 11 Sep 2018, Stefan Ritt, Forum, Launching an executable script from the sequencer
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> > Dear experts,
> > is there any way to launch an executable script on the host computer from the MIDAS
> > sequencer? If not, is there any interest to develop such a feature?
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25 Sep 2018, Stefan Ritt, Suggestion, Self-resetting alarm class
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> If you run an external script anyway, you can also call "odbedit -c alarm" to
> reset all alarms. Or you could try to set the "Triggered" entry of that certain
> alarm to 0 (again, with odbedit), that could also work.
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25 Sep 2018, Stefan Ritt, Suggestion, Self-resetting alarm class
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> I was planning to use the alarm system to display an information banner when a
> certain valve is open, but I would like it to go away again when the valve is
> closed.
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25 Sep 2018, Stefan Ritt, Forum, Implementing MIDAS on a Satellite
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> Hello Everybody,
>
> I am a member of a satellite team with a scientific payload and I am considering
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31 Oct 2018, Stefan Ritt, Bug Report, Side panel auto-expands when history page updates
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>
>
> One can collapse the side panel when looking at history pages with the button in
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02 Nov 2018, Stefan Ritt, Bug Report, Side panel auto-expands when history page updates
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> I apologise for miss using the word refresh. The re-appearing sidebar was also seen with the automatic
> reload, I have implemented your fix here and it now works great!
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02 Nov 2018, Stefan Ritt, Bug Report, Side panel auto-expands when history page updates
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> Joseph's original message says that the problem is with the standard MIDAS history page, which currently use a complete reload
> when refreshing. Of course we are planning to update this history pages to only grab what it needs (as well as changing the
> plotting to use newer HTML plotting). But until that upgrade happens your fix is helpful for the history page.
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30 Nov 2018, Stefan Ritt, Info, status of self-signed https certificates
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> In the mean time, we continue to recommend that mhttpd should be used behind a password protected https proxy (i.e. apache
> httpd, etc).
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11 Dec 2018, Stefan Ritt, Info, Partial refactoring of ODB code
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All makes sense to me. I agree to proceed with the refactoring.
One additional comment: In the 90's when I developed this code, locking was expensive. On a decent computer you could do a couple of thousand lock operations |
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21 Dec 2018, Stefan Ritt, Bug Report, mhttpd - custom page - RHEL/Fedora
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I implemented that fix. Thank you to Andreas. Creating "Custom" directory from the web now does
not have that problem any more.
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27 Dec 2018, Stefan Ritt, Info, Partial refactoring of ODB code
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> I am not sure this is quite true. The CPU can execute 3000 million operations per second (3GHz CPU, assuming 1 op/Hz),
> so 1 lock operation is worth 3000 normal operations. Of course cache misses and branch mispredictions mess up
> this simple arithmetic...
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27 Dec 2018, Stefan Ritt, Bug Report, mhttpd - custom page - RHEL/Fedora
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> BTW, "the fix" in mhttpd unconditionally creates /Custom/Path and sets it to the value of $MIDASSYS. This path
> seems to be prepended to all file paths, so this fix also breaks the normal use of /Custom/xxx that contain the full
> path name of the file to serve...
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22 Jan 2019, Stefan Ritt, Bug Report, Custom script with new MIDAS
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I just check that feature and found it's still working as expected.
On trap I fell in was that a custom page needs the <input type=submit ...> to be imbedded into a pair of
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 07 Feb 2019, Stefan Ritt, Info, History panels in custom pages 
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A new tag has been implemented to display history panels in custom pages, integrated in the
new custom page design from 2017. The full documentation can be found at
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20 Feb 2019, Stefan Ritt, Info, odb needs protection against ctrl-c
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Not sure if you realized, but there is a two-stage Ctrl-C handling inside midas. The first time you hit ctrl-c, the handler just sets a flag for the main
event loop, so that the program can gracefully exit without trouble. This is
done inside cm_ctrlc_handler(), which sets _ctrlc_pressed true if called. Then cm_yield() tests this flag and returns RPC_SHUTDOWN if so. I agree not very |
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20 Feb 2019, Stefan Ritt, Info, odb needs protection against ctrl-c
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Have you read what I wrote? The current ctrl-c handler just sets the _ctrlc_pressed flag. It might be that some programs do not correctly interprete the
return of cm_yield(), certainly the frontend does it correctly. On the SECOND ctrl-c, the program gets
(internally) hard aborted, equivalent to calling abort(). Not sure if the code works everywhere, I see now that cm_yield(() should maybe return SS_ABORT |
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04 Mar 2019, Stefan Ritt, Info, Gyrations of custom pages and ODB /Custom/Path
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Parsing all URL in mhttpd to prevent /etc/passwd etc. to be returned is tricky, because people can use escape sequences etc. Therefore I think it is much
better to restrict file access
on the file system level when opening a file. The only escape there one could have is "..", which can be tested easily.
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04 Mar 2019, Stefan Ritt, Info, Gyrations of custom pages and ODB /Custom/Path
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Sounds reasonable to me.
Stefan
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05 Mar 2019, Stefan Ritt, Info, Gyrations of custom pages and ODB /Custom/Path
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First, I did not propose to give up the /Custom tree in the ODB, sorry for the misunderstanding. We still need it in order to display the menu with the
custom pages at the left side navigation bar. In principle all can stay like it is, except we remove /Custom/Path and rewrite the file server to restrict
it only
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05 Mar 2019, Stefan Ritt, Info, Gyrations of custom pages and ODB /Custom/Path
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> - mhttpd cannot serve /etc/passwd by default as "/" is forbidden in file names added to /Custom/Path.
You do this with a simple
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