int main(int argc, const char *argv[])
{
if (nice(2*MAX_PRIO) != -1)
handle_error("Error: error checking for syscalls should be implemented.\n");
if (nice(-2*MAX_PRIO) != -1)
handle_error("Error: error checking for syscalls should be implemented.\n");
if (setpriority(-1,0) != -1)
handle_error("Error: error checking for syscalls should be implemented.\n");
if (getpriority(-1) != -1)
handle_error("Error: error checking for syscalls should be implemented.\n");
if (setpriority(getpid(),2*MAX_PRIO) != -1)
handle_error("Error: error checking for syscalls should be implemented.\n");
if (setpriority(getpid(),-1) != -1)
handle_error("Error: error checking for syscalls should be implemented.\n");
if (setaffinity(-1, 0) != -1)
handle_error("Error: error checking for syscalls should be implemented.\n");
if (setaffinity(getpid(), -1) != -1)
handle_error("Error: error checking for syscalls should be implemented.\n");
if (setaffinity(getpid(), 3) != -1)
handle_error("Error: error checking for syscalls should be implemented.\n");
if (getaffinity(-1) != -1)
handle_error("Error: error checking for syscalls should be implemented.\n");
printf(stdout, "hw4-test-err succeeded\n");
exit();
}
static int
find_set_size (void)
{
/* There is considerable controversy about how to determine the size
of the kernel CPU mask. The probing loop below is only intended
for testing purposes. */
for (int num_cpus = 64; num_cpus <= INT_MAX / 2; ++num_cpus)
{
cpu_set_t *set = CPU_ALLOC (num_cpus);
size_t size = CPU_ALLOC_SIZE (num_cpus);
if (set == NULL)
{
printf ("error: CPU_ALLOC (%d) failed\n", num_cpus);
return -1;
}
if (getaffinity (size, set) == 0)
{
CPU_FREE (set);
return num_cpus;
}
if (errno != EINVAL)
{
printf ("error: getaffinity for %d CPUs: %m\n", num_cpus);
CPU_FREE (set);
return -1;
}
CPU_FREE (set);
}
puts ("error: Cannot find maximum CPU number");
return -1;
}