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HP OpenVMS Systemsask the wizard |
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The Question is: We have an indexed variable file, I would like to write a C program to read the records sequentially from the file, could you point me to some sample code The Answer is : The OpenVMS Wizard simply cannot provide examples of calling arbitrary system services in arbitary languages. The OpenVMS Wizard will mention that there are great similarities across system services, and examples of calls to common system services such as $getsyi or $getjpi or $get can easily be used as models for calls to other system services; that you can often use unrelated examples, particularly once you have an understanding of the OpenVMS APIs and the OpenVMS calling standard. The calling standard is documented in the OpenVMS documentation set, of course. As for the question at hand, please see the information on the support resources and on sources for example code listed in the OpenVMS Frequently Asked Questions (FAQ), and the C User's Guide manual contains examples of RMS calls (in the chapter entitled "Using OpenVMS Record Management Services"). Also of central interest here will be the RMS reference manual within the OpenVMS documentation set, and that manual also includes a chapter entitled "Implementing RMS from C Programs". Ask The Wizard Topics here include (367), (1334), (1534), (2821), (2608), (2867), (3261), (6356), (6884), (6916), (7008), and very likely other topics -- in addition to the resources and manuals cited above, that is. You will also particularly want to review topic (1550), as it is also possible to use C RTL calls to access RMS indexed files -- this is described in the C manuals. Also see topic (1661) for general programming information, as well as also reviewing the C programming information within the OpenVMS FAQ.
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