prefer rb_syserr_fail

* file.c, io.c, util.c: prefer rb_syserr_fail with saved errno
  over setting errno then call rb_sys_fail, not to be clobbered
  potentially and to reduce thread local errno accesses.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@53264 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 1 insertions, 2 deletions

diff --git a/ext/io/console/console.c b/ext/io/console/console.c
index 94669307c6..fd3f03b6b4 100644
--- a/ext/io/console/console.c
+++ b/ext/io/console/console.c
@@ -280,8 +280,7 @@ ttymode(VALUE io, VALUE (*func)(VALUE), void (*setter)(conmode *, void *), void
     }
     if (status) {
 	if (status == -1) {
-	    errno = error;
-	    rb_sys_fail(0);
+	    rb_syserr_fail(error, 0);
 	}
 	rb_jump_tag(status);
     }