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Date: Sun, 10 Mar 2024 19:44:10 -0400
From: Rich Felker <dalias@...c.org>
To: Thorsten Glaser <tg@...bsd.de>
Cc: musl@...ts.openwall.com, NRK <nrk@...root.org>,
Alejandro Colomar <alx@...nel.org>,
Guillem Jover <guillem@...rons.org>, libc-alpha@...rceware.org,
libbsd@...ts.freedesktop.org, "Serge E. Hallyn" <serge@...lyn.com>,
"Skyler Ferrante (RIT Student)" <sjf5462@....edu>,
Iker Pedrosa <ipedrosa@...hat.com>,
Christian Brauner <christian@...uner.io>
Subject: Re: Re: Tweaking the program name for <err.h> functions
On Sun, Mar 10, 2024 at 11:22:51PM +0000, Thorsten Glaser wrote:
> Rich Felker dixit:
>
> >possibly newline suffix, if you want that). They could have been
> >designed to be one-line macros, ala...
>
> Nope.
>
> No __VA_ARGS__ and especially no ##__VA_ARGS__ in C89, back then.
Well yeah, "could have been" was poor wording by me. At the time, the
options didn't exist. But someone doing that kind of interface now can
use these tools, or just design the interface differently.
With that said, while I'll grant that there are exceptions, it's
generally my impression that if you're pasting in the name of the
program from argv[0] programmatically because it can't just be part of
the string literal, because the string literal appears in modular
library code that gets called from multiple utilities, then printing
an error message (and even worse, exiting, if you do that too), rather
than returning meaningful error information up to the caller for it to
handle/display, is just really sloppy, low-quality programming.
Rich
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