[USG5_4] (sigblock): Use |, not &.

diff --git a/src/syssignal.h b/src/syssignal.h
index 25ef1c029247f5515705109bc5f3de78d6bbae8c..374034df24670564112ebea246b01d7431793c03 100644 (file)
--- a/src/syssignal.h
+++ b/src/syssignal.h
@@ -71,7 +71,7 @@ sigset_t sys_sigsetmask (sigset_t new_mask);
 #ifdef USG5_4
 
 #ifndef sigblock
-#define sigblock(sig) (sigprocmask (SIG_BLOCK, SIGEMPTYMASK & sig, NULL))
+#define sigblock(sig) (sigprocmask (SIG_BLOCK, SIGEMPTYMASK | sig, NULL))
 #endif
 
 #define sigunblock(sig) (sigprocmask (SIG_SETMASK, SIGFULLMASK & ~(sig), NULL))