commit c2a145ff33017a14e46f32720dd3435d95283ef7
author Paul Lawrence <paullawrence@google.com> Wed May 15 09:42:04 2019 -0700
committer Paul Lawrence <paullawrence@google.com> Wed May 15 10:16:15 2019 -0700
tree 39e258a9f6d3f6f60668563374f1a7a07bceeff1
parent 19e74b3d1fb033a4dda3e55e04239c6feb10863e

Fail startCheckpoint if checkpoints not supported

Bug: 131815738
Test: vdc checkpoint startCheckpoint 2 succeeds on blueline
      It fails with a modified fstab with no checkpoint=fs flag

Change-Id: I6d55810a1f711a670f18fbd10d8779c15f4e3cba

Checkpoint.cpp

diff --git a/Checkpoint.cpp b/Checkpoint.cpp
index ba9af11..56ec782 100644
--- a/Checkpoint.cpp
+++ b/Checkpoint.cpp
@@ -125,6 +125,10 @@
 }
 
 Status cp_startCheckpoint(int retry) {
+    bool result;
+    if (!cp_supportsCheckpoint(result).isOk() || !result)
+        return error(ENOTSUP, "Checkpoints not supported");
+
     if (retry < -1) return error(EINVAL, "Retry count must be more than -1");
     std::string content = std::to_string(retry + 1);
     if (retry == -1) {