using "run()" - child processes persist after parent exits.

[amitmurthy]

If I start a child julia process like this:

julia> @schedule begin
         run(`julia -e "while true; sleep(1); end"`)
       end
Task (waiting) @0x00000000035ac670

and exit the parent process, the child continues to run.

I thought detach was meant to be used when we wanted the child process to outlive the parent, and run was expected to behave otherwise.

Is there a portable way to have children as part of a new process group so that all children receive a SIGHUP when the parent exits?

[amitmurthy]

I recently had to ensure that a spawned tail -f command exited along with the main julia process. I found one way was to define a finalizer on the process object thus - finalizer(proc, (x)->kill(x)) . If this is reliable and guaranteed to work cross-platform, I'll document the same.

[vtjnash]

afaict, the system only delivers SIGHUP if the child process is sleeping (http://pubs.opengroup.org/onlinepubs/9699919799/functions/_Exit.html). i've confirmed this (so some extent) by sending SIGSTOP or SIGTSTP to the child process and observing that it then does exit in response to the parent dying.

but in general http://stackoverflow.com/a/2035683

amit's finalizer solution also seems reasonable to me