* process.c (check_exec_fds): resolve cascaded child fd reference.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@20511 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 17 insertions, 8 deletions

diff --git a/test/ruby/test_process.rb b/test/ruby/test_process.rb
index 827dde4844..ea90244655 100644
--- a/test/ruby/test_process.rb
+++ b/test/ruby/test_process.rb
@@ -417,21 +417,30 @@ class TestProcess < Test::Unit::TestCase
 
   def test_execopts_redirect_dup2_child
     with_tmpchdir {|d|
-      Process.wait spawn(RUBY, "-e", "STDERR.print 'err'; STDOUT.print 'out'", STDOUT=>"out", STDERR=>[:child, STDOUT])
+      Process.wait spawn(RUBY, "-e", "STDERR.print 'err'; STDOUT.print 'out'",
+                         STDOUT=>"out", STDERR=>[:child, STDOUT])
       assert_equal("errout", File.read("out"))
-      Process.wait spawn(RUBY, "-e", "STDERR.print 'err'; STDOUT.print 'out'", STDERR=>"out", STDOUT=>[:child, STDERR])
+
+      Process.wait spawn(RUBY, "-e", "STDERR.print 'err'; STDOUT.print 'out'",
+                         STDERR=>"out", STDOUT=>[:child, STDERR])
+      assert_equal("errout", File.read("out"))
+
+      Process.wait spawn(RUBY, "-e", "STDERR.print 'err'; STDOUT.print 'out'",
+                         STDOUT=>"out", 
+                         STDERR=>[:child, 3],
+                         3=>[:child, 4], 
+                         4=>[:child, STDOUT]
+                        )
       assert_equal("errout", File.read("out"))
 
       IO.popen([RUBY, "-e", "STDERR.print 'err'; STDOUT.print 'out'", STDERR=>[:child, STDOUT]]) {|io|
         assert_equal("errout", io.read)
       }
 
-      assert_raise(ArgumentError) {
-        Process.wait spawn(*TRUECOMMAND, STDOUT=>[:child, STDOUT])
-      }
-      assert_raise(ArgumentError) {
-        Process.wait spawn(*TRUECOMMAND, STDOUT=>[:child, 3])
-      }
+      assert_raise(ArgumentError) { Process.wait spawn(*TRUECOMMAND, STDOUT=>[:child, STDOUT]) }
+      assert_raise(ArgumentError) { Process.wait spawn(*TRUECOMMAND, 3=>[:child, 4], 4=>[:child, 3]) }
+      assert_raise(ArgumentError) { Process.wait spawn(*TRUECOMMAND, 3=>[:child, 4], 4=>[:child, 5], 5=>[:child, 3]) }
+      assert_raise(ArgumentError) { Process.wait spawn(*TRUECOMMAND, STDOUT=>[:child, 3]) }
     }
   end