[Info-vax] Porting logical name applications to Unix

[Alan Winston - SSRL Central Computing]

In article <ceznAdBoufxH at eisner.encompasserve.org>, koehler at eisner.nospam.encompasserve.org (Bob Koehler) writes:
>In article <00A923BB.4839ED4B at SSRL.SLAC.STANFORD.EDU>, winston at SSRL.SLAC.STANFORD.EDU (Alan Winston - SSRL Central Computing) writes:
>> 
>> They *can*, but in fact (on VMS, even) whether your C program will immediately
>> start acting on the updated translation depends on the setting of a C 
>> runtime logical name.  (We got better performance from Apache when we had it
>> cache the translation rather than retranslating hundreds of thousands of
>> times).
>
>   What runtime logical name?  Unless the C RTL is going out of its way
>   to complicate things logical name translation for file opens are
>   done by RMS.
>

DECC$ENABLE_GETENV_CACHE 


I wasn't talking about file name translation in particular, but logical names
in general.  But in the case of long-running C programs (probably the only case
you might want to enable a GETENV_CACHE, they'll typically open their files at
the beginning, which means you can change the logical name variable all you
want after the file is open in  your long-running program, but it's still going
to have the old file open.

-- Alan