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tlssrv: fix usage, dont cat

--- a/sys/src/cmd/tlssrv.c

+++ b/sys/src/cmd/tlssrv.c

@@ -30,7 +30,7 @@

 void

 usage(void)

 {

-	fprint(2, "usage: tlssrv -c cert [-D] [-l logfile] [-r remotesys] [cmd args...]\n");

+	fprint(2, "usage: tlssrv -c cert [-D] [-l logfile] [-r remotesys] cmd [args...]\n");

 	fprint(2, "  after  auth/secretpem key.pem > /mnt/factotum/ctl\n");

 	exits("usage");

 }

@@ -60,6 +60,9 @@

 		usage();

 	}ARGEND

+	if(*argv == nil)

+		usage();

+

 	if(cert == nil)

 		sysfatal("no certificate specified");

 	conn = (TLSconn*)mallocz(sizeof *conn, 1);

@@ -84,9 +87,6 @@

 	dup(fd, 0);

 	dup(fd, 1);

-

-	if(*argv == nil)

-		*--argv = "/bin/cat";

 	exec(*argv, argv);

 	reporter("can't exec %s: %r", *argv);

-- 

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