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From: Jeffrey Walton <noloader@gmail.com>
To: musl@lists.openwall.com
Subject: Re: [musl] Re: OS detection wrong on Alpine Linux 3.10
Date: Tue, 22 Sep 2020 16:33:43 -0400	[thread overview]
Message-ID: <CAH8yC8kbEa_ErFo09D6KB2zYQ0wFrHf9Dqx97K4G=KfShvjuJw@mail.gmail.com> (raw)
In-Reply-To: <5868317.9r8Qd0VG7H@omega>

On Tue, Sep 22, 2020 at 4:18 PM Bruno Haible <bruno@clisp.org> wrote:
> ...
> > It's true that implementations have a number of things that are
> > implementation defined, and that the standards specify this as having
> > a documented behavior (which the party reading the documentation can
> > then rely upon). At present musl does not have sufficient
> > documentation in this regard; I began the work of enumerating all the
> > impl-defined behaviors at one point with a goal of documenting them
> > but it was never completed.
>
> It is good to attempt to document such things. But I doubt anyone can
> ever produce a complete documentation of this kind:
>
>   * For many system calls, when POSIX specifies an errno X for condition A,
>     and an errno Y for condition B, then if both A and B apply, often
>     the implementation is free to return errno X or Y. There are many
>     system calls and many possible combinations of conditions...

Not to mention SELinux hijacking error codes and errno so you go
chasing the wrong cause of an error...

Jeff

  reply	other threads:[~2020-09-22 20:34 UTC|newest]

Thread overview: 23+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <4768019.hHWyC0TzgU@omega>
2020-09-20 10:12 ` Dmitry V. Levin
2020-09-20 11:19   ` Bruno Haible
2020-09-20 12:18     ` Ariadne Conill
2020-09-20 13:56     ` Szabolcs Nagy
2020-09-20 17:14       ` Rich Felker
2020-09-20 19:21         ` Bruno Haible
2020-09-20 20:58           ` Hadrien Lacour
2020-09-21  6:53           ` A. Wilcox
2020-09-21 11:46             ` Florian Weimer
2020-09-22 18:46           ` Rich Felker
2020-09-22 20:18             ` Bruno Haible
2020-09-22 20:33               ` Jeffrey Walton [this message]
2020-09-22 20:39             ` Jeffrey Walton
2020-09-22 21:04               ` Laurent Bercot
2020-09-22 21:17                 ` Jeffrey Walton
2020-09-23  8:49                   ` Laurent Bercot
2020-09-23 13:13                     ` James Y Knight
2020-09-23 16:08                       ` Rich Felker
2020-09-23 16:16                         ` Jeffrey Walton
2020-09-23 16:26                           ` Ariadne Conill
2020-09-23 16:57                             ` Jeffrey Walton
2020-09-23 16:36                           ` Rich Felker
2020-09-20 12:19   ` Ariadne Conill

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