[Toybox] awk (Re: ps down, top to go)

[Andy Chu]

>> OK, that didn't take long!  Thanks Roy.
>
> and the latest minix /bin/sh is here:
> https://github.com/minix3/minix/tree/R3.1.6/commands/sh

This is interesting... do you know why it doesn't appear on the master
branch?  (I actually had a copy of those repo on my machine)

It also doesn't appear on the R3.3.0 branch, which according to
Wikipedia is the latest release of Minix 3.

The website claims that shell scripts are supported through Almquist
shell: http://wiki.minix3.org/doku.php?id=developersguide:programmingminix#how_about_shell_script_programming

This matches my understanding that Minix3 switched to the NetBSD user
space awhile ago.  The minix/commands/ash directory coexists with
minix/commands/sh in this branch.

Of course, none of that means it isn't a distinct code lineage for
POSIX shell.  But unfortunately I can't build this code -- I get all
sorts of errors like:

exec cc -O -D_MINIX -D_POSIX_SOURCE    -c -o sh1.o sh1.c
In file included from sh1.c:6:0:
sh.h:188:28: error: expected declaration specifiers or ‘...’ before ‘(’ token
 _PROTOTYPE(char *rexecve , (char *c , char **v , char **envp ));

There are only 4800 lines of code there.  My feeling is that isn't not
going to pass a lot of my test suite, but obviously reading the source
won't answer that question.

I guess one thing to do would be to boot up a Minix3 VM -- does it use
sh or ash as /bin/sh ?

I should be able to test the following implementations:

- bash
- zsh
- dash
- busybox hush (not bothering to test ash, since it's the same lineage as dash)
- mksh (has Ubuntu package, use this as a standin for the Korn lineage)
- yash (has Ubuntu package)

I didn't try building Coherent sh ... since it's a source dump from
1995, that will probably take some effort.


Andy