Issue #17611 has been reported by nobu (Nobuyoshi Nakada).

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Feature #17611: Expose `rb_execarg` interfaces and `rb_grantpt`
https://bugs.ruby-lang.org/issues/17611

* Author: nobu (Nobuyoshi Nakada)
* Status: Open
* Priority: Normal
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An opaque `struct rb_execarg` has been added 9 years ago, and the latest change on functions deal with it was 3 years ago.
Also, it has been 3 years since `rb_grantpt` was added.
These seem stable enough to expose now, but are still internal, and stopping pty from becoming a gem.

Maybe `rb_grantpt` can be more generic, e.g., calling a function with supspending `waitpid`, though.



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