changes to kernel sigaction struct handling in preparation for mips port

[musl] / src / signal / sigdelset.c

#include <signal.h>
#include <errno.h>

int sigdelset(sigset_t *set, int sig)
{
        unsigned s = sig-1;
        if (s >= 8*sizeof(sigset_t) || s-32U<3) {
                errno = EINVAL;
                return -1;
        }
        set->__bits[s/8/sizeof *set->__bits] &=~(1UL<<(s&8*sizeof *set->__bits-1));
        return 0;
}