Hi,
I have a program that fork()'s + execlp()'s two children. Later in the
program I want to send a signal to the parent(SIGINT) . The parent's signal
handler should then send signals to these two children. I am able to catch
the signal in the parent - on catching this signal I invoke a function that
sends kill(childPid[i],SIGINT) but the signal handler in the child doesn't
seem to be getting invoked. Can someone please tell me why this is
happenning? Since this is kind of urgent I would greatly appreciate a speedy
response. Thanks a lot!
I am including the code below - first the parent's and following that the
child's
Parent code:
void sendKillsToChildren()
{
int i;
for(i=0;i<nNValue;i++)
{
printf("sending kil to %d\n",childPids[i]);
kill(childPids[i],SIGINT);
}
}
void signalHandler(int dud)
{
printf("ctrl-c pressed\n");
printf("sendKillsToChildren\n");
sendKillsToChildren();
}
int main()
{
signal(SIGINT,signalHandler);
int i;
childPids=(int*)malloc(nNValue*sizeof(pid_t));
for(i=0;i<2;i++)
{
switch(childPids[i]=fork())
{
case -1:
//Error
perror("Error in fork() in godclass::forkOne()");
break;
case 0:
//In Child
execlp("child.o",0);
break;
default:
//In parent
printf("child[%d]=%d\n",i,childPids[i]);
break;
}
}
while(1);
}
Child code:
void signalHandler(int dud)
{
printf("recvd signal in %d\n",getpid());
}
int main()
{
signal(SIGINT,signalHandler);
printf("in child process %d\n",getpid());
}
