{ fd_set set; struct timeval timeout;

/* Initialize the file descriptor set. */ FD_ZERO (&set); FD_SET (filedes, &set);

/* Initialize the timeout data structure. */ timeout.tv_sec = seconds; timeout.tv_usec = 0;

/* select returns 0 if timeout, 1 if input available, -1 if error. */ return TEMP_FAILURE_RETRY (select (FD_SETSIZE, &set, NULL, NULL, &timeout)); }

int main (void) { fprintf (stderr, "select returned %d.\n", input_timeout (STDIN_FILENO, 5)); return 0; }

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