Re: error and program_name

[Bruno Haible]

Ping? No one wants to solve this? It's a critical issue for libposix.

Eric Blake wrote:
> error() is not POSIX.  Maybe the thing to do is figure out what in
> libposix is dragging in error(), and work on breaking that dependency.
> That way, a package using libposix then makes their own decision of
> whether to supplement things with error() and program_name.

I replied:
> Very good point. The dependency comes from
> 
>   openat     -->  openat-die  -->  error
>   fdopendir
> 
> Can you work on breaking this dependency? I mean, for example,
> instead of directly calling openat_save_fail() and
> openat_restore_fail(), go through a variable that contains two
> function pointers, and have openat() and fdopendir() return an error code
> if these function pointers are NULL. Like we do with
>   argp_program_version_hook
>   error_print_progname
>   obstack_alloc_failed_handler
> See also
>   c_stack_action
>   install_sigpipe_die_handler