Michał Bednarski added the comment:
> Hum, I'm surprised that SELinux blocks such safe function. Maybe the SELinux
> policy should be completed to allow it?
The ioctl is blocked for given file type regardless of request argument. As I'm
running Python on non-rooted Android updating policy is not really an option.
> But do you expect ioctl() to always fail with EACCESS? Or only fail
> sometimes, or only on some file descriptors? Your patch remembers that
> ioctl() fails once and never retries.
It will always fail for given file type (such as sockets), while it will work
for others (such as regular files). I think that remembering that ioctl doesn't
work may be okay, though I may be wrong. Either way if we are wrong whenever
ioctl works we'll do one extra syscall.
> About your patch: please add a comment explaining why you fallback with a
> reference to this issue ("Issue #27057").
Attached
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Added file: http://bugs.python.org/file42900/set_inheritable-eacces.diff
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<http://bugs.python.org/issue27057>
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