shithub: nvi

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print a usage error if no options were specified

--- a/nvi.c

+++ b/nvi.c

@@ -76,6 +76,10 @@

 	if(argc != 1)

 		usage();

+	if(cmd != Cinfo && ov == nil && oa == nil){

+		fprint(2, "at least one option (-i, -a, -v) has be specified\n");

+		threadexitsall("usage");

+	}

 	vid = argv[0];

 	if(strncmp(argv[0], "http", 4) == 0){

 		if(strstr(argv[0], "youtu") != nil && (vid = strrpbrk(argv[0], "/=")) != nil)