Correct descriptions of EINTR and ERESTART errors.  Masked signals don't interrupt sleeps.  Rather, unmasked signals interrupt restarts and can either interrupt the system call by having it return EINTR in userland or force the system call to be restarted.
Correct descriptions of EINTR and ERESTART errors.  Masked signals don't
interrupt sleeps.  Rather, unmasked signals interrupt restarts and can
either interrupt the system call by having it return EINTR in userland or
force the system call to be restarted.

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