20 Sep
2019
20 Sep
'19
12:50 a.m.
KatolaZ:
We can discuss whether the split was necessary or
"right" in the first
instance, as we could discuss whether it was good or not for cat(1) to
leave Murray Hill in 1979 with no options and come back from Berkley
with a source code doubled in size and 9 options in 1982.
We needn't discuss that (though of course there are opinions and
mine are the correct ones), but in the interest of historic accuracy,
I should point out by 1979 (V7) cat had developed a single option -u
to turn off stdio buffering.
Sometime before 1984 or so, that option was removed, and cat was
simplified to just
while ((n = read(fd, buf, sizeof(buf))) > 0)
write(1, buf, n)
(error checking elided for clarity)
which worked just fine for the rest of the life of the Research
system.
So it's true that BSD added needless (in my humble but correct
opinion) options, but not that it had none before they touched it.
Unless all those other programs were stuffed into cat in an earlier
Berkeley system, but I don't think they were.
Norman Wilson
Toronto ON
(Three cats, no options)