HAM can detect the death of the following types of processes in the system
a) self attached entities
b) processes in session 1 (processes that have become daemons, by calling procmgr_daemon)
c) processes that die abnormally (i.e. die via a core dump, and dumper is running on the target)

Can you post the output of ham -vvvvv when you kill test, in both the success and the failure cases?

the output now just shows the output when the conditions have been added, but not when the process death occurs.

What signal are you sending to test to kill it. Is dumper running on the target?

the verbose output of HAM will show the death and restart of the process, in both cases ad1 and ad2. So that output will
 tell us the difference between the two cases and why things don't work

thanks
shiv

-----Original Message-----
From: Vilem Pantucek [mailto:community-noreply@qnx.com]
Sent: Wed 6/16/2010 10:26 AM
To: ostech-core_os
Subject: HAM - problem with attaching of runnig process to ham
 
Hello, 
 
I wrote program ham_add, that attaches the test process to a HAM, and then establishes a condition death 
and an action restart under it. 
 

    if (argc > 1)
        inetdpath = strdup(argv[1]);    
    else 
        inetdpath = strdup("test");
    if (argc > 2)
        inetdpid = atoi(argv[2]);
    else
        inetdpid = -1;
        
    if((retval = ham_connect(0)) == -1)
    {
       fprintf(stderr, "ham_connect: error:%d - %s\n", errno, strerror(errno));
       return;
    }
    ehdl = ham_attach("test", ND_LOCAL_NODE, inetdpid, inetdpath, 0);
    if (ehdl != NULL)
    {
       chdl = ham_condition(ehdl,CONDDEATH, "death", HREARMAFTERRESTART);
       if (chdl != NULL) 
       {
           ahdl = ham_action_restart(chdl, "restart", inetdpath, HREARMAFTERRESTART);
           if (ahdl == NULL)    
               printf("add action failed\n");
        }
        else
            printf("add condition failed\n");
    }
    else
        printf("add entity failed\n");
    ham_disconnect(0);
 
  
In your help to ham_attach() function is writen:
 
You use the ham_attach() to attach an entity to the HAM. 
An entity can be any process on the system. You can use this function to: 
1/ tell the HAM to start a process and then add it as an entity to its context. (this work's fine)
2/ attach a process that's already running 
 
Problem:
Case ad2/ dosn't work. I run "./test" "./ham_add test pid_of_test". Ham apears, that all is OK, but when I 
kill test, ham doesn't restart test. In case ad1/ it work's fine.
 
All source code, ham dump and information under the /proc/ham are in attached file.
ham_add_test.txt - print out from ham -vvvvv in case ad1/
ham_add_test_pid.txt - print out from ham -vvvvv in case ad2/
 
Wath's wrong, can anybody help me solve this problem? Thank's.
 
Regard.
Ales




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OSTech
http://community.qnx.com/sf/go/post56968