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  2145   12 Apr 2021 Isaac Labrie BoulayForumClient gets immediately removed when using a script button.
Hi all,

I'm running into a curious problem when I try to run a program using my custom 
script button. I have been using a script button to start my DAQ, this button 
has always worked. It starts by exporting an absolute path to scripts and then 
runs scripts, my frontend, my analyzer, and mlogger relative to this path.

I recently added a line of code to run a new script "logic_controller". If I run 
the script_daq from my terminal (./start_daq), mhttpd accepts the client and the 
program works as intended. But, if I use the script button, the logic_controller 
program is immediately deleted by MIDAS. It can be seen appearing in the status 
page clients list and then immediately gets deleted. This is a client that runs 
on the local experiment host.

What might be the issue? What is the difference between running the script 
through the terminal as opposed to running it through the mhttpd button?

I have added a picture of my simple script and the logic_controller code.

Any help would be greatly appreciated.

Cheers.

Isaac
Attachment 1: logicCtrl.cpp 
//
// Isaac Labrie-Boulay
//
// Program that enables the modification of gate and delay values 
// in the logic unit
//
// Last Edit: 2021-030-29
//

#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <math.h>
#include <stdint.h>
#include <iostream>

using namespace std;

#include "CAEN_PLULib.h"
#include "midas.h"
#include "assert.h"
#include "mfe.h"
#include "mvmestd.h"
#include "odbxx.h"
//#include "CAEN_PLULib_TEST.h"

#ifdef WIN32 // Windows
#include <windows.h>
#include <conio.h>
#else // Linux
#define _popen popen
#include <stdlib.h>
#include <unistd.h>
#include <termios.h>

char _getch() {
        char buf = 0;
        struct termios old = { 0 };
        fflush(stdout);
        if (tcgetattr(0, &old)<0)
                perror("tcsetattr()");
        old.c_lflag &= ~ICANON;
        old.c_lflag &= ~ECHO;
        old.c_cc[VMIN] = 1;
        old.c_cc[VTIME] = 0;
        if (tcsetattr(0, TCSANOW, &old)<0)
                perror("tcsetattr ICANON");
        if (read(0, &buf, 1)<0)
                perror("read()");
        old.c_lflag |= ICANON;
        old.c_lflag |= ECHO;
        if (tcsetattr(0, TCSADRAIN, &old)<0)
                perror("tcsetattr ~ICANON");
        printf("%c\n", buf);
        return buf;
}
#endif

char *base_address = "32100000";


void err_check(CAEN_PLU_ERROR_CODE err);

int main()
{

	cm_connect_experiment("", "", "logic_controller", NULL);
   	midas::odb::set_debug(true);

	//Establish a connection with the unit through the V1718
	int handle;
	CAEN_PLU_ERROR_CODE err_code;

	err_code = CAEN_PLU_OpenDevice(CAEN_PLU_CONNECT_VME_V1718, base_address, 0, 0, &handle);
	err_check(err_code);

	//Create an ODB key to hold the V2495 handle
	midas::odb hKey = {{"V2495 Handle", handle}};
	hKey.connect("/Modules/Logic");

	uint32_t firmware;
	err_code = CAEN_PLU_ReadReg(handle, 0x1000, &firmware);
	err_check(err_code);
	printf("Firmware version: %d\n", firmware);
	
	//Initialize Gate and Delay Generators
	err_code = CAEN_PLU_InitGateAndDelayGenerators(handle);
	err_check(err_code);

	//Take the Default gate values from the ODB
	midas::odb def("/Modules/Logic/Default");

	uint32_t commonGate = (uint32_t)def["width"];
        uint32_t commonDelay = (uint32_t)def["delay"];
        uint32_t commonScale = (uint32_t)def["scale"];

	//Set all gates to the same default settings
	err_code = CAEN_PLU_SetGateAndDelayGenerators(handle, commonGate, commonDelay, commonScale);
        err_check(err_code);

	//Watch the ODB subtree
	midas::odb to_watch("/Modules/Logic");
	
	//Lambda function
	//
	// if any of these keys are changed through the web server, 
	// write the new value to the logic unit
	//
	to_watch.watch([](midas::odb &logic){
      		
		//std::cout << "Value of key \"" + logic.get_full_path() + "\" changed to " << logic << std::endl;
		
		CAEN_PLU_ERROR_CODE err_code;

		//Retrieve the V2495 handle
		midas::odb temp("/Modules/Logic");
		int h = temp["V2495 Handle"];

		//Get the QDC parameters
		midas::odb qdc("/Modules/Logic/QDCGateA");
		uint32_t qdcGate = qdc["width"];
		uint32_t qdcDelay = qdc["delay"];
		uint32_t qdcScale = qdc["scale"];

		//Set the new values
		err_code = CAEN_PLU_SetGateAndDelayGenerator(h, 0, 1,  qdcGate, qdcDelay, qdcScale);
                err_check(err_code);
		
		//Get the TDC parameters
		midas::odb tdc("/Modules/Logic/TDCGate");
                uint32_t tdcGate = tdc["width"];
                uint32_t tdcDelay = tdc["delay"];
                uint32_t tdcScale = tdc["scale"];

		//Set the new values
		err_code = CAEN_PLU_SetGateAndDelayGenerator(h, 1, 1, tdcGate, tdcDelay, tdcScale);
                err_check(err_code);

   	});
	
	do {
      		int status = cm_yield(100);
      		if (status == SS_ABORT || status == RPC_SHUTDOWN)
         		break;
   	} while (!ss_kbhit());

	cm_disconnect_experiment();

	return 0;
}

void err_check(CAEN_PLU_ERROR_CODE err)
{
	if (err != CAEN_PLU_OK)
        {
                printf("Error %d\n", err);
                exit(0);
        }
}
Attachment 2: start_daq.PNG
start_daq.PNG
  2146   12 Apr 2021 Ben SmithForumClient gets immediately removed when using a script button.
> 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"?
  2147   12 Apr 2021 Isaac Labrie BoulayForumClient gets immediately removed when using a script button.
> > 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.

I have redirected stdout and stderr into a text file and I have attached it to this entry. From what the stdout says, it seems that the lambda
function gets called 4 times before the program disconnects from the experiment. Somehow the status must become SS_ABORT or RPC_SHUTDOWN.

> 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"? 

There are no interesting messages in the midas.log and "/Programs/logic_controller/Watchdog timeout" is 10000 when I run the command from the terminal window.
What happens when you run it on your test experiment?

I'll try some more debugging.

Thanks for helping me out! Cheers.

Isaac
Attachment 1: debug_logic_controller.txt 
Get definition for ODB key "/Modules/Logic"
Get definition for ODB key "/Modules/Logic/QDCGateA"
Get definition for ODB key "/Modules/Logic/QDCGateA/width"
Get ODB key "/Modules/Logic/QDCGateA/width": 200
Get definition for ODB key "/Modules/Logic/QDCGateA/delay"
Get ODB key "/Modules/Logic/QDCGateA/delay": 10
Get definition for ODB key "/Modules/Logic/QDCGateA/scale"
Get ODB key "/Modules/Logic/QDCGateA/scale": 200
Get definition for ODB key "/Modules/Logic/QDCGateA/width"
Get ODB key "/Modules/Logic/QDCGateA/width": 200
Get definition for ODB key "/Modules/Logic/QDCGateA/delay"
Get ODB key "/Modules/Logic/QDCGateA/delay": 10
Get definition for ODB key "/Modules/Logic/QDCGateA/scale"
Get ODB key "/Modules/Logic/QDCGateA/scale": 200
Get definition for ODB key "/Modules/Logic/TDCGate"
Get definition for ODB key "/Modules/Logic/TDCGate/width"
Get ODB key "/Modules/Logic/TDCGate/width": 200
Get definition for ODB key "/Modules/Logic/TDCGate/delay"
Get ODB key "/Modules/Logic/TDCGate/delay": 10
Get definition for ODB key "/Modules/Logic/TDCGate/scale"
Get ODB key "/Modules/Logic/TDCGate/scale": 200
Get definition for ODB key "/Modules/Logic/TDCGate/width"
Get ODB key "/Modules/Logic/TDCGate/width": 200
Get definition for ODB key "/Modules/Logic/TDCGate/delay"
Get ODB key "/Modules/Logic/TDCGate/delay": 10
Get definition for ODB key "/Modules/Logic/TDCGate/scale"
Get ODB key "/Modules/Logic/TDCGate/scale": 200
Get definition for ODB key "/Modules/Logic/Default"
Get definition for ODB key "/Modules/Logic/Default/width"
Get ODB key "/Modules/Logic/Default/width": 200
Get definition for ODB key "/Modules/Logic/Default/delay"
Get ODB key "/Modules/Logic/Default/delay": 10
Get definition for ODB key "/Modules/Logic/Default/scale"
Get ODB key "/Modules/Logic/Default/scale": 200
Get definition for ODB key "/Modules/Logic/Default/width"
Get ODB key "/Modules/Logic/Default/width": 200
Get definition for ODB key "/Modules/Logic/Default/delay"
Get ODB key "/Modules/Logic/Default/delay": 10
Get definition for ODB key "/Modules/Logic/Default/scale"
Get ODB key "/Modules/Logic/Default/scale": 200
Get definition for ODB key "/Modules/Logic/V2495 Handle"
Get ODB key "/Modules/Logic/V2495 Handle": 0
Get definition for ODB key "/Modules/Logic/QDCGateA"
Get definition for ODB key "/Modules/Logic/QDCGateA/width"
Get ODB key "/Modules/Logic/QDCGateA/width": 200
Get definition for ODB key "/Modules/Logic/QDCGateA/delay"
Get ODB key "/Modules/Logic/QDCGateA/delay": 10
Get definition for ODB key "/Modules/Logic/QDCGateA/scale"
Get ODB key "/Modules/Logic/QDCGateA/scale": 200
Get definition for ODB key "/Modules/Logic/QDCGateA/width"
Get ODB key "/Modules/Logic/QDCGateA/width": 200
Get definition for ODB key "/Modules/Logic/QDCGateA/delay"
Get ODB key "/Modules/Logic/QDCGateA/delay": 10
Get definition for ODB key "/Modules/Logic/QDCGateA/scale"
Get ODB key "/Modules/Logic/QDCGateA/scale": 200
Get definition for ODB key "/Modules/Logic/TDCGate"
Get definition for ODB key "/Modules/Logic/TDCGate/width"
Get ODB key "/Modules/Logic/TDCGate/width": 200
Get definition for ODB key "/Modules/Logic/TDCGate/delay"
Get ODB key "/Modules/Logic/TDCGate/delay": 10
Get definition for ODB key "/Modules/Logic/TDCGate/scale"
Get ODB key "/Modules/Logic/TDCGate/scale": 200
Get definition for ODB key "/Modules/Logic/TDCGate/width"
Get ODB key "/Modules/Logic/TDCGate/width": 200
Get definition for ODB key "/Modules/Logic/TDCGate/delay"
Get ODB key "/Modules/Logic/TDCGate/delay": 10
Get definition for ODB key "/Modules/Logic/TDCGate/scale"
Get ODB key "/Modules/Logic/TDCGate/scale": 200
Get definition for ODB key "/Modules/Logic/Default"
Get definition for ODB key "/Modules/Logic/Default/width"
Get ODB key "/Modules/Logic/Default/width": 200
Get definition for ODB key "/Modules/Logic/Default/delay"
Get ODB key "/Modules/Logic/Default/delay": 10
Get definition for ODB key "/Modules/Logic/Default/scale"
Get ODB key "/Modules/Logic/Default/scale": 200
Get definition for ODB key "/Modules/Logic/Default/width"
Get ODB key "/Modules/Logic/Default/width": 200
Get definition for ODB key "/Modules/Logic/Default/delay"
Get ODB key "/Modules/Logic/Default/delay": 10
Get definition for ODB key "/Modules/Logic/Default/scale"
Get ODB key "/Modules/Logic/Default/scale": 200
Get definition for ODB key "/Modules/Logic/V2495 Handle"
Get ODB key "/Modules/Logic/V2495 Handle": 0
Firmware version: 0
Get definition for ODB key "/Modules/Logic/Default"
Get definition for ODB key "/Modules/Logic/Default/width"
Get ODB key "/Modules/Logic/Default/width": 200
Get definition for ODB key "/Modules/Logic/Default/delay"
Get ODB key "/Modules/Logic/Default/delay": 10
Get definition for ODB key "/Modules/Logic/Default/scale"
Get ODB key "/Modules/Logic/Default/scale": 200
Get definition for ODB key "/Modules/Logic/Default/width"
Get ODB key "/Modules/Logic/Default/width": 200
Get definition for ODB key "/Modules/Logic/Default/delay"
Get ODB key "/Modules/Logic/Default/delay": 10
Get definition for ODB key "/Modules/Logic/Default/scale"
Get ODB key "/Modules/Logic/Default/scale": 200
Get ODB key "/Modules/Logic/Default/width": 200
Get ODB key "/Modules/Logic/Default/delay": 10
Get ODB key "/Modules/Logic/Default/scale": 200
Get definition for ODB key "/Modules/Logic"
Get definition for ODB key "/Modules/Logic/QDCGateA"
Get definition for ODB key "/Modules/Logic/QDCGateA/width"
Get ODB key "/Modules/Logic/QDCGateA/width": 200
Get definition for ODB key "/Modules/Logic/QDCGateA/delay"
Get ODB key "/Modules/Logic/QDCGateA/delay": 10
Get definition for ODB key "/Modules/Logic/QDCGateA/scale"
Get ODB key "/Modules/Logic/QDCGateA/scale": 200
Get definition for ODB key "/Modules/Logic/QDCGateA/width"
Get ODB key "/Modules/Logic/QDCGateA/width": 200
Get definition for ODB key "/Modules/Logic/QDCGateA/delay"
Get ODB key "/Modules/Logic/QDCGateA/delay": 10
Get definition for ODB key "/Modules/Logic/QDCGateA/scale"
Get ODB key "/Modules/Logic/QDCGateA/scale": 200
Get definition for ODB key "/Modules/Logic/TDCGate"
Get definition for ODB key "/Modules/Logic/TDCGate/width"
Get ODB key "/Modules/Logic/TDCGate/width": 200
Get definition for ODB key "/Modules/Logic/TDCGate/delay"
Get ODB key "/Modules/Logic/TDCGate/delay": 10
Get definition for ODB key "/Modules/Logic/TDCGate/scale"
Get ODB key "/Modules/Logic/TDCGate/scale": 200
Get definition for ODB key "/Modules/Logic/TDCGate/width"
Get ODB key "/Modules/Logic/TDCGate/width": 200
Get definition for ODB key "/Modules/Logic/TDCGate/delay"
Get ODB key "/Modules/Logic/TDCGate/delay": 10
Get definition for ODB key "/Modules/Logic/TDCGate/scale"
Get ODB key "/Modules/Logic/TDCGate/scale": 200
Get definition for ODB key "/Modules/Logic/Default"
Get definition for ODB key "/Modules/Logic/Default/width"
Get ODB key "/Modules/Logic/Default/width": 200
Get definition for ODB key "/Modules/Logic/Default/delay"
Get ODB key "/Modules/Logic/Default/delay": 10
Get definition for ODB key "/Modules/Logic/Default/scale"
Get ODB key "/Modules/Logic/Default/scale": 200
Get definition for ODB key "/Modules/Logic/Default/width"
Get ODB key "/Modules/Logic/Default/width": 200
Get definition for ODB key "/Modules/Logic/Default/delay"
Get ODB key "/Modules/Logic/Default/delay": 10
Get definition for ODB key "/Modules/Logic/Default/scale"
Get ODB key "/Modules/Logic/Default/scale": 200
Get definition for ODB key "/Modules/Logic/V2495 Handle"
Get ODB key "/Modules/Logic/V2495 Handle": 0
Get definition for ODB key "/Modules/Logic/QDCGateA"
Get definition for ODB key "/Modules/Logic/QDCGateA/width"
Get ODB key "/Modules/Logic/QDCGateA/width": 200
Get definition for ODB key "/Modules/Logic/QDCGateA/delay"
Get ODB key "/Modules/Logic/QDCGateA/delay": 10
Get definition for ODB key "/Modules/Logic/QDCGateA/scale"
Get ODB key "/Modules/Logic/QDCGateA/scale": 200
Get definition for ODB key "/Modules/Logic/QDCGateA/width"
Get ODB key "/Modules/Logic/QDCGateA/width": 200
Get definition for ODB key "/Modules/Logic/QDCGateA/delay"
Get ODB key "/Modules/Logic/QDCGateA/delay": 10
Get definition for ODB key "/Modules/Logic/QDCGateA/scale"
Get ODB key "/Modules/Logic/QDCGateA/scale": 200
Get definition for ODB key "/Modules/Logic/TDCGate"
Get definition for ODB key "/Modules/Logic/TDCGate/width"
Get ODB key "/Modules/Logic/TDCGate/width": 200
Get definition for ODB key "/Modules/Logic/TDCGate/delay"
Get ODB key "/Modules/Logic/TDCGate/delay": 10
Get definition for ODB key "/Modules/Logic/TDCGate/scale"
Get ODB key "/Modules/Logic/TDCGate/scale": 200
Get definition for ODB key "/Modules/Logic/TDCGate/width"
Get ODB key "/Modules/Logic/TDCGate/width": 200
Get definition for ODB key "/Modules/Logic/TDCGate/delay"
Get ODB key "/Modules/Logic/TDCGate/delay": 10
Get definition for ODB key "/Modules/Logic/TDCGate/scale"
Get ODB key "/Modules/Logic/TDCGate/scale": 200
Get definition for ODB key "/Modules/Logic/Default"
Get definition for ODB key "/Modules/Logic/Default/width"
Get ODB key "/Modules/Logic/Default/width": 200
Get definition for ODB key "/Modules/Logic/Default/delay"
Get ODB key "/Modules/Logic/Default/delay": 10
Get definition for ODB key "/Modules/Logic/Default/scale"
Get ODB key "/Modules/Logic/Default/scale": 200
Get definition for ODB key "/Modules/Logic/Default/width"
Get ODB key "/Modules/Logic/Default/width": 200
Get definition for ODB key "/Modules/Logic/Default/delay"
Get ODB key "/Modules/Logic/Default/delay": 10
Get definition for ODB key "/Modules/Logic/Default/scale"
Get ODB key "/Modules/Logic/Default/scale": 200
Get definition for ODB key "/Modules/Logic/V2495 Handle"
Get ODB key "/Modules/Logic/V2495 Handle": 0
  2148   12 Apr 2021 Ben SmithForumClient gets immediately removed when using a script button.
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;
}
  2149   13 Apr 2021 Isaac Labrie BoulayForumClient gets immediately removed when using a script button.
> 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).
> 

Hi Ben,

I have followed your suggestions and the program still stops immediately. My status as returned from "cm_yield(100)" is always 412 (SS_TIMEOUT) which is fine. 
The issue is that, when run with the script button, the do-wile loop stops immediately because the !ss_kbhit() always evaluates to FALSE.

My temporary solution has been to let the loop run forever :)

Let me know what think. Thanks again!

Isaac

> 
> 
> #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;
> }
  2151   13 Apr 2021 Stefan RittForumClient gets immediately removed when using a script button.
> I have followed your suggestions and the program still stops immediately. My status as returned from "cm_yield(100)" is always 412 (SS_TIMEOUT) which is fine. 
> The issue is that, when run with the script button, the do-wile loop stops immediately because the !ss_kbhit() always evaluates to FALSE.
> 
> My temporary solution has been to let the loop run forever :)

Ahh, could be that ss_kbhit() misbehaves if there is no keyboard, meaning that it is started in the background as a script. 
We never had the issue before, since all "standard" midas programs like mlogger, mhttpd etc. also use ss_kbhit() and they 
can be started in the background via the "-D" flag, but maybe the stdin is then handled differentlhy. 

So just remove the ss_kbhit(), but keep the break, so that you can stop your program via the web page, like

#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 (TRUE);

  cm_disconnect_experiment();

  return 0;
}
  2791   05 Jul 2024 Joseph McKennaSuggestionClean up compiler warning in manalyzer
This is a super small pull request, simple replace deprecated sprintf with snprintf

https://bitbucket.org/tmidas/manalyzer/pull-requests/9
  2844   13 Sep 2024 Konstantin OlchanskiSuggestionClean up compiler warning in manalyzer
> This is a super small pull request, simple replace deprecated sprintf with snprintf
> https://bitbucket.org/tmidas/manalyzer/pull-requests/9

sprintf() is not deprecated and "char buf[256]; sprintf(buf, "%05d", 64-bit-int);" is safe, will never overflow.

we could bulk-convert all these sprintf() to snprintf() but I would rather wait for this:

https://en.cppreference.com/w/cpp/utility/format/format

let me think on this for a bit.

K.O.
  2854   20 Sep 2024 Joseph McKennaSuggestionClean up compiler warning in manalyzer
> > This is a super small pull request, simple replace deprecated sprintf with snprintf
> > https://bitbucket.org/tmidas/manalyzer/pull-requests/9
> 
> sprintf() is not deprecated and "char buf[256]; sprintf(buf, "%05d", 64-bit-int);" is safe, will never overflow.
> 
> we could bulk-convert all these sprintf() to snprintf() but I would rather wait for this:
> 
> https://en.cppreference.com/w/cpp/utility/format/format
> 
> let me think on this for a bit.
> 
> K.O.

I completely agree that the 64-bit int is safe and will never overflow. Doing a little digging, both clang and gcc don't raise warnings on x86_64 (even with -Wall -Wextra -Wpedantic), even when I give it a buffer impossibly small (two bytes). However I've narrowed down the depreciation warning comes from: MacOS

https://developer.apple.com/documentation/kernel/1441083-sprintf

I like the look of std::format, looks cleaner than string streams
  2855   20 Sep 2024 Stefan RittSuggestionClean up compiler warning in manalyzer
> I like the look of std::format, looks cleaner than string streams

I fully agree. String streams is a pain if you want to do zero-leading hex output mixed with decimal output. Yes it's easier to read if you don't know printf syntax,
but 10-20 times more chars to write and not necessarily cleaner.

Proble is that we would have to convert about a few thousand of sprintf's() in midas.

Stefan
  2859   24 Sep 2024 Konstantin OlchanskiSuggestionClean up compiler warning in manalyzer
> > I like the look of std::format, looks cleaner than string streams
> 
> I fully agree. String streams is a pain if you want to do zero-leading hex output mixed with decimal output. Yes it's easier to read if you don't know printf syntax,
> but 10-20 times more chars to write and not necessarily cleaner.
>

IMO c++ string streams formatting is optimized for "hello world" and is useless for printing hex numbers, table-formatted data and generally anything real-life.

plus the borked std::to_string() (it takes a global lock for the "C" locale), "fixed" it by introducing std::to_chars() in C++17,
with "ultimate fix" in std::format in C++26.

no question why C++ has the bad reputation. for a "done right" example, take a look at the Go standard library.

> 
> Probable is that we would have to convert about a few thousand of sprintf's() in midas.
> 

surprising few bare sprintf() remaining in MIDAS, most of them overflow-safe and most of them to be converted to msprintf().

K.O.
  1052   13 May 2015 Andreas SuterForumCheck if Client is running from Javascript
Is there currently an easy way to check from javascript if a midas client is
running? I mean an equivalent to cm_exist.

Sometimes this would be very useful in custom pages.
  1053   13 May 2015 Stefan RittForumCheck if Client is running from Javascript

Andreas Suter wrote:
Is there currently an easy way to check from javascript if a midas client is
running? I mean an equivalent to cm_exist.

Sometimes this would be very useful in custom pages.


Sounds like a good idea. We will add it this summer.
  1054   13 May 2015 Thomas LindnerForumCheck if Client is running from Javascript

Andreas Suter wrote:
Is there currently an easy way to check from javascript if a midas client is
running? I mean an equivalent to cm_exist.

Sometimes this would be very useful in custom pages.


It is not as clean as what you asked, but I have in the past written javascript like this to check if a program is running

var req = new Array();
req[0]= "Programs/towerfe3_00/First failed";
var result = ODBMGet(req);
if(result[0] == 0){
// then program is running
}
  1055   13 May 2015 Konstantin OlchanskiForumCheck if Client is running from Javascript
> Is there currently an easy way to check from javascript if a midas client is running? I mean an equivalent 
to cm_exist.

Yes, I can add an ajax method for cm_exist. While at it, maybe ajax methods for starting and stopping 
clients - to permit fully ajaxed implementation of the "programs" page?

K.O.

(But only under the condition that you post elog messages in "plain" format - fancy formatted messages 
with highlighted word "very" show up as complete dog breakfast in my text based email. If you want to 
highlight something, just say "***!!!***very***!!!***", add more bangs to taste).
  1056   14 May 2015 Andreas SuterForumCheck if Client is running from Javascript
Thanks a lot! This helps for now.

Thomas Lindner wrote:

Andreas Suter wrote:
Is there currently an easy way to check from javascript if a midas client is
running? I mean an equivalent to cm_exist.

Sometimes this would be very useful in custom pages.


It is not as clean as what you asked, but I have in the past written javascript like this to check if a program is running

var req = new Array();
req[0]= "Programs/towerfe3_00/First failed";
var result = ODBMGet(req);
if(result[0] == 0){
// then program is running
}
  2277   19 Sep 2021 Stefan RittBug FixChat working again
Not sure how many people are using it, but the Chat facility in midas was broken 
for some time now and got fixed today again.

Just for your information: Chat can be used like WhatsApp & Co, and connects all 
people who access a midas experiment through their browser. It's good to 
communicate between shift crew members located at different places. One advantage 
is that the chat messages can get 'spoken' by the text-to-speech engine of your 
browser, so it can be used to "wake up" shifters. Can be configured through the 
"Config" page.

Stefan
Attachment 1: Screenshot_2021-09-19_at_21.27.19_.png
Screenshot_2021-09-19_at_21.27.19_.png
  397   26 Jul 2007 Stefan RittInfoChange of pointer type in mvmestd.h
I had to change the pointer type of mvme_read and mvme_write to (void *) instead
to (mvme_locaddr_t *) to avoid warnings under 64-bit linux. Please adjust your
VME drivers if necessary.

- Stefan
  398   12 Aug 2007 Konstantin OlchanskiInfoChange of pointer type in mvmestd.h
> I had to change the pointer type of mvme_read and mvme_write to (void *) instead
> to (mvme_locaddr_t *) to avoid warnings under 64-bit linux. Please adjust your
> VME drivers if necessary.

Updated: vmicvme.c (VMIVME-7750/7805) and gefvme.c (GEFANUC V7865)

K.O.
  1871   03 Apr 2020 Stefan RittInfoChange of TID_xxx data types
We have to request of a 64-bit integer data type to be included in MIDAS banks.
Since 64-bit integers are on some systems "long" and on other systems "long long",
I decided to create the two new data types

TID_INT64
TID_UINT64

which follows more the standard C++ tradition:

https://en.cppreference.com/w/cpp/types/integer

To be consistent, I renamed the old types:

TID_BYTE       -> TID_UINT8
TID_SBYTE      -> TID_INT8
TID_WORD       -> TID_UINT16
TID_SHORT      -> TID_INT16
TID_DWORD      -> TID_UINT32
TID_INT        -> TID_INT32

I left the old definitions in midas.h, so old code will still compile fine and be binary
compatible. But if you write new code, the new types are recommended.

If you save the ODB in ASCII format, the new types are used as stings as well, like

[/Experiment]
ODB timeout = INT32 : 10000

but the old types are still understood when you load an old ODB file.

I hope I didn't break anything, please report if you have any issue.

Stefan
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