Add print-to-a-file option when executing a command in functest_utils

Change-Id: I8b91979380d0f4794d5ceaf8edb2a9d80cd7170f
Signed-off-by: jose.lausuch <jose.lausuch@ericsson.com>
(cherry picked from commit 75479a40514ef2cea93d2ef032e5bfe00f987714)

1 files changed, 11 insertions, 4 deletions

diff --git a/utils/functest_utils.py b/utils/functest_utils.py
index 8c5dd835a..644ad1a1b 100644
--- a/utils/functest_utils.py
+++ b/utils/functest_utils.py
@@ -294,7 +294,7 @@ def get_ci_envvars():
 
 
 def execute_command(cmd, exit_on_error=True, info=False, error_msg="",
-                    verbose=True):
+                    verbose=True, output_file=None):
     if not error_msg:
         error_msg = ("The command '%s' failed." % cmd)
     msg_exec = ("Executing command: '%s'" % cmd)
@@ -305,10 +305,17 @@ def execute_command(cmd, exit_on_error=True, info=False, error_msg="",
             logger.debug(msg_exec)
     p = subprocess.Popen(cmd, shell=True, stdout=subprocess.PIPE,
                          stderr=subprocess.STDOUT)
+    if output_file:
+        f = open(output_file, "w")
     for line in iter(p.stdout.readline, b''):
-        line = line.replace('\n', '')
-        print line
-        sys.stdout.flush()
+        if output_file:
+            f.write(line)
+        else:
+            line = line.replace('\n', '')
+            print line
+            sys.stdout.flush()
+    if output_file:
+        f.close()
     p.stdout.close()
     returncode = p.wait()
     if returncode != 0: