Re: projected life of the ext2 filesystem format
On Thu, 29 Jan 1998, Brian White wrote:
> > > > ext2 uses _unsigned_ 32-bit words for time, so it will survive until about
> > > > 2106. At that point you'll have to back up and reformat.
> > >
> > > Ok, I have scheduled that. Now, where can I keep my schedule to prevent it
> > > from getting lost for the next 107 years, hmmm...
> > >
> > > Question: does this mean that a file can't have its creation date before
> > > 1970? But the system date can be set before 1970? I hate this stupid
> > > limitations on Linux! ;-)
> >
> > It does - which means that Bruce's interpretation is wrong, because I do
> > have files with dates of 1969 on my disk (and so has everybody who
> > installed doc-rfc).
>
> Remember that the timestamp is in GMT. Thus, depending on your time zone,
> you can get dates that go back (theoretically) up to 12 hours before Jan 1st,
> 1970.
>
>
> > Of course, in reality, it's irrelevant what ext2 uses (so long as it's 32
> > bits), because ext2 doesn't interpret those dates. Linux, OTOH, does.
> > Which means reformat in 2038.
>
> Personally, I don't see why we can't just consider those times as unsigned.
> How reliable, portable, etc. is the use of negative time_t?
time_t foo, bar, baz;
foo = 10;
bar = 20;
baz = foo - bar;
--
Scott K. Ellis <storm@gate.net> http://www.gate.net/~storm/
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