9 Mar
2020
9 Mar
'20
2:41 a.m.
On 3/8/20 9:11 PM, Johnny Billquist wrote:
On 2020-03-09 01:53, Johnny Billquist wrote:
IIRC the stream-LF and stuff was in late 3.x and if I'm wrong it was in
before 4.2 when I left VMS work in Field Service.?? I often had files
going between Unix and VMS and I now it was available...
Interesting how Unix seems to have done the most with Timezone
handling.? My guess is it's because of the Bell Systems interest in
record keeping of CDR's (Call-Detail-Records) for phone billing per
minute charges or message units.? They probably kept the records in GMT
and just wrote the local time of call and length on the bills when
processing.
Does anyone know if the assumption is true?
Bill Pechter
On 2020-03-08 23:43, Robert Armstrong wrote:
Are you sure about that?
I must admit I haven't looked beyond 7.3, since I usually play on
VAXen, but I seem to remember clear signs that time is internally
still really localtime.
Actually, looking at the 8.4 manuals, I would say it still keeps the
system on local time.
The $BINUTC system call, for example, which is used to get a UTC time,
states clearly in the manual that it applies the TDC factor to local
time in order to get the UTC time, while $BINTIM just says it gets the
time.
Additionally, system calls like $SETIMR and $SCHDWK takes local time,
not UTC time, as the time when something is supposed to wake up or
cause something to happen. Which even more strongly points to that
internally VMS is at localtime.
But I'd be happy to be proven wrong.
By the way, Stream-LF and Stream-CR have been around longer than this,
I believe. Not sure when those first showed up. NFT in RSX certainly
knows about them, and have since the early 90s I think.
? Johnny
As far as I know, VMS still use local time.
?? VMS has had time zones and automatic daylight savings time
adjustment since 7.3 or so.
?? Actually, when the name changed from VMS to OpenVMS it was
because DEC made some attempts to add Posix compatibility. That
brought in a whole bunch of concepts, including time zones.? I
believe that's also when we got STREAM-LF and STREAM-CR file
organization too.