Date: Sat, 2 Jun 2001 17:18:45 +0100 (BST) From: Mark Valentine <mark@thuvia.demon.co.uk> To: seebs@plethora.net (Peter Seebach), hackers@freebsd.org Subject: Re: Fixing documented bug in env(1) Message-ID: <200106021618.f52GIjd35540@dotar-sojat.thuvia.org> In-Reply-To: Peter Seebach's message of Jun 2, 3:26am
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> From: seebs@plethora.net (Peter Seebach)
> Date: Sat 2 Jun, 2001
> Subject: Re: Fixing documented bug in env(1)
> people use --
> to end subsequences of arguments all the time.
No, they use ``--'' to indicate to getopt(3) the end of the _options_ and
the _start_ of the arguments.
Since env(1) uses getopt(3), ``--'' already has meaning to env(1); it allows
environment variables and commands which start with ``-'' (the former is
obviously invalid).
$ env -i -- -t args
currently allows execution of command ``-t''.
However, what Dima proposes doesn't seem to be harmful, just slightly
confusing, and less surprising than inventing a new delimieter such as
``==''.
$ env -i -- foo=bar -- 4=4 args
has two distinct uses of `--'' as per Dima's proposal, the first tells
getopt(3) to stop processing options, and the second tells the argument
processing code to stop looking for variable assignments (i.e. ``4=4''
is a command).
Cheers,
Mark.
--
Mark Valentine, Thuvia Labs <mark@thuvia.co.uk> <http://www.thuvia.co.uk>;
"Tigers will do ANYTHING for a tuna fish sandwich." Mark Valentine uses
"We're kind of stupid that way." *munch* *munch* and endorses FreeBSD
-- <http://www.calvinandhobbes.com>; <http://www.freebsd.org>;
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