On Sun, Apr 26, 2026 at 09:45:06AM -0400, Jon Maloy wrote:
> 
> 
> On 2026-04-21 02:25, David Gibson wrote:
> > Start implementing pesto in earnest.  Create a control/configuration
> > socket in passt.  Have pesto connect to it and retrieve a server greeting
> > Perform some basic version checking.
> 
> [...]
> 
> >   /**
> >    * conf() - Process command-line arguments and set configuration
> >    * @c:		Execution context
> > @@ -1189,9 +1227,10 @@ void conf(struct ctx *c, int argc, char **argv)
> >   		{"migrate-exit", no_argument,		NULL,		29 },
> >   		{"migrate-no-linger", no_argument,	NULL,		30 },
> >   		{"stats", required_argument,		NULL,		31 },
> > +		{"conf-path",	required_argument,	NULL,		'c' },
> >   		{ 0 },
> >   	};
> > -	const char *optstring = "+dqfel:hs:F:I:p:P:m:a:n:M:g:i:o:D:S:H:461t:u:T:U:";
> > +	const char *optstring = "+dqfel:hs:c:F:I:p:P:m:a:n:M:g:i:o:D:S:H:461t:u:T:U:";
> >   	const char *logname = (c->mode == MODE_PASTA) ? "pasta" : "passt";
> >   	bool opt_t = false, opt_T = false, opt_u = false, opt_U = false;
> >   	char userns[PATH_MAX] = { 0 }, netns[PATH_MAX] = { 0 };
> > @@ -1449,6 +1488,13 @@ void conf(struct ctx *c, int argc, char **argv)
> >   			c->fd_tap = -1;
> >   			break;
> > +		case 'c':
> > +			ret = snprintf(c->control_path, sizeof(c->control_path),
> > +				       "%s", optarg);
> > +			if (ret <= 0 || ret >= (int)sizeof(c->sock_path))
> 
> s/sizeof(c->sock_path)/sizeof(c->config_path)/

Oops, yes.

[snip]
> > @@ -122,5 +128,42 @@ int main(int argc, char **argv)
> >   	debug("debug_flag=%d, path=\"%s\"", debug_flag, argv[optind]);
> > -	die("pesto is not implemented yet");
> > +	if ((s = socket(AF_UNIX, SOCK_STREAM, 0)) < 0)
> > +		die_perror("Failed to create AF_UNIX socket");
> > +
> > +	ret = snprintf(a.sun_path, sizeof(a.sun_path), "%s", argv[optind]);
> > +	if (ret <= 0 || ret >= (int)sizeof(a.sun_path))
> > +		die("Invalid socket path \"%s\"", argv[1]);
> 
> s/argv[1]/argv[optind]  for consistency.

And again.

This is not just for consistency, but for correctness (of the error
message).  Depending on the command line, optind may not be equal to
1.

-- 
David Gibson (he or they)	| I'll have my music baroque, and my code
david AT gibson.dropbear.id.au	| minimalist, thank you, not the other way
				| around.
http://www.ozlabs.org/~dgibson