Device Details -TI Sitara am437x -ARM Cortex A9 -OS Ubuntu 14.04 -Azure C SDK version 1.1.13 (release_2017_04_21)

Description of the issue:

We want to use the firmware upgrade feature of azure c SDK using MQTT protocol for carrying out firmware upgrade on our device. After cross-compilation of SDK the generated library files are integrated in our device environment . The files "iothub_client_sample_mqtt_dm.c" and "pi.c " are used by application for firmware upgrade. The issue here is that the device initiates the process but sticks up in a particular function "device_run_service() " in the code ; the print logs under the code doesn't print anything. So need to understand this function named as "device_run_service() " in "pi.c " file . Now we have commented the function and we are able to move ahead till a point that is we are able to enter this function "iothub_client_sample_mqtt_dm_run(connectionString, traceOn)" but now we face different error which sums up with the cloud not registering the device id on the azure iothub.We also start the server application but firmware upgrade doesn't start as expected. Can disabling " device_run_service() " function impact the functionality ? or is this function carrying out some device specific task which we need to modify as per our device ? What is the purpose of function " device_run_service() " ?

Code sample exhibiting the issue:

bool device_run_service(void) { int pid, sid; bool retValue;

HERE PRINTF HAS BEEN ADDED SO THAT FUNCTION ENTRY CAN BE KNOWN BUT PRINTF PRINTLOG NOTHING GIVES A PRINT. THIS IS ORIGINAL CODE WE HAVE BEEN USING THE SAME CODE BUT HAVE ADDED PRINTS AT THIS POINT

/ Fork off the parent process / pid = fork(); if (pid < 0) { LogError("failed to fork from parent process: %p\n", pid); retValue = false; } else { if (pid > 0) { / exit the parent process / exit(EXIT_SUCCESS); } else { / child process segment / / Change the file mode mask / umask(0);

        /* Create a new SID for the child process */
        sid = setuid(0);
        if (sid < 0)
        {
            retValue = false;
            LogError("failed to set sudo");
        }
        else
        {
            /* Change the current working directory */
            if ((chdir("/")) < 0)
            {
                LogError("failed to chdir to '/'");
                retValue = false;
            }
            else
            {
                /* Close out the standard file descriptors */
                if (close(STDIN_FILENO) != 0)
                {
                    LogError("failed to close standard input");
                }
                if (close(STDOUT_FILENO) != 0)
                {
                    LogError("failed to close standard output");
                }
                if (close(STDERR_FILENO) != 0)
                {
                    LogError("failed to close standard error");
                }

                retValue = true;
            }
            /* Allow time for all needed system services to initialize */
            ThreadAPI_Sleep(30000);
        }
    }
}
return retValue;

}

Azure / azure-iot-sdk-c

Azure firmware upgrade doesn't start, application exits in this function "device_run_service() " #131

Description of the issue:

Code sample exhibiting the issue:

HERE PRINTF HAS BEEN ADDED SO THAT FUNCTION ENTRY CAN BE KNOWN BUT PRINTF PRINTLOG NOTHING GIVES A PRINT. THIS IS ORIGINAL CODE WE HAVE BEEN USING THE SAME CODE BUT HAVE ADDED PRINTS AT THIS POINT

Console log of the issue: