From: Sami Kerola <kerolasa@iki.fi>
Date: Thu, 14 Jun 2012 18:17:51 +0000 (+0200)
Subject: include [optutils]: add exclusive_option() inline function
X-Git-Tag: v2.22-rc1~267^2~23
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=8f77d454a9c79e3de71575eb148fc32c767a2c39;p=thirdparty%2Futil-linux.git

include [optutils]: add exclusive_option() inline function

The exclusive_option() will unify how exclusive options are
determined.

Signed-off-by: Sami Kerola <kerolasa@iki.fi>
---

diff --git a/include/optutils.h b/include/optutils.h
index f66d669c86..fae28fd0d1 100644
--- a/include/optutils.h
+++ b/include/optutils.h
@@ -1,6 +1,9 @@
 #ifndef UTIL_LINUX_OPTUTILS_H
 #define UTIL_LINUX_OPTUTILS_H
 
+#include "c.h"
+#include "nls.h"
+
 static inline const char *option_to_longopt(int c, const struct option *opts)
 {
 	const struct option *o;
@@ -11,5 +14,21 @@ static inline const char *option_to_longopt(int c, const struct option *opts)
 	return NULL;
 }
 
+#ifndef OPTUTILS_EXIT_CODE
+# define OPTUTILS_EXIT_CODE EXIT_FAILURE
+#endif
+static inline void exclusive_option(int *what, const int how,
+				    const char *errmesg)
+{
+	if (*what == 0) {
+		*what = how;
+		return;
+	}
+	if (*what == how)
+		return;
+	errx(OPTUTILS_EXIT_CODE,
+	     _("options %s are mutually exclusive"), errmesg);
+}
+
 #endif