From 033e8e5b61fa4f800900b5d7487c575014b3761b Mon Sep 17 00:00:00 2001 From: normal Date: Sun, 5 Jul 2015 00:40:14 +0000 Subject: 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 --- test/ruby/test_process.rb | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+) (limited to 'test/ruby') diff --git a/test/ruby/test_process.rb b/test/ruby/test_process.rb index a43dcf475c..cb9440c836 100644 --- a/test/ruby/test_process.rb +++ b/test/ruby/test_process.rb @@ -2029,4 +2029,28 @@ EOS } assert_equal(th, x) end if defined?(fork) + + def test_exec_fd_3_redirect + # ensure we can redirect anything to fd=3 in a child process. + # fd=3 is a commonly reserved FD for the timer thread pipe in the + # parent, but fd=3 is the first FD used by the sd_listen_fds function + # for systemd + assert_separately(['-', RUBY], <<-INPUT, timeout: 60) + ruby = ARGV.shift + begin + a = IO.pipe + b = IO.pipe + pid = fork do + exec ruby, '-e', 'print IO.for_fd(3).read(1)', 3 => a[0], 1 => b[1] + end + b[1].close + a[0].close + a[1].write('.') + assert_equal ".", b[0].read(1) + ensure + a.each(&:close) if a + b.each(&:close) if b + end + INPUT + end if defined?(fork) end -- cgit v1.2.3