add unshare

2 files changed, 29 insertions, 5 deletions

diff --git a/py/mock.py b/py/mock.py
index e8623de..d742f39 100755
--- a/py/mock.py
+++ b/py/mock.py
@@ -431,6 +431,12 @@ def main(ret):
     if options.mode not in ('chroot', 'shell', 'install', 'installdeps') and config_opts['clean']:
         chroot.clean()
 
+    # New namespace starting from here
+    try:
+        mock.util.unshare(mock.util.CLONE_NEWNS)
+    except:
+        log.info("Namespace unshare failed.")
+
     if options.mode == 'init':
         chroot.init()
 
diff --git a/py/mock/util.py b/py/mock/util.py
index 4710a4b..0f74ac3 100644
--- a/py/mock/util.py
+++ b/py/mock/util.py
@@ -190,16 +190,34 @@ personality_defs['ppc64']  = 0x0000
 personality_defs['i386']   = 0x0008
 personality_defs['ppc']    = 0x0008
 
+import ctypes
+_libc = ctypes.cdll.LoadLibrary("libc.so.6")
+_errno = ctypes.c_int.in_dll(_libc, "errno")
+_libc.personality.argtypes = [ctypes.c_ulong]
+_libc.personality.restype = ctypes.c_int
+
 decorate(traceLog())
 def condPersonality(per=None):
     if personality_defs.get(per, None) is None: return
-    import ctypes
-    _libc = ctypes.cdll.LoadLibrary("libc.so.6")
-    _libc.personality.argtypes = [ctypes.c_ulong]
-    _libc.personality.restype = ctypes.c_int
-    _libc.personality(personality_defs[per])
+    res = _libc.personality(personality_defs[per])
+    if res:
+        raise OSError(_errno.value, os.strerror(_errno.value))
     getLog().debug("set personality (setarch)")
 
+CLONE_NEWNS = 0x00020000
+
+decorate(traceLog())
+def unshare(flags):
+    getLog().debug("Unsharing. Flags: %s" % flags)
+    try:
+        _libc.unshare.argtypes = [ctypes.c_int,]
+        _libc.unshare.restype = ctypes.c_int
+        res = _libc.unshare(flags)
+        if res:
+            raise OSError(_errno.value, os.strerror(_errno.value))
+    except AttributeError, e:
+        pass
+
 # logger =
 # output = [1|0]
 # chrootPath