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[Massimiliano Gubinelli <address@hidden>]

Hi again,
  

> On 11. Dec 2018, at 20:11, Nicola Mingotti <address@hidden> wrote:
> 
> Hi again,
> 
> I am puzzled, I am trying to get the SIGINT from my plugin
> but it seems to me TeXmacs is not sending that signal.
> 


Seems there is a bug with the signals. I attach a patch and a test program 
(which has to be installed as a plugin).

I will commit a patch in svn.

Best
Max


-----------------------------------------------------------------------
The patch
-8<---------------------------------------------------------------------
Index: src/Plugins/Qt/qt_pipe_link.cpp
===================================================================
--- src/Plugins/Qt/qt_pipe_link.cpp     (revision 11316)
+++ src/Plugins/Qt/qt_pipe_link.cpp     (working copy)
@@ -148,7 +148,11 @@
   qt_error << "SIGINT not implemented on Windows\n";
 #else
   Q_PID pid = PipeLink.pid ();
-  int ret =  ::killpg (pid, SIGINT);
+  
+  // REMARK: previously there were here below a call to ::killpg which does 
not seems to work on MacOS
+  // I (mgubi) replaced it with ::kill which does the job. But I do not 
undestand the difference.
+  
+  int ret =  ::kill (pid, SIGINT);
   if (ret == -1) {
     qt_error << "Interrupt not successful, pid: " << pid << " return code: " 
<< errno << "\n";
   }
-8<--------------------------------------------------------------------
The test program
-8<--------------------------------------------------------------------
#include <iostream>
#include <unistd.h>
#include <csignal>

using namespace std;

#define DATA_BEGIN   ((char) 2)
#define DATA_END     ((char) 5)
#define DATA_ESCAPE  ((char) 27)

bool trig = true;
int cc = 0;

void signalHandler( int signum ) {
    trig = false;
}

int
main () {
  cout << DATA_BEGIN << "verbatim:";
  cout << "STARTING\n";
  cout << DATA_END;
  cout.flush ();

  // register signal SIGINT and signal handler
  signal(SIGINT, signalHandler);

    while (1) {
        char buffer[100];
        cin.getline (buffer, 100, '\n');
        cout << DATA_BEGIN << "verbatim:";
        cout << "Input: " << buffer << "\n";
        cout.flush ();

        while (trig) {
            cout << "Going to sleep.... (" << cc ++ << ")\n";
            cout.flush ();
            sleep (1);
        }
        cout << DATA_END;
        cout.flush ();
        trig = true; cc = 0;
    }
  return 0;
}
-8<--------------------------------------------------------------------


> I am using TeXmacs version 1.99.4 in FreeBSD.
> 
> Do you know of any plugin who is actually managing SIGINT correctly ?
> I tried Python (not working, not implemented IFACSay), Scheme (no button), 
> Maxima (not working).
> 
> I test the SIGINT is not working in this way, for Python i can actually
> check there is not signal receiver in the code, so, not a TeXmacs problem, 
> but the method I use in general is:
> 
> 1] Run a sleep command, 10 seconds
> 2] Press the STOP button in TeXmacs
> 3] Run a simple arithmentic command e.g. 1+1
> 
> === Pyjhon ===
> > import time
> > timp.sleep(10)
> PRESS QUIT
> > 1+1
> HANGS till end of sleep
> =============
> 
> ==== Maxima ====
> > :lisp (sleep 10)
> PRESS QUIT
> > 1
> HANGS till end of sleep
> ================
> 
> Maybe also Maxima plugin is not catching the SIGINT...
> In my plugin managed to receive the signal but I don't see it coming when i 
> press the STOP button.
> 
> Do you know something about it ?
> 
> bye
> Nicola
> 
> 
>