support: Add error checking to close system calls [BZ #21244]

1 files changed, 28 insertions, 0 deletions

diff --git a/support/xclose.c b/support/xclose.c
new file mode 100644
index 0000000000..c931e08421
--- /dev/null
+++ b/support/xclose.c
@@ -0,0 +1,28 @@
+/* close with error checking.
+   Copyright (C) 2017 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include <support/xunistd.h>
+#include <support/check.h>
+#include <errno.h>
+
+void
+xclose (int fd)
+{
+  if (close (fd) < 0 && errno != EINTR)
+    FAIL_EXIT1 ("close of descriptor %d failed: %m", fd);
+}