From 677ec86cef983a106c6e5d175f44b125858c3016 Mon Sep 17 00:00:00 2001
From: Karel Zak
Date: Mon, 19 Dec 2016 13:13:34 +0100
Subject: Use --help suggestion on invalid option

The current default is to print all usage() output. This is overkill
in many case.

Addresses: https://github.com/karelzak/util-linux/issues/338
Signed-off-by: Karel Zak <kzak@redhat.com>
---
 include/c.h | 6 ++++++
 1 file changed, 6 insertions(+)

(limited to 'include')

diff --git a/include/c.h b/include/c.h
index bf11d61ac..3f47dbdcb 100644
--- a/include/c.h
+++ b/include/c.h
@@ -212,6 +212,12 @@ errmsg(char doexit, int excode, char adderr, const char *fmt, ...)
 	exit(eval); \
 })
 
+#define errtryh(eval) __extension__ ({ \
+	fprintf(stderr, _("Try '%s -h' for more information.\n"), \
+			program_invocation_short_name); \
+	exit(eval); \
+})
+
 
 static inline __attribute__((const)) int is_power_of_2(unsigned long num)
 {
-- 
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