5 Aug
2019
5 Aug
'19
2:42 a.m.
BSD added the #! "magic number" based on a suggestion from Ken I believe.
Didn't the exec (2) manpage warn about argv[-1] being clobbered until that
was added?
On Sun, Aug 4, 2019, 4:31 PM Clem Cole <clemc(a)ccc.com> wrote:
On Sun, Aug 4, 2019 at 4:18 PM Noel Chiappa <jnc(a)mercury.lcs.mit.edu>
wrote:
Part of the problem is having the kernel involved
in starting shell
scripts; convenient in some ways, but V6 etc worked fine without that
'feature'.
That's a tough call. I have mixed opinions about it as a feature. I
kind of like the user/kernel interface really, really thin and unadorned.
Adding, it certainly made allowing multiple interpreters to be supported
much easier; but as you say it opens a new can of worms. Given the later
proliferation of what bwk or Jon Bently once referred too as 'little
languages' (awk, perl, tcl, and sigh eventually python), it was probably a
good feature.
But as you said, v6 worked fairly well without it.
Clem