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#include <sys/types.h>
#include <signal.h>
#include <limits.h>
int sigaddset(sigset_t * set, int signo)
{
/* TODO: fail with EINVAL if signo is not a valid signal number */
size_t byte = signo % CHAR_BIT;
int bit = signo / CHAR_BIT;
set->__bits[byte] |= (1 << bit);
return 0;
}
/*
POSIX(1)
*/
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