int
main (void)
{
struct sigaction usr_action;
sigset_t block_mask;
pid_t child_id;
/* Establish the signal handler. */
sigfillset (&block_mask);
usr_action.sa_handler = synch_signal;
usr_action.sa_mask = block_mask;
usr_action.sa_flags = 0;
sigaction (SIGUSR1, &usr_action, NULL);
/* Create the child process. */
child_id = fork ();
if (child_id == 0)
child_function (); /* Does not return. */
/*@group*/
/* Busy wait for the child to send a signal. */
while (!usr_interrupt)
;
/*@end group*/
/* Now continue execution. */
puts ("That's all, folks!");
return 0;
}
// ========== Connection Handling ==========
void handle_connection()
{
pid_t pid;
int cfd;
char c;
// Wait to accept connection
cfd = accept(sfd, NULL, NULL);
if (cfd == -1) {
crit_error("Could not accept connections");
}
pid = fork();
if (pid == -1)
error("Fork");
if (pid == 0) { // we are the child.
child_function(cfd);
printf("Spawned child exiting.\n");
while(read(cfd, &c, 1) > 0);
std::cout << "Connection reading..." << std::endl;
close(cfd);
std::cout << "Connection closed." << std::endl;
exit(0);
} else { // we are the parent
close(cfd); // the child handles this
}
}
int main()
{
pid_t child_id;
signal(SIGUSR1, sig_usr);
child_id = fork();
if(child_id == 0)
child_function();
while(!usr_interrupt);
puts("That's all.");
return 0;
}
int start_server()
{
int r;
int pid;
r = initialize_server();
if (r < 0)
{
LOG("Initialazing failed ... code %d\n",r);
return -1;
}
//we start the 6 processes:
// 4 listen on udp, one on TLS and one is a timer
for (r=0;r<MAX_PROCESSES;r++)
{
pid = fork();
if (pid<0)
{
LOG("start_server:cannot fork\n");
return -2;
}
else
if (pid == 0) //child
{
child_function(r+1);
}
else //dad
{
//LOG("Child %d started[%d]\n",r+1,pid);
pids[r] = pid;
}
}
if (dont_fork == 1)
{
for(;;)
pause();
}
else
{
sleep(10);//to be sure
cleanup(1);
while(wait(0)>0);
return 0;
}
//LOG("starting server ... ok\n");
return 0;
}
int
main (void)
{
#ifdef MULTIPROCESS
pid_t child;
child = fork ();
if (child == -1)
return 1;
#endif
mypid = getpid ();
#ifdef MULTIPROCESS
if (child != 0)
parent_function (child);
else
#endif
child_function ();
/* Not reached. */
abort ();
}
int main(int argc, char *argv[]) {
char file[80];
printf("Please specify a file to copy to /tmp?");
scanf("%80s", file);
pid_t child = fork();
if (child == -1) {
perror("Could not fork");
} else if (child == 0) { //Parent
return child_function(file);
}
while (waitpid(child, NULL, WNOHANG) == 0) {
printf("What is your name\n");
char name[80];
char color[80];
scanf("%s", name);
printf("What is your favorite color?\n");
scanf("%s", color);
}
return 0;
}
