static int prepare_ipc_var(int pid)
{
int fd, ret;
IpcVarEntry *var;
pr_info("Restoring IPC variables\n");
fd = open_image(CR_FD_IPC_VAR, O_RSTR, pid);
if (fd < 0)
return -1;
ret = pb_read_one(fd, &var, PB_IPC_VAR);
close_safe(&fd);
if (ret <= 0) {
pr_err("Failed to read IPC namespace variables\n");
return -EFAULT;
}
ipc_sysctl_req(var, CTL_PRINT);
ret = ipc_sysctl_req(var, CTL_WRITE);
ipc_var_entry__free_unpacked(var, NULL);
if (ret < 0) {
pr_err("Failed to prepare IPC namespace variables\n");
return -EFAULT;
}
return 0;
}
static int dump_ipc_var(struct cr_img *img)
{
IpcVarEntry var = IPC_VAR_ENTRY__INIT;
int ret = -1;
var.n_sem_ctls = 4;
var.sem_ctls = xmalloc(pb_repeated_size(&var, sem_ctls));
if (!var.sem_ctls)
goto err;
ret = ipc_sysctl_req(&var, CTL_READ);
if (ret < 0) {
pr_err("Failed to read IPC variables\n");
goto err;
}
ret = pb_write_one(img, &var, PB_IPC_VAR);
if (ret < 0) {
pr_err("Failed to write IPC variables\n");
goto err;
}
err:
xfree(var.sem_ctls);
return ret;
}
