Prevents crashes in some other posixmodule.c functions

that do not have the ioctl FIOCLEX and FIONCLEX commands

This also eliminats a dead link to Weave in the process.

that is not found

require ASCII right argument and assert this condition in debug build.

The latter function is more readable, faster and doesn't raise exceptions.

Based on patch by Xiang Zhang.

The latter function is more readable, faster and doesn't raise exceptions.

Based on patch by Xiang Zhang.

The latter function is more readable, faster and doesn't raise exceptions.

The latter function is more readable, faster and doesn't raise exceptions.

on platforms that do not have langinfo