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» Using the online documentation library(installing BNU from the asap SDK)
» Global sections(how to create and use.)
» xx$CREATE_BUFOBJ system service(usage)
» Ethernet address(methods of determination)
» Shareable images(cookbook approach to creating one)
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» Using GETSYI to get hardware status

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Ask the Wizard Questions

VMS C programming question

The Question is:

     VMS 'C' Programming Question - IOCTL() - Can anyone help ?

     Unix has an ioctl(channel, request, &value) function which, when used
     with the FIONREAD request argument, allows a C programmer to determine
     if there are any characters on a channel waiting to be read.  Multinet
     socket programming for VMS has an identical routine called

     Is there a normal (not socket) version of IOCTL() available on the
     VAX, using OpenVMS ?

     Hint:  there is an  header file available, and compilation
     goes fine, but I can't find a library to link to.

The Answer is:

Use of ioctl() requires OpenVMS V7.0 and DEC C 5.2 (or later).  We apologize
for not making the OpenVMS version requirement clear.