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WebSVN – planix.SVN – Blame – /os/branches/feature_tlsv12/sys/src/cmd/auth/newns.c – Rev 2

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#include <u.h>
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#include <libc.h>
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#include <auth.h>
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void
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usage(void)
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{
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	fprint(2, "usage: newns [-ad] [-n namespace] [cmd [args...]]\n");
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	exits("usage");
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}
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static int
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rooted(char *s)
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{
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	if(s[0] == '/')
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		return 1;
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	if(s[0] == '.' && s[1] == '/')
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		return 1;
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	if(s[0] == '.' && s[1] == '.' && s[2] == '/')
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		return 1;
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	return 0;
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}
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void
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main(int argc, char **argv)
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{
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	extern int newnsdebug;
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	char *defargv[] = { "/bin/rc", "-i", nil };
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	char *nsfile, err[ERRMAX];
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	int add;
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	rfork(RFNAMEG);
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	add = 0;
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	nsfile = "/lib/namespace";
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	ARGBEGIN{
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	case 'a':
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		add = 1;
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		break;
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	case 'd':
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		newnsdebug = 1;
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		break;
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	case 'n':
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		nsfile = ARGF();
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		break;
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	default:
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		usage();
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		break;
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	}ARGEND
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	if(argc == 0)
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		argv = defargv;
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	if (add)
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		addns(getuser(), nsfile);
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	else
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		newns(getuser(), nsfile);
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	exec(argv[0], argv);
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	if(!rooted(argv[0])){
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		rerrstr(err, sizeof err);
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		exec(smprint("/bin/%s", argv[0]), argv);
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		errstr(err, sizeof err);
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	}
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	sysfatal("exec: %s: %r", argv[0]);
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}