/** 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;
}
/** Get CT status.
*
* @param h CT handler.
* @param veid CT ID.
* @return 1 - CT is running
* 0 - CT is stopped.
*/
int vps_is_run(vps_handler *h, envid_t veid)
{
int ret;
int errno;
if (veid == 0)
return 1;
ret = vz_env_create_ioctl(h, veid, VE_TEST);
if (ret < 0 && (errno == ESRCH || errno == ENOTTY))
return 0;
else if (ret < 0)
logger(-1, errno, "error on vz_env_create_ioctl(VE_TEST)");
return 1;
}
static int real_env_stop(vps_handler *h, envid_t veid, const char *vps_root,
int stop_mode)
{
int ret;
if ((ret = vz_chroot(vps_root)))
return ret;
if ((ret = vz_setluid(veid)))
return ret;
close_fds(1, h->vzfd, -1);
if ((ret = vz_env_create_ioctl(h, veid, VE_ENTER)) < 0) {
if (errno == ESRCH)
return 0;
logger(-1, errno, "Container enter failed");
return ret;
}
close(h->vzfd);
switch (stop_mode) {
case M_REBOOT:
{
char *argv[] = {"reboot", NULL};
execvep(argv[0], argv, NULL);
break;
}
case M_HALT:
{
char *argv[] = {"halt", NULL};
execvep(argv[0], argv, NULL);
break;
}
case M_KILL:
{
syscall(__NR_reboot, LINUX_REBOOT_MAGIC1,
LINUX_REBOOT_MAGIC2,
LINUX_REBOOT_CMD_POWER_OFF, NULL);
break;
}
}
return 0;
}
int main(int argc, char **argv)
{
int veid, vzfd, ret;
int qwe = 10;
int cld_pid;
if (argc == 1) {
printf("Specify container ID\n");
return -1;
}
veid = atoi(argv[1]);
if ((vzfd = open("/dev/vzctl", O_RDWR)) < 0) {
perror("open vzctl");
return -1;
}
// printf("Press any to create child and proceed...\n");
if (cld_pid = fork()) {
int status;
printf("Waiting for child with pid %d.\n", cld_pid);
wait(&status);
printf("Child terminated.\n");
} else {
int cld_cnt_pid, cnt_status;
printf("Entering container %d...\n", veid);
if ((ret = vz_setluid(veid)))
return ret;
ret = vz_env_create_ioctl(vzfd, veid, VE_ENTER);
if (ret < 0) {
printf("Failed to enter container %d\n", veid);
if (errno == ESRCH)
ret = VZ_VE_NOT_RUNNING;
else
ret = VZ_ENVCREATE_ERROR;
goto env_err;
}
printf("Successfully entered container %d.\n", veid);
printf("Creating child inside container...\n");
if (cld_cnt_pid = fork()) {
/* while(qwe--) {
printf("Sleeping for 1 second...\n");
sleep(1);
printf("%d seconds left...\n", qwe);
}
*/ printf("Child: Waiting for child with pid %d created inside container...\n", cld_cnt_pid);
wait(&cnt_status);
printf("Child: Child created inside container - terminated.\n");
} else {
int i = 0;
printf("Child inside continer created successfully. Sleep for 1 sec.\n");
if (daemon(0, 0) == -1) {
perror("daemonize failed:");
return -1;
}
while(i++ < 10) {
printf("Sleeping for 1 second...\n");
sleep(1);
}
return 0;
}
}
return 0;
env_err:
return -1;
}