From: normalperson@...
Date: 2018-07-11T10:33:03+00:00
Subject: [ruby-core:87904] [Ruby trunk Misc#14907] [PATCH] io.c: do not close inherited FDs by default

Issue #14907 has been reported by normalperson (Eric Wong).

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Misc #14907: [PATCH] io.c: do not close inherited FDs by default
https://bugs.ruby-lang.org/issues/14907

* Author: normalperson (Eric Wong)
* Status: Open
* Priority: Normal
* Assignee: akr (Akira Tanaka)
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io.c: do not close inherited FDs by default

While I fully agree Ruby should create FDs with close-on-exec by
default (as it has since 2.0.0); I don't believe Ruby should be
arbitrarily closing file descriptors it does not know about.

The following is an example (using mwrap[1]) where closing
inherited FDs is harmful.

    MWRAP=dump_fd:99 mwrap make -j4 exam 99>>mwrap.out

I only found one minor regression from this change in
test/lib/test/unit.rb as IO.new does not set close-on-exec
when using jobserver FDs from make.  A possible change
is to make IO.new set FD_CLOEXEC by default.

[1] https://80x24.org/mwrap/README.html


---Files--------------------------------
0001-io.c-do-not-close-inherited-FDs-by-default.patch (4.45 KB)


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