[CRIU] [PATCH 1/3] p.haul: add helper function to get criu version

[Nikita Spiridonov]

Add helper function which exec criu with -V flag and parse its
output to obtain criu version.

Signed-off-by: Nikita Spiridonov <nspiridonov at virtuozzo.com>
---
 phaul/criu_api.py |   10 ++++++++++
 1 files changed, 10 insertions(+), 0 deletions(-)

diff --git a/phaul/criu_api.py b/phaul/criu_api.py
index 72ed256..4926330 100644
--- a/phaul/criu_api.py
+++ b/phaul/criu_api.py
@@ -5,6 +5,7 @@
 
 import socket
 import os
+import re
 import subprocess
 import logging
 import util
@@ -83,6 +84,15 @@ class criu_conn:
 		self._track_mem = value
 
 
+def get_criu_version():
+	proc = subprocess.Popen([criu_binary, "-V"],
+		stdout=subprocess.PIPE, stderr=subprocess.STDOUT)
+	proc_output = proc.communicate()[0]
+	if proc.returncode == 0:
+		match = re.match("Version:\s+(\S+)", proc_output)
+		return match.group(1) if match else None
+
+
 #
 # Helper to read CRIU-generated statistics
 #
-- 
1.7.1