diff --git a/pym/cl_fill.py b/pym/cl_fill.py
index 51b43ac..db8f940 100644
--- a/pym/cl_fill.py
+++ b/pym/cl_fill.py
@@ -607,6 +607,13 @@ class fillVars(varsShare):
         else:
             return ""
 
+    def get_cl_chroot_status(self):
+        """Detect chroot mode by mtab content"""
+        try:
+            return "on" if self.isChroot(os.getpid()) else "off"
+        except:
+            return "off"
+
     def get_os_scratch(self):
         """Current system is scratch"""
         if self.Get('os_root_type') == 'livecd':
diff --git a/pym/cl_vars.py b/pym/cl_vars.py
index e04142d..348d3dd 100644
--- a/pym/cl_vars.py
+++ b/pym/cl_vars.py
@@ -61,6 +61,9 @@ class Data:
     # paths to clt-template files
     cl_template_clt_path = {'hide':True}
 
+    # is shell in chroot
+    cl_chroot_status = {'hide':True}
+
     # locale (at example: ru_RU.UTF-8)
     os_locale_locale = {'hide':True}
 
diff --git a/pym/cl_vars_share.py b/pym/cl_vars_share.py
index 81b9da8..53926fd 100644
--- a/pym/cl_vars_share.py
+++ b/pym/cl_vars_share.py
@@ -505,3 +505,21 @@ class varsShare:
             reRes = reVer.search(kernelVersion)
             if reRes:
                 return reRes.group()
+
+    reChroot = re.compile("^(?:_=.*bin/chroot|CHROOT=on)$",re.S)
+
+    def isChroot(self,pid):
+        """Recursive detect chroot mode"""
+        if not os.access('/proc/%d/environ'%pid,R_OK):
+            return False
+        if filter(self.reChroot.match,
+                  open('/proc/%d/environ'%pid,'r').read().split('\x00')):
+            return True
+        else:
+            ppid = filter(lambda x:x.startswith('PPid:'),
+                              open('/proc/%d/status'%pid,'r').readlines())[0]
+            ppid = int(ppid.strip().partition('\t')[2])
+            if ppid == 0:
+                return False
+            else:
+                return self.isChroot(ppid)