TB10.1 Example Applications: examples/PIPS/posixsignals/asyncSignal/src/sigusr2.c Source File

00001 // sigusr2.c
-00002 //
-00003 // Copyright (c) 2010 Nokia Corporation and/or its subsidiary(-ies).
-00004 // All rights reserved.
-00005 // This component and the accompanying materials are made available
-00006 // under the terms of "Eclipse Public License v1.0"
-00007 // which accompanies this distribution, and is available
-00008 // at the URL "http://www.eclipse.org/legal/epl-v10.html".
-00009 //
-00010 // Initial Contributors:
-00011 // Nokia Corporation - initial contribution.
-00012 //
-00013 // Contributors:
-00014 //
-00015 // Description: The source file for sigusr2 process.
-00016 //
-00017 
-00018 #include <stdio.h>
-00019 #include <stdlib.h>
-00020 #include <signal.h>
-00021 #include <unistd.h>
-00022 #include <e32def.h>
-00023 
-00027 int gVal = TRUE;
-00028 
-00033 void SIGUSR2_handler(int signum)
-00034     {
-00035     if(signum == SIGUSR2)
-00036         {
-00037         printf("Received the SIGUSR2 signal from the sigusr1 process after reading the file.\n");
-00038         gVal = FALSE;
-00039         }
-00040     }
-00041 
-00049 int main(int argc,char **argv)
-00050     {
-00051     pid_t asyProcsID = atoi(argv[1]);  //The variable holding the sigusr1 process PID.
-00052     char ch;
-00053     int ret;
-00054     int arg = argc;
-00055     // Setup the custom handler for SIGUSR2.
-00056     signal(SIGUSR2, SIGUSR2_handler);
-00057     printf("******************** In the sigusr2 process ********************\n");
-00058     
-00059     printf("\nPress the Enter key to send the SIGUSR1 signal to the sigusr1 process\n");
-00060     getchar();
-00061     ret = kill(asyProcsID,SIGUSR1);
-00062     if(ret)
-00063         {
-00064         printf("kill() failed to send signal, errno=%d\n",errno);
-00065         gVal = FALSE;
-00066         }
-00067     
-00068     /* 
-00069      Waiting until a SIGUSR2 signal is obtained from the sigusr1 process.
-00070      This signal is sent after the aynscFile.txt file has been
-00071      read and its content written to the console.
-00072     */
-00073     while(gVal)
-00074         {
-00075         sleep(0);   //Initiates signal handling.
-00076         }
-00077     printf("\nPress 'e'+Enter to exit from the sigusr2 process\n");
-00078     while((ch = getchar())!= 'e')
-00079         {
-00080         if(ch == '\n')
-00081             continue;
-00082         else
-00083             printf("The wrong option was selected, please try again!!!\n");
-00084         }
-00085     return EXIT_SUCCESS;
-00086     }
-