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

1 files changed, 39 insertions, 0 deletions

diff --git a/libc/signal/sigandset.c b/libc/signal/sigandset.c
new file mode 100644
index 000000000..4e1abd969
--- /dev/null
+++ b/libc/signal/sigandset.c
@@ -0,0 +1,39 @@
+/* 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>
+
+/* Combine sets LEFT and RIGHT by logical AND and place result in DEST.  */
+int
+sigandset (dest, left, right)
+     sigset_t *dest;
+     const sigset_t *left;
+     const sigset_t *right;
+{
+  if (dest == NULL || left == NULL || right == NULL)
+    {
+      __set_errno (EINVAL);
+      return -1;
+    }
+
+  return __sigandset (dest, left, right);
+}