Notes and errata relating to the shell
This ended up being for Linux/BSD and not Minix; I'll try compiling it when I
have a working system, though.
Testing is, as always, weak. Pipes (just |) are not handled at all. Redirects
seemed to work when I tried, but I did not test very much, being more concerned
about zombies at that point.
Note that multiple identical redirects might do interesting things; I didn't try
it but I'd actually expect that it wouldn't error out.
On the positive side, I did manage to make something that compiles cleanly with -Wall
(GCC 4.1.2 and 4.2.1)
The thing that took me the longest and caused the most grief was formatting the
arguments list for execvp. For some reason, I totally forgot that the first argument
needed to be the command itself, then I had an utter nightmare trying to get the
last argument to be null, eventually resorting to a horribly hacky use of calloc.
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