Hi all, 

I have a Mac with OS 10.13.6 and Xcode 10.1. I am following the instructions in the wiki to install Midas. 
I have installed openssl via MacPorts as per the instructions. But then I get an error related to open ssl 
when I try to compile Midas. See the results of cmake .. and make install 

Darrens-Mac-mini:build betacage$ cmake ..
-- MIDAS: cmake version: 3.16.3
-- MIDAS: CMAKE_INSTALL_PREFIX: /Users/betacage/packages/midas
-- MIDAS: Found ROOT version 6.18/04
-- MIDAS: Found ZLIB version 1.2.11
-- MIDAS: Found OpenSSL version 1.1.1d
-- MIDAS: MySQL not found
-- MIDAS: ODBC not found
-- MIDAS: Found SQLITE /usr/include/sqlite3.h
-- MIDAS: nvidia-smi not found
-- MIDAS example/experiment: MIDAS in-tree-build
-- MIDAS: Found ZLIB version 1.2.11
-- MIDAS example/experiment: Found ROOT version 6.18/04
-- Configuring done
-- Generating done
-- Build files have been written to: /Users/betacage/packages/midas/build
Darrens-Mac-mini:build betacage$ make install 
[  1%] Built target mfeo
[  3%] Built target mfe
[  4%] Built target rmana
[  5%] Built target manao
[  6%] Built target mana
[  6%] Built target git_revision_h
[ 30%] Built target objlib
[ 31%] Built target midas
[ 32%] Built target rmanao
[ 32%] Built target objlib-c-compat
[ 32%] Built target midas-c-compat
[ 33%] Built target midas-shared
[ 35%] Built target rmlogger
[ 36%] Linking CXX executable mhttpd
Undefined symbols for architecture x86_64:
  "_OPENSSL_init_ssl", referenced from:
      _mg_mgr_init in mongoose6.cxx.o
  "_SSL_CTX_set_options", referenced from:
      _mg_set_ssl in mongoose6.cxx.o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
make[2]: *** [progs/mhttpd] Error 1
make[1]: *** [progs/CMakeFiles/mhttpd.dir/all] Error 2
make: *** [all] Error 2


I hope that this is the right forum to submit this kind of reports.
Any idea what do I have to do to continue ? Thanks is advance !

Berta 

> > ... support for certbot
> 
> The certbot tool to use instead of certbot is this: https://github.com/ndilieto/uacme
> 
> K.O.


HI Stefan and Konstantin, 

Thanks a lot for your messages. Sorry for my late reply, I only work on this project from Tuesday to Thursdays. I have 
run " make cmake" instead of "cd build; cmake" and this is the output regarding mhttpd:

/Library/Developer/CommandLineTools/usr/bin/c++  -O2 -g -DNDEBUG -Wl,-search_paths_first -Wl,-
headerpad_max_install_names  CMakeFiles/mhttpd.dir/mhttpd.cxx.o CMakeFiles/mhttpd.dir/mongoose6.cxx.o 
CMakeFiles/mhttpd.dir/mgd.cxx.o CMakeFiles/mhttpd.dir/__/mscb/src/mscb.cxx.o  -o mhttpd  -lsqlite3 ../libmidas.a 
/usr/lib/libssl.dylib /usr/lib/libcrypto.dylib -lz -lsqlite3 /usr/lib/libssl.dylib /usr/lib/libcrypto.dylib -lz 
Undefined symbols for architecture x86_64:
  "_OPENSSL_init_ssl", referenced from:
      _mg_mgr_init in mongoose6.cxx.o
  "_SSL_CTX_set_options", referenced from:
      _mg_set_ssl in mongoose6.cxx.o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)


I see that in your outputs the openssl libs are in /opt/local/lib/ while mine are in /usr/lib/, and that is the only difference. 
I have checked that the libraries libssl.dylib and libcrypto.dylib are in my /usr/lib/, and indeed they are, so I don't 
understand the reason for the error, I will continue investigating. 

Thanks 

Berta 

Hi all, 

I have updated our daq computer to the latest OS 10.15 with the idea that then I will get all our daq 
programs running and will not need to update again in years to come. 
But now I am running unto even more problems trying to compile Midas. 
OS 10.15.3, Xcode 11.3 with commad line tools 

Darrens-Mac-mini:~ betacage$ cd packages/midas/build/
Darrens-Mac-mini:build betacage$ cmake .. 
-- MIDAS: cmake version: 3.16.3
-- The C compiler identification is AppleClang 11.0.0.11000033
-- The CXX compiler identification is AppleClang 11.0.0.11000033
-- Check for working C compiler: /Library/Developer/CommandLineTools/usr/bin/cc
-- Check for working C compiler: /Library/Developer/CommandLineTools/usr/bin/cc -- works
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Detecting C compile features
-- Detecting C compile features - done
-- Check for working CXX compiler: /Library/Developer/CommandLineTools/usr/bin/c++
-- Check for working CXX compiler: /Library/Developer/CommandLineTools/usr/bin/c++ -- works
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- MIDAS: CMAKE_INSTALL_PREFIX: /Users/betacage/packages/midas
-- MIDAS: Found ROOT version 6.18/04
-- Found ZLIB: /usr/lib/libz.dylib  
-- MIDAS: Found ZLIB version 
-- MIDAS: Found OpenSSL version 1.1.1d
-- MIDAS: MySQL not found
-- MIDAS: ODBC not found
-- MIDAS: SQLITE not found
-- MIDAS: nvidia-smi not found
-- Found Git: /usr/bin/git (found version "2.21.0 (Apple Git-122.2)") 
-- MIDAS example/experiment: MIDAS in-tree-build
-- MIDAS: Found ZLIB version 
-- MIDAS example/experiment: Found ROOT version 6.18/04
-- Configuring done
-- Generating done
-- Build files have been written to: /Users/betacage/packages/midas/build
Darrens-Mac-mini:build betacage$ make install
[  1%] Building CXX object CMakeFiles/mfeo.dir/src/mfe.cxx.o
In file included from /Users/betacage/packages/midas/src/mfe.cxx:15:
In file included from /Users/betacage/packages/midas/include/mfe.h:13:
/Users/betacage/packages/midas/include/midas.h:159:10: fatal error: 'pthread.h' file not found
#include <pthread.h>
         ^~~~~~~~~~~
1 error generated.
make[2]: *** [CMakeFiles/mfeo.dir/src/mfe.cxx.o] Error 1
make[1]: *** [CMakeFiles/mfeo.dir/all] Error 2


I guess that I am maybe the first one trying to install MIDAS in this OS, so I am willing to help as much as I 
can with getting this going. I have found a solution to this by downgrading Xcode to version 10 
https://stackoverflow.com/questions/58524715/failing-to-compile-a-c-application-under-macos-catalina-10-15
If you don't have other solutions I will try to do that tomorrow.

Thanks 

Berta 

> 
> Ok, in this case, I will update my office mac mini to 10.15.
> 
> K.O.


Hi Konstantin, 

Any luck with Midas in OS 10.15? 
I have downgraded to Xcode 10.2.1 as suggested in the post linked in my first post, without any luck, I keep getting the same pthead.h error. 
MY gcc uses the 10.15 sdk despite having v 10.2.1 for Xcode and command line tools 

Darrens-Mac-mini:~ betacage$ gcc --version
Configured with: --prefix=/Applications/Xcode.app/Contents/Developer/usr --with-gxx-include-
dir=/Library/Developer/CommandLineTools/SDKs/MacOSX10.15.sdk/usr/include/c++/4.2.1
Apple LLVM version 10.0.1 (clang-1001.0.46.4)
Target: x86_64-apple-darwin19.3.0
Thread model: posix
InstalledDir: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin


and that is where I suspect the problem is. Will keep investigating next week. Thanks for your help.

Berta 

> > Any luck with Midas in OS 10.15? 
> 
> Best I can tell, the problem is not in midas: pthread.h should be there, somewhere.
> 
> K.O.


HI Konstain, 

Thanks for your reply. I have been investigating this issue of pthread in OS 10.15.  Found this forum post 
https://github.com/wjakob/nori/issues/16

that seem to suggest that pthread.h is in a different directory from OS 10.14 and on. And the end of the post the 
developer suggests that he has found a way to fix the Cmake to work so I have checked his code updates in here 
https://github.com/wjakob/nori/commit/be46cccc01a75b21dad1a3f61baa108fe644fc4b

I have added his lines 


if(APPLE)
   # Try to auto-detect a suitable SDK
   execute_process(COMMAND bash -c "xcodebuild -version -sdk | grep MacOSX | grep Path | head -n 1 | cut -f 2 -
d ' '" OUTPUT_VARIABLE CMAKE_OSX_SYSROOT)
   string(REGEX REPLACE "(\r?\n)+$" "" CMAKE_OSX_SYSROOT "${CMAKE_OSX_SYSROOT}")
   string(REGEX REPLACE "^.*X([0-9.]*).sdk$" "\\1" CMAKE_OSX_DEPLOYMENT_TARGET 
"${CMAKE_OSX_SYSROOT}")
 endif()

to my local pakages/midas/CMakeLists.txt and run cmake .., make install again but now I get a different error 

[  1%] Building CXX object CMakeFiles/mfeo.dir/src/mfe.cxx.o
clang: error: invalid version number in '-mmacosx-version-
min=/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/DriverKit19.0.sdk'
clang: warning: using sysroot for 'DriverKit' but targeting 'MacOSX' [-Wincompatible-sysroot]


I will continue investigating this issue tomorrow, but please let me know if you have any suggestions.

Also my version of cmake is 3.16.3

Thanks 

Berta 

> Hi, Stefan & co - now that midas is c++11 and c++11 comes with a threads library, should we 
> switch midas to use the c++11 threads instead of pthreads? (Of course on Linux c++11 
> threads are a layer on top of pthreads, the best I know).
> 
> This should remove the dependency on pthreads.h and use a more native implementation of 
> threads on MacOS and Windows. (again, the best I can tell).
> 
> Of course this depends on c++11 threads having all the functions we need. Specifically, "lock 
> with timeout" is useful to deal with "gah! everything stopped! what do I do!", a problem 
> bedeviling midas in the early days (and still happens today!). Current midas kills everything 
> after 5 minutes of deadlock - then the user knows how to restart everything and the developer 
> has core dumps to look at. (to see which program/thread holds the lock and would not give it 
> up).
> 
> Any thoughts on this?
> 
> K.O.

Hi, I just wanted to say that I have seen this post and maybe that is the solution to the pthreads compiler problem in OS 10.15, but 
of course I am a total amateur in here. Thanks for thinking about this and I will wait and hold to see what gets decided. Thanks

Berta  

> For your reference, here on my MacOSX 10.14.6 with XCode 11.3.1 the pthread.h file is present in locations listed below.
> 
> Did you execute "xcode-select --install" ?
> 
> 
> ~$ locate pthread.h
> /Applications/Xcode.app/Contents/Developer/Platforms/AppleTVOS.platform/Developer/SDKs/AppleTVOS.sdk/usr/include/pthread/pthread.h
> /Applications/Xcode.app/Contents/Developer/Platforms/AppleTVOS.platform/Developer/SDKs/AppleTVOS.sdk/usr/include/pthread.h
> /Applications/Xcode.app/Contents/Developer/Platforms/AppleTVSimulator.platform/Developer/SDKs/AppleTVSimulator.sdk/usr/include/pthread/pthread.h
> /Applications/Xcode.app/Contents/Developer/Platforms/AppleTVSimulator.platform/Developer/SDKs/AppleTVSimulator.sdk/usr/include/pthread.h
> /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include/pthread/pthread.h
> /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include/pthread.h
> /Applications/Xcode.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS.sdk/usr/include/pthread/pthread.h
> /Applications/Xcode.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS.sdk/usr/include/pthread.h
> /Applications/Xcode.app/Contents/Developer/Platforms/WatchSimulator.platform/Developer/SDKs/WatchSimulator.sdk/usr/include/pthread/pthread.h
> /Applications/Xcode.app/Contents/Developer/Platforms/WatchSimulator.platform/Developer/SDKs/WatchSimulator.sdk/usr/include/pthread.h
> /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS.sdk/usr/include/pthread/pthread.h
> /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS.sdk/usr/include/pthread.h
> /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator.sdk/usr/include/pthread/pthread.h
> /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator.sdk/usr/include/pthread.h
> /Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/pthread/pthread.h
> /Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/pthread.h

Hi Stefan,

Thanks for looking into this. Yes, I have done  "xcode-select --install"

This is my output when I try to locate pthread.h

Darrens-Mac-mini:~ betacage$ locate pthread.h
/Applications/Xcode.app/Contents/Developer/Platforms/AppleTVOS.platform/Developer/SDKs/AppleTVOS.sdk/usr/include/pthread/pthread.h
/Applications/Xcode.app/Contents/Developer/Platforms/AppleTVOS.platform/Developer/SDKs/AppleTVOS.sdk/usr/include/pthread.h
/Applications/Xcode.app/Contents/Developer/Platforms/AppleTVSimulator.platform/Developer/SDKs/AppleTVSimulator.sdk/usr/include/pthread/pthread.h
/Applications/Xcode.app/Contents/Developer/Platforms/AppleTVSimulator.platform/Developer/SDKs/AppleTVSimulator.sdk/usr/include/pthread.h
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include/pthread/pthread.h
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include/pthread.h
/Applications/Xcode.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS.sdk/usr/include/pthread/pthread.h
/Applications/Xcode.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS.sdk/usr/include/pthread.h
/Applications/Xcode.app/Contents/Developer/Platforms/WatchSimulator.platform/Developer/SDKs/WatchSimulator.sdk/usr/include/pthread/pthread.h
/Applications/Xcode.app/Contents/Developer/Platforms/WatchSimulator.platform/Developer/SDKs/WatchSimulator.sdk/usr/include/pthread.h
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS.sdk/usr/include/pthread/pthread.h
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS.sdk/usr/include/pthread.h
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator.sdk/usr/include/pthread/pthread.h
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator.sdk/usr/include/pthread.h
/Library/Developer/CommandLineTools/SDKs/MacOSX10.14.sdk/usr/include/pthread/pthread.h
/Library/Developer/CommandLineTools/SDKs/MacOSX10.14.sdk/usr/include/pthread.h
/Library/Developer/CommandLineTools/SDKs/MacOSX10.15.sdk/usr/include/pthread/pthread.h
/Library/Developer/CommandLineTools/SDKs/MacOSX10.15.sdk/usr/include/pthread.h

and this is what I see in my SDKs folder 

Darrens-Mac-mini:SDKs betacage$ pwd
/Library/Developer/CommandLineTools/SDKs
Darrens-Mac-mini:SDKs betacage$ ls
MacOSX.sdk	MacOSX10.14.sdk	MacOSX10.15.sdk

So it looks like in this computer one needs to read the version of the SDK as pthread.h is not in MacOSX.sdk but in MacOSX10.15.sdk

Thanks 

Berta 

> Another thought: Can you delete the midas build directory and run cmake again? Like
> 
> $ cd midas/build
> $ rm -rf *
> $ cmake ..
> $ make VERBOSE=1
> 
> If you have the old build cache and upgraded your OS in meantime, the cache needs to be rebuild. The VERBOSE 
> flag tells you the compiler options, and you see where the compiler looks for the SDK directory.
> 
> Cheers,
> Stefan

Hi Stefan, 

Thanks again for your reply. Yes! the suggestion of rebuilding the cache was the right one, this is the output of cmake ..

Darrens-Mac-mini:~ betacage$ cd packages/midas/build/
Darrens-Mac-mini:build betacage$ rm -rf *
Darrens-Mac-mini:build betacage$ cmake ..
-- MIDAS: cmake version: 3.16.3
-- The C compiler identification is AppleClang 11.0.0.11000033
-- The CXX compiler identification is AppleClang 11.0.0.11000033
-- Check for working C compiler: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/cc
-- Check for working C compiler: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/cc -- works
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Detecting C compile features
-- Detecting C compile features - done
-- Check for working CXX compiler: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/c++
-- Check for working CXX compiler: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/c++ -- works
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- MIDAS: CMAKE_INSTALL_PREFIX: /Users/betacage/packages/midas
-- MIDAS: Found ROOT version 6.18/04
-- Found ZLIB: /usr/lib/libz.dylib (found version "1.2.11") 
-- MIDAS: Found ZLIB version 1.2.11
-- Found OpenSSL: /usr/lib/libcrypto.dylib (found version "1.1.1d")  
-- MIDAS: Found OpenSSL version 1.1.1d
-- MIDAS: MySQL not found
-- MIDAS: ODBC not found
-- MIDAS: SQLITE not found
-- MIDAS: nvidia-smi not found
-- Setting default build type to "RelWithDebInfo"
-- Found Git: /usr/bin/git (found version "2.21.1 (Apple Git-122.3)") 
-- MIDAS example/experiment: MIDAS in-tree-build
-- MIDAS: Found ZLIB version 1.2.11
-- MIDAS example/experiment: Found ROOT version 6.18/04
-- Configuring done
-- Generating done
-- Build files have been written to: /Users/betacage/packages/midas/build


Unfortunately running make VERBOSE=1 the compilation crashes, with the following error 

[ 39%] Linking CXX executable mhttpd
cd /Users/betacage/packages/midas/build/progs && /Applications/CMake.app/Contents/bin/cmake -E cmake_link_script CMakeFiles/mhttpd.dir/link.txt 
--verbose=1
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/c++  -O2 -g -DNDEBUG -isysroot 
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.15.sdk -Wl,-search_paths_first -Wl,-
headerpad_max_install_names  CMakeFiles/mhttpd.dir/mhttpd.cxx.o CMakeFiles/mhttpd.dir/mongoose6.cxx.o CMakeFiles/mhttpd.dir/mgd.cxx.o 
CMakeFiles/mhttpd.dir/__/mscb/src/mscb.cxx.o  -o mhttpd  ../libmidas.a /usr/lib/libssl.dylib /usr/lib/libcrypto.dylib -lz 
ld: cannot link directly with dylib/framework, your binary is not an allowed client of /usr/lib/libcrypto.dylib for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
make[2]: *** [progs/mhttpd] Error 1
make[1]: *** [progs/CMakeFiles/mhttpd.dir/all] Error 2
make: *** [all] Error 2


Libcrypto seems to be part of the OpenSSL, so I am back to the original problem again. I did install OpenSSL via MacPorts. 

I have found this tread regarding this problem. But have to go and pick up my kids from school, so I don't have time to investigate today.
https://stackoverflow.com/questions/58446253/xcode-11-ld-error-your-binary-is-not-an-allowed-client-of-usr-lib-libcrypto-dy

Thanks again for staying with me and for responding so promptly. 

Berta 

> Now you are stuck with openssl, which is optional for mhttpd. If you only use mhttpd locally, you maybe don't need SSL support. In that case you can jus do
> 
> [midas/build] $ cmake -D NO_SSL=1 ..
> 
> To disable that. If you do need SSL, maybe you can try to install openssl11 via mac ports.
> 
> Stefan

Thanks Stefan. 
If I run the compilation with the flag NO_SSL it works just fine. Still I think that Mhttpd is going to be important for us in the future as we may want to control the experiment remotely, so I will keep trying. But at least I 
can get started.

Thanks 

Berta 

Thanks Konstantin,

I will keep an eye for the next release so that I can update my Midas to include ssl libraries.

Thanks 



> > > [midas/build] $ cmake -D NO_SSL=1 ..
> > If I run the compilation with the flag NO_SSL it works just fine. ...
> 
> FYI, the mongoose616 branch now has support for using the mbedtls https library,
> this library seems to build easily from sources and removes our dependency
> on where/how/which openssl library is installed. I hope to have this included
> in the next release of midas.
> 
> K.O.

Hi Nick,

I confirm that this issue appears when using the MIDAS history driver. The issue does not appear when using the MYSQL history driver.

One solution is to give each frontend instance a different Event ID (see example code below for doing this in frontend_init). The history system did still seem to be confused by the existing FeDummy equipments/events even after making this change. However, after changing EQ_NAME from FeDummy to FeDum (i.e. starting from a clean state history-wise) things behaved normally.

I will note that some experiments definitely have a need for the "-i" method, especially those that run on distributed clusters.

Ben


```
INT frontend_init()
{
   sprintf(eq_name, "%s%02d", EQ_NAME, get_frontend_index());

   // Ensure each FE gets a different Event ID in the history system (951, 952 etc)
   char keyname[128];
   HNDLE hkey;
   int status;
   sprintf(keyname, "/Equipment/%s/Common/Event ID", eq_name);
   status = db_find_key(hDB, 0, keyname, &hkey);
   if (status != DB_SUCCESS) abort();

   WORD new_ev_id = 950 + get_frontend_index();
   status = db_set_data_index(hDB, hkey, &new_ev_id, 2, 0, TID_WORD);
   if (status != DB_SUCCESS) abort();
   return SUCCESS;
}
```

The information you want is in the ODB:
* "/System/Transition/status" is the overall integer status code.
* "/System/Transition/error" is the overall error message string.

There is also per-client status information in the ODB:
* "/System/Transition/Clients/<client_name>/status"
* "/System/Transition/Clients/<client_name>/error"

The ODB variable "/Runinfo/State" is a symptom of starting/stopping a run, rather than the cause.

In C++, one uses `cm_transition()` to start/stop runs.

In python code you can use the `start_run()` and `stop_run()` functions from `midas.client`: https://bitbucket.org/tmidas/midas/src/00ff089a836100186e9b26b9ca92623e672f0030/python/midas/client.py#lines-793:808

We use the lazylogger for something similar to this. You can specify the path to a custom script, and it will be run for each midas file that gets written:
https://midas.triumf.ca/MidasWiki/index.php/Lazylogger#Using_a_script
This means that you don't have to wait until the end of the run to start processing.

If the ROOT conversion is going to be slow, but you have a batch system available, you could use the lazylogger script to submit a job to the batch system for each file.

> 
> > Hi,
> > 
> > I was wondering if there is a "mechanism" to run an executable
> > file after each subrun is closed...
> > 
> > I need to convert .mid.lz4 subrun files to ROOT (TTree) files;
> > 
> > Thanks,
> > Gennaro

> if I use the script button, the logic_controller program is immediately deleted by MIDAS.

This is indeed very curious, and I can't reproduce it on my test experiment. Can you redirect stdout and stderr from the logic_controller program into a file, to see how far the program gets? If it gets to the while loop at the end, then it would be useful to add some debug statements to see what condition causes it to exit the loop.

Are there any relevant messages in the midas message log about the program being killed? What's the value of "/Programs/logic_controller/Watchdog timeout"? 

I think it would be useful to find the minimal example that exhibits this behaviour.

What happens if your logic controller code is simply the 17 lines below? What happens if you create another script button that only starts the logic controller, not any of the other programs? etc. Gradually re-add features until you hit the problem (or scream in horror if it breaks with 17 lines of C++ and a 1 line shell script).



#include "midas.h"
#include "stdio.h"

int main() {
   cm_connect_experiment("", "", "logic_controller", NULL);

   do {
     int status = cm_yield(100);
     printf("cm_yield returned %d\n", status);
     if (status == SS_ABORT || status == RPC_SHUTDOWN)
       break;
   } while (!ss_kbhit());

   cm_disconnect_experiment();

   return 0;
}

For those unfamiliar, odbxx is the interface that looks like a C++ map, but automatically syncs with the ODB - https://midas.triumf.ca/MidasWiki/index.php/Odbxx.

I've added a new feature that is similar to the existing odb::connect() function, but works like the old db_check_record(). The new odb::connect_and_fix_structure() function:
- keeps the existing value of any keys that are in both the ODB and your code
- creates any keys that are in your code but not yet in the ODB
- deletes any keys that are in the ODB but not your code
- updates the order of keys in the ODB to match your code

This will hopefully make it easier to automate ODB structure changes when you add/remove keys from a frontend.

The new feature is currently in the develop branch, and should be included in the next release.

> midas_hatfe_1  | Mongoose web server listening on http address "localhost:8080", passwords OFF, hostlist OFF
> midas_hatfe_1  | [mhttpd,ERROR] [mhttpd.cxx:19160:mongoose_listen,ERROR] Cannot mg_bind address "[::1]:8080"

It looks like mhttpd managed to bind to the IPv4 address (localhost), but not the IPv6 address (::1). If you don't need it, try setting "/Webserver/Enable IPv6" to false.

Hi Francesco,

Can you send me an example file to look at please? Either attached to the elog or sent directly to bsmith@triumf.ca

Thanks,
Ben

> It seems that the second write operation "overlaps" the first one...

Hi Gennaro,

In principle the same issue can happen in C++ code, but is much less likely as the callbacks get executed  more quickly (partly due to C++/python in general, and partly because the python code does some extra work to make the interface more user-friendly). The C++ code at the end of this message adds a 100ms sleep to the callback and can result in output like this when you do quick edits of "Test[0-19]" in odbedit.

Element 1 is 0
Element 2 is 0
Element 3 is 0
Element 4 is 0
Element 5 is 0
Element 6 is 0
Element 7 is 1
Element 8 is 1
Element 9 is 1
etc...


I agree that this can be a really nasty source of bugs if you need to react to every change. I'll add a warning to the python docstrings, but I can't think of a way to make this more robust at the midas level - I think we'd need some sort of ODB "snapshot" system...









#include "midas.h"

void watch_fn(HNDLE hDB, HNDLE hKey, int index, void *info) {
  DWORD data = 0;
  INT buf_size = sizeof(data);
  db_get_data_index(hDB, hKey, &data, &buf_size, index, TID_DWORD);
  printf("Element %d is %u\n", index, data);
  ss_sleep(100);
}

int main() {
  HNDLE hDB, hClient, hTestKey;

  std::string host, expt;
  cm_get_environment(&host, &expt);
  cm_connect_experiment(host.c_str(), expt.c_str(), "test_odb", nullptr);
  cm_get_experiment_database(&hDB, &hClient);

  static const DWORD numValues = 20;
  DWORD data[numValues] = {};
  db_set_value(hDB, 0, "Test", data, sizeof(DWORD) * numValues, numValues, TID_DWORD);
  db_find_key(hDB, 0, "Test", &hTestKey);
  db_watch(hDB, hTestKey, watch_fn, nullptr);

  printf("Press any key to exit loop...\n");

  while (!ss_kbhit()) {
    cm_yield(1);
  }

  db_unwatch_all();
  db_delete_key(hDB, hTestKey, FALSE);
  cm_disconnect_experiment();

  return 0;
}