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#include "torture.h"
#include <errno.h>
#include <stdio.h>
#include <cmocka.h>
#include <unistd.h>
#include <stdlib.h>
#define MAX_SOCKETS 4
static int setup(void **state)
{
int ret;
char str[10];
torture_setup_socket_dir(state);
ret = snprintf(str, 10, "%d", MAX_SOCKETS);
if (ret < 0) {
return ret;
}
ret = setenv("SOCKET_WRAPPER_MAX_SOCKETS", str, 1);
return ret;
}
static int teardown(void **state)
{
torture_teardown_socket_dir(state);
return 0;
}
static int _socket(int *_s)
{
int s;
s = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
if (s < 0) {
return -1;
}
*_s = s;
return 0;
}
static void test_max_sockets(void **state)
{
int rc;
int s[MAX_SOCKETS+1] = { 0 };
int i;
(void) state; /* unused */
for (i = 0; i < MAX_SOCKETS; i++) {
rc = _socket(&s[i]);
assert_return_code(rc, errno);
}
/* no free space for sockets left */
rc = _socket(&s[MAX_SOCKETS]);
assert_int_equal(rc, -1);
assert_int_equal(errno, ENFILE);
/* closing a socket frees up space */
close(s[0]);
rc = _socket(&s[0]);
assert_return_code(rc, errno);
/* but just one */
rc = _socket(&s[MAX_SOCKETS]);
assert_int_equal(rc, -1);
assert_int_equal(errno, ENFILE);
for (i = 0; i < MAX_SOCKETS; i++) {
close(s[i]);
}
}
int main(void) {
int rc;
const struct CMUnitTest max_sockets_tests[] = {
cmocka_unit_test_setup_teardown(test_max_sockets,
setup, teardown),
};
rc = cmocka_run_group_tests(max_sockets_tests, NULL, NULL);
return rc;
}
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