[src/trunk]: src/usr.bin/vmstat Fix error handling confusion between error an...

[pgoyette <pgoyette%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/7d5881821ef9
branches:  trunk
changeset: 350085:7d5881821ef9
user:      pgoyette <pgoyette%NetBSD.org@localhost>
date:      Wed Jan 04 01:29:18 2017 +0000

description:
Fix error handling confusion between error and errno

diffstat:

 usr.bin/vmstat/vmstat.c |  15 +++++++--------
 1 files changed, 7 insertions(+), 8 deletions(-)

diffs (37 lines):

diff -r c58c3cb27438 -r 7d5881821ef9 usr.bin/vmstat/vmstat.c
--- a/usr.bin/vmstat/vmstat.c   Wed Jan 04 01:06:26 2017 +0000
+++ b/usr.bin/vmstat/vmstat.c   Wed Jan 04 01:29:18 2017 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: vmstat.c,v 1.213 2017/01/04 01:06:26 pgoyette Exp $ */
+/* $NetBSD: vmstat.c,v 1.214 2017/01/04 01:29:18 pgoyette Exp $ */
 
 /*-
  * Copyright (c) 1998, 2000, 2001, 2007 The NetBSD Foundation, Inc.
@@ -70,7 +70,7 @@
 #if 0
 static char sccsid[] = "@(#)vmstat.c   8.2 (Berkeley) 3/1/95";
 #else
-__RCSID("$NetBSD: vmstat.c,v 1.213 2017/01/04 01:06:26 pgoyette Exp $");
+__RCSID("$NetBSD: vmstat.c,v 1.214 2017/01/04 01:29:18 pgoyette Exp $");
 #endif
 #endif /* not lint */
 
@@ -2138,13 +2138,12 @@
        /* retrieve names of available histories */
        miblen = __arraycount(mib);
        error = sysctlnametomib("kern.hist", mib, &miblen);
-       if (error == ENOENT) {
-               warnx("kernel history is not compiled into the kernel.");
-               return;
-       }
        if (error != 0) {
-               err(1, "nametomib failed");
-               return;
+               if (errno == ENOENT) {
+                       warnx("kernel history is not compiled into the kernel.");
+                       return;
+               } else
+                       err(EXIT_FAILURE, "nametomib failed");
        }
  
        /* get the list of nodenames below kern.hist */