Brian <[EMAIL PROTECTED]> writes:
> On 7 Dec 2007 at 12:01, David Kastrup wrote:
>> Alexander Terekhov <[EMAIL PROTECTED]> writes:
>>
>>> David Kastrup wrote:
>>>
>>> [... crying revisionism ...]
>>>
>>> Dear GNUtian dak, please visit
>>
>> Why change the topic? We were talking about a dedicated Linux site
>> which called Linux "a clone of the operating system Unix" and said
>> that this operating system clone was created by Linux Torvalds from
>> scratch even though the term "Unix" certainly comprises more than just
>> a kernel.
>
> But you'd have to agree that user-space utilities like cat and wc are
> essentially trivial, in a way that a kernel isn't trivial.
The last time I looked, user space utilities like gcc, ld, gdb, awk,
sed, bash and a few hundred others were not quite trivial. Apart from
which:
Usage: cat [OPTION] [FILE]...
Concatenate FILE(s), or standard input, to standard output.
-A, --show-all equivalent to -vET
-b, --number-nonblank number nonblank output lines
-e equivalent to -vE
-E, --show-ends display $ at end of each line
-n, --number number all output lines
-s, --squeeze-blank never more than one single blank line
-t equivalent to -vT
-T, --show-tabs display TAB characters as ^I
-u (ignored)
-v, --show-nonprinting use ^ and M- notation, except for LFD and TAB
--help display this help and exit
--version output version information and exit
With no FILE, or when FILE is -, read standard input.
Which is also not all of trivial when compared to some kernel
functionality. I mean, take the "fork" system call. Before all that
copy-on-write nonsense was invented, it just consisted of swapping out a
process without actually terminating the in-memory copy. A UNIX kernel
fit into something like 16kB or so on a PDP-11.
--
David Kastrup, Kriemhildstr. 15, 44793 Bochum
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