[9fans] factotum problem fix

[pwfmfx@cna.ne.jp]

Hello,
I couldn't access to an auth server from /net.alt,
because factotum used only /net.

Here's my fix.
Replace bindnetcs(void) in factotum/util.c by the following:

-- from here --
/* bind in a specified network and cs */
static int
bindnetcseach(char *net, char *ipdev, char *cssrv)
{
	int srvfd;
	char buf[40];

	snprint(buf, sizeof buf, "%s/cs", net);
	if(access(buf, AEXIST) >= 0)
		return 0;

	if((srvfd = open(cssrv, ORDWR)) < 0)
		return -1;
	if(mount(srvfd, -1, net, MAFTER, "") < 0)
		return -1;
	close(srvfd);

	snprint(buf, sizeof buf, "%s/tcp", net);
	if(access(buf, AEXIST) < 0)
		bind(ipdev, net, MAFTER);
	return 0;
}

/* bind in the default network and cs */
static int
bindnetcs(void)
{
	if(bindnetcseach("/net", "#I", "#s/cs") < 0)
		return -1;
	bindnetcseach("/net.alt", "#I1", "#s/cs_net.alt");
	return 0;
}
-- end --

By the way, fd in _asgetticket() could be closed twice.
When an error occurs, _asgetticket() close(fd),
and a caller (auth/debug, factotum/p9sk1.c, ...) closes it again.

Thanks.
---
Mamoru Sato
pwfmfx@cna.ne.jp
pwfmfx@nurs.or.jp