basename,dirname,freeramdisk,rx,raidautorun,runsv,chvt: skip "--" argument

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

coreutils/basename.c

@@ -51,6 +51,11 @@ int basename_main(int argc, char **argv)
 	size_t m, n;
 	char *s;
 
+	if (argv[1] && strcmp(argv[1], "--") == 0) {
+		argv++;
+		argc--;
+	}
+
 	if ((unsigned)(argc-2) >= 2) {
 		bb_show_usage();
 	}

libbb/single_argv.c

@@ -10,6 +10,8 @@
 
 char* FAST_FUNC single_argv(char **argv)
 {
+	if (argv[1] && strcmp(argv[1], "--") == 0)
+		argv++;
 	if (!argv[1] || argv[2])
 		bb_show_usage();
 	return argv[1];