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<p>simtools/extracters/ods2/vmstime.c</p>
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On 07-May-20 01:28, Baker, Lawrence M wrote:<br>
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Does anyone know of any portable OpenVMS 64-bit time conversion
routines written in C? I.e., that do not depend on 64-bit data
types so they run on 32-bit machines? Maybe in the SIMH GitHub?
Out there in the Interland?</div>
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I am writing a simtools converter that combines on-disk OpenVMS
Backup save sets into a SIMH .tap image of an OpenVMS Backup
ANSI tape volume. I want to use the date the backup was done
from the Backup save set header for the ANSI HDR1 Creation Date.</div>
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You might ask why? Lately I have had to restore Backup save
sets stored on our NFS file server to SIMH VAXes over a
DECnet/DAP-to-NFS gateway I built a number of years ago. (I
wrote to this group about it in a thread about RSTS/E 10.1-L and
Paper tape on January 6, 2016.) It takes about 2 days to
restore an ~8GB disk image backup from the NFS server, though
the gateway running on an SheevaPlug ARM SoC, to the SIMH VAX
running on my desktop iMac. I am working from home at the
moment, of course. I have become good friends with GNU screen
because of SSH inactivity disconnects and VPN failures. When I
tried to restore a 75GB disk, expecting it to take 10-14 days,
our "friendly" IT security monsters rebooted my iMac on me after
4 days. Grrr. I want to try breaking the <span
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NFS file server</span> transfer step from the SIMH VAX restore
operation. OpenVMS is not so easy as RSX was to read /FOREIGN
disk drives as files. I could not figure out a way to just
MOUNT a Backup save set as a SIMH disk image and get that to
work. I was able to use Mark's tar2mt converter and, using the
proper OpenVMS MOUNT /RECORDSIZE and /BLOCKSIZE qualfiers, was
able to read a Backup save set from an unlabeled tape image.
Labeled tapes are easier to use then unlabeled tapes, since the
file names and file formats are on the tape with the file data.
I know how to write ANSI tape labels, so I have taken it upon
myself as a challenge to write a converter. I think this is the
last piece I need for what I want it to do. I'll certainly
announce it when it is done.</div>
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Thank you in advance for your help.</div>
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<p style="margin-top: 0px; margin-bottom: 0px;margin-top:0;
margin-bottom:0">Larry Baker</p>
<p style="margin-top: 0px; margin-bottom: 0px;margin-top:0;
margin-bottom:0">US Geological Survey</p>
<p style="margin-top: 0px; margin-bottom: 0px;margin-top:0;
margin-bottom:0">650-329-5608</p>
<p style="margin-top: 0px; margin-bottom: 0px;margin-top:0;
margin-bottom:0"><a class="moz-txt-link-abbreviated" href="mailto:baker@usgs.gov">baker@usgs.gov</a></p>
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<pre class="moz-quote-pre" wrap="">_______________________________________________
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