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资源说明：Coreutils clone, just for fun.
ycoreutils is coreutils clone that I write for fun, to compile
it, create and edit config.mak to override defaults, and run
make. This will create binaries in bin/ folder. There are also
3 programs written in assembly. In order to compile them, first
go to asm/lib and make and then, go to asm/ and make again. Your
binaries will be at asm/bin
Default configuration in Makefile uses musl (http://www.etalabs.net/musl/)
and makes statically linked binaries. But of course, you can also
link it against glibc or another C library.
Purpose:
*) Posix compliance: I am trying to confirm to posix standards.
I try not to use gnu extensions and linux spesific system
calls. Yet, I don't have any idea what I am doing, or if
what I am doing is right. I won't mind getting feedback on this.
*) I don't like bloat: I believe tools in coreutils should be
small in size and to the point. Therefore, I don't intend
to support all kinds of possible options or implement out
of the world features.
*) I like correctness and completeness: I belive this point
beats previous point. While keeping things simple, I don't
want to left out usefull features. I only intend to left
out such features that noone ever use, or that are rarely
needed.
*) Personal improvement: I don't know a thing about either
C programming language, unix like systems and software
engineering. But, I will do what I can, and try to
learn things on the process. Therefore, this thing
can turn out to be something bad, or may not turn
out to be anything. We will see.
*) Use musl: I think musl is cool. I don't like glibc.
(see second point) dietlibc (see third point) and uClibc
doesn't feel right for some reason. Thus, I like musl.
It's philosophy might even have affected me on some level.
Since, I like the opportunity to use it, and if I am lucky
I might find and report bugs on it.
End Goal: Write a coreutils clone, that doesn't suck.
Commands sort of working for now:
echo:
except --help and --version options, identical to
echo command you would expect. Seems to be working.
mkdir:
supports -m, -p and -v options. Behaves like what you would
expect. Seems to be working.
cp, id:
these two are partially working, but not quite there yet.
whoami:
Works.
yes:
Works.
true, false:
They are in asm/bin folder. They work.
cat:
It's in asm/bin folder. Works but accepts no
arguments. And, if an argument is "-" or starts
with "-", reads stdin. This should probably changed.
tee:
It accept -a option, and it works I guess.
printenv:
Accepts -0, and it works!
pwd:
Works, but supports no arguments.
wc:
Accept -w -c -l arguments. Works just fine
for ascii texts, but no multibyte thingie support
yet. Also, doesn't accept other arguments.
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