int main(){
//Reserved for the file descriptor
int fd;
//Reserved to check the failures for the following functions
int ret;
//Create the "dump" directory if it doesn't exist, only owner has (full) access
ret = mkdir("dump", 0700);
if(ret == -1){
perror("Error: Could not create dump folder.\n");
return -1;
}
//Open if "dump" is a directory, or fail
fd = open("dump", O_DIRECTORY);
//Check if open didn't fail
if(fd == -1){
perror("Error: open failed to open the 'dump' directory.\n");
return -1;
}
//Preparation for CRIU:
//Initial the request options
ret = criu_init_opts();
if(ret == -1){
perror("Error: criu_init_opts failed to inital the request options.\n");
return -1;
}
//Set the images directory, where they will be stored
criu_set_images_dir_fd(fd);
//Specify the CRIU service socket
criu_set_service_address("criu_service.socket");
//Specify how to connnect to service socket
criu_set_service_comm(CRIU_COMM_SK);
//To test whether the kernel support is up-to-dater
ret = criu_check();
if(ret < 0){
perror("Error: criu_check failed.\n");
return -1;
}
return 0;
}
int main(int argc, char *argv[])
{
int ret, fd;
criu_set_service_address("criu_service.socket");
puts("--- Check ---");
ret = criu_check();
if (ret < 0) {
what_err_ret_mean(ret);
return -1;
} else
puts("Success");
puts("--- Dump loop ---");
criu_init_opts();
criu_set_pid(atoi(argv[1]));
criu_set_log_file("dump.log");
criu_set_log_level(4);
fd = open("imgs_loop", O_DIRECTORY);
criu_set_images_dir_fd(fd);
ret = criu_dump();
if (ret < 0) {
what_err_ret_mean(ret);
return -1;
} else if (ret == 0)
puts("Success");
puts("--- Restore loop ---");
criu_init_opts();
criu_set_log_level(4);
criu_set_log_file("restore.log");
criu_set_images_dir_fd(fd);
ret = criu_restore();
if (ret < 0) {
what_err_ret_mean(ret);
return -1;
} else if (ret > 0) {
puts("Success");
printf("pid %d\n", ret);
}
puts("--- Dump myself ---");
criu_init_opts();
criu_set_leave_running(true);
criu_set_shell_job(true);
criu_set_images_dir_fd(open("imgs_test", O_DIRECTORY));
ret = criu_dump();
if (ret < 0) {
what_err_ret_mean(ret);
return -1;
} else {
puts("Success");
if (ret == 1)
puts("Restored");
}
return 0;
}
