From c409459272b4c8584ee280151e449079a6bf232f Mon Sep 17 00:00:00 2001
From: HonigBij <prkoper+git@gmail.com>
Date: Tue, 25 Aug 2015 11:07:21 +0200
Subject: [PATCH] Added is_link() to core/fs.py to enable cd into symbolic link
 in commands/fs.py

---
 cowrie/commands/fs.py | 3 +++
 cowrie/core/fs.py     | 7 +++++++
 2 files changed, 10 insertions(+)

diff --git a/cowrie/commands/fs.py b/cowrie/commands/fs.py
index 32b433d..994efa0 100644
--- a/cowrie/commands/fs.py
+++ b/cowrie/commands/fs.py
@@ -52,6 +52,9 @@ class command_cd(HoneyPotCommand):
         if newdir is None:
             self.writeln('bash: cd: %s: No such file or directory' % path)
             return
+        if self.fs.is_link(newpath):
+            f = self.fs.getfile(newpath)
+            newpath = f[A_TARGET]
         if not self.fs.is_dir(newpath):
             self.writeln('bash: cd: %s: Not a directory' % path)
             return
diff --git a/cowrie/core/fs.py b/cowrie/core/fs.py
index 74894ce..77119f2 100644
--- a/cowrie/core/fs.py
+++ b/cowrie/core/fs.py
@@ -185,6 +185,13 @@ class HoneyPotFilesystem(object):
         self.newcount += 1
         return True
 
+    def is_link(self, path):
+        try:
+            f = self.getfile(path)
+        except:
+            return False
+        return f[A_TYPE] == T_LINK
+
     def is_dir(self, path):
         if path == '/':
             return True