From 453d13296d84472e6317472c2b27015b3ca612c4 Mon Sep 17 00:00:00 2001
From: Mike Frysinger <vapier@gentoo.org>
Date: Sat, 19 Nov 2011 02:43:25 -0500
Subject: [PATCH] rc: usage: do not output non-printable short options in usage

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
---
 src/rc/_usage.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/src/rc/_usage.c b/src/rc/_usage.c
index 8aa1806c..96c2d1a1 100644
--- a/src/rc/_usage.c
+++ b/src/rc/_usage.c
@@ -24,6 +24,7 @@
  */
 
 #include "version.h"
+#include <ctype.h>
 
 #if lint
 #  define _noreturn
@@ -59,6 +60,7 @@ usage(int exit_status)
 	char *lo;
 	char *p;
 	char *token;
+	char val[4] = "-?,";
 
 #ifdef usagestring
 	printf(usagestring);
@@ -70,8 +72,9 @@ usage(int exit_status)
 #endif
 	printf("\n\nOptions: [" getoptstring "]\n");
 	for (i = 0; longopts[i].name; ++i) {
-		len = printf("  -%c, --%s %s", longopts[i].val, longopts[i].name,
-		    has_arg[longopts[i].has_arg]);
+		val[1] = longopts[i].val;
+		len = printf("  %3s --%s %s", isprint(longopts[i].val) ? val : "",
+		    longopts[i].name, has_arg[longopts[i].has_arg]);
 
 		lo = p = xstrdup(longopts_help[i]);
 		while ((token = strsep(&p, "\n"))) {