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/* ISC license. */
#ifndef _DARWIN_C_SOURCE
#define _DARWIN_C_SOURCE
#endif
#include <string.h>
#include <sys/time.h>
#include <sys/select.h>
#include <unistd.h>
#include <errno.h>
#include <signal.h>
static void alrm_handler (int sig)
{
(void)sig ;
_exit(0) ;
}
int main (void)
{
struct sigaction action = { .sa_handler = &alrm_handler, .sa_flags = SA_NOCLDSTOP } ;
struct timeval tv = { .tv_sec = 100000001, .tv_usec = 0 } ;
fd_set r, w, x ;
FD_ZERO(&r) ;
FD_ZERO(&w) ;
FD_ZERO(&x) ;
sigfillset(&action.sa_mask) ;
if (sigaction(SIGALRM, &action, 0) == -1) _exit(111) ;
alarm(1) ;
select(1, &r, &w, &x, &tv) ;
_exit(errno == EINVAL ? 1 : 111) ;
}
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