Re: [dev] [PATCH 1/2] find: "-" by itself is a file name

From: Tavian Barnes <>
Date: Fri, 2 Nov 2018 09:21:45 -0400

On Fri, 2 Nov 2018 at 04:22, Quentin Rameau <> wrote:
> Hello Tavian,
> > See for a discussion of why the
> > POSIX wording implies that "-" by itself is not part of the expression.
> I think this was a pedantly wrong interpretation of the standard.

It certainly is pedantic.

> The specification has been reworded since to prevent this:
> “The first operand and subsequent operands up to but not including the
> first operand that starts with a '-', or is a '!' or a '(', shall be
> interpreted as path operands.”
> “If the first operand starts with a '-', or is a '!' or a '(', the
> behavior is unspecified”
> So no, POSIX doesn't say (or imply) that "-" is to be treated as a path.
> The implementation is free to chose, then you can't expect
> compatibility there and shouldn't rely on that.

My interpretation of the linked thread was that "starts with" is
supposed to mean a strict prefix in POSIX, so "-" doesn't start with
"-". I haven't found anything in the standard that says that
explicitly though. If you'd rather interpret "starts with" to include
exact matches, feel free to drop this patch.

Tavian Barnes
Received on Fri Nov 02 2018 - 14:21:45 CET

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