PRB: locking() Locks Only Twenty File Regions Simultaneously

ID: Q67485

6.00 6.00a 6.00ax 7.00 | 1.00 1.50

MS-DOS                 | WINDOWS

The information in this article applies to:

• The Microsoft C Run-time (CRT) included with:

      - Microsoft C for MS-DOS, versions 6.0, 6.0a, and 6.0ax
      - Microsoft C/C++ for MS-DOS, version 7.0
      - Microsoft Visual C++ for Windows, versions 1.0 and 1.5
  

SYMPTOMS

The locking() function fails to lock a region of a file when only twenty locks are already in place.

CAUSE

The locking() function exhausted the available file handles provided by the MS-DOS SHARE utility. By default, SHARE provides twenty file handles.

RESOLUTION

Modify the SHARE command line to specify the /L parameter and a larger number of file handles. For example, to support locking up to fifty file regions simultaneously, modify the SHARE command line in the AUTOEXEC.BAT file as follows:

   SHARE /L:50

Last Reviewed: July 18, 1997