[9fans] #! scripts

[lucio@proxima.alt.za]

I'm messing around with /sys/src/9/port/sysproc.c and I may have
distorted it beyond recovery, but I have a feeling this problem isn't
of my own making.

I have:

	; cat /bin/ll
	#!/bin/ls -l
	;

If I invoke ll
	; ll
	--rwxrwxr-x M 9 lucio lucio 13 Jan 31 09:30 /bin/ll
	;

no matter where I invoke it, not what I expect at all.  I also have
(my prompt is actually "term% ", in case it matters):

	; cat /bin/en
	#!/bin/echo -n
	; en
	/bin/en;

Now, the question that makes this all very strange is: how does
/rc/bin/service/tcp17010 which contains:

	#!/bin/cpu -R

actually manage to work?  I have broken it during the course of today,
but using 9pccpu.gz off sources as I did now for confirmation, it
seems to work.

In summary, I think sysproc.c:/^sysexec is doing something wrong with
the script header line.  It is rather confusing code and I'm sure it
was more robust last time I messed with it, probably over a year ago.
I plan to fix it, but I need to understand what's broken first, and
that bit I'm finding hard to do.

Could someone with a stable version of Plan 9 please confirm that it
isn't my mind that has suddenly slipped?

++L

PS: invoking

	; ll .

may give an clearer view of the nature of the problem.