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rdev

        # File::Stat.rdev

(from ruby core)
### Implementation from Stat
---
    stat.rdev   ->  integer or nil

---

Returns an integer representing the device type on which *stat* resides.
Returns `nil` if the operating system doesn't support this feature.

    File.stat("/dev/fd1").rdev   #=> 513
    File.stat("/dev/tty").rdev   #=> 1280



      

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