int cleanup_terminated_children(void)
{
pid_t pid;
int status;
int count = 0;
while (1)
{
pid = waitpid(-1, &status, WNOHANG);
if (pid == 0) /* returns 0 if no child process to wait for */
{
break;
}
if (pid == -1) /* returns -1 if there was an error */
{
/* errno will have been set by waitpid() */
if (errno == ECHILD) /* no children */
{
break;
}
if (errno == EINTR) /* waitpid() was interrupted by a signal */
{
continue; /* try again */
}
else
{
printf("unexpected error in cleanup_terminated_children(): %s\n",
strerror(errno));
break;
}
}
//print_wait_status(pid, status); /* supply this yourself */
printf("process %d, completed normally, status %d\n", pid, status);
update_process_table(pid, status);
remove_process_table(pid);
count++;
}
return count;
}
// Function to check for any terminated child processes, and remove
// them from the process table
int cleanup_terminated_children()
{
pid_t pid;
int status;
int count = 0;
while (1)
{
pid = waitpid(-1, &status, WNOHANG);
if (pid == 0) /* returns 0 if no child process to wait for */
{ break; }
if (pid == -1) /* returns -1 if there was an error */
{
/* errno will have been set by waitpid() */
if (errno == ECHILD) /* no children */
{ break; }
if (errno == EINTR) /* waitpid() was interrupted by a signal */
{ /* try again */
continue;
}
else
{
printf("unexpected error in cleanup_terminated_children(): %s\n",
strerror(errno));
break;
}
}
if(pr7_debug)
printf("pid is %d, status is %d\n", (int)pid, status);
update_process_table(process_table, pid, status);
remove_process_table(process_table, pid);
count++;
}
return count;
}