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Re: use of program_name
From: |
Paul Eggert |
Subject: |
Re: use of program_name |
Date: |
Thu, 05 Jan 2006 14:03:27 -0800 |
User-agent: |
Gnus/5.1007 (Gnus v5.10.7) Emacs/21.4 (gnu/linux) |
Dave Love <address@hidden> writes:
> Paul Eggert <address@hidden> writes:
>
>> Under the current approach, it's the caller's responsibility to arrange
>> for a program_name variable that works, either by using the progname
>> module, or by rolling their own program_name variable.
>
> So gnulib shouldn't be used for libraries (or at least not unless you
> avoid modules calling `error' or accept errors spewing junk messages)?
It is a problem, yes. However, it's not quite as bad as that.
The library can arrange for program_name to be initialized
before it is used.
>> I suppose it might make sense for error.c to avoid using program_name
>> if it's null.
>
> That's probably a good idea, but why can't it be initialized to null
> in error.c?
Because the current convention is to put this declaration in the main
program, at the top level:
char *program_name;
Hence the main program has allocated program_name, and has arranged
for it to be initialized to null. If we put a similar declaration in
error.c, it would cause two different definitions of program_name, and
some non-Unix linkers reject this. (The C Standard allows them to
reject it.)
> (If the interface to it was just set_program_name, it could be private.)
Yes, that would be a better convention. This will require revamping
pretty much everybody that uses program_name, but I think it's worth
the pain. What do others think?
- use of program_name, Dave Love, 2006/01/04
- Re: use of program_name, Paul Eggert, 2006/01/04
- Re: use of program_name, Dave Love, 2006/01/05
- Re: use of program_name,
Paul Eggert <=
- Re: use of program_name, Karl Berry, 2006/01/05
- Re: use of program_name, Paul Eggert, 2006/01/05
- Re: use of program_name, Eric Blake, 2006/01/05
- Re: use of program_name, James Youngman, 2006/01/06
- Re: use of program_name, James Youngman, 2006/01/06
- Re: use of program_name, Karl Berry, 2006/01/06
- Re: use of program_name, Paul Eggert, 2006/01/06
- Re: use of program_name, Sergey Poznyakoff, 2006/01/06
- Re: use of program_name, Dave Love, 2006/01/06
- Re: [bug-gnulib] Re: use of program_name, Bruno Haible, 2006/01/09