Re: acl, copy-file: First step towards more consistent function names

[Bruno Haible]

Pádraig Brady wrote:
> I always thought the x...() variants indicate they might eXit().
> 
> Are there any other x...() variants that just output a diagnostic,
> and don't exit()?

Indeed, we currently have three categories of x...() variants:

  - Most of them emit diagnostics and call exit (EXIT_FAILURE)
    in some conditions.

  - xset_acl, xcopy_acl: emit diagnostics but do not call
    exit (EXIT_FAILURE). I think that's simply because ACL-related
    errors are generally OK to ignore.

  - These do not emit diagnostics. The 'x' stands for "extended".
      xnanosleep
      xsize
      xstrtod, xstrtold
      xstrtol, xstrtoll, xstrtoimax, xstrtoumax

Should we leave this as is? If not, what would be a better naming convention?

Bruno