[Python-Dev] Re: Signal-resistant code (was: Two random and nearly unrelated ideas) (original) (raw)

Neil Schemenauer nas@python.ca
Thu, 5 Sep 2002 11:52:28 -0700

Oren Tirosh wrote:

If this macro is defined you will never get EINTR so there's no need to worry about this. If it isn't defined you need to restart system calls yourself.

I don't think that is correct. Only certain systems calls will be restarted (for BSD 4.2 it's ioctl, read, readv, write, writev, wait, and waitpid). I think the system calls restarted varies depending on the OS.

Signals are a gigantic mess. I'm starting to doubt that you realize the extent of the brain damage. While I would be pleased if there was some way Python could hide the mess, I'm not convinced it is possible.

Neil