+
+int create_file(const char *path)
+{
+ int ret;
+
+ if (!path) {
+ return -1;
+ }
+
+ ret = creat(path, S_IRWXU);
+ if (ret < 0) {
+ perror("creat");
+ return -1;
+ }
+
+ ret = close(ret);
+ if (ret < 0) {
+ perror("close");
+ return -1;
+ }
+
+ return 0;
+}
+
+int wait_on_file(const char *path)
+{
+ int ret;
+ struct stat buf;
+
+ if (!path) {
+ return -1;
+ }
+
+ for (;;) {
+ ret = stat(path, &buf);
+ if (ret == -1 && errno == ENOENT) {
+ ret = poll(NULL, 0, 10); /* 10 ms delay */
+ /* Should return 0 everytime */
+ if (ret) {
+ if (ret < 0) {
+ perror("perror");
+ } else {
+ fprintf(stderr,
+ "poll return value is larger than zero\n");
+ }
+ return -1;
+ }
+ continue; /* retry */
+ }
+ if (ret) {
+ perror("stat");
+ return -1;
+ }
+ break; /* found */
+ }
+
+ return 0;
+}