Fix up sig handling so it is more in sync with glibc behavior

1 files changed, 37 insertions, 0 deletions

diff --git a/libc/signal/sigisempty.c b/libc/signal/sigisempty.c
new file mode 100644
index 000000000..6d1de45a8
--- /dev/null
+++ b/libc/signal/sigisempty.c
@@ -0,0 +1,37 @@
+/* Copyright (C) 1991, 1996, 1997 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, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+#include <errno.h>
+#define __USE_GNU
+#include <signal.h>
+#define __need_NULL
+#include <stddef.h>
+
+/* Test whether SET is empty.  */
+int
+sigisemptyset (set)
+     const sigset_t *set;
+{
+  if (set == NULL)
+    {
+      __set_errno (EINVAL);
+      return -1;
+    }
+
+    return __sigisemptyset (set);
+}