sync hardware time to system time when start pod

Signed-off-by: Lai Jiangshan <jiangshanlai@gmail.com>

src/init.c

@@ -620,6 +620,7 @@ static int hyper_start_pod(char *json, int length)
 	if (pod->init_pid)
 		fprintf(stdout, "pod init_pid exist %d\n", pod->init_pid);
 
+	hyper_sync_time_hctosys();
 	if (hyper_parse_pod(pod, json, length) < 0) {
 		fprintf(stderr, "parse pod json failed\n");
 		return -1;

src/util.c

@@ -99,6 +99,18 @@ int hyper_copy_dir(char *src, char *dest) {
 	return -1;
 }
 
+void hyper_sync_time_hctosys() {
+	int pid;
+	pid = fork();
+	if (pid < 0) {
+		perror("fail to fork to copy directory");
+	} else if (pid == 0) {
+		execlp("/busybox", "hwclock", "-s", NULL);
+		perror("exec hwclock -s command failed");
+		exit(-1);
+	}
+}
+
 int hyper_find_sd(char *addr, char **dev) {
 	struct dirent **list;
 	struct dirent *dir;

src/util.h

@@ -19,6 +19,7 @@ int hyper_setup_env(struct env *envs, int num);
 int hyper_find_sd(char *addr, char **dev);
 int hyper_list_dir(char *path);
 int hyper_copy_dir(char *src, char *dst);
+void hyper_sync_time_hctosys();
 void online_cpu(void);
 void online_memory(void);
 int hyper_mkdir(char *path);