wait()'ing for a child process to terminate is correct. But expecting wait() to return -1 on success is causing your block not to execute at all because wait() can also return the PID of the process it found just terminated. E.g. from the wait documentation:

wait: Behaves like wait(2) on your system: it waits for a child process to terminate and returns the pid of the deceased process, or -1 if there are no child processes.

So you just need to remove that == -1 check.

That said, wait() waits for ANY child process including those by a system command. Why not being explicit and wait for YOUR OWN child with waitpid($pid, 0)?

bw, bliako

Edit: kcott made the same diagnosis a few minutes earlier, though I read it after posting.

In reply to Re: Multiprocess - child process cannot be finished successfully by bliako
in thread Multiprocess - child process cannot be finished successfully by wonderG

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