Libc-1158.20.4.tar.gz

[apple/libc.git] / gen / sigsetops.c

diff --git a/gen/sigsetops.c b/gen/sigsetops.c
index e9019dc5ece2838535bb0312b2b9d1b75cd33ece..842dc79668e1f43a830a4f87ff00151812592e34 100644 (file)
--- 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);
 }