Using Multiple Archive Handles in Archiving Programs
Using Multiple Archive Handles in Archiving Programs
Occasionally, you may need to develop an archiving program that uses two or more handles. For example, you may need to develop a delete program that first reads an archive before deleting the data from the database. The following indicates which ARCHIVE_OPEN_FOR_* function modules can be called in which order within one program.
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ARCHIVE_OPEN_FOR_WRITE → ARCHIVE_OPEN_FOR_WRITE or ARCHIVE_OPEN_FOR_READ |
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ARCHIVE_OPEN_FOR_DELETE → ARCHIVE_OPEN_FOR_DELETE |
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ARCHIVE_OPEN_FOR_READ → ARCHIVE_OPEN_FOR_READ or ARCHIVE_OPEN_FOR_DELETE or ARCHIVE_OPEN_FOR_WRITE or ARCHIVE_OPEN_FOR_MOVE |
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ARCHIVE_OPEN_FOR_MOVE → ARCHIVE_OPEN_FOR_MOVE |
The call of ARCHIVE_OPEN_FOR_CONVERSION is compatible with the other calls.