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-rw-r--r--lib/unicorn/launcher.rb2
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/unicorn/launcher.rb b/lib/unicorn/launcher.rb
index 2d6ad97..0ea836b 100644
--- a/lib/unicorn/launcher.rb
+++ b/lib/unicorn/launcher.rb
@@ -42,7 +42,7 @@ class Unicorn::Launcher
 
       if grandparent == $$
         # this will block until HttpServer#join runs (or it dies)
-        master_pid = rd.sysread(16).to_i
+        master_pid = rd.readpartial(16).to_i
         exit!(1) unless master_pid > 1
         exit 0
       else # unicorn master process