From cfa51506fb546296d7f60e400c334266d8f5668d Mon Sep 17 00:00:00 2001
From: BlahGeek <i@BlahGeek.com>
Date: Sat, 20 Aug 2016 12:00:03 +0800
Subject: [PATCH] prevent infinity loop while detecting shell

In OS X, Process(pid=0).parent() == Process(pid=0)
---
 thefuck/shells/__init__.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/thefuck/shells/__init__.py b/thefuck/shells/__init__.py
index 0413f6bf..9a62225f 100644
--- a/thefuck/shells/__init__.py
+++ b/thefuck/shells/__init__.py
@@ -22,7 +22,7 @@ shells = {'bash': Bash,
 def _get_shell():
     proc = Process(os.getpid())
 
-    while proc is not None:
+    while proc is not None and proc.pid > 0:
         try:
             name = proc.name()
         except TypeError: