From: Daniel Barkalow <barkalow@iabervon.org>
Date: Mon, 10 Oct 2005 20:14:31 GMT
Subject: Re: [RFC] Cleaning up die() error messages
Message-ID: <Pine.LNX.4.63.0510101603520.23242@iabervon.org>
In-Reply-To: <20051010105008.GB30202@gentoo.org>

On Mon, 10 Oct 2005, Elfyn McBratney wrote:

> 	[C sources]
> 	static char *prog;
> 	..
> 	static inline void set_prog_name (char *argv0)
> 	{
> 		prog = strrchr(argv0, '/');
> 		if (prog)
> 			prog++;
> 		else
> 			prog = argv0;
> 	}
> 	..
> 	int main (int argc, char **argv)
> 	{
> 		set_prog_name(argv[0]);
> 		..
> 		if (!do_bar())
> 			die("%s: do_bar() failed", prog);
> 		..
> 	}

Just put set_prog_name() next to die(), and have die() write "prog: " at 
the beginning if set_prog_name() got called. Assuming it's useful at all 
to show the name of the program, it's not going to be less useful if the 
error is actually found in a library function called by the program.

	-Daniel
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