int container_disk_lock(struct lxc_container *c)
{
int ret;
if ((ret = lxclock(c->privlock, 0)))
return ret;
if ((ret = lxclock(c->slock, 0))) {
lxcunlock(c->privlock);
return ret;
}
return 0;
}
int main(int argc, char *argv[])
{
int ret;
struct lxc_lock *lock;
lock = lxc_newlock(NULL, NULL);
if (!lock) {
fprintf(stderr, "%d: failed to get unnamed lock\n", __LINE__);
exit(1);
}
ret = lxclock(lock, 0);
if (ret) {
fprintf(stderr, "%d: failed to take unnamed lock (%d)\n", __LINE__, ret);
exit(1);
}
ret = lxcunlock(lock);
if (ret) {
fprintf(stderr, "%d: failed to put unnamed lock (%d)\n", __LINE__, ret);
exit(1);
}
lxc_putlock(lock);
lock = lxc_newlock("/var/lib/lxc", mycontainername);
if (!lock) {
fprintf(stderr, "%d: failed to get lock\n", __LINE__);
exit(1);
}
struct stat sb;
// we don't create the file until the container is running, so this
// bit of the test needs to be changed
//char *pathname = "/run/lock/lxc/var/lib/lxc/" mycontainername;
char *pathname = "/run/lock/lxc/var/lib/lxc/";
ret = stat(pathname, &sb);
if (ret != 0) {
fprintf(stderr, "%d: filename %s not created\n", __LINE__,
pathname);
exit(1);
}
lxc_putlock(lock);
test_two_locks();
fprintf(stderr, "all tests passed\n");
exit(ret);
}
int container_mem_lock(struct lxc_container *c)
{
return lxclock(c->privlock, 0);
}
void test_two_locks(void)
{
struct lxc_lock *l;
pid_t pid;
int ret, status;
int p[2];
char c;
if (pipe(p) < 0)
exit(1);
if ((pid = fork()) < 0)
exit(1);
if (pid == 0) {
if (read(p[0], &c, 1) < 0) {
perror("read");
exit(1);
}
l = lxc_newlock("/tmp", "lxctest-sem");
if (!l) {
fprintf(stderr, "%d: child: failed to create lock\n", __LINE__);
exit(1);
}
if (lxclock(l, 0) < 0) {
fprintf(stderr, "%d: child: failed to grab lock\n", __LINE__);
exit(1);
}
fprintf(stderr, "%d: child: grabbed lock\n", __LINE__);
exit(0);
}
l = lxc_newlock("/tmp", "lxctest-sem");
if (!l) {
fprintf(stderr, "%d: failed to create lock\n", __LINE__);
exit(1);
}
if (lxclock(l, 0) < 0) {
fprintf(stderr, "%d; failed to get lock\n", __LINE__);
exit(1);
}
if (write(p[1], &c, 1) < 0) {
perror("write");
exit(1);
}
sleep(3);
ret = waitpid(pid, &status, WNOHANG);
if (ret == pid) { // task exited
if (WIFEXITED(status)) {
printf("%d exited normally with exit code %d\n", pid,
WEXITSTATUS(status));
if (WEXITSTATUS(status) == 0)
exit(1);
} else
printf("%d did not exit normally\n", pid);
return;
} else if (ret < 0) {
perror("waitpid");
exit(1);
}
kill(pid, SIGKILL);
wait(&status);
close(p[1]);
close(p[0]);
lxcunlock(l);
lxc_putlock(l);
}