size of the database. */
Pgno sqlite3WalDbsize(Wal *pWal);

/* If a WAL journal file has been created, return it */
sqlite3_file *sqlite3WalFile(Wal *pWal);
  
/* Obtain or release the WRITER lock. */
int sqlite3WalBeginWriteTransaction(Wal *pWal);
int sqlite3WalEndWriteTransaction(Wal *pWal);

/* Undo any frames written (but not committed) to the log */
int sqlite3WalUndo(Wal *pWal, int (*xUndo)(void *, Pgno), void *pUndoCtx);

Changes to test/cache.test.

103
104
105
106
107
108
109


110
111
112
113
114


115

116
117
118
119
120
121
122
...
126
127
128
129
130
131
132


133

134
135
136


137

138
139
140
do_test cache-2.3.2 { pager_cache_size db } 2
do_execsql_test cache-2.3.3 {
    INSERT INTO t2 VALUES(1, 2);
    PRAGMA lock_status;
} {main exclusive temp closed}
do_test cache-2.3.4 { pager_cache_size db } 2
do_execsql_test cache-2.3.5 COMMIT


do_test cache-2.3.6 { pager_cache_size db } 1

do_execsql_test cache-2.3.7 {
  SELECT * FROM t1 UNION SELECT * FROM t2;
} {1 2 i j x y}


do_test cache-2.3.8 { pager_cache_size db } 1


# Tests for cache_size = 0.
#
do_execsql_test cache-2.4.1 {
  PRAGMA cache_size = 0;
  BEGIN;
    INSERT INTO t1 VALUES(1, 2);
................................................................................
do_execsql_test cache-2.4.3 {
    INSERT INTO t2 VALUES(1, 2);
    PRAGMA lock_status;
} {main exclusive temp closed}
do_test cache-2.4.4 { pager_cache_size db } 2
do_execsql_test cache-2.4.5 COMMIT



do_test cache-2.4.6 { pager_cache_size db } 0

do_execsql_test cache-2.4.7 {
  SELECT * FROM t1 UNION SELECT * FROM t2;
} {1 2 i j x y}


do_test cache-2.4.8 { pager_cache_size db } 0


sqlite3_soft_heap_limit $cmdlinearg(soft-heap-limit)
finish_test







>
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|



>
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>







 







>
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>



>
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>



103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
...
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
do_test cache-2.3.2 { pager_cache_size db } 2
do_execsql_test cache-2.3.3 {
    INSERT INTO t2 VALUES(1, 2);
    PRAGMA lock_status;
} {main exclusive temp closed}
do_test cache-2.3.4 { pager_cache_size db } 2
do_execsql_test cache-2.3.5 COMMIT
if !$::sqlite_options(enable_purgeable_pcache) {
  # purgeable pcache doesn't share cache between connections
  do_test cache-2.3.6 { pager_cache_size db } 1
}
do_execsql_test cache-2.3.7 {
  SELECT * FROM t1 UNION SELECT * FROM t2;
} {1 2 i j x y}
if !$::sqlite_options(enable_purgeable_pcache) {
  # purgeable pcache doesn't share cache between connections
  do_test cache-2.3.8 { pager_cache_size db } 1
}

# Tests for cache_size = 0.
#
do_execsql_test cache-2.4.1 {
  PRAGMA cache_size = 0;
  BEGIN;
    INSERT INTO t1 VALUES(1, 2);
................................................................................
do_execsql_test cache-2.4.3 {
    INSERT INTO t2 VALUES(1, 2);
    PRAGMA lock_status;
} {main exclusive temp closed}
do_test cache-2.4.4 { pager_cache_size db } 2
do_execsql_test cache-2.4.5 COMMIT

if !$::sqlite_options(enable_purgeable_pcache) {
  # purgeable pcache doesn't share cache between connections
  do_test cache-2.4.6 { pager_cache_size db } 0
}
do_execsql_test cache-2.4.7 {
  SELECT * FROM t1 UNION SELECT * FROM t2;
} {1 2 i j x y}
if !$::sqlite_options(enable_purgeable_pcache) {
  # purgeable pcache doesn't share cache between connections
  do_test cache-2.4.8 { pager_cache_size db } 0
}

sqlite3_soft_heap_limit $cmdlinearg(soft-heap-limit)
finish_test

Changes to test/dbstatus2.test.

34
35
36
37
38
39
40



41
42
43
44
45
46
47
}

proc db_write {db {reset 0}} {
  sqlite3_db_status $db CACHE_WRITE $reset
}

do_test 1.1 {



  db close
  sqlite3 db test.db
  expr {[file size test.db] / 1024}
} 6

do_test 1.2 {
  execsql { SELECT b FROM t1 WHERE a=2 }







>
>
>







34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
}

proc db_write {db {reset 0}} {
  sqlite3_db_status $db CACHE_WRITE $reset
}

do_test 1.1 {
  ifcapable enable_persist_wal {
    file_control_persist_wal db 0
  }
  db close
  sqlite3 db test.db
  expr {[file size test.db] / 1024}
} 6

do_test 1.2 {
  execsql { SELECT b FROM t1 WHERE a=2 }

Changes to test/fallocate.test.

77
78
79
80
81
82
83





84


85
86


87

88
89
90
91
92
93
94
}]
ifcapable !wal { set skipwaltests 1 }
if {![wal_is_ok]} { set skipwaltests 1 }

if {!$skipwaltests} {
  db close
  forcedelete test.db





  if {[forced_proxy_locking]} { file delete -force .test.db-conch }


  sqlite3 db test.db
  file_control_chunksize_test db main [expr 32*1024]


  

  do_test fallocate-2.1 {
    execsql {
      PRAGMA page_size = 1024;
      PRAGMA journal_mode = WAL;
      CREATE TABLE t1(a, b);
    }
    file size test.db







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77
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79
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87
88
89
90
91
92

93
94
95
96
97
98
99
100
101
102
103
}]
ifcapable !wal { set skipwaltests 1 }
if {![wal_is_ok]} { set skipwaltests 1 }

if {!$skipwaltests} {
  db close
  forcedelete test.db
  ifcapable enable_persist_wal {
    forcedelete test.db-journal
    forcedelete test.db-wal
    forcedelete test.db-shm
  }
  if {[forced_proxy_locking]} { 
    forcedelete .test.db-conch
  }
  sqlite3 db test.db

  ifcapable enable_persist_wal {
    file_control_persist_wal db 0
  }
  file_control_chunksize_test db main [expr 32*1024]
  do_test fallocate-2.1 {
    execsql {
      PRAGMA page_size = 1024;
      PRAGMA journal_mode = WAL;
      CREATE TABLE t1(a, b);
    }
    file size test.db

Changes to test/memsubsys1.test.

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101
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sqlite3_config_pagecache [expr 1024+$xtra_size] 20
sqlite3_initialize
reset_highwater_marks
build_test_db memsubsys1-2 {PRAGMA page_size=1024}
#show_memstats
set MEMORY_MANAGEMENT $sqlite_options(memorymanage)
ifcapable !malloc_usable_size {

 do_test memsubsys1-2.3 {
    set pg_ovfl [lindex [sqlite3_status SQLITE_STATUS_PAGECACHE_OVERFLOW 0] 2]
  } [expr ($TEMP_STORE>1 || $MEMORY_MANAGEMENT==0)*1024]

}
do_test memsubsys1-2.4 {
  set pg_used [lindex [sqlite3_status SQLITE_STATUS_PAGECACHE_USED 0] 2]
} 20
do_test memsubsys1-2.5 {
  set s_used [lindex [sqlite3_status SQLITE_STATUS_SCRATCH_USED 0] 2]
} 0
................................................................................
db close
sqlite3_shutdown
sqlite3_config_pagecache [expr 512+$xtra_size] 20
sqlite3_initialize
reset_highwater_marks
build_test_db memsubsys1-3.1 {PRAGMA page_size=1024}
#show_memstats

do_test memsubsys1-3.1.3 {
  set pg_used [lindex [sqlite3_status SQLITE_STATUS_PAGECACHE_USED 0] 2]
} 0
do_test memsubsys1-3.1.4 {
  set overflow [lindex [sqlite3_status SQLITE_STATUS_PAGECACHE_OVERFLOW 0] 2]
} $max_pagecache

do_test memsubsys1-3.1.5 {
  set s_used [lindex [sqlite3_status SQLITE_STATUS_SCRATCH_USED 0] 2]
} 0
db close
sqlite3_shutdown
sqlite3_config_pagecache [expr 2048+$xtra_size] 20
sqlite3_initialize
................................................................................
reset_highwater_marks
build_test_db memsubsys1-4 {PRAGMA page_size=1024}
#show_memstats
do_test memsubsys1-4.3 {
  set pg_used [lindex [sqlite3_status SQLITE_STATUS_PAGECACHE_USED 0] 2]
  expr {$pg_used>=45 && $pg_used<=50}
} 1

do_test memsubsys1-4.4 {
  set pg_ovfl [lindex [sqlite3_status SQLITE_STATUS_PAGECACHE_OVERFLOW 0] 2]
} 0

do_test memsubsys1-4.5 {
  set maxreq [lindex [sqlite3_status SQLITE_STATUS_MALLOC_SIZE 0] 2]
  expr {$maxreq<7000}
} 1
do_test memsubsys1-4.6 {
  set s_used [lindex [sqlite3_status SQLITE_STATUS_SCRATCH_USED 0] 2]
} 1
................................................................................
  PRAGMA temp_store=memory;
}
#show_memstats
do_test memsubsys1-7.3 {
  set pg_used [lindex [sqlite3_status SQLITE_STATUS_PAGECACHE_USED 0] 2]
  expr {$pg_used<24}
} 1

do_test memsubsys1-7.4 {
  set pg_ovfl [lindex [sqlite3_status SQLITE_STATUS_PAGECACHE_OVERFLOW 0] 2]
} 0
do_test memsubsys1-7.5 {
  set maxreq [lindex [sqlite3_status SQLITE_STATUS_MALLOC_SIZE 0] 2]
  expr {$maxreq<4100}
} 1

do_test memsubsys1-7.6 {
  set s_used [lindex [sqlite3_status SQLITE_STATUS_SCRATCH_USED 0] 2]
} 1
do_test memsubsys1-7.7 {
  set s_ovfl [lindex [sqlite3_status SQLITE_STATUS_SCRATCH_OVERFLOW 0] 2]
} 0








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sqlite3_config_pagecache [expr 1024+$xtra_size] 20
sqlite3_initialize
reset_highwater_marks
build_test_db memsubsys1-2 {PRAGMA page_size=1024}
#show_memstats
set MEMORY_MANAGEMENT $sqlite_options(memorymanage)
ifcapable !malloc_usable_size {
  if !$::sqlite_options(enable_purgeable_pcache) {
    do_test memsubsys1-2.3 {
      set pg_ovfl [lindex [sqlite3_status SQLITE_STATUS_PAGECACHE_OVERFLOW 0] 2]
    } [expr ($TEMP_STORE>1 || $MEMORY_MANAGEMENT==0)*1024]
  }
}
do_test memsubsys1-2.4 {
  set pg_used [lindex [sqlite3_status SQLITE_STATUS_PAGECACHE_USED 0] 2]
} 20
do_test memsubsys1-2.5 {
  set s_used [lindex [sqlite3_status SQLITE_STATUS_SCRATCH_USED 0] 2]
} 0
................................................................................
db close
sqlite3_shutdown
sqlite3_config_pagecache [expr 512+$xtra_size] 20
sqlite3_initialize
reset_highwater_marks
build_test_db memsubsys1-3.1 {PRAGMA page_size=1024}
#show_memstats
if !$::sqlite_options(enable_purgeable_pcache) {
  do_test memsubsys1-3.1.3 {
    set pg_used [lindex [sqlite3_status SQLITE_STATUS_PAGECACHE_USED 0] 2]
  } 0
  do_test memsubsys1-3.1.4 {
    set overflow [lindex [sqlite3_status SQLITE_STATUS_PAGECACHE_OVERFLOW 0] 2]
  } $max_pagecache
}
do_test memsubsys1-3.1.5 {
  set s_used [lindex [sqlite3_status SQLITE_STATUS_SCRATCH_USED 0] 2]
} 0
db close
sqlite3_shutdown
sqlite3_config_pagecache [expr 2048+$xtra_size] 20
sqlite3_initialize
................................................................................
reset_highwater_marks
build_test_db memsubsys1-4 {PRAGMA page_size=1024}
#show_memstats
do_test memsubsys1-4.3 {
  set pg_used [lindex [sqlite3_status SQLITE_STATUS_PAGECACHE_USED 0] 2]
  expr {$pg_used>=45 && $pg_used<=50}
} 1
if !$::sqlite_options(enable_purgeable_pcache) {
  do_test memsubsys1-4.4 {
    set pg_ovfl [lindex [sqlite3_status SQLITE_STATUS_PAGECACHE_OVERFLOW 0] 2]
  } 0
}
do_test memsubsys1-4.5 {
  set maxreq [lindex [sqlite3_status SQLITE_STATUS_MALLOC_SIZE 0] 2]
  expr {$maxreq<7000}
} 1
do_test memsubsys1-4.6 {
  set s_used [lindex [sqlite3_status SQLITE_STATUS_SCRATCH_USED 0] 2]
} 1
................................................................................
  PRAGMA temp_store=memory;
}
#show_memstats
do_test memsubsys1-7.3 {
  set pg_used [lindex [sqlite3_status SQLITE_STATUS_PAGECACHE_USED 0] 2]
  expr {$pg_used<24}
} 1
if !$::sqlite_options(enable_purgeable_pcache) {
  do_test memsubsys1-7.4 {
    set pg_ovfl [lindex [sqlite3_status SQLITE_STATUS_PAGECACHE_OVERFLOW 0] 2]
  } 0
  do_test memsubsys1-7.5 {
    set maxreq [lindex [sqlite3_status SQLITE_STATUS_MALLOC_SIZE 0] 2]
    expr {$maxreq<4100}
  } 1
}
do_test memsubsys1-7.6 {
  set s_used [lindex [sqlite3_status SQLITE_STATUS_SCRATCH_USED 0] 2]
} 1
do_test memsubsys1-7.7 {
  set s_ovfl [lindex [sqlite3_status SQLITE_STATUS_SCRATCH_OVERFLOW 0] 2]
} 0

Changes to test/pager1.test.

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1164



1165
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    7  { INSERT INTO t1 VALUES(5, 6); } {}        -1 [wal_file_size 2 1024]
  
    8  { PRAGMA journal_mode = TRUNCATE } truncate          0 -1
    9  { INSERT INTO t1 VALUES(7, 8) }    {}                0 -1
    10 { SELECT * FROM t1 }               {1 2 3 4 5 6 7 8} 0 -1
  
  }] {



    do_execsql_test pager1-7.1.$tn.1 $sql $res
    catch { set J -1 ; set J [file size test.db-journal] }
    catch { set W -1 ; set W [file size test.db-wal] }
    do_test pager1-7.1.$tn.2 { list $J $W } [list $js $ws]
  }
}








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    7  { INSERT INTO t1 VALUES(5, 6); } {}        -1 [wal_file_size 2 1024]
  
    8  { PRAGMA journal_mode = TRUNCATE } truncate          0 -1
    9  { INSERT INTO t1 VALUES(7, 8) }    {}                0 -1
    10 { SELECT * FROM t1 }               {1 2 3 4 5 6 7 8} 0 -1
  
  }] {
    ifcapable enable_persist_wal {
      file_control_persist_wal db 0
    }
    do_execsql_test pager1-7.1.$tn.1 $sql $res
    catch { set J -1 ; set J [file size test.db-journal] }
    catch { set W -1 ; set W [file size test.db-wal] }
    do_test pager1-7.1.$tn.2 { list $J $W } [list $js $ws]
  }
}

Changes to test/pcache.test.

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  pcache_stats
} {current 24 max 22 min 20 recyclable 0}

# Rolling back the transaction held by db2 at this point releases a pinned
# page. Because the number of allocated pages is greater than the 
# configured maximum, this page should be freed immediately instead of
# recycled.
#


do_test pcache-1.8 {
  execsql {ROLLBACK} db2
  pcache_stats
} {current 23 max 22 min 20 recyclable 0}

do_test pcache-1.9 {
  execsql COMMIT
................................................................................
    SELECT * FROM t6 ORDER BY a; SELECT * FROM t6;
    SELECT * FROM t7 ORDER BY a; SELECT * FROM t7;
    SELECT * FROM t8 ORDER BY a; SELECT * FROM t8;
    SELECT * FROM t9 ORDER BY a; SELECT * FROM t9;
  }
  pcache_stats
} {current 14 max 15 min 10 recyclable 14}




finish_test







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  pcache_stats
} {current 24 max 22 min 20 recyclable 0}

# Rolling back the transaction held by db2 at this point releases a pinned
# page. Because the number of allocated pages is greater than the 
# configured maximum, this page should be freed immediately instead of
# recycled.
# Note- purgable_pcache doesn't share caches between connections and these tests
# are only useful for testing that feature.  
if !$::sqlite_options(enable_purgeable_pcache) {
do_test pcache-1.8 {
  execsql {ROLLBACK} db2
  pcache_stats
} {current 23 max 22 min 20 recyclable 0}

do_test pcache-1.9 {
  execsql COMMIT
................................................................................
    SELECT * FROM t6 ORDER BY a; SELECT * FROM t6;
    SELECT * FROM t7 ORDER BY a; SELECT * FROM t7;
    SELECT * FROM t8 ORDER BY a; SELECT * FROM t8;
    SELECT * FROM t9 ORDER BY a; SELECT * FROM t9;
  }
  pcache_stats
} {current 14 max 15 min 10 recyclable 14}
} else {
  db2 close
}

finish_test

Changes to test/shrink.test.

12
13
14
15
16
17
18





19
20
21
22
23
24
25
# This file contains test cases for sqlite3_db_release_memory and
# the PRAGMA shrink_memory statement.
#

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






unset -nocomplain baseline
do_test shrink-1.1 {
  db eval {
    PRAGMA cache_size = 2000;
    CREATE TABLE t1(x,y);
    INSERT INTO t1 VALUES(randomblob(1000000),1);
  }







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# This file contains test cases for sqlite3_db_release_memory and
# the PRAGMA shrink_memory statement.
#

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

# purgeable pcache tracks memory differently
ifcapable {enable_purgeable_pcache} {
  finish_test
  return
}
unset -nocomplain baseline
do_test shrink-1.1 {
  db eval {
    PRAGMA cache_size = 2000;
    CREATE TABLE t1(x,y);
    INSERT INTO t1 VALUES(randomblob(1000000),1);
  }

Changes to test/wal.test.

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  execsql {
    COMMIT;
    SELECT * FROM t1;
  }
} {a b}

do_test wal-4.4.1 {



  db close
  sqlite3 db test.db
  db func blob blob
  list [execsql { SELECT * FROM t1 }] [file size test.db-wal]
} {{a b} 0}
do_test wal-4.4.2 {
  execsql { PRAGMA cache_size = 10 }
................................................................................
do_test wal-4.4.7 {
  execsql { PRAGMA integrity_check } db2
} {ok}
db2 close

do_test wal-4.5.1 {
  reopen_db



  db func blob blob
  execsql {
    PRAGMA journal_mode = WAL;
    CREATE TABLE t1(a, b);
    INSERT INTO t1 VALUES('a', 'b');
  }
  sqlite3 db test.db
................................................................................

foreach sector {512 4096} {
  sqlite3_simulate_device -sectorsize $sector
  foreach pgsz {512 1024 2048 4096} {
    forcedelete test.db test.db-wal
    do_test wal-6.$sector.$pgsz.1 {
      sqlite3 db test.db -vfs devsym



      execsql "
        PRAGMA page_size = $pgsz;
        PRAGMA auto_vacuum = 0;
        PRAGMA journal_mode = wal;
      "
      execsql "
        CREATE TABLE t1(a, b);
................................................................................
  }
} {16 ok}
do_test wal-11.8 {
  execsql { PRAGMA wal_checkpoint }
  list [expr [file size test.db]/1024] [file size test.db-wal]
} [list 37 [wal_file_size 41 1024]]
do_test wal-11.9 {



  db close
  list [expr [file size test.db]/1024] [log_deleted test.db-wal]
} {37 1}
sqlite3_wal db test.db



do_test wal-11.10 {
  execsql {
    PRAGMA cache_size = 10;
    BEGIN;
      INSERT INTO t1 SELECT blob(900) FROM t1;   -- 32
      SELECT count(*) FROM t1;
  }
................................................................................
    CREATE TABLE t1(x, y);
    CREATE TABLE t2(x, y);
    INSERT INTO t1 VALUES('A', 1);
  }
  list [expr [file size test.db]/1024] [file size test.db-wal]
} [list 1 [wal_file_size 5 1024]]
do_test wal-12.2 {



  db close
  sqlite3 db test.db
  execsql {
    PRAGMA synchronous = normal;
    UPDATE t1 SET y = 0 WHERE x = 'A';
  }
  list [expr [file size test.db]/1024] [expr [file size test.db-wal]/1044]
................................................................................
do_test wal-12.6 {
  forcecopy test.db test2.db
  forcecopy test.db-wal test2.db-wal
  sqlite3_wal db2 test2.db
  execsql { SELECT * FROM t2 } db2
} {B 2}
db2 close



db close

#-------------------------------------------------------------------------
# Test large log summaries.
#
# In this case "large" usually means a log file that requires a wal-index
# mapping larger than 64KB (the default initial allocation). A 64KB wal-index
................................................................................
  puts $fd ""
  close $fd
  sqlite3 db test.db
  execsql { SELECT * FROM t2 }
} {B 2}
breakpoint
do_test wal-13.1.3 {



  db close
  file exists test.db-wal
} {0}

do_test wal-13.2.1 {
  sqlite3 db test.db
  execsql { SELECT count(*) FROM t2 }
................................................................................
do_test wal-19.2 {
  execsql {
    INSERT INTO t1 VALUES(5, 6);
    SELECT * FROM t1;
  }
} {1 2 3 4 5 6}
do_test wal-19.3 {



  db close
  db2 close
  file exists test.db-wal
} {0}
do_test wal-19.4 {
  # When the bug was present, the following was returning {1 2 3 4} only,
  # as [db2] had an out-of-date copy of the wal-index header when it was
................................................................................
  faultsim_delete_and_reopen
  execsql {
    CREATE TABLE t1(a, b);
    PRAGMA journal_mode = WAL;
    INSERT INTO t1 VALUES(1, 2);
    INSERT INTO t1 VALUES(3, 4);
  }



  faultsim_save_and_close

  sqlite3_shutdown
  test_sqlite3_log [list lappend ::log]
  set ::log [list]
  sqlite3 db test.db
  execsql { SELECT * FROM t1 }
................................................................................
    INSERT INTO t1 VALUES(randomblob(5000));
    INSERT INTO t1 SELECT * FROM t1;
    INSERT INTO t1 SELECT * FROM t1;
    INSERT INTO t1 SELECT * FROM t1;
    INSERT INTO t1 SELECT * FROM t1;
  } {wal}
  do_test 24.2 { 



    execsql {
      DELETE FROM t1;
      PRAGMA wal_checkpoint;
    }
    db close
    sqlite3 db test.db
    file exists test.db-wal
................................................................................
  # It would be two frames (the new root page and a padding frame) if the
  # ZERO_DAMAGE flag were not set.
  do_test 24.5 {
    file size test.db-wal
  } [wal_file_size 1 1024]
}




db close
sqlite3_shutdown
test_sqlite3_log
sqlite3_initialize

finish_test







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...
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....
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1610
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  execsql {
    COMMIT;
    SELECT * FROM t1;
  }
} {a b}

do_test wal-4.4.1 {
  ifcapable enable_persist_wal {
    file_control_persist_wal db 0
  }
  db close
  sqlite3 db test.db
  db func blob blob
  list [execsql { SELECT * FROM t1 }] [file size test.db-wal]
} {{a b} 0}
do_test wal-4.4.2 {
  execsql { PRAGMA cache_size = 10 }
................................................................................
do_test wal-4.4.7 {
  execsql { PRAGMA integrity_check } db2
} {ok}
db2 close

do_test wal-4.5.1 {
  reopen_db
  ifcapable enable_persist_wal {
    file_control_persist_wal db 0
  }
  db func blob blob
  execsql {
    PRAGMA journal_mode = WAL;
    CREATE TABLE t1(a, b);
    INSERT INTO t1 VALUES('a', 'b');
  }
  sqlite3 db test.db
................................................................................

foreach sector {512 4096} {
  sqlite3_simulate_device -sectorsize $sector
  foreach pgsz {512 1024 2048 4096} {
    forcedelete test.db test.db-wal
    do_test wal-6.$sector.$pgsz.1 {
      sqlite3 db test.db -vfs devsym
      ifcapable enable_persist_wal {
        file_control_persist_wal db 0
      }
      execsql "
        PRAGMA page_size = $pgsz;
        PRAGMA auto_vacuum = 0;
        PRAGMA journal_mode = wal;
      "
      execsql "
        CREATE TABLE t1(a, b);
................................................................................
  }
} {16 ok}
do_test wal-11.8 {
  execsql { PRAGMA wal_checkpoint }
  list [expr [file size test.db]/1024] [file size test.db-wal]
} [list 37 [wal_file_size 41 1024]]
do_test wal-11.9 {
  ifcapable enable_persist_wal {
    file_control_persist_wal db 0
  }
  db close
  list [expr [file size test.db]/1024] [log_deleted test.db-wal]
} {37 1}
sqlite3_wal db test.db
ifcapable enable_persist_wal {
  file_control_persist_wal db 0
}
do_test wal-11.10 {
  execsql {
    PRAGMA cache_size = 10;
    BEGIN;
      INSERT INTO t1 SELECT blob(900) FROM t1;   -- 32
      SELECT count(*) FROM t1;
  }
................................................................................
    CREATE TABLE t1(x, y);
    CREATE TABLE t2(x, y);
    INSERT INTO t1 VALUES('A', 1);
  }
  list [expr [file size test.db]/1024] [file size test.db-wal]
} [list 1 [wal_file_size 5 1024]]
do_test wal-12.2 {
  ifcapable enable_persist_wal {
    file_control_persist_wal db 0
  }
  db close
  sqlite3 db test.db
  execsql {
    PRAGMA synchronous = normal;
    UPDATE t1 SET y = 0 WHERE x = 'A';
  }
  list [expr [file size test.db]/1024] [expr [file size test.db-wal]/1044]
................................................................................
do_test wal-12.6 {
  forcecopy test.db test2.db
  forcecopy test.db-wal test2.db-wal
  sqlite3_wal db2 test2.db
  execsql { SELECT * FROM t2 } db2
} {B 2}
db2 close
ifcapable enable_persist_wal {
  file_control_persist_wal db 0
}
db close

#-------------------------------------------------------------------------
# Test large log summaries.
#
# In this case "large" usually means a log file that requires a wal-index
# mapping larger than 64KB (the default initial allocation). A 64KB wal-index
................................................................................
  puts $fd ""
  close $fd
  sqlite3 db test.db
  execsql { SELECT * FROM t2 }
} {B 2}
breakpoint
do_test wal-13.1.3 {
  ifcapable enable_persist_wal {
    file_control_persist_wal db 0
  }
  db close
  file exists test.db-wal
} {0}

do_test wal-13.2.1 {
  sqlite3 db test.db
  execsql { SELECT count(*) FROM t2 }
................................................................................
do_test wal-19.2 {
  execsql {
    INSERT INTO t1 VALUES(5, 6);
    SELECT * FROM t1;
  }
} {1 2 3 4 5 6}
do_test wal-19.3 {
  ifcapable enable_persist_wal {
    file_control_persist_wal db2 0
  }
  db close
  db2 close
  file exists test.db-wal
} {0}
do_test wal-19.4 {
  # When the bug was present, the following was returning {1 2 3 4} only,
  # as [db2] had an out-of-date copy of the wal-index header when it was
................................................................................
  faultsim_delete_and_reopen
  execsql {
    CREATE TABLE t1(a, b);
    PRAGMA journal_mode = WAL;
    INSERT INTO t1 VALUES(1, 2);
    INSERT INTO t1 VALUES(3, 4);
  }
  ifcapable enable_persist_wal {
    file_control_persist_wal db 0
  }
  faultsim_save_and_close

  sqlite3_shutdown
  test_sqlite3_log [list lappend ::log]
  set ::log [list]
  sqlite3 db test.db
  execsql { SELECT * FROM t1 }
................................................................................
    INSERT INTO t1 VALUES(randomblob(5000));
    INSERT INTO t1 SELECT * FROM t1;
    INSERT INTO t1 SELECT * FROM t1;
    INSERT INTO t1 SELECT * FROM t1;
    INSERT INTO t1 SELECT * FROM t1;
  } {wal}
  do_test 24.2 { 
    ifcapable enable_persist_wal {
      file_control_persist_wal db 0
    }
    execsql {
      DELETE FROM t1;
      PRAGMA wal_checkpoint;
    }
    db close
    sqlite3 db test.db
    file exists test.db-wal
................................................................................
  # It would be two frames (the new root page and a padding frame) if the
  # ZERO_DAMAGE flag were not set.
  do_test 24.5 {
    file size test.db-wal
  } [wal_file_size 1 1024]
}

ifcapable enable_persist_wal {
  file_control_persist_wal db 0
}
db close
sqlite3_shutdown
test_sqlite3_log
sqlite3_initialize

finish_test

Changes to test/wal2.test.

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      INSERT INTO t1 VALUES('Chico');
      INSERT INTO t1 VALUES('Harpo');
    COMMIT;
  }
  list [file exists test.db-wal] [file exists test.db-journal]
} {1 0}
do_test wal2-6.3.2 {



  execsql { PRAGMA journal_mode = DELETE }
  file exists test.db-wal
} {0}



do_test wal2-6.3.3 {
  execsql { PRAGMA lock_status }
} {main exclusive temp closed}
do_test wal2-6.3.4 {
  execsql { 
    BEGIN;
      INSERT INTO t1 VALUES('Groucho');
................................................................................
    if {[string match {#*} $sq]==0} {append S "$sq\n"}
  }

  set ::locks [list]
  do_test wal2-6.4.$tn.1 { execsql $S } $res
  do_test wal2-6.4.$tn.2 { set ::locks  } $L
}



db close
tvfs delete

do_test wal2-6.5.1 {
  sqlite3 db test.db
  execsql {
    PRAGMA auto_vacuum = 0;
................................................................................
      execsql { INSERT INTO tx DEFAULT VALUES }
      list [file exists test.db-wal] [file exists $shmpath]
    } {1 1}
    do_test wal2-12.2.$tn.4 {
      list [file attr test.db-wal -perm] [file attr $shmpath -perm]
    } [list $effective $effective]
    do_test wal2-12.2.$tn.5 {



      db close
      list [file exists test.db-wal] [file exists $shmpath]
    } {0 0}
  }
}

#-------------------------------------------------------------------------







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      INSERT INTO t1 VALUES('Chico');
      INSERT INTO t1 VALUES('Harpo');
    COMMIT;
  }
  list [file exists test.db-wal] [file exists test.db-journal]
} {1 0}
do_test wal2-6.3.2 {
  ifcapable enable_persist_wal {
    file_control_persist_wal db 0
  }
  execsql { PRAGMA journal_mode = DELETE }
  file exists test.db-wal
} {0}
do_test wal2-6.3.2.1 {
  execsql { PRAGMA journal_mode; }
} {delete}
do_test wal2-6.3.3 {
  execsql { PRAGMA lock_status }
} {main exclusive temp closed}
do_test wal2-6.3.4 {
  execsql { 
    BEGIN;
      INSERT INTO t1 VALUES('Groucho');
................................................................................
    if {[string match {#*} $sq]==0} {append S "$sq\n"}
  }

  set ::locks [list]
  do_test wal2-6.4.$tn.1 { execsql $S } $res
  do_test wal2-6.4.$tn.2 { set ::locks  } $L
}
ifcapable enable_persist_wal {
  file_control_persist_wal db 0
}
db close
tvfs delete

do_test wal2-6.5.1 {
  sqlite3 db test.db
  execsql {
    PRAGMA auto_vacuum = 0;
................................................................................
      execsql { INSERT INTO tx DEFAULT VALUES }
      list [file exists test.db-wal] [file exists $shmpath]
    } {1 1}
    do_test wal2-12.2.$tn.4 {
      list [file attr test.db-wal -perm] [file attr $shmpath -perm]
    } [list $effective $effective]
    do_test wal2-12.2.$tn.5 {
      ifcapable enable_persist_wal {
        file_control_persist_wal db 0
      }
      db close
      list [file exists test.db-wal] [file exists $shmpath]
    } {0 0}
  }
}

#-------------------------------------------------------------------------

Changes to test/wal5.test.

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    proc busyhandler {n} {
      incr ::nBusyHandler 
      eval $::busy_handler_script
      return 0
    }

    proc reopen_all {} {





      code1 {db close}
      code2 {db2 close}
      code3 {db3 close}

      code1 {sqlite3 db test.db}
      code2 {sqlite3 db2 test.db}
      code3 {sqlite3 db3 test.db}
................................................................................

    do_test 3.$tn.2 { code2 { do_wal_checkpoint db2 } } {0 2 2}

    do_test 3.$tn.3 { code2 { do_wal_checkpoint db2 } } {0 2 2}

    do_test 3.$tn.4 { code3 { do_wal_checkpoint db3 } } {0 2 2}






    code1 {db  close}
    code2 {db2 close}
    code3 {db3 close}

    code1 {sqlite3 db  test.db}
    code2 {sqlite3 db2 test.db}
    code3 {sqlite3 db3 test.db}







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    proc busyhandler {n} {
      incr ::nBusyHandler 
      eval $::busy_handler_script
      return 0
    }

    proc reopen_all {} {
      ifcapable enable_persist_wal {
        code1 { file_control_persist_wal db 0 }
        code2 { file_control_persist_wal db2 0 }
        code3 { file_control_persist_wal db3 0 }
      }
      code1 {db close}
      code2 {db2 close}
      code3 {db3 close}

      code1 {sqlite3 db test.db}
      code2 {sqlite3 db2 test.db}
      code3 {sqlite3 db3 test.db}
................................................................................

    do_test 3.$tn.2 { code2 { do_wal_checkpoint db2 } } {0 2 2}

    do_test 3.$tn.3 { code2 { do_wal_checkpoint db2 } } {0 2 2}

    do_test 3.$tn.4 { code3 { do_wal_checkpoint db3 } } {0 2 2}

    ifcapable enable_persist_wal {
      code1 { file_control_persist_wal db 0 }
      code2 { file_control_persist_wal db2 0 }
      code3 { file_control_persist_wal db3 0 }
    }
    code1 {db  close}
    code2 {db2 close}
    code3 {db3 close}

    code1 {sqlite3 db  test.db}
    code2 {sqlite3 db2 test.db}
    code3 {sqlite3 db3 test.db}

Changes to test/walbak.test.

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  catch { db close } 
  catch { db2 close } 
  forcedelete test.db test.db2

  do_test walbak-4.$tn.1 {
    sqlite3 db test.db
    db eval "PRAGMA journal_mode = $src"



    db eval {
      CREATE TABLE t1(a, b);
      INSERT INTO t1 VALUES('I', 'II');
      INSERT INTO t1 VALUES('III', 'IV');
    }

    sqlite3 db2 test.db2
    db2 eval "PRAGMA journal_mode = $dest"



    db2 eval {
      CREATE TABLE t2(x, y);
      INSERT INTO t2 VALUES('1', '2');
      INSERT INTO t2 VALUES('3', '4');
    }
  } {}








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  catch { db close } 
  catch { db2 close } 
  forcedelete test.db test.db2

  do_test walbak-4.$tn.1 {
    sqlite3 db test.db
    db eval "PRAGMA journal_mode = $src"
    ifcapable enable_persist_wal {
      file_control_persist_wal db 0
    }
    db eval {
      CREATE TABLE t1(a, b);
      INSERT INTO t1 VALUES('I', 'II');
      INSERT INTO t1 VALUES('III', 'IV');
    }

    sqlite3 db2 test.db2
    db2 eval "PRAGMA journal_mode = $dest"
    ifcapable enable_persist_wal {
      file_control_persist_wal db2 0
    }
    db2 eval {
      CREATE TABLE t2(x, y);
      INSERT INTO t2 VALUES('1', '2');
      INSERT INTO t2 VALUES('3', '4');
    }
  } {}

Changes to test/walhook.test.

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    return 0
  }
  execsql { CREATE TABLE t3(a PRIMARY KEY, b) }
  file size test.db
} [expr 6*1024]

db2 close



db close
sqlite3 db test.db



do_test walhook-2.1 {
  execsql { PRAGMA synchronous = NORMAL }
  execsql { PRAGMA wal_autocheckpoint }
} {1000}
do_test walhook-2.2 {
  execsql { PRAGMA wal_autocheckpoint = 10}
} {10}







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    return 0
  }
  execsql { CREATE TABLE t3(a PRIMARY KEY, b) }
  file size test.db
} [expr 6*1024]

db2 close
ifcapable enable_persist_wal {
  file_control_persist_wal db 0
}
db close
sqlite3 db test.db
ifcapable enable_persist_wal {
  file_control_persist_wal db 0
}
do_test walhook-2.1 {
  execsql { PRAGMA synchronous = NORMAL }
  execsql { PRAGMA wal_autocheckpoint }
} {1000}
do_test walhook-2.2 {
  execsql { PRAGMA wal_autocheckpoint = 10}
} {10}

Changes to test/walmode.test.

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  execsql { CREATE TABLE t1(a, b) }
  file size test.db
} {1024}
do_test walmode-1.6 {
  file exists test.db-wal
} {1}
do_test walmode-1.7 {



  db close
  file exists test.db-wal
} {0}

# There is now a database file with the read and write versions set to 2
# in the file system. This file should default to WAL mode.
#
................................................................................
  file exists test.db-wal
} {0}
do_test walmode-2.2 {
  execsql { SELECT * FROM sqlite_master }
  file exists test.db-wal
} {1}
do_test walmode-2.3 {



  db close
  file exists test.db-wal
} {0}

# If the first statement executed is "PRAGMA journal_mode = wal", and
# the file is already configured for WAL (read and write versions set
# to 2), then there should be no need to write the database. The 
................................................................................
  list $sqlite_sync_count [file exists test.db-wal] [file size test.db-wal]
} {0 1 0}

# Test that changing back to journal_mode=persist works.
#
do_test walmode-4.1 {
  execsql { INSERT INTO t1 VALUES(1, 2) }



  execsql { PRAGMA journal_mode = persist }
} {persist}
do_test walmode-4.2 {
  list [file exists test.db-journal] [file exists test.db-wal]
} {1 0}
do_test walmode-4.3 {
  execsql { SELECT * FROM t1 }
................................................................................

# Test that nothing goes wrong if a connection is prevented from changing
# from WAL to rollback mode because a second connection has the database
# open. Or from rollback to WAL.
#
do_test walmode-4.6 {
  sqlite3 db2 test.db



  execsql { PRAGMA main.journal_mode } db2
} {delete}
do_test walmode-4.7 {
  execsql { PRAGMA main.journal_mode = wal } db
} {wal}
do_test walmode-4.8 {
  execsql { SELECT * FROM t1 } db2
................................................................................
} {1 {database is locked}}
do_test walmode-4.10 {
  execsql { PRAGMA main.journal_mode } db
} {wal}

do_test walmode-4.11 {
  db2 close



  execsql { PRAGMA journal_mode = delete } db
} {delete}
do_test walmode-4.12 {
  execsql { PRAGMA main.journal_mode } db
} {delete}
do_test walmode-4.13 {
  list [file exists test.db-journal] [file exists test.db-wal]
................................................................................
# Test the effect of a "PRAGMA journal_mode" command being the first 
# thing executed by a new connection. This means that the schema is not
# loaded when sqlite3_prepare_v2() is called to compile the statement.
#
do_test walmode-7.0 {
  forcedelete test.db
  sqlite3 db test.db



  execsql {
    PRAGMA journal_mode = WAL;
    CREATE TABLE t1(a, b);
  }
} {wal}
foreach {tn sql result} {
  1  "PRAGMA journal_mode"                wal







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  execsql { CREATE TABLE t1(a, b) }
  file size test.db
} {1024}
do_test walmode-1.6 {
  file exists test.db-wal
} {1}
do_test walmode-1.7 {
  ifcapable enable_persist_wal {
    file_control_persist_wal db 0
  }
  db close
  file exists test.db-wal
} {0}

# There is now a database file with the read and write versions set to 2
# in the file system. This file should default to WAL mode.
#
................................................................................
  file exists test.db-wal
} {0}
do_test walmode-2.2 {
  execsql { SELECT * FROM sqlite_master }
  file exists test.db-wal
} {1}
do_test walmode-2.3 {
  ifcapable enable_persist_wal {
    file_control_persist_wal db 0
  }
  db close
  file exists test.db-wal
} {0}

# If the first statement executed is "PRAGMA journal_mode = wal", and
# the file is already configured for WAL (read and write versions set
# to 2), then there should be no need to write the database. The 
................................................................................
  list $sqlite_sync_count [file exists test.db-wal] [file size test.db-wal]
} {0 1 0}

# Test that changing back to journal_mode=persist works.
#
do_test walmode-4.1 {
  execsql { INSERT INTO t1 VALUES(1, 2) }
  ifcapable enable_persist_wal {
    file_control_persist_wal db 0
  }
  execsql { PRAGMA journal_mode = persist }
} {persist}
do_test walmode-4.2 {
  list [file exists test.db-journal] [file exists test.db-wal]
} {1 0}
do_test walmode-4.3 {
  execsql { SELECT * FROM t1 }
................................................................................

# Test that nothing goes wrong if a connection is prevented from changing
# from WAL to rollback mode because a second connection has the database
# open. Or from rollback to WAL.
#
do_test walmode-4.6 {
  sqlite3 db2 test.db
  ifcapable enable_persist_wal {
    file_control_persist_wal db2 0
  }
  execsql { PRAGMA main.journal_mode } db2
} {delete}
do_test walmode-4.7 {
  execsql { PRAGMA main.journal_mode = wal } db
} {wal}
do_test walmode-4.8 {
  execsql { SELECT * FROM t1 } db2
................................................................................
} {1 {database is locked}}
do_test walmode-4.10 {
  execsql { PRAGMA main.journal_mode } db
} {wal}

do_test walmode-4.11 {
  db2 close
  ifcapable enable_persist_wal {
    file_control_persist_wal db 0
  }
  execsql { PRAGMA journal_mode = delete } db
} {delete}
do_test walmode-4.12 {
  execsql { PRAGMA main.journal_mode } db
} {delete}
do_test walmode-4.13 {
  list [file exists test.db-journal] [file exists test.db-wal]
................................................................................
# Test the effect of a "PRAGMA journal_mode" command being the first 
# thing executed by a new connection. This means that the schema is not
# loaded when sqlite3_prepare_v2() is called to compile the statement.
#
do_test walmode-7.0 {
  forcedelete test.db
  sqlite3 db test.db
  ifcapable enable_persist_wal {
    file_control_persist_wal db 0
  }
  execsql {
    PRAGMA journal_mode = WAL;
    CREATE TABLE t1(a, b);
  }
} {wal}
foreach {tn sql result} {
  1  "PRAGMA journal_mode"                wal

Changes to test/walnoshm.test.

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do_test 1.5 { file exists test.db-wal } {1}

do_execsql_test 1.6 { INSERT INTO t1 VALUES(3, 4) }

do_execsql_test 1.7 {
  PRAGMA locking_mode = normal;
} {exclusive}



do_execsql_test 1.8 {
  PRAGMA journal_mode = delete;
  PRAGMA main.locking_mode;
} {delete exclusive}
do_execsql_test 1.9 {
  PRAGMA locking_mode = normal;
} {normal}







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do_test 1.5 { file exists test.db-wal } {1}

do_execsql_test 1.6 { INSERT INTO t1 VALUES(3, 4) }

do_execsql_test 1.7 {
  PRAGMA locking_mode = normal;
} {exclusive}
ifcapable enable_persist_wal {
  file_control_persist_wal db 0
}
do_execsql_test 1.8 {
  PRAGMA journal_mode = delete;
  PRAGMA main.locking_mode;
} {delete exclusive}
do_execsql_test 1.9 {
  PRAGMA locking_mode = normal;
} {normal}

Changes to test/walpersist.test.

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    INSERT INTO t1 VALUES(randomblob(5000));
  }
  file exists test.db-wal
} {1}
do_test walpersist-1.1 {
  file exists $shmpath
} {1}

do_test walpersist-1.2 {
  db close
  list [file exists test.db] [file exists test.db-wal] [file exists $shmpath]





} {1 0 0}

do_test walpersist-1.3 {
  sqlite3 db test.db
  db eval {SELECT length(a) FROM t1}
} {5000}
do_test walpersist-1.4 {
  list [file exists test.db] [file exists test.db-wal] [file exists $shmpath]
} {1 1 1}

do_test walpersist-1.5 {
  file_control_persist_wal db -1




} {0 0}

do_test walpersist-1.6 {
  file_control_persist_wal db 1
} {0 1}
do_test walpersist-1.7 {
  file_control_persist_wal db -1
} {0 1}
do_test walpersist-1.8 {







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    INSERT INTO t1 VALUES(randomblob(5000));
  }
  file exists test.db-wal
} {1}
do_test walpersist-1.1 {
  file exists $shmpath
} {1}
ifcapable enable_persist_wal {
  do_test walpersist-1.2-on {
    db close
    list [file exists test.db] [file exists test.db-wal] [file exists $shmpath]
  } {1 1 1}
} {
  do_test walpersist-1.2-off {
    db close
    list [file exists test.db] [file exists test.db-wal] [file exists $shmpath]
  } {1 0 0}
}
do_test walpersist-1.3 {
  sqlite3 db test.db
  db eval {SELECT length(a) FROM t1}
} {5000}
do_test walpersist-1.4 {
  list [file exists test.db] [file exists test.db-wal] [file exists $shmpath]
} {1 1 1}
ifcapable enable_persist_wal {
  do_test walpersist-1.5-on {
    file_control_persist_wal db -1
  } {0 1}
} {
  do_test walpersist-1.5-off {
    file_control_persist_wal db -1
  } {0 0}
}
do_test walpersist-1.6 {
  file_control_persist_wal db 1
} {0 1}
do_test walpersist-1.7 {
  file_control_persist_wal db -1
} {0 1}
do_test walpersist-1.8 {

Changes to test/walro.test.

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    code1 { sqlite3 db test.db }
    csql1 { SELECT * FROM t1 }
  } {1 {unable to open database file}}

  # Also test that if the -shm file can be opened for read/write access,
  # it is not if readonly_shm=1 is present in the URI.
  do_test 1.3.2.1 {




    code1 { db close }
    code2 { db2 close }
    file exists $shmpath
  } {0}
  do_test 1.3.2.2 {
    code1 { sqlite3 db file:test.db?readonly_shm=1 }
    csql1 { SELECT * FROM sqlite_master }







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    code1 { sqlite3 db test.db }
    csql1 { SELECT * FROM t1 }
  } {1 {unable to open database file}}

  # Also test that if the -shm file can be opened for read/write access,
  # it is not if readonly_shm=1 is present in the URI.
  do_test 1.3.2.1 {
    ifcapable enable_persist_wal {
      code1 { file_control_persist_wal db 0 }
      code2 { file_control_persist_wal db2 0 }
    }
    code1 { db close }
    code2 { db2 close }
    file exists $shmpath
  } {0}
  do_test 1.3.2.2 {
    code1 { sqlite3 db file:test.db?readonly_shm=1 }
    csql1 { SELECT * FROM sqlite_master }