[PATCH] test/test_helper: only unlink redirected logs from parent

[Eric Wong <bofh@yhbt.net>]

We don't want at_exit firing in child processes and never wanted
it.  This is apparently a long standing bug in the tests that
only started causing test_worker_dies_on_dead_master failures
for me.  I assume it's only showing up now for me due to kernel
scheduler changes, since I've been using the same 4-core CPU for
~11 years, now.
---
 test/test_helper.rb | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/test/test_helper.rb b/test/test_helper.rb
index 974d2f2..ba5ef16 100644
--- a/test/test_helper.rb
+++ b/test/test_helper.rb
@@ -42,6 +42,7 @@
 def redirect_test_io
   orig_err = STDERR.dup
   orig_out = STDOUT.dup
+  rdr_pid = $$
   new_out = File.open("test_stdout.#$$.log", "a")
   new_err = File.open("test_stderr.#$$.log", "a")
   new_out.sync = new_err.sync = true
@@ -59,8 +60,10 @@ def redirect_test_io
   STDERR.sync = STDOUT.sync = true
 
   at_exit do
-    File.unlink(new_out.path) rescue nil
-    File.unlink(new_err.path) rescue nil
+    if rdr_pid == $$
+      File.unlink(new_out.path) rescue nil
+      File.unlink(new_err.path) rescue nil
+    end
   end
 
   begin