From mboxrd@z Thu Jan  1 00:00:00 1970
Date: Mon, 12 Apr 2010 23:20:39 -0600
To: "Fans of the OS Plan 9 from Bell Labs" <9fans@9fans.net>,
	"Skip Tavakkolian" <9nut@9netics.com>
From: "EBo" <ebo@sandien.com>
Message-ID: <twig.1271136039.93205@swcp.com>
In-Reply-To: <e3133b4aa2092177ec9aea2613499998@9netics.com>
References: <twig.1271072334.96091@swcp.com>
Subject: Re: [9fans] 9vx patch to read environment var PLAN9
Topicbox-Message-UUID: 0096051c-ead6-11e9-9d60-3106f5b1d025

Skip Tavakkolian <9nut@9netics.com> said:

> > but both
> > of the hard-coded paths in 9vx main.c are obviously in RSC's home directories
>
> it's not hardcoded;

What?  The findroot code reads:

static char*
findroot(void)
{
	static char cwd[1024];
	int i;
	char buf[1024];
	char *dir[] = {
		cwd,
		"/Users/rsc/9vx",
		"/home/rsc/plan9/4e"
	};

	if(getcwd(cwd, sizeof cwd) == nil){
		oserrstr();
		panic("getcwd: %r");
	}

	for(i=0; i<nelem(dir); i++){
		snprint(buf, sizeof buf, "%s/386/bin/rc", dir[i]);
		if(access(buf, 0) >= 0)
			return dir[i];
	}
	return nil;
}

"/Users/rsc/9vx","/home/rsc/plan9/4e" are most certainly hard coded locations,
and will likely only be default on rsc's machines.

> you can use -r as Russ said.  the difference is:
> "use default unless -r is given" vs.  "use default unless
> getenv(NINEROOT) is given".  -r makes it very obvious what the root is
> and probably will work better for un-unix-like environments.

Put another way, what are the default locations?

Also, it would probably be "use default unless getenv(NINEROOT) or -r is
given".  Also, getenv works on Windoz.  What un-unix-like environments are you
referring to?

> but at any rate, you have the sources and are free to change things
> locally to suit your taste.

true, but will these patches be accepted upstream?  If I was looking to just
build this for myself I would not be bothering any of you, I'm trying to
figure out what would be useful to include upstream.  I guess I should not
have posted this to the list, but simply taken it up with Russ off-list since
it is his code.

  EBo --