/** Allocate and initialize CT handler.
*
* @param veid CT ID.
* @return handler or NULL on error.
*/
vps_handler *vz_open(envid_t veid)
{
int vzfd, stdfd;
vps_handler *h = NULL;
stdfd = reset_std();
if ((vzfd = open(VZCTLDEV, O_RDWR)) < 0) {
logger(-1, errno, "Unable to open %s", VZCTLDEV);
logger(-1, 0, "Please check that vzdev kernel module is loaded"
" and you have sufficient permissions"
" to access the file.");
goto err;
}
h = calloc(1, sizeof(*h));
if (h == NULL)
goto err;
h->vzfd = vzfd;
h->stdfd = stdfd;
if (vz_env_create_ioctl(h, 0, 0) < 0 &&
(errno == ENOSYS || errno == EPERM))
{
logger(-1, 0, "Your kernel lacks support for virtual"
" environments or modules not loaded");
goto err;
}
return h;
err:
free(h);
if (vzfd != -1)
close(vzfd);
if (stdfd != -1)
close(stdfd);
return NULL;
}
/** Allocate and initialize CT handler.
*
* @param veid CT ID.
* @param param CT parameters.
* @return handler or NULL on error.
*/
vps_handler *vz_open(envid_t veid, vps_param *param)
{
vps_handler *h = NULL;
int ret = -1;
h = calloc(1, sizeof(*h));
if (h == NULL)
return NULL;
h->stdfd = reset_std();
#ifdef VZ_KERNEL_SUPPORTED
/* Find out if we are under OpenVZ or upstream kernel */
if (stat_file("/proc/vz") == 1)
ret = vz_do_open(h, param);
else
#endif
{
logger(0, 0, "Directory /proc/vz not found, assuming "
"non-OpenVZ kernel");
h->vzfd = -1;
#ifdef HAVE_UPSTREAM
ret = ct_do_open(h, param);
#else
logger(-1, 0, "No suitable kernel support compiled in");
#endif
}
if (!ret)
return h;
if (h->stdfd != -1)
close(h->stdfd);
free(h);
return NULL;
}