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The Question is:
How do I implement the C functions
gethostbyname()and gethostbyaddr() in Fortran?
I've found reference to using a QIO call with
IO$_ACPCONTROL with a subfunction code to search the BIND database but there
are no Fortran examples. I guess my problem is the structures I need to
define and throw into the QIO call.
The Answer is :
It would likely be easiest to to directly call a C routine from the
Fortran code.
Alternatively, please investigate the existing Macro32 example program
TCPIP$EXAMPLES:TCPIP$TCP_CLIENT_QIO.MAR. (This example assumes TCP/IP
Services V5.0 or later is in use.)
If you wish to call sys$qio or sys$qiow from Fortran, various examples
are available -- unfortunately, the OpenVMS Wizard is not in a position
to provide an example of every call to every routine from every language.
Accordingly, you will want to review existing example programs, the
examples in the Support databases (for customers with support contracts),
and programs that call common system services such as sys$getjpiw or
sys$getsyiw. In conjunction with the Fortran documentation (and
particularly the Fortran User's Manual for OpenVMS Alpha and its
examples of calling system services -- an example of sys$qiow is
included there) and the OpenVMS calling standard documentation, you
should be able to code and debug a call to most any OpenVMS system
service routine.
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