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test/ruby/test_process.rb: test for fd=3 usability in child
Ensure we can redirect anything to fd=3 in a child process. This test exists because fd=3 is a commonly reserved FD for a timer thread pipe in the parent Ruby VM, but fd=3 is the first FD used by the sd_listen_fds function for systemd. This means there is a possibility for a bug to slip in where the redirect to fd=3 fails to work. This test should ensure the continued viability of systemd replacements in Ruby :> git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@51146 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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@ -1,3 +1,7 @@
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Sun Jul 5 09:31:40 2015 Eric Wong <e@80x24.org>
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* test/ruby/test_process.rb: test for fd=3 usability in child
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Sat Jul 4 19:43:31 2015 SHIBATA Hiroshi <hsbt@ruby-lang.org>
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* Add test case for empty array and first method with args.
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@ -2029,4 +2029,28 @@ EOS
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}
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assert_equal(th, x)
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end if defined?(fork)
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def test_exec_fd_3_redirect
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# ensure we can redirect anything to fd=3 in a child process.
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# fd=3 is a commonly reserved FD for the timer thread pipe in the
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# parent, but fd=3 is the first FD used by the sd_listen_fds function
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# for systemd
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assert_separately(['-', RUBY], <<-INPUT, timeout: 60)
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ruby = ARGV.shift
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begin
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a = IO.pipe
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b = IO.pipe
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pid = fork do
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exec ruby, '-e', 'print IO.for_fd(3).read(1)', 3 => a[0], 1 => b[1]
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end
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b[1].close
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a[0].close
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a[1].write('.')
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assert_equal ".", b[0].read(1)
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ensure
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a.each(&:close) if a
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b.each(&:close) if b
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end
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INPUT
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end if defined?(fork)
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end
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