[9fans] Oh, I almost forgot...

[9fans] Oh, I almost forgot...

[Dan Cross]

In changing around newns(), I added a command to help in debugging.  It's
turned out to be fairly useful generally, and I've installed it as auth/newns.
Here's the source:

	- Dan C.

#include <u.h>
#include <libc.h>
#include <auth.h>

void
usage(void)
{
	fprint(2, "Usage: newns [ -f file ] command.\n");
	exits("usage");
}

void
main(int argc, char *argv[])
{
	char	*nsfile;

	nsfile = "/lib/namespace";
	ARGBEGIN {
	case 'f':
		nsfile = ARGF();
		break;
	default:
		usage();
		break;
	} ARGEND
	if (argc == 0)
		usage();
	newns(getuser(), nsfile);
	exec(argv[0], argv);
	sysfatal("exec: %s: %r", argv[0]);
}