X-Git-Url: https://git.saurik.com/apple/libc.git/blobdiff_plain/734aad71947a79037af64f74c683f5eb36fe6065..2be56ee90c5c5bee77895b8787a43e894249002b:/gen/sigsetops.c

diff --git a/gen/sigsetops.c b/gen/sigsetops.c
index e9019dc..842dc79 100644
--- a/gen/sigsetops.c
+++ b/gen/sigsetops.c
@@ -3,8 +3,6 @@
  *
  * @APPLE_LICENSE_HEADER_START@
  * 
- * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
- * 
  * 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
@@ -65,6 +63,7 @@
 #undef sigdelset
 #undef sigismember
 
+int
 sigemptyset(set)
 	sigset_t *set;
 {
@@ -72,6 +71,7 @@ sigemptyset(set)
 	return (0);
 }
 
+int
 sigfillset(set)
 	sigset_t *set;
 {
@@ -79,6 +79,7 @@ sigfillset(set)
 	return (0);
 }
 
+int
 sigaddset(set, signo)
 	sigset_t *set;
 	int signo;
@@ -87,10 +88,13 @@ sigaddset(set, signo)
 		errno = EINVAL;
 		return(-1);
 	}
+	if (signo == 0)
+		return(0);
 	*set |= sigmask(signo);
 	return (0);
 }
 
+int
 sigdelset(set, signo)
 	sigset_t *set;
 	int signo;
@@ -99,10 +103,13 @@ sigdelset(set, signo)
 		errno = EINVAL;
 		return(-1);
 	}
+	if (signo == 0)
+		return(0);
 	*set &= ~sigmask(signo);
 	return (0);
 }
 
+int
 sigismember(set, signo)
 	const sigset_t *set;
 	int signo;
@@ -111,5 +118,7 @@ sigismember(set, signo)
 		errno = EINVAL;
 		return(-1);
 	}
-	return ((*set & ~sigmask(signo)) != 0);
+	if (signo == 0)
+		return(0);
+	return ((*set & sigmask(signo)) != 0);
 }