fix integer overflow in WIFSTOPPED macro

[musl] / src / signal / sigset.c

diff --git a/src/signal/sigset.c b/src/signal/sigset.c
index 1b6b38f..f3e8c40 100644 (file)
--- a/src/signal/sigset.c
+++ b/src/signal/sigset.c
@@ -1,19 +1,18 @@
 #include <signal.h>
-#include <stdlib.h>
 
 void (*sigset(int sig, void (*handler)(int)))(int)
 {
        struct sigaction sa, sa_old;
-       sigset_t mask;
+       sigset_t mask, mask_old;
 
        sigemptyset(&mask);
        if (sigaddset(&mask, sig) < 0)
                return SIG_ERR;
        
        if (handler == SIG_HOLD) {
-               if (sigaction(sig, NULL, &sa_old) < 0)
+               if (sigaction(sig, 0, &sa_old) < 0)
                        return SIG_ERR;
-               if (sigprocmask(SIG_BLOCK, &mask, &mask) < 0)
+               if (sigprocmask(SIG_BLOCK, &mask, &mask_old) < 0)
                        return SIG_ERR;
        } else {
                sa.sa_handler = handler;
@@ -21,8 +20,8 @@ void (*sigset(int sig, void (*handler)(int)))(int)
                sigemptyset(&sa.sa_mask);
                if (sigaction(sig, &sa, &sa_old) < 0)
                        return SIG_ERR;
-               if (sigprocmask(SIG_UNBLOCK, &mask, &mask) < 0)
+               if (sigprocmask(SIG_UNBLOCK, &mask, &mask_old) < 0)
                        return SIG_ERR;
        }
-       return sigismember(&mask, sig) ? SIG_HOLD : sa_old.sa_handler;
+       return sigismember(&mask_old, sig) ? SIG_HOLD : sa_old.sa_handler;
 }