How to Spawn Child Processes that Don't Die with Parent?

Question

I have a C++ program that acts as a watchdog over others. If it detects that a process is no longer running, it restarts it via system. The problem is, if I kil

Answer 1

Don't use system(...) it is not multi-threading safe.

int pid = fork();

if(pid==0)
{
  int rc = execv("processname", "/path/to/processConfig.xml &");
  if(rc == -1)
  {
    printf(stderr, "processname failed to start. %d", errno);
  }
  ...
}
else
{
  //continue with the parent
}