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Revision as of 00:14, 27 February 2010 by
A LOCK access READ or WRITE can be specified in a file OPEN statement in a network environment(DOS 3.1 or higher).
- Default: When LOCK is not specified in an OPEN statement, all other processes are denied file access.
- LOCK READ: When specified, read access is denied to other file procedures.
- LOCK WRITE: When specified, write access is denied to other file procedures.
- LOCK READ WRITE: When specified any access is denied to other file procedures.
- If another process already has access to a specified file, program access is denied for that file OPEN access. A "Permission Denied" error 70 will be returned. A network program must be able to handle a denial of access error.