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| omvfile - virtual file access and locking |
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The omvfile library provides a unified interface to access a file from an OmniMark program, no matter where the file is located and no matter what protocol is used to access the file. One very useful feature of the omvfile library is the ability to lock and unlock entire files or sections of those files.
The omvfile library is a collection of OmniMark external functions. This external function library provides easy, efficient, and portable access to different types of streams and their corresponding connections from within an OmniMark program.
omvfile functions allow you to:
For a sample program, see locking a file, which shows you how to write a counter program for a website using omvfile.
The method of identifying a connection is that used by a URL, as defined in the W3C standards at http://www.w3.org/pub/WWW/Addressing/URL/url-spec.html .
All paths in omvfile operations are system independent and use the "/" UNIX-style separator.
The omvfile external function library requires OmniMark 6.0 or later. As well, the following line must be included at the beginning of the OmniMark program:
include "omvfile.xin"
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Functions vfCursorPosition vfDiscard VFileIsVersionCompatible VFileLibraryVersion vfLock vfMoveCursor vfOpen vfReader vfSize vfUnLock vfURL vfWriter |
Platforms Linux (Intel) MS Windows 95/98 MS Windows NT Sun Solaris |
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