The open() call returns a pointer to the appropriate entry in the system wide-open-file table.

Name: The open() call returns a pointer to the appropriate entry in the system wide-open-file table.
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The open() call returns a file descriptor, not a pointer to the system wide-open-file table. The file descriptor is an integer that represents an index in the per-process file descriptor table.

The Open() Call Returns a Pointer to the Appropriate Entry