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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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char *namespace;
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void
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usage(void)
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{
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	fprint(2, "usage: auth/none [-n namespace] [cmd ...]\n");
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	exits("usage");
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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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	char cmd[256];
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	int fd;
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	ARGBEGIN{
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	case 'n':
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		namespace = EARGF(usage());
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		break;
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	default:
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		usage();
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	}ARGEND
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	if (rfork(RFENVG|RFNAMEG) < 0)
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		sysfatal("can't make new pgrp");
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	fd = open("#c/user", OWRITE);
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	if (fd < 0)
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		sysfatal("can't open #c/user");
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	if (write(fd, "none", strlen("none")) < 0)
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		sysfatal("can't become none");
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	close(fd);
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	if (newns("none", namespace) < 0)
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		sysfatal("can't build namespace");
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	if (argc > 0) {
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		strecpy(cmd, cmd+sizeof cmd, argv[0]);
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		exec(cmd, &argv[0]);
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		if (strncmp(cmd, "/", 1) != 0
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		&& strncmp(cmd, "./", 2) != 0
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		&& strncmp(cmd, "../", 3) != 0) {
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			snprint(cmd, sizeof cmd, "/bin/%s", argv[0]);
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			exec(cmd, &argv[0]);
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		}
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	} else {
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		strcpy(cmd, "/bin/rc");
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		execl(cmd, cmd, nil);
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	}
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	sysfatal(cmd);
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}