* Thomas Stüfe: > This is impossible to fix completely - see Martin's comment about the > impossibility to foresee whether an exec() will succeed without actually > exec()ing. But at least we can test the execute permissions on the > jspawnhelper. Which this fix does. This fixes Ubuntu 16.4 (Now, I get an > IOException if jspawnhelper is not executable).
I think jspawnhelper could write something to the pipe to show that it has started. If you never get that notification, you know that jspawnhelper hasn't run, even if posix_spawn has succeeded. (This fix will also help qemu-user and WSL, which implement vfork as fork and interfere with the internal error reporting from posix_spawn.) Thanks, Florian
