Re: Java in OS?

Matthias Urlichs (smurf@smurf.noris.de)
Sun, 5 May 1996 08:14:58 +0100

In linux.dev.kernel, article <199605031507.QAA26975@snowcrash.cymru.net=
>,
Alan Cox <alan@cymru.net> writes:
> > How would you specify where to find the interpreter? Compiled Java
> > doesn't have comments, so you couldn't use the #!-style approach.
>=20
> You can add one to the front, you can also use something like the elk=
semu
> module that spots elks binaries by magic number, rewrites them to
> allegedly have #! and passes them to the shell interpreter.
>=20
Or you can add a new loader. Use binfmt_scriptshell.c as the example to
follow.=20

NB: Why does trying to exec a script with an interpreter that is itself=
a
script cause an error? Specifically, EPERM? I think that should be allo=
wed.
(Yes I know, other Unixes frequently don't allow this, but that's no
excuse.)

/tmp/foo:
#!/bin/sh
echo "Did it"

/tmp/bar:
#!/tmp/foo
# nothing interesting

% chmod +x /tmp/foo /tmp/bar
% /tmp/bar
bash: ./bar: Permission denied
%

Hmmm...

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