--- Libc/Libc-320/gen/sigsetops.c
+++ Libc/Libc-262/gen/sigsetops.c
@@ -3,22 +3,19 @@
  *
  * @APPLE_LICENSE_HEADER_START@
  * 
- * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
+ * The contents of this file constitute Original Code as defined in and
+ * are subject to the Apple Public Source License Version 1.1 (the
+ * "License").  You may not use this file except in compliance with the
+ * License.  Please obtain a copy of the License at
+ * http://www.apple.com/publicsource and read it before using this file.
  * 
- * This file contains Original Code and/or Modifications of Original Code
- * as defined in and that are subject to the Apple Public Source License
- * Version 2.0 (the 'License'). You may not use this file except in
- * compliance with the License. Please obtain a copy of the License at
- * http://www.opensource.apple.com/apsl/ and read it before using this
- * file.
- * 
- * The Original Code and all software distributed under the License are
- * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * This Original Code and all software distributed under the License are
+ * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
- * Please see the License for the specific language governing rights and
- * limitations under the License.
+ * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
+ * License for the specific language governing rights and limitations
+ * under the License.
  * 
  * @APPLE_LICENSE_HEADER_END@
  */
@@ -65,7 +62,6 @@
 #undef sigdelset
 #undef sigismember
 
-int
 sigemptyset(set)
 	sigset_t *set;
 {
@@ -73,7 +69,6 @@
 	return (0);
 }
 
-int
 sigfillset(set)
 	sigset_t *set;
 {
@@ -81,7 +76,6 @@
 	return (0);
 }
 
-int
 sigaddset(set, signo)
 	sigset_t *set;
 	int signo;
@@ -94,7 +88,6 @@
 	return (0);
 }
 
-int
 sigdelset(set, signo)
 	sigset_t *set;
 	int signo;
@@ -107,7 +100,6 @@
 	return (0);
 }
 
-int
 sigismember(set, signo)
 	const sigset_t *set;
 	int signo;
@@ -116,5 +108,5 @@
 		errno = EINVAL;
 		return(-1);
 	}
-	return ((*set & sigmask(signo)) != 0);
+	return ((*set & ~sigmask(signo)) != 0);
 }