how to make a process daemon
If you are looking for a clean approach please consider using standard api- int daemon(int nochdir, int noclose);. Man page pretty simple and self explanatory. man page. A well tested api far outweigh our own implementation interms of portability and stability.
In Linux, it can be easily done using:
int main(int argc, char* argv[]){ daemon(0,0); while(1) { sleep(10) /*do something*/ } return 0;}