Re: program_invocation_name

[Szabolcs Nagy <nsz@port70.net>]

* Rich Felker <dalias@aerifal.cx> [2013-03-23 23:01:18 -0400]:
> > > for (s=t=argv[0]; *t; t++) if (*t=='/') s=t+1;
> > 
> > yes that makes sense assuming argv[0]!=0
> 
> I don't think argv[0]==0 is permitted, but if it is possible, we could
> add a check.

execl("./foo", (char*)0, (char*)0);

works here (argc==0 and argv[0]==0 in the executed process)

> > > P.S. If we do add these, we could certainly add the BSD names too as
> > > aliases.
> > 
> > bsd only has the short version (__progname)
> 
> Doesn't it also have __progname_full or something?

no, that's a gnu invention, added at the same time
as the program_invocation_name things

but yes we should probably support both if we support any