unix_listener_stats follows and remembers symlinks

Teach unix_listener_stats to remember the symlink path
it followed and have it point to the same object as the
resolved (real) socket path.

This allows the case where looking up stats by symlinks
works if the symlink is given to unix_listener_stats:

  File.symlink("/real/path/of.sock", "/path/to/link.sock")
  stats = unix_listener_stats(["/path/to/link.sock"])
  stats["/path/to/link.sock"] => # same as stats["/real/path/of.sock"]

1 files changed, 11 insertions, 9 deletions

diff --git a/test/test_linux.rb b/test/test_linux.rb
index 81463c9..a84eecf 100644
--- a/test/test_linux.rb
+++ b/test/test_linux.rb
@@ -73,24 +73,26 @@ class TestLinux < Test::Unit::TestCase
     us = UNIXServer.new(tmp.path)
 
     # Create a symlink
-    destination = Tempfile.new("somethingelse")
-    destination.unlink # We need an available name, not an actual file
-    link = File.symlink(tmp, destination)
+    link = Tempfile.new("somethingelse")
+    File.unlink(link.path) # We need an available name, not an actual file
+    File.symlink(tmp.path, link.path)
 
     @to_close << UNIXSocket.new(tmp.path)
     stats = unix_listener_stats
-    assert_equal 0, stats[link.path].active
-    assert_equal 1, stats[link.path].queued
+    assert_equal 0, stats[tmp.path].active
+    assert_equal 1, stats[tmp.path].queued
 
-    @to_close << UNIXSocket.new(tmp.path)
-    stats = unix_listener_stats
+    @to_close << UNIXSocket.new(link.path)
+    stats = unix_listener_stats([link.path])
     assert_equal 0, stats[link.path].active
     assert_equal 2, stats[link.path].queued
 
+    assert_equal stats[link.path].object_id, stats[tmp.path].object_id
+
     @to_close << us.accept
     stats = unix_listener_stats
-    assert_equal 1, stats[link.path].active
-    assert_equal 1, stats[link.path].queued
+    assert_equal 1, stats[tmp.path].active
+    assert_equal 1, stats[tmp.path].queued
   end
 
   def test_tcp