#include <signal.h>
-#include <errno.h>
int sigismember(const sigset_t *set, int sig)
{
unsigned s = sig-1;
- if (s >= 8*sizeof(sigset_t) || sig-32U<3) {
- errno = EINVAL;
- return -1;
- }
+ if (s >= _NSIG-1) return 0;
return !!(set->__bits[s/8/sizeof *set->__bits] & 1UL<<(s&8*sizeof *set->__bits-1));
}