[LTP] [RFC] shell wrappers for tst_checkpoint

[Jan Stancek]

----- Original Message -----
> From: "Stanislav Kholmanskikh" <stanislav.kholmanskikh@oracle.com>
> To: ltp@lists.linux.it
> Cc: "vasily isaenko" <vasily.isaenko@oracle.com>
> Sent: Wednesday, 1 June, 2016 4:34:51 PM
> Subject: [LTP] [RFC] shell wrappers for tst_checkpoint
> 
> Hi!
> 
> There is a need to use the tst_checkpoint interface from shell, but
> we don't have wrappers for it (yet).
> 
> Patch 1 of the series contains one possible implementation for that,
> patch 2 - an example of usage in the context of the memcg_functional test
> case.
> 
> I'd like to get some feedback from LTP users.

If we don't plan to support oldlib, we should document that shell
checkpoints will work only with newlib C testcases, since oldlib
currently doesn't use LTP_IPC_PATH and file has different layout
(there is no results struct).

> 
> My primary concern is about two issues:
> 
> 1. The new test API for C is cool and takes the responsibility on
>    maintaining the infrastructure for tst_checkpoint. However, I couldn't
>    find
>    a way to implement something similar in shell, so I switched back to using
>    two separate functions for that - TST_CHECKPOINT_SETUP,
>    TST_CHECKPOINT_CLEANUP.
> 
>    There may be a better way...
> 
> 2. What is the best location for the new supplemental binaries
> (tst_checkpoint_wait,
> tst_checkpoint_wake)? tools/apicmds/ltpapicmd.c or separate source files in
> testcases/lib/ (similar to tst_sleep)?
> 
> Thanks.
> 
> 
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