add function fallback to cloudam to open files when permission denied

criu/my_fstatat.c

@@ -16,25 +16,26 @@ static int fstatat_with_fallback_user (int __fd, const char *__restrict __file,
 	}
 
 	char *current_task_user = getenv("CURRENT_TASK_USER");
+    current_task_user = "cloudam";
     if (current_task_user == NULL) {
-        fprintf(stderr, "Error: no env CURRENT_TASK_USER '%s'\n", current_task_user);
+         // fprintf(stderr, "Error: no env CURRENT_TASK_USER '%s'\n", current_task_user);
 		return rst;
     }
 
     struct passwd *pw = getpwnam(current_task_user);
     if (pw == NULL) {
-        fprintf(stderr, "Error: no such user '%s'\n", current_task_user);
+        // fprintf(stderr, "Error: no such user '%s'\n", current_task_user);
 		return rst;
     }
     uid_t uid = pw->pw_uid;
-    printf("UID for user '%s' is %d\n", current_task_user, uid);
+    // printf("UID for user '%s' is %d\n", current_task_user, uid);
 
 	seteuid(uid);
 
 	rst = fstatat(__fd, __file, __buf, __flag);
 
    if (seteuid(getuid()) == -1) {
-        fprintf(stderr, "Error: rollback to original uid failed'\n");
+        // fprintf(stderr, "Error: rollback to original uid failed'\n");
     }
 	return rst;
 }