Re: mdocml: Finally use __progname, err(3) and warn(3).

[Joerg Sonnenberger <joerg@britannica.bec.de>]

On Sun, Oct 11, 2015 at 04:13:25PM -0500, schwarze@mdocml.bsd.lv wrote:
> Finally use __progname, err(3) and warn(3).
> That's more readable and less error-prone than fumbling around
> with argv[0], fprintf(3), strerror(3), perror(3), and exit(3).
> 
> It's a bad idea to boycott good interfaces merely because standards
> committees ignore them.  Instead, let's provide compatibility modules 
> for archaic systems (like commercial Solaris) that still don't have
> them.  The compat module has an UCB Copyright (c) 1993...

No, the reason to avoid it is because __progname is in the
implementation namespace and should be avoided as such. That's why in
NetBSD we introduced setprogname() and getprogname(). On systems without
__progname, they provided a clean abstraction without messing with the
implementation namespace. On platforms with __progname, but without
getprogname, the latter is trivially implemented as returning __progname
and setprogname is a nop.

Joerg
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