Subject: Re: Changing exec's #! behavior
To: None <email@example.com>
From: James R Grinter <firstname.lastname@example.org>
Date: 06/18/2000 13:51:08
Andrew Brown <email@example.com> writes:
> but, no, it doesn't specify how the arg is supposed to be delimited,
> nor does it mention any of the limits (interpreter and arg are limited
> to max 32 characters each) i thought there were. i wonder where i got
> those silly ideas...
from SunOS4, execve:
An interpreter file begins with a line of the form `#!
interpreter [arg]'. Only the first thirty-two characters of
this line are significant. When path refers to an inter-
preter file, execve() invokes the specified interpreter. If
the optional arg is specified, it becomes the first argument
to the interpreter, and the pathname to which path points
becomes the second argument. Otherwise, the pathname to
which path points becomes the first argument. The original
arguments are shifted over to become the subsequent argu-
ments. The zeroth argument, normally the pathname to which
path points, is left unchanged.
'first thirty-two characters of this line'
'optional argument' (not plural)