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File _service:tar_scm:Rewrite-unix-fork-reopen-to-be-compatible-with-ruby-.patch of Package rubygem-childprocess (Revision 5fed68d7e6c5ac9b7c898af558c59a42)

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From 975e87883a4f65966df59a5e757f03b66dd7e571 Mon Sep 17 00:00:00 2001
From: Hans de Graaff <hans@degraaff.org>
Date: Mon, 29 Apr 2019 18:41:35 +0200
Subject: [PATCH] Rewrite unix fork reopen to be compatible with ruby 2.6

On ruby 2.6 the original code would fail specs:

lib/childprocess/unix/fork_exec_process.rb:32:in `reopen': exclusive
access mode is not supported (ArgumentError)

The documentation for reopen shows that it has two ways to call it:

reopen(other_IO) -> ios
  reopen(path, mode [,opt]) -> ios

With ruby 2.4 and 2.5 calling reopen with a path and no mode seems to
work fine, but with ruby 2.6 this triggers the spec failure.

This commit splits the calls based on stdout/stderr availability so
that both types of reopen calls can get the required parameters. This
fixes the 2.6 specs while being backward compatible with ruby 2.4 and
2.5.
---
 lib/childprocess/unix/fork_exec_process.rb | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/lib/childprocess/unix/fork_exec_process.rb b/lib/childprocess/unix/fork_exec_process.rb
index 5ed2a79..cc7a850 100644
--- a/lib/childprocess/unix/fork_exec_process.rb
+++ b/lib/childprocess/unix/fork_exec_process.rb
@@ -29,8 +29,16 @@ module ChildProcess
           exec_r.close
           set_env
 
-          STDOUT.reopen(stdout || "/dev/null")
-          STDERR.reopen(stderr || "/dev/null")
+          if stdout
+            STDOUT.reopen(stdout)
+          else
+            STDOUT.reopen("/dev/null", "a+")
+          end
+          if stderr
+            STDERR.reopen(stderr)
+          else
+            STDERR.reopen("/dev/null", "a+")
+          end
 
           if duplex?
             STDIN.reopen(reader)
-- 
2.33.0