Re: usrmerge breaks POSIX
On 2024-02-14 10:41:44 -0800, Russ Allbery wrote:
> Vincent Lefevre <vincent@vinc17.net> writes:
>
> > POSIX says:
>
> > SHELL This variable shall represent a pathname of the user's
> > preferred command language interpreter. If this interpreter
> > does not conform to the Shell Command Language in XCU
> > Chapter 2 (on page 2345), utilities may behave differently
> > from those described in POSIX.1-2017.
>
> > There is no requirement to match one of the /etc/shells pathnames.
> > The user or scripts should be free to use any arbitrary pathname to
> > the command language interpreter available on the system, and Debian
> > should ensure that this is allowed, in particular the one give by
> > the realpath command.
>
> I'm sorry, this is probably a really obvious question, but could you
> explain the connection between the subject of your mail message and the
> body of your mail message? I can't see any relationship, so I guess I
> need it spelled out for me in small words.
>
> (I believe /etc/shells enforcement is done via PAM or in specific
> programs that impose this as an additional non-POSIX restriction. This is
> outside the scope of POSIX.)
What's the point of having a standard if programs are allowed to
reject user settings for arbitrary and undocumented reasons?
--
Vincent Lefèvre <vincent@vinc17.net> - Web: <https://www.vinc17.net/>
100% accessible validated (X)HTML - Blog: <https://www.vinc17.net/blog/>
Work: CR INRIA - computer arithmetic / AriC project (LIP, ENS-Lyon)
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