Is it safe to fork from within a thread?

Question

Let me explain: I have already been developing an application on Linux which forks and execs an external binary and waits for it to finish. Results are communicated by shm f

Answer 1

forking, even with threads, is safe. Once you fork, the threads are independent per process. (That is, threading is orthogonal to forking). However, if the threads in different processes use the same shared memory to comunicate, you have to devise a synchronization mechanism.